log_event.cc 313 KB
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/*
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   Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; version 2 of the License.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/
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#ifdef MYSQL_CLIENT

#include "mysql_priv.h"

#else
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation				// gcc: Class implementation
#endif
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#include "mysql_priv.h"
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#include "slave.h"
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#include "rpl_rli.h"
#include "rpl_mi.h"
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#include "rpl_filter.h"
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#include "rpl_utility.h"
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#include "rpl_record.h"
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#include <my_dir.h>
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#endif /* MYSQL_CLIENT */
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#include <base64.h>
#include <my_bitmap.h>
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#define log_cs	&my_charset_latin1
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#define FLAGSTR(V,F) ((V)&(F)?#F" ":"")

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/*
  Size of buffer for printing a double in format %.<PREC>g

  optional '-' + optional zero + '.'  + PREC digits + 'e' + sign +
  exponent digits + '\0'
*/
#define FMT_G_BUFSIZE(PREC) (3 + (PREC) + 5 + 1)


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#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
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static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD* thd);

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static const char *HA_ERR(int i)
{
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  /* 
    This function should only be called in case of an error
    was detected 
   */
  DBUG_ASSERT(i != 0);
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  switch (i) {
  case HA_ERR_KEY_NOT_FOUND: return "HA_ERR_KEY_NOT_FOUND";
  case HA_ERR_FOUND_DUPP_KEY: return "HA_ERR_FOUND_DUPP_KEY";
  case HA_ERR_RECORD_CHANGED: return "HA_ERR_RECORD_CHANGED";
  case HA_ERR_WRONG_INDEX: return "HA_ERR_WRONG_INDEX";
  case HA_ERR_CRASHED: return "HA_ERR_CRASHED";
  case HA_ERR_WRONG_IN_RECORD: return "HA_ERR_WRONG_IN_RECORD";
  case HA_ERR_OUT_OF_MEM: return "HA_ERR_OUT_OF_MEM";
  case HA_ERR_NOT_A_TABLE: return "HA_ERR_NOT_A_TABLE";
  case HA_ERR_WRONG_COMMAND: return "HA_ERR_WRONG_COMMAND";
  case HA_ERR_OLD_FILE: return "HA_ERR_OLD_FILE";
  case HA_ERR_NO_ACTIVE_RECORD: return "HA_ERR_NO_ACTIVE_RECORD";
  case HA_ERR_RECORD_DELETED: return "HA_ERR_RECORD_DELETED";
  case HA_ERR_RECORD_FILE_FULL: return "HA_ERR_RECORD_FILE_FULL";
  case HA_ERR_INDEX_FILE_FULL: return "HA_ERR_INDEX_FILE_FULL";
  case HA_ERR_END_OF_FILE: return "HA_ERR_END_OF_FILE";
  case HA_ERR_UNSUPPORTED: return "HA_ERR_UNSUPPORTED";
  case HA_ERR_TO_BIG_ROW: return "HA_ERR_TO_BIG_ROW";
  case HA_WRONG_CREATE_OPTION: return "HA_WRONG_CREATE_OPTION";
  case HA_ERR_FOUND_DUPP_UNIQUE: return "HA_ERR_FOUND_DUPP_UNIQUE";
  case HA_ERR_UNKNOWN_CHARSET: return "HA_ERR_UNKNOWN_CHARSET";
  case HA_ERR_WRONG_MRG_TABLE_DEF: return "HA_ERR_WRONG_MRG_TABLE_DEF";
  case HA_ERR_CRASHED_ON_REPAIR: return "HA_ERR_CRASHED_ON_REPAIR";
  case HA_ERR_CRASHED_ON_USAGE: return "HA_ERR_CRASHED_ON_USAGE";
  case HA_ERR_LOCK_WAIT_TIMEOUT: return "HA_ERR_LOCK_WAIT_TIMEOUT";
  case HA_ERR_LOCK_TABLE_FULL: return "HA_ERR_LOCK_TABLE_FULL";
  case HA_ERR_READ_ONLY_TRANSACTION: return "HA_ERR_READ_ONLY_TRANSACTION";
  case HA_ERR_LOCK_DEADLOCK: return "HA_ERR_LOCK_DEADLOCK";
  case HA_ERR_CANNOT_ADD_FOREIGN: return "HA_ERR_CANNOT_ADD_FOREIGN";
  case HA_ERR_NO_REFERENCED_ROW: return "HA_ERR_NO_REFERENCED_ROW";
  case HA_ERR_ROW_IS_REFERENCED: return "HA_ERR_ROW_IS_REFERENCED";
  case HA_ERR_NO_SAVEPOINT: return "HA_ERR_NO_SAVEPOINT";
  case HA_ERR_NON_UNIQUE_BLOCK_SIZE: return "HA_ERR_NON_UNIQUE_BLOCK_SIZE";
  case HA_ERR_NO_SUCH_TABLE: return "HA_ERR_NO_SUCH_TABLE";
  case HA_ERR_TABLE_EXIST: return "HA_ERR_TABLE_EXIST";
  case HA_ERR_NO_CONNECTION: return "HA_ERR_NO_CONNECTION";
  case HA_ERR_NULL_IN_SPATIAL: return "HA_ERR_NULL_IN_SPATIAL";
  case HA_ERR_TABLE_DEF_CHANGED: return "HA_ERR_TABLE_DEF_CHANGED";
  case HA_ERR_NO_PARTITION_FOUND: return "HA_ERR_NO_PARTITION_FOUND";
  case HA_ERR_RBR_LOGGING_FAILED: return "HA_ERR_RBR_LOGGING_FAILED";
  case HA_ERR_DROP_INDEX_FK: return "HA_ERR_DROP_INDEX_FK";
  case HA_ERR_FOREIGN_DUPLICATE_KEY: return "HA_ERR_FOREIGN_DUPLICATE_KEY";
  case HA_ERR_TABLE_NEEDS_UPGRADE: return "HA_ERR_TABLE_NEEDS_UPGRADE";
  case HA_ERR_TABLE_READONLY: return "HA_ERR_TABLE_READONLY";
  case HA_ERR_AUTOINC_READ_FAILED: return "HA_ERR_AUTOINC_READ_FAILED";
  case HA_ERR_AUTOINC_ERANGE: return "HA_ERR_AUTOINC_ERANGE";
  case HA_ERR_GENERIC: return "HA_ERR_GENERIC";
  case HA_ERR_RECORD_IS_THE_SAME: return "HA_ERR_RECORD_IS_THE_SAME";
  case HA_ERR_LOGGING_IMPOSSIBLE: return "HA_ERR_LOGGING_IMPOSSIBLE";
  case HA_ERR_CORRUPT_EVENT: return "HA_ERR_CORRUPT_EVENT";
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  case HA_ERR_ROWS_EVENT_APPLY : return "HA_ERR_ROWS_EVENT_APPLY";
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  }
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  return "No Error!";
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}

/**
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   Error reporting facility for Rows_log_event::do_apply_event

   @param level     error, warning or info
   @param ha_error  HA_ERR_ code
   @param rli       pointer to the active Relay_log_info instance
   @param thd       pointer to the slave thread's thd
   @param table     pointer to the event's table object
   @param type      the type of the event
   @param log_name  the master binlog file name
   @param pos       the master binlog file pos (the next after the event)

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*/
static void inline slave_rows_error_report(enum loglevel level, int ha_error,
                                           Relay_log_info const *rli, THD *thd,
                                           TABLE *table, const char * type,
                                           const char *log_name, ulong pos)
{
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  const char *handler_error= (ha_error ? HA_ERR(ha_error) : NULL);
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  char buff[MAX_SLAVE_ERRMSG], *slider;
  const char *buff_end= buff + sizeof(buff);
  uint len;
  List_iterator_fast<MYSQL_ERROR> it(thd->warn_list);
  MYSQL_ERROR *err;
  buff[0]= 0;

  for (err= it++, slider= buff; err && slider < buff_end - 1;
       slider += len, err= it++)
  {
    len= my_snprintf(slider, buff_end - slider,
                     " %s, Error_code: %d;", err->msg, err->code);
  }
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  if (ha_error != 0)
    rli->report(level, thd->is_error() ? thd->main_da.sql_errno() : 0,
                "Could not execute %s event on table %s.%s;"
                "%s handler error %s; "
                "the event's master log %s, end_log_pos %lu",
                type, table->s->db.str, table->s->table_name.str,
                buff, handler_error == NULL ? "<unknown>" : handler_error,
                log_name, pos);
  else
    rli->report(level, thd->is_error() ? thd->main_da.sql_errno() : 0,
                "Could not execute %s event on table %s.%s;"
                "%s the event's master log %s, end_log_pos %lu",
                type, table->s->db.str, table->s->table_name.str,
                buff, log_name, pos);
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}
#endif

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/*
  Cache that will automatically be written to a dedicated file on
  destruction.

  DESCRIPTION

 */
class Write_on_release_cache
{
public:
  enum flag
  {
    FLUSH_F
  };

  typedef unsigned short flag_set;

  /*
    Constructor.

    SYNOPSIS
      Write_on_release_cache
      cache  Pointer to cache to use
      file   File to write cache to upon destruction
      flags  Flags for the cache

    DESCRIPTION

      Class used to guarantee copy of cache to file before exiting the
      current block.  On successful copy of the cache, the cache will
      be reinited as a WRITE_CACHE.

      Currently, a pointer to the cache is provided in the
      constructor, but it would be possible to create a subclass
      holding the IO_CACHE itself.
   */
  Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0)
    : m_cache(cache), m_file(file), m_flags(flags)
  {
    reinit_io_cache(m_cache, WRITE_CACHE, 0L, FALSE, TRUE);
  }

  ~Write_on_release_cache()
  {
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    copy_event_cache_to_file_and_reinit(m_cache, m_file);
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    if (m_flags | FLUSH_F)
      fflush(m_file);
  }

  /*
    Return a pointer to the internal IO_CACHE.

    SYNOPSIS
      operator&()

    DESCRIPTION
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      Function to return a pointer to the internal cache, so that the
      object can be treated as a IO_CACHE and used with the my_b_*
      IO_CACHE functions
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    RETURN VALUE
      A pointer to the internal IO_CACHE.
   */
  IO_CACHE *operator&()
  {
    return m_cache;
  }

private:
  // Hidden, to prevent usage.
  Write_on_release_cache(Write_on_release_cache const&);

  IO_CACHE *m_cache;
  FILE *m_file;
  flag_set m_flags;
};

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#ifndef DBUG_OFF
uint debug_not_change_ts_if_art_event= 1; // bug#29309 simulation
#endif
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/*
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  pretty_print_str()
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*/
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#ifdef MYSQL_CLIENT
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static void pretty_print_str(IO_CACHE* cache, const char* str, int len)
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{
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  const char* end = str + len;
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  my_b_printf(cache, "\'");
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  while (str < end)
  {
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    char c;
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    switch ((c=*str++)) {
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    case '\n': my_b_printf(cache, "\\n"); break;
    case '\r': my_b_printf(cache, "\\r"); break;
    case '\\': my_b_printf(cache, "\\\\"); break;
    case '\b': my_b_printf(cache, "\\b"); break;
    case '\t': my_b_printf(cache, "\\t"); break;
    case '\'': my_b_printf(cache, "\\'"); break;
    case 0   : my_b_printf(cache, "\\0"); break;
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    default:
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      my_b_printf(cache, "%c", c);
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      break;
    }
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  }
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  my_b_printf(cache, "\'");
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}
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#endif /* MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static void clear_all_errors(THD *thd, Relay_log_info *rli)
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{
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  thd->is_slave_error = 0;
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  thd->clear_error();
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  rli->clear_error();
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}

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inline int idempotent_error_code(int err_code)
{
  int ret= 0;

  switch (err_code)
  {
    case 0:
      ret= 1;
    break;
    /*
      The following list of "idempotent" errors
      means that an error from the list might happen
      because of idempotent (more than once)
      applying of a binlog file.
      Notice, that binlog has a  ddl operation its
      second applying may cause

      case HA_ERR_TABLE_DEF_CHANGED:
      case HA_ERR_CANNOT_ADD_FOREIGN:

      which are not included into to the list.

      Note that HA_ERR_RECORD_DELETED is not in the list since
      do_exec_row() should not return that error code.
    */
    case HA_ERR_RECORD_CHANGED:
    case HA_ERR_KEY_NOT_FOUND:
    case HA_ERR_END_OF_FILE:
    case HA_ERR_FOUND_DUPP_KEY:
    case HA_ERR_FOUND_DUPP_UNIQUE:
    case HA_ERR_FOREIGN_DUPLICATE_KEY:
    case HA_ERR_NO_REFERENCED_ROW:
    case HA_ERR_ROW_IS_REFERENCED:
      ret= 1;
    break;
    default:
      ret= 0;
    break;
  }
  return (ret);
}
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/**
  Ignore error code specified on command line.
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*/
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inline int ignored_error_code(int err_code)
{
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#ifdef HAVE_NDB_BINLOG
  /*
    The following error codes are hard-coded and will always be ignored.
  */
  switch (err_code)
  {
  case ER_DB_CREATE_EXISTS:
  case ER_DB_DROP_EXISTS:
    return 1;
  default:
    /* Nothing to do */
    break;
  }
#endif
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  return ((err_code == ER_SLAVE_IGNORED_TABLE) ||
          (use_slave_mask && bitmap_is_set(&slave_error_mask, err_code)));
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}
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/*
  This function converts an engine's error to a server error.
   
  If the thread does not have an error already reported, it tries to 
  define it by calling the engine's method print_error. However, if a 
  mapping is not found, it uses the ER_UNKNOWN_ERROR and prints out a 
  warning message.
*/ 
int convert_handler_error(int error, THD* thd, TABLE *table)
{
  uint actual_error= (thd->is_error() ? thd->main_da.sql_errno() :
                           0);

  if (actual_error == 0)
  {
    table->file->print_error(error, MYF(0));
    actual_error= (thd->is_error() ? thd->main_da.sql_errno() :
                        ER_UNKNOWN_ERROR);
    if (actual_error == ER_UNKNOWN_ERROR)
      if (global_system_variables.log_warnings)
        sql_print_warning("Unknown error detected %d in handler", error);
  }

  return (actual_error);
}
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inline bool concurrency_error_code(int error)
{
  switch (error)
  {
  case ER_LOCK_WAIT_TIMEOUT:
  case ER_LOCK_DEADLOCK:
  case ER_XA_RBDEADLOCK:
    return TRUE;
  default: 
    return (FALSE);
  }
}

inline bool unexpected_error_code(int unexpected_error)
{
  switch (unexpected_error) 
  {
  case ER_NET_READ_ERROR:
  case ER_NET_ERROR_ON_WRITE:
  case ER_QUERY_INTERRUPTED:
  case ER_SERVER_SHUTDOWN:
  case ER_NEW_ABORTING_CONNECTION:
    return(TRUE);
  default:
    return(FALSE);
  }
}

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/*
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  pretty_print_str()
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*/
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static char *pretty_print_str(char *packet, const char *str, int len)
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{
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  const char *end= str + len;
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  char *pos= packet;
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  *pos++= '\'';
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  while (str < end)
  {
    char c;
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    switch ((c=*str++)) {
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    case '\n': *pos++= '\\'; *pos++= 'n'; break;
    case '\r': *pos++= '\\'; *pos++= 'r'; break;
    case '\\': *pos++= '\\'; *pos++= '\\'; break;
    case '\b': *pos++= '\\'; *pos++= 'b'; break;
    case '\t': *pos++= '\\'; *pos++= 't'; break;
    case '\'': *pos++= '\\'; *pos++= '\''; break;
    case 0   : *pos++= '\\'; *pos++= '0'; break;
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    default:
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      *pos++= c;
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      break;
    }
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  }
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  *pos++= '\'';
  return pos;
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}
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#endif /* !MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Creates a temporary name for load data infile:.
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  @param buf		      Store new filename here
  @param file_id	      File_id (part of file name)
  @param event_server_id     Event_id (part of file name)
  @param ext		      Extension for file name
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  @return
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    Pointer to start of extension
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*/
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static char *slave_load_file_stem(char *buf, uint file_id,
                                  int event_server_id, const char *ext)
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{
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  char *res;
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  fn_format(buf,PREFIX_SQL_LOAD,slave_load_tmpdir, "", MY_UNPACK_FILENAME);
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  to_unix_path(buf);

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  buf = strend(buf);
  buf = int10_to_str(::server_id, buf, 10);
  *buf++ = '-';
  buf = int10_to_str(event_server_id, buf, 10);
  *buf++ = '-';
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  res= int10_to_str(file_id, buf, 10);
  strmov(res, ext);                             // Add extension last
  return res;                                   // Pointer to extension
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}
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#endif
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Delete all temporary files used for SQL_LOAD.
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*/
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static void cleanup_load_tmpdir()
{
  MY_DIR *dirp;
  FILEINFO *file;
  uint i;
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  char fname[FN_REFLEN], prefbuf[31], *p;
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  if (!(dirp=my_dir(slave_load_tmpdir,MYF(0))))
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    return;

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  /* 
     When we are deleting temporary files, we should only remove
     the files associated with the server id of our server.
     We don't use event_server_id here because since we've disabled
     direct binlogging of Create_file/Append_file/Exec_load events
     we cannot meet Start_log event in the middle of events from one 
     LOAD DATA.
  */
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  p= strmake(prefbuf, STRING_WITH_LEN(PREFIX_SQL_LOAD));
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  p= int10_to_str(::server_id, p, 10);
  *(p++)= '-';
  *p= 0;

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  for (i=0 ; i < (uint)dirp->number_off_files; i++)
  {
    file=dirp->dir_entry+i;
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    if (is_prefix(file->name, prefbuf))
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    {
      fn_format(fname,file->name,slave_load_tmpdir,"",MY_UNPACK_FILENAME);
      my_delete(fname, MYF(0));
    }
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  }

  my_dirend(dirp);
}
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#endif
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/*
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  write_str()
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*/
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static bool write_str(IO_CACHE *file, const char *str, uint length)
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{
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  uchar tmp[1];
  tmp[0]= (uchar) length;
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  return (my_b_safe_write(file, tmp, sizeof(tmp)) ||
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	  my_b_safe_write(file, (uchar*) str, length));
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}


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/*
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  read_str()
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*/
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static inline int read_str(const char **buf, const char *buf_end,
                           const char **str, uint8 *len)
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{
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  if (*buf + ((uint) (uchar) **buf) >= buf_end)
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    return 1;
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  *len= (uint8) **buf;
  *str= (*buf)+1;
  (*buf)+= (uint) *len+1;
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  return 0;
}

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/**
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  Transforms a string into "" or its expression in 0x... form.
*/
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char *str_to_hex(char *to, const char *from, uint len)
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{
  if (len)
  {
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    *to++= '0';
    *to++= 'x';
    to= octet2hex(to, from, len);
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  }
  else
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    to= strmov(to, "\"\"");
  return to;                               // pointer to end 0 of 'to'
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}

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#ifndef MYSQL_CLIENT

/**
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  Append a version of the 'from' string suitable for use in a query to
  the 'to' string.  To generate a correct escaping, the character set
  information in 'csinfo' is used.
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*/

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int
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append_query_string(THD *thd, CHARSET_INFO *csinfo,
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                    String const *from, String *to)
{
  char *beg, *ptr;
  uint32 const orig_len= to->length();
  if (to->reserve(orig_len + from->length()*2+3))
    return 1;

  beg= to->c_ptr_quick() + to->length();
  ptr= beg;
  if (csinfo->escape_with_backslash_is_dangerous)
    ptr= str_to_hex(ptr, from->ptr(), from->length());
  else
  {
    *ptr++= '\'';
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    if (!(thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES))
    {
      ptr+= escape_string_for_mysql(csinfo, ptr, 0,
                                    from->ptr(), from->length());
    }
    else
    {
      const char *frm_str= from->ptr();

      for (; frm_str < (from->ptr() + from->length()); frm_str++)
      {
        /* Using '' way to represent "'" */
        if (*frm_str == '\'')
          *ptr++= *frm_str;

        *ptr++= *frm_str;
      }
    }

    *ptr++= '\'';
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  }
  to->length(orig_len + ptr - beg);
  return 0;
}
#endif

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/**
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  Prints a "session_var=value" string. Used by mysqlbinlog to print some SET
  commands just before it prints a query.
*/

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#ifdef MYSQL_CLIENT
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static void print_set_option(IO_CACHE* file, uint32 bits_changed,
                             uint32 option, uint32 flags, const char* name,
                             bool* need_comma)
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{
  if (bits_changed & option)
  {
    if (*need_comma)
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      my_b_printf(file,", ");
    my_b_printf(file,"%s=%d", name, test(flags & option));
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    *need_comma= 1;
  }
}
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#endif
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/**************************************************************************
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	Log_event methods (= the parent class of all events)
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**************************************************************************/
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/**
  @return
  returns the human readable name of the event's type
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*/
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const char* Log_event::get_type_str(Log_event_type type)
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{
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  switch(type) {
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  case START_EVENT_V3:  return "Start_v3";
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  case STOP_EVENT:   return "Stop";
  case QUERY_EVENT:  return "Query";
  case ROTATE_EVENT: return "Rotate";
  case INTVAR_EVENT: return "Intvar";
  case LOAD_EVENT:   return "Load";
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  case NEW_LOAD_EVENT:   return "New_load";
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  case SLAVE_EVENT:  return "Slave";
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  case CREATE_FILE_EVENT: return "Create_file";
  case APPEND_BLOCK_EVENT: return "Append_block";
  case DELETE_FILE_EVENT: return "Delete_file";
  case EXEC_LOAD_EVENT: return "Exec_load";
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  case RAND_EVENT: return "RAND";
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  case XID_EVENT: return "Xid";
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  case USER_VAR_EVENT: return "User var";
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  case FORMAT_DESCRIPTION_EVENT: return "Format_desc";
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  case TABLE_MAP_EVENT: return "Table_map";
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  case PRE_GA_WRITE_ROWS_EVENT: return "Write_rows_event_old";
  case PRE_GA_UPDATE_ROWS_EVENT: return "Update_rows_event_old";
  case PRE_GA_DELETE_ROWS_EVENT: return "Delete_rows_event_old";
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  case WRITE_ROWS_EVENT: return "Write_rows";
  case UPDATE_ROWS_EVENT: return "Update_rows";
  case DELETE_ROWS_EVENT: return "Delete_rows";
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  case BEGIN_LOAD_QUERY_EVENT: return "Begin_load_query";
  case EXECUTE_LOAD_QUERY_EVENT: return "Execute_load_query";
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  case INCIDENT_EVENT: return "Incident";
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  default: return "Unknown";				/* impossible */
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  }
}

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const char* Log_event::get_type_str()
{
  return get_type_str(get_type_code());
}

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/*
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  Log_event::Log_event()
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*/
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#ifndef MYSQL_CLIENT
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Log_event::Log_event(THD* thd_arg, uint16 flags_arg, bool using_trans)
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  :log_pos(0), temp_buf(0), exec_time(0), flags(flags_arg), thd(thd_arg)
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{
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  server_id=	thd->server_id;
  when=		thd->start_time;
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  cache_stmt=	using_trans;
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}


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/**
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  This minimal constructor is for when you are not even sure that there
  is a valid THD. For example in the server when we are shutting down or
  flushing logs after receiving a SIGHUP (then we must write a Rotate to
  the binlog but we have no THD, so we need this minimal constructor).
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*/

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Log_event::Log_event()
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  :temp_buf(0), exec_time(0), flags(0), cache_stmt(0),
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   thd(0)
{
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  server_id=	::server_id;
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  /*
    We can't call my_time() here as this would cause a call before
    my_init() is called
  */
  when=		0;
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  log_pos=	0;
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}
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#endif /* !MYSQL_CLIENT */
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/*
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  Log_event::Log_event()
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*/
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Log_event::Log_event(const char* buf,
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                     const Format_description_log_event* description_event)
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  :temp_buf(0), cache_stmt(0)
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{
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#ifndef MYSQL_CLIENT
  thd = 0;
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#endif
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  when = uint4korr(buf);
  server_id = uint4korr(buf + SERVER_ID_OFFSET);
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  data_written= uint4korr(buf + EVENT_LEN_OFFSET);
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  if (description_event->binlog_version==1)
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  {
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    log_pos= 0;
    flags= 0;
    return;
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  }
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  /* 4.0 or newer */
  log_pos= uint4korr(buf + LOG_POS_OFFSET);
  /*
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    If the log is 4.0 (so here it can only be a 4.0 relay log read by
    the SQL thread or a 4.0 master binlog read by the I/O thread),
    log_pos is the beginning of the event: we transform it into the end
    of the event, which is more useful.
    But how do you know that the log is 4.0: you know it if
    description_event is version 3 *and* you are not reading a
    Format_desc (remember that mysqlbinlog starts by assuming that 5.0
    logs are in 4.0 format, until it finds a Format_desc).
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  */
  if (description_event->binlog_version==3 &&
      buf[EVENT_TYPE_OFFSET]<FORMAT_DESCRIPTION_EVENT && log_pos)
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  {
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      /*
        If log_pos=0, don't change it. log_pos==0 is a marker to mean
        "don't change rli->group_master_log_pos" (see
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        inc_group_relay_log_pos()). As it is unreal log_pos, adding the
        event len's is nonsense. For example, a fake Rotate event should
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        not have its log_pos (which is 0) changed or it will modify
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        Exec_master_log_pos in SHOW SLAVE STATUS, displaying a nonsense
        value of (a non-zero offset which does not exist in the master's
        binlog, so which will cause problems if the user uses this value
        in CHANGE MASTER).
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      */
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    log_pos+= data_written; /* purecov: inspected */
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  }
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  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

  flags= uint2korr(buf + FLAGS_OFFSET);
  if ((buf[EVENT_TYPE_OFFSET] == FORMAT_DESCRIPTION_EVENT) ||
      (buf[EVENT_TYPE_OFFSET] == ROTATE_EVENT))
  {
    /*
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      These events always have a header which stops here (i.e. their
      header is FROZEN).
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    */
    /*
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      Initialization to zero of all other Log_event members as they're
      not specified. Currently there are no such members; in the future
      there will be an event UID (but Format_description and Rotate
      don't need this UID, as they are not propagated through
      --log-slave-updates (remember the UID is used to not play a query
      twice when you have two masters which are slaves of a 3rd master).
      Then we are done.
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    */
    return;
  }
  /* otherwise, go on with reading the header from buf (nothing now) */
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}

#ifndef MYSQL_CLIENT
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#ifdef HAVE_REPLICATION
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int Log_event::do_update_pos(Relay_log_info *rli)
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{
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  /*
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    rli is null when (as far as I (Guilhem) know) the caller is
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    Load_log_event::do_apply_event *and* that one is called from
    Execute_load_log_event::do_apply_event.  In this case, we don't
    do anything here ; Execute_load_log_event::do_apply_event will
    call Log_event::do_apply_event again later with the proper rli.
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    Strictly speaking, if we were sure that rli is null only in the
    case discussed above, 'if (rli)' is useless here.  But as we are
    not 100% sure, keep it for now.
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    Matz: I don't think we will need this check with this refactoring.
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  */
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  if (rli)
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  {
    /*
      bug#29309 simulation: resetting the flag to force
      wrong behaviour of artificial event to update
      rli->last_master_timestamp for only one time -
      the first FLUSH LOGS in the test.
    */
    DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
                    if (debug_not_change_ts_if_art_event == 1
                        && is_artificial_event())
                    {
                      debug_not_change_ts_if_art_event= 0;
                    });
#ifndef DBUG_OFF
    rli->stmt_done(log_pos, 
                   is_artificial_event() &&
                   debug_not_change_ts_if_art_event > 0 ? 0 : when);
#else
    rli->stmt_done(log_pos, is_artificial_event()? 0 : when);
#endif
    DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
                    if (debug_not_change_ts_if_art_event == 0)
                    {
                      debug_not_change_ts_if_art_event= 2;
                    });
  }
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  return 0;                                   // Cannot fail currently
}
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Log_event::enum_skip_reason
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Log_event::do_shall_skip(Relay_log_info *rli)
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{
  DBUG_PRINT("info", ("ev->server_id=%lu, ::server_id=%lu,"
                      " rli->replicate_same_server_id=%d,"
                      " rli->slave_skip_counter=%d",
                      (ulong) server_id, (ulong) ::server_id,
                      rli->replicate_same_server_id,
                      rli->slave_skip_counter));
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  if ((server_id == ::server_id && !rli->replicate_same_server_id) ||
      (rli->slave_skip_counter == 1 && rli->is_in_group()))
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    return EVENT_SKIP_IGNORE;
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  else if (rli->slave_skip_counter > 0)
    return EVENT_SKIP_COUNT;
  else
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    return EVENT_SKIP_NOT;
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}
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/*
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  Log_event::pack_info()
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*/
864

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void Log_event::pack_info(Protocol *protocol)
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{
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  protocol->store("", &my_charset_bin);
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}


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/**
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  Only called by SHOW BINLOG EVENTS
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*/
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int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos)
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{
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  const char *p= strrchr(log_name, FN_LIBCHAR);
  const char *event_type;
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  if (p)
    log_name = p + 1;
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  protocol->prepare_for_resend();
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  protocol->store(log_name, &my_charset_bin);
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  protocol->store((ulonglong) pos);
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  event_type = get_type_str();
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  protocol->store(event_type, strlen(event_type), &my_charset_bin);
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  protocol->store((uint32) server_id);
  protocol->store((ulonglong) log_pos);
  pack_info(protocol);
  return protocol->write();
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}
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#endif /* HAVE_REPLICATION */


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/**
  init_show_field_list() prepares the column names and types for the
  output of SHOW BINLOG EVENTS; it is used only by SHOW BINLOG
  EVENTS.
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*/
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void Log_event::init_show_field_list(List<Item>* field_list)
{
  field_list->push_back(new Item_empty_string("Log_name", 20));
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  field_list->push_back(new Item_return_int("Pos", MY_INT32_NUM_DECIMAL_DIGITS,
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					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Event_type", 20));
  field_list->push_back(new Item_return_int("Server_id", 10,
					    MYSQL_TYPE_LONG));
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  field_list->push_back(new Item_return_int("End_log_pos",
                                            MY_INT32_NUM_DECIMAL_DIGITS,
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					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Info", 20));
}

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/*
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  Log_event::write()
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*/
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bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
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  uchar header[LOG_EVENT_HEADER_LEN];
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  ulong now;
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  DBUG_ENTER("Log_event::write_header");
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  /* Store number of bytes that will be written by this event */
  data_written= event_data_length + sizeof(header);
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  /*
    log_pos != 0 if this is relay-log event. In this case we should not
    change the position
  */
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  if (is_artificial_event())
  {
    /*
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      Artificial events are automatically generated and do not exist
      in master's binary log, so log_pos should be set to 0.
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    */
    log_pos= 0;
  }
  else  if (!log_pos)
  {
    /*
      Calculate position of end of event

      Note that with a SEQ_READ_APPEND cache, my_b_tell() does not
      work well.  So this will give slightly wrong positions for the
      Format_desc/Rotate/Stop events which the slave writes to its
      relay log. For example, the initial Format_desc will have
      end_log_pos=91 instead of 95. Because after writing the first 4
      bytes of the relay log, my_b_tell() still reports 0. Because
      my_b_append() does not update the counter which my_b_tell()
      later uses (one should probably use my_b_append_tell() to work
      around this).  To get right positions even when writing to the
      relay log, we use the (new) my_b_safe_tell().

      Note that this raises a question on the correctness of all these
      DBUG_ASSERT(my_b_tell()=rli->event_relay_log_pos).

      If in a transaction, the log_pos which we calculate below is not
      very good (because then my_b_safe_tell() returns start position
      of the BEGIN, so it's like the statement was at the BEGIN's
      place), but it's not a very serious problem (as the slave, when
      it is in a transaction, does not take those end_log_pos into
      account (as it calls inc_event_relay_log_pos()). To be fixed
      later, so that it looks less strange. But not bug.
    */

    log_pos= my_b_safe_tell(file)+data_written;
  }

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  now= (ulong) get_time();                              // Query start time
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  /*
    Header will be of size LOG_EVENT_HEADER_LEN for all events, except for
    FORMAT_DESCRIPTION_EVENT and ROTATE_EVENT, where it will be
    LOG_EVENT_MINIMAL_HEADER_LEN (remember these 2 have a frozen header,
    because we read them before knowing the format).
  */

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  int4store(header, now);              // timestamp
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  header[EVENT_TYPE_OFFSET]= get_type_code();
  int4store(header+ SERVER_ID_OFFSET, server_id);
  int4store(header+ EVENT_LEN_OFFSET, data_written);
  int4store(header+ LOG_POS_OFFSET, log_pos);
  int2store(header+ FLAGS_OFFSET, flags);

  DBUG_RETURN(my_b_safe_write(file, header, sizeof(header)) != 0);
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}


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/**
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  This needn't be format-tolerant, because we only read
  LOG_EVENT_MINIMAL_HEADER_LEN (we just want to read the event's length).
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*/
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int Log_event::read_log_event(IO_CACHE* file, String* packet,
998
			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
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  int result=0;
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  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
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  DBUG_ENTER("Log_event::read_log_event");
1004

1005
  if (log_lock)
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    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (uchar*) buf, sizeof(buf)))
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  {
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    /*
      If the read hits eof, we must report it as eof so the caller
      will know it can go into cond_wait to be woken up on the next
      update to the log.
    */
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    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
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      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
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    goto end;
1020
  }
1021
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
1022
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
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  {
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    DBUG_PRINT("error",("data_len: %ld", data_len));
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    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
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	     LOG_READ_TOO_LARGE);
    goto end;
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  }
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  /* Append the log event header to packet */
  if (packet->append(buf, sizeof(buf)))
  {
    /* Failed to allocate packet */
    result= LOG_READ_MEM;
    goto end;
  }
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  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
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  if (data_len)
  {
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    /* Append rest of event, read directly from file into packet */
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    if (packet->append(file, data_len))
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    {
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      /*
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        Fatal error occured when appending rest of the event
        to packet, possible failures:
	1. EOF occured when reading from file, it's really an error
           as data_len is >=0 there's supposed to be more bytes available.
           file->error will have been set to number of bytes left to read
        2. Read was interrupted, file->error would normally be set to -1
        3. Failed to allocate memory for packet, my_errno
           will be ENOMEM(file->error shuold be 0, but since the
           memory allocation occurs before the call to read it might
           be uninitialized)
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      */
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      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
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      /* Implicit goto end; */
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    }
1060
  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
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  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
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#else
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#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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#ifndef MYSQL_CLIENT
/**
  @note
1080
    Allocates memory;  The caller is responsible for clean-up.
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*/
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
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                                     const Format_description_log_event
                                     *description_event)
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#else
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Log_event* Log_event::read_log_event(IO_CACHE* file,
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                                     const Format_description_log_event
                                     *description_event)
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#endif
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{
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  DBUG_ENTER("Log_event::read_log_event");
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  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
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1105
  LOCK_MUTEX;
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  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
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  if (my_b_read(file, (uchar *) head, header_size))
1108
  {
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    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
1112
    /*
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      No error here; it could be that we are at the file's end. However
      if the next my_b_read() fails (below), it will be an error as we
      were able to read the first bytes.
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    */
1117
    DBUG_RETURN(0);
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  }
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  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
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  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;
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#ifndef max_allowed_packet
  THD *thd=current_thd;
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  uint max_allowed_packet= thd ? slave_max_allowed_packet:~(ulong)0;
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#endif
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  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

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  if (data_len < header_size)
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  {
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    error = "Event too small";
    goto err;
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  }
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  // some events use the extra byte to null-terminate strings
1141
  if (!(buf = (char*) my_malloc(data_len+1, MYF(MY_WME))))
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  {
    error = "Out of memory";
    goto err;
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  }
1146
  buf[data_len] = 0;
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  memcpy(buf, head, header_size);
1148
  if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
1153
  if ((res= read_log_event(buf, data_len, &error, description_event)))
1154
    res->register_temp_buf(buf);
1155

1156
err:
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  UNLOCK_MUTEX;
1158
  if (!res)
1159
  {
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    DBUG_ASSERT(error != 0);
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    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
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		    error,data_len,head[EVENT_TYPE_OFFSET]);
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    my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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    /*
      The SQL slave thread will check if file->error<0 to know
      if there was an I/O error. Even if there is no "low-level" I/O errors
      with 'file', any of the high-level above errors is worrying
      enough to stop the SQL thread now ; as we are skipping the current event,
      going on with reading and successfully executing other events can
      only corrupt the slave's databases. So stop.
    */
    file->error= -1;
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  }
1175
  DBUG_RETURN(res);
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}

1178

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/**
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
1183

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Log_event* Log_event::read_log_event(const char* buf, uint event_len,
				     const char **error,
                                     const Format_description_log_event *description_event)
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{
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  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
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  DBUG_ASSERT(description_event != 0);
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  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
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  DBUG_DUMP("data", (unsigned char*) buf, event_len);

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  /* Check the integrity */
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  if (event_len < EVENT_LEN_OFFSET ||
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      buf[EVENT_TYPE_OFFSET] >= ENUM_END_EVENT ||
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      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
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  }
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  uint event_type= buf[EVENT_TYPE_OFFSET];
  if (event_type > description_event->number_of_event_types &&
      event_type != FORMAT_DESCRIPTION_EVENT)
  {
    /*
      It is unsafe to use the description_event if its post_header_len
      array does not include the event type.
    */
    DBUG_PRINT("error", ("event type %d found, but the current "
                         "Format_description_log_event supports only %d event "
                         "types", event_type,
                         description_event->number_of_event_types));
    ev= NULL;
  }
  else
  {
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    /*
      In some previuos versions (see comment in
      Format_description_log_event::Format_description_log_event(char*,...)),
      event types were assigned different id numbers than in the
      present version. In order to replicate from such versions to the
      present version, we must map those event type id's to our event
      type id's.  The mapping is done with the event_type_permutation
      array, which was set up when the Format_description_log_event
      was read.
    */
    if (description_event->event_type_permutation)
    {
      IF_DBUG({
          int new_event_type=
            description_event->event_type_permutation[event_type];
          DBUG_PRINT("info",
                     ("converting event type %d to %d (%s)",
                      event_type, new_event_type,
                      get_type_str((Log_event_type)new_event_type)));
        });
      event_type= description_event->event_type_permutation[event_type];
    }

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    switch(event_type) {
    case QUERY_EVENT:
      ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
      break;
    case LOAD_EVENT:
      ev = new Load_log_event(buf, event_len, description_event);
      break;
    case NEW_LOAD_EVENT:
      ev = new Load_log_event(buf, event_len, description_event);
      break;
    case ROTATE_EVENT:
      ev = new Rotate_log_event(buf, event_len, description_event);
      break;
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#ifdef HAVE_REPLICATION
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    case SLAVE_EVENT: /* can never happen (unused event) */
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      ev = new Slave_log_event(buf, event_len, description_event);
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      break;
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#endif /* HAVE_REPLICATION */
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    case CREATE_FILE_EVENT:
      ev = new Create_file_log_event(buf, event_len, description_event);
      break;
    case APPEND_BLOCK_EVENT:
      ev = new Append_block_log_event(buf, event_len, description_event);
      break;
    case DELETE_FILE_EVENT:
      ev = new Delete_file_log_event(buf, event_len, description_event);
      break;
    case EXEC_LOAD_EVENT:
      ev = new Execute_load_log_event(buf, event_len, description_event);
      break;
    case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
      ev = new Start_log_event_v3(buf, description_event);
      break;
    case STOP_EVENT:
      ev = new Stop_log_event(buf, description_event);
      break;
    case INTVAR_EVENT:
      ev = new Intvar_log_event(buf, description_event);
      break;
    case XID_EVENT:
      ev = new Xid_log_event(buf, description_event);
      break;
    case RAND_EVENT:
      ev = new Rand_log_event(buf, description_event);
      break;
    case USER_VAR_EVENT:
      ev = new User_var_log_event(buf, description_event);
      break;
    case FORMAT_DESCRIPTION_EVENT:
      ev = new Format_description_log_event(buf, event_len, description_event);
      break;
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#if defined(HAVE_REPLICATION) 
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    case PRE_GA_WRITE_ROWS_EVENT:
      ev = new Write_rows_log_event_old(buf, event_len, description_event);
      break;
    case PRE_GA_UPDATE_ROWS_EVENT:
      ev = new Update_rows_log_event_old(buf, event_len, description_event);
      break;
    case PRE_GA_DELETE_ROWS_EVENT:
      ev = new Delete_rows_log_event_old(buf, event_len, description_event);
      break;
    case WRITE_ROWS_EVENT:
      ev = new Write_rows_log_event(buf, event_len, description_event);
      break;
    case UPDATE_ROWS_EVENT:
      ev = new Update_rows_log_event(buf, event_len, description_event);
      break;
    case DELETE_ROWS_EVENT:
      ev = new Delete_rows_log_event(buf, event_len, description_event);
      break;
    case TABLE_MAP_EVENT:
      ev = new Table_map_log_event(buf, event_len, description_event);
      break;
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#endif
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    case BEGIN_LOAD_QUERY_EVENT:
      ev = new Begin_load_query_log_event(buf, event_len, description_event);
      break;
    case EXECUTE_LOAD_QUERY_EVENT:
      ev= new Execute_load_query_log_event(buf, event_len, description_event);
      break;
    case INCIDENT_EVENT:
      ev = new Incident_log_event(buf, event_len, description_event);
      break;
    default:
      DBUG_PRINT("error",("Unknown event code: %d",
                          (int) buf[EVENT_TYPE_OFFSET]));
      ev= NULL;
      break;
    }
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  }
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  DBUG_PRINT("read_event", ("%s(type_code: %d; event_len: %d)",
                            ev ? ev->get_type_str() : "<unknown>",
                            buf[EVENT_TYPE_OFFSET],
                            event_len));
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  /*
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    is_valid() are small event-specific sanity tests which are
    important; for example there are some my_malloc() in constructors
    (e.g. Query_log_event::Query_log_event(char*...)); when these
    my_malloc() fail we can't return an error out of the constructor
    (because constructor is "void") ; so instead we leave the pointer we
    wanted to allocate (e.g. 'query') to 0 and we test it in is_valid().
    Same for Format_description_log_event, member 'post_header_len'.
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    SLAVE_EVENT is never used, so it should not be read ever.
1347
  */
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  if (!ev || !ev->is_valid() || (event_type == SLAVE_EVENT))
1349
  {
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    DBUG_PRINT("error",("Found invalid event in binary log"));

1352
    delete ev;
1353
#ifdef MYSQL_CLIENT
1354
    if (!force_opt) /* then mysqlbinlog dies */
1355 1356
    {
      *error= "Found invalid event in binary log";
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      DBUG_RETURN(0);
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    }
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    ev= new Unknown_log_event(buf, description_event);
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#else
    *error= "Found invalid event in binary log";
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    DBUG_RETURN(0);
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#endif
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  }
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  DBUG_RETURN(ev);  
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}

1368
#ifdef MYSQL_CLIENT
1369

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/*
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  Log_event::print_header()
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*/
1373

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void Log_event::print_header(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool is_more __attribute__((unused)))
1377
{
1378
  char llbuff[22];
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  my_off_t hexdump_from= print_event_info->hexdump_from;
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  DBUG_ENTER("Log_event::print_header");
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  my_b_printf(file, "#");
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  print_timestamp(file);
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  my_b_printf(file, " server id %lu  end_log_pos %s ", (ulong) server_id,
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              llstr(log_pos,llbuff));
1386

1387
  /* mysqlbinlog --hexdump */
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  if (print_event_info->hexdump_from)
1389
  {
1390
    my_b_printf(file, "\n");
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    uchar *ptr= (uchar*)temp_buf;
    my_off_t size=
      uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
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    my_off_t i;

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    /* Header len * 4 >= header len * (2 chars + space + extra space) */
    char *h, hex_string[LOG_EVENT_MINIMAL_HEADER_LEN*4]= {0};
    char *c, char_string[16+1]= {0};

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    /* Pretty-print event common header if header is exactly 19 bytes */
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    if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
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    {
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      char emit_buf[256];               // Enough for storing one line
      my_b_printf(file, "# Position  Timestamp   Type   Master ID        "
                  "Size      Master Pos    Flags \n");
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      size_t const bytes_written=
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        my_snprintf(emit_buf, sizeof(emit_buf),
                    "# %8.8lx %02x %02x %02x %02x   %02x   "
                    "%02x %02x %02x %02x   %02x %02x %02x %02x   "
                    "%02x %02x %02x %02x   %02x %02x\n",
                    (unsigned long) hexdump_from,
                    ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], ptr[6],
                    ptr[7], ptr[8], ptr[9], ptr[10], ptr[11], ptr[12], ptr[13],
                    ptr[14], ptr[15], ptr[16], ptr[17], ptr[18]);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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      ptr += LOG_EVENT_MINIMAL_HEADER_LEN;
      hexdump_from += LOG_EVENT_MINIMAL_HEADER_LEN;
    }
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    /* Rest of event (without common header) */
    for (i= 0, c= char_string, h=hex_string;
	 i < size;
	 i++, ptr++)
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    {
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      my_snprintf(h, 4, "%02x ", *ptr);
      h += 3;
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1429
      *c++= my_isalnum(&my_charset_bin, *ptr) ? *ptr : '.';
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      if (i % 16 == 15)
      {
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        /*
          my_b_printf() does not support full printf() formats, so we
          have to do it this way.

          TODO: Rewrite my_b_printf() to support full printf() syntax.
         */
        char emit_buf[256];
1440
        size_t const bytes_written=
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          my_snprintf(emit_buf, sizeof(emit_buf),
                      "# %8.8lx %-48.48s |%16s|\n",
                      (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                      hex_string, char_string);
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        DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
	my_b_write(file, (uchar*) emit_buf, bytes_written);
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	hex_string[0]= 0;
	char_string[0]= 0;
	c= char_string;
	h= hex_string;
1451
      }
1452
      else if (i % 8 == 7) *h++ = ' ';
1453
    }
1454
    *c= '\0';
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    if (hex_string[0])
1457 1458
    {
      char emit_buf[256];
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      size_t const bytes_written=
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        my_snprintf(emit_buf, sizeof(emit_buf),
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                    "# %8.8lx %-48.48s |%s|\n",
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                    (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                    hex_string, char_string);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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    }
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    /*
      need a # to prefix the rest of printouts for example those of
      Rows_log_event::print_helper().
    */
1471
    my_b_write(file, reinterpret_cast<const uchar*>("# "), 2);
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  }
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  DBUG_VOID_RETURN;
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}

1476

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/**
  Prints a quoted string to io cache.
  Control characters are displayed as hex sequence, e.g. \x00
  
  @param[in] file              IO cache
  @param[in] prt               Pointer to string
  @param[in] length            String length
*/

static void
my_b_write_quoted(IO_CACHE *file, const uchar *ptr, uint length)
{
  const uchar *s;
  my_b_printf(file, "'");
  for (s= ptr; length > 0 ; s++, length--)
  {
    if (*s > 0x1F)
      my_b_write(file, s, 1);
    else
    {
      uchar hex[10];
      size_t len= my_snprintf((char*) hex, sizeof(hex), "%s%02x", "\\x", *s);
      my_b_write(file, hex, len);
    }
  }
  my_b_printf(file, "'");
}


/**
  Prints a bit string to io cache in format  b'1010'.
  
  @param[in] file              IO cache
  @param[in] ptr               Pointer to string
  @param[in] nbits             Number of bits
*/
static void
my_b_write_bit(IO_CACHE *file, const uchar *ptr, uint nbits)
{
  uint bitnum, nbits8= ((nbits + 7) / 8) * 8, skip_bits= nbits8 - nbits;
  my_b_printf(file, "b'");
  for (bitnum= skip_bits ; bitnum < nbits8; bitnum++)
  {
    int is_set= (ptr[(bitnum) / 8] >> (7 - bitnum % 8))  & 0x01;
    my_b_write(file, (const uchar*) (is_set ? "1" : "0"), 1);
  }
  my_b_printf(file, "'");
}


/**
  Prints a packed string to io cache.
  The string consists of length packed to 1 or 2 bytes,
  followed by string data itself.
  
  @param[in] file              IO cache
  @param[in] ptr               Pointer to string
  @param[in] length            String size
  
  @retval   - number of bytes scanned.
*/
static size_t
my_b_write_quoted_with_length(IO_CACHE *file, const uchar *ptr, uint length)
{
  if (length < 256)
  {
    length= *ptr;
    my_b_write_quoted(file, ptr + 1, length);
    return length + 1;
  }
  else
  {
    length= uint2korr(ptr);
    my_b_write_quoted(file, ptr + 2, length);
    return length + 2;
  }
}


/**
  Prints a 32-bit number in both signed and unsigned representation
  
  @param[in] file              IO cache
  @param[in] sl                Signed number
  @param[in] ul                Unsigned number
*/
static void
my_b_write_sint32_and_uint32(IO_CACHE *file, int32 si, uint32 ui)
{
  my_b_printf(file, "%d", si);
  if (si < 0)
    my_b_printf(file, " (%u)", ui);
}


/**
  Print a packed value of the given SQL type into IO cache
  
  @param[in] file              IO cache
  @param[in] ptr               Pointer to string
  @param[in] type              Column type
  @param[in] meta              Column meta information
  @param[out] typestr          SQL type string buffer (for verbose output)
  @param[out] typestr_length   Size of typestr
  
  @retval   - number of bytes scanned from ptr.
*/

static size_t
log_event_print_value(IO_CACHE *file, const uchar *ptr,
                      uint type, uint meta,
                      char *typestr, size_t typestr_length)
{
  uint32 length= 0;

  if (type == MYSQL_TYPE_STRING)
  {
    if (meta >= 256)
    {
      uint byte0= meta >> 8;
      uint byte1= meta & 0xFF;
      
      if ((byte0 & 0x30) != 0x30)
      {
        /* a long CHAR() field: see #37426 */
        length= byte1 | (((byte0 & 0x30) ^ 0x30) << 4);
        type= byte0 | 0x30;
        goto beg;
      }

      switch (byte0)
      {
        case MYSQL_TYPE_SET:
        case MYSQL_TYPE_ENUM:
        case MYSQL_TYPE_STRING:
          type= byte0;
          length= byte1;
          break;

        default:

        {
          char tmp[5];
          my_snprintf(tmp, sizeof(tmp), "%04X", meta);
          my_b_printf(file,
                      "!! Don't know how to handle column type=%d meta=%d (%s)",
                      type, meta, tmp);
          return 0;
        }
      }
    }
    else
      length= meta;
  }


beg:
  
  switch (type) {
  case MYSQL_TYPE_LONG:
    {
      int32 si= sint4korr(ptr);
      uint32 ui= uint4korr(ptr);
      my_b_write_sint32_and_uint32(file, si, ui);
      my_snprintf(typestr, typestr_length, "INT");
      return 4;
    }

  case MYSQL_TYPE_TINY:
    {
      my_b_write_sint32_and_uint32(file, (int) (signed char) *ptr,
                                  (uint) (unsigned char) *ptr);
      my_snprintf(typestr, typestr_length, "TINYINT");
      return 1;
    }

  case MYSQL_TYPE_SHORT:
    {
      int32 si= (int32) sint2korr(ptr);
      uint32 ui= (uint32) uint2korr(ptr);
      my_b_write_sint32_and_uint32(file, si, ui);
      my_snprintf(typestr, typestr_length, "SHORTINT");
      return 2;
    }
  
  case MYSQL_TYPE_INT24:
    {
      int32 si= sint3korr(ptr);
      uint32 ui= uint3korr(ptr);
      my_b_write_sint32_and_uint32(file, si, ui);
      my_snprintf(typestr, typestr_length, "MEDIUMINT");
      return 3;
    }

  case MYSQL_TYPE_LONGLONG:
    {
      char tmp[64];
      longlong si= sint8korr(ptr);
      longlong10_to_str(si, tmp, -10);
      my_b_printf(file, "%s", tmp);
      if (si < 0)
      {
        ulonglong ui= uint8korr(ptr);
        longlong10_to_str((longlong) ui, tmp, 10);
        my_b_printf(file, " (%s)", tmp);        
      }
      my_snprintf(typestr, typestr_length, "LONGINT");
      return 8;
    }

  case MYSQL_TYPE_NEWDECIMAL:
    {
      uint precision= meta >> 8;
      uint decimals= meta & 0xFF;
      uint bin_size= my_decimal_get_binary_size(precision, decimals);
      my_decimal dec;
      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) ptr, &dec,
                        precision, decimals);
      int i, end;
      char buff[512], *pos;
      pos= buff;
1698
      pos+= sprintf(buff, "%s", dec.sign() ? "-" : "");
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      end= ROUND_UP(dec.frac) + ROUND_UP(dec.intg)-1;
      for (i=0; i < end; i++)
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        pos+= sprintf(pos, "%09d.", dec.buf[i]);
      pos+= sprintf(pos, "%09d", dec.buf[i]);
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      my_b_printf(file, "%s", buff);
      my_snprintf(typestr, typestr_length, "DECIMAL(%d,%d)",
                  precision, decimals);
      return bin_size;
    }
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  case MYSQL_TYPE_FLOAT:
    {
      float fl;
      float4get(fl, ptr);
      char tmp[320];
      sprintf(tmp, "%-20g", (double) fl);
      my_b_printf(file, "%s", tmp); /* my_snprintf doesn't support %-20g */
      my_snprintf(typestr, typestr_length, "FLOAT");
      return 4;
    }

  case MYSQL_TYPE_DOUBLE:
    {
      double dbl;
1723
      float8get(dbl, ptr);
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      char tmp[320];
      sprintf(tmp, "%-.20g", dbl); /* my_snprintf doesn't support %-20g */
      my_b_printf(file, "%s", tmp);
      strcpy(typestr, "DOUBLE");
      return 8;
    }
  
  case MYSQL_TYPE_BIT:
    {
      /* Meta-data: bit_len, bytes_in_rec, 2 bytes */
      uint nbits= ((meta >> 8) * 8) + (meta & 0xFF);
      length= (nbits + 7) / 8;
      my_b_write_bit(file, ptr, nbits);
      my_snprintf(typestr, typestr_length, "BIT(%d)", nbits);
      return length;
    }

  case MYSQL_TYPE_TIMESTAMP:
    {
      uint32 i32= uint4korr(ptr);
      my_b_printf(file, "%d", i32);
      my_snprintf(typestr, typestr_length, "TIMESTAMP");
      return 4;
    }

  case MYSQL_TYPE_DATETIME:
    {
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      size_t d, t;
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      uint64 i64= uint8korr(ptr); /* YYYYMMDDhhmmss */
      d= i64 / 1000000;
      t= i64 % 1000000;
      my_b_printf(file, "%04d-%02d-%02d %02d:%02d:%02d",
                  d / 10000, (d % 10000) / 100, d % 100,
                  t / 10000, (t % 10000) / 100, t % 100);
      my_snprintf(typestr, typestr_length, "DATETIME");
      return 8;
    }

  case MYSQL_TYPE_TIME:
    {
      uint32 i32= uint3korr(ptr);
      my_b_printf(file, "'%02d:%02d:%02d'",
                  i32 / 10000, (i32 % 10000) / 100, i32 % 100);
      my_snprintf(typestr,  typestr_length, "TIME");
      return 3;
    }
    
  case MYSQL_TYPE_DATE:
    {
      uint i32= uint3korr(ptr);
      my_b_printf(file , "'%04d:%02d:%02d'",
                  (i32 / (16L * 32L)), (i32 / 32L % 16L), (i32 % 32L));
      my_snprintf(typestr, typestr_length, "DATE");
      return 3;
    }
  
  case MYSQL_TYPE_YEAR:
    {
      uint32 i32= *ptr;
      my_b_printf(file, "%04d", i32+ 1900);
      my_snprintf(typestr, typestr_length, "YEAR");
      return 1;
    }
  
  case MYSQL_TYPE_ENUM:
    switch (length) { 
    case 1:
      my_b_printf(file, "%d", (int) *ptr);
      my_snprintf(typestr, typestr_length, "ENUM(1 byte)");
      return 1;
    case 2:
      {
        int32 i32= uint2korr(ptr);
        my_b_printf(file, "%d", i32);
        my_snprintf(typestr, typestr_length, "ENUM(2 bytes)");
        return 2;
      }
    default:
      my_b_printf(file, "!! Unknown ENUM packlen=%d", length); 
      return 0;
    }
    break;
    
  case MYSQL_TYPE_SET:
    my_b_write_bit(file, ptr , length * 8);
    my_snprintf(typestr, typestr_length, "SET(%d bytes)", length);
    return length;
  
  case MYSQL_TYPE_BLOB:
    switch (meta) {
    case 1:
      length= *ptr;
      my_b_write_quoted(file, ptr + 1, length);
      my_snprintf(typestr, typestr_length, "TINYBLOB/TINYTEXT");
      return length + 1;
    case 2:
      length= uint2korr(ptr);
      my_b_write_quoted(file, ptr + 2, length);
      my_snprintf(typestr, typestr_length, "BLOB/TEXT");
      return length + 2;
    case 3:
      length= uint3korr(ptr);
      my_b_write_quoted(file, ptr + 3, length);
      my_snprintf(typestr, typestr_length, "MEDIUMBLOB/MEDIUMTEXT");
      return length + 3;
    case 4:
      length= uint4korr(ptr);
      my_b_write_quoted(file, ptr + 4, length);
      my_snprintf(typestr, typestr_length, "LONGBLOB/LONGTEXT");
      return length + 4;
    default:
      my_b_printf(file, "!! Unknown BLOB packlen=%d", length);
      return 0;
    }

  case MYSQL_TYPE_VARCHAR:
  case MYSQL_TYPE_VAR_STRING:
    length= meta;
    my_snprintf(typestr, typestr_length, "VARSTRING(%d)", length);
    return my_b_write_quoted_with_length(file, ptr, length);

  case MYSQL_TYPE_STRING:
    my_snprintf(typestr, typestr_length, "STRING(%d)", length);
    return my_b_write_quoted_with_length(file, ptr, length);

  default:
    {
      char tmp[5];
      my_snprintf(tmp, sizeof(tmp), "%04x", meta);
      my_b_printf(file,
                  "!! Don't know how to handle column type=%d meta=%d (%s)",
                  type, meta, tmp);
    }
    break;
  }
  *typestr= 0;
  return 0;
}


/**
  Print a packed row into IO cache
  
  @param[in] file              IO cache
  @param[in] td                Table definition
  @param[in] print_event_into  Print parameters
  @param[in] cols_bitmap       Column bitmaps.
  @param[in] value             Pointer to packed row
  @param[in] prefix            Row's SQL clause ("SET", "WHERE", etc)
  
  @retval   - number of bytes scanned.
*/


size_t
Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td,
                                      PRINT_EVENT_INFO *print_event_info,
                                      MY_BITMAP *cols_bitmap,
                                      const uchar *value, const uchar *prefix)
{
  const uchar *value0= value;
  const uchar *null_bits= value;
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  uint null_bit_index= 0;
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  char typestr[64]= "";
  
  value+= (m_width + 7) / 8;
  
  my_b_printf(file, "%s", prefix);
  
  for (size_t i= 0; i < td->size(); i ++)
  {
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    int is_null= (null_bits[null_bit_index / 8] 
                  >> (null_bit_index % 8))  & 0x01;
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    if (bitmap_is_set(cols_bitmap, i) == 0)
      continue;
    
    if (is_null)
    {
      my_b_printf(file, "###   @%d=NULL", i + 1);
    }
    else
    {
      my_b_printf(file, "###   @%d=", i + 1);
      size_t size= log_event_print_value(file, value,
                                         td->type(i), td->field_metadata(i),
                                         typestr, sizeof(typestr));
      if (!size)
        return 0;

      value+= size;
    }

    if (print_event_info->verbose > 1)
    {
      my_b_printf(file, " /* ");

      if (typestr[0])
        my_b_printf(file, "%s ", typestr);
      else
        my_b_printf(file, "type=%d ", td->type(i));
      
      my_b_printf(file, "meta=%d nullable=%d is_null=%d ",
                  td->field_metadata(i),
                  td->maybe_null(i), is_null);
      my_b_printf(file, "*/");
    }
    
    my_b_printf(file, "\n");
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    null_bit_index++;
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  }
  return value - value0;
}


/**
  Print a row event into IO cache in human readable form (in SQL format)
  
  @param[in] file              IO cache
  @param[in] print_event_into  Print parameters
*/
void Rows_log_event::print_verbose(IO_CACHE *file,
                                   PRINT_EVENT_INFO *print_event_info)
{
  Table_map_log_event *map;
  table_def *td;
  const char *sql_command, *sql_clause1, *sql_clause2;
  Log_event_type type_code= get_type_code();
  
  switch (type_code) {
  case WRITE_ROWS_EVENT:
    sql_command= "INSERT INTO";
    sql_clause1= "### SET\n";
    sql_clause2= NULL;
    break;
  case DELETE_ROWS_EVENT:
    sql_command= "DELETE FROM";
    sql_clause1= "### WHERE\n";
    sql_clause2= NULL;
    break;
  case UPDATE_ROWS_EVENT:
    sql_command= "UPDATE";
    sql_clause1= "### WHERE\n";
    sql_clause2= "### SET\n";
    break;
  default:
    sql_command= sql_clause1= sql_clause2= NULL;
    DBUG_ASSERT(0); /* Not possible */
  }
  
  if (!(map= print_event_info->m_table_map.get_table(m_table_id)) ||
      !(td= map->create_table_def()))
  {
    my_b_printf(file, "### Row event for unknown table #%d", m_table_id);
    return;
  }

  for (const uchar *value= m_rows_buf; value < m_rows_end; )
  {
    size_t length;
    my_b_printf(file, "### %s %s.%s\n",
                      sql_command,
                      map->get_db_name(), map->get_table_name());
    /* Print the first image */
    if (!(length= print_verbose_one_row(file, td, print_event_info,
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                                  &m_cols, value,
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                                  (const uchar*) sql_clause1)))
      goto end;
    value+= length;

    /* Print the second image (for UPDATE only) */
    if (sql_clause2)
    {
      if (!(length= print_verbose_one_row(file, td, print_event_info,
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                                      &m_cols_ai, value,
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                                      (const uchar*) sql_clause2)))
        goto end;
      value+= length;
    }
  }

end:
  delete td;
}

#ifdef MYSQL_CLIENT
void free_table_map_log_event(Table_map_log_event *event)
{
  delete event;
}
#endif

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void Log_event::print_base64(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool more)
2020
{
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  const uchar *ptr= (const uchar *)temp_buf;
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  uint32 size= uint4korr(ptr + EVENT_LEN_OFFSET);
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  DBUG_ENTER("Log_event::print_base64");

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  size_t const tmp_str_sz= base64_needed_encoded_length((int) size);
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  char *const tmp_str= (char *) my_malloc(tmp_str_sz, MYF(MY_WME));
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  if (!tmp_str) {
    fprintf(stderr, "\nError: Out of memory. "
            "Could not print correct binlog event.\n");
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    DBUG_VOID_RETURN;
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  }
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  if (base64_encode(ptr, (size_t) size, tmp_str))
  {
    DBUG_ASSERT(0);
  }
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  if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
  {
    if (my_b_tell(file) == 0)
      my_b_printf(file, "\nBINLOG '\n");
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    my_b_printf(file, "%s\n", tmp_str);
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    if (!more)
      my_b_printf(file, "'%s\n", print_event_info->delimiter);
  }
  
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  if (print_event_info->verbose)
  {
    Rows_log_event *ev= NULL;
    
    if (ptr[4] == TABLE_MAP_EVENT)
    {
      Table_map_log_event *map; 
      map= new Table_map_log_event((const char*) ptr, size, 
                                   glob_description_event);
      print_event_info->m_table_map.set_table(map->get_table_id(), map);
    }
    else if (ptr[4] == WRITE_ROWS_EVENT)
    {
      ev= new Write_rows_log_event((const char*) ptr, size,
                                   glob_description_event);
    }
    else if (ptr[4] == DELETE_ROWS_EVENT)
    {
      ev= new Delete_rows_log_event((const char*) ptr, size,
                                    glob_description_event);
    }
    else if (ptr[4] == UPDATE_ROWS_EVENT)
    {
      ev= new Update_rows_log_event((const char*) ptr, size,
                                    glob_description_event);
    }
    
    if (ev)
    {
      ev->print_verbose(file, print_event_info);
      delete ev;
    }
  }
    
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  my_free(tmp_str, MYF(0));
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  DBUG_VOID_RETURN;
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}


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/*
2089
  Log_event::print_timestamp()
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*/
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void Log_event::print_timestamp(IO_CACHE* file, time_t* ts)
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{
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  struct tm *res;
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  DBUG_ENTER("Log_event::print_timestamp");
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  if (!ts)
    ts = &when;
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#ifdef MYSQL_SERVER				// This is always false
  struct tm tm_tmp;
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  localtime_r(ts,(res= &tm_tmp));
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#else
2102
  res=localtime(ts);
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#endif
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  my_b_printf(file,"%02d%02d%02d %2d:%02d:%02d",
              res->tm_year % 100,
              res->tm_mon+1,
              res->tm_mday,
              res->tm_hour,
              res->tm_min,
              res->tm_sec);
  DBUG_VOID_RETURN;
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}

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#endif /* MYSQL_CLIENT */
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#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
inline Log_event::enum_skip_reason
Log_event::continue_group(Relay_log_info *rli)
{
  if (rli->slave_skip_counter == 1)
    return Log_event::EVENT_SKIP_IGNORE;
  return Log_event::do_shall_skip(rli);
}
#endif

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/**************************************************************************
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	Query_log_event methods
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**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
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  This (which is used only for SHOW BINLOG EVENTS) could be updated to
  print SET @@session_var=. But this is not urgent, as SHOW BINLOG EVENTS is
  only an information, it does not produce suitable queries to replay (for
  example it does not print LOAD DATA INFILE).
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  @todo
    show the catalog ??
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*/
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void Query_log_event::pack_info(Protocol *protocol)
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{
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  // TODO: show the catalog ??
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  char *buf, *pos;
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  if (!(buf= (char*) my_malloc(9 + db_len + q_len, MYF(MY_WME))))
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    return;
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  pos= buf;
  if (!(flags & LOG_EVENT_SUPPRESS_USE_F)
2151
      && db && db_len)
2152
  {
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    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
2157
  if (query && q_len)
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  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
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  protocol->store(buf, pos-buf, &my_charset_bin);
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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}
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#endif
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#ifndef MYSQL_CLIENT
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/**
  Utility function for the next method (Query_log_event::write()) .
*/
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static void write_str_with_code_and_len(uchar **dst, const char *src,
                                        uint len, uint code)
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{
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  /*
    only 1 byte to store the length of catalog, so it should not
    surpass 255
  */
  DBUG_ASSERT(len <= 255);
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  DBUG_ASSERT(src);
  *((*dst)++)= code;
  *((*dst)++)= (uchar) len;
  bmove(*dst, src, len);
  (*dst)+= len;
}


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/**
  Query_log_event::write().
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  @note
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    In this event we have to modify the header to have the correct
    EVENT_LEN_OFFSET as we don't yet know how many status variables we
    will print!
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*/
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bool Query_log_event::write(IO_CACHE* file)
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{
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  uchar buf[QUERY_HEADER_LEN + MAX_SIZE_LOG_EVENT_STATUS];
  uchar *start, *start_of_status;
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  ulong event_length;
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  if (!query)
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    return 1;                                   // Something wrong with event

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  /*
    We want to store the thread id:
    (- as an information for the user when he reads the binlog)
    - if the query uses temporary table: for the slave SQL thread to know to
    which master connection the temp table belongs.
2211
    Now imagine we (write()) are called by the slave SQL thread (we are
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    logging a query executed by this thread; the slave runs with
    --log-slave-updates). Then this query will be logged with
    thread_id=the_thread_id_of_the_SQL_thread. Imagine that 2 temp tables of
    the same name were created simultaneously on the master (in the master
    binlog you have
    CREATE TEMPORARY TABLE t; (thread 1)
    CREATE TEMPORARY TABLE t; (thread 2)
    ...)
    then in the slave's binlog there will be
    CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
    CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
    which is bad (same thread id!).

    To avoid this, we log the thread's thread id EXCEPT for the SQL
    slave thread for which we log the original (master's) thread id.
    Now this moves the bug: what happens if the thread id on the
    master was 10 and when the slave replicates the query, a
    connection number 10 is opened by a normal client on the slave,
    and updates a temp table of the same name? We get a problem
    again. To avoid this, in the handling of temp tables (sql_base.cc)
    we use thread_id AND server_id.  TODO when this is merged into
    4.1: in 4.1, slave_proxy_id has been renamed to pseudo_thread_id
    and is a session variable: that's to make mysqlbinlog work with
    temp tables. We probably need to introduce

    SET PSEUDO_SERVER_ID
    for mysqlbinlog in 4.1. mysqlbinlog would print:
    SET PSEUDO_SERVER_ID=
    SET PSEUDO_THREAD_ID=
    for each query using temp tables.
  */
  int4store(buf + Q_THREAD_ID_OFFSET, slave_proxy_id);
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  int4store(buf + Q_EXEC_TIME_OFFSET, exec_time);
  buf[Q_DB_LEN_OFFSET] = (char) db_len;
  int2store(buf + Q_ERR_CODE_OFFSET, error_code);

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  /*
    You MUST always write status vars in increasing order of code. This
    guarantees that a slightly older slave will be able to parse those he
    knows.
  */
  start_of_status= start= buf+QUERY_HEADER_LEN;
  if (flags2_inited)
  {
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    *start++= Q_FLAGS2_CODE;
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    int4store(start, flags2);
    start+= 4;
  }
  if (sql_mode_inited)
  {
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    *start++= Q_SQL_MODE_CODE;
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    int8store(start, (ulonglong)sql_mode);
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    start+= 8;
  }
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  if (catalog_len) // i.e. this var is inited (false for 4.0 events)
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  {
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    write_str_with_code_and_len(&start,
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                                catalog, catalog_len, Q_CATALOG_NZ_CODE);
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    /*
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      In 5.0.x where x<4 masters we used to store the end zero here. This was
      a waste of one byte so we don't do it in x>=4 masters. We change code to
      Q_CATALOG_NZ_CODE, because re-using the old code would make x<4 slaves
      of this x>=4 master segfault (expecting a zero when there is
      none). Remaining compatibility problems are: the older slave will not
      find the catalog; but it is will not crash, and it's not an issue
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      that it does not find the catalog as catalogs were not used in these
      older MySQL versions (we store it in binlog and read it from relay log
      but do nothing useful with it). What is an issue is that the older slave
      will stop processing the Q_* blocks (and jumps to the db/query) as soon
      as it sees unknown Q_CATALOG_NZ_CODE; so it will not be able to read
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      Q_AUTO_INCREMENT*, Q_CHARSET and so replication will fail silently in
      various ways. Documented that you should not mix alpha/beta versions if
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      they are not exactly the same version, with example of 5.0.3->5.0.2 and
      5.0.4->5.0.3. If replication is from older to new, the new will
      recognize Q_CATALOG_CODE and have no problem.
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    */
  }
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  if (auto_increment_increment != 1 || auto_increment_offset != 1)
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  {
    *start++= Q_AUTO_INCREMENT;
    int2store(start, auto_increment_increment);
    int2store(start+2, auto_increment_offset);
    start+= 4;
  }
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  if (charset_inited)
  {
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    *start++= Q_CHARSET_CODE;
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    memcpy(start, charset, 6);
    start+= 6;
  }
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  if (time_zone_len)
  {
    /* In the TZ sys table, column Name is of length 64 so this should be ok */
    DBUG_ASSERT(time_zone_len <= MAX_TIME_ZONE_NAME_LENGTH);
2306
    write_str_with_code_and_len(&start,
2307
                                time_zone_str, time_zone_len, Q_TIME_ZONE_CODE);
2308
  }
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  if (lc_time_names_number)
  {
    DBUG_ASSERT(lc_time_names_number <= 0xFFFF);
    *start++= Q_LC_TIME_NAMES_CODE;
    int2store(start, lc_time_names_number);
    start+= 2;
  }
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  if (charset_database_number)
  {
    DBUG_ASSERT(charset_database_number <= 0xFFFF);
    *start++= Q_CHARSET_DATABASE_CODE;
    int2store(start, charset_database_number);
    start+= 2;
  }
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  if (table_map_for_update)
  {
    *start++= Q_TABLE_MAP_FOR_UPDATE_CODE;
    int8store(start, table_map_for_update);
    start+= 8;
  }
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  if (master_data_written != 0)
  {
    /*
      Q_MASTER_DATA_WRITTEN_CODE only exists in relay logs where the master
      has binlog_version<4 and the slave has binlog_version=4. See comment
      for master_data_written in log_event.h for details.
    */
    *start++= Q_MASTER_DATA_WRITTEN_CODE;
    int4store(start, master_data_written);
    start+= 4;
  }

2341
  if (thd && thd->need_binlog_invoker())
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  {
    LEX_STRING user;
    LEX_STRING host;
    memset(&user, 0, sizeof(user));
    memset(&host, 0, sizeof(host));

    if (thd->slave_thread && thd->has_invoker())
    {
      /* user will be null, if master is older than this patch */
      user= thd->get_invoker_user();
      host= thd->get_invoker_host();
    }
    else if (thd->security_ctx->priv_user)
    {
      Security_context *ctx= thd->security_ctx;

      user.length= strlen(ctx->priv_user);
      user.str= ctx->priv_user;
      if (ctx->priv_host[0] != '\0')
      {
        host.str= ctx->priv_host;
        host.length= strlen(ctx->priv_host);
      }
    }

    if (user.length > 0)
    {
      *start++= Q_INVOKER;

      /*
        Store user length and user. The max length of use is 16, so 1 byte is
        enough to store the user's length.
       */
      *start++= (uchar)user.length;
      memcpy(start, user.str, user.length);
      start+= user.length;

      /*
        Store host length and host. The max length of host is 60, so 1 byte is
        enough to store the host's length.
       */
      *start++= (uchar)host.length;
      memcpy(start, host.str, host.length);
      start+= host.length;
    }
  }
2388
  /*
2389
    NOTE: When adding new status vars, please don't forget to update
2390 2391
    the MAX_SIZE_LOG_EVENT_STATUS in log_event.h and update the function
    code_name() in this file.
2392
   
2393
    Here there could be code like
2394
    if (command-line-option-which-says-"log_this_variable" && inited)
2395
    {
2396
    *start++= Q_THIS_VARIABLE_CODE;
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    int4store(start, this_variable);
    start+= 4;
    }
  */
  
  /* Store length of status variables */
  status_vars_len= (uint) (start-start_of_status);
2404
  DBUG_ASSERT(status_vars_len <= MAX_SIZE_LOG_EVENT_STATUS);
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  int2store(buf + Q_STATUS_VARS_LEN_OFFSET, status_vars_len);

  /*
    Calculate length of whole event
    The "1" below is the \0 in the db's length
  */
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  event_length= (uint) (start-buf) + get_post_header_size_for_derived() + db_len + 1 + q_len;
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  return (write_header(file, event_length) ||
2414
          my_b_safe_write(file, (uchar*) buf, QUERY_HEADER_LEN) ||
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          write_post_header_for_derived(file) ||
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          my_b_safe_write(file, (uchar*) start_of_status,
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                          (uint) (start-start_of_status)) ||
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          my_b_safe_write(file, (db) ? (uchar*) db : (uchar*)"", db_len + 1) ||
          my_b_safe_write(file, (uchar*) query, q_len)) ? 1 : 0;
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}

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/**
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  The simplest constructor that could possibly work.  This is used for
  creating static objects that have a special meaning and are invisible
  to the log.  
*/
Query_log_event::Query_log_event()
  :Log_event(), data_buf(0)
{
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  memset(&user, 0, sizeof(user));
  memset(&host, 0, sizeof(host));
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}

2434

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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
2438
      thd_arg           - thread handle
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      query_arg         - array of char representing the query
      query_length      - size of the  `query_arg' array
      using_trans       - there is a modified transactional table
      suppress_use      - suppress the generation of 'USE' statements
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      errcode           - the error code of the query
      
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  DESCRIPTION
  Creates an event for binlogging
2447
  The value for `errcode' should be supplied by caller.
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*/
2449
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
2450
				 ulong query_length, bool using_trans,
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				 bool suppress_use, int errcode)

2453
  :Log_event(thd_arg,
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             (thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F :
              0) |
             (suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0),
2457
	     using_trans),
2458
   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
2459
   db(thd_arg->db), q_len((uint32) query_length),
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   thread_id(thd_arg->thread_id),
   /* save the original thread id; we already know the server id */
2462
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
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   auto_increment_offset(thd_arg->variables.auto_increment_offset),
2467
   lc_time_names_number(thd_arg->variables.lc_time_names->number),
2468
   charset_database_number(0),
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   table_map_for_update((ulonglong)thd_arg->table_map_for_update),
   master_data_written(0)
2471 2472
{
  time_t end_time;
2473

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  memset(&user, 0, sizeof(user));
  memset(&host, 0, sizeof(host));

2477
  error_code= errcode;
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2478

2479
  time(&end_time);
2480
  exec_time = (ulong) (end_time  - thd_arg->start_time);
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  /**
    @todo this means that if we have no catalog, then it is replicated
    as an existing catalog of length zero. is that safe? /sven
  */
2485
  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
2486
  /* status_vars_len is set just before writing the event */
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  db_len = (db) ? (uint32) strlen(db) : 0;
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  if (thd_arg->variables.collation_database != thd_arg->db_charset)
    charset_database_number= thd_arg->variables.collation_database->number;
  
2491
  /*
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    We only replicate over the bits of flags2 that we need: the rest
    are masked out by "& OPTIONS_WRITTEN_TO_BINLOG".

    We also force AUTOCOMMIT=1.  Rationale (cf. BUG#29288): After
    fixing BUG#26395, we always write BEGIN and COMMIT around all
    transactions (even single statements in autocommit mode).  This is
    so that replication from non-transactional to transactional table
    and error recovery from XA to non-XA table should work as
    expected.  The BEGIN/COMMIT are added in log.cc. However, there is
    one exception: MyISAM bypasses log.cc and writes directly to the
    binlog.  So if autocommit is off, master has MyISAM, and slave has
    a transactional engine, then the slave will just see one long
    never-ending transaction.  The only way to bypass explicit
    BEGIN/COMMIT in the binlog is by using a non-transactional table.
    So setting AUTOCOMMIT=1 will make this work as expected.

    Note: explicitly replicate AUTOCOMMIT=1 from master. We do not
    assume AUTOCOMMIT=1 on slave; the slave still reads the state of
    the autocommit flag as written by the master to the binlog. This
    behavior may change after WL#4162 has been implemented.
2512
  */
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  flags2= (uint32) (thd_arg->options &
                    (OPTIONS_WRITTEN_TO_BIN_LOG & ~OPTION_NOT_AUTOCOMMIT));
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  DBUG_ASSERT(thd_arg->variables.character_set_client->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_connection->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_server->number < 256*256);
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  DBUG_ASSERT(thd_arg->variables.character_set_client->mbminlen == 1);
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  int2store(charset, thd_arg->variables.character_set_client->number);
  int2store(charset+2, thd_arg->variables.collation_connection->number);
  int2store(charset+4, thd_arg->variables.collation_server->number);
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  if (thd_arg->time_zone_used)
  {
    /*
      Note that our event becomes dependent on the Time_zone object
      representing the time zone. Fortunately such objects are never deleted
      or changed during mysqld's lifetime.
    */
    time_zone_len= thd_arg->variables.time_zone->get_name()->length();
    time_zone_str= thd_arg->variables.time_zone->get_name()->ptr();
  }
  else
    time_zone_len= 0;
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  DBUG_PRINT("info",("Query_log_event has flags2: %lu  sql_mode: %lu",
                     (ulong) flags2, sql_mode));
2536
}
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#endif /* MYSQL_CLIENT */
2538

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2539

2540 2541
/* 2 utility functions for the next method */

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/**
   Read a string with length from memory.

   This function reads the string-with-length stored at
   <code>src</code> and extract the length into <code>*len</code> and
   a pointer to the start of the string into <code>*dst</code>. The
   string can then be copied using <code>memcpy()</code> with the
   number of bytes given in <code>*len</code>.

   @param src Pointer to variable holding a pointer to the memory to
              read the string from.
   @param dst Pointer to variable holding a pointer where the actual
              string starts. Starting from this position, the string
              can be copied using @c memcpy().
   @param len Pointer to variable where the length will be stored.
   @param end One-past-the-end of the memory where the string is
              stored.

   @return    Zero if the entire string can be copied successfully,
              @c UINT_MAX if the length could not be read from memory
              (that is, if <code>*src >= end</code>), otherwise the
              number of bytes that are missing to read the full
              string, which happends <code>*dst + *len >= end</code>.
2565
*/
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static int
get_str_len_and_pointer(const Log_event::Byte **src,
                        const char **dst,
                        uint *len,
                        const Log_event::Byte *end)
2571
{
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  if (*src >= end)
    return -1;       // Will be UINT_MAX in two-complement arithmetics
  uint length= **src;
  if (length > 0)
  {
    if (*src + length >= end)
2578
      return *src + length - end + 1;       // Number of bytes missing
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    *dst= (char *)*src + 1;                    // Will be copied later
  }
  *len= length;
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  *src+= length + 1;
  return 0;
2584 2585
}

2586 2587 2588
static void copy_str_and_move(const char **src, 
                              Log_event::Byte **dst, 
                              uint len)
2589 2590
{
  memcpy(*dst, *src, len);
2591
  *src= (const char *)*dst;
2592 2593 2594 2595
  (*dst)+= len;
  *(*dst)++= 0;
}

2596

2597
#ifndef DBUG_OFF
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static char const *
code_name(int code)
{
  static char buf[255];
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  switch (code) {
  case Q_FLAGS2_CODE: return "Q_FLAGS2_CODE";
  case Q_SQL_MODE_CODE: return "Q_SQL_MODE_CODE";
  case Q_CATALOG_CODE: return "Q_CATALOG_CODE";
  case Q_AUTO_INCREMENT: return "Q_AUTO_INCREMENT";
  case Q_CHARSET_CODE: return "Q_CHARSET_CODE";
  case Q_TIME_ZONE_CODE: return "Q_TIME_ZONE_CODE";
  case Q_CATALOG_NZ_CODE: return "Q_CATALOG_NZ_CODE";
  case Q_LC_TIME_NAMES_CODE: return "Q_LC_TIME_NAMES_CODE";
  case Q_CHARSET_DATABASE_CODE: return "Q_CHARSET_DATABASE_CODE";
2612
  case Q_TABLE_MAP_FOR_UPDATE_CODE: return "Q_TABLE_MAP_FOR_UPDATE_CODE";
2613
  case Q_MASTER_DATA_WRITTEN_CODE: return "Q_MASTER_DATA_WRITTEN_CODE";
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  }
  sprintf(buf, "CODE#%d", code);
  return buf;
}
2618
#endif
2619

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/**
   Macro to check that there is enough space to read from memory.

   @param PTR Pointer to memory
   @param END End of memory
   @param CNT Number of bytes that should be read.
 */
2627 2628 2629 2630 2631 2632 2633 2634 2635
#define CHECK_SPACE(PTR,END,CNT)                      \
  do {                                                \
    DBUG_PRINT("info", ("Read %s", code_name(pos[-1]))); \
    DBUG_ASSERT((PTR) + (CNT) <= (END));              \
    if ((PTR) + (CNT) > (END)) {                      \
      DBUG_PRINT("info", ("query= 0"));               \
      query= 0;                                       \
      DBUG_VOID_RETURN;                               \
    }                                                 \
2636 2637
  } while (0)

2638

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2639
/**
2640
  This is used by the SQL slave thread to prepare the event before execution.
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2641
*/
2642
Query_log_event::Query_log_event(const char* buf, uint event_len,
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                                 const Format_description_log_event
                                 *description_event,
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2645
                                 Log_event_type event_type)
2646
  :Log_event(buf, description_event), data_buf(0), query(NullS),
2647
   db(NullS), catalog_len(0), status_vars_len(0),
2648
   flags2_inited(0), sql_mode_inited(0), charset_inited(0),
2649
   auto_increment_increment(1), auto_increment_offset(1),
2650
   time_zone_len(0), lc_time_names_number(0), charset_database_number(0),
2651
   table_map_for_update(0), master_data_written(0)
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{
  ulong data_len;
2654 2655
  uint32 tmp;
  uint8 common_header_len, post_header_len;
2656 2657
  Log_event::Byte *start;
  const Log_event::Byte *end;
2658
  bool catalog_nz= 1;
2659 2660
  DBUG_ENTER("Query_log_event::Query_log_event(char*,...)");

2661 2662
  memset(&user, 0, sizeof(user));
  memset(&host, 0, sizeof(host));
2663
  common_header_len= description_event->common_header_len;
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2664
  post_header_len= description_event->post_header_len[event_type-1];
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  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679
                     event_len, common_header_len, post_header_len));
  
  /*
    We test if the event's length is sensible, and if so we compute data_len.
    We cannot rely on QUERY_HEADER_LEN here as it would not be format-tolerant.
    We use QUERY_HEADER_MINIMAL_LEN which is the same for 3.23, 4.0 & 5.0.
  */
  if (event_len < (uint)(common_header_len + post_header_len))
    DBUG_VOID_RETURN;				
  data_len = event_len - (common_header_len + post_header_len);
  buf+= common_header_len;
  
  slave_proxy_id= thread_id = uint4korr(buf + Q_THREAD_ID_OFFSET);
  exec_time = uint4korr(buf + Q_EXEC_TIME_OFFSET);
2680
  db_len = (uint)buf[Q_DB_LEN_OFFSET]; // TODO: add a check of all *_len vars
2681 2682 2683 2684 2685 2686 2687 2688 2689
  error_code = uint2korr(buf + Q_ERR_CODE_OFFSET);

  /*
    5.0 format starts here.
    Depending on the format, we may or not have affected/warnings etc
    The remnent post-header to be parsed has length:
  */
  tmp= post_header_len - QUERY_HEADER_MINIMAL_LEN; 
  if (tmp)
2690
  {
2691
    status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
2692 2693 2694 2695 2696 2697
    /*
      Check if status variable length is corrupt and will lead to very
      wrong data. We could be even more strict and require data_len to
      be even bigger, but this will suffice to catch most corruption
      errors that can lead to a crash.
    */
2698
    if (status_vars_len > min(data_len, MAX_SIZE_LOG_EVENT_STATUS))
2699
    {
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2700
      DBUG_PRINT("info", ("status_vars_len (%u) > data_len (%lu); query= 0",
2701
                          status_vars_len, data_len));
2702 2703 2704
      query= 0;
      DBUG_VOID_RETURN;
    }
2705 2706 2707 2708
    data_len-= status_vars_len;
    DBUG_PRINT("info", ("Query_log_event has status_vars_len: %u",
                        (uint) status_vars_len));
    tmp-= 2;
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  } 
  else
  {
    /*
      server version < 5.0 / binlog_version < 4 master's event is 
      relay-logged with storing the original size of the event in
      Q_MASTER_DATA_WRITTEN_CODE status variable.
      The size is to be restored at reading Q_MASTER_DATA_WRITTEN_CODE-marked
      event from the relay log.
    */
    DBUG_ASSERT(description_event->binlog_version < 4);
    master_data_written= data_written;
2721
  }
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  /*
    We have parsed everything we know in the post header for QUERY_EVENT,
    the rest of post header is either comes from older version MySQL or
    dedicated to derived events (e.g. Execute_load_query...)
  */

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  /* variable-part: the status vars; only in MySQL 5.0  */
  
2730 2731 2732
  start= (Log_event::Byte*) (buf+post_header_len);
  end= (const Log_event::Byte*) (start+status_vars_len);
  for (const Log_event::Byte* pos= start; pos < end;)
2733
  {
2734 2735
    switch (*pos++) {
    case Q_FLAGS2_CODE:
2736
      CHECK_SPACE(pos, end, 4);
2737 2738
      flags2_inited= 1;
      flags2= uint4korr(pos);
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      DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", (ulong) flags2));
2740 2741 2742 2743 2744 2745 2746
      pos+= 4;
      break;
    case Q_SQL_MODE_CODE:
    {
#ifndef DBUG_OFF
      char buff[22];
#endif
2747
      CHECK_SPACE(pos, end, 8);
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      sql_mode_inited= 1;
      sql_mode= (ulong) uint8korr(pos); // QQ: Fix when sql_mode is ulonglong
      DBUG_PRINT("info",("In Query_log_event, read sql_mode: %s",
			 llstr(sql_mode, buff)));
      pos+= 8;
      break;
    }
2755
    case Q_CATALOG_NZ_CODE:
2756
      DBUG_PRINT("info", ("case Q_CATALOG_NZ_CODE; pos: 0x%lx; end: 0x%lx",
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                          (ulong) pos, (ulong) end));
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      if (get_str_len_and_pointer(&pos, &catalog, &catalog_len, end))
      {
2760
        DBUG_PRINT("info", ("query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
2764 2765
      break;
    case Q_AUTO_INCREMENT:
2766
      CHECK_SPACE(pos, end, 4);
2767 2768 2769 2770
      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
2771 2772
    case Q_CHARSET_CODE:
    {
2773
      CHECK_SPACE(pos, end, 6);
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      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
2779 2780
    case Q_TIME_ZONE_CODE:
    {
2781 2782
      if (get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len, end))
      {
2783
        DBUG_PRINT("info", ("Q_TIME_ZONE_CODE: query= 0"));
2784 2785 2786
        query= 0;
        DBUG_VOID_RETURN;
      }
2787 2788
      break;
    }
2789
    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
2790
      CHECK_SPACE(pos, end, 1);
2791 2792
      if ((catalog_len= *pos))
        catalog= (char*) pos+1;                           // Will be copied later
2793
      CHECK_SPACE(pos, end, catalog_len + 2);
2794 2795 2796
      pos+= catalog_len+2; // leap over end 0
      catalog_nz= 0; // catalog has end 0 in event
      break;
2797
    case Q_LC_TIME_NAMES_CODE:
2798
      CHECK_SPACE(pos, end, 2);
2799 2800 2801
      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
2802
    case Q_CHARSET_DATABASE_CODE:
2803
      CHECK_SPACE(pos, end, 2);
2804 2805 2806
      charset_database_number= uint2korr(pos);
      pos+= 2;
      break;
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    case Q_TABLE_MAP_FOR_UPDATE_CODE:
      CHECK_SPACE(pos, end, 8);
      table_map_for_update= uint8korr(pos);
      pos+= 8;
      break;
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    case Q_MASTER_DATA_WRITTEN_CODE:
      CHECK_SPACE(pos, end, 4);
      data_written= master_data_written= uint4korr(pos);
      pos+= 4;
      break;
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    case Q_INVOKER:
    {
      CHECK_SPACE(pos, end, 1);
      user.length= *pos++;
      CHECK_SPACE(pos, end, user.length);
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      user.str= (char *)pos;
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      pos+= user.length;

      CHECK_SPACE(pos, end, 1);
      host.length= *pos++;
      CHECK_SPACE(pos, end, host.length);
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      host.str= (char *)pos;
2829 2830
      pos+= host.length;
    }
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    default:
      /* That's why you must write status vars in growing order of code */
      DBUG_PRINT("info",("Query_log_event has unknown status vars (first has\
 code: %u), skipping the rest of them", (uint) *(pos-1)));
2835
      pos= (const uchar*) end;                         // Break loop
2836
    }
2837
  }
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2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854

  /**
    Layout for the data buffer is as follows
    +--------+-----------+------+------+---------+----+-------+
    | catlog | time_zone | user | host | db name | \0 | Query |
    +--------+-----------+------+------+---------+----+-------+

    To support the query cache we append the following buffer to the above
    +-------+----------------------------------------+-------+
    |db len | uninitiatlized space of size of db len | FLAGS |
    +-------+----------------------------------------+-------+

    The area of buffer starting from Query field all the way to the end belongs
    to the Query buffer and its structure is described in alloc_query() in
    sql_parse.cc
    */

2855
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
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  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1
                                                    +  time_zone_len + 1
                                                    +  user.length + 1
                                                    +  host.length + 1
                                                    +  data_len + 1
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                                                    +  sizeof(size_t)//for db_len
                                                    +  db_len + 1
                                                    +  QUERY_CACHE_FLAGS_SIZE,
                                                       MYF(MY_WME))))
#else
  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1
                                                    +  time_zone_len + 1
                                                    +  user.length + 1
                                                    +  host.length + 1
                                                    +  data_len + 1,
                                                       MYF(MY_WME))))
2872
#endif
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2873
      DBUG_VOID_RETURN;
2874
  if (catalog_len)                                  // If catalog is given
2875
  {
2876 2877 2878 2879 2880
    /**
      @todo we should clean up and do only copy_str_and_move; it
      works for both cases.  Then we can remove the catalog_nz
      flag. /sven
    */
2881
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
2882
      copy_str_and_move(&catalog, &start, catalog_len);
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    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
2886
      catalog= (const char *)start;
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      start+= catalog_len+1;
    }
2889
  }
2890
  if (time_zone_len)
2891
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
2892

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  if (user.length > 0)
    copy_str_and_move((const char **)&(user.str), &start, user.length);
  if (host.length > 0)
    copy_str_and_move((const char **)&(host.str), &start, host.length);

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  /**
    if time_zone_len or catalog_len are 0, then time_zone and catalog
    are uninitialized at this point.  shouldn't they point to the
    zero-length null-terminated strings we allocated space for in the
    my_alloc call above? /sven
  */

2905
  /* A 2nd variable part; this is common to all versions */ 
2906
  memcpy((char*) start, end, data_len);          // Copy db and query
2907
  start[data_len]= '\0';              // End query with \0 (For safetly)
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  db= (char *)start;
  query= (char *)(start + db_len + 1);
2910
  q_len= data_len - db_len -1;
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  /**
    Append the db length at the end of the buffer. This will be used by
    Query_cache::send_result_to_client() in case the query cache is On.
   */
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
  size_t db_length= (size_t)db_len;
  memcpy(start + data_len + 1, &db_length, sizeof(size_t));
#endif
2919
  DBUG_VOID_RETURN;
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}

2922

2923
#ifdef MYSQL_CLIENT
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/**
  Query_log_event::print().

  @todo
    print the catalog ??
*/
2930
void Query_log_event::print_query_header(IO_CACHE* file,
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					 PRINT_EVENT_INFO* print_event_info)
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{
2933
  // TODO: print the catalog ??
2934
  char buff[40],*end;				// Enough for SET TIMESTAMP
2935 2936 2937
  bool different_db= 1;
  uint32 tmp;

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  if (!print_event_info->short_form)
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  {
2940 2941 2942 2943
    print_header(file, print_event_info, FALSE);
    my_b_printf(file, "\t%s\tthread_id=%lu\texec_time=%lu\terror_code=%d\n",
                get_type_str(), (ulong) thread_id, (ulong) exec_time,
                error_code);
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  }

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  if ((flags & LOG_EVENT_SUPPRESS_USE_F))
  {
    if (!is_trans_keyword())
      print_event_info->db[0]= '\0';
  }
  else if (db)
2952
  {
2953 2954
    different_db= memcmp(print_event_info->db, db, db_len + 1);
    if (different_db)
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      memcpy(print_event_info->db, db, db_len + 1);
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    if (db[0] && different_db) 
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      my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
2958
  }
2959

2960
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
2961
  end= strmov(end, print_event_info->delimiter);
2962
  *end++='\n';
2963
  my_b_write(file, (uchar*) buff, (uint) (end-buff));
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  if ((!print_event_info->thread_id_printed ||
       ((flags & LOG_EVENT_THREAD_SPECIFIC_F) &&
        thread_id != print_event_info->thread_id)))
  {
    // If --short-form, print deterministic value instead of pseudo_thread_id.
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    my_b_printf(file,"SET @@session.pseudo_thread_id=%lu%s\n",
2970 2971 2972 2973 2974
                short_form ? 999999999 : (ulong)thread_id,
                print_event_info->delimiter);
    print_event_info->thread_id= thread_id;
    print_event_info->thread_id_printed= 1;
  }
2975

2976
  /*
2977 2978 2979
    If flags2_inited==0, this is an event from 3.23 or 4.0; nothing to
    print (remember we don't produce mixed relay logs so there cannot be
    5.0 events before that one so there is nothing to reset).
2980 2981 2982 2983
  */
  if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
  {
    /* tmp is a bitmask of bits which have changed. */
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    if (likely(print_event_info->flags2_inited)) 
2985
      /* All bits which have changed */
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      tmp= (print_event_info->flags2) ^ flags2;
2987 2988
    else /* that's the first Query event we read */
    {
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      print_event_info->flags2_inited= 1;
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      tmp= ~((uint32)0); /* all bits have changed */
    }

    if (unlikely(tmp)) /* some bits have changed */
    {
      bool need_comma= 0;
2996
      my_b_printf(file, "SET ");
2997
      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
2998
                       "@@session.foreign_key_checks", &need_comma);
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      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
3000
                       "@@session.sql_auto_is_null", &need_comma);
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      print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
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                       "@@session.unique_checks", &need_comma);
      print_set_option(file, tmp, OPTION_NOT_AUTOCOMMIT, ~flags2,
                       "@@session.autocommit", &need_comma);
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      my_b_printf(file,"%s\n", print_event_info->delimiter);
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      print_event_info->flags2= flags2;
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    }
  }

  /*
3011 3012 3013 3014 3015 3016 3017 3018 3019 3020
    Now the session variables;
    it's more efficient to pass SQL_MODE as a number instead of a
    comma-separated list.
    FOREIGN_KEY_CHECKS, SQL_AUTO_IS_NULL, UNIQUE_CHECKS are session-only
    variables (they have no global version; they're not listed in
    sql_class.h), The tests below work for pure binlogs or pure relay
    logs. Won't work for mixed relay logs but we don't create mixed
    relay logs (that is, there is no relay log with a format change
    except within the 3 first events, which mysqlbinlog handles
    gracefully). So this code should always be good.
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  */

3023 3024 3025
  if (likely(sql_mode_inited) &&
      (unlikely(print_event_info->sql_mode != sql_mode ||
                !print_event_info->sql_mode_inited)))
3026
  {
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    my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
                (ulong)sql_mode, print_event_info->delimiter);
    print_event_info->sql_mode= sql_mode;
    print_event_info->sql_mode_inited= 1;
3031
  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
3034
  {
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    my_b_printf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu%s\n",
                auto_increment_increment,auto_increment_offset,
                print_event_info->delimiter);
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    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
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  }

3042 3043
  /* TODO: print the catalog when we feature SET CATALOG */

3044 3045
  if (likely(charset_inited) &&
      (unlikely(!print_event_info->charset_inited ||
3046
                memcmp(print_event_info->charset, charset, 6))))
3047
  {
3048 3049
    CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
    if (cs_info)
3050
    {
3051 3052 3053
      /* for mysql client */
      my_b_printf(file, "/*!\\C %s */%s\n",
                  cs_info->csname, print_event_info->delimiter);
3054
    }
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    my_b_printf(file,"SET "
                "@@session.character_set_client=%d,"
                "@@session.collation_connection=%d,"
                "@@session.collation_server=%d"
                "%s\n",
                uint2korr(charset),
                uint2korr(charset+2),
                uint2korr(charset+4),
                print_event_info->delimiter);
    memcpy(print_event_info->charset, charset, 6);
    print_event_info->charset_inited= 1;
3066
  }
3067 3068
  if (time_zone_len)
  {
3069 3070
    if (memcmp(print_event_info->time_zone_str,
               time_zone_str, time_zone_len+1))
3071
    {
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      my_b_printf(file,"SET @@session.time_zone='%s'%s\n",
                  time_zone_str, print_event_info->delimiter);
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      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
3075 3076
    }
  }
3077 3078
  if (lc_time_names_number != print_event_info->lc_time_names_number)
  {
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    my_b_printf(file, "SET @@session.lc_time_names=%d%s\n",
                lc_time_names_number, print_event_info->delimiter);
3081 3082
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
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  if (charset_database_number != print_event_info->charset_database_number)
  {
    if (charset_database_number)
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      my_b_printf(file, "SET @@session.collation_database=%d%s\n",
                  charset_database_number, print_event_info->delimiter);
3088
    else
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3089 3090
      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
3091 3092
    print_event_info->charset_database_number= charset_database_number;
  }
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}

3095

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3096
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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3097
{
3098 3099
  Write_on_release_cache cache(&print_event_info->head_cache, file);

3100 3101 3102 3103 3104 3105
  /**
    reduce the size of io cache so that the write function is called
    for every call to my_b_write().
   */
  DBUG_EXECUTE_IF ("simulate_file_write_error",
                   {(&cache)->write_pos= (&cache)->write_end- 500;});
3106
  print_query_header(&cache, print_event_info);
3107
  my_b_write(&cache, (uchar*) query, q_len);
3108
  my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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3109
}
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3110
#endif /* MYSQL_CLIENT */
3111

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3112

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3113
/*
3114
  Query_log_event::do_apply_event()
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3115
*/
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3116

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SCRUM  
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3117
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3118

3119
int Query_log_event::do_apply_event(Relay_log_info const *rli)
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3120
{
3121
  return do_apply_event(rli, query, q_len);
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}


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/**
  @todo
  Compare the values of "affected rows" around here. Something
  like:
  @code
     if ((uint32) affected_in_event != (uint32) affected_on_slave)
     {
     sql_print_error("Slave: did not get the expected number of affected \
     rows running query from master - expected %d, got %d (this numbers \
     should have matched modulo 4294967296).", 0, ...);
     thd->query_error = 1;
     }
  @endcode
  We may also want an option to tell the slave to ignore "affected"
  mismatch. This mismatch could be implemented with a new ER_ code, and
  to ignore it you would use --slave-skip-errors...
*/
3142
int Query_log_event::do_apply_event(Relay_log_info const *rli,
3143
                                      const char *query_arg, uint32 q_len_arg)
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3144
{
3145
  LEX_STRING new_db;
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3146
  int expected_error,actual_error= 0;
3147 3148
  HA_CREATE_INFO db_options;

3149
  /*
3150 3151 3152
    Colleagues: please never free(thd->catalog) in MySQL. This would
    lead to bugs as here thd->catalog is a part of an alloced block,
    not an entire alloced block (see
3153
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
3154
    you.
3155
  */
3156
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
3157 3158 3159
  new_db.length= db_len;
  new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
  thd->set_db(new_db.str, new_db.length);       /* allocates a copy of 'db' */
3160 3161 3162 3163 3164 3165 3166

  /*
    Setting the character set and collation of the current database thd->db.
   */
  load_db_opt_by_name(thd, thd->db, &db_options);
  if (db_options.default_table_charset)
    thd->db_charset= db_options.default_table_charset;
3167 3168
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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3169

3170
  /*
3171 3172 3173 3174 3175 3176 3177 3178
    InnoDB internally stores the master log position it has executed so far,
    i.e. the position just after the COMMIT event.
    When InnoDB will want to store, the positions in rli won't have
    been updated yet, so group_master_log_* will point to old BEGIN
    and event_master_log* will point to the beginning of current COMMIT.
    But log_pos of the COMMIT Query event is what we want, i.e. the pos of the
    END of the current log event (COMMIT). We save it in rli so that InnoDB can
    access it.
3179
  */
3180
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
3181 3182
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

3183
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
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  if (strcmp("COMMIT", query) == 0 && rli->tables_to_lock)
  {
    /*
      Cleaning-up the last statement context:
      the terminal event of the current statement flagged with
      STMT_END_F got filtered out in ndb circular replication.
    */
    int error;
    char llbuff[22];
    if ((error= rows_event_stmt_cleanup(const_cast<Relay_log_info*>(rli), thd)))
    {
      const_cast<Relay_log_info*>(rli)->report(ERROR_LEVEL, error,
                  "Error in cleaning up after an event preceeding the commit; "
                  "the group log file/position: %s %s",
                  const_cast<Relay_log_info*>(rli)->group_master_log_name,
                  llstr(const_cast<Relay_log_info*>(rli)->group_master_log_pos,
                        llbuff));
    }
    /*
      Executing a part of rli->stmt_done() logics that does not deal
      with group position change. The part is redundant now but is 
      future-change-proof addon, e.g if COMMIT handling will start checking
      invariants like IN_STMT flag must be off at committing the transaction.
    */
    const_cast<Relay_log_info*>(rli)->inc_event_relay_log_pos();
    const_cast<Relay_log_info*>(rli)->clear_flag(Relay_log_info::IN_STMT);
  }
  else
  {
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
  }
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  /*
    Note:   We do not need to execute reset_one_shot_variables() if this
            db_ok() test fails.
    Reason: The db stored in binlog events is the same for SET and for
            its companion query.  If the SET is ignored because of
            db_ok(), the companion query will also be ignored, and if
            the companion query is ignored in the db_ok() test of
3223
            ::do_apply_event(), then the companion SET also have so
3224
            we don't need to reset_one_shot_variables().
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3225
  */
3226
  if (is_trans_keyword() || rpl_filter->db_ok(thd->db))
3227 3228
  {
    thd->set_time((time_t)when);
3229
    thd->set_query((char*)query_arg, q_len_arg);
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    VOID(pthread_mutex_lock(&LOCK_thread_count));
3231
    thd->query_id = next_query_id();
3232
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
3234
    DBUG_PRINT("query",("%s", thd->query()));
3235

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3236
    if (ignored_error_code((expected_error= error_code)) ||
3237
	!unexpected_error_code(expected_error))
3238 3239 3240
    {
      if (flags2_inited)
        /*
3241 3242
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
3243
        */
3244
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
3245 3246
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
3247 3248
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
3249 3250 3251 3252 3253
      */
      /*
        We do not replicate IGNORE_DIR_IN_CREATE. That is, if the master is a
        slave which runs with SQL_MODE=IGNORE_DIR_IN_CREATE, this should not
        force us to ignore the dir too. Imagine you are a ring of machines, and
3254 3255 3256
        one has a disk problem so that you temporarily need
        IGNORE_DIR_IN_CREATE on this machine; you don't want it to propagate
        elsewhere (you don't want all slaves to start ignoring the dirs).
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      */
      if (sql_mode_inited)
        thd->variables.sql_mode=
          (ulong) ((thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE) |
                   (sql_mode & ~(ulong) MODE_NO_DIR_IN_CREATE));
      if (charset_inited)
      {
        if (rli->cached_charset_compare(charset))
        {
          /* Verify that we support the charsets found in the event. */
          if (!(thd->variables.character_set_client=
                get_charset(uint2korr(charset), MYF(MY_WME))) ||
              !(thd->variables.collation_connection=
                get_charset(uint2korr(charset+2), MYF(MY_WME))) ||
              !(thd->variables.collation_server=
                get_charset(uint2korr(charset+4), MYF(MY_WME))))
          {
            /*
3275 3276 3277 3278
              We updated the thd->variables with nonsensical values (0). Let's
              set them to something safe (i.e. which avoids crash), and we'll
              stop with EE_UNKNOWN_CHARSET in compare_errors (unless set to
              ignore this error).
3279
            */
3280
            set_slave_thread_default_charset(thd, rli);
3281 3282 3283 3284 3285
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
3286 3287 3288
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
3289
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
3290 3291 3292 3293 3294 3295
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308
      if (lc_time_names_number)
      {
        if (!(thd->variables.lc_time_names=
              my_locale_by_number(lc_time_names_number)))
        {
          my_printf_error(ER_UNKNOWN_ERROR,
                      "Unknown locale: '%d'", MYF(0), lc_time_names_number);
          thd->variables.lc_time_names= &my_locale_en_US;
          goto compare_errors;
        }
      }
      else
        thd->variables.lc_time_names= &my_locale_en_US;
3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323
      if (charset_database_number)
      {
        CHARSET_INFO *cs;
        if (!(cs= get_charset(charset_database_number, MYF(0))))
        {
          char buf[20];
          int10_to_str((int) charset_database_number, buf, -10);
          my_error(ER_UNKNOWN_COLLATION, MYF(0), buf);
          goto compare_errors;
        }
        thd->variables.collation_database= cs;
      }
      else
        thd->variables.collation_database= thd->db_charset;
      
3324
      thd->table_map_for_update= (table_map)table_map_for_update;
3325
      thd->set_invoker(&user, &host);
3326
      /* Execute the query (note that we bypass dispatch_command()) */
3327
      const char* found_semicolon= NULL;
3328
      mysql_parse(thd, thd->query(), thd->query_length(), &found_semicolon);
3329
      log_slow_statement(thd);
3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341

      /*
        Resetting the enable_slow_log thd variable.

        We need to reset it back to the opt_log_slow_slave_statements
        value after the statement execution (and slow logging
        is done). It might have changed if the statement was an
        admin statement (in which case, down in mysql_parse execution
        thd->enable_slow_log is set to the value of
        opt_log_slow_admin_statements).
      */
      thd->enable_slow_log= opt_log_slow_slave_statements;
3342
    }
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3343 3344
    else
    {
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3345
      /*
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3346 3347 3348 3349 3350
        The query got a really bad error on the master (thread killed etc),
        which could be inconsistent. Parse it to test the table names: if the
        replicate-*-do|ignore-table rules say "this query must be ignored" then
        we exit gracefully; otherwise we warn about the bad error and tell DBA
        to check/fix it.
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3351
      */
3352
      if (mysql_test_parse_for_slave(thd, thd->query(), thd->query_length()))
3353
        clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
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3354
      else
3355
      {
3356
        rli->report(ERROR_LEVEL, expected_error, 
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3357
                          "\
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3358
Query partially completed on the master (error on master: %d) \
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3359 3360 3361
and was aborted. There is a chance that your master is inconsistent at this \
point. If you are sure that your master is ok, run this query manually on the \
slave and then restart the slave with SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; \
3362
START SLAVE; . Query: '%s'", expected_error, thd->query());
3363
        thd->is_slave_error= 1;
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3364 3365 3366
      }
      goto end;
    }
3367

3368
    /* If the query was not ignored, it is printed to the general log */
3369
    if (!thd->is_error() || thd->main_da.sql_errno() != ER_SLAVE_IGNORED_TABLE)
3370
      general_log_write(thd, COM_QUERY, thd->query(), thd->query_length());
3371

3372
compare_errors:
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3373

3374 3375 3376 3377 3378 3379 3380
    /*
      In the slave thread, we may sometimes execute some DROP / * 40005
      TEMPORARY * / TABLE that come from parts of binlogs (likely if we
      use RESET SLAVE or CHANGE MASTER TO), while the temporary table
      has already been dropped. To ignore such irrelevant "table does
      not exist errors", we silently clear the error if TEMPORARY was used.
    */
3381
    if (thd->lex->sql_command == SQLCOM_DROP_TABLE && thd->lex->drop_temporary &&
3382 3383
        thd->is_error() && thd->main_da.sql_errno() == ER_BAD_TABLE_ERROR &&
        !expected_error)
3384
      thd->main_da.reset_diagnostics_area();
3385
    /*
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3386
      If we expected a non-zero error code, and we don't get the same error
3387
      code, and it should be ignored or is related to a concurrency issue.
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3388
    */
3389 3390 3391
    actual_error= thd->is_error() ? thd->main_da.sql_errno() : 0;
    DBUG_PRINT("info",("expected_error: %d  sql_errno: %d",
 		       expected_error, actual_error));
3392 3393
    if ((expected_error && expected_error != actual_error &&
         !concurrency_error_code(expected_error)) &&
3394 3395
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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3396
    {
3397
      rli->report(ERROR_LEVEL, 0,
3398 3399
                      "\
Query caused different errors on master and slave.     \
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Luis Soares committed
3400
Error on master: message (format)='%s' error code=%d ; \
3401
Error on slave: actual message='%s', error code=%d. \
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3402
Default database: '%s'. Query: '%s'",
3403 3404
                      ER_SAFE(expected_error),
                      expected_error,
3405
                      actual_error ? thd->main_da.message() : "no error",
3406 3407
                      actual_error,
                      print_slave_db_safe(db), query_arg);
3408
      thd->is_slave_error= 1;
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3409 3410
    }
    /*
3411 3412
      If we get the same error code as expected and it is not a concurrency
      issue, or should be ignored.
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3413
    */
3414 3415
    else if ((expected_error == actual_error && 
              !concurrency_error_code(expected_error)) ||
3416
 	     ignored_error_code(actual_error))
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3417 3418
    {
      DBUG_PRINT("info",("error ignored"));
3419
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
3420
      thd->killed= THD::NOT_KILLED;
3421 3422 3423 3424 3425 3426 3427 3428 3429
      /*
        When an error is expected and matches the actual error the
        slave does not report any error and by consequence changes
        on transactional tables are not rolled back in the function
        close_thread_tables(). For that reason, we explicitly roll
        them back here.
      */
      if (expected_error && expected_error == actual_error)
        ha_autocommit_or_rollback(thd, TRUE);
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3430
    }
3431 3432 3433 3434 3435 3436 3437 3438
    /*
      If we expected a non-zero error code and get nothing and, it is a concurrency
      issue or should be ignored.
    */
    else if (expected_error && !actual_error && 
             (concurrency_error_code(expected_error) ||
              ignored_error_code(expected_error)))
      ha_autocommit_or_rollback(thd, TRUE);
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3439 3440
    /*
      Other cases: mostly we expected no error and get one.
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3441
    */
3442
    else if (thd->is_slave_error || thd->is_fatal_error)
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3443
    {
3444
      rli->report(ERROR_LEVEL, actual_error,
3445
                      "Error '%s' on query. Default database: '%s'. Query: '%s'",
3446
                      (actual_error ? thd->main_da.message() :
3447 3448
                       "unexpected success or fatal error"),
                      print_slave_db_safe(thd->db), query_arg);
3449
      thd->is_slave_error= 1;
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3450
    }
3451 3452 3453 3454 3455 3456 3457 3458 3459

    /*
      TODO: compare the values of "affected rows" around here. Something
      like:
      if ((uint32) affected_in_event != (uint32) affected_on_slave)
      {
      sql_print_error("Slave: did not get the expected number of affected \
      rows running query from master - expected %d, got %d (this numbers \
      should have matched modulo 4294967296).", 0, ...);
3460
      thd->is_slave_error = 1;
3461 3462 3463 3464
      }
      We may also want an option to tell the slave to ignore "affected"
      mismatch. This mismatch could be implemented with a new ER_ code, and
      to ignore it you would use --slave-skip-errors...
3465

3466 3467 3468 3469 3470 3471 3472
      To do the comparison we need to know the value of "affected" which the
      above mysql_parse() computed. And we need to know the value of
      "affected" in the master's binlog. Both will be implemented later. The
      important thing is that we now have the format ready to log the values
      of "affected" in the binlog. So we can release 5.0.0 before effectively
      logging "affected" and effectively comparing it.
    */
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3473 3474
  } /* End of if (db_ok(... */

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3475
end:
3476 3477 3478 3479 3480 3481
  /*
    Probably we have set thd->query, thd->db, thd->catalog to point to places
    in the data_buf of this event. Now the event is going to be deleted
    probably, so data_buf will be freed, so the thd->... listed above will be
    pointers to freed memory. 
    So we must set them to 0, so that those bad pointers values are not later
3482 3483 3484
    used. Note that "cleanup" queries like automatic DROP TEMPORARY TABLE
    don't suffer from these assignments to 0 as DROP TEMPORARY
    TABLE uses the db.table syntax.
3485
  */
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3486
  thd->catalog= 0;
3487
  thd->set_db(NULL, 0);                 /* will free the current database */
3488
  thd->set_query(NULL, 0);
3489
  DBUG_PRINT("info", ("end: query= 0"));
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3490
  close_thread_tables(thd);      
3491 3492 3493 3494 3495 3496 3497 3498 3499 3500
  /*
    As a disk space optimization, future masters will not log an event for
    LAST_INSERT_ID() if that function returned 0 (and thus they will be able
    to replace the THD::stmt_depends_on_first_successful_insert_id_in_prev_stmt
    variable by (THD->first_successful_insert_id_in_prev_stmt > 0) ; with the
    resetting below we are ready to support that.
  */
  thd->first_successful_insert_id_in_prev_stmt_for_binlog= 0;
  thd->first_successful_insert_id_in_prev_stmt= 0;
  thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 0;
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3501
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3502
  return thd->is_slave_error;
3503 3504
}

3505
int Query_log_event::do_update_pos(Relay_log_info *rli)
3506
{
3507
  /*
3508 3509 3510
    Note that we will not increment group* positions if we are just
    after a SET ONE_SHOT, because SET ONE_SHOT should not be separated
    from its following updating query.
3511
  */
3512 3513 3514 3515 3516 3517 3518
  if (thd->one_shot_set)
  {
    rli->inc_event_relay_log_pos();
    return 0;
  }
  else
    return Log_event::do_update_pos(rli);
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3519
}
3520 3521


3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545
Log_event::enum_skip_reason
Query_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Query_log_event::do_shall_skip");
  DBUG_PRINT("debug", ("query: %s; q_len: %d", query, q_len));
  DBUG_ASSERT(query && q_len > 0);

  if (rli->slave_skip_counter > 0)
  {
    if (strcmp("BEGIN", query) == 0)
    {
      thd->options|= OPTION_BEGIN;
      DBUG_RETURN(Log_event::continue_group(rli));
    }

    if (strcmp("COMMIT", query) == 0 || strcmp("ROLLBACK", query) == 0)
    {
      thd->options&= ~OPTION_BEGIN;
      DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
    }
  }
  DBUG_RETURN(Log_event::do_shall_skip(rli));
}

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SCRUM  
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3546
#endif
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3547

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3548

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3549
/**************************************************************************
3550
	Start_log_event_v3 methods
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3551
**************************************************************************/
3552

3553
#ifndef MYSQL_CLIENT
3554 3555
Start_log_event_v3::Start_log_event_v3()
  :Log_event(), created(0), binlog_version(BINLOG_VERSION),
3556
   dont_set_created(0)
3557 3558 3559 3560 3561
{
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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3562
/*
3563
  Start_log_event_v3::pack_info()
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3564
*/
3565

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3566
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3567
void Start_log_event_v3::pack_info(Protocol *protocol)
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{
3569 3570 3571 3572
  char buf[12 + ST_SERVER_VER_LEN + 14 + 22], *pos;
  pos= strmov(buf, "Server ver: ");
  pos= strmov(pos, server_version);
  pos= strmov(pos, ", Binlog ver: ");
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  pos= int10_to_str(binlog_version, pos, 10);
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
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}
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3576
#endif
3577 3578


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3579
/*
3580
  Start_log_event_v3::print()
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3581
*/
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3582 3583

#ifdef MYSQL_CLIENT
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3584
void Start_log_event_v3::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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3585
{
3586 3587 3588 3589 3590
  DBUG_ENTER("Start_log_event_v3::print");

  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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3591
  if (!print_event_info->short_form)
3592
  {
3593 3594 3595 3596
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tStart: binlog v %d, server v %s created ",
                binlog_version, server_version);
    print_timestamp(&cache);
3597
    if (created)
3598 3599
      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
3600
    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
3601 3602
      my_b_printf(&cache, "# Warning: this binlog is either in use or was not "
                  "closed properly.\n");
3603
  }
3604
  if (!is_artificial_event() && created)
3605
  {
3606
#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
3607 3608 3609 3610 3611 3612
    /*
      This is for mysqlbinlog: like in replication, we want to delete the stale
      tmp files left by an unclean shutdown of mysqld (temporary tables)
      and rollback unfinished transaction.
      Probably this can be done with RESET CONNECTION (syntax to be defined).
    */
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3613
    my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
3614
#else
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3615
    my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
3616
#endif
3617
  }
3618 3619 3620 3621
  if (temp_buf &&
      print_event_info->base64_output_mode != BASE64_OUTPUT_NEVER &&
      !print_event_info->short_form)
  {
3622 3623
    if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
      my_b_printf(&cache, "BINLOG '\n");
3624 3625 3626
    print_base64(&cache, print_event_info, FALSE);
    print_event_info->printed_fd_event= TRUE;
  }
3627
  DBUG_VOID_RETURN;
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3628
}
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3629
#endif /* MYSQL_CLIENT */
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3630

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3631
/*
3632
  Start_log_event_v3::Start_log_event_v3()
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3633
*/
3634

3635
Start_log_event_v3::Start_log_event_v3(const char* buf,
3636 3637
                                       const Format_description_log_event
                                       *description_event)
3638
  :Log_event(buf, description_event)
3639
{
3640 3641
  buf+= description_event->common_header_len;
  binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
3642 3643
  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
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3644 3645
  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
3646
  created= uint4korr(buf+ST_CREATED_OFFSET);
3647
  dont_set_created= 1;
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3648 3649
}

3650

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3651
/*
3652
  Start_log_event_v3::write()
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3653
*/
3654

3655
#ifndef MYSQL_CLIENT
3656
bool Start_log_event_v3::write(IO_CACHE* file)
3657
{
3658
  char buff[START_V3_HEADER_LEN];
3659 3660
  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy(buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
3661 3662
  if (!dont_set_created)
    created= when= get_time();
3663
  int4store(buff + ST_CREATED_OFFSET,created);
3664
  return (write_header(file, sizeof(buff)) ||
3665
          my_b_safe_write(file, (uchar*) buff, sizeof(buff)));
3666
}
3667
#endif
3668

3669

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3670
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3671

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3672 3673
/**
  Start_log_event_v3::do_apply_event() .
3674 3675
  The master started

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3676
    IMPLEMENTATION
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3677
    - To handle the case where the master died without having time to write
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3678 3679 3680
    DROP TEMPORARY TABLE, DO RELEASE_LOCK (prepared statements' deletion is
    TODO), we clean up all temporary tables that we got, if we are sure we
    can (see below).
3681

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3682
  @todo
3683
    - Remove all active user locks.
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3684 3685 3686 3687
    Guilhem 2003-06: this is true but not urgent: the worst it can cause is
    the use of a bit of memory for a user lock which will not be used
    anymore. If the user lock is later used, the old one will be released. In
    other words, no deadlock problem.
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3688 3689
*/

3690
int Start_log_event_v3::do_apply_event(Relay_log_info const *rli)
3691
{
3692
  DBUG_ENTER("Start_log_event_v3::do_apply_event");
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3693 3694
  switch (binlog_version)
  {
3695 3696 3697 3698 3699 3700 3701
  case 3:
  case 4:
    /*
      This can either be 4.x (then a Start_log_event_v3 is only at master
      startup so we are sure the master has restarted and cleared his temp
      tables; the event always has 'created'>0) or 5.0 (then we have to test
      'created').
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3702
    */
3703 3704 3705 3706 3707
    if (created)
    {
      close_temporary_tables(thd);
      cleanup_load_tmpdir();
    }
3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718
    else
    {
      /*
        Set all temporary tables thread references to the current thread
        as they may point to the "old" SQL slave thread in case of its
        restart.
      */
      TABLE *table;
      for (table= thd->temporary_tables; table; table= table->next)
        table->in_use= thd;
    }
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    break;

3721
    /*
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3722 3723
       Now the older formats; in that case load_tmpdir is cleaned up by the I/O
       thread.
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3724
    */
3725
  case 1:
3726
    if (strncmp(rli->relay_log.description_event_for_exec->server_version,
3727 3728 3729 3730 3731 3732 3733 3734
                "3.23.57",7) >= 0 && created)
    {
      /*
        Can distinguish, based on the value of 'created': this event was
        generated at master startup.
      */
      close_temporary_tables(thd);
    }
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3735
    /*
3736 3737 3738
      Otherwise, can't distinguish a Start_log_event generated at
      master startup and one generated by master FLUSH LOGS, so cannot
      be sure temp tables have to be dropped. So do nothing.
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3739 3740 3741 3742
    */
    break;
  default:
    /* this case is impossible */
3743
    DBUG_RETURN(1);
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3744
  }
3745
  DBUG_RETURN(0);
3746
}
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3747
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3748

3749 3750 3751 3752
/***************************************************************************
       Format_description_log_event methods
****************************************************************************/

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/**
3754 3755 3756 3757 3758 3759
  Format_description_log_event 1st ctor.

    Ctor. Can be used to create the event to write to the binary log (when the
    server starts or when FLUSH LOGS), or to create artificial events to parse
    binlogs from MySQL 3.23 or 4.x.
    When in a client, only the 2nd use is possible.
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  @param binlog_version         the binlog version for which we want to build
                                an event. Can be 1 (=MySQL 3.23), 3 (=4.0.x
                                x>=2 and 4.1) or 4 (MySQL 5.0). Note that the
                                old 4.0 (binlog version 2) is not supported;
                                it should not be used for replication with
                                5.0.
3767 3768 3769
*/

Format_description_log_event::
3770
Format_description_log_event(uint8 binlog_ver, const char* server_ver)
3771
  :Start_log_event_v3(), event_type_permutation(0)
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{
  binlog_version= binlog_ver;
  switch (binlog_ver) {
  case 4: /* MySQL 5.0 */
    memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
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    DBUG_EXECUTE_IF("pretend_version_50034_in_binlog",
                    strmov(server_version, "5.0.34"););
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    common_header_len= LOG_EVENT_HEADER_LEN;
    number_of_event_types= LOG_EVENT_TYPES;
    /* we'll catch my_malloc() error in is_valid() */
    post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
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                                       MYF(0));

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    /*
      This long list of assignments is not beautiful, but I see no way to
      make it nicer, as the right members are #defines, not array members, so
      it's impossible to write a loop.
    */
    if (post_header_len)
    {
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      // Allows us to sanity-check that all events initialized their
      // events (see the end of this 'if' block).
      IF_DBUG(memset(post_header_len, 255,
                     number_of_event_types*sizeof(uint8)););

      /* Note: all event types must explicitly fill in their lengths here. */
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      post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
      post_header_len[QUERY_EVENT-1]= QUERY_HEADER_LEN;
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      post_header_len[STOP_EVENT-1]= STOP_HEADER_LEN;
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      post_header_len[ROTATE_EVENT-1]= ROTATE_HEADER_LEN;
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      post_header_len[INTVAR_EVENT-1]= INTVAR_HEADER_LEN;
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      post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
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      post_header_len[SLAVE_EVENT-1]= SLAVE_HEADER_LEN;
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      post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
      post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
      post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
      post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
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      post_header_len[NEW_LOAD_EVENT-1]= NEW_LOAD_HEADER_LEN;
      post_header_len[RAND_EVENT-1]= RAND_HEADER_LEN;
      post_header_len[USER_VAR_EVENT-1]= USER_VAR_HEADER_LEN;
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      post_header_len[FORMAT_DESCRIPTION_EVENT-1]= FORMAT_DESCRIPTION_HEADER_LEN;
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      post_header_len[XID_EVENT-1]= XID_HEADER_LEN;
      post_header_len[BEGIN_LOAD_QUERY_EVENT-1]= BEGIN_LOAD_QUERY_HEADER_LEN;
      post_header_len[EXECUTE_LOAD_QUERY_EVENT-1]= EXECUTE_LOAD_QUERY_HEADER_LEN;
      /*
        The PRE_GA events are never be written to any binlog, but
        their lengths are included in Format_description_log_event.
        Hence, we need to be assign some value here, to avoid reading
        uninitialized memory when the array is written to disk.
      */
      post_header_len[PRE_GA_WRITE_ROWS_EVENT-1] = 0;
      post_header_len[PRE_GA_UPDATE_ROWS_EVENT-1] = 0;
      post_header_len[PRE_GA_DELETE_ROWS_EVENT-1] = 0;

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      post_header_len[TABLE_MAP_EVENT-1]=    TABLE_MAP_HEADER_LEN;
      post_header_len[WRITE_ROWS_EVENT-1]=   ROWS_HEADER_LEN;
      post_header_len[UPDATE_ROWS_EVENT-1]=  ROWS_HEADER_LEN;
      post_header_len[DELETE_ROWS_EVENT-1]=  ROWS_HEADER_LEN;
      /*
        We here have the possibility to simulate a master of before we changed
        the table map id to be stored in 6 bytes: when it was stored in 4
        bytes (=> post_header_len was 6). This is used to test backward
        compatibility.
        This code can be removed after a few months (today is Dec 21st 2005),
        when we know that the 4-byte masters are not deployed anymore (check
        with Tomas Ulin first!), and the accompanying test (rpl_row_4_bytes)
        too.
      */
      DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                      post_header_len[TABLE_MAP_EVENT-1]=
                      post_header_len[WRITE_ROWS_EVENT-1]=
                      post_header_len[UPDATE_ROWS_EVENT-1]=
                      post_header_len[DELETE_ROWS_EVENT-1]= 6;);
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      post_header_len[INCIDENT_EVENT-1]= INCIDENT_HEADER_LEN;
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      // Sanity-check that all post header lengths are initialized.
      IF_DBUG({
          int i;
          for (i=0; i<number_of_event_types; i++)
            assert(post_header_len[i] != 255);
        });
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    }
    break;

  case 1: /* 3.23 */
  case 3: /* 4.0.x x>=2 */
    /*
      We build an artificial (i.e. not sent by the master) event, which
      describes what those old master versions send.
    */
    if (binlog_ver==1)
      strmov(server_version, server_ver ? server_ver : "3.23");
    else
      strmov(server_version, server_ver ? server_ver : "4.0");
    common_header_len= binlog_ver==1 ? OLD_HEADER_LEN :
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      LOG_EVENT_MINIMAL_HEADER_LEN;
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    /*
      The first new event in binlog version 4 is Format_desc. So any event type
      after that does not exist in older versions. We use the events known by
      version 3, even if version 1 had only a subset of them (this is not a
      problem: it uses a few bytes for nothing but unifies code; it does not
      make the slave detect less corruptions).
    */
    number_of_event_types= FORMAT_DESCRIPTION_EVENT - 1;
    post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
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                                       MYF(0));
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    if (post_header_len)
    {
      post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
      post_header_len[QUERY_EVENT-1]= QUERY_HEADER_MINIMAL_LEN;
      post_header_len[STOP_EVENT-1]= 0;
      post_header_len[ROTATE_EVENT-1]= (binlog_ver==1) ? 0 : ROTATE_HEADER_LEN;
      post_header_len[INTVAR_EVENT-1]= 0;
      post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
      post_header_len[SLAVE_EVENT-1]= 0;
      post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
      post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
      post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
      post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
      post_header_len[NEW_LOAD_EVENT-1]= post_header_len[LOAD_EVENT-1];
      post_header_len[RAND_EVENT-1]= 0;
      post_header_len[USER_VAR_EVENT-1]= 0;
    }
    break;
  default: /* Includes binlog version 2 i.e. 4.0.x x<=1 */
    post_header_len= 0; /* will make is_valid() fail */
    break;
  }
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  calc_server_version_split();
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}


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/**
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  The problem with this constructor is that the fixed header may have a
  length different from this version, but we don't know this length as we
  have not read the Format_description_log_event which says it, yet. This
  length is in the post-header of the event, but we don't know where the
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  post-header starts.
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  So this type of event HAS to:
  - either have the header's length at the beginning (in the header, at a
  fixed position which will never be changed), not in the post-header. That
  would make the header be "shifted" compared to other events.
  - or have a header of size LOG_EVENT_MINIMAL_HEADER_LEN (19), in all future
  versions, so that we know for sure.
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  I (Guilhem) chose the 2nd solution. Rotate has the same constraint (because
  it is sent before Format_description_log_event).
*/

Format_description_log_event::
Format_description_log_event(const char* buf,
                             uint event_len,
                             const
                             Format_description_log_event*
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                             description_event)
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  :Start_log_event_v3(buf, description_event), event_type_permutation(0)
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{
  DBUG_ENTER("Format_description_log_event::Format_description_log_event(char*,...)");
  buf+= LOG_EVENT_MINIMAL_HEADER_LEN;
  if ((common_header_len=buf[ST_COMMON_HEADER_LEN_OFFSET]) < OLD_HEADER_LEN)
    DBUG_VOID_RETURN; /* sanity check */
  number_of_event_types=
    event_len-(LOG_EVENT_MINIMAL_HEADER_LEN+ST_COMMON_HEADER_LEN_OFFSET+1);
  DBUG_PRINT("info", ("common_header_len=%d number_of_event_types=%d",
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                      common_header_len, number_of_event_types));
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  /* If alloc fails, we'll detect it in is_valid() */
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  post_header_len= (uint8*) my_memdup((uchar*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
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                                      number_of_event_types*
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                                      sizeof(*post_header_len), MYF(0));
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  calc_server_version_split();
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  /*
    In some previous versions, the events were given other event type
    id numbers than in the present version. When replicating from such
    a version, we therefore set up an array that maps those id numbers
    to the id numbers of the present server.

    If post_header_len is null, it means malloc failed, and is_valid
    will fail, so there is no need to do anything.

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    The trees in which events have wrong id's are:

    mysql-5.1-wl1012.old mysql-5.1-wl2325-5.0-drop6p13-alpha
    mysql-5.1-wl2325-5.0-drop6 mysql-5.1-wl2325-5.0
    mysql-5.1-wl2325-no-dd

    (this was found by grepping for two lines in sequence where the
    first matches "FORMAT_DESCRIPTION_EVENT," and the second matches
    "TABLE_MAP_EVENT," in log_event.h in all trees)

    In these trees, the following server_versions existed since
    TABLE_MAP_EVENT was introduced:

    5.1.1-a_drop5p3   5.1.1-a_drop5p4        5.1.1-alpha
    5.1.2-a_drop5p10  5.1.2-a_drop5p11       5.1.2-a_drop5p12
    5.1.2-a_drop5p13  5.1.2-a_drop5p14       5.1.2-a_drop5p15
    5.1.2-a_drop5p16  5.1.2-a_drop5p16b      5.1.2-a_drop5p16c
    5.1.2-a_drop5p17  5.1.2-a_drop5p4        5.1.2-a_drop5p5
    5.1.2-a_drop5p6   5.1.2-a_drop5p7        5.1.2-a_drop5p8
    5.1.2-a_drop5p9   5.1.3-a_drop5p17       5.1.3-a_drop5p17b
    5.1.3-a_drop5p17c 5.1.4-a_drop5p18       5.1.4-a_drop5p19
    5.1.4-a_drop5p20  5.1.4-a_drop6p0        5.1.4-a_drop6p1
    5.1.4-a_drop6p2   5.1.5-a_drop5p20       5.2.0-a_drop6p3
    5.2.0-a_drop6p4   5.2.0-a_drop6p5        5.2.0-a_drop6p6
    5.2.1-a_drop6p10  5.2.1-a_drop6p11       5.2.1-a_drop6p12
    5.2.1-a_drop6p6   5.2.1-a_drop6p7        5.2.1-a_drop6p8
    5.2.2-a_drop6p13  5.2.2-a_drop6p13-alpha 5.2.2-a_drop6p13b
    5.2.2-a_drop6p13c

    (this was found by grepping for "mysql," in all historical
    versions of configure.in in the trees listed above).

    There are 5.1.1-alpha versions that use the new event id's, so we
    do not test that version string.  So replication from 5.1.1-alpha
    with the other event id's to a new version does not work.
    Moreover, we can safely ignore the part after drop[56].  This
    allows us to simplify the big list above to the following regexes:

    5\.1\.[1-5]-a_drop5.*
    5\.1\.4-a_drop6.*
    5\.2\.[0-2]-a_drop6.*

    This is what we test for in the 'if' below.
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  */
  if (post_header_len &&
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      server_version[0] == '5' && server_version[1] == '.' &&
      server_version[3] == '.' &&
      strncmp(server_version + 5, "-a_drop", 7) == 0 &&
      ((server_version[2] == '1' &&
        server_version[4] >= '1' && server_version[4] <= '5' &&
        server_version[12] == '5') ||
       (server_version[2] == '1' &&
        server_version[4] == '4' &&
        server_version[12] == '6') ||
       (server_version[2] == '2' &&
        server_version[4] >= '0' && server_version[4] <= '2' &&
        server_version[12] == '6')))
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  {
    if (number_of_event_types != 22)
    {
      DBUG_PRINT("info", (" number_of_event_types=%d",
                          number_of_event_types));
      /* this makes is_valid() return false. */
      my_free(post_header_len, MYF(MY_ALLOW_ZERO_PTR));
      post_header_len= NULL;
      DBUG_VOID_RETURN;
    }
    static const uint8 perm[23]=
      {
        UNKNOWN_EVENT, START_EVENT_V3, QUERY_EVENT, STOP_EVENT, ROTATE_EVENT,
        INTVAR_EVENT, LOAD_EVENT, SLAVE_EVENT, CREATE_FILE_EVENT,
        APPEND_BLOCK_EVENT, EXEC_LOAD_EVENT, DELETE_FILE_EVENT,
        NEW_LOAD_EVENT,
        RAND_EVENT, USER_VAR_EVENT,
        FORMAT_DESCRIPTION_EVENT,
        TABLE_MAP_EVENT,
        PRE_GA_WRITE_ROWS_EVENT,
        PRE_GA_UPDATE_ROWS_EVENT,
        PRE_GA_DELETE_ROWS_EVENT,
        XID_EVENT,
        BEGIN_LOAD_QUERY_EVENT,
        EXECUTE_LOAD_QUERY_EVENT,
      };
    event_type_permutation= perm;
    /*
      Since we use (permuted) event id's to index the post_header_len
      array, we need to permute the post_header_len array too.
    */
    uint8 post_header_len_temp[23];
    for (int i= 1; i < 23; i++)
      post_header_len_temp[perm[i] - 1]= post_header_len[i - 1];
    for (int i= 0; i < 22; i++)
      post_header_len[i] = post_header_len_temp[i];
  }
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  DBUG_VOID_RETURN;
}

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#ifndef MYSQL_CLIENT
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bool Format_description_log_event::write(IO_CACHE* file)
{
  /*
    We don't call Start_log_event_v3::write() because this would make 2
    my_b_safe_write().
  */
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  uchar buff[FORMAT_DESCRIPTION_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
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  if (!dont_set_created)
    created= when= get_time();
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  int4store(buff + ST_CREATED_OFFSET,created);
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  buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
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  memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (uchar*) post_header_len,
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         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
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4071
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
4073
{
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  int ret= 0;
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  DBUG_ENTER("Format_description_log_event::do_apply_event");
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#ifdef USING_TRANSACTIONS
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  /*
    As a transaction NEVER spans on 2 or more binlogs:
    if we have an active transaction at this point, the master died
    while writing the transaction to the binary log, i.e. while
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    flushing the binlog cache to the binlog. XA guarantees that master has
    rolled back. So we roll back.
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    Note: this event could be sent by the master to inform us of the
    format of its binlog; in other words maybe it is not at its
    original place when it comes to us; we'll know this by checking
    log_pos ("artificial" events have log_pos == 0).
  */
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  if (!is_artificial_event() && created && thd->transaction.all.ha_list)
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  {
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    /* This is not an error (XA is safe), just an information */
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    rli->report(INFORMATION_LEVEL, 0,
                "Rolling back unfinished transaction (no COMMIT "
                "or ROLLBACK in relay log). A probable cause is that "
                "the master died while writing the transaction to "
                "its binary log, thus rolled back too."); 
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    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 1);
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  }
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#endif
4100
  /*
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    If this event comes from ourselves, there is no cleaning task to
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    perform, we don't call Start_log_event_v3::do_apply_event()
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    (this was just to update the log's description event).
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  */
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  if (server_id != (uint32) ::server_id)
  {
    /*
      If the event was not requested by the slave i.e. the master sent
      it while the slave asked for a position >4, the event will make
      rli->group_master_log_pos advance. Say that the slave asked for
      position 1000, and the Format_desc event's end is 96. Then in
      the beginning of replication rli->group_master_log_pos will be
      0, then 96, then jump to first really asked event (which is
      >96). So this is ok.
    */
4116
    ret= Start_log_event_v3::do_apply_event(rli);
4117
  }
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  if (!ret)
  {
    /* Save the information describing this binlog */
    delete rli->relay_log.description_event_for_exec;
    const_cast<Relay_log_info *>(rli)->relay_log.description_event_for_exec= this;
  }

  DBUG_RETURN(ret);
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}

4129
int Format_description_log_event::do_update_pos(Relay_log_info *rli)
4130
{
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  if (server_id == (uint32) ::server_id)
  {
    /*
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      We only increase the relay log position if we are skipping
      events and do not touch any group_* variables, nor flush the
      relay log info.  If there is a crash, we will have to re-skip
      the events again, but that is a minor issue.

      If we do not skip stepping the group log position (and the
      server id was changed when restarting the server), it might well
      be that we start executing at a position that is invalid, e.g.,
      at a Rows_log_event or a Query_log_event preceeded by a
      Intvar_log_event instead of starting at a Table_map_log_event or
      the Intvar_log_event respectively.
     */
    rli->inc_event_relay_log_pos();
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    return 0;
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  }
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  else
  {
    return Log_event::do_update_pos(rli);
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  }
}

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Log_event::enum_skip_reason
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Format_description_log_event::do_shall_skip(Relay_log_info *rli)
4157
{
4158
  return Log_event::EVENT_SKIP_NOT;
4159
}
4160

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#endif

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/**
   Splits the event's 'server_version' string into three numeric pieces stored
   into 'server_version_split':
   X.Y.Zabc (X,Y,Z numbers, a not a digit) -> {X,Y,Z}
   X.Yabc -> {X,Y,0}
   Xabc -> {X,0,0}
   'server_version_split' is then used for lookups to find if the server which
   created this event has some known bug.
*/
void Format_description_log_event::calc_server_version_split()
{
  char *p= server_version, *r;
  ulong number;
  for (uint i= 0; i<=2; i++)
  {
    number= strtoul(p, &r, 10);
    server_version_split[i]= (uchar)number;
    DBUG_ASSERT(number < 256); // fit in uchar
    p= r;
    DBUG_ASSERT(!((i == 0) && (*r != '.'))); // should be true in practice
    if (*r == '.')
      p++; // skip the dot
  }
  DBUG_PRINT("info",("Format_description_log_event::server_version_split:"
                     " '%s' %d %d %d", server_version,
                     server_version_split[0],
                     server_version_split[1], server_version_split[2]));
}


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  /**************************************************************************
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        Load_log_event methods
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   General note about Load_log_event: the binlogging of LOAD DATA INFILE is
4197
   going to be changed in 5.0 (or maybe in 5.1; not decided yet).
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   However, the 5.0 slave could still have to read such events (from a 4.x
   master), convert them (which just means maybe expand the header, when 5.0
   servers have a UID in events) (remember that whatever is after the header
   will be like in 4.x, as this event's format is not modified in 5.0 as we
   will use new types of events to log the new LOAD DATA INFILE features).
   To be able to read/convert, we just need to not assume that the common
   header is of length LOG_EVENT_HEADER_LEN (we must use the description
   event).
   Note that I (Guilhem) manually tested replication of a big LOAD DATA INFILE
   between 3.23 and 5.0, and between 4.0 and 5.0, and it works fine (and the
   positions displayed in SHOW SLAVE STATUS then are fine too).
  **************************************************************************/
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/*
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  Load_log_event::pack_info()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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uint Load_log_event::get_query_buffer_length()
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{
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  return
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    5 + db_len + 3 +                        // "use DB; "
    18 + fname_len + 2 +                    // "LOAD DATA INFILE 'file''"
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    11 +                                    // "CONCURRENT "
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    7 +					    // LOCAL
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    9 +                                     // " REPLACE or IGNORE "
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    13 + table_name_len*2 +                 // "INTO TABLE `table`"
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    21 + sql_ex.field_term_len*4 + 2 +      // " FIELDS TERMINATED BY 'str'"
    23 + sql_ex.enclosed_len*4 + 2 +        // " OPTIONALLY ENCLOSED BY 'str'"
    12 + sql_ex.escaped_len*4 + 2 +         // " ESCAPED BY 'str'"
4228
    21 + sql_ex.line_term_len*4 + 2 +       // " LINES TERMINATED BY 'str'"
4229 4230
    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'"
    15 + 22 +                               // " IGNORE xxx  LINES"
4231
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
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}
4233

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4234

4235
void Load_log_event::print_query(bool need_db, const char *cs, char *buf,
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                                 char **end, char **fn_start, char **fn_end)
{
  char *pos= buf;

  if (need_db && db && db_len)
4241
  {
4242 4243
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
4245
  }
4246

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  pos= strmov(pos, "LOAD DATA ");
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  if (thd->lex->lock_option == TL_WRITE_CONCURRENT_INSERT)
    pos= strmov(pos, "CONCURRENT ");

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  if (fn_start)
    *fn_start= pos;

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  if (check_fname_outside_temp_buf())
    pos= strmov(pos, "LOCAL ");
  pos= strmov(pos, "INFILE '");
4258
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
4260

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  if (sql_ex.opt_flags & REPLACE_FLAG)
4262
    pos= strmov(pos, "REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
4264
    pos= strmov(pos, "IGNORE ");
4265

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

  pos= strmov(pos ," TABLE `");
4272 4273 4274
  memcpy(pos, table_name, table_name_len);
  pos+= table_name_len;

4275 4276 4277 4278 4279 4280 4281 4282 4283 4284
  if (cs != NULL)
  {
    pos= strmov(pos ,"` CHARACTER SET ");
    pos= strmov(pos ,  cs);
  }
  else
    pos= strmov(pos, "`");

  /* We have to create all optional fields as the default is not empty */
  pos= strmov(pos, " FIELDS TERMINATED BY ");
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  pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len);
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
    pos= strmov(pos, " OPTIONALLY ");
  pos= strmov(pos, " ENCLOSED BY ");
  pos= pretty_print_str(pos, sql_ex.enclosed, sql_ex.enclosed_len);
4290

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
4293

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
4296 4297
  if (sql_ex.line_start_len)
  {
4298
    pos= strmov(pos, " STARTING BY ");
4299
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
4300
  }
4301

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  if ((long) skip_lines > 0)
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  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
4306 4307
    pos= strmov(pos," LINES ");    
  }
4308 4309 4310 4311

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
4313
    pos= strmov(pos, " (");
4314 4315 4316
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
4321
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
4324
    }
4325
    *pos++= ')';
4326
  }
4327

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  *end= pos;
}


void Load_log_event::pack_info(Protocol *protocol)
{
  char *buf, *end;

4336
  if (!(buf= (char*) my_malloc(get_query_buffer_length(), MYF(MY_WME))))
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    return;
4338
  print_query(TRUE, NULL, buf, &end, 0, 0);
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  protocol->store(buf, end-buf, &my_charset_bin);
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  my_free(buf, MYF(0));
4341
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4343

4344

4345 4346
#ifndef MYSQL_CLIENT

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/*
4348
  Load_log_event::write_data_header()
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*/
4350

4351
bool Load_log_event::write_data_header(IO_CACHE* file)
4352
{
4353
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
4355 4356 4357 4358 4359
  int4store(buf + L_EXEC_TIME_OFFSET, exec_time);
  int4store(buf + L_SKIP_LINES_OFFSET, skip_lines);
  buf[L_TBL_LEN_OFFSET] = (char)table_name_len;
  buf[L_DB_LEN_OFFSET] = (char)db_len;
  int4store(buf + L_NUM_FIELDS_OFFSET, num_fields);
4360
  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
4361
}
4362

4363

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/*
4365
  Load_log_event::write_data_body()
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*/
4367

4368
bool Load_log_event::write_data_body(IO_CACHE* file)
4369
{
4370 4371 4372
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
4373
  {
4374 4375
    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
4376
      return 1;
4377
  }
4378 4379 4380
  return (my_b_safe_write(file, (uchar*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (uchar*)db, db_len + 1) ||
	  my_b_safe_write(file, (uchar*)fname, fname_len));
4381 4382
}

4383

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/*
4385
  Load_log_event::Load_log_event()
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*/
4387

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Load_log_event::Load_log_event(THD *thd_arg, sql_exchange *ex,
			       const char *db_arg, const char *table_name_arg,
			       List<Item> &fields_arg,
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			       enum enum_duplicates handle_dup,
4392
			       bool ignore, bool using_trans)
4393
  :Log_event(thd_arg,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
4395
             using_trans),
4396
   thread_id(thd_arg->thread_id),
4397
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
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   table_name(table_name_arg ? table_name_arg : ""),
4401
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
4405
  exec_time = (ulong) (end_time  - thd_arg->start_time);
4406 4407 4408
  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
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  fname_len = (fname) ? (uint) strlen(fname) : 0;
  sql_ex.field_term = (char*) ex->field_term->ptr();
  sql_ex.field_term_len = (uint8) ex->field_term->length();
  sql_ex.enclosed = (char*) ex->enclosed->ptr();
  sql_ex.enclosed_len = (uint8) ex->enclosed->length();
  sql_ex.line_term = (char*) ex->line_term->ptr();
  sql_ex.line_term_len = (uint8) ex->line_term->length();
  sql_ex.line_start = (char*) ex->line_start->ptr();
  sql_ex.line_start_len = (uint8) ex->line_start->length();
  sql_ex.escaped = (char*) ex->escaped->ptr();
  sql_ex.escaped_len = (uint8) ex->escaped->length();
  sql_ex.opt_flags = 0;
  sql_ex.cached_new_format = -1;
4422
    
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  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
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  if (ex->opt_enclosed)
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    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
4427

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  sql_ex.empty_flags= 0;
4429

4430
  switch (handle_dup) {
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  case DUP_REPLACE:
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    sql_ex.opt_flags|= REPLACE_FLAG;
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    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
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  }
4438 4439
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
4440

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  if (!ex->field_term->length())
    sql_ex.empty_flags |= FIELD_TERM_EMPTY;
  if (!ex->enclosed->length())
    sql_ex.empty_flags |= ENCLOSED_EMPTY;
  if (!ex->line_term->length())
    sql_ex.empty_flags |= LINE_TERM_EMPTY;
  if (!ex->line_start->length())
    sql_ex.empty_flags |= LINE_START_EMPTY;
  if (!ex->escaped->length())
    sql_ex.empty_flags |= ESCAPED_EMPTY;
4451
    
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  skip_lines = ex->skip_lines;
4453

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  List_iterator<Item> li(fields_arg);
  field_lens_buf.length(0);
  fields_buf.length(0);
  Item* item;
  while ((item = li++))
  {
    num_fields++;
    uchar len = (uchar) strlen(item->name);
    field_block_len += len + 1;
    fields_buf.append(item->name, len + 1);
    field_lens_buf.append((char*)&len, 1);
4465 4466
  }

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
4471

4472

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/**
  @note
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    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
4477
*/
4478 4479 4480 4481
Load_log_event::Load_log_event(const char *buf, uint event_len,
                               const Format_description_log_event *description_event)
  :Log_event(buf, description_event), num_fields(0), fields(0),
   field_lens(0),field_block_len(0),
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   table_name(0), db(0), fname(0), local_fname(FALSE)
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{
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  DBUG_ENTER("Load_log_event");
4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496
  /*
    I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
    4.0->5.0 and 5.0->5.0 and it works.
  */
  if (event_len)
    copy_log_event(buf, event_len,
                   ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                    LOAD_HEADER_LEN + 
                    description_event->common_header_len :
                    LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
                   description_event);
  /* otherwise it's a derived class, will call copy_log_event() itself */
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  DBUG_VOID_RETURN;
4498 4499
}

4500

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/*
4502
  Load_log_event::copy_log_event()
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4503
*/
4504

4505
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
4506 4507
                                   int body_offset,
                                   const Format_description_log_event *description_event)
4508
{
4509
  DBUG_ENTER("Load_log_event::copy_log_event");
4510
  uint data_len;
4511
  char* buf_end = (char*)buf + event_len;
4512 4513
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
4515 4516 4517 4518 4519
  exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
  skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
  table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];
  db_len = (uint)data_head[L_DB_LEN_OFFSET];
  num_fields = uint4korr(data_head + L_NUM_FIELDS_OFFSET);
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  if ((int) event_len < body_offset)
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    DBUG_RETURN(1);
4523 4524 4525 4526
  /*
    Sql_ex.init() on success returns the pointer to the first byte after
    the sql_ex structure, which is the start of field lengths array.
  */
4527 4528 4529
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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    DBUG_RETURN(1);
4531
  
4532
  data_len = event_len - body_offset;
4533
  if (num_fields > data_len) // simple sanity check against corruption
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    DBUG_RETURN(1);
4535
  for (uint i = 0; i < num_fields; i++)
4536
    field_block_len += (uint)field_lens[i] + 1;
4537

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  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
4542
  fname_len = (uint) strlen(fname);
4543
  // null termination is accomplished by the caller doing buf[event_len]=0
4544

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  DBUG_RETURN(0);
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}


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/*
4550
  Load_log_event::print()
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*/
4552 4553

#ifdef MYSQL_CLIENT
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void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
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  print(file, print_event_info, 0);
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}

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4560
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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			   bool commented)
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{
4563 4564
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  DBUG_ENTER("Load_log_event::print");
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  if (!print_event_info->short_form)
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  {
4568 4569 4570
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
                thread_id, exec_time);
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  }

4573
  bool different_db= 1;
4574
  if (db)
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  {
4576 4577 4578 4579 4580 4581
    /*
      If the database is different from the one of the previous statement, we
      need to print the "use" command, and we update the last_db.
      But if commented, the "use" is going to be commented so we should not
      update the last_db.
    */
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    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
4583
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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  }
4586
  
4587
  if (db && db[0] && different_db)
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    my_b_printf(&cache, "%suse %s%s\n", 
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            commented ? "# " : "",
4590
            db, print_event_info->delimiter);
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4592
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
4594 4595
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
4596
  my_b_printf(&cache, "%sLOAD DATA ",
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              commented ? "# " : "");
4598
  if (check_fname_outside_temp_buf())
4599 4600
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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4601

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4602
  if (sql_ex.opt_flags & REPLACE_FLAG)
4603
    my_b_printf(&cache,"REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
4605
    my_b_printf(&cache,"IGNORE ");
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4607 4608 4609
  my_b_printf(&cache, "INTO TABLE `%s`", table_name);
  my_b_printf(&cache, " FIELDS TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.field_term, sql_ex.field_term_len);
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  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
4612 4613 4614
    my_b_printf(&cache," OPTIONALLY ");
  my_b_printf(&cache, " ENCLOSED BY ");
  pretty_print_str(&cache, sql_ex.enclosed, sql_ex.enclosed_len);
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4616 4617
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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4619 4620
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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4623
  if (sql_ex.line_start)
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  {
4625 4626
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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  }
4628
  if ((long) skip_lines > 0)
4629
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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4631 4632 4633 4634
  if (num_fields)
  {
    uint i;
    const char* field = fields;
4635
    my_b_printf(&cache, " (");
4636
    for (i = 0; i < num_fields; i++)
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    {
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      if (i)
4639
	my_b_printf(&cache, ",");
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      my_b_printf(&cache, "%s", field);
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4642
      field += field_lens[i]  + 1;
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    }
4644
    my_b_printf(&cache, ")");
4645
  }
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4646

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  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
4651

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4652
#ifndef MYSQL_CLIENT
4653

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/**
4655
  Load_log_event::set_fields()
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4656

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4657 4658 4659 4660 4661
  @note
    This function can not use the member variable 
    for the database, since LOAD DATA INFILE on the slave
    can be for a different database than the current one.
    This is the reason for the affected_db argument to this method.
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*/
4663

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void Load_log_event::set_fields(const char* affected_db, 
4665 4666
				List<Item> &field_list,
                                Name_resolution_context *context)
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{
  uint i;
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  const char* field = fields;
4670
  for (i= 0; i < num_fields; i++)
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  {
4672 4673
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
4674
    field+= field_lens[i]  + 1;
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  }
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}
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#endif /* !MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Does the data loading job when executing a LOAD DATA on the slave.

  @param net
  @param rli
  @param use_rli_only_for_errors     If set to 1, rli is provided to
                                     Load_log_event::exec_event only for this
                                     function to have RPL_LOG_NAME and
                                     rli->last_slave_error, both being used by
                                     error reports. rli's position advancing
                                     is skipped (done by the caller which is
                                     Execute_load_log_event::exec_event).
                                     If set to 0, rli is provided for full use,
                                     i.e. for error reports and position
                                     advancing.

  @todo
    fix this; this can be done by testing rules in
    Create_file_log_event::exec_event() and then discarding Append_block and
    al.
  @todo
    this is a bug - this needs to be moved to the I/O thread

  @retval
4705
    0           Success
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  @retval
    1           Failure
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*/
4709

4710
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
4711
                                   bool use_rli_only_for_errors)
4712
{
4713 4714 4715 4716
  LEX_STRING new_db;
  new_db.length= db_len;
  new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
  thd->set_db(new_db.str, new_db.length);
4717 4718
  DBUG_ASSERT(thd->query() == 0);
  thd->set_query_inner(NULL, 0);               // Should not be needed
4719
  thd->is_slave_error= 0;
4720
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
4721

4722
  /* see Query_log_event::do_apply_event() and BUG#13360 */
4723
  DBUG_ASSERT(!rli->m_table_map.count());
4724
  /*
4725
    Usually lex_start() is called by mysql_parse(), but we need it here
4726 4727
    as the present method does not call mysql_parse().
  */
4728
  lex_start(thd);
4729
  thd->lex->local_file= local_fname;
4730 4731
  mysql_reset_thd_for_next_command(thd);

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  if (!use_rli_only_for_errors)
4733
  {
4734 4735
    /*
      Saved for InnoDB, see comment in
4736
      Query_log_event::do_apply_event()
4737
    */
4738
    const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
4739
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
4740
  }
4741 4742
 
   /*
4743 4744 4745 4746 4747 4748 4749
    We test replicate_*_db rules. Note that we have already prepared
    the file to load, even if we are going to ignore and delete it
    now. So it is possible that we did a lot of disk writes for
    nothing. In other words, a big LOAD DATA INFILE on the master will
    still consume a lot of space on the slave (space in the relay log
    + space of temp files: twice the space of the file to load...)
    even if it will finally be ignored.  TODO: fix this; this can be
4750
    done by testing rules in Create_file_log_event::do_apply_event()
4751 4752 4753
    and then discarding Append_block and al. Another way is do the
    filtering in the I/O thread (more efficient: no disk writes at
    all).
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    Note:   We do not need to execute reset_one_shot_variables() if this
            db_ok() test fails.
    Reason: The db stored in binlog events is the same for SET and for
            its companion query.  If the SET is ignored because of
            db_ok(), the companion query will also be ignored, and if
            the companion query is ignored in the db_ok() test of
4762
            ::do_apply_event(), then the companion SET also have so
4763
            we don't need to reset_one_shot_variables().
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  */
4765
  if (rpl_filter->db_ok(thd->db))
4766
  {
4767 4768
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
4769
    thd->query_id = next_query_id();
4770
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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    /*
      Initing thd->row_count is not necessary in theory as this variable has no
      influence in the case of the slave SQL thread (it is used to generate a
      "data truncated" warning but which is absorbed and never gets to the
      error log); still we init it to avoid a Valgrind message.
    */
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    mysql_reset_errors(thd, 0);
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    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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    tables.db= thd->strmake(thd->db, thd->db_length);
4782
    tables.alias = tables.table_name = (char*) table_name;
4783
    tables.lock_type = TL_WRITE;
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    tables.updating= 1;
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4786
    // the table will be opened in mysql_load    
4787
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
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    {
      // TODO: this is a bug - this needs to be moved to the I/O thread
      if (net)
        skip_load_data_infile(net);
    }
    else
    {
      char llbuff[22];
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      char *end;
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      enum enum_duplicates handle_dup;
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      bool ignore= 0;
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      char *load_data_query;

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      /*
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        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
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      */
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      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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      {
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        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
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      }
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4814
      print_query(FALSE, NULL, load_data_query, &end, NULL, NULL);
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      *end= 0;
4816
      thd->set_query(load_data_query, (uint) (end - load_data_query));
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      if (sql_ex.opt_flags & REPLACE_FLAG)
4819
      {
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	handle_dup= DUP_REPLACE;
4821
      }
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      else if (sql_ex.opt_flags & IGNORE_FLAG)
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      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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      else
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      {
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        /*
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	  When replication is running fine, if it was DUP_ERROR on the
4831
          master then we could choose IGNORE here, because if DUP_ERROR
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          suceeded on master, and data is identical on the master and slave,
4833
          then there should be no uniqueness errors on slave, so IGNORE is
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          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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          (because the data on the master and slave happen to be different
	  (user error or bug), we want LOAD DATA to print an error message on
	  the slave to discover the problem.
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          If reading from net (a 3.23 master), mysql_load() will change this
4840
          to IGNORE.
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        */
        handle_dup= DUP_ERROR;
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      }
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      /*
        We need to set thd->lex->sql_command and thd->lex->duplicates
        since InnoDB tests these variables to decide if this is a LOAD
        DATA ... REPLACE INTO ... statement even though mysql_parse()
        is not called.  This is not needed in 5.0 since there the LOAD
        DATA ... statement is replicated using mysql_parse(), which
        sets the thd->lex fields correctly.
      */
      thd->lex->sql_command= SQLCOM_LOAD;
      thd->lex->duplicates= handle_dup;
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      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
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      String field_term(sql_ex.field_term,sql_ex.field_term_len,log_cs);
      String enclosed(sql_ex.enclosed,sql_ex.enclosed_len,log_cs);
      String line_term(sql_ex.line_term,sql_ex.line_term_len,log_cs);
      String line_start(sql_ex.line_start,sql_ex.line_start_len,log_cs);
      String escaped(sql_ex.escaped,sql_ex.escaped_len, log_cs);
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      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
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      ex.opt_enclosed = (sql_ex.opt_flags & OPT_ENCLOSED_FLAG);
      if (sql_ex.empty_flags & FIELD_TERM_EMPTY)
	ex.field_term->length(0);

      ex.skip_lines = skip_lines;
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      List<Item> field_list;
4873 4874
      thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
      set_fields(tables.db, field_list, &thd->lex->select_lex.context);
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      thd->variables.pseudo_thread_id= thread_id;
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      if (net)
      {
	// mysql_load will use thd->net to read the file
	thd->net.vio = net->vio;
	/*
	  Make sure the client does not get confused about the packet sequence
	*/
	thd->net.pkt_nr = net->pkt_nr;
      }
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      /*
4886
        It is safe to use tmp_list twice because we are not going to
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        update it inside mysql_load().
      */
4889 4890
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
4891
                     handle_dup, ignore, net != 0))
4892
        thd->is_slave_error= 1;
4893
      if (thd->cuted_fields)
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      {
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	/* log_pos is the position of the LOAD event in the master log */
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        sql_print_warning("Slave: load data infile on table '%s' at "
                          "log position %s in log '%s' produced %ld "
                          "warning(s). Default database: '%s'",
                          (char*) table_name,
                          llstr(log_pos,llbuff), RPL_LOG_NAME, 
                          (ulong) thd->cuted_fields,
                          print_slave_db_safe(thd->db));
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      }
4904 4905 4906
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
4907 4908
  }
  else
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  {
    /*
      We will just ask the master to send us /dev/null if we do not
      want to load the data.
      TODO: this a bug - needs to be done in I/O thread
    */
    if (net)
      skip_load_data_infile(net);
  }
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error:
4920
  thd->net.vio = 0; 
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  const char *remember_db= thd->db;
  thd->catalog= 0;
4923
  thd->set_db(NULL, 0);                   /* will free the current database */
4924
  thd->set_query(NULL, 0);
4925
  close_thread_tables(thd);
4926 4927

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
4928
                  thd->is_slave_error= 0; thd->is_fatal_error= 1;);
4929

4930
  if (thd->is_slave_error)
4931
  {
4932
    /* this err/sql_errno code is copy-paste from net_send_error() */
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    const char *err;
    int sql_errno;
4935 4936 4937 4938 4939
    if (thd->is_error())
    {
      err= thd->main_da.message();
      sql_errno= thd->main_da.sql_errno();
    }
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    else
    {
      sql_errno=ER_UNKNOWN_ERROR;
      err=ER(sql_errno);       
    }
4945
    rli->report(ERROR_LEVEL, sql_errno,"\
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4946
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
4947
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4949 4950
    return 1;
  }
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4951
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4952

4953
  if (thd->is_fatal_error)
4954
  {
4955 4956 4957 4958 4959 4960 4961 4962 4963
    char buf[256];
    my_snprintf(buf, sizeof(buf),
                "Running LOAD DATA INFILE on table '%-.64s'."
                " Default database: '%-.64s'",
                (char*)table_name,
                print_slave_db_safe(remember_db));

    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), buf);
4964 4965 4966
    return 1;
  }

4967
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
4968
}
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#endif
4970 4971


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/**************************************************************************
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  Rotate_log_event methods
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**************************************************************************/
4975

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/*
4977
  Rotate_log_event::pack_info()
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*/
4979

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4980
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4981
void Rotate_log_event::pack_info(Protocol *protocol)
4982
{
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  char buf1[256], buf[22];
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  String tmp(buf1, sizeof(buf1), log_cs);
4985
  tmp.length(0);
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  tmp.append(new_log_ident, ident_len);
4987
  tmp.append(STRING_WITH_LEN(";pos="));
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  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
4990
}
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#endif
4992

4993

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/*
4995
  Rotate_log_event::print()
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*/
4997 4998

#ifdef MYSQL_CLIENT
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void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5000
{
5001
  char buf[22];
5002 5003
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
5004

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  if (print_event_info->short_form)
5006
    return;
5007 5008
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
5009
  if (new_log_ident)
5010
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
5011
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
5012
}
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#endif /* MYSQL_CLIENT */
5014 5015


5016

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/*
5018
  Rotate_log_event::Rotate_log_event() (2 constructors)
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*/
5020

5021 5022

#ifndef MYSQL_CLIENT
5023
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
5024 5025 5026 5027 5028 5029 5030 5031
                                   uint ident_len_arg, ulonglong pos_arg,
                                   uint flags_arg)
  :Log_event(), new_log_ident(new_log_ident_arg),
   pos(pos_arg),ident_len(ident_len_arg ? ident_len_arg :
                          (uint) strlen(new_log_ident_arg)), flags(flags_arg)
{
#ifndef DBUG_OFF
  char buff[22];
5032
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
5035 5036
#endif
  if (flags & DUP_NAME)
5037
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
5038 5039
  if (flags & RELAY_LOG)
    set_relay_log_event();
5040 5041 5042 5043 5044
  DBUG_VOID_RETURN;
}
#endif


5045 5046
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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5047
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
5048
{
5049
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
5050
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
5051 5052
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
5053 5054
  uint ident_offset;
  if (event_len < header_size)
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5055
    DBUG_VOID_RETURN;
5056
  buf += header_size;
5057 5058 5059 5060
  pos = post_header_len ? uint8korr(buf + R_POS_OFFSET) : 4;
  ident_len = (uint)(event_len -
                     (header_size+post_header_len)); 
  ident_offset = post_header_len; 
5061
  set_if_smaller(ident_len,FN_REFLEN-1);
5062
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
5063
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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  DBUG_VOID_RETURN;
5065
}
5066 5067


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/*
5069
  Rotate_log_event::write()
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*/
5071

5072
#ifndef MYSQL_CLIENT
5073
bool Rotate_log_event::write(IO_CACHE* file)
5074
{
5075
  char buf[ROTATE_HEADER_LEN];
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  int8store(buf + R_POS_OFFSET, pos);
5077
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
5078 5079
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
5080
}
5081
#endif
5082

5083

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5084
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5085

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5086 5087
/*
  Got a rotate log event from the master.
5088

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  This is mainly used so that we can later figure out the logname and
  position for the master.
5091

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5092 5093 5094
  We can't rotate the slave's BINlog as this will cause infinitive rotations
  in a A -> B -> A setup.
  The NOTES below is a wrong comment which will disappear when 4.1 is merged.
5095

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  @retval
5097
    0	ok
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5098
*/
5099
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
5100
{
5101
  DBUG_ENTER("Rotate_log_event::do_update_pos");
5102 5103 5104 5105
#ifndef DBUG_OFF
  char buf[32];
#endif

5106 5107
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
5108 5109
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
5110

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5111
  /*
5112 5113 5114 5115
    If we are in a transaction or in a group: the only normal case is
    when the I/O thread was copying a big transaction, then it was
    stopped and restarted: we have this in the relay log:

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    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
5121 5122 5123 5124

    In that case, we don't want to touch the coordinates which
    correspond to the beginning of the transaction.  Starting from
    5.0.0, there also are some rotates from the slave itself, in the
5125
    relay log, which shall not change the group positions.
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  */
5127
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
5128
      !is_relay_log_event() &&
5129
      !rli->is_in_group())
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  {
5131
    pthread_mutex_lock(&rli->data_lock);
5132 5133 5134 5135
    DBUG_PRINT("info", ("old group_master_log_name: '%s'  "
                        "old group_master_log_pos: %lu",
                        rli->group_master_log_name,
                        (ulong) rli->group_master_log_pos));
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    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
5138
    rli->inc_group_relay_log_pos(pos, TRUE /* skip_lock */);
5139 5140
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
5141
                        rli->group_master_log_name,
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                        (ulong) rli->group_master_log_pos));
5143 5144 5145
    pthread_mutex_unlock(&rli->data_lock);
    flush_relay_log_info(rli);
    
5146
    /*
5147 5148
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
5149 5150 5151 5152 5153
      However, no need to reset description_event_for_exec: indeed, if the next
      master is 5.0 (even 5.0.1) we will soon get a Format_desc; if the next
      master is 4.0 then the events are in the slave's format (conversion).
    */
    set_slave_thread_options(thd);
5154
    set_slave_thread_default_charset(thd, rli);
5155
    thd->variables.sql_mode= global_system_variables.sql_mode;
5156 5157
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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5158
  }
5159 5160 5161
  else
    rli->inc_event_relay_log_pos();

5162

5163
  DBUG_RETURN(0);
5164
}
5165

5166 5167

Log_event::enum_skip_reason
5168
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
5169
{
5170
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
5171 5172

  switch (reason) {
5173
  case Log_event::EVENT_SKIP_NOT:
5174
  case Log_event::EVENT_SKIP_COUNT:
5175
    return Log_event::EVENT_SKIP_NOT;
5176

5177 5178
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
5179 5180
  }
  DBUG_ASSERT(0);
5181
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
5182 5183
}

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5184
#endif
5185 5186


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5187
/**************************************************************************
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5188
	Intvar_log_event methods
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5189
**************************************************************************/
5190

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5191
/*
5192
  Intvar_log_event::pack_info()
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5193
*/
5194

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5195
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5196
void Intvar_log_event::pack_info(Protocol *protocol)
5197
{
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5198 5199
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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  *pos++= '=';
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  pos= longlong10_to_str(val, pos, -10);
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5202
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
5203
}
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5204
#endif
5205

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5206

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5207
/*
5208
  Intvar_log_event::Intvar_log_event()
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*/
5210

5211 5212 5213
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
5214
{
5215 5216 5217
  /* The Post-Header is empty. The Varible Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[INTVAR_EVENT-1];
5218 5219
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
5220 5221
}

5222

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5223
/*
5224
  Intvar_log_event::get_var_type_name()
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5225
*/
5226 5227

const char* Intvar_log_event::get_var_type_name()
5228
{
5229 5230 5231 5232 5233
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
5234 5235
}

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5236

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5237
/*
5238
  Intvar_log_event::write()
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5239
*/
5240

5241
#ifndef MYSQL_CLIENT
5242
bool Intvar_log_event::write(IO_CACHE* file)
5243
{
5244 5245
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
5246
  int8store(buf + I_VAL_OFFSET, val);
5247 5248
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
5249
}
5250
#endif
5251

5252

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5253
/*
5254
  Intvar_log_event::print()
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5255
*/
5256 5257

#ifdef MYSQL_CLIENT
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5258
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5259
{
5260 5261 5262
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
5263 5264
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
5265

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5266
  if (!print_event_info->short_form)
5267
  {
5268 5269
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
5270
  }
5271

5272
  my_b_printf(&cache, "SET ");
5273 5274 5275 5276 5277 5278 5279
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
5280 5281 5282 5283
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
5284
  }
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5285 5286
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
5287
}
5288
#endif
5289

5290

5291 5292
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)

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5293
/*
5294
  Intvar_log_event::do_apply_event()
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5295
*/
5296

5297
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
5298
{
5299 5300 5301 5302
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5303
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5304

5305 5306 5307
  if (rli->deferred_events_collecting)
    return rli->deferred_events->add(this);

5308 5309
  switch (type) {
  case LAST_INSERT_ID_EVENT:
5310 5311
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
5312 5313
    break;
  case INSERT_ID_EVENT:
5314
    thd->force_one_auto_inc_interval(val);
5315 5316
    break;
  }
5317 5318 5319
  return 0;
}

5320
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
5321
{
5322
  rli->inc_event_relay_log_pos();
5323
  return 0;
5324
}
5325 5326 5327


Log_event::enum_skip_reason
5328
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
5329 5330
{
  /*
5331 5332 5333 5334 5335 5336
    It is a common error to set the slave skip counter to 1 instead of
    2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
5337
  */
5338
  return continue_group(rli);
5339 5340
}

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5341
#endif
5342

5343

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5344
/**************************************************************************
5345
  Rand_log_event methods
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5346
**************************************************************************/
5347

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5348
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5349
void Rand_log_event::pack_info(Protocol *protocol)
5350
{
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5351 5352 5353 5354 5355
  char buf1[256], *pos;
  pos= strmov(buf1,"rand_seed1=");
  pos= int10_to_str((long) seed1, pos, 10);
  pos= strmov(pos, ",rand_seed2=");
  pos= int10_to_str((long) seed2, pos, 10);
5356
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
5357
}
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5358
#endif
5359 5360


5361 5362 5363
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
5364
{
5365 5366 5367
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[RAND_EVENT-1];
5368 5369
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
5370 5371
}

5372

5373
#ifndef MYSQL_CLIENT
5374
bool Rand_log_event::write(IO_CACHE* file)
5375
{
5376
  uchar buf[16];
5377 5378
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
5379 5380
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
5381
}
5382
#endif
5383

5384 5385

#ifdef MYSQL_CLIENT
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5386
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5387
{
5388 5389 5390
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5391
  char llbuff[22],llbuff2[22];
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5392
  if (!print_event_info->short_form)
5393
  {
5394 5395
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
5396
  }
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5397 5398 5399
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
5400
}
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5401
#endif /* MYSQL_CLIENT */
5402

5403

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5404
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5405
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
5406
{
5407 5408 5409 5410
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5411
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5412

5413 5414 5415
  if (rli->deferred_events_collecting)
    return rli->deferred_events->add(this);

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5416 5417
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
5418 5419 5420
  return 0;
}

5421
int Rand_log_event::do_update_pos(Relay_log_info *rli)
5422
{
5423
  rli->inc_event_relay_log_pos();
5424 5425
  return 0;
}
5426

5427 5428

Log_event::enum_skip_reason
5429
Rand_log_event::do_shall_skip(Relay_log_info *rli)
5430 5431
{
  /*
5432 5433 5434 5435 5436 5437
    It is a common error to set the slave skip counter to 1 instead of
    2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
5438
  */
5439
  return continue_group(rli);
5440 5441
}

5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464
/**
   Exec deferred Int-, Rand- and User- var events prefixing
   a Query-log-event event.

   @param thd THD handle

   @return false on success, true if a failure in an event applying occurred.
*/
bool slave_execute_deferred_events(THD *thd)
{
  bool res= false;
  Relay_log_info *rli= thd->rli_slave;

  DBUG_ASSERT(rli && (!rli->deferred_events_collecting || rli->deferred_events));

  if (!rli->deferred_events_collecting || rli->deferred_events->is_empty())
    return res;

  res= rli->deferred_events->execute(rli);

  return res;
}

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5465
#endif /* !MYSQL_CLIENT */
5466

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5467

5468 5469 5470 5471 5472 5473 5474
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
5475 5476
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
5477
  pos= longlong10_to_str(xid, pos, 10);
5478
  pos= strmov(pos, " */");
5479 5480 5481 5482
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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5483 5484 5485
/**
  @note
  It's ok not to use int8store here,
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5486
  as long as xid_t::set(ulonglong) and
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5487 5488
  xid_t::get_my_xid doesn't do it either.
  We don't care about actual values of xids as long as
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5489 5490
  identical numbers compare identically
*/
5491 5492 5493 5494

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
5495 5496
  :Log_event(buf, description_event)
{
5497 5498 5499
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[XID_EVENT-1];
5500
  memcpy((char*) &xid, buf, sizeof(xid));
5501 5502 5503
}


5504
#ifndef MYSQL_CLIENT
5505 5506
bool Xid_log_event::write(IO_CACHE* file)
{
5507
  DBUG_EXECUTE_IF("do_not_write_xid", return 0;);
5508
  return write_header(file, sizeof(xid)) ||
5509
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
5510
}
5511
#endif
5512 5513 5514


#ifdef MYSQL_CLIENT
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5515
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5516
{
5517 5518 5519
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5520
  if (!print_event_info->short_form)
5521
  {
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5522 5523 5524
    char buf[64];
    longlong10_to_str(xid, buf, 10);

5525 5526
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
5527
  }
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5528
  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
5529 5530 5531 5532 5533
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5534
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
5535
{
5536
  /* For a slave Xid_log_event is COMMIT */
5537 5538
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
5539
  return end_trans(thd, COMMIT);
5540
}
5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551

Log_event::enum_skip_reason
Xid_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Xid_log_event::do_shall_skip");
  if (rli->slave_skip_counter > 0) {
    thd->options&= ~OPTION_BEGIN;
    DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
  }
  DBUG_RETURN(Log_event::do_shall_skip(rli));
}
5552 5553 5554
#endif /* !MYSQL_CLIENT */


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5555
/**************************************************************************
5556
  User_var_log_event methods
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5557
**************************************************************************/
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5558

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5559
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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5560 5561 5562
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
5563
  uint val_offset= 4 + name_len;
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5564 5565 5566 5567
  uint event_len= val_offset;

  if (is_null)
  {
5568 5569
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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5570 5571 5572 5573 5574 5575 5576 5577 5578
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
5579 5580 5581
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
5582
      event_len+= sprintf(buf + val_offset, "%.14g", real_val);
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5583 5584
      break;
    case INT_RESULT:
5585 5586
      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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5587 5588
      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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5589 5590
    case DECIMAL_RESULT:
    {
5591 5592 5593
      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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5594 5595
      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
5596 5597
      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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5598 5599 5600 5601
      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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5602
    case STRING_RESULT:
5603
      /* 15 is for 'COLLATE' and other chars */
5604 5605
      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
5606
      CHARSET_INFO *cs;
5607 5608
      if (!buf)
        return;
5609 5610 5611 5612 5613 5614 5615
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
5616 5617 5618
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
5619 5620
        event_len= p-buf;
      }
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5621
      break;
5622
    case ROW_RESULT:
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5623
    default:
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5624 5625 5626 5627 5628
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
5629
  buf[1]= '`';
5630
  memcpy(buf+2, name, name_len);
5631 5632
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
5633
  protocol->store(buf, event_len, &my_charset_bin);
5634
  my_free(buf, MYF(0));
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5635
}
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5636
#endif /* !MYSQL_CLIENT */
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5637 5638


5639 5640 5641 5642
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
Andrei Elkin's avatar
Andrei Elkin committed
5643 5644 5645
#ifndef MYSQL_CLIENT
  , deferred(false)
#endif
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5646
{
5647 5648 5649
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[USER_VAR_EVENT-1];
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5650 5651
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
5652 5653
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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5654 5655 5656
  if (is_null)
  {
    type= STRING_RESULT;
5657
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
5663 5664 5665
    type= (Item_result) buf[UV_VAL_IS_NULL];
    charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
    val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
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5666
		       UV_CHARSET_NUMBER_SIZE);
5667 5668
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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5669 5670 5671 5672
  }
}


5673
#ifndef MYSQL_CLIENT
5674
bool User_var_log_event::write(IO_CACHE* file)
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5675 5676 5677 5678
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
5679
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
5680
  uint buf1_length;
5681
  ulong event_length;
5682

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5683
  int4store(buf, name_len);
5684 5685 5686 5687
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
5688
    val_len= 0;                                 // Length of 'pos'
5689 5690
  }    
  else
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  {
    buf1[1]= type;
    int4store(buf1 + 2, charset_number);

    switch (type) {
    case REAL_RESULT:
      float8store(buf2, *(double*) val);
      break;
    case INT_RESULT:
      int8store(buf2, *(longlong*) val);
      break;
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5702 5703 5704 5705 5706 5707
    case DECIMAL_RESULT:
    {
      my_decimal *dec= (my_decimal *)val;
      dec->fix_buffer_pointer();
      buf2[0]= (char)(dec->intg + dec->frac);
      buf2[1]= (char)dec->frac;
5708
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
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      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
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5712
    case STRING_RESULT:
5713
      pos= (uchar*) val;
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      break;
5715
    case ROW_RESULT:
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5716
    default:
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      DBUG_ASSERT(1);
      return 0;
    }
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    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
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  }
5723 5724 5725 5726 5727

  /* Length of the whole event */
  event_length= sizeof(buf)+ name_len + buf1_length + val_len;

  return (write_header(file, event_length) ||
5728 5729 5730 5731
          my_b_safe_write(file, (uchar*) buf, sizeof(buf))   ||
	  my_b_safe_write(file, (uchar*) name, name_len)     ||
	  my_b_safe_write(file, (uchar*) buf1, buf1_length) ||
	  my_b_safe_write(file, pos, val_len));
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}
5733
#endif
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5735

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/*
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  User_var_log_event::print()
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*/
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#ifdef MYSQL_CLIENT
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5741
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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5742
{
5743 5744 5745
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5746
  if (!print_event_info->short_form)
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5747
  {
5748 5749
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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5750 5751
  }

5752
  my_b_printf(&cache, "SET @`");
5753
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
5754
  my_b_printf(&cache, "`");
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  if (is_null)
  {
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5758
    my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
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5759 5760 5761 5762 5763 5764
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
5765
      char real_buf[FMT_G_BUFSIZE(14)];
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      float8get(real_val, val);
5767
      sprintf(real_buf, "%.14g", real_val);
5768
      my_b_printf(&cache, ":=%s%s\n", real_buf, print_event_info->delimiter);
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5769 5770 5771 5772
      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
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5773
      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
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5774
      break;
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5775 5776 5777 5778 5779 5780
    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
5781 5782
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

5786
      bin2decimal((uchar*) val+2, &dec, precision, scale);
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      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
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      my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
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      break;
    }
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5792
    case STRING_RESULT:
5793
    {
5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807
      /*
        Let's express the string in hex. That's the most robust way. If we
        print it in character form instead, we need to escape it with
        character_set_client which we don't know (we will know it in 5.0, but
        in 4.1 we don't know it easily when we are printing
        User_var_log_event). Explanation why we would need to bother with
        character_set_client (quoting Bar):
        > Note, the parser doesn't switch to another unescaping mode after
        > it has met a character set introducer.
        > For example, if an SJIS client says something like:
        > SET @a= _ucs2 \0a\0b'
        > the string constant is still unescaped according to SJIS, not
        > according to UCS2.
      */
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      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
5812
        break; // no error, as we are 'void'
5813
      str_to_hex(hex_str, val, val_len);
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      /*
        For proper behaviour when mysqlbinlog|mysql, we need to explicitely
        specify the variable's collation. It will however cause problems when
        people want to mysqlbinlog|mysql into another server not supporting the
        character set. But there's not much to do about this and it's unlikely.
      */
      if (!(cs= get_charset(charset_number, MYF(0))))
        /*
          Generate an unusable command (=> syntax error) is probably the best
          thing we can do here.
        */
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        my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter);
5826
      else
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        my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n",
                    cs->csname, hex_str, cs->name,
                    print_event_info->delimiter);
5830
      my_afree(hex_str);
5831
    }
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      break;
5833
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
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      return;
    }
  }
}
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#endif
5841

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5842

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5843
/*
5844
  User_var_log_event::do_apply_event()
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5845
*/
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5846

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5847
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5848
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
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5849 5850
{
  Item *it= 0;
5851
  CHARSET_INFO *charset;
5852 5853

  if (rli->deferred_events_collecting)
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5854 5855
  {
    set_deferred();
5856
    return rli->deferred_events->add(this);
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5857
  }
5858

5859 5860
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
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  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
5864 5865
  double real_val;
  longlong int_val;
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5867 5868 5869 5870
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5871
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5872

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
5882
      it= new Item_float(real_val, 0);
5883
      val= (char*) &real_val;		// Pointer to value in native format
5884
      val_len= 8;
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      break;
    case INT_RESULT:
5887 5888 5889
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
5890
      val_len= 8;
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5891
      break;
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    case DECIMAL_RESULT:
    {
5894
      Item_decimal *dec= new Item_decimal((uchar*) val+2, val[0], val[1]);
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      it= dec;
      val= (char *)dec->val_decimal(NULL);
      val_len= sizeof(my_decimal);
      break;
    }
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5900 5901 5902
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
5903
    case ROW_RESULT:
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5904
    default:
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5905 5906 5907 5908
      DBUG_ASSERT(1);
      return 0;
    }
  }
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5909 5910

  Item_func_set_user_var *e= new Item_func_set_user_var(user_var_name, it);
5911 5912 5913
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
5914 5915 5916 5917

    Fix_fields() can fail, in which case a call of update_hash() might
    crash the server, so if fix fields fails, we just return with an
    error.
5918
  */
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5919
  if (e->fix_fields(thd, 0))
5920 5921
    return 1;

5922 5923 5924 5925 5926
  /*
    A variable can just be considered as a table with
    a single record and with a single column. Thus, like
    a column value, it could always have IMPLICIT derivation.
   */
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Andrei Elkin committed
5927 5928 5929
  e->update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
  if (!is_deferred())
    free_root(thd->mem_root,0);
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5931 5932 5933
  return 0;
}

5934
int User_var_log_event::do_update_pos(Relay_log_info *rli)
5935
{
5936
  rli->inc_event_relay_log_pos();
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5937 5938
  return 0;
}
5939

5940
Log_event::enum_skip_reason
5941
User_var_log_event::do_shall_skip(Relay_log_info *rli)
5942 5943 5944 5945 5946 5947 5948 5949 5950
{
  /*
    It is a common error to set the slave skip counter to 1 instead
    of 2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
  */
5951
  return continue_group(rli);
5952
}
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5953
#endif /* !MYSQL_CLIENT */
5954 5955


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5956
/**************************************************************************
5957
  Slave_log_event methods
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5958
**************************************************************************/
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5959

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5960
#ifdef HAVE_REPLICATION
5961
#ifdef MYSQL_CLIENT
5962
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
5963
{
5964 5965
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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5966
  if (print_event_info->short_form)
5967
    return;
5968 5969
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
5970 5971
}
#endif  
5972

5973
#ifndef MYSQL_CLIENT
5974
void Slave_log_event::pack_info(Protocol *protocol)
5975
{
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5976
  char buf[256+HOSTNAME_LENGTH], *pos;
5977 5978 5979 5980 5981 5982 5983
  pos= strmov(buf, "host=");
  pos= strnmov(pos, master_host, HOSTNAME_LENGTH);
  pos= strmov(pos, ",port=");
  pos= int10_to_str((long) master_port, pos, 10);
  pos= strmov(pos, ",log=");
  pos= strmov(pos, master_log);
  pos= strmov(pos, ",pos=");
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  pos= longlong10_to_str(master_pos, pos, 10);
5985
  protocol->store(buf, pos-buf, &my_charset_bin);
5986
}
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5987
#endif /* !MYSQL_CLIENT */
5988 5989 5990


#ifndef MYSQL_CLIENT
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/**
  @todo
  re-write this better without holding both locks at the same time
*/
5995
Slave_log_event::Slave_log_event(THD* thd_arg,
5996
				 Relay_log_info* rli)
5997
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
5998 5999 6000 6001
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
6002

6003
  Master_info* mi = rli->mi;
6004 6005 6006 6007
  // TODO: re-write this better without holding both locks at the same time
  pthread_mutex_lock(&mi->data_lock);
  pthread_mutex_lock(&rli->data_lock);
  master_host_len = strlen(mi->host);
6008
  master_log_len = strlen(rli->group_master_log_name);
6009 6010 6011
  // on OOM, just do not initialize the structure and print the error
  if ((mem_pool = (char*)my_malloc(get_data_size() + 1,
				   MYF(MY_WME))))
6012
  {
6013 6014 6015
    master_host = mem_pool + SL_MASTER_HOST_OFFSET ;
    memcpy(master_host, mi->host, master_host_len + 1);
    master_log = master_host + master_host_len + 1;
6016
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
6017
    master_port = mi->port;
6018
    master_pos = rli->group_master_log_pos;
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6019
    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
6020
			(ulong) master_pos));
6021
  }
6022 6023 6024 6025 6026 6027
  else
    sql_print_error("Out of memory while recording slave event");
  pthread_mutex_unlock(&rli->data_lock);
  pthread_mutex_unlock(&mi->data_lock);
  DBUG_VOID_RETURN;
}
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6028
#endif /* !MYSQL_CLIENT */
6029 6030 6031 6032 6033 6034 6035 6036 6037


Slave_log_event::~Slave_log_event()
{
  my_free(mem_pool, MYF(MY_ALLOW_ZERO_PTR));
}


#ifdef MYSQL_CLIENT
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6038
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
6039
{
6040 6041
  Write_on_release_cache cache(&print_event_info->head_cache, file);

6042
  char llbuff[22];
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6043
  if (print_event_info->short_form)
6044
    return;
6045 6046
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
6048 6049
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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6050
#endif /* MYSQL_CLIENT */
6051 6052 6053 6054 6055 6056 6057 6058


int Slave_log_event::get_data_size()
{
  return master_host_len + master_log_len + 1 + SL_MASTER_HOST_OFFSET;
}


6059
#ifndef MYSQL_CLIENT
6060
bool Slave_log_event::write(IO_CACHE* file)
6061
{
6062
  ulong event_length= get_data_size();
6063 6064 6065
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
6066 6067

  return (write_header(file, event_length) ||
6068
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
6069
}
6070
#endif
6071 6072 6073 6074 6075 6076 6077


void Slave_log_event::init_from_mem_pool(int data_size)
{
  master_pos = uint8korr(mem_pool + SL_MASTER_POS_OFFSET);
  master_port = uint2korr(mem_pool + SL_MASTER_PORT_OFFSET);
  master_host = mem_pool + SL_MASTER_HOST_OFFSET;
6078
  master_host_len = (uint) strlen(master_host);
6079 6080 6081
  // safety
  master_log = master_host + master_host_len + 1;
  if (master_log > mem_pool + data_size)
6082
  {
6083 6084
    master_host = 0;
    return;
6085
  }
6086
  master_log_len = (uint) strlen(master_log);
6087
}
6088

6089

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6090
/** This code is not used, so has not been updated to be format-tolerant. */
6091 6092 6093 6094 6095 6096
/* We are using description_event so that slave does not crash on Log_event
  constructor */
Slave_log_event::Slave_log_event(const char* buf, 
                                 uint event_len,
                                 const Format_description_log_event* description_event)
  :Log_event(buf,description_event),mem_pool(0),master_host(0)
6097
{
6098
  if (event_len < LOG_EVENT_HEADER_LEN)
6099
    return;
6100
  event_len -= LOG_EVENT_HEADER_LEN;
6101 6102 6103 6104 6105
  if (!(mem_pool = (char*) my_malloc(event_len + 1, MYF(MY_WME))))
    return;
  memcpy(mem_pool, buf + LOG_EVENT_HEADER_LEN, event_len);
  mem_pool[event_len] = 0;
  init_from_mem_pool(event_len);
6106 6107
}

6108

6109
#ifndef MYSQL_CLIENT
6110
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
6111 6112
{
  if (mysql_bin_log.is_open())
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6113
    return mysql_bin_log.write(this);
6114
  return 0;
6115
}
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6116
#endif /* !MYSQL_CLIENT */
6117 6118


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6119
/**************************************************************************
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6120
	Stop_log_event methods
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6121
**************************************************************************/
6122

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6123
/*
6124
  Stop_log_event::print()
6125
*/
6126 6127

#ifdef MYSQL_CLIENT
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6128
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
6129
{
6130 6131 6132
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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6133
  if (print_event_info->short_form)
6134 6135
    return;

6136 6137
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
6138
}
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6139
#endif /* MYSQL_CLIENT */
6140

6141

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6142
#ifndef MYSQL_CLIENT
6143
/*
6144 6145 6146 6147 6148 6149 6150
  The master stopped.  We used to clean up all temporary tables but
  this is useless as, as the master has shut down properly, it has
  written all DROP TEMPORARY TABLE (prepared statements' deletion is
  TODO only when we binlog prep stmts).  We used to clean up
  slave_load_tmpdir, but this is useless as it has been cleared at the
  end of LOAD DATA INFILE.  So we have nothing to do here.  The place
  were we must do this cleaning is in
6151
  Start_log_event_v3::do_apply_event(), not here. Because if we come
6152
  here, the master was sane.
6153
*/
6154
int Stop_log_event::do_update_pos(Relay_log_info *rli)
6155
{
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6156 6157
  /*
    We do not want to update master_log pos because we get a rotate event
6158
    before stop, so by now group_master_log_name is set to the next log.
6159
    If we updated it, we will have incorrect master coordinates and this
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6160
    could give false triggers in MASTER_POS_WAIT() that we have reached
6161
    the target position when in fact we have not.
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6162
  */
6163 6164 6165 6166 6167 6168 6169
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
6170 6171
  return 0;
}
6172

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6173
#endif /* !MYSQL_CLIENT */
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6174
#endif /* HAVE_REPLICATION */
6175

6176

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6177
/**************************************************************************
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6178
	Create_file_log_event methods
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6179
**************************************************************************/
6180 6181

/*
6182
  Create_file_log_event ctor
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6183
*/
6184 6185

#ifndef MYSQL_CLIENT
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Create_file_log_event::
Create_file_log_event(THD* thd_arg, sql_exchange* ex,
		      const char* db_arg, const char* table_name_arg,
		      List<Item>& fields_arg, enum enum_duplicates handle_dup,
6190
                      bool ignore,
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		      uchar* block_arg, uint block_len_arg, bool using_trans)
6192
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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6193
		  using_trans),
6194
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
6195
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
6196
{
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6197
  DBUG_ENTER("Create_file_log_event");
6198
  sql_ex.force_new_format();
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6199
  DBUG_VOID_RETURN;
6200
}
6201

6202

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6203
/*
6204
  Create_file_log_event::write_data_body()
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6205
*/
6206

6207
bool Create_file_log_event::write_data_body(IO_CACHE* file)
6208
{
6209 6210
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
6211
    return res;
6212 6213
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
6214 6215
}

6216

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6217
/*
6218
  Create_file_log_event::write_data_header()
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6219
*/
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6220

6221
bool Create_file_log_event::write_data_header(IO_CACHE* file)
6222
{
6223
  bool res;
6224
  uchar buf[CREATE_FILE_HEADER_LEN];
6225 6226
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
6227
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
6228
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
6229 6230 6231
}


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6232
/*
6233
  Create_file_log_event::write_base()
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6234
*/
6235

6236
bool Create_file_log_event::write_base(IO_CACHE* file)
6237
{
6238 6239 6240 6241
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
6242 6243 6244
  return res;
}

6245
#endif /* !MYSQL_CLIENT */
6246

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6247
/*
6248
  Create_file_log_event ctor
unknown's avatar
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6249
*/
6250

6251 6252 6253
Create_file_log_event::Create_file_log_event(const char* buf, uint len,
                                             const Format_description_log_event* description_event)
  :Load_log_event(buf,0,description_event),fake_base(0),block(0),inited_from_old(0)
6254
{
6255 6256 6257 6258 6259
  DBUG_ENTER("Create_file_log_event::Create_file_log_event(char*,...)");
  uint block_offset;
  uint header_len= description_event->common_header_len;
  uint8 load_header_len= description_event->post_header_len[LOAD_EVENT-1];
  uint8 create_file_header_len= description_event->post_header_len[CREATE_FILE_EVENT-1];
6260
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
6261 6262 6263 6264 6265 6266 6267
      copy_log_event(event_buf,len,
                     ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                      load_header_len + header_len :
                      (fake_base ? (header_len+load_header_len) :
                       (header_len+load_header_len) +
                       create_file_header_len)),
                     description_event))
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6268
    DBUG_VOID_RETURN;
6269
  if (description_event->binlog_version!=1)
6270
  {
6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287
    file_id= uint4korr(buf + 
                       header_len +
		       load_header_len + CF_FILE_ID_OFFSET);
    /*
      Note that it's ok to use get_data_size() below, because it is computed
      with values we have already read from this event (because we called
      copy_log_event()); we are not using slave's format info to decode
      master's format, we are really using master's format info.
      Anyway, both formats should be identical (except the common_header_len)
      as these Load events are not changed between 4.0 and 5.0 (as logging of
      LOAD DATA INFILE does not use Load_log_event in 5.0).

      The + 1 is for \0 terminating fname  
    */
    block_offset= (description_event->common_header_len +
                   Load_log_event::get_data_size() +
                   create_file_header_len + 1);
6288
    if (len < block_offset)
6289
      DBUG_VOID_RETURN;
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6290
    block = (uchar*)buf + block_offset;
6291 6292 6293 6294 6295 6296
    block_len = len - block_offset;
  }
  else
  {
    sql_ex.force_new_format();
    inited_from_old = 1;
6297
  }
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6298
  DBUG_VOID_RETURN;
6299 6300
}

6301

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6302
/*
6303
  Create_file_log_event::print()
unknown's avatar
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6304
*/
6305 6306

#ifdef MYSQL_CLIENT
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6307
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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6308
				  bool enable_local)
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6309
{
6310 6311
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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6312
  if (print_event_info->short_form)
6313 6314
  {
    if (enable_local && check_fname_outside_temp_buf())
unknown's avatar
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6315
      Load_log_event::print(file, print_event_info);
6316
    return;
6317 6318 6319 6320
  }

  if (enable_local)
  {
unknown's avatar
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6321
    Load_log_event::print(file, print_event_info,
6322
			  !check_fname_outside_temp_buf());
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6323 6324 6325 6326
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
6327
    my_b_printf(&cache, "#"); 
6328 6329
  }

6330
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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6331
}
6332

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6333

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6334
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
6335
{
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6336
  print(file, print_event_info, 0);
6337
}
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6338
#endif /* MYSQL_CLIENT */
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6339

6340

unknown's avatar
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6341
/*
6342
  Create_file_log_event::pack_info()
unknown's avatar
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6343
*/
6344

unknown's avatar
SCRUM  
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6345
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6346
void Create_file_log_event::pack_info(Protocol *protocol)
6347
{
6348 6349 6350
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
unknown's avatar
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6351
  pos= strmov(pos + db_len, ";table=");
6352
  memcpy(pos, table_name, table_name_len);
unknown's avatar
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6353
  pos= strmov(pos + table_name_len, ";file_id=");
6354 6355 6356
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
unknown's avatar
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6357
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
6358
}
unknown's avatar
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6359
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6360 6361


6362
/**
6363
  Create_file_log_event::do_apply_event()
6364 6365 6366 6367 6368 6369 6370
  Constructor for Create_file_log_event to intantiate an event
  from the relay log on the slave.

  @retval
    0           Success
  @retval
    1           Failure
unknown's avatar
unknown committed
6371
*/
6372

unknown's avatar
SCRUM  
unknown committed
6373
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6374
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
6375
{
unknown's avatar
unknown committed
6376 6377
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
6378 6379 6380
  int fd = -1;
  IO_CACHE file;
  int error = 1;
unknown's avatar
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6381

6382
  bzero((char*)&file, sizeof(file));
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6383 6384
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
6385
  thd_proc_info(thd, proc_info);
6386 6387 6388 6389
  my_delete(fname_buf, MYF(0)); // old copy may exist already
  if ((fd= my_create(fname_buf, CREATE_MODE,
		     O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
		     MYF(MY_WME))) < 0 ||
6390 6391 6392
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6393 6394 6395
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6396 6397 6398 6399
    goto err;
  }
  
  // a trick to avoid allocating another buffer
unknown's avatar
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6400 6401
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
6402 6403
  if (write_base(&file))
  {
unknown's avatar
unknown committed
6404
    strmov(ext, ".info"); // to have it right in the error message
6405 6406 6407
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
6408 6409 6410 6411 6412 6413
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
6414 6415 6416 6417
  my_delete(fname_buf, MYF(0)); // old copy may exist already
  if ((fd= my_create(fname_buf, CREATE_MODE,
		     O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
		     MYF(MY_WME))) < 0)
6418
  {
6419 6420 6421
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6422 6423
    goto err;
  }
6424
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6425
  {
6426 6427 6428
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
6429 6430
    goto err;
  }
6431 6432
  error=0;					// Everything is ok

6433 6434 6435 6436 6437
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
6438
  thd_proc_info(thd, 0);
6439
  return error != 0;
6440
}
unknown's avatar
unknown committed
6441
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6442

6443

unknown's avatar
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6444
/**************************************************************************
unknown's avatar
unknown committed
6445
	Append_block_log_event methods
unknown's avatar
unknown committed
6446
**************************************************************************/
6447

unknown's avatar
unknown committed
6448
/*
6449
  Append_block_log_event ctor
unknown's avatar
unknown committed
6450
*/
6451 6452

#ifndef MYSQL_CLIENT  
6453 6454
Append_block_log_event::Append_block_log_event(THD *thd_arg,
                                               const char *db_arg,
unknown's avatar
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6455
					       uchar *block_arg,
unknown's avatar
unknown committed
6456 6457 6458
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
unknown's avatar
unknown committed
6459
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
6460 6461
{
}
unknown's avatar
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6462
#endif
6463 6464


unknown's avatar
unknown committed
6465
/*
6466
  Append_block_log_event ctor
unknown's avatar
unknown committed
6467
*/
6468

6469 6470 6471
Append_block_log_event::Append_block_log_event(const char* buf, uint len,
                                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event),block(0)
6472
{
6473 6474 6475 6476 6477 6478
  DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
  uint8 common_header_len= description_event->common_header_len; 
  uint8 append_block_header_len=
    description_event->post_header_len[APPEND_BLOCK_EVENT-1];
  uint total_header_len= common_header_len+append_block_header_len;
  if (len < total_header_len)
unknown's avatar
unknown committed
6479
    DBUG_VOID_RETURN;
6480
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
unknown's avatar
unknown committed
6481
  block= (uchar*)buf + total_header_len;
6482
  block_len= len - total_header_len;
unknown's avatar
unknown committed
6483
  DBUG_VOID_RETURN;
6484 6485 6486
}


unknown's avatar
unknown committed
6487
/*
6488
  Append_block_log_event::write()
unknown's avatar
unknown committed
6489
*/
6490

6491
#ifndef MYSQL_CLIENT
6492
bool Append_block_log_event::write(IO_CACHE* file)
6493
{
6494
  uchar buf[APPEND_BLOCK_HEADER_LEN];
6495
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
6496 6497
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
6498
	  my_b_safe_write(file, (uchar*) block, block_len));
6499
}
6500
#endif
6501 6502


unknown's avatar
unknown committed
6503
/*
6504
  Append_block_log_event::print()
unknown's avatar
unknown committed
6505
*/
6506 6507

#ifdef MYSQL_CLIENT  
unknown's avatar
unknown committed
6508
void Append_block_log_event::print(FILE* file,
unknown's avatar
unknown committed
6509
				   PRINT_EVENT_INFO* print_event_info)
6510
{
6511 6512
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
6513
  if (print_event_info->short_form)
6514
    return;
6515 6516 6517
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#%s: file_id: %d  block_len: %d\n",
              get_type_str(), file_id, block_len);
6518
}
unknown's avatar
unknown committed
6519
#endif /* MYSQL_CLIENT */
6520 6521


unknown's avatar
unknown committed
6522
/*
6523
  Append_block_log_event::pack_info()
unknown's avatar
unknown committed
6524
*/
6525

unknown's avatar
SCRUM  
unknown committed
6526
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6527
void Append_block_log_event::pack_info(Protocol *protocol)
6528 6529
{
  char buf[256];
6530 6531 6532
  size_t length;
  length= my_snprintf(buf, sizeof(buf), ";file_id=%u;block_len=%u",
                      file_id, block_len);
unknown's avatar
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6533
  protocol->store(buf, length, &my_charset_bin);
6534 6535 6536
}


unknown's avatar
unknown committed
6537
/*
6538
  Append_block_log_event::get_create_or_append()
unknown's avatar
unknown committed
6539 6540
*/

6541
int Append_block_log_event::get_create_or_append() const
unknown's avatar
unknown committed
6542
{
6543
  return 0; /* append to the file, fail if not exists */
unknown's avatar
unknown committed
6544 6545
}

unknown's avatar
unknown committed
6546
/*
6547
  Append_block_log_event::do_apply_event()
unknown's avatar
unknown committed
6548
*/
6549

6550
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
6551
{
6552
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
6553
  int fd;
6554
  int error = 1;
6555
  DBUG_ENTER("Append_block_log_event::do_apply_event");
6556

unknown's avatar
unknown committed
6557 6558
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
6559
  thd_proc_info(thd, proc_info);
6560 6561
  if (get_create_or_append())
  {
6562 6563 6564 6565 6566 6567
    /*
      Usually lex_start() is called by mysql_parse(), but we need it here
      as the present method does not call mysql_parse().
    */
    lex_start(thd);
    mysql_reset_thd_for_next_command(thd);
6568 6569 6570 6571 6572
    my_delete(fname, MYF(0)); // old copy may exist already
    if ((fd= my_create(fname, CREATE_MODE,
		       O_WRONLY | O_BINARY | O_EXCL | O_NOFOLLOW,
		       MYF(MY_WME))) < 0)
    {
6573 6574 6575
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
6576 6577 6578
      goto err;
    }
  }
6579 6580
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
6581
  {
6582 6583 6584
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
6585 6586
    goto err;
  }
6587 6588 6589 6590

  DBUG_EXECUTE_IF("remove_slave_load_file_before_write", 
                  my_close(fd,MYF(0)); fd= -1; my_delete(fname, MYF(0)););

6591
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6592
  {
6593 6594 6595
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
6596 6597 6598
    goto err;
  }
  error=0;
6599

6600 6601 6602
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
6603
  thd_proc_info(thd, 0);
6604
  DBUG_RETURN(error);
6605
}
unknown's avatar
SCRUM  
unknown committed
6606
#endif
6607 6608


unknown's avatar
unknown committed
6609
/**************************************************************************
unknown's avatar
unknown committed
6610
	Delete_file_log_event methods
unknown's avatar
unknown committed
6611
**************************************************************************/
6612

unknown's avatar
unknown committed
6613
/*
6614
  Delete_file_log_event ctor
unknown's avatar
unknown committed
6615
*/
6616 6617

#ifndef MYSQL_CLIENT
unknown's avatar
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6618 6619 6620
Delete_file_log_event::Delete_file_log_event(THD *thd_arg, const char* db_arg,
					     bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
6621 6622
{
}
unknown's avatar
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6623
#endif
6624

unknown's avatar
unknown committed
6625
/*
6626
  Delete_file_log_event ctor
unknown's avatar
unknown committed
6627
*/
6628

6629 6630 6631
Delete_file_log_event::Delete_file_log_event(const char* buf, uint len,
                                             const Format_description_log_event* description_event)
  :Log_event(buf, description_event),file_id(0)
6632
{
6633 6634 6635
  uint8 common_header_len= description_event->common_header_len;
  uint8 delete_file_header_len= description_event->post_header_len[DELETE_FILE_EVENT-1];
  if (len < (uint)(common_header_len + delete_file_header_len))
6636
    return;
6637
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
6638 6639 6640
}


unknown's avatar
unknown committed
6641
/*
6642
  Delete_file_log_event::write()
unknown's avatar
unknown committed
6643
*/
6644

6645
#ifndef MYSQL_CLIENT
6646
bool Delete_file_log_event::write(IO_CACHE* file)
6647
{
6648
 uchar buf[DELETE_FILE_HEADER_LEN];
6649
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
6650 6651
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
6652
}
6653
#endif
6654 6655


unknown's avatar
unknown committed
6656
/*
6657
  Delete_file_log_event::print()
unknown's avatar
unknown committed
6658
*/
6659 6660

#ifdef MYSQL_CLIENT  
unknown's avatar
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6661
void Delete_file_log_event::print(FILE* file,
unknown's avatar
unknown committed
6662
				  PRINT_EVENT_INFO* print_event_info)
6663
{
6664 6665
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
6666
  if (print_event_info->short_form)
6667
    return;
6668 6669
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
6670
}
unknown's avatar
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6671
#endif /* MYSQL_CLIENT */
6672

unknown's avatar
unknown committed
6673
/*
6674
  Delete_file_log_event::pack_info()
unknown's avatar
unknown committed
6675
*/
6676

unknown's avatar
SCRUM  
unknown committed
6677
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6678
void Delete_file_log_event::pack_info(Protocol *protocol)
6679 6680
{
  char buf[64];
6681 6682 6683
  size_t length;
  length= my_snprintf(buf, sizeof(buf), ";file_id=%u", (uint) file_id);
  protocol->store(buf, length, &my_charset_bin);
6684
}
unknown's avatar
SCRUM  
unknown committed
6685
#endif
6686

unknown's avatar
unknown committed
6687
/*
6688
  Delete_file_log_event::do_apply_event()
unknown's avatar
unknown committed
6689
*/
6690

unknown's avatar
SCRUM  
unknown committed
6691
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6692
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
6693 6694
{
  char fname[FN_REFLEN+10];
unknown's avatar
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6695
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
6696
  (void) my_delete(fname, MYF(MY_WME));
unknown's avatar
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6697
  strmov(ext, ".info");
6698
  (void) my_delete(fname, MYF(MY_WME));
6699
  return 0;
6700
}
unknown's avatar
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6701
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6702 6703


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6704
/**************************************************************************
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6705
	Execute_load_log_event methods
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**************************************************************************/
6707

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6708
/*
6709
  Execute_load_log_event ctor
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6710
*/
6711 6712

#ifndef MYSQL_CLIENT  
6713 6714
Execute_load_log_event::Execute_load_log_event(THD *thd_arg,
                                               const char* db_arg,
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					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
6717 6718
{
}
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#endif
6720 6721
  

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/*
6723
  Execute_load_log_event ctor
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*/
6725

6726 6727 6728
Execute_load_log_event::Execute_load_log_event(const char* buf, uint len,
                                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event), file_id(0)
6729
{
6730 6731 6732
  uint8 common_header_len= description_event->common_header_len;
  uint8 exec_load_header_len= description_event->post_header_len[EXEC_LOAD_EVENT-1];
  if (len < (uint)(common_header_len+exec_load_header_len))
6733
    return;
6734
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
6735 6736 6737
}


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/*
6739
  Execute_load_log_event::write()
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6740
*/
6741

6742
#ifndef MYSQL_CLIENT
6743
bool Execute_load_log_event::write(IO_CACHE* file)
6744
{
6745
  uchar buf[EXEC_LOAD_HEADER_LEN];
6746
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
6747 6748
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
6749
}
6750
#endif
6751 6752


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/*
6754
  Execute_load_log_event::print()
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*/
6756 6757

#ifdef MYSQL_CLIENT  
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void Execute_load_log_event::print(FILE* file,
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				   PRINT_EVENT_INFO* print_event_info)
6760
{
6761 6762
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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  if (print_event_info->short_form)
6764
    return;
6765 6766 6767
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
6768
}
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6769
#endif
6770

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/*
6772
  Execute_load_log_event::pack_info()
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*/
6774

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6776
void Execute_load_log_event::pack_info(Protocol *protocol)
6777 6778
{
  char buf[64];
6779 6780 6781
  size_t length;
  length= my_snprintf(buf, sizeof(buf), ";file_id=%u", (uint) file_id);
  protocol->store(buf, length, &my_charset_bin);
6782 6783 6784
}


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/*
6786
  Execute_load_log_event::do_apply_event()
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*/
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6789
int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
6790 6791
{
  char fname[FN_REFLEN+10];
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6792
  char *ext;
6793
  int fd;
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  int error= 1;
6795
  IO_CACHE file;
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  Load_log_event *lev= 0;
6797

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  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
6799 6800
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
6801 6802 6803
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6804 6805 6806
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
6807 6808
    goto err;
  }
6809
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
6810 6811
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
6812
      lev->get_type_code() != NEW_LOAD_EVENT)
6813
  {
6814
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
6815
                    "file '%s' appears corrupted", fname);
6816 6817
    goto err;
  }
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6818

6819
  lev->thd = thd;
6820
  /*
6821
    lev->do_apply_event should use rli only for errors i.e. should
6822 6823
    not advance rli's position.

6824
    lev->do_apply_event is the place where the table is loaded (it
6825
    calls mysql_load()).
6826
  */
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6827

6828
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
6829
  if (lev->do_apply_event(0,rli,1)) 
6830
  {
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    /*
      We want to indicate the name of the file that could not be loaded
      (SQL_LOADxxx).
      But as we are here we are sure the error is in rli->last_slave_error and
      rli->last_slave_errno (example of error: duplicate entry for key), so we
      don't want to overwrite it with the filename.
      What we want instead is add the filename to the current error message.
    */
6839
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
6840 6841
    if (tmp)
    {
6842
      rli->report(ERROR_LEVEL, rli->last_error().number,
6843
                  "%s. Failed executing load from '%s'", tmp, fname);
6844 6845
      my_free(tmp,MYF(0));
    }
6846 6847
    goto err;
  }
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6848 6849 6850 6851 6852 6853 6854 6855 6856 6857
  /*
    We have an open file descriptor to the .info file; we need to close it
    or Windows will refuse to delete the file in my_delete().
  */
  if (fd >= 0)
  {
    my_close(fd, MYF(0));
    end_io_cache(&file);
    fd= -1;
  }
6858
  (void) my_delete(fname, MYF(MY_WME));
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  memcpy(ext, ".data", 6);
6860
  (void) my_delete(fname, MYF(MY_WME));
6861
  error = 0;
6862

6863 6864 6865
err:
  delete lev;
  if (fd >= 0)
6866
  {
6867
    my_close(fd, MYF(0));
6868 6869
    end_io_cache(&file);
  }
6870
  return error;
6871
}
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6872

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6873
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6874 6875


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6876 6877 6878 6879 6880 6881
/**************************************************************************
	Begin_load_query_log_event methods
**************************************************************************/

#ifndef MYSQL_CLIENT
Begin_load_query_log_event::
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Begin_load_query_log_event(THD* thd_arg, const char* db_arg, uchar* block_arg,
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                           uint block_len_arg, bool using_trans)
  :Append_block_log_event(thd_arg, db_arg, block_arg, block_len_arg,
                          using_trans)
{
   file_id= thd_arg->file_id= mysql_bin_log.next_file_id();
}
#endif


Begin_load_query_log_event::
Begin_load_query_log_event(const char* buf, uint len,
                           const Format_description_log_event* desc_event)
  :Append_block_log_event(buf, len, desc_event)
{
}


#if defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6901
int Begin_load_query_log_event::get_create_or_append() const
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6902
{
6903
  return 1; /* create the file */
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6904 6905 6906 6907
}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
Log_event::enum_skip_reason
Begin_load_query_log_event::do_shall_skip(Relay_log_info *rli)
{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
  return continue_group(rli);
}
#endif


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6921 6922 6923 6924 6925 6926 6927
/**************************************************************************
	Execute_load_query_log_event methods
**************************************************************************/


#ifndef MYSQL_CLIENT
Execute_load_query_log_event::
6928
Execute_load_query_log_event(THD *thd_arg, const char* query_arg,
6929 6930 6931 6932
                             ulong query_length_arg, uint fn_pos_start_arg,
                             uint fn_pos_end_arg,
                             enum_load_dup_handling dup_handling_arg,
                             bool using_trans, bool suppress_use,
6933
                             int errcode):
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6934
  Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
6935
                  suppress_use, errcode),
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  file_id(thd_arg->file_id), fn_pos_start(fn_pos_start_arg),
  fn_pos_end(fn_pos_end_arg), dup_handling(dup_handling_arg)
{
}
#endif /* !MYSQL_CLIENT */


Execute_load_query_log_event::
Execute_load_query_log_event(const char* buf, uint event_len,
                             const Format_description_log_event* desc_event):
  Query_log_event(buf, event_len, desc_event, EXECUTE_LOAD_QUERY_EVENT),
  file_id(0), fn_pos_start(0), fn_pos_end(0)
{
  if (!Query_log_event::is_valid())
    return;

  buf+= desc_event->common_header_len;

  fn_pos_start= uint4korr(buf + ELQ_FN_POS_START_OFFSET);
  fn_pos_end= uint4korr(buf + ELQ_FN_POS_END_OFFSET);
  dup_handling= (enum_load_dup_handling)(*(buf + ELQ_DUP_HANDLING_OFFSET));

  if (fn_pos_start > q_len || fn_pos_end > q_len ||
      dup_handling > LOAD_DUP_REPLACE)
    return;

  file_id= uint4korr(buf + ELQ_FILE_ID_OFFSET);
}


ulong Execute_load_query_log_event::get_post_header_size_for_derived()
{
  return EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN;
}


6972
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
6976
  uchar buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
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  int4store(buf, file_id);
  int4store(buf + 4, fn_pos_start);
  int4store(buf + 4 + 4, fn_pos_end);
6980 6981
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
6983
#endif
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#ifdef MYSQL_CLIENT
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info)
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{
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6990
  print(file, print_event_info, 0);
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}

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/**
  Prints the query as LOAD DATA LOCAL and with rewritten filename.
*/
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info,
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                                         const char *local_fname)
{
7000 7001 7002
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
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  if (local_fname)
  {
7006
    my_b_write(&cache, (uchar*) query, fn_pos_start);
7007
    my_b_printf(&cache, " LOCAL INFILE \'");
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7008
    my_b_printf(&cache, "%s", local_fname);
7009
    my_b_printf(&cache, "\'");
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7010
    if (dup_handling == LOAD_DUP_REPLACE)
7011
      my_b_printf(&cache, " REPLACE");
7012
    my_b_printf(&cache, " INTO");
7013
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
7014
    my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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  }
  else
  {
7018
    my_b_write(&cache, (uchar*) query, q_len);
7019
    my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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  }

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  if (!print_event_info->short_form)
7023
    my_b_printf(&cache, "# file_id: %d \n", file_id);
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}
#endif


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_query_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
7032
  if (!(buf= (char*) my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME))))
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    return;
  pos= buf;
  if (db && db_len)
  {
    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
    pos= strmov(pos+db_len, "`; ");
  }
  if (query && q_len)
  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
  pos= strmov(pos, " ;file_id=");
  pos= int10_to_str((long) file_id, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}


int
7054
Execute_load_query_log_event::do_apply_event(Relay_log_info const *rli)
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{
  char *p;
  char *buf;
  char *fname;
  char *fname_end;
  int error;

7062 7063
  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
7064

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7065
  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
7066

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  /* Replace filename and LOCAL keyword in query before executing it */
7068
  if (buf == NULL)
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  {
7070 7071
    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), "Not enough memory");
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    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
7078
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
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  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
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  *(p++)='\'';
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  switch (dup_handling) {
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7083
  case LOAD_DUP_IGNORE:
7084
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
7087
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
7093
  p= strmake(p, STRING_WITH_LEN(" INTO "));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

7096
  error= Query_log_event::do_apply_event(rli, buf, p-buf);
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  /* Forging file name for deletion in same buffer */
  *fname_end= 0;

7101 7102 7103 7104 7105 7106
  /*
    If there was an error the slave is going to stop, leave the
    file so that we can re-execute this event at START SLAVE.
  */
  if (!error)
    (void) my_delete(fname, MYF(MY_WME));
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
  return error;
}
#endif


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7114
/**************************************************************************
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7115
	sql_ex_info methods
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**************************************************************************/
7117

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/*
7119
  sql_ex_info::write_data()
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*/
7121

7122
bool sql_ex_info::write_data(IO_CACHE* file)
7123 7124 7125
{
  if (new_format())
  {
7126 7127 7128 7129 7130
    return (write_str(file, field_term, (uint) field_term_len) ||
	    write_str(file, enclosed,   (uint) enclosed_len) ||
	    write_str(file, line_term,  (uint) line_term_len) ||
	    write_str(file, line_start, (uint) line_start_len) ||
	    write_str(file, escaped,    (uint) escaped_len) ||
7131
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
7132 7133 7134
  }
  else
  {
7135 7136 7137 7138
    /**
      @todo This is sensitive to field padding. We should write a
      char[7], not an old_sql_ex. /sven
    */
7139 7140 7141 7142 7143 7144 7145 7146
    old_sql_ex old_ex;
    old_ex.field_term= *field_term;
    old_ex.enclosed=   *enclosed;
    old_ex.line_term=  *line_term;
    old_ex.line_start= *line_start;
    old_ex.escaped=    *escaped;
    old_ex.opt_flags=  opt_flags;
    old_ex.empty_flags=empty_flags;
7147
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
7148 7149 7150 7151
  }
}


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7152
/*
7153
  sql_ex_info::init()
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7154
*/
7155

7156 7157
const char *sql_ex_info::init(const char *buf, const char *buf_end,
                              bool use_new_format)
7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169
{
  cached_new_format = use_new_format;
  if (use_new_format)
  {
    empty_flags=0;
    /*
      The code below assumes that buf will not disappear from
      under our feet during the lifetime of the event. This assumption
      holds true in the slave thread if the log is in new format, but is not
      the case when we have old format because we will be reusing net buffer
      to read the actual file before we write out the Create_file event.
    */
7170 7171 7172 7173 7174
    if (read_str(&buf, buf_end, &field_term, &field_term_len) ||
        read_str(&buf, buf_end, &enclosed,   &enclosed_len) ||
        read_str(&buf, buf_end, &line_term,  &line_term_len) ||
        read_str(&buf, buf_end, &line_start, &line_start_len) ||
        read_str(&buf, buf_end, &escaped,    &escaped_len))
7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200
      return 0;
    opt_flags = *buf++;
  }
  else
  {
    field_term_len= enclosed_len= line_term_len= line_start_len= escaped_len=1;
    field_term = buf++;			// Use first byte in string
    enclosed=	 buf++;
    line_term=   buf++;
    line_start=  buf++;
    escaped=     buf++;
    opt_flags =  *buf++;
    empty_flags= *buf++;
    if (empty_flags & FIELD_TERM_EMPTY)
      field_term_len=0;
    if (empty_flags & ENCLOSED_EMPTY)
      enclosed_len=0;
    if (empty_flags & LINE_TERM_EMPTY)
      line_term_len=0;
    if (empty_flags & LINE_START_EMPTY)
      line_start_len=0;
    if (empty_flags & ESCAPED_EMPTY)
      escaped_len=0;
  }
  return buf;
}
7201 7202 7203 7204 7205 7206 7207 7208 7209 7210


/**************************************************************************
	Rows_log_event member functions
**************************************************************************/

#ifndef MYSQL_CLIENT
Rows_log_event::Rows_log_event(THD *thd_arg, TABLE *tbl_arg, ulong tid,
                               MY_BITMAP const *cols, bool is_transactional)
  : Log_event(thd_arg, 0, is_transactional),
7211
    m_row_count(0),
7212 7213
    m_table(tbl_arg),
    m_table_id(tid),
7214
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
7215 7216
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0) 
#ifdef HAVE_REPLICATION
7217
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
7218
#endif
7219
{
7220 7221
  /*
    We allow a special form of dummy event when the table, and cols
7222
    are null and the table id is ~0UL.  This is a temporary
7223
    solution, to be able to terminate a started statement in the
7224
    binary log: the extraneous events will be removed in the future.
7225
   */
7226 7227
  DBUG_ASSERT((tbl_arg && tbl_arg->s && tid != ~0UL) ||
              (!tbl_arg && !cols && tid == ~0UL));
7228 7229 7230 7231 7232

  if (thd_arg->options & OPTION_NO_FOREIGN_KEY_CHECKS)
      set_flags(NO_FOREIGN_KEY_CHECKS_F);
  if (thd_arg->options & OPTION_RELAXED_UNIQUE_CHECKS)
      set_flags(RELAXED_UNIQUE_CHECKS_F);
7233
  /* if bitmap_init fails, caught in is_valid() */
7234 7235
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
7236
                          m_width,
7237
                          false)))
7238 7239 7240
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
7241
    {
7242
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
7243 7244
      create_last_word_mask(&m_cols);
    }
7245
  }
7246
  else
7247 7248 7249 7250
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
7251 7252 7253 7254 7255 7256 7257 7258
}
#endif

Rows_log_event::Rows_log_event(const char *buf, uint event_len,
                               Log_event_type event_type,
                               const Format_description_log_event
                               *description_event)
  : Log_event(buf, description_event),
7259
    m_row_count(0),
7260
#ifndef MYSQL_CLIENT
7261
    m_table(NULL),
7262 7263 7264
#endif
    m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7265
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
7266
#endif
7267 7268 7269 7270 7271
{
  DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
  uint8 const common_header_len= description_event->common_header_len;
  uint8 const post_header_len= description_event->post_header_len[event_type-1];

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7272 7273
  DBUG_PRINT("enter",("event_len: %u  common_header_len: %d  "
		      "post_header_len: %d",
7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286
		      event_len, common_header_len,
		      post_header_len));

  const char *post_start= buf + common_header_len;
  post_start+= RW_MAPID_OFFSET;
  if (post_header_len == 6)
  {
    /* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
    m_table_id= uint4korr(post_start);
    post_start+= 4;
  }
  else
  {
7287
    m_table_id= (ulong) uint6korr(post_start);
7288 7289 7290 7291 7292
    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

7293 7294 7295
  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
7296
  uchar *ptr_after_width= (uchar*) ptr_width;
7297
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
7298
  m_width = net_field_length(&ptr_after_width);
7299 7300 7301 7302
  DBUG_PRINT("debug", ("m_width=%lu", m_width));
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
7303
                          m_width,
7304 7305 7306 7307
                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
7308
    create_last_word_mask(&m_cols);
7309
    ptr_after_width+= (m_width + 7) / 8;
7310
    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
7311 7312 7313 7314 7315 7316 7317
  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
7318

7319 7320 7321 7322 7323 7324
  m_cols_ai.bitmap= m_cols.bitmap; /* See explanation in is_valid() */

  if (event_type == UPDATE_ROWS_EVENT)
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));

7325
    /* if bitmap_init fails, caught in is_valid() */
7326 7327
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
7328
                            m_width,
7329 7330 7331 7332
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
7333
      create_last_word_mask(&m_cols_ai);
7334
      ptr_after_width+= (m_width + 7) / 8;
7335 7336
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
7337 7338 7339 7340 7341 7342 7343 7344 7345
    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

7346
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
7347

7348
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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7349
  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
7350
                     m_table_id, m_flags, m_width, (ulong) data_size));
7351

7352
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
7353 7354
  if (likely((bool)m_rows_buf))
  {
7355
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7356
    m_curr_row= m_rows_buf;
7357
#endif
7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372
    m_rows_end= m_rows_buf + data_size;
    m_rows_cur= m_rows_end;
    memcpy(m_rows_buf, ptr_rows_data, data_size);
  }
  else
    m_cols.bitmap= 0; // to not free it

  DBUG_VOID_RETURN;
}

Rows_log_event::~Rows_log_event()
{
  if (m_cols.bitmap == m_bitbuf) // no my_malloc happened
    m_cols.bitmap= 0; // so no my_free in bitmap_free
  bitmap_free(&m_cols); // To pair with bitmap_init().
7373
  my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
7374 7375
}

7376 7377 7378 7379
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

7380 7381
  uchar buf[sizeof(m_width) + 1];
  uchar *end= net_store_length(buf, m_width);
7382 7383 7384 7385 7386 7387 7388

  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  return 6 + no_bytes_in_map(&m_cols) + (end - buf) +
                  (type_code == UPDATE_ROWS_EVENT ? no_bytes_in_map(&m_cols_ai) : 0) +
                  (m_rows_cur - m_rows_buf););
  int data_size= ROWS_HEADER_LEN;
  data_size+= no_bytes_in_map(&m_cols);
7389
  data_size+= (uint) (end - buf);
7390 7391 7392 7393

  if (type_code == UPDATE_ROWS_EVENT)
    data_size+= no_bytes_in_map(&m_cols_ai);

7394
  data_size+= (uint) (m_rows_cur - m_rows_buf);
7395 7396 7397 7398
  return data_size; 
}


7399
#ifndef MYSQL_CLIENT
7400
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
7401 7402 7403 7404 7405 7406
{
  /*
    When the table has a primary key, we would probably want, by default, to
    log only the primary key value instead of the entire "before image". This
    would save binlog space. TODO
  */
7407
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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7408 7409
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
7410 7411 7412 7413 7414
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7415
  DBUG_DUMP("row_data", row_data, min(length, 32));
7416
#endif
7417 7418

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
7419
  DBUG_ASSERT(!m_rows_buf || (m_rows_end && m_rows_buf < m_rows_end));
7420 7421 7422
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
7423
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
7424
  {
7425
    size_t const block_size= 1024;
7426
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
7427
    my_ptrdiff_t const new_alloc= 
7428
        block_size * ((cur_size + length + block_size - 1) / block_size);
7429

7430
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
7431
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448
    if (unlikely(!new_buf))
      DBUG_RETURN(HA_ERR_OUT_OF_MEM);

    /* If the memory moved, we need to move the pointers */
    if (new_buf != m_rows_buf)
    {
      m_rows_buf= new_buf;
      m_rows_cur= m_rows_buf + cur_size;
    }

    /*
       The end pointer should always be changed to point to the end of
       the allocated memory.
    */
    m_rows_end= m_rows_buf + new_alloc;
  }

7449
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
7450 7451
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
7452
  m_row_count++;
7453 7454 7455 7456 7457
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7458
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
7459
{
7460
  DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
7461
  int error= 0;
7462
  /*
7463 7464 7465
    If m_table_id == ~0UL, then we have a dummy event that does not
    contain any data.  In that case, we just remove all tables in the
    tables_to_lock list, close the thread tables, and return with
7466
    success.
7467
   */
7468
  if (m_table_id == ~0UL)
7469 7470 7471 7472 7473 7474 7475
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

7476
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7477
    close_thread_tables(thd);
7478 7479 7480
    thd->clear_error();
    DBUG_RETURN(0);
  }
7481 7482 7483

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
7484
    do_apply_event(). We still check here to prevent future coding
7485
    errors.
7486 7487 7488 7489
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
7490 7491 7492 7493
    If there is no locks taken, this is the first binrow event seen
    after the table map events.  We should then lock all the tables
    used in the transaction and proceed with execution of the actual
    event.
7494
  */
7495
  if (!thd->lock)
7496 7497
  {
    /*
7498 7499 7500 7501 7502 7503 7504
      Lock_tables() reads the contents of thd->lex, so they must be
      initialized.

      We also call the mysql_reset_thd_for_next_command(), since this
      is the logical start of the next "statement". Note that this
      call might reset the value of current_stmt_binlog_row_based, so
      we need to do any changes to that value after this function.
7505
    */
7506
    lex_start(thd);
7507
    mysql_reset_thd_for_next_command(thd);
7508 7509 7510 7511 7512 7513
    /*
      The current statement is just about to begin and 
      has not yet modified anything. Note, all.modified is reset
      by mysql_reset_thd_for_next_command.
    */
    thd->transaction.stmt.modified_non_trans_table= FALSE;
7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524
    /*
      Check if the slave is set to use SBR.  If so, it should switch
      to using RBR until the end of the "statement", i.e., next
      STMT_END_F or next error.
    */
    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
    {
      thd->set_current_stmt_binlog_row_based();
    }

7525

7526 7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542
    /*
      There are a few flags that are replicated with each row event.
      Make sure to set/clear them before executing the main body of
      the event.
    */
    if (get_flags(NO_FOREIGN_KEY_CHECKS_F))
        thd->options|= OPTION_NO_FOREIGN_KEY_CHECKS;
    else
        thd->options&= ~OPTION_NO_FOREIGN_KEY_CHECKS;

    if (get_flags(RELAXED_UNIQUE_CHECKS_F))
        thd->options|= OPTION_RELAXED_UNIQUE_CHECKS;
    else
        thd->options&= ~OPTION_RELAXED_UNIQUE_CHECKS;
    /* A small test to verify that objects have consistent types */
    DBUG_ASSERT(sizeof(thd->options) == sizeof(OPTION_RELAXED_UNIQUE_CHECKS));

7543
    if (simple_open_n_lock_tables(thd, rli->tables_to_lock))
7544
    {
7545 7546
      uint actual_error= thd->main_da.sql_errno();
      if (thd->is_slave_error || thd->is_fatal_error)
7547
      {
7548 7549
        /*
          Error reporting borrowed from Query_log_event with many excessive
7550 7551 7552
          simplifications. 
          We should not honour --slave-skip-errors at this point as we are
          having severe errors which should not be skiped.
7553 7554 7555 7556 7557 7558
        */
        rli->report(ERROR_LEVEL, actual_error,
                    "Error '%s' on opening tables",
                    (actual_error ? thd->main_da.message() :
                     "unexpected success or fatal error"));
        thd->is_slave_error= 1;
7559
      }
7560 7561
      const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
      DBUG_RETURN(actual_error);
7562
    }
7563 7564 7565 7566 7567 7568 7569 7570 7571 7572

    /*
      When the open and locking succeeded, we check all tables to
      ensure that they still have the correct type.

      We can use a down cast here since we know that every table added
      to the tables_to_lock is a RPL_TABLE_LIST.
    */

    {
7573
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
7574 7575 7576 7577
      for ( ; ptr ; ptr= static_cast<RPL_TABLE_LIST*>(ptr->next_global))
      {
        if (ptr->m_tabledef.compatible_with(rli, ptr->table))
        {
7578 7579 7580 7581
          /*
            We should not honour --slave-skip-errors at this point as we are
            having severe errors which should not be skiped.
          */
7582 7583
          mysql_unlock_tables(thd, thd->lock);
          thd->lock= 0;
7584
          thd->is_slave_error= 1;
7585
          const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7586 7587 7588 7589 7590
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

7591
    /*
7592 7593
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
7594 7595 7596

      We also invalidate the query cache for all the tables, since
      they will now be changed.
7597 7598 7599 7600 7601 7602 7603

      TODO [/Matz]: Maybe the query cache should not be invalidated
      here? It might be that a table is not changed, even though it
      was locked for the statement.  We do know that each
      Rows_log_event contain at least one row, so after processing one
      Rows_log_event, we can invalidate the query cache for the
      associated table.
7604
     */
7605
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
7606
    {
7607
      const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
7608
    }
7609 7610 7611
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
7612 7613
  }

7614 7615
  TABLE* 
    table= 
7616
    m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
7617

7618 7619
  DBUG_PRINT("debug", ("m_table: 0x%lx, m_table_id: %lu", (ulong) m_table, m_table_id));

7620 7621
  if (table)
  {
7622
    bool transactional_table= table->file->has_transactions();
7623 7624
    /*
      table == NULL means that this table should not be replicated
7625
      (this was set up by Table_map_log_event::do_apply_event()
7626
      which tested replicate-* rules).
7627
    */
7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638

    /*
      It's not needed to set_time() but
      1) it continues the property that "Time" in SHOW PROCESSLIST shows how
      much slave is behind
      2) it will be needed when we allow replication from a table with no
      TIMESTAMP column to a table with one.
      So we call set_time(), like in SBR. Presently it changes nothing.
    */
    thd->set_time((time_t)when);

7639 7640 7641 7642 7643 7644 7645 7646 7647
    /*
      Now we are in a statement and will stay in a statement until we
      see a STMT_END_F.

      We set this flag here, before actually applying any rows, in
      case the SQL thread is stopped and we need to detect that we're
      inside a statement and halting abruptly might cause problems
      when restarting.
     */
7648
    const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
7649

7650 7651
     if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
      set_flags(COMPLETE_ROWS_F);
7652

7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668
    /* 
      Set tables write and read sets.
      
      Read_set contains all slave columns (in case we are going to fetch
      a complete record from slave)
      
      Write_set equals the m_cols bitmap sent from master but it can be 
      longer if slave has extra columns. 
     */ 

    DBUG_PRINT_BITSET("debug", "Setting table's write_set from: %s", &m_cols);
    
    bitmap_set_all(table->read_set);
    bitmap_set_all(table->write_set);
    if (!get_flags(COMPLETE_ROWS_F))
      bitmap_intersect(table->write_set,&m_cols);
7669

7670 7671
    this->slave_exec_mode= slave_exec_mode_options; // fix the mode

7672 7673
    // Do event specific preparations 
    error= do_before_row_operations(rli);
7674

7675 7676 7677 7678 7679 7680 7681 7682
    /*
      Bug#56662 Assertion failed: next_insert_id == 0, file handler.cc
      Don't allow generation of auto_increment value when processing
      rows event by setting 'MODE_NO_AUTO_VALUE_ON_ZERO'.
    */
    ulong saved_sql_mode= thd->variables.sql_mode;
    thd->variables.sql_mode= MODE_NO_AUTO_VALUE_ON_ZERO;

7683
    // row processing loop
7684

7685 7686
    while (error == 0 && m_curr_row < m_rows_end)
    {
7687 7688 7689 7690
      /* in_use can have been set to NULL in close_tables_for_reopen */
      THD* old_thd= table->in_use;
      if (!table->in_use)
        table->in_use= thd;
7691 7692 7693

      error= do_exec_row(rli);

7694 7695
      if (error)
        DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
7696 7697
      DBUG_ASSERT(error != HA_ERR_RECORD_DELETED);

7698
      table->in_use = old_thd;
7699

7700 7701 7702 7703
      if (error)
      {
        int actual_error= convert_handler_error(error, thd, table);
        bool idempotent_error= (idempotent_error_code(error) &&
7704
                               (slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT));
7705 7706 7707 7708
        bool ignored_error= (idempotent_error == 0 ?
                             ignored_error_code(actual_error) : 0);

        if (idempotent_error || ignored_error)
7709 7710 7711 7712 7713
        {
          if (global_system_variables.log_warnings)
            slave_rows_error_report(WARNING_LEVEL, error, rli, thd, table,
                                    get_type_str(),
                                    RPL_LOG_NAME, (ulong) log_pos);
7714
          clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
7715
          error= 0;
7716 7717
          if (idempotent_error == 0)
            break;
7718
        }
7719 7720
      }

7721 7722 7723 7724 7725 7726 7727
      /*
       If m_curr_row_end  was not set during event execution (e.g., because
       of errors) we can't proceed to the next row. If the error is transient
       (i.e., error==0 at this point) we must call unpack_current_row() to set 
       m_curr_row_end.
      */ 
   
7728 7729 7730
      DBUG_PRINT("info", ("curr_row: 0x%lu; curr_row_end: 0x%lu; rows_end: 0x%lu",
                          (ulong) m_curr_row, (ulong) m_curr_row_end, (ulong) m_rows_end));

7731
      if (!m_curr_row_end && !error)
7732
        error= unpack_current_row(rli);
7733 7734 7735 7736 7737 7738 7739 7740
  
      // at this moment m_curr_row_end should be set
      DBUG_ASSERT(error || m_curr_row_end != NULL); 
      DBUG_ASSERT(error || m_curr_row < m_curr_row_end);
      DBUG_ASSERT(error || m_curr_row_end <= m_rows_end);
  
      m_curr_row= m_curr_row_end;
 
7741 7742 7743
      if (error == 0 && !transactional_table)
        thd->transaction.all.modified_non_trans_table=
          thd->transaction.stmt.modified_non_trans_table= TRUE;
7744 7745
    } // row processing loop

7746 7747 7748 7749 7750
    /*
      Restore the sql_mode after the rows event is processed.
    */
    thd->variables.sql_mode= saved_sql_mode;

7751
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
7752
                    const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
7753 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764

    if ((error= do_after_row_operations(rli, error)) &&
        ignored_error_code(convert_handler_error(error, thd, table)))
    {

      if (global_system_variables.log_warnings)
        slave_rows_error_report(WARNING_LEVEL, error, rli, thd, table,
                                get_type_str(),
                                RPL_LOG_NAME, (ulong) log_pos);
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
      error= 0;
    }
7765
  } // if (table)
7766

7767
  /*
7768 7769
    We need to delay this clear until here bacause unpack_current_row() uses
    master-side table definitions stored in rli.
7770 7771
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
7772
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
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  if (error)
  {
7776 7777 7778
    slave_rows_error_report(ERROR_LEVEL, error, rli, thd, table,
                             get_type_str(),
                             RPL_LOG_NAME, (ulong) log_pos);
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    thd->reset_current_stmt_binlog_row_based();
7780
    thd->is_slave_error= 1;
7781
    DBUG_RETURN(error);
7782
  }
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  /*
    This code would ideally be placed in do_update_pos() instead, but
    since we have no access to table there, we do the setting of
    last_event_start_time here instead.
  */
7788 7789
  else if (table && (table->s->primary_key == MAX_KEY) &&
           !cache_stmt && get_flags(STMT_END_F) == RLE_NO_FLAGS)
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  {
    /*
      ------------ Temporary fix until WL#2975 is implemented ---------

      This event is not the last one (no STMT_END_F). If we stop now
      (in case of terminate_slave_thread()), how will we restart? We
      have to restart from Table_map_log_event, but as this table is
      not transactional, the rows already inserted will still be
      present, and idempotency is not guaranteed (no PK) so we risk
      that repeating leads to double insert. So we desperately try to
      continue, hope we'll eventually leave this buggy situation (by
      executing the final Rows_log_event). If we are in a hopeless
      wait (reached end of last relay log and nothing gets appended
      there), we timeout after one minute, and notify DBA about the
      problem.  When WL#2975 is implemented, just remove the member
7805
      Relay_log_info::last_event_start_time and all its occurrences.
7806
    */
7807
    const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
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  }

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  if (get_flags(STMT_END_F) && (error= rows_event_stmt_cleanup(rli, thd)))
    slave_rows_error_report(ERROR_LEVEL,
                            thd->is_error() ? 0 : error,
                            rli, thd, table,
                            get_type_str(),
                            RPL_LOG_NAME, (ulong) log_pos);
7816
  DBUG_RETURN(error);
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}

7819
Log_event::enum_skip_reason
7820
Rows_log_event::do_shall_skip(Relay_log_info *rli)
7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831 7832
{
  /*
    If the slave skip counter is 1 and this event does not end a
    statement, then we should not start executing on the next event.
    Otherwise, we defer the decision to the normal skipping logic.
  */
  if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}

7833 7834 7835 7836 7837 7838 7839 7840 7841 7842
/**
   The function is called at Rows_log_event statement commit time,
   normally from Rows_log_event::do_update_pos() and possibly from
   Query_log_event::do_apply_event() of the COMMIT.
   The function commits the last statement for engines, binlog and
   releases resources have been allocated for the statement.
  
   @retval  0         Ok.
   @retval  non-zero  Error at the commit.
 */
7843

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static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD * thd)
{
  int error;
7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862
  {
    /*
      This is the end of a statement or transaction, so close (and
      unlock) the tables we opened when processing the
      Table_map_log_event starting the statement.

      OBSERVER.  This will clear *all* mappings, not only those that
      are open for the table. There is not good handle for on-close
      actions for tables.

      NOTE. Even if we have no table ('table' == 0) we still need to be
      here, so that we increase the group relay log position. If we didn't, we
      could have a group relay log position which lags behind "forever"
      (assume the last master's transaction is ignored by the slave because of
      replicate-ignore rules).
    */
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7863
    error= thd->binlog_flush_pending_rows_event(true);
7864

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    /*
      If this event is not in a transaction, the call below will, if some
      transactional storage engines are involved, commit the statement into
      them and flush the pending event to binlog.
      If this event is in a transaction, the call will do nothing, but a
      Xid_log_event will come next which will, if some transactional engines
      are involved, commit the transaction and flush the pending event to the
      binlog.
    */
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    error|= ha_autocommit_or_rollback(thd, error);
7875

7876 7877 7878 7879 7880 7881 7882 7883 7884 7885
    /*
      Now what if this is not a transactional engine? we still need to
      flush the pending event to the binlog; we did it with
      thd->binlog_flush_pending_rows_event(). Note that we imitate
      what is done for real queries: a call to
      ha_autocommit_or_rollback() (sometimes only if involves a
      transactional engine), and a call to be sure to have the pending
      event flushed.
    */

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7886
    thd->reset_current_stmt_binlog_row_based();
7887

7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 0);
  }
  return error;
}

/**
   The method either increments the relay log position or
   commits the current statement and increments the master group 
   possition if the event is STMT_END_F flagged and
   the statement corresponds to the autocommit query (i.e replicated
   without wrapping in BEGIN/COMMIT)

   @retval 0         Success
   @retval non-zero  Error in the statement commit
 */
int
Rows_log_event::do_update_pos(Relay_log_info *rli)
{
  DBUG_ENTER("Rows_log_event::do_update_pos");
  int error= 0;

  DBUG_PRINT("info", ("flags: %s",
                      get_flags(STMT_END_F) ? "STMT_END_F " : ""));

  if (get_flags(STMT_END_F))
  {
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    /*
      Indicate that a statement is finished.
      Step the group log position if we are not in a transaction,
      otherwise increase the event log position.
    */
    rli->stmt_done(log_pos, when);
    /*
      Clear any errors in thd->net.last_err*. It is not known if this is
      needed or not. It is believed that any errors that may exist in
      thd->net.last_err* are allowed. Examples of errors are "key not
      found", which is produced in the test case rpl_row_conflicts.test
    */
    thd->clear_error();
7927
  }
7928
  else
7929
  {
7930
    rli->inc_event_relay_log_pos();
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  }

7933
  DBUG_RETURN(error);
7934
}
7935

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#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
7941
  uchar buf[ROWS_HEADER_LEN];	// No need to init the buffer
7942
  DBUG_ASSERT(m_table_id != ~0UL);
7943 7944 7945 7946 7947 7948 7949 7950 7951 7952 7953 7954 7955 7956 7957 7958 7959
  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + RW_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + RW_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, ROWS_HEADER_LEN));
}

bool Rows_log_event::write_data_body(IO_CACHE*file)
{
  /*
     Note that this should be the number of *bits*, not the number of
     bytes.
  */
7960
  uchar sbuf[sizeof(m_width) + 1];
7961
  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
7962
  bool res= false;
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  uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
  DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
7965

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  DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
  res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
7968

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  DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
  res= res || my_b_safe_write(file, (uchar*) m_cols.bitmap,
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                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
7977 7978 7979
    DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
              no_bytes_in_map(&m_cols_ai));
    res= res || my_b_safe_write(file, (uchar*) m_cols_ai.bitmap,
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                                no_bytes_in_map(&m_cols_ai));
  }
7982 7983
  DBUG_DUMP("rows", m_rows_buf, data_size);
  res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
7984 7985 7986

  return res;

7987 7988 7989
}
#endif

7990
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
7991 7992
void Rows_log_event::pack_info(Protocol *protocol)
{
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  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
7996
  size_t bytes= my_snprintf(buf, sizeof(buf),
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                               "table_id: %lu%s", m_table_id, flagstr);
7998
  protocol->store(buf, bytes, &my_charset_bin);
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}
#endif

8002 8003 8004 8005 8006 8007 8008 8009 8010 8011 8012
#ifdef MYSQL_CLIENT
void Rows_log_event::print_helper(FILE *file,
                                  PRINT_EVENT_INFO *print_event_info,
                                  char const *const name)
{
  IO_CACHE *const head= &print_event_info->head_cache;
  IO_CACHE *const body= &print_event_info->body_cache;
  if (!print_event_info->short_form)
  {
    bool const last_stmt_event= get_flags(STMT_END_F);
    print_header(head, print_event_info, !last_stmt_event);
8013 8014 8015
    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
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    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
8021 8022
    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
8023 8024 8025 8026
  }
}
#endif

8027
/**************************************************************************
8028
	Table_map_log_event member functions and support functions
8029 8030
**************************************************************************/

8031 8032 8033 8034
/**
  @page How replication of field metadata works.
  
  When a table map is created, the master first calls 
8035
  Table_map_log_event::save_field_metadata() which calculates how many 
8036
  values will be in the field metadata. Only those fields that require the 
8037 8038 8039 8040 8041 8042 8043
  extra data are added. The method also loops through all of the fields in 
  the table calling the method Field::save_field_metadata() which returns the
  values for the field that will be saved in the metadata and replicated to
  the slave. Once all fields have been processed, the table map is written to
  the binlog adding the size of the field metadata and the field metadata to
  the end of the body of the table map.

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  When a table map is read on the slave, the field metadata is read from the 
  table map and passed to the table_def class constructor which saves the 
  field metadata from the table map into an array based on the type of the 
  field. Field metadata values not present (those fields that do not use extra 
  data) in the table map are initialized as zero (0). The array size is the 
  same as the columns for the table on the slave.

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  Additionally, values saved for field metadata on the master are saved as a 
  string of bytes (uchar) in the binlog. A field may require 1 or more bytes
  to store the information. In cases where values require multiple bytes 
  (e.g. values > 255), the endian-safe methods are used to properly encode 
  the values on the master and decode them on the slave. When the field
  metadata values are captured on the slave, they are stored in an array of
  type uint16. This allows the least number of casts to prevent casting bugs
  when the field metadata is used in comparisons of field attributes. When
  the field metadata is used for calculating addresses in pointer math, the
  type used is uint32. 
8061 8062
*/

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8063
#if !defined(MYSQL_CLIENT)
8064 8065 8066 8067 8068 8069
/**
  Save the field metadata based on the real_type of the field.
  The metadata saved depends on the type of the field. Some fields
  store a single byte for pack_length() while others store two bytes
  for field_length (max length).
  
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8070
  @retval  0  Ok.
8071

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8072 8073
  @todo
  We may want to consider changing the encoding of the information.
8074 8075 8076 8077 8078 8079 8080 8081 8082 8083 8084 8085 8086 8087 8088 8089 8090 8091 8092
  Currently, the code attempts to minimize the number of bytes written to 
  the tablemap. There are at least two other alternatives; 1) using 
  net_store_length() to store the data allowing it to choose the number of
  bytes that are appropriate thereby making the code much easier to 
  maintain (only 1 place to change the encoding), or 2) use a fixed number
  of bytes for each field. The problem with option 1 is that net_store_length()
  will use one byte if the value < 251, but 3 bytes if it is > 250. Thus,
  for fields like CHAR which can be no larger than 255 characters, the method
  will use 3 bytes when the value is > 250. Further, every value that is
  encoded using 2 parts (e.g., pack_length, field_length) will be numerically
  > 250 therefore will use 3 bytes for eah value. The problem with option 2
  is less wasteful for space but does waste 1 byte for every field that does
  not encode 2 parts. 
*/
int Table_map_log_event::save_field_metadata()
{
  DBUG_ENTER("Table_map_log_event::save_field_metadata");
  int index= 0;
  for (unsigned int i= 0 ; i < m_table->s->fields ; i++)
8093 8094
    index+= m_table->s->field[i]->save_field_metadata(&m_field_metadata[index]);
  DBUG_RETURN(index);
8095 8096 8097
}
#endif /* !defined(MYSQL_CLIENT) */

8098 8099 8100 8101 8102 8103 8104
/*
  Constructor used to build an event for writing to the binary log.
  Mats says tbl->s lives longer than this event so it's ok to copy pointers
  (tbl->s->db etc) and not pointer content.
 */
#if !defined(MYSQL_CLIENT)
Table_map_log_event::Table_map_log_event(THD *thd, TABLE *tbl, ulong tid,
8105
                                         bool is_transactional)
8106
  : Log_event(thd, 0, true),
8107 8108 8109 8110 8111
    m_table(tbl),
    m_dbnam(tbl->s->db.str),
    m_dblen(m_dbnam ? tbl->s->db.length : 0),
    m_tblnam(tbl->s->table_name.str),
    m_tbllen(tbl->s->table_name.length),
8112 8113 8114
    m_colcnt(tbl->s->fields),
    m_memory(NULL),
    m_table_id(tid),
8115
    m_flags(TM_BIT_LEN_EXACT_F),
8116 8117 8118 8119 8120
    m_data_size(0),
    m_field_metadata(0),
    m_field_metadata_size(0),
    m_null_bits(0),
    m_meta_memory(NULL)
8121
{
8122 8123
  uchar cbuf[sizeof(m_colcnt) + 1];
  uchar *cbuf_end;
8124
  DBUG_ASSERT(m_table_id != ~0UL);
8125 8126 8127 8128 8129 8130 8131 8132 8133 8134 8135 8136
  /*
    In TABLE_SHARE, "db" and "table_name" are 0-terminated (see this comment in
    table.cc / alloc_table_share():
      Use the fact the key is db/0/table_name/0
    As we rely on this let's assert it.
  */
  DBUG_ASSERT((tbl->s->db.str == 0) ||
              (tbl->s->db.str[tbl->s->db.length] == 0));
  DBUG_ASSERT(tbl->s->table_name.str[tbl->s->table_name.length] == 0);


  m_data_size=  TABLE_MAP_HEADER_LEN;
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;);
8138 8139
  m_data_size+= m_dblen + 2;	// Include length and terminating \0
  m_data_size+= m_tbllen + 2;	// Include length and terminating \0
8140
  cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
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8141
  DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
8142
  m_data_size+= (cbuf_end - cbuf) + m_colcnt;	// COLCNT and column types
8143

8144
  /* If malloc fails, caught in is_valid() */
8145
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
8146
  {
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    m_coltype= reinterpret_cast<uchar*>(m_memory);
8148 8149 8150
    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
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  /*
    Calculate a bitmap for the results of maybe_null() for all columns.
    The bitmap is used to determine when there is a column from the master
    that is not on the slave and is null and thus not in the row data during
    replication.
  */
  uint num_null_bytes= (m_table->s->fields + 7) / 8;
  m_data_size+= num_null_bytes;
  m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                 &m_null_bits, num_null_bytes,
8162
                                 &m_field_metadata, (m_colcnt * 2),
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                                 NULL);
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  bzero(m_field_metadata, (m_colcnt * 2));

  /*
    Create an array for the field metadata and store it.
  */
  m_field_metadata_size= save_field_metadata();
  DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));

  /*
    Now set the size of the data to the size of the field metadata array
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    plus one or three bytes (see pack.c:net_store_length) for number of 
    elements in the field metadata array.
8177
  */
8178
  if (m_field_metadata_size < 251)
8179
    m_data_size+= m_field_metadata_size + 1; 
8180 8181
  else
    m_data_size+= m_field_metadata_size + 3; 
8182

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  bzero(m_null_bits, num_null_bytes);
  for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
    if (m_table->field[i]->maybe_null())
      m_null_bits[(i / 8)]+= 1 << (i % 8);

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}
#endif /* !defined(MYSQL_CLIENT) */

/*
  Constructor used by slave to read the event from the binary log.
 */
#if defined(HAVE_REPLICATION)
Table_map_log_event::Table_map_log_event(const char *buf, uint event_len,
                                         const Format_description_log_event
                                         *description_event)

  : Log_event(buf, description_event),
#ifndef MYSQL_CLIENT
8201
    m_table(NULL),
8202
#endif
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    m_dbnam(NULL), m_dblen(0), m_tblnam(NULL), m_tbllen(0),
    m_colcnt(0), m_coltype(0),
    m_memory(NULL), m_table_id(ULONG_MAX), m_flags(0),
    m_data_size(0), m_field_metadata(0), m_field_metadata_size(0),
    m_null_bits(0), m_meta_memory(NULL)
8208
{
8209
  unsigned int bytes_read= 0;
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  DBUG_ENTER("Table_map_log_event::Table_map_log_event(const char*,uint,...)");

  uint8 common_header_len= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[TABLE_MAP_EVENT-1];
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  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
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                     event_len, common_header_len, post_header_len));

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  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
8222
  DBUG_DUMP("event buffer", (uchar*) buf, event_len);
8223
#endif
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  /* Read the post-header */
  const char *post_start= buf + common_header_len;

  post_start+= TM_MAPID_OFFSET;
  if (post_header_len == 6)
  {
    /* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
    m_table_id= uint4korr(post_start);
    post_start+= 4;
  }
  else
  {
    DBUG_ASSERT(post_header_len == TABLE_MAP_HEADER_LEN);
8238
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= TM_FLAGS_OFFSET;
  }

8242
  DBUG_ASSERT(m_table_id != ~0UL);
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  m_flags= uint2korr(post_start);

  /* Read the variable part of the event */
  const char *const vpart= buf + common_header_len + post_header_len;

  /* Extract the length of the various parts from the buffer */
8250
  uchar const *const ptr_dblen= (uchar const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
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  /* Length of database name + counter + terminating null */
8254
  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
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  /* Length of table name + counter + terminating null */
8258
  uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
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  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
8261

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8262
  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
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                     (ulong) m_dblen, (long) (ptr_dblen-(const uchar*)vpart), 
                     (ulong) m_tbllen, (long) (ptr_tbllen-(const uchar*)vpart),
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                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
8266

8267
  /* Allocate mem for all fields in one go. If fails, caught in is_valid() */
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  m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                     &m_dbnam, (uint) m_dblen + 1,
                                     &m_tblnam, (uint) m_tbllen + 1,
                                     &m_coltype, (uint) m_colcnt,
                                     NullS);
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  if (m_memory)
  {
    /* Copy the different parts into their memory */
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    strncpy(const_cast<char*>(m_dbnam), (const char*)ptr_dblen  + 1, m_dblen + 1);
    strncpy(const_cast<char*>(m_tblnam), (const char*)ptr_tbllen + 1, m_tbllen + 1);
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    memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
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    ptr_after_colcnt= ptr_after_colcnt + m_colcnt;
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    bytes_read= (uint) (ptr_after_colcnt - (uchar *)buf);
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    DBUG_PRINT("info", ("Bytes read: %d.\n", bytes_read));
    if (bytes_read < event_len)
    {
      m_field_metadata_size= net_field_length(&ptr_after_colcnt);
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      DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
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      uint num_null_bytes= (m_colcnt + 7) / 8;
      m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                     &m_null_bits, num_null_bytes,
                                     &m_field_metadata, m_field_metadata_size,
                                     NULL);
      memcpy(m_field_metadata, ptr_after_colcnt, m_field_metadata_size);
      ptr_after_colcnt= (uchar*)ptr_after_colcnt + m_field_metadata_size;
      memcpy(m_null_bits, ptr_after_colcnt, num_null_bytes);
    }
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  }

  DBUG_VOID_RETURN;
}
#endif

Table_map_log_event::~Table_map_log_event()
{
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  my_free(m_meta_memory, MYF(MY_ALLOW_ZERO_PTR));
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  my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR));
}

/*
  Return value is an error code, one of:

      -1     Failure to open table   [from open_tables()]
       0     Success
       1     No room for more tables [from set_table()]
       2     Out of memory           [from set_table()]
       3     Wrong table definition
       4     Daisy-chaining RBR with SBR not possible
 */

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
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enum enum_tbl_map_status
{
  /* no duplicate identifier found */
  OK_TO_PROCESS= 0,

  /* this table map must be filtered out */
  FILTERED_OUT= 1,

  /* identifier mapping table with different properties */
  SAME_ID_MAPPING_DIFFERENT_TABLE= 2,
  
  /* a duplicate identifier was found mapping the same table */
  SAME_ID_MAPPING_SAME_TABLE= 3
};

/*
  Checks if this table map event should be processed or not. First
  it checks the filtering rules, and then looks for duplicate identifiers
  in the existing list of rli->tables_to_lock.

  It checks that there hasn't been any corruption by verifying that there
  are no duplicate entries with different properties.

  In some cases, some binary logs could get corrupted, showing several
  tables mapped to the same table_id, 0 (see: BUG#56226). Thus we do this
  early sanity check for such cases and avoid that the server crashes 
  later.

  In some corner cases, the master logs duplicate table map events, i.e.,
  same id, same database name, same table name (see: BUG#37137). This is
  different from the above as it's the same table that is mapped again 
  to the same identifier. Thus we cannot just check for same ids and 
  assume that the event is corrupted we need to check every property. 

  NOTE: in the event that BUG#37137 ever gets fixed, this extra check 
        will still be valid because we would need to support old binary 
        logs anyway.

  @param rli The relay log info reference.
  @param table_list A list element containing the table to check against.
  @return OK_TO_PROCESS 
            if there was no identifier already in rli->tables_to_lock 
            
          FILTERED_OUT
            if the event is filtered according to the filtering rules

          SAME_ID_MAPPING_DIFFERENT_TABLE 
            if the same identifier already maps a different table in 
            rli->tables_to_lock

          SAME_ID_MAPPING_SAME_TABLE 
            if the same identifier already maps the same table in 
            rli->tables_to_lock.
*/
static enum_tbl_map_status
check_table_map(Relay_log_info const *rli, RPL_TABLE_LIST *table_list)
{
  DBUG_ENTER("check_table_map");
  enum_tbl_map_status res= OK_TO_PROCESS;

  if (rli->sql_thd->slave_thread /* filtering is for slave only */ &&
      (!rpl_filter->db_ok(table_list->db) ||
       (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list))))
    res= FILTERED_OUT;
  else
  {
    for(RPL_TABLE_LIST *ptr= static_cast<RPL_TABLE_LIST*>(rli->tables_to_lock);
        ptr; 
        ptr= static_cast<RPL_TABLE_LIST*>(ptr->next_local))
    {
      if (ptr->table_id == table_list->table_id)
      {

        if (strcmp(ptr->db, table_list->db) || 
            strcmp(ptr->alias, table_list->table_name) || 
            ptr->lock_type != TL_WRITE) // the ::do_apply_event always sets TL_WRITE
          res= SAME_ID_MAPPING_DIFFERENT_TABLE;
        else
          res= SAME_ID_MAPPING_SAME_TABLE;

        break;
      }
    }
  }

  DBUG_PRINT("debug", ("check of table map ended up with: %u", res));

  DBUG_RETURN(res);
}

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int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
8413
{
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  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
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  DBUG_ENTER("Table_map_log_event::do_apply_event(Relay_log_info*)");
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  DBUG_ASSERT(rli->sql_thd == thd);

  /* Step the query id to mark what columns that are actually used. */
  pthread_mutex_lock(&LOCK_thread_count);
  thd->query_id= next_query_id();
  pthread_mutex_unlock(&LOCK_thread_count);

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  if (!(memory= my_multi_malloc(MYF(MY_WME),
                                &table_list, (uint) sizeof(RPL_TABLE_LIST),
                                &db_mem, (uint) NAME_LEN + 1,
                                &tname_mem, (uint) NAME_LEN + 1,
                                NullS)))
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    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
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  bzero(table_list, sizeof(*table_list));
  table_list->db = db_mem;
  table_list->alias= table_list->table_name = tname_mem;
  table_list->lock_type= TL_WRITE;
  table_list->next_global= table_list->next_local= 0;
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  table_list->table_id= DBUG_EVALUATE_IF("inject_tblmap_same_id_maps_diff_table", 0, m_table_id);
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  table_list->updating= 1;
  strmov(table_list->db, rpl_filter->get_rewrite_db(m_dbnam, &dummy_len));
  strmov(table_list->table_name, m_tblnam);
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  DBUG_PRINT("debug", ("table: %s is mapped to %u", table_list->table_name, table_list->table_id));
  enum_tbl_map_status tblmap_status= check_table_map(rli, table_list);
  if (tblmap_status == OK_TO_PROCESS)
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  {
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    DBUG_ASSERT(thd->lex->query_tables != table_list);
8447

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    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
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      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
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      inside Relay_log_info::clear_tables_to_lock() by calling the
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      table_def destructor explicitly.
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    */
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    new (&table_list->m_tabledef)
      table_def(m_coltype, m_colcnt,
                m_field_metadata, m_field_metadata_size,
                m_null_bits, m_flags);
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    table_list->m_tabledef_valid= TRUE;
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    table_list->skip_temporary= 1;
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    /*
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      We record in the slave's information that the table should be
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      locked by linking the table into the list of tables to lock.
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    */
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    table_list->next_global= table_list->next_local= rli->tables_to_lock;
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    const_cast<Relay_log_info*>(rli)->tables_to_lock= table_list;
    const_cast<Relay_log_info*>(rli)->tables_to_lock_count++;
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    /* 'memory' is freed in clear_tables_to_lock */
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  }
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  else  // FILTERED_OUT, SAME_ID_MAPPING_*
  {
    /*
      If mapped already but with different properties, we raise an
      error.
      If mapped already but with same properties we skip the event.
      If filtered out we skip the event.
8480

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      In all three cases, we need to free the memory previously 
      allocated.
     */
    if (tblmap_status == SAME_ID_MAPPING_DIFFERENT_TABLE)
    {
      /*
        Something bad has happened. We need to stop the slave as strange things
        could happen if we proceed: slave crash, wrong table being updated, ...
        As a consequence we push an error in this case.
       */

      char buf[256];

      my_snprintf(buf, sizeof(buf), 
                  "Found table map event mapping table id %u which "
                  "was already mapped but with different settings.",
                  table_list->table_id);

      if (thd->slave_thread)
        rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR, 
                    ER(ER_SLAVE_FATAL_ERROR), buf);
      else
        /* 
          For the cases in which a 'BINLOG' statement is set to 
          execute in a user session 
         */
        my_printf_error(ER_SLAVE_FATAL_ERROR, ER(ER_SLAVE_FATAL_ERROR), 
                        MYF(0), buf);
    } 
    
    my_free(memory, MYF(0));
  }

  DBUG_RETURN(tblmap_status == SAME_ID_MAPPING_DIFFERENT_TABLE);
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}
8516

8517
Log_event::enum_skip_reason
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Table_map_log_event::do_shall_skip(Relay_log_info *rli)
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{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
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  return continue_group(rli);
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}

8527
int Table_map_log_event::do_update_pos(Relay_log_info *rli)
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{
  rli->inc_event_relay_log_pos();
  return 0;
}

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#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
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  DBUG_ASSERT(m_table_id != ~0UL);
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  uchar buf[TABLE_MAP_HEADER_LEN];
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + TM_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + TM_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, TABLE_MAP_HEADER_LEN));
}

bool Table_map_log_event::write_data_body(IO_CACHE *file)
{
  DBUG_ASSERT(m_dbnam != NULL);
  DBUG_ASSERT(m_tblnam != NULL);
  /* We use only one byte per length for storage in event: */
  DBUG_ASSERT(m_dblen < 128);
  DBUG_ASSERT(m_tbllen < 128);

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  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
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8562
  uchar cbuf[sizeof(m_colcnt) + 1];
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  uchar *const cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
  DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
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  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
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  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
8571

8572
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
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          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
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          my_b_safe_write(file, m_coltype, m_colcnt) ||
          my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
          my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
          my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
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 }
#endif

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)

/*
  Print some useful information for the SHOW BINARY LOG information
  field.
 */

8591
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
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    size_t bytes= my_snprintf(buf, sizeof(buf),
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                                 "table_id: %lu (%s.%s)",
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                              m_table_id, m_dbnam, m_tblnam);
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    protocol->store(buf, bytes, &my_charset_bin);
}
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#endif

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#endif


#ifdef MYSQL_CLIENT
8607
void Table_map_log_event::print(FILE *, PRINT_EVENT_INFO *print_event_info)
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{
  if (!print_event_info->short_form)
  {
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    print_header(&print_event_info->head_cache, print_event_info, TRUE);
    my_b_printf(&print_event_info->head_cache,
                "\tTable_map: `%s`.`%s` mapped to number %lu\n",
                m_dbnam, m_tblnam, m_table_id);
    print_base64(&print_event_info->body_cache, print_event_info, TRUE);
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  }
}
#endif

/**************************************************************************
	Write_rows_log_event member functions
**************************************************************************/

/*
  Constructor used to build an event for writing to the binary log.
 */
#if !defined(MYSQL_CLIENT)
Write_rows_log_event::Write_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                           ulong tid_arg,
                                           MY_BITMAP const *cols,
                                           bool is_transactional)
  : Rows_log_event(thd_arg, tbl_arg, tid_arg, cols, is_transactional)
{
}
#endif

/*
  Constructor used by slave to read the event from the binary log.
 */
#ifdef HAVE_REPLICATION
Write_rows_log_event::Write_rows_log_event(const char *buf, uint event_len,
                                           const Format_description_log_event
                                           *description_event)
: Rows_log_event(buf, event_len, WRITE_ROWS_EVENT, description_event)
{
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8650 8651
int 
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
8652 8653 8654
{
  int error= 0;

8655 8656 8657
  /**
     todo: to introduce a property for the event (handler?) which forces
     applying the event in the replace (idempotent) fashion.
8658
  */
8659
  if ((slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT) ||
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      m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
  {
    /*
      We are using REPLACE semantics and not INSERT IGNORE semantics
      when writing rows, that is: new rows replace old rows.  We need to
      inform the storage engine that it should use this behaviour.
    */
    
    /* Tell the storage engine that we are using REPLACE semantics. */
    thd->lex->duplicates= DUP_REPLACE;
    
    /*
      Pretend we're executing a REPLACE command: this is needed for
      InnoDB and NDB Cluster since they are not (properly) checking the
      lex->duplicates flag.
    */
    thd->lex->sql_command= SQLCOM_REPLACE;
    /* 
       Do not raise the error flag in case of hitting to an unique attribute
    */
    m_table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
    /* 
       NDB specific: update from ndb master wrapped as Write_rows
       so that the event should be applied to replace slave's row
    */
    m_table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
    /* 
       NDB specific: if update from ndb master wrapped as Write_rows
       does not find the row it's assumed idempotent binlog applying
       is taking place; don't raise the error.
    */
    m_table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
    /*
      TODO: the cluster team (Tomas?) says that it's better if the engine knows
      how many rows are going to be inserted, then it can allocate needed memory
      from the start.
    */
  }
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  /*
    We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
    any TIMESTAMP column with data from the row but instead will use
    the event's current time.
    As we replicate from TIMESTAMP to TIMESTAMP and slave has no extra
    columns, we know that all TIMESTAMP columns on slave will receive explicit
    data from the row, so TIMESTAMP_NO_AUTO_SET is ok.
    When we allow a table without TIMESTAMP to be replicated to a table having
    more columns including a TIMESTAMP column, or when we allow a TIMESTAMP
    column to be replicated into a BIGINT column and the slave's table has a
    TIMESTAMP column, then the slave's TIMESTAMP column will take its value
    from set_time() which we called earlier (consistent with SBR). And then in
    some cases we won't want TIMESTAMP_NO_AUTO_SET (will require some code to
    analyze if explicit data is provided for slave's TIMESTAMP columns).
  */
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  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
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  /* Honor next number column if present */
  m_table->next_number_field= m_table->found_next_number_field;
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  /*
   * Fixed Bug#45999, In RBR, Store engine of Slave auto-generates new
   * sequence numbers for auto_increment fields if the values of them are 0.
   * If generateing a sequence number is decided by the values of
   * table->auto_increment_field_not_null and SQL_MODE(if includes
   * MODE_NO_AUTO_VALUE_ON_ZERO) in update_auto_increment function.
   * SQL_MODE of slave sql thread is always consistency with master's.
   * In RBR, auto_increment fields never are NULL.
   */
  m_table->auto_increment_field_not_null= TRUE;
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  return error;
}

8731
int 
8732
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
8733
                                              int error)
8734
{
8735
  int local_error= 0;
8736
  m_table->next_number_field=0;
8737
  m_table->auto_increment_field_not_null= FALSE;
8738
  if ((slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT) ||
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      m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
  {
    m_table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
    m_table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
    /*
      resetting the extra with 
      table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
      fires bug#27077
      explanation: file->reset() performs this duty
      ultimately. Still todo: fix
    */
  }
8751
  if ((local_error= m_table->file->ha_end_bulk_insert()))
8752
  {
8753
    m_table->file->print_error(local_error, MYF(0));
8754 8755
  }
  return error? error : local_error;
8756 8757
}

8758
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769 8770 8771

/*
  Check if there are more UNIQUE keys after the given key.
*/
static int
last_uniq_key(TABLE *table, uint keyno)
{
  while (++keyno < table->s->keys)
    if (table->key_info[keyno].flags & HA_NOSAME)
      return 0;
  return 1;
}

8772 8773 8774 8775 8776 8777 8778 8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796
/**
   Check if an error is a duplicate key error.

   This function is used to check if an error code is one of the
   duplicate key error, i.e., and error code for which it is sensible
   to do a <code>get_dup_key()</code> to retrieve the duplicate key.

   @param errcode The error code to check.

   @return <code>true</code> if the error code is such that
   <code>get_dup_key()</code> will return true, <code>false</code>
   otherwise.
 */
bool
is_duplicate_key_error(int errcode)
{
  switch (errcode)
  {
  case HA_ERR_FOUND_DUPP_KEY:
  case HA_ERR_FOUND_DUPP_UNIQUE:
    return true;
  }
  return false;
}

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/**
  Write the current row into event's table.
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  The row is located in the row buffer, pointed by @c m_curr_row member.
  Number of columns of the row is stored in @c m_width member (it can be 
  different from the number of columns in the table to which we insert). 
  Bitmap @c m_cols indicates which columns are present in the row. It is assumed 
  that event's table is already open and pointed by @c m_table.
8805

8806 8807 8808 8809 8810
  If the same record already exists in the table it can be either overwritten 
  or an error is reported depending on the value of @c overwrite flag 
  (error reporting not yet implemented). Note that the matching record can be
  different from the row we insert if we use primary keys to identify records in
  the table.
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8812 8813 8814 8815
  The row to be inserted can contain values only for selected columns. The 
  missing columns are filled with default values using @c prepare_record() 
  function. If a matching record is found in the table and @c overwritte is
  true, the missing columns are taken from it.
8816

8817 8818 8819 8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832
  @param  rli   Relay log info (needed for row unpacking).
  @param  overwrite  
                Shall we overwrite if the row already exists or signal 
                error (currently ignored).

  @returns Error code on failure, 0 on success.

  This method, if successful, sets @c m_curr_row_end pointer to point at the
  next row in the rows buffer. This is done when unpacking the row to be 
  inserted.

  @note If a matching record is found, it is either updated using 
  @c ha_update_row() or first deleted and then new record written.
*/ 

int
8833
Rows_log_event::write_row(const Relay_log_info *const rli,
8834
                          const bool overwrite)
8835
{
8836 8837
  DBUG_ENTER("write_row");
  DBUG_ASSERT(m_table != NULL && thd != NULL);
8838

8839
  TABLE *table= m_table;  // pointer to event's table
8840
  int error;
8841
  int UNINIT_VAR(keynum);
8842 8843
  auto_afree_ptr<char> key(NULL);

8844 8845 8846
  prepare_record(table, m_width,
                 table->file->ht->db_type != DB_TYPE_NDBCLUSTER);

8847
  /* unpack row into table->record[0] */
8848
  if ((error= unpack_current_row(rli)))
8849 8850
    DBUG_RETURN(error);

8851 8852 8853 8854 8855 8856 8857 8858 8859 8860
  if (m_curr_row == m_rows_buf)
  {
    /* this is the first row to be inserted, we estimate the rows with
       the size of the first row and use that value to initialize
       storage engine for bulk insertion */
    ulong estimated_rows= (m_rows_end - m_curr_row) / (m_curr_row_end - m_curr_row);
    m_table->file->ha_start_bulk_insert(estimated_rows);
  }
  
  
8861
#ifndef DBUG_OFF
8862
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8863 8864 8865 8866
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

8867 8868 8869 8870 8871 8872 8873 8874
  /* 
    Try to write record. If a corresponding record already exists in the table,
    we try to change it using ha_update_row() if possible. Otherwise we delete
    it and repeat the whole process again. 

    TODO: Add safety measures against infinite looping. 
   */

8875 8876
  while ((error= table->file->ha_write_row(table->record[0])))
  {
8877 8878 8879 8880
    if (error == HA_ERR_LOCK_DEADLOCK ||
        error == HA_ERR_LOCK_WAIT_TIMEOUT ||
        (keynum= table->file->get_dup_key(error)) < 0 ||
        !overwrite)
8881
    {
8882
      DBUG_PRINT("info",("get_dup_key returns %d)", keynum));
8883
      /*
8884 8885 8886
        Deadlock, waiting for lock or just an error from the handler
        such as HA_ERR_FOUND_DUPP_KEY when overwrite is false.
        Retrieval of the duplicate key number may fail
8887 8888 8889
        - either because the error was not "duplicate key" error
        - or because the information which key is not available
      */
8890
      table->file->print_error(error, MYF(0));
8891
      DBUG_RETURN(error);
8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902
    }
    /*
       We need to retrieve the old row into record[1] to be able to
       either update or delete the offending record.  We either:

       - use rnd_pos() with a row-id (available as dupp_row) to the
         offending row, if that is possible (MyISAM and Blackhole), or else

       - use index_read_idx() with the key that is duplicated, to
         retrieve the offending row.
     */
8903
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
8904
    {
8905
      DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
8906
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
8907
      if (error)
8908
      {
8909
        DBUG_PRINT("info",("rnd_pos() returns error %d",error));
8910 8911
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8912
        table->file->print_error(error, MYF(0));
8913
        DBUG_RETURN(error);
8914
      }
8915 8916 8917
    }
    else
    {
8918 8919
      DBUG_PRINT("info",("Locating offending record using index_read_idx()"));

8920 8921
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
8922
        DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
8923
        DBUG_RETURN(my_errno);
8924 8925 8926 8927 8928 8929
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
8930 8931
        {
          DBUG_PRINT("info",("Can't allocate key buffer"));
8932
          DBUG_RETURN(ENOMEM);
8933
        }
8934 8935
      }

8936 8937
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
               0);
8938 8939 8940 8941
      error= table->file->index_read_idx_map(table->record[1], keynum,
                                             (const uchar*)key.get(),
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT);
8942
      if (error)
8943
      {
8944 8945 8946
        DBUG_PRINT("info",("index_read_idx() returns %s", HA_ERR(error)));
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8947
        table->file->print_error(error, MYF(0));
8948
        DBUG_RETURN(error);
8949
      }
8950 8951 8952
    }

    /*
8953
       Now, record[1] should contain the offending row.  That
8954 8955
       will enable us to update it or, alternatively, delete it (so
       that we can insert the new row afterwards).
8956
     */
8957

8958 8959 8960
    /*
      If row is incomplete we will use the record found to fill 
      missing columns.  
8961
    */
8962 8963 8964 8965 8966 8967 8968 8969 8970 8971 8972
    if (!get_flags(COMPLETE_ROWS_F))
    {
      restore_record(table,record[1]);
      error= unpack_current_row(rli);
    }

#ifndef DBUG_OFF
    DBUG_PRINT("debug",("preparing for update: before and after image"));
    DBUG_DUMP("record[1] (before)", table->record[1], table->s->reclength);
    DBUG_DUMP("record[0] (after)", table->record[0], table->s->reclength);
#endif
8973

8974
    /*
8975 8976 8977 8978 8979 8980 8981 8982 8983 8984 8985 8986 8987 8988 8989 8990 8991
       REPLACE is defined as either INSERT or DELETE + INSERT.  If
       possible, we can replace it with an UPDATE, but that will not
       work on InnoDB if FOREIGN KEY checks are necessary.

       I (Matz) am not sure of the reason for the last_uniq_key()
       check as, but I'm guessing that it's something along the
       following lines.

       Suppose that we got the duplicate key to be a key that is not
       the last unique key for the table and we perform an update:
       then there might be another key for which the unique check will
       fail, so we're better off just deleting the row and inserting
       the correct row.
     */
    if (last_uniq_key(table, keynum) &&
        !table->file->referenced_by_foreign_key())
    {
8992
      DBUG_PRINT("info",("Updating row using ha_update_row()"));
8993 8994
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
8995 8996 8997 8998 8999
      switch (error) {
                
      case HA_ERR_RECORD_IS_THE_SAME:
        DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
                           " ha_update_row()"));
9000
        error= 0;
9001 9002 9003 9004 9005 9006
      
      case 0:
        break;
        
      default:    
        DBUG_PRINT("info",("ha_update_row() returns error %d",error));
9007
        table->file->print_error(error, MYF(0));
9008 9009
      }
      
9010
      DBUG_RETURN(error);
9011 9012 9013
    }
    else
    {
9014
      DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
9015
      if ((error= table->file->ha_delete_row(table->record[1])))
9016
      {
9017
        DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
9018
        table->file->print_error(error, MYF(0));
9019
        DBUG_RETURN(error);
9020
      }
9021 9022 9023
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
9024

9025
  DBUG_RETURN(error);
9026 9027
}

9028 9029 9030
#endif

int 
9031
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
9032
{
9033
  DBUG_ASSERT(m_table != NULL);
9034 9035
  int error= write_row(rli, (slave_exec_mode & SLAVE_EXEC_MODE_IDEMPOTENT));

9036 9037 9038 9039 9040
  if (error && !thd->is_error())
  {
    DBUG_ASSERT(0);
    my_error(ER_UNKNOWN_ERROR, MYF(0));
  }
9041
  
9042
  return error; 
9043
}
9044

9045 9046 9047 9048 9049
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
9050
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
9051 9052 9053 9054 9055 9056 9057 9058
}
#endif

/**************************************************************************
	Delete_rows_log_event member functions
**************************************************************************/

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
9059 9060 9061 9062 9063 9064
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
9065
{
9066 9067 9068 9069 9070 9071 9072 9073 9074 9075 9076 9077
  /*
    Need to set the X bit and the filler bits in both records since
    there are engines that do not set it correctly.

    In addition, since MyISAM checks that one hasn't tampered with the
    record, it is necessary to restore the old bytes into the record
    after doing the comparison.

    TODO[record format ndb]: Remove it once NDB returns correct
    records. Check that the other engines also return correct records.
   */

9078 9079 9080
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
  DBUG_DUMP("record[1]", table->record[1], table->s->reclength);

9081
  bool result= FALSE;
9082
  uchar saved_x[2]= {0, 0}, saved_filler[2]= {0, 0};
9083 9084 9085 9086 9087

  if (table->s->null_bytes > 0)
  {
    for (int i = 0 ; i < 2 ; ++i)
    {
9088 9089 9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104 9105 9106 9107 9108 9109
      /* 
        If we have an X bit then we need to take care of it.
      */
      if (!(table->s->db_options_in_use & HA_OPTION_PACK_RECORD))
      {
        saved_x[i]= table->record[i][0];
        table->record[i][0]|= 1U;
      }

      /*
         If (last_null_bit_pos == 0 && null_bytes > 1), then:

         X bit (if any) + N nullable fields + M Field_bit fields = 8 bits 

         Ie, the entire byte is used.
      */
      if (table->s->last_null_bit_pos > 0)
      {
        saved_filler[i]= table->record[i][table->s->null_bytes - 1];
        table->record[i][table->s->null_bytes - 1]|=
          256U - (1U << table->s->last_null_bit_pos);
      }
9110 9111 9112
    }
  }

9113 9114 9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125
  /**
    Compare full record only if:
    - there are no blob fields (otherwise we would also need 
      to compare blobs contents as well);
    - there are no varchar fields (otherwise we would also need
      to compare varchar contents as well);
    - there are no null fields, otherwise NULLed fields 
      contents (i.e., the don't care bytes) may show arbitrary 
      values, depending on how each engine handles internally.
    */
  if ((table->s->blob_fields + 
       table->s->varchar_fields + 
       table->s->null_fields) == 0)
9126 9127 9128 9129 9130
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

9131 9132 9133 9134
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
9135 9136 9137 9138 9139
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

9140
  /* Compare fields */
9141
  for (Field **ptr=table->field ; *ptr ; ptr++)
9142
  {
9143 9144 9145 9146 9147 9148 9149

    /**
      We only compare field contents that are not null.
      NULL fields (i.e., their null bits) were compared 
      earlier.
    */
    if (!(*(ptr))->is_null())
9150
    {
9151 9152 9153 9154 9155
      if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
      {
        result= TRUE;
        goto record_compare_exit;
      }
9156
    }
9157
  }
9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169

record_compare_exit:
  /*
    Restore the saved bytes.

    TODO[record format ndb]: Remove this code once NDB returns the
    correct record format.
  */
  if (table->s->null_bytes > 0)
  {
    for (int i = 0 ; i < 2 ; ++i)
    {
9170 9171 9172 9173 9174
      if (!(table->s->db_options_in_use & HA_OPTION_PACK_RECORD))
        table->record[i][0]= saved_x[i];

      if (table->s->last_null_bit_pos)
        table->record[i][table->s->null_bytes - 1]= saved_filler[i];
9175
    }
9176
  }
9177 9178

  return result;
9179 9180
}

9181 9182
/**
  Locate the current row in event's table.
9183

9184 9185 9186 9187
  The current row is pointed by @c m_curr_row. Member @c m_width tells how many 
  columns are there in the row (this can be differnet from the number of columns 
  in the table). It is assumed that event's table is already open and pointed 
  by @c m_table.
9188

9189 9190 9191
  If a corresponding record is found in the table it is stored in 
  @c m_table->record[0]. Note that when record is located based on a primary 
  key, it is possible that the record found differs from the row being located.
9192

9193 9194 9195 9196 9197
  If no key is specified or table does not have keys, a table scan is used to 
  find the row. In that case the row should be complete and contain values for
  all columns. However, it can still be shorter than the table, i.e. the table 
  can contain extra columns not present in the row. It is also possible that 
  the table has fewer columns than the row being located. 
9198

9199 9200 9201 9202
  @returns Error code on failure, 0 on success. 
  
  @post In case of success @c m_table->record[0] contains the record found. 
  Also, the internal "cursor" of the table is positioned at the record found.
9203

9204 9205
  @note If the engine allows random access of the records, a combination of
  @c position() and @c rnd_pos() will be used. 
9206
 */
9207

9208
int Rows_log_event::find_row(const Relay_log_info *rli)
9209
{
9210
  DBUG_ENTER("Rows_log_event::find_row");
9211 9212

  DBUG_ASSERT(m_table && m_table->in_use != NULL);
9213

9214
  TABLE *table= m_table;
9215
  int error= 0;
9216

9217 9218 9219 9220 9221 9222 9223 9224 9225
  /*
    rpl_row_tabledefs.test specifies that
    if the extra field on the slave does not have a default value
    and this is okay with Delete or Update events.
    Todo: fix wl3228 hld that requires defauls for all types of events
  */
  
  prepare_record(table, m_width, FALSE);
  error= unpack_current_row(rli);
9226

9227 9228
#ifndef DBUG_OFF
  DBUG_PRINT("info",("looking for the following record"));
9229
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
9230
#endif
9231

9232 9233
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
9234 9235 9236 9237 9238 9239
  {
    /*
      Use a more efficient method to fetch the record given by
      table->record[0] if the engine allows it.  We first compute a
      row reference using the position() member function (it will be
      stored in table->file->ref) and the use rnd_pos() to position
9240
      the "cursor" (i.e., record[0] in this case) at the correct row.
9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251

      TODO: Add a check that the correct record has been fetched by
      comparing with the original record. Take into account that the
      record on the master and slave can be of different
      length. Something along these lines should work:

      ADD>>>  store_record(table,record[1]);
              int error= table->file->rnd_pos(table->record[0], table->file->ref);
      ADD>>>  DBUG_ASSERT(memcmp(table->record[1], table->record[0],
                                 table->s->reclength) == 0);

9252
    */
9253
    DBUG_PRINT("info",("locating record using primary key (position)"));
9254
    int error= table->file->rnd_pos_by_record(table->record[0]);
9255 9256 9257
    if (error)
    {
      DBUG_PRINT("info",("rnd_pos returns error %d",error));
9258 9259
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
9260 9261
      table->file->print_error(error, MYF(0));
    }
9262
    DBUG_RETURN(error);
9263 9264
  }

9265
  // We can't use position() - try other methods.
9266 9267 9268 9269 9270
  
  /* 
    We need to retrieve all fields
    TODO: Move this out from this function to main loop 
   */
9271
  table->use_all_columns();
unknown's avatar
unknown committed
9272

9273 9274 9275 9276 9277 9278
  /*
    Save copy of the record in table->record[1]. It might be needed 
    later if linear search is used to find exact match.
   */ 
  store_record(table,record[1]);    

9279
  if (table->s->keys > 0 && table->s->keys_in_use.is_set(0))
9280
  {
9281 9282
    DBUG_PRINT("info",("locating record using primary key (index_read)"));

9283
    /* The 0th key is active: search the table using the index */
9284
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
9285 9286 9287
    {
      DBUG_PRINT("info",("ha_index_init returns error %d",error));
      table->file->print_error(error, MYF(0));
9288
      goto err;
9289
    }
9290

9291 9292 9293 9294 9295 9296 9297 9298 9299
    /* Fill key data for the row */

    DBUG_ASSERT(m_key);
    key_copy(m_key, table->record[0], table->key_info, 0);

    /*
      Don't print debug messages when running valgrind since they can
      trigger false warnings.
     */
9300
#ifndef HAVE_purify
9301
    DBUG_DUMP("key data", m_key, table->key_info->key_length);
9302 9303
#endif

9304 9305 9306 9307 9308 9309
    /*
      We need to set the null bytes to ensure that the filler bit are
      all set when returning.  There are storage engines that just set
      the necessary bits on the bytes and don't set the filler bits
      correctly.
    */
9310 9311 9312 9313
    if (table->s->null_bytes > 0)
      table->record[0][table->s->null_bytes - 1]|=
        256U - (1U << table->s->last_null_bit_pos);

9314
    if ((error= table->file->index_read_map(table->record[0], m_key, 
9315
                                            HA_WHOLE_KEY,
9316
                                            HA_READ_KEY_EXACT)))
9317
    {
9318
      DBUG_PRINT("info",("no record matching the key found in the table"));
9319 9320
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
9321
      table->file->print_error(error, MYF(0));
9322
      table->file->ha_index_end();
9323
      goto err;
9324 9325
    }

9326 9327 9328 9329 9330
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
9331 9332
    DBUG_PRINT("info",("found first matching record")); 
    DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
9333
#endif
9334 9335 9336 9337 9338 9339 9340 9341 9342 9343 9344 9345 9346
    /*
      Below is a minor "optimization".  If the key (i.e., key number
      0) has the HA_NOSAME flag set, we know that we have found the
      correct record (since there can be no duplicates); otherwise, we
      have to compare the record with the one found to see if it is
      the correct one.

      CAVEAT! This behaviour is essential for the replication of,
      e.g., the mysql.proc table since the correct record *shall* be
      found using the primary key *only*.  There shall be no
      comparison of non-PK columns to decide if the correct record is
      found.  I can see no scenario where it would be incorrect to
      chose the row to change only using a PK or an UNNI.
9347
    */
9348
    if (table->key_info->flags & HA_NOSAME)
9349
    {
9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363
      /* Unique does not have non nullable part */
      if (!(table->key_info->flags & (HA_NULL_PART_KEY)))
      {
        table->file->ha_index_end();
        goto ok;
      }
      else
      {
        KEY *keyinfo= table->key_info;
        /*
          Unique has nullable part. We need to check if there is any field in the
          BI image that is null and part of UNNI.
        */
        bool null_found= FALSE;
9364
        for (uint i=0; i < keyinfo->key_parts && !null_found; i++)
9365
        {
9366
          uint fieldnr= keyinfo->key_part[i].fieldnr - 1;
9367
          Field **f= table->field+fieldnr;
9368
          null_found= (*f)->is_null();
9369 9370 9371 9372 9373 9374 9375 9376 9377 9378
        }

        if (!null_found)
        {
          table->file->ha_index_end();
          goto ok;
        }

        /* else fall through to index scan */
      }
9379
    }
9380

9381 9382
    /*
      In case key is not unique, we still have to iterate over records found
9383 9384
      and find the one which is identical to the row given. A copy of the 
      record we are looking for is stored in record[1].
9385 9386 9387
     */ 
    DBUG_PRINT("info",("non-unique index, scanning it to find matching record")); 

9388
    while (record_compare(table))
9389
    {
9390 9391 9392 9393 9394
      /*
        We need to set the null bytes to ensure that the filler bit
        are all set when returning.  There are storage engines that
        just set the necessary bits on the bytes and don't set the
        filler bits correctly.
9395 9396 9397

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
9398
      */
9399 9400
      if (table->s->null_bytes > 0)
      {
9401
        table->record[0][table->s->null_bytes - 1]|=
9402 9403 9404
          256U - (1U << table->s->last_null_bit_pos);
      }

9405
      while ((error= table->file->index_next(table->record[0])))
9406
      {
9407 9408 9409
        /* We just skip records that has already been deleted */
        if (error == HA_ERR_RECORD_DELETED)
          continue;
9410 9411
        DBUG_PRINT("info",("no record matching the given row found"));
        table->file->print_error(error, MYF(0));
9412
        table->file->ha_index_end();
9413
        goto err;
9414 9415
      }
    }
9416 9417 9418 9419 9420

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
9421 9422 9423
  }
  else
  {
9424 9425
    DBUG_PRINT("info",("locating record using table scan (rnd_next)"));

9426
    int restart_count= 0; // Number of times scanning has restarted from top
9427 9428 9429

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
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    {
      DBUG_PRINT("info",("error initializing table scan"
                         " (ha_rnd_init returns %d)",error));
      table->file->print_error(error, MYF(0));
9434
      goto err;
9435
    }
9436 9437

    /* Continue until we find the right record or have made a full loop */
9438 9439
    do
    {
9440
  restart_rnd_next:
9441
      error= table->file->rnd_next(table->record[0]);
9442

9443 9444
      if (error)
        DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
9445
      switch (error) {
9446

9447
      case 0:
9448
        break;
9449

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      /*
        If the record was deleted, we pick the next one without doing
        any comparisons.
      */
      case HA_ERR_RECORD_DELETED:
        goto restart_rnd_next;

9457
      case HA_ERR_END_OF_FILE:
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        if (++restart_count < 2)
          table->file->ha_rnd_init(1);
        break;
9461 9462

      default:
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        DBUG_PRINT("info", ("Failed to get next record"
                            " (rnd_next returns %d)",error));
        table->file->print_error(error, MYF(0));
9466
        table->file->ha_rnd_end();
9467
        goto err;
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      }
    }
9470
    while (restart_count < 2 && record_compare(table));
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    /* 
      Note: above record_compare will take into accout all record fields 
      which might be incorrect in case a partial row was given in the event
     */
9476

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    /*
      Have to restart the scan to be able to fetch the next row.
    */
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    if (restart_count == 2)
      DBUG_PRINT("info", ("Record not found"));
9482 9483
    else
      DBUG_DUMP("record found", table->record[0], table->s->reclength);
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    table->file->ha_rnd_end();

9486
    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
9487
    goto err;
9488
  }
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ok:
  table->default_column_bitmaps();
9491
  DBUG_RETURN(0);
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err:
  table->default_column_bitmaps();
  DBUG_RETURN(error);
9496
}
9497

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#endif

/*
  Constructor used to build an event for writing to the binary log.
 */

#ifndef MYSQL_CLIENT
Delete_rows_log_event::Delete_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                             ulong tid, MY_BITMAP const *cols,
                                             bool is_transactional)
  : Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
}
#endif /* #if !defined(MYSQL_CLIENT) */

/*
  Constructor used by slave to read the event from the binary log.
 */
#ifdef HAVE_REPLICATION
Delete_rows_log_event::Delete_rows_log_event(const char *buf, uint event_len,
                                             const Format_description_log_event
                                             *description_event)
  : Rows_log_event(buf, event_len, DELETE_ROWS_EVENT, description_event)
{
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)

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int 
Delete_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if ((m_table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      m_table->s->primary_key < MAX_KEY)
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  {
    /*
9534
      We don't need to allocate any memory for m_key since it is not used.
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    */
    return 0;
  }

9539
  if (m_table->s->keys > 0)
9540
  {
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    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
9545
  }
9546
  return 0;
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}

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int 
Delete_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
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{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
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  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR));
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  m_key= NULL;
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  return error;
}

9561
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
9562
{
9563
  int error;
9564
  DBUG_ASSERT(m_table != NULL);
9565

9566
  if (!(error= find_row(rli))) 
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  { 
    /*
9569
      Delete the record found, located in record[0]
9570
    */
9571
    error= m_table->file->ha_delete_row(m_table->record[0]);
9572
  }
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  return error;
}

#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Delete_rows_log_event::print(FILE *file,
                                  PRINT_EVENT_INFO* print_event_info)
{
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  Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
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}
#endif


/**************************************************************************
	Update_rows_log_event member functions
**************************************************************************/

/*
  Constructor used to build an event for writing to the binary log.
 */
#if !defined(MYSQL_CLIENT)
Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
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                                             ulong tid,
                                             MY_BITMAP const *cols_bi,
                                             MY_BITMAP const *cols_ai,
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols_bi, is_transactional)
{
  init(cols_ai);
}

Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                             ulong tid,
                                             MY_BITMAP const *cols,
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                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
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  init(cols);
}

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
9616
  /* if bitmap_init fails, caught in is_valid() */
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  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
9619
                          m_width,
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                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
9624
    {
9625
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
9626 9627
      create_last_word_mask(&m_cols_ai);
    }
9628
  }
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}
#endif /* !defined(MYSQL_CLIENT) */

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Update_rows_log_event::~Update_rows_log_event()
{
  if (m_cols_ai.bitmap == m_bitbuf_ai) // no my_malloc happened
    m_cols_ai.bitmap= 0; // so no my_free in bitmap_free
  bitmap_free(&m_cols_ai); // To pair with bitmap_init().
}


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/*
  Constructor used by slave to read the event from the binary log.
 */
#ifdef HAVE_REPLICATION
Update_rows_log_event::Update_rows_log_event(const char *buf, uint event_len,
                                             const
                                             Format_description_log_event
                                             *description_event)
  : Rows_log_event(buf, event_len, UPDATE_ROWS_EVENT, description_event)
{
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)

9656 9657 9658 9659
int 
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if (m_table->s->keys > 0)
9660
  {
9661 9662 9663 9664
    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
9665 9666
  }

9667
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
9668

9669
  return 0;
9670 9671
}

9672 9673 9674
int 
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
9675 9676
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
9677 9678
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
9679
  m_key= NULL;
9680 9681 9682 9683

  return error;
}

9684
int 
9685
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
9686
{
9687
  DBUG_ASSERT(m_table != NULL);
9688

9689 9690
  int error= find_row(rli); 
  if (error)
9691 9692 9693 9694 9695 9696 9697
  {
    /*
      We need to read the second image in the event of error to be
      able to skip to the next pair of updates
    */
    m_curr_row= m_curr_row_end;
    unpack_current_row(rli);
9698
    return error;
9699
  }
9700

9701
  /*
9702
    This is the situation after locating BI:
9703

9704 9705 9706
    ===|=== before image ====|=== after image ===|===
       ^                     ^
       m_curr_row            m_curr_row_end
9707

9708 9709 9710
    BI found in the table is stored in record[0]. We copy it to record[1]
    and unpack AI to record[0].
   */
9711

9712
  store_record(m_table,record[1]);
9713

9714
  m_curr_row= m_curr_row_end;
9715
  /* this also updates m_curr_row_end */
9716
  if ((error= unpack_current_row(rli)))
9717
    return error;
9718

9719
  /*
9720
    Now we have the right row to update.  The old row (the one we're
9721
    looking for) is in record[1] and the new row is in record[0].
9722
  */
9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733
#ifndef HAVE_purify
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
  DBUG_PRINT("info",("Updating row in table"));
  DBUG_DUMP("old record", m_table->record[1], m_table->s->reclength);
  DBUG_DUMP("new values", m_table->record[0], m_table->s->reclength);
#endif

  error= m_table->file->ha_update_row(m_table->record[1], m_table->record[0]);
9734 9735
  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 0;
9736 9737 9738

  return error;
}
9739

9740 9741 9742 9743 9744 9745
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
9746
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
9747 9748 9749
}
#endif

9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763

Incident_log_event::Incident_log_event(const char *buf, uint event_len,
                                       const Format_description_log_event *descr_event)
  : Log_event(buf, descr_event)
{
  DBUG_ENTER("Incident_log_event::Incident_log_event");
  uint8 const common_header_len=
    descr_event->common_header_len;
  uint8 const post_header_len=
    descr_event->post_header_len[INCIDENT_EVENT-1];

  DBUG_PRINT("info",("event_len: %u; common_header_len: %d; post_header_len: %d",
                     event_len, common_header_len, post_header_len));

9764 9765 9766 9767 9768 9769 9770
  int incident_number= uint2korr(buf + common_header_len);
  if (incident_number >= INCIDENT_COUNT ||
      incident_number <= INCIDENT_NONE)
  {
    // If the incident is not recognized, this binlog event is
    // invalid.  If we set incident_number to INCIDENT_NONE, the
    // invalidity will be detected by is_valid().
9771
    m_incident= INCIDENT_NONE;
9772 9773 9774
    DBUG_VOID_RETURN;
  }
  m_incident= static_cast<Incident>(incident_number);
9775 9776
  char const *ptr= buf + common_header_len + post_header_len;
  char const *const str_end= buf + event_len;
unknown's avatar
unknown committed
9777 9778
  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789 9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809
  read_str(&ptr, str_end, &str, &len);
  m_message.str= const_cast<char*>(str);
  m_message.length= len;
  DBUG_PRINT("info", ("m_incident: %d", m_incident));
  DBUG_VOID_RETURN;
}


Incident_log_event::~Incident_log_event()
{
}


const char *
Incident_log_event::description() const
{
  static const char *const description[]= {
    "NOTHING",                                  // Not used
    "LOST_EVENTS"
  };

  DBUG_PRINT("info", ("m_incident: %d", m_incident));

  return description[m_incident];
}


#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
9810
  size_t bytes;
9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831
  if (m_message.length > 0)
    bytes= my_snprintf(buf, sizeof(buf), "#%d (%s)",
                       m_incident, description());
  else
    bytes= my_snprintf(buf, sizeof(buf), "#%d (%s): %s",
                       m_incident, description(), m_message.str);
  protocol->store(buf, bytes, &my_charset_bin);
}
#endif


#ifdef MYSQL_CLIENT
void
Incident_log_event::print(FILE *file,
                          PRINT_EVENT_INFO *print_event_info)
{
  if (print_event_info->short_form)
    return;

  Write_on_release_cache cache(&print_event_info->head_cache, file);
  print_header(&cache, print_event_info, FALSE);
9832
  my_b_printf(&cache, "\n# Incident: %s\nRELOAD DATABASE; # Shall generate syntax error\n", description());
9833 9834 9835 9836 9837
}
#endif

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int
9838
Incident_log_event::do_apply_event(Relay_log_info const *rli)
9839
{
9840
  DBUG_ENTER("Incident_log_event::do_apply_event");
9841 9842 9843 9844
  rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
              ER(ER_SLAVE_INCIDENT),
              description(),
              m_message.length > 0 ? m_message.str : "<none>");
9845 9846 9847 9848 9849 9850 9851 9852 9853
  DBUG_RETURN(1);
}
#endif

bool
Incident_log_event::write_data_header(IO_CACHE *file)
{
  DBUG_ENTER("Incident_log_event::write_data_header");
  DBUG_PRINT("enter", ("m_incident: %d", m_incident));
9854
  uchar buf[sizeof(int16)];
9855 9856 9857 9858 9859 9860 9861 9862
  int2store(buf, (int16) m_incident);
  DBUG_RETURN(my_b_safe_write(file, buf, sizeof(buf)));
}

bool
Incident_log_event::write_data_body(IO_CACHE *file)
{
  DBUG_ENTER("Incident_log_event::write_data_body");
9863
  DBUG_RETURN(write_str(file, m_message.str, (uint) m_message.length));
9864
}
9865 9866 9867 9868 9869 9870 9871 9872 9873


#ifdef MYSQL_CLIENT
/**
  The default values for these variables should be values that are
  *incorrect*, i.e., values that cannot occur in an event.  This way,
  they will always be printed for the first event.
*/
st_print_event_info::st_print_event_info()
9874
  :flags2_inited(0), sql_mode_inited(0), sql_mode(0),
9875 9876 9877 9878 9879 9880 9881 9882 9883 9884 9885 9886 9887 9888 9889 9890 9891 9892 9893 9894 9895
   auto_increment_increment(0),auto_increment_offset(0), charset_inited(0),
   lc_time_names_number(~0),
   charset_database_number(ILLEGAL_CHARSET_INFO_NUMBER),
   thread_id(0), thread_id_printed(false),
   base64_output_mode(BASE64_OUTPUT_UNSPEC), printed_fd_event(FALSE)
{
  /*
    Currently we only use static PRINT_EVENT_INFO objects, so zeroed at
    program's startup, but these explicit bzero() is for the day someone
    creates dynamic instances.
  */
  bzero(db, sizeof(db));
  bzero(charset, sizeof(charset));
  bzero(time_zone_str, sizeof(time_zone_str));
  delimiter[0]= ';';
  delimiter[1]= 0;
  myf const flags = MYF(MY_WME | MY_NABP);
  open_cached_file(&head_cache, NULL, NULL, 0, flags);
  open_cached_file(&body_cache, NULL, NULL, 0, flags);
}
#endif