log_event.cc 294 KB
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/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.
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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
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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)
{
  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 0;
}

/**
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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_ERR(ha_error);
  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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  rli->report(level, thd->is_error()? thd->main_da.sql_errno() : 0,
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              "Could not execute %s event on table %s.%s;"
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              "%s handler error %s; "
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              "the event's master log %s, end_log_pos %lu",
              type, table->s->db.str,
              table->s->table_name.str,
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              buff,
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              handler_error == NULL? "<unknown>" : handler_error,
              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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/**
  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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#endif
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/*
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  pretty_print_str()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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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(MY_WME))))
    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
append_query_string(CHARSET_INFO *csinfo,
                    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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    ptr+= escape_string_for_mysql(csinfo, ptr, 0,
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                                  from->ptr(), from->length());
    *ptr++='\'';
  }
  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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*/
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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,
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			      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");
883

884
  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;
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  }
900
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
901
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
903
  {
904
    DBUG_PRINT("error",("data_len: %ld", data_len));
905
    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)
  {
920
    /* 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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    }
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  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
944
  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
952
#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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#ifndef MYSQL_CLIENT
/**
  @note
959
    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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984
  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))
987
  {
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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;
991
    /*
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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.
995
    */
996
    DBUG_RETURN(0);
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  }
998
  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 ? thd->variables.max_allowed_packet : ~(ulong)0;
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#endif
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1007
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

1013
  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
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  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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  }
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  buf[data_len] = 0;
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  memcpy(buf, head, header_size);
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  if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
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  if ((res= read_log_event(buf, data_len, &error, description_event)))
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    res->register_temp_buf(buf);
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1035
err:
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  UNLOCK_MUTEX;
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  if (!res)
1038
  {
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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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  }
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  DBUG_RETURN(res);
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}

1057

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/**
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
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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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{
1067 1068
  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);

1073
  /* 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
1080
  }
1081

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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) */
      ev = new Slave_log_event(buf, event_len);
      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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    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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  */
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  if (!ev || !ev->is_valid())
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  {
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    DBUG_PRINT("error",("Found invalid event in binary log"));

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    delete ev;
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#ifdef MYSQL_CLIENT
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    if (!force_opt) /* then mysqlbinlog dies */
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    {
      *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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}

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#ifdef MYSQL_CLIENT
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/*
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  Log_event::print_header()
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*/
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void Log_event::print_header(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool is_more __attribute__((unused)))
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{
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  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));
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  /* mysqlbinlog --hexdump */
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  if (print_event_info->hexdump_from)
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  {
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    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");
      int const bytes_written=
        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]);
      DBUG_ASSERT(bytes_written >= 0);
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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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      *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];
        int const bytes_written=
          my_snprintf(emit_buf, sizeof(emit_buf),
                      "# %8.8lx %-48.48s |%16s|\n",
                      (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                      hex_string, char_string);
        DBUG_ASSERT(bytes_written >= 0);
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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;
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      }
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      else if (i % 8 == 7) *h++ = ' ';
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    }
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    *c= '\0';
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    if (hex_string[0])
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    {
      char emit_buf[256];
      int const bytes_written=
        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);
      DBUG_ASSERT(bytes_written >= 0);
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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().
    */
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    my_b_write(file, reinterpret_cast<const uchar*>("# "), 2);
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  }
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  DBUG_VOID_RETURN;
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}

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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;
      pos+= my_sprintf(buff, (buff, "%s", dec.sign() ? "-" : ""));
      end= ROUND_UP(dec.frac) + ROUND_UP(dec.intg)-1;
      for (i=0; i < end; i++)
        pos+= my_sprintf(pos, (pos, "%09d.", dec.buf[i]));
      pos+= my_sprintf(pos, (pos, "%09d", dec.buf[i]));
      my_b_printf(file, "%s", buff);
      my_snprintf(typestr, typestr_length, "DECIMAL(%d,%d)",
                  precision, decimals);
      return bin_size;
    }
    
  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;
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      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:
    {
      uint d, t;
      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;
  char typestr[64]= "";
  
  value+= (m_width + 7) / 8;
  
  my_b_printf(file, "%s", prefix);
  
  for (size_t i= 0; i < td->size(); i ++)
  {
    int is_null= (null_bits[i / 8] >> (i % 8))  & 0x01;

    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");
  }
  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)
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{
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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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/*
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  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
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  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)
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      && db && db_len)
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  {
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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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  }
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  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(char **dst, const char *src,
                                        int len, uint code)
{
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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.
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    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((char **)(&start),
                                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);
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    write_str_with_code_and_len((char **)(&start),
                                time_zone_str, time_zone_len, Q_TIME_ZONE_CODE);
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  }
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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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  /*
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    NOTE: When adding new status vars, please don't forget to update
    the MAX_SIZE_LOG_EVENT_STATUS in log_event.h and update function
    code_name in this file.
   
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    Here there could be code like
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    if (command-line-option-which-says-"log_this_variable" && inited)
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    {
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    *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);
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  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) ||
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          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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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
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      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
      killed_status_arg - an optional with default to THD::KILLED_NO_VALUE
                          if the value is different from the default, the arg
                          is set to the current thd->killed value.
                          A caller might need to masquerade thd->killed with
                          THD::NOT_KILLED.
  DESCRIPTION
  Creates an event for binlogging
  The value for local `killed_status' can be supplied by caller.
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*/
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Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
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				 ulong query_length, bool using_trans,
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				 bool suppress_use,
                                 THD::killed_state killed_status_arg)
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  :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),
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	     using_trans),
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   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
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   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 */
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   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),
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   lc_time_names_number(thd_arg->variables.lc_time_names->number),
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   charset_database_number(0),
   table_map_for_update((ulonglong)thd_arg->table_map_for_update)
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{
  time_t end_time;
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  if (killed_status_arg == THD::KILLED_NO_VALUE)
    killed_status_arg= thd_arg->killed;
  error_code=
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    (killed_status_arg == THD::NOT_KILLED) ?
    (thd_arg->is_error() ? thd_arg->main_da.sql_errno() : 0) :
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    ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ? 0 :
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     thd_arg->killed_errno());
2298
  
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  time(&end_time);
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  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
  */
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  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
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  /* 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;
  
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  /*
    If we don't use flags2 for anything else than options contained in
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    thd_arg->options, it would be more efficient to flags2=thd_arg->options
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    (OPTIONS_WRITTEN_TO_BIN_LOG would be used only at reading time).
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    But it's likely that we don't want to use 32 bits for 3 bits; in the future
    we will probably want to reclaim the 29 bits. So we need the &.
  */
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  flags2= (uint32) (thd_arg->options & OPTIONS_WRITTEN_TO_BIN_LOG);
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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));
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}
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#endif /* MYSQL_CLIENT */
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/* 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>.
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*/
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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)
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{
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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)
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      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;
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}

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static void copy_str_and_move(const char **src, 
                              Log_event::Byte **dst, 
                              uint len)
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{
  memcpy(*dst, *src, len);
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  *src= (const char *)*dst;
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  (*dst)+= len;
  *(*dst)++= 0;
}

2400

2401
#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";
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  case Q_TABLE_MAP_FOR_UPDATE_CODE: return "Q_TABLE_MAP_FOR_UPDATE_CODE";
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  }
  sprintf(buf, "CODE#%d", code);
  return buf;
}
2421
#endif
2422

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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.
 */
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#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;                               \
    }                                                 \
2439 2440
  } while (0)

2441

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/**
2443
  This is used by the SQL slave thread to prepare the event before execution.
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*/
2445
Query_log_event::Query_log_event(const char* buf, uint event_len,
2446 2447
                                 const Format_description_log_event
                                 *description_event,
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                                 Log_event_type event_type)
2449
  :Log_event(buf, description_event), data_buf(0), query(NullS),
2450
   db(NullS), catalog_len(0), status_vars_len(0),
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   flags2_inited(0), sql_mode_inited(0), charset_inited(0),
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   auto_increment_increment(1), auto_increment_offset(1),
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   time_zone_len(0), lc_time_names_number(0), charset_database_number(0),
   table_map_for_update(0)
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{
  ulong data_len;
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  uint32 tmp;
  uint8 common_header_len, post_header_len;
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  Log_event::Byte *start;
  const Log_event::Byte *end;
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  bool catalog_nz= 1;
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  DBUG_ENTER("Query_log_event::Query_log_event(char*,...)");

  common_header_len= description_event->common_header_len;
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  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",
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                     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);
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  db_len = (uint)buf[Q_DB_LEN_OFFSET]; // TODO: add a check of all *_len vars
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  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)
2491
  {
2492
    status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
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    /*
      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.
    */
2499
    if (status_vars_len > min(data_len, MAX_SIZE_LOG_EVENT_STATUS))
2500
    {
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      DBUG_PRINT("info", ("status_vars_len (%u) > data_len (%lu); query= 0",
2502
                          status_vars_len, data_len));
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      query= 0;
      DBUG_VOID_RETURN;
    }
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    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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  }
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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  */
  
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  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;)
2522
  {
2523 2524
    switch (*pos++) {
    case Q_FLAGS2_CODE:
2525
      CHECK_SPACE(pos, end, 4);
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      flags2_inited= 1;
      flags2= uint4korr(pos);
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      DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", (ulong) flags2));
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      pos+= 4;
      break;
    case Q_SQL_MODE_CODE:
    {
#ifndef DBUG_OFF
      char buff[22];
#endif
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      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;
    }
2544
    case Q_CATALOG_NZ_CODE:
2545
      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))
      {
2549
        DBUG_PRINT("info", ("query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
2553 2554
      break;
    case Q_AUTO_INCREMENT:
2555
      CHECK_SPACE(pos, end, 4);
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      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
2560 2561
    case Q_CHARSET_CODE:
    {
2562
      CHECK_SPACE(pos, end, 6);
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      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
2568 2569
    case Q_TIME_ZONE_CODE:
    {
2570 2571
      if (get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len, end))
      {
2572
        DBUG_PRINT("info", ("Q_TIME_ZONE_CODE: query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
2576 2577
      break;
    }
2578
    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
2579
      CHECK_SPACE(pos, end, 1);
2580 2581
      if ((catalog_len= *pos))
        catalog= (char*) pos+1;                           // Will be copied later
2582
      CHECK_SPACE(pos, end, catalog_len + 2);
2583 2584 2585
      pos+= catalog_len+2; // leap over end 0
      catalog_nz= 0; // catalog has end 0 in event
      break;
2586
    case Q_LC_TIME_NAMES_CODE:
2587
      CHECK_SPACE(pos, end, 2);
2588 2589 2590
      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
2591
    case Q_CHARSET_DATABASE_CODE:
2592
      CHECK_SPACE(pos, end, 2);
2593 2594 2595
      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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    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)));
2605
      pos= (const uchar*) end;                         // Break loop
2606
    }
2607
  }
2608
  
2609
#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 +
                                              data_len + 1 +
                                              QUERY_CACHE_FLAGS_SIZE +
                                              db_len + 1,
                                              MYF(MY_WME))))
2616
#else
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  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
                                             time_zone_len + 1 +
                                             data_len + 1,
                                             MYF(MY_WME))))
2621
#endif
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      DBUG_VOID_RETURN;
2623
  if (catalog_len)                                  // If catalog is given
2624
  {
2625 2626 2627 2628 2629
    /**
      @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
    */
2630
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
2631
      copy_str_and_move(&catalog, &start, catalog_len);
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    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
2635
      catalog= (const char *)start;
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      start+= catalog_len+1;
    }
2638
  }
2639
  if (time_zone_len)
2640
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
2641

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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
  */

2649
  /* A 2nd variable part; this is common to all versions */ 
2650
  memcpy((char*) start, end, data_len);          // Copy db and query
2651
  start[data_len]= '\0';              // End query with \0 (For safetly)
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  db= (char *)start;
  query= (char *)(start + db_len + 1);
2654 2655
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

2658

2659
#ifdef MYSQL_CLIENT
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/**
  Query_log_event::print().

  @todo
    print the catalog ??
*/
2666
void Query_log_event::print_query_header(IO_CACHE* file,
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					 PRINT_EVENT_INFO* print_event_info)
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{
2669
  // TODO: print the catalog ??
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  char buff[40],*end;				// Enough for SET TIMESTAMP
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  bool different_db= 1;
  uint32 tmp;

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  if (!print_event_info->short_form)
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  {
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    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) && db)
2683
  {
2684
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)))
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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);
2688
  }
2689

2690
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
2691
  end= strmov(end, print_event_info->delimiter);
2692
  *end++='\n';
2693
  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",
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                short_form ? 999999999 : (ulong)thread_id,
                print_event_info->delimiter);
    print_event_info->thread_id= thread_id;
    print_event_info->thread_id_printed= 1;
  }
2705

2706
  /*
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    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).
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  */
  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)) 
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      /* All bits which have changed */
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      tmp= (print_event_info->flags2) ^ flags2;
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    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;
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      my_b_printf(file, "SET ");
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      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
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                       "@@session.foreign_key_checks", &need_comma);
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      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
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                       "@@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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    }
  }

  /*
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    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.
2751 2752
  */

2753 2754 2755
  if (likely(sql_mode_inited) &&
      (unlikely(print_event_info->sql_mode != sql_mode ||
                !print_event_info->sql_mode_inited)))
2756
  {
2757 2758 2759 2760
    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;
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  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
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  {
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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;
2770 2771
  }

2772 2773
  /* TODO: print the catalog when we feature SET CATALOG */

2774 2775 2776
  if (likely(charset_inited) &&
      (unlikely(!print_event_info->charset_inited ||
                bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6))))
2777
  {
2778 2779
    CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
    if (cs_info)
2780
    {
2781 2782 2783
      /* for mysql client */
      my_b_printf(file, "/*!\\C %s */%s\n",
                  cs_info->csname, print_event_info->delimiter);
2784
    }
2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795
    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;
2796
  }
2797 2798
  if (time_zone_len)
  {
2799 2800
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
2801
    {
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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);
2805 2806
    }
  }
2807 2808
  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);
2811 2812
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
2813 2814 2815
  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);
2818
    else
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      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
2821 2822
    print_event_info->charset_database_number= charset_database_number;
  }
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}

2825

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void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
2828 2829 2830
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
2831
  my_b_write(&cache, (uchar*) query, q_len);
2832
  my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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}
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#endif /* MYSQL_CLIENT */
2835

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/*
2838
  Query_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2842

2843
int Query_log_event::do_apply_event(Relay_log_info const *rli)
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{
2845
  return do_apply_event(rli, query, q_len);
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}


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2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
/**
  @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...
*/
2866
int Query_log_event::do_apply_event(Relay_log_info const *rli,
2867
                                      const char *query_arg, uint32 q_len_arg)
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2868
{
2869
  LEX_STRING new_db;
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2870
  int expected_error,actual_error= 0;
2871
  /*
2872 2873 2874
    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
2875
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
2876
    you.
2877
  */
2878
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
2879 2880 2881
  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' */
2882 2883
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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2884

2885
  /*
2886 2887 2888 2889 2890 2891 2892 2893
    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.
2894
  */
2895
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
2896 2897
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

2898
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929
  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();
  }
2930

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2931 2932 2933 2934 2935 2936 2937
  /*
    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
2938
            ::do_apply_event(), then the companion SET also have so
2939
            we don't need to reset_one_shot_variables().
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2940
  */
2941
  if (rpl_filter->db_ok(thd->db))
2942 2943
  {
    thd->set_time((time_t)when);
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2944 2945
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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2946
    VOID(pthread_mutex_lock(&LOCK_thread_count));
2947
    thd->query_id = next_query_id();
2948
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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2949
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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2950
    DBUG_PRINT("query",("%s",thd->query));
2951

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2952
    if (ignored_error_code((expected_error= error_code)) ||
2953
	!check_expected_error(thd,rli,expected_error))
2954 2955 2956
    {
      if (flags2_inited)
        /*
2957 2958
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
2959
        */
2960
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
2961 2962
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
2963 2964
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
2965 2966 2967 2968 2969
      */
      /*
        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
2970 2971 2972
        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).
2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990
      */
      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))))
          {
            /*
2991 2992 2993 2994
              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).
2995
            */
2996
            set_slave_thread_default_charset(thd, rli);
2997 2998 2999 3000 3001
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
3002 3003 3004
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
3005
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
3006 3007 3008 3009 3010 3011
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024
      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;
3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039
      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;
      
3040 3041
      thd->table_map_for_update= (table_map)table_map_for_update;
      
3042
      /* Execute the query (note that we bypass dispatch_command()) */
3043 3044
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
3045
      log_slow_statement(thd);
3046
    }
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3047 3048
    else
    {
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3049
      /*
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3050 3051 3052 3053 3054
        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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3055
      */
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3056
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
3057
        clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
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3058
      else
3059
      {
3060
        rli->report(ERROR_LEVEL, expected_error, 
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3061
                          "\
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3062
Query partially completed on the master (error on master: %d) \
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3063 3064 3065
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; \
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3066
START SLAVE; . Query: '%s'", expected_error, thd->query);
3067
        thd->is_slave_error= 1;
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3068 3069 3070
      }
      goto end;
    }
3071

3072
    /* If the query was not ignored, it is printed to the general log */
3073
    if (!thd->is_error() || thd->main_da.sql_errno() != ER_SLAVE_IGNORED_TABLE)
3074
      general_log_write(thd, COM_QUERY, thd->query, thd->query_length);
3075

3076
compare_errors:
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3077 3078

     /*
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3079 3080 3081
      If we expected a non-zero error code, and we don't get the same error
      code, and none of them should be ignored.
    */
3082 3083 3084 3085
    actual_error= thd->is_error() ? thd->main_da.sql_errno() : 0;
    DBUG_PRINT("info",("expected_error: %d  sql_errno: %d",
 		       expected_error, actual_error));
    if ((expected_error != actual_error) &&
3086 3087 3088
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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3089
    {
3090
      rli->report(ERROR_LEVEL, 0,
3091 3092
                      "\
Query caused different errors on master and slave.     \
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3093
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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3094
Default database: '%s'. Query: '%s'",
3095 3096
                      ER_SAFE(expected_error),
                      expected_error,
3097
                      actual_error ? thd->main_da.message() : "no error",
3098 3099
                      actual_error,
                      print_slave_db_safe(db), query_arg);
3100
      thd->is_slave_error= 1;
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3101 3102 3103 3104 3105
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
3106
 	     ignored_error_code(actual_error))
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3107 3108
    {
      DBUG_PRINT("info",("error ignored"));
3109
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
3110
      thd->killed= THD::NOT_KILLED;
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3111 3112 3113
    }
    /*
      Other cases: mostly we expected no error and get one.
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3114
    */
3115
    else if (thd->is_slave_error || thd->is_fatal_error)
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3116
    {
3117
      rli->report(ERROR_LEVEL, actual_error,
3118
                      "Error '%s' on query. Default database: '%s'. Query: '%s'",
3119
                      (actual_error ? thd->main_da.message() :
3120 3121
                       "unexpected success or fatal error"),
                      print_slave_db_safe(thd->db), query_arg);
3122
      thd->is_slave_error= 1;
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3123
    }
3124 3125 3126 3127 3128 3129 3130 3131 3132

    /*
      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, ...);
3133
      thd->is_slave_error = 1;
3134 3135 3136 3137
      }
      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...
3138

3139 3140 3141 3142 3143 3144 3145
      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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3146 3147
  } /* End of if (db_ok(... */

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3148
end:
3149
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3150 3151 3152 3153 3154 3155
  /*
    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
3156 3157 3158
    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.
3159
  */
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3160
  thd->catalog= 0;
3161
  thd->set_db(NULL, 0);                 /* will free the current database */
3162
  DBUG_PRINT("info", ("end: query= 0"));
3163
  thd->query= 0;			// just to be sure
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  thd->query_length= 0;
3165
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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  close_thread_tables(thd);      
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  /*
    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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  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3178
  return thd->is_slave_error;
3179 3180
}

3181
int Query_log_event::do_update_pos(Relay_log_info *rli)
3182
{
3183
  /*
3184 3185 3186
    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.
3187
  */
3188 3189 3190 3191 3192 3193 3194
  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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3195
}
3196 3197


3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221
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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#endif
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/**************************************************************************
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	Start_log_event_v3 methods
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**************************************************************************/
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#ifndef MYSQL_CLIENT
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Start_log_event_v3::Start_log_event_v3()
  :Log_event(), created(0), binlog_version(BINLOG_VERSION),
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   dont_set_created(0)
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{
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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/*
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  Start_log_event_v3::pack_info()
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*/
3241

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Start_log_event_v3::pack_info(Protocol *protocol)
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{
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  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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#endif
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/*
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  Start_log_event_v3::print()
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*/
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#ifdef MYSQL_CLIENT
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void Start_log_event_v3::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
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  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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  if (!print_event_info->short_form)
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  {
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    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);
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    if (created)
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      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
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    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
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      my_b_printf(&cache, "# Warning: this binlog was not closed properly. "
                  "Most probably mysqld crashed writing it.\n");
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  }
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  if (!is_artificial_event() && created)
3281
  {
3282
#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
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    /*
      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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    my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
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#else
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    my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
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#endif
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  }
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  if (temp_buf &&
      print_event_info->base64_output_mode != BASE64_OUTPUT_NEVER &&
      !print_event_info->short_form)
  {
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    if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
      my_b_printf(&cache, "BINLOG '\n");
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    print_base64(&cache, print_event_info, FALSE);
    print_event_info->printed_fd_event= TRUE;
  }
3303
  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
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/*
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  Start_log_event_v3::Start_log_event_v3()
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*/
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Start_log_event_v3::Start_log_event_v3(const char* buf,
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                                       const Format_description_log_event
                                       *description_event)
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  :Log_event(buf, description_event)
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{
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  buf+= description_event->common_header_len;
  binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
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  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
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  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
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  created= uint4korr(buf+ST_CREATED_OFFSET);
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  dont_set_created= 1;
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}

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/*
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  Start_log_event_v3::write()
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*/
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#ifndef MYSQL_CLIENT
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bool Start_log_event_v3::write(IO_CACHE* file)
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{
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  char buff[START_V3_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy(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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  return (write_header(file, sizeof(buff)) ||
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          my_b_safe_write(file, (uchar*) buff, sizeof(buff)));
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}
3343
#endif
3344

3345

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3347

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/**
  Start_log_event_v3::do_apply_event() .
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  The master started

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    IMPLEMENTATION
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    - To handle the case where the master died without having time to write
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    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).
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  @todo
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    - Remove all active user locks.
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    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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*/

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int Start_log_event_v3::do_apply_event(Relay_log_info const *rli)
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{
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  DBUG_ENTER("Start_log_event_v3::do_apply_event");
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  switch (binlog_version)
  {
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  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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    */
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    if (created)
    {
      close_temporary_tables(thd);
      cleanup_load_tmpdir();
    }
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    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;

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    /*
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       Now the older formats; in that case load_tmpdir is cleaned up by the I/O
       thread.
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    */
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  case 1:
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    if (strncmp(rli->relay_log.description_event_for_exec->server_version,
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                "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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    /*
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      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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    */
    break;
  default:
    /* this case is impossible */
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    DBUG_RETURN(1);
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  }
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  DBUG_RETURN(0);
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3424

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/***************************************************************************
       Format_description_log_event methods
****************************************************************************/

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/**
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  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.
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*/

Format_description_log_event::
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Format_description_log_event(uint8 binlog_ver, const char* server_ver)
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  :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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3587 3588 3589 3590 3591 3592
  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*
3603
                             description_event)
3604
  :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;
}

3726
#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
3746

3747
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3748
int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
3749
{
3750
  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).
  */
3764
  if (!is_artificial_event() && created && thd->transaction.all.ha_list)
3765
  {
3766
    /* 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
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  /*
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    If this event comes from ourselves, there is no cleaning task to
3777
    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).
3779
  */
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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.
    */
    DBUG_RETURN(Start_log_event_v3::do_apply_event(rli));
  }
  DBUG_RETURN(0);
}

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int Format_description_log_event::do_update_pos(Relay_log_info *rli)
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{
  /* save the information describing this binlog */
  delete rli->relay_log.description_event_for_exec;
  rli->relay_log.description_event_for_exec= this;

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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;
3819
  }
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  else
  {
    return Log_event::do_update_pos(rli);
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  }
}

3826
Log_event::enum_skip_reason
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Format_description_log_event::do_shall_skip(Relay_log_info *rli)
3828
{
3829
  return Log_event::EVENT_SKIP_NOT;
3830
}
3831

3832 3833
#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]));
}


3865
  /**************************************************************************
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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
3868
   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).
  **************************************************************************/
3881

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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()
3888
{
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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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    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'"
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    21 + sql_ex.line_term_len*4 + 2 +       // " LINES TERMINATED BY 'str'"
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    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'"
    15 + 22 +                               // " IGNORE xxx  LINES"
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    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
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}
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void Load_log_event::print_query(bool need_db, char *buf,
                                 char **end, char **fn_start, char **fn_end)
{
  char *pos= buf;

  if (need_db && db && db_len)
3911
  {
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    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
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  pos= strmov(pos, "LOAD DATA ");
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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 '");
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  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
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  if (sql_ex.opt_flags & REPLACE_FLAG)
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    pos= strmov(pos, " REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
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    pos= strmov(pos, " IGNORE ");

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

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

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  /* We have to create all optinal fields as the default is not empty */
3943
  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);
3949

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
3955 3956
  if (sql_ex.line_start_len)
  {
3957
    pos= strmov(pos, " STARTING BY ");
3958
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
3959
  }
3960

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  if ((long) skip_lines > 0)
3962 3963
  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
3965 3966
    pos= strmov(pos," LINES ");    
  }
3967 3968 3969 3970

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
3972
    pos= strmov(pos, " (");
3973 3974 3975
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
3980
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
3983
    }
3984
    *pos++= ')';
3985
  }
3986

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  *end= pos;
}


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

3995
  if (!(buf= (char*) my_malloc(get_query_buffer_length(), MYF(MY_WME))))
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    return;
  print_query(TRUE, buf, &end, 0, 0);
  protocol->store(buf, end-buf, &my_charset_bin);
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  my_free(buf, MYF(0));
4000
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4002

4003

4004 4005
#ifndef MYSQL_CLIENT

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/*
4007
  Load_log_event::write_data_header()
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*/
4009

4010
bool Load_log_event::write_data_header(IO_CACHE* file)
4011
{
4012
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
4014 4015 4016 4017 4018
  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);
4019
  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
4020
}
4021

4022

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/*
4024
  Load_log_event::write_data_body()
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*/
4026

4027
bool Load_log_event::write_data_body(IO_CACHE* file)
4028
{
4029 4030 4031
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
4032
  {
4033 4034
    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
4035
      return 1;
4036
  }
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  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));
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}

4042

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/*
4044
  Load_log_event::Load_log_event()
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*/
4046

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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,
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			       bool ignore, bool using_trans)
4052
  :Log_event(thd_arg,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
4054
             using_trans),
4055
   thread_id(thd_arg->thread_id),
4056
   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 : ""),
4060
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
4064
  exec_time = (ulong) (end_time  - thd_arg->start_time);
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  /* 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;
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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;
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  sql_ex.empty_flags= 0;
4088

4089
  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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  }
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  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
4099

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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;
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  skip_lines = ex->skip_lines;
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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);
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  }

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
4130

4131

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/**
  @note
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    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
4136
*/
4137 4138 4139 4140
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");
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  /*
    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;
4157 4158
}

4159

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4160
/*
4161
  Load_log_event::copy_log_event()
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4162
*/
4163

4164
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
4165 4166
                                   int body_offset,
                                   const Format_description_log_event *description_event)
4167
{
4168
  DBUG_ENTER("Load_log_event::copy_log_event");
4169
  uint data_len;
4170
  char* buf_end = (char*)buf + event_len;
4171 4172
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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4173
  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
4174 4175 4176 4177 4178
  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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4179
	  
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4180
  if ((int) event_len < body_offset)
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4181
    DBUG_RETURN(1);
4182 4183 4184 4185
  /*
    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.
  */
4186 4187 4188
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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4189
    DBUG_RETURN(1);
4190
  
4191
  data_len = event_len - body_offset;
4192
  if (num_fields > data_len) // simple sanity check against corruption
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4193
    DBUG_RETURN(1);
4194
  for (uint i = 0; i < num_fields; i++)
4195
    field_block_len += (uint)field_lens[i] + 1;
4196

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4197 4198 4199 4200
  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
4201 4202
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
4203

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4204
  DBUG_RETURN(0);
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4205 4206 4207
}


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4208
/*
4209
  Load_log_event::print()
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4210
*/
4211 4212

#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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4218

4219
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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4220
			   bool commented)
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4221
{
4222 4223
  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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4225
  if (!print_event_info->short_form)
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4226
  {
4227 4228 4229
    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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4230 4231
  }

4232
  bool different_db= 1;
4233
  if (db)
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4234
  {
4235 4236 4237 4238 4239 4240
    /*
      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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4241
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
4242
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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4244
  }
4245
  
4246
  if (db && db[0] && different_db)
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4247
    my_b_printf(&cache, "%suse %s%s\n", 
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4248
            commented ? "# " : "",
4249
            db, print_event_info->delimiter);
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4250

4251
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
4253 4254
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
4255
  my_b_printf(&cache, "%sLOAD DATA ",
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4256
              commented ? "# " : "");
4257
  if (check_fname_outside_temp_buf())
4258 4259
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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4260

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4261
  if (sql_ex.opt_flags & REPLACE_FLAG)
4262
    my_b_printf(&cache," REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
4264
    my_b_printf(&cache," IGNORE ");
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4265
  
4266 4267 4268
  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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4269

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4270
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
4271 4272 4273
    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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4274
     
4275 4276
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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4277
     
4278 4279
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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4280

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4281

4282
  if (sql_ex.line_start)
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4283
  {
4284 4285
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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4286
  }
4287
  if ((long) skip_lines > 0)
4288
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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4289

4290 4291 4292 4293
  if (num_fields)
  {
    uint i;
    const char* field = fields;
4294
    my_b_printf(&cache, " (");
4295
    for (i = 0; i < num_fields; i++)
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4296
    {
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4297
      if (i)
4298 4299
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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4300
	  
4301
      field += field_lens[i]  + 1;
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4302
    }
4303
    my_b_printf(&cache, ")");
4304
  }
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4305

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4306
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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4307
  DBUG_VOID_RETURN;
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4308
}
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4309
#endif /* MYSQL_CLIENT */
4310

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4311
#ifndef MYSQL_CLIENT
4312

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4313
/**
4314
  Load_log_event::set_fields()
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4315

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4316 4317 4318 4319 4320
  @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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4321
*/
4322

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4323
void Load_log_event::set_fields(const char* affected_db, 
4324 4325
				List<Item> &field_list,
                                Name_resolution_context *context)
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4326 4327
{
  uint i;
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4328
  const char* field = fields;
4329
  for (i= 0; i < num_fields; i++)
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4330
  {
4331 4332
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
4333
    field+= field_lens[i]  + 1;
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4334
  }
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4335
}
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4336
#endif /* !MYSQL_CLIENT */
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4337 4338


unknown's avatar
SCRUM  
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4339
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363
/**
  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
4364
    0           Success
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4365 4366
  @retval
    1           Failure
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4367
*/
4368

4369
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
4370
                                   bool use_rli_only_for_errors)
4371
{
4372 4373 4374 4375
  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);
4376
  DBUG_ASSERT(thd->query == 0);
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4377
  thd->query_length= 0;                         // Should not be needed
4378
  thd->is_slave_error= 0;
4379
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
4380

4381
  /* see Query_log_event::do_apply_event() and BUG#13360 */
4382
  DBUG_ASSERT(!rli->m_table_map.count());
4383
  /*
4384
    Usually lex_start() is called by mysql_parse(), but we need it here
4385 4386
    as the present method does not call mysql_parse().
  */
4387 4388 4389
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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4390
  if (!use_rli_only_for_errors)
4391
  {
4392 4393
    /*
      Saved for InnoDB, see comment in
4394
      Query_log_event::do_apply_event()
4395
    */
4396
    const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
4397
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
4398
  }
4399 4400
 
   /*
4401 4402 4403 4404 4405 4406 4407
    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
4408
    done by testing rules in Create_file_log_event::do_apply_event()
4409 4410 4411
    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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4412 4413 4414 4415 4416 4417 4418 4419


    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
4420
            ::do_apply_event(), then the companion SET also have so
4421
            we don't need to reset_one_shot_variables().
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4422
  */
4423
  if (rpl_filter->db_ok(thd->db))
4424
  {
4425 4426
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
4427
    thd->query_id = next_query_id();
4428
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
4429 4430 4431 4432 4433 4434
    /*
      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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4435
    mysql_reset_errors(thd, 0);
4436 4437 4438

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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4439
    tables.db= thd->strmake(thd->db, thd->db_length);
4440
    tables.alias = tables.table_name = (char*) table_name;
4441
    tables.lock_type = TL_WRITE;
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4442
    tables.updating= 1;
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4443

4444
    // the table will be opened in mysql_load    
4445
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
4446 4447 4448 4449 4450 4451 4452 4453
    {
      // 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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4454
      char *end;
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4455
      enum enum_duplicates handle_dup;
4456
      bool ignore= 0;
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4457 4458
      char *load_data_query;

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4459
      /*
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4460 4461
        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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4462
      */
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4463
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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4464
      {
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4465 4466 4467 4468 4469
        /*
          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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4470
      }
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4471 4472 4473 4474 4475 4476 4477

      print_query(FALSE, load_data_query, &end, (char **)&thd->lex->fname_start,
                  (char **)&thd->lex->fname_end);
      *end= 0;
      thd->query_length= end - load_data_query;
      thd->query= load_data_query;

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4478
      if (sql_ex.opt_flags & REPLACE_FLAG)
4479
      {
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4480
	handle_dup= DUP_REPLACE;
4481
      }
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4482
      else if (sql_ex.opt_flags & IGNORE_FLAG)
4483 4484 4485 4486
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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4487
      else
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4488
      {
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4489
        /*
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4490
	  When replication is running fine, if it was DUP_ERROR on the
4491
          master then we could choose IGNORE here, because if DUP_ERROR
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4492
          suceeded on master, and data is identical on the master and slave,
4493
          then there should be no uniqueness errors on slave, so IGNORE is
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4494
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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4495 4496 4497
          (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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4498 4499

          If reading from net (a 3.23 master), mysql_load() will change this
4500
          to IGNORE.
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4501 4502
        */
        handle_dup= DUP_ERROR;
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4503
      }
4504 4505 4506 4507 4508 4509 4510 4511 4512 4513
      /*
        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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4514

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4515
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
4516 4517 4518 4519 4520
      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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4521 4522 4523 4524 4525
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
4526 4527 4528 4529 4530 4531

      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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4532
      List<Item> field_list;
4533 4534
      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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4535
      thd->variables.pseudo_thread_id= thread_id;
4536 4537 4538 4539 4540 4541 4542 4543 4544
      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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4545
      /*
4546
        It is safe to use tmp_list twice because we are not going to
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4547 4548
        update it inside mysql_load().
      */
4549 4550
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
4551
                     handle_dup, ignore, net != 0))
4552
        thd->is_slave_error= 1;
4553
      if (thd->cuted_fields)
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4554
      {
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4555
	/* log_pos is the position of the LOAD event in the master log */
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4556 4557 4558 4559 4560 4561 4562
        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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4563
      }
4564 4565 4566
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
4567 4568
  }
  else
4569 4570 4571 4572 4573 4574 4575 4576 4577
  {
    /*
      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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4578 4579

error:
4580
  thd->net.vio = 0; 
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4581
  const char *remember_db= thd->db;
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4582
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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4583
  thd->catalog= 0;
4584
  thd->set_db(NULL, 0);                   /* will free the current database */
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4585
  thd->query= 0;
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4586
  thd->query_length= 0;
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4587
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
4588
  close_thread_tables(thd);
4589 4590

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
4591
                  thd->is_slave_error= 0; thd->is_fatal_error= 1;);
4592

4593
  if (thd->is_slave_error)
4594
  {
4595
    /* this err/sql_errno code is copy-paste from net_send_error() */
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4596 4597
    const char *err;
    int sql_errno;
4598 4599 4600 4601 4602
    if (thd->is_error())
    {
      err= thd->main_da.message();
      sql_errno= thd->main_da.sql_errno();
    }
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4603 4604 4605 4606 4607
    else
    {
      sql_errno=ER_UNKNOWN_ERROR;
      err=ER(sql_errno);       
    }
4608
    rli->report(ERROR_LEVEL, sql_errno,"\
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4609
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
4610
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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4611
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4612 4613
    return 1;
  }
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4614
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4615

4616
  if (thd->is_fatal_error)
4617
  {
4618 4619 4620 4621 4622 4623 4624 4625 4626
    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);
4627 4628 4629
    return 1;
  }

4630
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
4631
}
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4632
#endif
4633 4634


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4635
/**************************************************************************
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4636
  Rotate_log_event methods
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4637
**************************************************************************/
4638

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4639
/*
4640
  Rotate_log_event::pack_info()
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4641
*/
4642

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4643
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4644
void Rotate_log_event::pack_info(Protocol *protocol)
4645
{
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4646
  char buf1[256], buf[22];
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4647
  String tmp(buf1, sizeof(buf1), log_cs);
4648
  tmp.length(0);
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4649
  tmp.append(new_log_ident, ident_len);
4650
  tmp.append(STRING_WITH_LEN(";pos="));
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4651 4652
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
4653
}
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4654
#endif
4655

4656

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4657
/*
4658
  Rotate_log_event::print()
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4659
*/
4660 4661

#ifdef MYSQL_CLIENT
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4662
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4663
{
4664
  char buf[22];
4665 4666
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4667

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4668
  if (print_event_info->short_form)
4669
    return;
4670 4671
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
4672
  if (new_log_ident)
4673
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
4674
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
4675
}
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4676
#endif /* MYSQL_CLIENT */
4677 4678


4679

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4680
/*
4681
  Rotate_log_event::Rotate_log_event() (2 constructors)
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4682
*/
4683

4684 4685

#ifndef MYSQL_CLIENT
4686
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
4687 4688 4689 4690 4691 4692 4693 4694
                                   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];
4695
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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4696 4697
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
4698 4699
#endif
  if (flags & DUP_NAME)
4700
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
4701 4702
  if (flags & RELAY_LOG)
    set_relay_log_event();
4703 4704 4705 4706 4707
  DBUG_VOID_RETURN;
}
#endif


4708 4709
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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4710
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
4711
{
4712
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
4713
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
4714 4715
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
4716 4717
  uint ident_offset;
  if (event_len < header_size)
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4718
    DBUG_VOID_RETURN;
4719
  buf += header_size;
4720 4721 4722 4723
  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; 
4724
  set_if_smaller(ident_len,FN_REFLEN-1);
4725
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
4726
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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4727
  DBUG_VOID_RETURN;
4728
}
4729 4730


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4731
/*
4732
  Rotate_log_event::write()
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4733
*/
4734

4735
#ifndef MYSQL_CLIENT
4736
bool Rotate_log_event::write(IO_CACHE* file)
4737
{
4738
  char buf[ROTATE_HEADER_LEN];
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4739
  int8store(buf + R_POS_OFFSET, pos);
4740
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
4741 4742
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
4743
}
4744
#endif
4745

4746

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4747
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4748

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4749 4750
/*
  Got a rotate log event from the master.
4751

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4752 4753
  This is mainly used so that we can later figure out the logname and
  position for the master.
4754

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4755 4756 4757
  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.
4758

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4759
  @retval
4760
    0	ok
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4761
*/
4762
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
4763
{
4764
  DBUG_ENTER("Rotate_log_event::do_update_pos");
4765 4766 4767 4768
#ifndef DBUG_OFF
  char buf[32];
#endif

4769 4770
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
4771 4772
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
4773

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4774
  /*
4775 4776 4777 4778
    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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4779 4780 4781 4782 4783
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
4784 4785 4786 4787

    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
4788
    relay log, which shall not change the group positions.
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4789
  */
4790
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
4791
      !is_relay_log_event() &&
4792
      !rli->is_in_group())
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4793
  {
4794
    pthread_mutex_lock(&rli->data_lock);
4795 4796 4797 4798
    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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4799 4800
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
4801
    rli->inc_group_relay_log_pos(pos, TRUE /* skip_lock */);
4802 4803
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
4804
                        rli->group_master_log_name,
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4805
                        (ulong) rli->group_master_log_pos));
4806 4807 4808
    pthread_mutex_unlock(&rli->data_lock);
    flush_relay_log_info(rli);
    
4809
    /*
4810 4811
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
4812 4813 4814 4815 4816
      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);
4817
    set_slave_thread_default_charset(thd, rli);
4818
    thd->variables.sql_mode= global_system_variables.sql_mode;
4819 4820
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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4821
  }
4822 4823 4824
  else
    rli->inc_event_relay_log_pos();

4825

4826
  DBUG_RETURN(0);
4827
}
4828

4829 4830

Log_event::enum_skip_reason
4831
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
4832
{
4833
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
4834 4835

  switch (reason) {
4836
  case Log_event::EVENT_SKIP_NOT:
4837
  case Log_event::EVENT_SKIP_COUNT:
4838
    return Log_event::EVENT_SKIP_NOT;
4839

4840 4841
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
4842 4843
  }
  DBUG_ASSERT(0);
4844
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
4845 4846
}

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4847
#endif
4848 4849


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4850
/**************************************************************************
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4851
	Intvar_log_event methods
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4852
**************************************************************************/
4853

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4854
/*
4855
  Intvar_log_event::pack_info()
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4856
*/
4857

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4858
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4859
void Intvar_log_event::pack_info(Protocol *protocol)
4860
{
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4861 4862
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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  *pos++= '=';
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4864
  pos= longlong10_to_str(val, pos, -10);
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4865
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4866
}
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4867
#endif
4868

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4869

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4870
/*
4871
  Intvar_log_event::Intvar_log_event()
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4872
*/
4873

4874 4875 4876
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4877
{
4878 4879 4880
  /* 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];
4881 4882
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
4883 4884
}

4885

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4886
/*
4887
  Intvar_log_event::get_var_type_name()
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4888
*/
4889 4890

const char* Intvar_log_event::get_var_type_name()
4891
{
4892 4893 4894 4895 4896
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
4897 4898
}

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4899

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4900
/*
4901
  Intvar_log_event::write()
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4902
*/
4903

4904
#ifndef MYSQL_CLIENT
4905
bool Intvar_log_event::write(IO_CACHE* file)
4906
{
4907 4908
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
4909
  int8store(buf + I_VAL_OFFSET, val);
4910 4911
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4912
}
4913
#endif
4914

4915

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4916
/*
4917
  Intvar_log_event::print()
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4918
*/
4919 4920

#ifdef MYSQL_CLIENT
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4921
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4922
{
4923 4924 4925
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
4926 4927
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4928

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4929
  if (!print_event_info->short_form)
4930
  {
4931 4932
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
4933
  }
4934

4935
  my_b_printf(&cache, "SET ");
4936 4937 4938 4939 4940 4941 4942
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
4943 4944 4945 4946
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
4947
  }
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4948 4949
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
4950
}
4951
#endif
4952

4953

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4954
/*
4955
  Intvar_log_event::do_apply_event()
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4956
*/
4957

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4958
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
4959
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
4960
{
4961 4962 4963 4964
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4965
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4966

4967 4968
  switch (type) {
  case LAST_INSERT_ID_EVENT:
4969 4970
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
4971 4972
    break;
  case INSERT_ID_EVENT:
4973
    thd->force_one_auto_inc_interval(val);
4974 4975
    break;
  }
4976 4977 4978
  return 0;
}

4979
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
4980
{
4981
  rli->inc_event_relay_log_pos();
4982
  return 0;
4983
}
4984 4985 4986


Log_event::enum_skip_reason
4987
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
4988 4989
{
  /*
4990 4991 4992 4993 4994 4995
    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.
4996
  */
4997
  return continue_group(rli);
4998 4999
}

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5000
#endif
5001

5002

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5003
/**************************************************************************
5004
  Rand_log_event methods
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5005
**************************************************************************/
5006

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5007
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5008
void Rand_log_event::pack_info(Protocol *protocol)
5009
{
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5010 5011 5012 5013 5014
  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);
5015
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
5016
}
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5017
#endif
5018 5019


5020 5021 5022
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
5023
{
5024 5025 5026
  /* 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];
5027 5028
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
5029 5030
}

5031

5032
#ifndef MYSQL_CLIENT
5033
bool Rand_log_event::write(IO_CACHE* file)
5034
{
5035
  uchar buf[16];
5036 5037
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
5038 5039
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
5040
}
5041
#endif
5042

5043 5044

#ifdef MYSQL_CLIENT
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5045
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5046
{
5047 5048 5049
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5050
  char llbuff[22],llbuff2[22];
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5051
  if (!print_event_info->short_form)
5052
  {
5053 5054
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
5055
  }
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5056 5057 5058
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
5059
}
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5060
#endif /* MYSQL_CLIENT */
5061

5062

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5063
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5064
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
5065
{
5066 5067 5068 5069
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5070
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5071

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5072 5073
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
5074 5075 5076
  return 0;
}

5077
int Rand_log_event::do_update_pos(Relay_log_info *rli)
5078
{
5079
  rli->inc_event_relay_log_pos();
5080 5081
  return 0;
}
5082

5083 5084

Log_event::enum_skip_reason
5085
Rand_log_event::do_shall_skip(Relay_log_info *rli)
5086 5087
{
  /*
5088 5089 5090 5091 5092 5093
    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.
5094
  */
5095
  return continue_group(rli);
5096 5097
}

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5098
#endif /* !MYSQL_CLIENT */
5099

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5100

5101 5102 5103 5104 5105 5106 5107
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
5108 5109
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
5110
  pos= longlong10_to_str(xid, pos, 10);
5111
  pos= strmov(pos, " */");
5112 5113 5114 5115
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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5116 5117 5118
/**
  @note
  It's ok not to use int8store here,
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5119
  as long as xid_t::set(ulonglong) and
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5120 5121
  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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5122 5123
  identical numbers compare identically
*/
5124 5125 5126 5127

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
5128 5129
  :Log_event(buf, description_event)
{
5130 5131 5132
  /* 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];
5133
  memcpy((char*) &xid, buf, sizeof(xid));
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}


5137
#ifndef MYSQL_CLIENT
5138 5139
bool Xid_log_event::write(IO_CACHE* file)
{
5140
  DBUG_EXECUTE_IF("do_not_write_xid", return 0;);
5141
  return write_header(file, sizeof(xid)) ||
5142
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
5143
}
5144
#endif
5145 5146 5147


#ifdef MYSQL_CLIENT
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void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5149
{
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  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
5154
  {
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    char buf[64];
    longlong10_to_str(xid, buf, 10);

5158 5159
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
5160
  }
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  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
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}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5167
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
5168
{
5169
  /* For a slave Xid_log_event is COMMIT */
5170 5171
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
5172
  return end_trans(thd, COMMIT);
5173
}
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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));
}
5185 5186 5187
#endif /* !MYSQL_CLIENT */


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/**************************************************************************
5189
  User_var_log_event methods
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**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
5196
  uint val_offset= 4 + name_len;
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  uint event_len= val_offset;

  if (is_null)
  {
5201 5202
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
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      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
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      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
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      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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    case DECIMAL_RESULT:
    {
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      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
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      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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    case STRING_RESULT:
5237
      /* 15 is for 'COLLATE' and other chars */
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      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
5240
      CHARSET_INFO *cs;
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      if (!buf)
        return;
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      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
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        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
5253 5254
        event_len= p-buf;
      }
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      break;
5256
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
5263
  buf[1]= '`';
5264
  memcpy(buf+2, name, name_len);
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  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
5267
  protocol->store(buf, event_len, &my_charset_bin);
5268
  my_free(buf, MYF(0));
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}
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#endif /* !MYSQL_CLIENT */
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User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
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{
5278 5279 5280
  /* 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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  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
5283 5284
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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  if (is_null)
  {
    type= STRING_RESULT;
5288
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
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    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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		       UV_CHARSET_NUMBER_SIZE);
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    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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  }
}


5304
#ifndef MYSQL_CLIENT
5305
bool User_var_log_event::write(IO_CACHE* file)
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{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
5310
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
5311
  uint buf1_length;
5312
  ulong event_length;
5313

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  int4store(buf, name_len);
5315 5316 5317 5318
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
5319
    val_len= 0;                                 // Length of 'pos'
5320 5321
  }    
  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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    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;
5339
      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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    case STRING_RESULT:
5344
      pos= (uchar*) val;
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      break;
5346
    case ROW_RESULT:
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    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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  }
5354 5355 5356 5357 5358

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

  return (write_header(file, event_length) ||
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          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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}
5364
#endif
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5366

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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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void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
5374 5375 5376
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
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  {
5379 5380
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

5383
  my_b_printf(&cache, "SET @`");
5384
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
5385
  my_b_printf(&cache, "`");
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  if (is_null)
  {
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    my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
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  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
5396
      char real_buf[FMT_G_BUFSIZE(14)];
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      float8get(real_val, val);
5398 5399
      my_sprintf(real_buf, (real_buf, "%.14g", real_val));
      my_b_printf(&cache, ":=%s%s\n", real_buf, print_event_info->delimiter);
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      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
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      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
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      break;
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    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
5412 5413
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

5417
      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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    case STRING_RESULT:
5424
    {
5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438
      /*
        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.
      */
5439 5440 5441 5442
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
5443
        break; // no error, as we are 'void'
5444
      str_to_hex(hex_str, val, val_len);
5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455
      /*
        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);
5457
      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);
5461
      my_afree(hex_str);
5462
    }
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      break;
5464
    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
5472

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/*
5475
  User_var_log_event::do_apply_event()
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*/
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5477

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5478
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5479
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
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{
  Item *it= 0;
5482 5483 5484
  CHARSET_INFO *charset;
  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;
5488 5489
  double real_val;
  longlong int_val;
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5491 5492 5493 5494
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5495
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5496

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
5506
      it= new Item_float(real_val, 0);
5507
      val= (char*) &real_val;		// Pointer to value in native format
5508
      val_len= 8;
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      break;
    case INT_RESULT:
5511 5512 5513
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
5514
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
5518
      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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    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
5527
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
5534 5535 5536
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
5537 5538 5539 5540

    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.
5541
  */
5542 5543 5544
  if (e.fix_fields(thd, 0))
    return 1;

5545 5546 5547 5548 5549
  /*
    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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5550
  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
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  free_root(thd->mem_root,0);
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5553 5554 5555
  return 0;
}

5556
int User_var_log_event::do_update_pos(Relay_log_info *rli)
5557
{
5558
  rli->inc_event_relay_log_pos();
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  return 0;
}
5561

5562
Log_event::enum_skip_reason
5563
User_var_log_event::do_shall_skip(Relay_log_info *rli)
5564 5565 5566 5567 5568 5569 5570 5571 5572
{
  /*
    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.
  */
5573
  return continue_group(rli);
5574
}
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#endif /* !MYSQL_CLIENT */
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/**************************************************************************
5579
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
5583
#ifdef MYSQL_CLIENT
5584
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
5585
{
5586 5587
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
5589
    return;
5590 5591
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
5592 5593
}
#endif  
5594

5595
#ifndef MYSQL_CLIENT
5596
void Slave_log_event::pack_info(Protocol *protocol)
5597
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
5599 5600 5601 5602 5603 5604 5605
  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);
5607
  protocol->store(buf, pos-buf, &my_charset_bin);
5608
}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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/**
  @todo
  re-write this better without holding both locks at the same time
*/
5617
Slave_log_event::Slave_log_event(THD* thd_arg,
5618
				 Relay_log_info* rli)
5619
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
5620 5621 5622 5623
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
5624

5625
  Master_info* mi = rli->mi;
5626 5627 5628 5629
  // 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);
5630
  master_log_len = strlen(rli->group_master_log_name);
5631 5632 5633
  // 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))))
5634
  {
5635 5636 5637
    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;
5638
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
5639
    master_port = mi->port;
5640
    master_pos = rli->group_master_log_pos;
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5641
    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
5642
			(ulong) master_pos));
5643
  }
5644 5645 5646 5647 5648 5649
  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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5650
#endif /* !MYSQL_CLIENT */
5651 5652 5653 5654 5655 5656 5657 5658 5659


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


#ifdef MYSQL_CLIENT
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5660
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5661
{
5662 5663
  Write_on_release_cache cache(&print_event_info->head_cache, file);

5664
  char llbuff[22];
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5665
  if (print_event_info->short_form)
5666
    return;
5667 5668
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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5669
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
5670 5671
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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5672
#endif /* MYSQL_CLIENT */
5673 5674 5675 5676 5677 5678 5679 5680


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


5681
#ifndef MYSQL_CLIENT
5682
bool Slave_log_event::write(IO_CACHE* file)
5683
{
5684
  ulong event_length= get_data_size();
5685 5686 5687
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
5688 5689

  return (write_header(file, event_length) ||
5690
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
5691
}
5692
#endif
5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703


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;
  master_host_len = strlen(master_host);
  // safety
  master_log = master_host + master_host_len + 1;
  if (master_log > mem_pool + data_size)
5704
  {
5705 5706
    master_host = 0;
    return;
5707
  }
5708 5709
  master_log_len = strlen(master_log);
}
5710

5711

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5712
/** This code is not used, so has not been updated to be format-tolerant. */
5713 5714
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
5715
{
5716
  if (event_len < LOG_EVENT_HEADER_LEN)
5717
    return;
5718
  event_len -= LOG_EVENT_HEADER_LEN;
5719 5720 5721 5722 5723
  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);
5724 5725
}

5726

5727
#ifndef MYSQL_CLIENT
5728
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
5729 5730 5731
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
5732
  return 0;
5733
}
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5734
#endif /* !MYSQL_CLIENT */
5735 5736


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5737
/**************************************************************************
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5738
	Stop_log_event methods
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5739
**************************************************************************/
5740

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5741
/*
5742
  Stop_log_event::print()
5743
*/
5744 5745

#ifdef MYSQL_CLIENT
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5746
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5747
{
5748 5749 5750
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5751
  if (print_event_info->short_form)
5752 5753
    return;

5754 5755
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
5756
}
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5757
#endif /* MYSQL_CLIENT */
5758

5759

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5760
#ifndef MYSQL_CLIENT
5761
/*
5762 5763 5764 5765 5766 5767 5768
  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
5769
  Start_log_event_v3::do_apply_event(), not here. Because if we come
5770
  here, the master was sane.
5771
*/
5772
int Stop_log_event::do_update_pos(Relay_log_info *rli)
5773
{
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5774 5775
  /*
    We do not want to update master_log pos because we get a rotate event
5776
    before stop, so by now group_master_log_name is set to the next log.
5777
    If we updated it, we will have incorrect master coordinates and this
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5778
    could give false triggers in MASTER_POS_WAIT() that we have reached
5779
    the target position when in fact we have not.
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5780
  */
5781 5782 5783 5784 5785 5786 5787
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
5788 5789
  return 0;
}
5790

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5791
#endif /* !MYSQL_CLIENT */
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5792
#endif /* HAVE_REPLICATION */
5793

5794

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5795
/**************************************************************************
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5796
	Create_file_log_event methods
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5797
**************************************************************************/
5798 5799

/*
5800
  Create_file_log_event ctor
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5801
*/
5802 5803

#ifndef MYSQL_CLIENT
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5804 5805 5806 5807
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,
5808
                      bool ignore,
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5809
		      uchar* block_arg, uint block_len_arg, bool using_trans)
5810
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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5811
		  using_trans),
5812
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
5813
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
5814
{
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5815
  DBUG_ENTER("Create_file_log_event");
5816
  sql_ex.force_new_format();
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5817
  DBUG_VOID_RETURN;
5818
}
5819

5820

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5821
/*
5822
  Create_file_log_event::write_data_body()
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5823
*/
5824

5825
bool Create_file_log_event::write_data_body(IO_CACHE* file)
5826
{
5827 5828
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
5829
    return res;
5830 5831
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
5832 5833
}

5834

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5835
/*
5836
  Create_file_log_event::write_data_header()
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5837
*/
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5838

5839
bool Create_file_log_event::write_data_header(IO_CACHE* file)
5840
{
5841
  bool res;
5842
  uchar buf[CREATE_FILE_HEADER_LEN];
5843 5844
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
5845
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
5846
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
5847 5848 5849
}


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5850
/*
5851
  Create_file_log_event::write_base()
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5852
*/
5853

5854
bool Create_file_log_event::write_base(IO_CACHE* file)
5855
{
5856 5857 5858 5859
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
5860 5861 5862
  return res;
}

5863
#endif /* !MYSQL_CLIENT */
5864

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5865
/*
5866
  Create_file_log_event ctor
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5867
*/
5868

5869 5870 5871
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)
5872
{
5873 5874 5875 5876 5877
  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];
5878
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
5879 5880 5881 5882 5883 5884 5885
      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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5886
    DBUG_VOID_RETURN;
5887
  if (description_event->binlog_version!=1)
5888
  {
5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905
    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);
5906
    if (len < block_offset)
5907
      DBUG_VOID_RETURN;
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5908
    block = (uchar*)buf + block_offset;
5909 5910 5911 5912 5913 5914
    block_len = len - block_offset;
  }
  else
  {
    sql_ex.force_new_format();
    inited_from_old = 1;
5915
  }
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5916
  DBUG_VOID_RETURN;
5917 5918
}

5919

unknown's avatar
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5920
/*
5921
  Create_file_log_event::print()
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5922
*/
5923 5924

#ifdef MYSQL_CLIENT
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5925
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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5926
				  bool enable_local)
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5927
{
5928 5929
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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5930
  if (print_event_info->short_form)
5931 5932
  {
    if (enable_local && check_fname_outside_temp_buf())
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5933
      Load_log_event::print(file, print_event_info);
5934
    return;
5935 5936 5937 5938
  }

  if (enable_local)
  {
unknown's avatar
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5939
    Load_log_event::print(file, print_event_info,
5940
			  !check_fname_outside_temp_buf());
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5941 5942 5943 5944
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
5945
    my_b_printf(&cache, "#"); 
5946 5947
  }

5948
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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5949
}
5950

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5951

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5952
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5953
{
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5954
  print(file, print_event_info, 0);
5955
}
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5956
#endif /* MYSQL_CLIENT */
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5957

5958

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5959
/*
5960
  Create_file_log_event::pack_info()
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5961
*/
5962

unknown's avatar
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5963
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5964
void Create_file_log_event::pack_info(Protocol *protocol)
5965
{
5966 5967 5968
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
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5969
  pos= strmov(pos + db_len, ";table=");
5970
  memcpy(pos, table_name, table_name_len);
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5971
  pos= strmov(pos + table_name_len, ";file_id=");
5972 5973 5974
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
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5975
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
5976
}
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5977
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5978 5979


5980
/**
5981
  Create_file_log_event::do_apply_event()
5982 5983 5984 5985 5986 5987 5988
  Constructor for Create_file_log_event to intantiate an event
  from the relay log on the slave.

  @retval
    0           Success
  @retval
    1           Failure
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5989
*/
5990

unknown's avatar
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5991
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5992
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
5993
{
unknown's avatar
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5994 5995
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
5996 5997 5998
  int fd = -1;
  IO_CACHE file;
  int error = 1;
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5999

6000
  bzero((char*)&file, sizeof(file));
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6001 6002
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
6003
  thd_proc_info(thd, proc_info);
6004 6005 6006 6007
  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 ||
6008 6009 6010
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6011 6012 6013
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6014 6015 6016 6017
    goto err;
  }
  
  // a trick to avoid allocating another buffer
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6018 6019
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
6020 6021
  if (write_base(&file))
  {
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6022
    strmov(ext, ".info"); // to have it right in the error message
6023 6024 6025
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
6026 6027 6028 6029 6030 6031
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
6032 6033 6034 6035
  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)
6036
  {
6037 6038 6039
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6040 6041
    goto err;
  }
6042
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6043
  {
6044 6045 6046
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
6047 6048
    goto err;
  }
6049 6050
  error=0;					// Everything is ok

6051 6052 6053 6054 6055
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
6056
  thd_proc_info(thd, 0);
6057
  return error != 0;
6058
}
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6059
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6060

6061

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6062
/**************************************************************************
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6063
	Append_block_log_event methods
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6064
**************************************************************************/
6065

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6066
/*
6067
  Append_block_log_event ctor
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6068
*/
6069 6070

#ifndef MYSQL_CLIENT  
6071 6072
Append_block_log_event::Append_block_log_event(THD *thd_arg,
                                               const char *db_arg,
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6073
					       uchar *block_arg,
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6074 6075 6076
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
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6077
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
6078 6079
{
}
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6080
#endif
6081 6082


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6083
/*
6084
  Append_block_log_event ctor
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6085
*/
6086

6087 6088 6089
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)
6090
{
6091 6092 6093 6094 6095 6096
  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)
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6097
    DBUG_VOID_RETURN;
6098
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
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6099
  block= (uchar*)buf + total_header_len;
6100
  block_len= len - total_header_len;
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6101
  DBUG_VOID_RETURN;
6102 6103 6104
}


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6105
/*
6106
  Append_block_log_event::write()
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6107
*/
6108

6109
#ifndef MYSQL_CLIENT
6110
bool Append_block_log_event::write(IO_CACHE* file)
6111
{
6112
  uchar buf[APPEND_BLOCK_HEADER_LEN];
6113
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
6114 6115
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
6116
	  my_b_safe_write(file, (uchar*) block, block_len));
6117
}
6118
#endif
6119 6120


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6121
/*
6122
  Append_block_log_event::print()
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6123
*/
6124 6125

#ifdef MYSQL_CLIENT  
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6126
void Append_block_log_event::print(FILE* file,
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6127
				   PRINT_EVENT_INFO* print_event_info)
6128
{
6129 6130
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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6131
  if (print_event_info->short_form)
6132
    return;
6133 6134 6135
  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);
6136
}
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6137
#endif /* MYSQL_CLIENT */
6138 6139


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6140
/*
6141
  Append_block_log_event::pack_info()
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6142
*/
6143

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6144
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6145
void Append_block_log_event::pack_info(Protocol *protocol)
6146 6147 6148 6149 6150 6151
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
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6152
  protocol->store(buf, length, &my_charset_bin);
6153 6154 6155
}


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6156
/*
6157
  Append_block_log_event::get_create_or_append()
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6158 6159
*/

6160
int Append_block_log_event::get_create_or_append() const
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6161
{
6162
  return 0; /* append to the file, fail if not exists */
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}

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6165
/*
6166
  Append_block_log_event::do_apply_event()
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6167
*/
6168

6169
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
6170
{
6171
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
6172
  int fd;
6173
  int error = 1;
6174
  DBUG_ENTER("Append_block_log_event::do_apply_event");
6175

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6176 6177
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
6178
  thd_proc_info(thd, proc_info);
6179 6180 6181 6182 6183 6184 6185
  if (get_create_or_append())
  {
    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)
    {
6186 6187 6188
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
6189 6190 6191
      goto err;
    }
  }
6192 6193
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
6194
  {
6195 6196 6197
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
6198 6199
    goto err;
  }
6200
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6201
  {
6202 6203 6204
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
6205 6206 6207
    goto err;
  }
  error=0;
6208

6209 6210 6211
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
6212
  thd_proc_info(thd, 0);
6213
  DBUG_RETURN(error);
6214
}
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#endif
6216 6217


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6218
/**************************************************************************
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	Delete_file_log_event methods
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**************************************************************************/
6221

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6222
/*
6223
  Delete_file_log_event ctor
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6224
*/
6225 6226

#ifndef MYSQL_CLIENT
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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)
6230 6231
{
}
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#endif
6233

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6234
/*
6235
  Delete_file_log_event ctor
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6236
*/
6237

6238 6239 6240
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)
6241
{
6242 6243 6244
  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))
6245
    return;
6246
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
6247 6248 6249
}


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6250
/*
6251
  Delete_file_log_event::write()
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6252
*/
6253

6254
#ifndef MYSQL_CLIENT
6255
bool Delete_file_log_event::write(IO_CACHE* file)
6256
{
6257
 uchar buf[DELETE_FILE_HEADER_LEN];
6258
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
6259 6260
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
6261
}
6262
#endif
6263 6264


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6265
/*
6266
  Delete_file_log_event::print()
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6267
*/
6268 6269

#ifdef MYSQL_CLIENT  
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void Delete_file_log_event::print(FILE* file,
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				  PRINT_EVENT_INFO* print_event_info)
6272
{
6273 6274
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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  if (print_event_info->short_form)
6276
    return;
6277 6278
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
6279
}
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#endif /* MYSQL_CLIENT */
6281

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6282
/*
6283
  Delete_file_log_event::pack_info()
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6284
*/
6285

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6286
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6287
void Delete_file_log_event::pack_info(Protocol *protocol)
6288 6289 6290 6291
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
6292
  protocol->store(buf, (int32) length, &my_charset_bin);
6293
}
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6294
#endif
6295

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6296
/*
6297
  Delete_file_log_event::do_apply_event()
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6298
*/
6299

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6300
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6301
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
6302 6303
{
  char fname[FN_REFLEN+10];
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6304
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
6305
  (void) my_delete(fname, MYF(MY_WME));
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  strmov(ext, ".info");
6307
  (void) my_delete(fname, MYF(MY_WME));
6308
  return 0;
6309
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6311 6312


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6313
/**************************************************************************
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6314
	Execute_load_log_event methods
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**************************************************************************/
6316

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6317
/*
6318
  Execute_load_log_event ctor
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6319
*/
6320 6321

#ifndef MYSQL_CLIENT  
6322 6323
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)
6326 6327
{
}
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#endif
6329 6330
  

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6331
/*
6332
  Execute_load_log_event ctor
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6333
*/
6334

6335 6336 6337
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)
6338
{
6339 6340 6341
  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))
6342
    return;
6343
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
6344 6345 6346
}


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6347
/*
6348
  Execute_load_log_event::write()
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6349
*/
6350

6351
#ifndef MYSQL_CLIENT
6352
bool Execute_load_log_event::write(IO_CACHE* file)
6353
{
6354
  uchar buf[EXEC_LOAD_HEADER_LEN];
6355
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
6356 6357
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
6358
}
6359
#endif
6360 6361


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6362
/*
6363
  Execute_load_log_event::print()
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6364
*/
6365 6366

#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)
6369
{
6370 6371
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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6372
  if (print_event_info->short_form)
6373
    return;
6374 6375 6376
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
6377
}
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6378
#endif
6379

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6380
/*
6381
  Execute_load_log_event::pack_info()
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6382
*/
6383

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6384
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6385
void Execute_load_log_event::pack_info(Protocol *protocol)
6386 6387 6388 6389
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
6390
  protocol->store(buf, (int32) length, &my_charset_bin);
6391 6392 6393
}


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6394
/*
6395
  Execute_load_log_event::do_apply_event()
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6396
*/
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6397

6398
int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
6399 6400
{
  char fname[FN_REFLEN+10];
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6401
  char *ext;
6402
  int fd;
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6403
  int error= 1;
6404
  IO_CACHE file;
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  Load_log_event *lev= 0;
6406

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  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
6408 6409
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
6410 6411 6412
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6413 6414 6415
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
6416 6417
    goto err;
  }
6418
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
6419 6420
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
6421
      lev->get_type_code() != NEW_LOAD_EVENT)
6422
  {
6423
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
6424
                    "file '%s' appears corrupted", fname);
6425 6426
    goto err;
  }
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6427

6428
  lev->thd = thd;
6429
  /*
6430
    lev->do_apply_event should use rli only for errors i.e. should
6431 6432
    not advance rli's position.

6433
    lev->do_apply_event is the place where the table is loaded (it
6434
    calls mysql_load()).
6435
  */
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6436

6437
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
6438
  if (lev->do_apply_event(0,rli,1)) 
6439
  {
6440 6441 6442 6443 6444 6445 6446 6447
    /*
      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.
    */
6448
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
6449 6450
    if (tmp)
    {
6451
      rli->report(ERROR_LEVEL, rli->last_error().number,
6452
                  "%s. Failed executing load from '%s'", tmp, fname);
6453 6454
      my_free(tmp,MYF(0));
    }
6455 6456
    goto err;
  }
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6457 6458 6459 6460 6461 6462 6463 6464 6465 6466
  /*
    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;
  }
6467
  (void) my_delete(fname, MYF(MY_WME));
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  memcpy(ext, ".data", 6);
6469
  (void) my_delete(fname, MYF(MY_WME));
6470
  error = 0;
6471

6472 6473 6474
err:
  delete lev;
  if (fd >= 0)
6475
  {
6476
    my_close(fd, MYF(0));
6477 6478
    end_io_cache(&file);
  }
6479
  return error;
6480
}
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6481

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6482
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6483 6484


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/**************************************************************************
	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)
6510
int Begin_load_query_log_event::get_create_or_append() const
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6511
{
6512
  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529
#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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/**************************************************************************
	Execute_load_query_log_event methods
**************************************************************************/


#ifndef MYSQL_CLIENT
Execute_load_query_log_event::
6537
Execute_load_query_log_event(THD *thd_arg, const char* query_arg,
6538 6539 6540 6541 6542
                             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,
                             THD::killed_state killed_err_arg):
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  Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
6544
                  suppress_use, killed_err_arg),
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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;
}


6581
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
6585
  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);
6589 6590
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
6592
#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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  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)
{
6609 6610 6611
  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)
  {
6615
    my_b_write(&cache, (uchar*) query, fn_pos_start);
6616 6617 6618
    my_b_printf(&cache, " LOCAL INFILE \'");
    my_b_printf(&cache, local_fname);
    my_b_printf(&cache, "\'");
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    if (dup_handling == LOAD_DUP_REPLACE)
6620 6621
      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
6622
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
6623
    my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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  }
  else
  {
6627
    my_b_write(&cache, (uchar*) query, q_len);
6628
    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)
6632
    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;
6641
  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
6663
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;

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  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
6673

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  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
6675

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  /* Replace filename and LOCAL keyword in query before executing it */
6677
  if (buf == NULL)
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  {
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    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;
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  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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  case LOAD_DUP_IGNORE:
6693
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
6696
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
6702
  p= strmake(p, STRING_WITH_LEN(" INTO"));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

6705
  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;

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  /*
    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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/**************************************************************************
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	sql_ex_info methods
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**************************************************************************/
6726

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/*
6728
  sql_ex_info::write_data()
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*/
6730

6731
bool sql_ex_info::write_data(IO_CACHE* file)
6732 6733 6734
{
  if (new_format())
  {
6735 6736 6737 6738 6739
    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) ||
6740
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
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  }
  else
  {
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    /**
      @todo This is sensitive to field padding. We should write a
      char[7], not an old_sql_ex. /sven
    */
6748 6749 6750 6751 6752 6753 6754 6755
    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;
6756
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
6757 6758 6759 6760
  }
}


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/*
6762
  sql_ex_info::init()
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*/
6764

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const char *sql_ex_info::init(const char *buf, const char *buf_end,
                              bool use_new_format)
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{
  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.
    */
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    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))
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      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;
}
6810 6811 6812 6813 6814 6815 6816 6817 6818 6819


/**************************************************************************
	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),
6820
    m_row_count(0),
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    m_table(tbl_arg),
    m_table_id(tid),
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    m_width(tbl_arg ? tbl_arg->s->fields : 1),
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    m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0) 
#ifdef HAVE_REPLICATION
6826
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
6827
#endif
6828
{
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  /*
    We allow a special form of dummy event when the table, and cols
6831
    are null and the table id is ~0UL.  This is a temporary
6832
    solution, to be able to terminate a started statement in the
6833
    binary log: the extraneous events will be removed in the future.
6834
   */
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  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
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  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);
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  /* if bitmap_init fails, caught in is_valid() */
6843 6844
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
6845
                          m_width,
6846
                          false)))
6847 6848 6849
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
6850
    {
6851
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
6852 6853
      create_last_word_mask(&m_cols);
    }
6854
  }
6855
  else
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  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
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}
#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),
6868
    m_row_count(0),
6869
#ifndef MYSQL_CLIENT
6870
    m_table(NULL),
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#endif
    m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
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    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
6875
#endif
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{
  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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  DBUG_PRINT("enter",("event_len: %u  common_header_len: %d  "
		      "post_header_len: %d",
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		      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
  {
6896
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

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  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
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  uchar *ptr_after_width= (uchar*) ptr_width;
6906
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
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  m_width = net_field_length(&ptr_after_width);
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  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,
6912
                          m_width,
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                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
6917
    create_last_word_mask(&m_cols);
6918
    ptr_after_width+= (m_width + 7) / 8;
6919
    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
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  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
6927

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  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));

6934
    /* if bitmap_init fails, caught in is_valid() */
6935 6936
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
6937
                            m_width,
6938 6939 6940 6941
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
6942
      create_last_word_mask(&m_cols_ai);
6943
      ptr_after_width+= (m_width + 7) / 8;
6944 6945
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
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    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

6955
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
6956

6957
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
6959
                     m_table_id, m_flags, m_width, (ulong) data_size));
6960

6961
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
6962 6963
  if (likely((bool)m_rows_buf))
  {
6964
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6965
    m_curr_row= m_rows_buf;
6966
#endif
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    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().
6982
  my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
6983 6984
}

6985 6986 6987 6988
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

6989 6990
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007

  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);
  data_size+= end - buf;

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

  data_size+= (m_rows_cur - m_rows_buf);
  return data_size; 
}


7008
#ifndef MYSQL_CLIENT
7009
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
7010 7011 7012 7013 7014 7015
{
  /*
    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
  */
7016
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
7019 7020 7021 7022 7023
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7024
  DBUG_DUMP("row_data", row_data, min(length, 32));
7025
#endif
7026 7027

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
7028
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
7029 7030 7031
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
7032
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
7033
  {
7034
    size_t const block_size= 1024;
7035
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
7036
    my_ptrdiff_t const new_alloc= 
7037
        block_size * ((cur_size + length + block_size - 1) / block_size);
7038

7039
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
7040
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057
    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;
  }

7058
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
7059 7060
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
7061
  m_row_count++;
7062 7063 7064 7065 7066
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7067
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
7068
{
7069
  DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
7070
  int error= 0;
7071
  /*
7072 7073 7074
    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
7075
    success.
7076
   */
7077
  if (m_table_id == ~0UL)
7078 7079 7080 7081 7082 7083 7084
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

7085
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7086
    close_thread_tables(thd);
7087 7088 7089
    thd->clear_error();
    DBUG_RETURN(0);
  }
7090 7091 7092

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
7093
    do_apply_event(). We still check here to prevent future coding
7094
    errors.
7095 7096 7097 7098
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
7099 7100 7101 7102
    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.
7103
  */
7104
  if (!thd->lock)
7105 7106
  {
    /*
7107 7108 7109 7110 7111 7112 7113
      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.
7114
    */
7115
    lex_start(thd);
7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128
    mysql_reset_thd_for_next_command(thd);

    /*
      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();
    }

7129

7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145 7146
    /*
      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));

7147
    if (simple_open_n_lock_tables(thd, rli->tables_to_lock))
7148
    {
7149 7150
      uint actual_error= thd->main_da.sql_errno();
      if (thd->is_slave_error || thd->is_fatal_error)
7151
      {
7152 7153 7154 7155 7156 7157 7158 7159 7160
        /*
          Error reporting borrowed from Query_log_event with many excessive
          simplifications (we don't honour --slave-skip-errors)
        */
        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;
7161
      }
7162 7163
      const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
      DBUG_RETURN(actual_error);
7164
    }
7165 7166 7167 7168 7169 7170 7171 7172 7173 7174

    /*
      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.
    */

    {
7175
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
7176 7177 7178 7179 7180 7181
      for ( ; ptr ; ptr= static_cast<RPL_TABLE_LIST*>(ptr->next_global))
      {
        if (ptr->m_tabledef.compatible_with(rli, ptr->table))
        {
          mysql_unlock_tables(thd, thd->lock);
          thd->lock= 0;
7182
          thd->is_slave_error= 1;
7183
          const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7184 7185 7186 7187 7188
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

7189
    /*
7190 7191
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
7192 7193 7194

      We also invalidate the query cache for all the tables, since
      they will now be changed.
7195 7196 7197 7198 7199 7200 7201

      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.
7202
     */
7203
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
7204
    {
7205
      const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
7206
    }
7207 7208 7209
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
7210 7211
  }

7212 7213
  TABLE* 
    table= 
7214
    m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
7215

7216 7217
  DBUG_PRINT("debug", ("m_table: 0x%lx, m_table_id: %lu", (ulong) m_table, m_table_id));

7218 7219 7220 7221
  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
7222
      (this was set up by Table_map_log_event::do_apply_event()
7223
      which tested replicate-* rules).
7224
    */
7225 7226 7227 7228 7229 7230 7231 7232 7233 7234 7235

    /*
      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);

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    /*
      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.
     */
7245
    const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
7246

7247 7248
     if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
      set_flags(COMPLETE_ROWS_F);
7249

7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265
    /* 
      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);
7266

7267 7268
    this->slave_exec_mode= slave_exec_mode_options; // fix the mode

7269 7270
    // Do event specific preparations 
    error= do_before_row_operations(rli);
7271

7272
    // row processing loop
7273

7274 7275
    while (error == 0 && m_curr_row < m_rows_end)
    {
7276 7277 7278 7279
      /* 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;
7280 7281 7282

      error= do_exec_row(rli);

7283 7284 7285
      DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
      DBUG_ASSERT(error != HA_ERR_RECORD_DELETED);

7286 7287 7288 7289 7290
      table->in_use = old_thd;
      switch (error)
      {
      case 0:
	break;
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      /*
        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:
7301

7302
        which are not included into to the list.
7303 7304 7305

        Note that HA_ERR_RECORD_DELETED is not in the list since
        do_exec_row() should not return that error code.
7306
      */
7307
      case HA_ERR_RECORD_CHANGED:
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      case HA_ERR_KEY_NOT_FOUND:
      case HA_ERR_END_OF_FILE:
7310 7311 7312 7313 7314 7315 7316 7317 7318 7319 7320 7321 7322 7323
      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:

        if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1)
        {
          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);
          error= 0;
        }
7324
        break;
7325
        
7326
      default:
7327
	thd->is_slave_error= 1;
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	break;
      }

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      /*
       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.
      */ 
   
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      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));

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      if (!m_curr_row_end && !error)
        unpack_current_row(rli);
  
      // 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;
 
    } // row processing loop

7353
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
7354
                    const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
7355
    error= do_after_row_operations(rli, error);
7356
    if (!cache_stmt)
7357 7358 7359 7360
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
7361
  } // if (table)
7362

7363
  /*
7364 7365
    We need to delay this clear until here bacause unpack_current_row() uses
    master-side table definitions stored in rli.
7366 7367
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
7368
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7369
  
7370 7371
  if (error)
  {                     /* error has occured during the transaction */
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    slave_rows_error_report(ERROR_LEVEL, error, rli, thd, table,
                            get_type_str(), RPL_LOG_NAME, (ulong) log_pos);
  }
  if (error)
  {
7377
    /*
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      If one day we honour --skip-slave-errors in row-based replication, and
      the error should be skipped, then we would clear mappings, rollback,
      close tables, but the slave SQL thread would not stop and then may
      assume the mapping is still available, the tables are still open...
      So then we should clear mappings/rollback/close here only if this is a
      STMT_END_F.
      For now we code, knowing that error is not skippable and so slave SQL
      thread is certainly going to stop.
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7386
      rollback at the caller along with sbr.
7387
    */
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7388
    thd->reset_current_stmt_binlog_row_based();
7389
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, error);
7390
    thd->is_slave_error= 1;
7391 7392 7393
    DBUG_RETURN(error);
  }

7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413 7414 7415
  /*
    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.
  */
  if (table && (table->s->primary_key == MAX_KEY) &&
      !cache_stmt && get_flags(STMT_END_F) == RLE_NO_FLAGS)
  {
    /*
      ------------ 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
7416
      Relay_log_info::last_event_start_time and all its occurrences.
7417
    */
7418
    const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
7419 7420 7421 7422 7423
  }

  DBUG_RETURN(0);
}

7424
Log_event::enum_skip_reason
7425
Rows_log_event::do_shall_skip(Relay_log_info *rli)
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{
  /*
    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);
}

7438 7439 7440 7441 7442 7443 7444 7445 7446 7447
/**
   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.
 */
7448

7449 7450 7451
static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD * thd)
{
  int error;
7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468
  {
    /*
      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).
    */
    thd->binlog_flush_pending_rows_event(true);
7469

7470 7471 7472 7473 7474 7475 7476 7477 7478 7479
    /*
      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.
    */
    error= ha_autocommit_or_rollback(thd, 0);
7480

7481 7482 7483 7484 7485 7486 7487 7488 7489 7490
    /*
      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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7491
    thd->reset_current_stmt_binlog_row_based();
7492

7493 7494 7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512 7513 7514 7515 7516 7517 7518 7519
    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))
  {
    if ((error= rows_event_stmt_cleanup(rli, thd)) == 0)
7520
    {
7521 7522 7523 7524
      /*
        Indicate that a statement is finished.
        Step the group log position if we are not in a transaction,
        otherwise increase the event log position.
7525
      */
7526 7527
      rli->stmt_done(log_pos, when);

7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538
      /*
        Clear any errors pushed in thd->net.last_err* if for example "no key
        found" (as this is allowed). This is a safety measure; apparently
        those errors (e.g. when executing a Delete_rows_log_event of a
        non-existing row, like in rpl_row_mystery22.test,
        thd->net.last_error = "Can't find record in 't1'" and last_errno=1032)
        do not become visible. We still prefer to wipe them out.
      */
      thd->clear_error();
    }
    else
7539
    {
7540 7541 7542
      rli->report(ERROR_LEVEL, error,
                  "Error in %s event: commit of row events failed, "
                  "table `%s`.`%s`",
7543 7544
                  get_type_str(), m_table->s->db.str,
                  m_table->s->table_name.str);
7545
    }
7546
  }
7547
  else
7548
  {
7549
    rli->inc_event_relay_log_pos();
7550 7551
  }

7552
  DBUG_RETURN(error);
7553
}
7554

7555 7556 7557 7558 7559
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
7560
  uchar buf[ROWS_HEADER_LEN];	// No need to init the buffer
7561
  DBUG_ASSERT(m_table_id != ~0UL);
7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578
  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.
  */
7579
  uchar sbuf[sizeof(m_width)];
7580
  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
7581
  bool res= false;
7582 7583
  uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
  DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
7584

7585 7586
  DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
  res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
7587

7588 7589
  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,
7590 7591 7592 7593 7594 7595
                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
7596 7597 7598
    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,
7599 7600
                                no_bytes_in_map(&m_cols_ai));
  }
7601 7602
  DBUG_DUMP("rows", m_rows_buf, data_size);
  res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
7603 7604 7605

  return res;

7606 7607 7608
}
#endif

7609
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
7610 7611
void Rows_log_event::pack_info(Protocol *protocol)
{
7612 7613 7614
  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
7615
  size_t bytes= my_snprintf(buf, sizeof(buf),
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7616
                               "table_id: %lu%s", m_table_id, flagstr);
7617
  protocol->store(buf, bytes, &my_charset_bin);
7618 7619 7620
}
#endif

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#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);
7632 7633 7634
    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
7635 7636 7637 7638 7639
    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
7640 7641
    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
7642 7643 7644 7645
  }
}
#endif

7646
/**************************************************************************
7647
	Table_map_log_event member functions and support functions
7648 7649
**************************************************************************/

7650 7651 7652 7653
/**
  @page How replication of field metadata works.
  
  When a table map is created, the master first calls 
7654
  Table_map_log_event::save_field_metadata() which calculates how many 
7655
  values will be in the field metadata. Only those fields that require the 
7656 7657 7658 7659 7660 7661 7662
  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.

7663 7664 7665 7666 7667 7668 7669
  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.

7670 7671 7672 7673 7674 7675 7676 7677 7678 7679
  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. 
7680 7681
*/

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7682
#if !defined(MYSQL_CLIENT)
7683 7684 7685 7686 7687 7688
/**
  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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7689
  @retval  0  Ok.
7690

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7691 7692
  @todo
  We may want to consider changing the encoding of the information.
7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710 7711
  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++)
7712 7713
    index+= m_table->s->field[i]->save_field_metadata(&m_field_metadata[index]);
  DBUG_RETURN(index);
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}
#endif /* !defined(MYSQL_CLIENT) */

7717 7718 7719 7720 7721 7722 7723 7724
/*
  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,
                                         bool is_transactional, uint16 flags)
7725
  : Log_event(thd, 0, true),
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    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),
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    m_colcnt(tbl->s->fields),
    m_memory(NULL),
    m_table_id(tid),
    m_flags(flags),
    m_data_size(0),
    m_field_metadata(0),
    m_field_metadata_size(0),
    m_null_bits(0),
    m_meta_memory(NULL)
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{
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  DBUG_ASSERT(m_table_id != ~0UL);
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  /*
    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;);
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  m_data_size+= m_dblen + 2;	// Include length and terminating \0
  m_data_size+= m_tbllen + 2;	// Include length and terminating \0
  m_data_size+= 1 + m_colcnt;	// COLCNT and column types

7759
  /* If malloc fails, caught in is_valid() */
7760
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
7761
  {
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    m_coltype= reinterpret_cast<uchar*>(m_memory);
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    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,
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                                 &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
    plus one or two bytes for number of elements in the field metadata array.
  */
  if (m_field_metadata_size > 255)
    m_data_size+= m_field_metadata_size + 2; 
  else
    m_data_size+= m_field_metadata_size + 1; 

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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
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    m_table(NULL),
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#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)
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{
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  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
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  DBUG_DUMP("event buffer", (uchar*) buf, event_len);
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#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);
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    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= TM_FLAGS_OFFSET;
  }

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  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 */
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  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 */
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  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 */
7872
  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);
7875

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  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),
7879
                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
7880

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  /* 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;
    bytes_read= ptr_after_colcnt - (uchar *)buf;
    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)
7935
int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
7936
{
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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;
  table_list->table_id= m_table_id;
  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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  int error= 0;

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  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))))
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  {
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    my_free(memory, MYF(MY_WME));
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  }
  else
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  {
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    DBUG_ASSERT(thd->lex->query_tables != table_list);
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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.
7986
    */
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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);
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    table_list->m_tabledef_valid= TRUE;
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    /*
7992
      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.
7994
    */
7995
    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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  }

8001
  DBUG_RETURN(error);
8002
}
8003

8004
Log_event::enum_skip_reason
8005
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.
  */
8011
  return continue_group(rli);
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}

8014
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)
{
8025
  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);

8046 8047
  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
8048

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  uchar cbuf[sizeof(m_colcnt)];
  uchar *const cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
  DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
8052

8053 8054 8055 8056
  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
8057
  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
8058

8059
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
8060
          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
8061
          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.
 */

8078
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
8079 8080 8081
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
8082
    size_t bytes= my_snprintf(buf, sizeof(buf),
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                                 "table_id: %lu (%s.%s)",
8084
                              m_table_id, m_dbnam, m_tblnam);
8085 8086
    protocol->store(buf, bytes, &my_charset_bin);
}
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#endif

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#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  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)
8137 8138
int 
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
8139 8140 8141
{
  int error= 0;

8142 8143 8144
  /**
     todo: to introduce a property for the event (handler?) which forces
     applying the event in the replace (idempotent) fashion.
8145
  */
8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184
  if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1 ||
      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).
  */
8201
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
8202 8203 8204
  
  /* Honor next number column if present */
  m_table->next_number_field= m_table->found_next_number_field;
8205 8206 8207
  return error;
}

8208
int 
8209
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
8210
                                              int error)
8211
{
8212
  int local_error= 0;
8213
  m_table->next_number_field=0;
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  if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1 ||
      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
    */
  }
8227
  if ((local_error= m_table->file->ha_end_bulk_insert()))
8228
  {
8229
    m_table->file->print_error(local_error, MYF(0));
8230 8231
  }
  return error? error : local_error;
8232 8233
}

8234
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247

/*
  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;
}

8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271 8272
/**
   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;
}

8273 8274
/**
  Write the current row into event's table.
8275

8276 8277 8278 8279 8280
  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.
8281

8282 8283 8284 8285 8286
  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.
8287

8288 8289 8290 8291
  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.
8292

8293 8294 8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305 8306 8307 8308
  @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
8309
Rows_log_event::write_row(const Relay_log_info *const rli,
8310
                          const bool overwrite)
8311
{
8312 8313
  DBUG_ENTER("write_row");
  DBUG_ASSERT(m_table != NULL && thd != NULL);
8314

8315
  TABLE *table= m_table;  // pointer to event's table
8316 8317 8318 8319
  int error;
  int keynum;
  auto_afree_ptr<char> key(NULL);

8320 8321
  /* fill table->record[0] with default values */

8322
  if ((error= prepare_record(table, m_width,
8323 8324 8325 8326 8327
                             TRUE /* check if columns have def. values */)))
    DBUG_RETURN(error);
  
  /* unpack row into table->record[0] */
  error= unpack_current_row(rli); // TODO: how to handle errors?
8328 8329 8330 8331 8332 8333 8334 8335 8336 8337
  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);
  }
  
  
8338
#ifndef DBUG_OFF
8339
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8340 8341 8342 8343
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

8344 8345 8346 8347 8348 8349 8350 8351
  /* 
    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. 
   */

8352 8353
  while ((error= table->file->ha_write_row(table->record[0])))
  {
8354 8355 8356 8357
    if (error == HA_ERR_LOCK_DEADLOCK ||
        error == HA_ERR_LOCK_WAIT_TIMEOUT ||
        (keynum= table->file->get_dup_key(error)) < 0 ||
        !overwrite)
8358
    {
8359
      DBUG_PRINT("info",("get_dup_key returns %d)", keynum));
8360
      /*
8361 8362 8363
        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
8364 8365 8366
        - either because the error was not "duplicate key" error
        - or because the information which key is not available
      */
8367
      table->file->print_error(error, MYF(0));
8368
      DBUG_RETURN(error);
8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379
    }
    /*
       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.
     */
8380
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
8381
    {
8382
      DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
8383
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
8384
      if (error)
8385
      {
8386
        DBUG_PRINT("info",("rnd_pos() returns error %d",error));
8387 8388
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8389
        table->file->print_error(error, MYF(0));
8390
        DBUG_RETURN(error);
8391
      }
8392 8393 8394
    }
    else
    {
8395 8396
      DBUG_PRINT("info",("Locating offending record using index_read_idx()"));

8397 8398
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
8399
        DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
8400
        DBUG_RETURN(my_errno);
8401 8402 8403 8404 8405 8406
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
8407 8408
        {
          DBUG_PRINT("info",("Can't allocate key buffer"));
8409
          DBUG_RETURN(ENOMEM);
8410
        }
8411 8412
      }

8413 8414
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
               0);
8415 8416 8417 8418
      error= table->file->index_read_idx_map(table->record[1], keynum,
                                             (const uchar*)key.get(),
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT);
8419
      if (error)
8420
      {
8421 8422 8423
        DBUG_PRINT("info",("index_read_idx() returns %s", HA_ERR(error)));
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8424
        table->file->print_error(error, MYF(0));
8425
        DBUG_RETURN(error);
8426
      }
8427 8428 8429
    }

    /*
8430
       Now, record[1] should contain the offending row.  That
8431 8432
       will enable us to update it or, alternatively, delete it (so
       that we can insert the new row afterwards).
8433
     */
8434

8435 8436 8437
    /*
      If row is incomplete we will use the record found to fill 
      missing columns.  
8438
    */
8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449
    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
8450

8451
    /*
8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468
       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())
    {
8469
      DBUG_PRINT("info",("Updating row using ha_update_row()"));
8470 8471
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
8472 8473 8474 8475 8476
      switch (error) {
                
      case HA_ERR_RECORD_IS_THE_SAME:
        DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
                           " ha_update_row()"));
8477
        error= 0;
8478 8479 8480 8481 8482 8483
      
      case 0:
        break;
        
      default:    
        DBUG_PRINT("info",("ha_update_row() returns error %d",error));
8484
        table->file->print_error(error, MYF(0));
8485 8486
      }
      
8487
      DBUG_RETURN(error);
8488 8489 8490
    }
    else
    {
8491
      DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
8492
      if ((error= table->file->ha_delete_row(table->record[1])))
8493
      {
8494
        DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
8495
        table->file->print_error(error, MYF(0));
8496
        DBUG_RETURN(error);
8497
      }
8498 8499 8500
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
8501

8502
  DBUG_RETURN(error);
8503 8504
}

8505 8506 8507
#endif

int 
8508
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8509
{
8510
  DBUG_ASSERT(m_table != NULL);
8511 8512 8513 8514
  int error=
    write_row(rli,        /* if 1 then overwrite */
              bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1);
    
8515 8516 8517 8518 8519
  if (error && !thd->is_error())
  {
    DBUG_ASSERT(0);
    my_error(ER_UNKNOWN_ERROR, MYF(0));
  }
8520
  
8521
  return error; 
8522
}
8523

8524 8525 8526 8527 8528
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
8529
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
8530 8531 8532 8533 8534 8535 8536 8537
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8538 8539 8540 8541 8542 8543
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
8544
{
8545 8546 8547 8548 8549 8550 8551 8552 8553 8554 8555 8556
  /*
    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.
   */

8557 8558 8559
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
  DBUG_DUMP("record[1]", table->record[1], table->s->reclength);

8560
  bool result= FALSE;
8561
  uchar saved_x[2], saved_filler[2];
8562 8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574

  if (table->s->null_bytes > 0)
  {
    for (int i = 0 ; i < 2 ; ++i)
    {
      saved_x[i]= table->record[i][0];
      saved_filler[i]= table->record[i][table->s->null_bytes - 1];
      table->record[i][0]|= 1U;
      table->record[i][table->s->null_bytes - 1]|=
        256U - (1U << table->s->last_null_bit_pos);
    }
  }

8575
  if (table->s->blob_fields + table->s->varchar_fields == 0)
8576 8577 8578 8579 8580
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

8581 8582 8583 8584
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
8585 8586 8587 8588 8589
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

8590 8591
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
8592
  {
8593
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
8594 8595 8596 8597
    {
      result= TRUE;
      goto record_compare_exit;
    }
8598
  }
8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613

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)
    {
      table->record[i][0]= saved_x[i];
      table->record[i][table->s->null_bytes - 1]= saved_filler[i];
    }
8614
  }
8615 8616

  return result;
8617 8618
}

8619 8620
/**
  Locate the current row in event's table.
8621

8622 8623 8624 8625
  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.
8626

8627 8628 8629
  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.
8630

8631 8632 8633 8634 8635
  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. 
8636

8637 8638 8639 8640
  @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.
8641

8642 8643
  @note If the engine allows random access of the records, a combination of
  @c position() and @c rnd_pos() will be used. 
8644
 */
8645

8646
int Rows_log_event::find_row(const Relay_log_info *rli)
8647
{
8648
  DBUG_ENTER("Rows_log_event::find_row");
8649 8650

  DBUG_ASSERT(m_table && m_table->in_use != NULL);
8651

8652
  TABLE *table= m_table;
8653
  int error= 0;
8654

8655 8656 8657 8658 8659 8660 8661 8662 8663
  /*
    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);
8664

8665 8666
#ifndef DBUG_OFF
  DBUG_PRINT("info",("looking for the following record"));
8667
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8668
#endif
8669

8670 8671
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
8672 8673 8674 8675 8676 8677
  {
    /*
      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
8678
      the "cursor" (i.e., record[0] in this case) at the correct row.
8679 8680 8681 8682 8683 8684 8685 8686 8687 8688 8689

      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);

8690
    */
8691
    DBUG_PRINT("info",("locating record using primary key (position)"));
8692
    int error= table->file->rnd_pos_by_record(table->record[0]);
8693 8694 8695
    if (error)
    {
      DBUG_PRINT("info",("rnd_pos returns error %d",error));
8696 8697
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
8698 8699
      table->file->print_error(error, MYF(0));
    }
8700
    DBUG_RETURN(error);
8701 8702
  }

8703
  // We can't use position() - try other methods.
8704 8705 8706 8707 8708
  
  /* 
    We need to retrieve all fields
    TODO: Move this out from this function to main loop 
   */
8709
  table->use_all_columns();
unknown's avatar
unknown committed
8710

8711 8712 8713 8714 8715 8716
  /*
    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]);    

8717 8718
  if (table->s->keys > 0)
  {
8719 8720
    DBUG_PRINT("info",("locating record using primary key (index_read)"));

8721
    /* We have a key: search the table using the index */
8722
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
8723 8724 8725
    {
      DBUG_PRINT("info",("ha_index_init returns error %d",error));
      table->file->print_error(error, MYF(0));
8726
      goto err;
8727
    }
8728

8729 8730 8731 8732 8733 8734 8735 8736 8737
    /* 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.
     */
8738
#ifndef HAVE_purify
8739
    DBUG_DUMP("key data", m_key, table->key_info->key_length);
8740 8741
#endif

8742 8743 8744 8745 8746 8747
    /*
      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.
    */
8748 8749 8750 8751
    if (table->s->null_bytes > 0)
      table->record[0][table->s->null_bytes - 1]|=
        256U - (1U << table->s->last_null_bit_pos);

8752
    if ((error= table->file->index_read_map(table->record[0], m_key, 
8753
                                            HA_WHOLE_KEY,
8754
                                            HA_READ_KEY_EXACT)))
8755
    {
8756
      DBUG_PRINT("info",("no record matching the key found in the table"));
8757 8758
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
8759
      table->file->print_error(error, MYF(0));
8760
      table->file->ha_index_end();
8761
      goto err;
8762 8763
    }

8764 8765 8766 8767 8768
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
8769 8770
    DBUG_PRINT("info",("found first matching record")); 
    DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8771
#endif
8772 8773 8774 8775 8776 8777 8778 8779 8780 8781 8782 8783 8784
    /*
      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.
8785
    */
8786
    if (table->key_info->flags & HA_NOSAME)
8787 8788
    {
      table->file->ha_index_end();
8789
      goto ok;
8790
    }
8791

8792 8793
    /*
      In case key is not unique, we still have to iterate over records found
8794 8795
      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].
8796 8797 8798
     */ 
    DBUG_PRINT("info",("non-unique index, scanning it to find matching record")); 

8799
    while (record_compare(table))
8800
    {
8801 8802 8803 8804 8805
      /*
        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.
8806 8807 8808

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
8809
      */
8810 8811
      if (table->s->null_bytes > 0)
      {
8812
        table->record[0][table->s->null_bytes - 1]|=
8813 8814 8815
          256U - (1U << table->s->last_null_bit_pos);
      }

8816
      while ((error= table->file->index_next(table->record[0])))
8817
      {
8818 8819 8820
        /* We just skip records that has already been deleted */
        if (error == HA_ERR_RECORD_DELETED)
          continue;
8821 8822
        DBUG_PRINT("info",("no record matching the given row found"));
        table->file->print_error(error, MYF(0));
8823
        table->file->ha_index_end();
8824
        goto err;
8825 8826
      }
    }
8827 8828 8829 8830 8831

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
8832 8833 8834
  }
  else
  {
8835 8836
    DBUG_PRINT("info",("locating record using table scan (rnd_next)"));

8837
    int restart_count= 0; // Number of times scanning has restarted from top
8838 8839 8840

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
8841 8842 8843 8844
    {
      DBUG_PRINT("info",("error initializing table scan"
                         " (ha_rnd_init returns %d)",error));
      table->file->print_error(error, MYF(0));
8845
      goto err;
8846
    }
8847 8848

    /* Continue until we find the right record or have made a full loop */
8849 8850
    do
    {
8851
  restart_rnd_next:
8852
      error= table->file->rnd_next(table->record[0]);
8853

8854
      DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
8855
      switch (error) {
8856

8857
      case 0:
8858
        break;
8859

8860 8861 8862 8863 8864 8865 8866
      /*
        If the record was deleted, we pick the next one without doing
        any comparisons.
      */
      case HA_ERR_RECORD_DELETED:
        goto restart_rnd_next;

8867
      case HA_ERR_END_OF_FILE:
8868 8869 8870
        if (++restart_count < 2)
          table->file->ha_rnd_init(1);
        break;
8871 8872

      default:
8873 8874 8875
        DBUG_PRINT("info", ("Failed to get next record"
                            " (rnd_next returns %d)",error));
        table->file->print_error(error, MYF(0));
8876
        table->file->ha_rnd_end();
8877
        goto err;
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      }
    }
8880
    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
     */
8886

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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"));
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    else
      DBUG_DUMP("record found", table->record[0], table->s->reclength);
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    table->file->ha_rnd_end();

8896
    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
8897
    goto err;
8898
  }
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ok:
  table->default_column_bitmaps();
8901
  DBUG_RETURN(0);
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err:
  table->default_column_bitmaps();
  DBUG_RETURN(error);
8906
}
8907

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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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  {
    /*
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      We don't need to allocate any memory for m_key since it is not used.
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    */
    return 0;
  }

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  if (m_table->s->keys > 0)
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  {
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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;
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  }
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  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;
}

8971
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8972
{
8973
  int error;
8974
  DBUG_ASSERT(m_table != NULL);
8975

8976
  if (!(error= find_row(rli))) 
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  { 
    /*
8979
      Delete the record found, located in record[0]
8980
    */
8981
    error= m_table->file->ha_delete_row(m_table->record[0]);
8982
  }
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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)
{
9026
  /* 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,
9029
                          m_width,
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                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
9034
    {
9035
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
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      create_last_word_mask(&m_cols_ai);
    }
9038
  }
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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)

9066 9067 9068 9069
int 
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if (m_table->s->keys > 0)
9070
  {
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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;
9075 9076
  }

9077
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
9078

9079
  return 0;
9080 9081
}

9082 9083 9084
int 
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
9085 9086
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
9087 9088
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
9089
  m_key= NULL;
9090 9091 9092 9093

  return error;
}

9094
int 
9095
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
9096
{
9097
  DBUG_ASSERT(m_table != NULL);
9098

9099 9100
  int error= find_row(rli); 
  if (error)
9101 9102 9103 9104 9105 9106 9107
  {
    /*
      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);
9108
    return error;
9109
  }
9110

9111
  /*
9112
    This is the situation after locating BI:
9113

9114 9115 9116
    ===|=== before image ====|=== after image ===|===
       ^                     ^
       m_curr_row            m_curr_row_end
9117

9118 9119 9120
    BI found in the table is stored in record[0]. We copy it to record[1]
    and unpack AI to record[0].
   */
9121

9122
  store_record(m_table,record[1]);
9123

9124 9125
  m_curr_row= m_curr_row_end;
  error= unpack_current_row(rli); // this also updates m_curr_row_end
9126

9127
  /*
9128
    Now we have the right row to update.  The old row (the one we're
9129
    looking for) is in record[1] and the new row is in record[0].
9130
  */
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#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]);
9142 9143
  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 0;
9144 9145 9146

  return error;
}
9147

9148 9149 9150 9151 9152 9153
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
9154
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
9155 9156 9157
}
#endif

9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169 9170 9171

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));

9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182
  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().
    incident_number= INCIDENT_NONE;
    DBUG_VOID_RETURN;
  }
  m_incident= static_cast<Incident>(incident_number);
9183 9184
  char const *ptr= buf + common_header_len + post_header_len;
  char const *const str_end= buf + event_len;
unknown's avatar
unknown committed
9185 9186
  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
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  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];
9218
  size_t bytes;
9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235 9236 9237 9238 9239 9240 9241 9242 9243 9244 9245
  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);
  my_b_printf(&cache, "\n# Incident: %s", description());
}
#endif

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int
9246
Incident_log_event::do_apply_event(Relay_log_info const *rli)
9247
{
9248
  DBUG_ENTER("Incident_log_event::do_apply_event");
9249 9250 9251 9252
  rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
              ER(ER_SLAVE_INCIDENT),
              description(),
              m_message.length > 0 ? m_message.str : "<none>");
9253 9254 9255 9256 9257 9258 9259 9260 9261
  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));
9262
  uchar buf[sizeof(int16)];
9263 9264 9265 9266 9267 9268 9269 9270 9271 9272
  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");
  DBUG_RETURN(write_str(file, m_message.str, m_message.length));
}
9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300 9301 9302 9303


#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()
  :flags2_inited(0), sql_mode_inited(0),
   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