log_event.cc 248 KB
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/* Copyright (C) 2000-2004 MySQL AB
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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 */


#ifndef MYSQL_CLIENT
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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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/*
  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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/*
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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, char* str, int len)
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{
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  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, struct st_relay_log_info *rli)
{
  thd->query_error = 0;
  thd->clear_error();
  *rli->last_slave_error = 0;
  rli->last_slave_errno = 0;
}

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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, char *str, int len)
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{
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  char *end= str + len;
  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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/*
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  Creates a temporary name for load data infile:

  SYNOPSIS
    slave_load_file_stem()
    buf		      Store new filename here
    file_id	      File_id (part of file name)
    event_server_id   Event_id (part of file name)
    ext		      Extension for file name

  RETURN
    Pointer to start of extension
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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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,"SQL_LOAD-",slave_load_tmpdir, "", MY_UNPACK_FILENAME);
  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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/*
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  Delete all temporary files used for SQL_LOAD.

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  SYNOPSIS
    cleanup_load_tmpdir()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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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("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, char *str, uint length)
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{
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  byte tmp[1];
  tmp[0]= (byte) length;
  return (my_b_safe_write(file, tmp, sizeof(tmp)) ||
	  my_b_safe_write(file, (byte*) 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,
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			   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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/*
  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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/*
  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.
 */
#ifndef MYSQL_CLIENT
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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/*
  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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/*
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  Log_event::get_type_str()
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*/
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const char* Log_event::get_type_str()
{
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  switch(get_type_code()) {
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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";
  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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/*
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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;
  when=		time(NULL);
  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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  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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      */
    log_pos+= uint4korr(buf + EVENT_LEN_OFFSET);
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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)
555
    rli->stmt_done(log_pos, when);
556

557 558
  return 0;                                   // Cannot fail currently
}
559

560 561

Log_event::enum_skip_reason
562 563 564 565 566 567 568 569 570 571
Log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  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));
  if (server_id == ::server_id && !rli->replicate_same_server_id)
    return EVENT_SKIP_IGNORE;
572 573 574
  else if (rli->slave_skip_counter > 0)
    return EVENT_SKIP_COUNT;
  else
575
    return EVENT_SKIP_NOT;
576
}
577

578

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/*
580
  Log_event::pack_info()
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*/
582

583
void Log_event::pack_info(Protocol *protocol)
584
{
585
  protocol->store("", &my_charset_bin);
586 587 588
}


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/*
590
  Log_event::net_send()
591

592
  Only called by SHOW BINLOG EVENTS
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*/
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595
int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos)
596
{
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  const char *p= strrchr(log_name, FN_LIBCHAR);
  const char *event_type;
599 600 601
  if (p)
    log_name = p + 1;
  
602
  protocol->prepare_for_resend();
603
  protocol->store(log_name, &my_charset_bin);
604
  protocol->store((ulonglong) pos);
605
  event_type = get_type_str();
606
  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();
611
}
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#endif /* HAVE_REPLICATION */


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/*
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  Log_event::init_show_field_list()
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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));
622
  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));
627 628
  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));
}

633

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/*
635
  Log_event::write()
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*/
637

638
bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
640 641
  byte header[LOG_EVENT_HEADER_LEN];
  DBUG_ENTER("Log_event::write_header");
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643 644
  /* Store number of bytes that will be written by this event */
  data_written= event_data_length + sizeof(header);
645

646 647 648 649
  /*
    log_pos != 0 if this is relay-log event. In this case we should not
    change the position
  */
650

651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
  if (is_artificial_event())
  {
    /*
      We should not do any cleanup on slave when reading this. We
      mark this by setting log_pos to 0.  Start_log_event_v3() will
      detect this on reading and set artificial_event=1 for the event.
    */
    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;
  }

  /*
    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).
  */

  int4store(header, (ulong) when);              // timestamp
  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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/*
710
  Log_event::read_log_event()
711 712 713 714

  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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*/
716

717
int Log_event::read_log_event(IO_CACHE* file, String* packet,
718
			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
721
  int result=0;
722
  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
723
  DBUG_ENTER("Log_event::read_log_event");
724

725
  if (log_lock)
726
    pthread_mutex_lock(log_lock);
727 728
  if (my_b_read(file, (byte*) buf, sizeof(buf)))
  {
729 730 731 732 733
    /*
      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.
    */
734
    DBUG_PRINT("error",("file->error: %d", file->error));
735 736 737
    if (!file->error)
      result= LOG_READ_EOF;
    else
738
      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
739
    goto end;
740
  }
741
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
742
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
743
      data_len > current_thd->variables.max_allowed_packet)
744
  {
745
    DBUG_PRINT("error",("data_len: %ld", data_len));
746
    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
747 748
	     LOG_READ_TOO_LARGE);
    goto end;
749
  }
750 751 752 753 754 755 756 757

  /* Append the log event header to packet */
  if (packet->append(buf, sizeof(buf)))
  {
    /* Failed to allocate packet */
    result= LOG_READ_MEM;
    goto end;
  }
758
  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
759 760
  if (data_len)
  {
761
    /* Append rest of event, read directly from file into packet */
762
    if (packet->append(file, data_len))
763
    {
764
      /*
765 766 767 768 769 770 771 772 773 774
        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)
775
      */
776 777
      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
778
      /* Implicit goto end; */
779
    }
780
  }
781 782 783 784

end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
785
  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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789
#ifndef MYSQL_CLIENT
790 791
#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
792
#else
793
#define UNLOCK_MUTEX
794 795 796
#define LOCK_MUTEX
#endif

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/*
798 799
  Log_event::read_log_event()

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  NOTE:
801
    Allocates memory;  The caller is responsible for clean-up.
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*/
803

804
#ifndef MYSQL_CLIENT
805 806
Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
807
                                     const Format_description_log_event *description_event)
808
#else
809 810
Log_event* Log_event::read_log_event(IO_CACHE* file,
                                     const Format_description_log_event *description_event)
811
#endif
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{
813
  DBUG_ENTER("Log_event::read_log_event");
814
  DBUG_ASSERT(description_event != 0);
815 816 817 818 819
  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
820 821
    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
822 823 824
  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
825

826
  LOCK_MUTEX;
827
  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
828
  if (my_b_read(file, (byte *) head, header_size))
829
  {
830 831
    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
833
    /*
834 835 836
      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.
837
    */
838
    DBUG_RETURN(0);
839
  }
840
  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
841 842 843
  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;
844 845
#ifndef max_allowed_packet
  THD *thd=current_thd;
846
  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
847
#endif
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849
  if (data_len > max_allowed_packet)
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  {
851 852
    error = "Event too big";
    goto err;
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  }

855
  if (data_len < header_size)
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  {
857 858
    error = "Event too small";
    goto err;
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  }
860 861 862

  // some events use the extra byte to null-terminate strings
  if (!(buf = my_malloc(data_len+1, MYF(MY_WME))))
863 864 865
  {
    error = "Out of memory";
    goto err;
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  }
867
  buf[data_len] = 0;
868
  memcpy(buf, head, header_size);
869
  if (my_b_read(file, (byte*) buf + header_size, data_len - header_size))
870 871 872 873
  {
    error = "read error";
    goto err;
  }
874
  if ((res= read_log_event(buf, data_len, &error, description_event)))
875
    res->register_temp_buf(buf);
876

877
err:
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  UNLOCK_MUTEX;
879
  if (!res)
880
  {
881
    DBUG_ASSERT(error != 0);
882 883
    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
884
		    error,data_len,head[EVENT_TYPE_OFFSET]);
885
    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;
895
  }
896
  DBUG_RETURN(res);
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}

899

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/*
901
  Log_event::read_log_event()
902 903
  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
905

906 907 908
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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{
910 911
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
912
  DBUG_ASSERT(description_event != 0);
913
  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
914
  if (event_len < EVENT_LEN_OFFSET ||
915 916 917
      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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918
    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
919
  }
920

921 922 923
  /* To check the integrity of the Log_event_type enumeration */
  DBUG_ASSERT(buf[EVENT_TYPE_OFFSET] < ENUM_END_EVENT);

924
  switch(buf[EVENT_TYPE_OFFSET]) {
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  case QUERY_EVENT:
926
    ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
927
    break;
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  case LOAD_EVENT:
929
    ev = new Load_log_event(buf, event_len, description_event);
930
    break;
931
  case NEW_LOAD_EVENT:
932
    ev = new Load_log_event(buf, event_len, description_event);
933
    break;
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  case ROTATE_EVENT:
935
    ev = new Rotate_log_event(buf, event_len, description_event);
936
    break;
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#ifdef HAVE_REPLICATION
938
  case SLAVE_EVENT: /* can never happen (unused event) */
939 940
    ev = new Slave_log_event(buf, event_len);
    break;
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#endif /* HAVE_REPLICATION */
942
  case CREATE_FILE_EVENT:
943
    ev = new Create_file_log_event(buf, event_len, description_event);
944 945
    break;
  case APPEND_BLOCK_EVENT:
946
    ev = new Append_block_log_event(buf, event_len, description_event);
947 948
    break;
  case DELETE_FILE_EVENT:
949
    ev = new Delete_file_log_event(buf, event_len, description_event);
950 951
    break;
  case EXEC_LOAD_EVENT:
952
    ev = new Execute_load_log_event(buf, event_len, description_event);
953
    break;
954 955
  case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
    ev = new Start_log_event_v3(buf, description_event);
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    break;
  case STOP_EVENT:
958
    ev = new Stop_log_event(buf, description_event);
959 960
    break;
  case INTVAR_EVENT:
961
    ev = new Intvar_log_event(buf, description_event);
962
    break;
963 964 965
  case XID_EVENT:
    ev = new Xid_log_event(buf, description_event);
    break;
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  case RAND_EVENT:
967
    ev = new Rand_log_event(buf, description_event);
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    break;
969
  case USER_VAR_EVENT:
970 971 972 973
    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); 
974
    break;
975
#if defined(HAVE_REPLICATION) 
976 977 978 979 980 981 982 983 984
  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;
985 986 987 988 989 990 991 992 993 994 995 996 997
  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;
#endif
998 999 1000 1001
  case BEGIN_LOAD_QUERY_EVENT:
    ev = new Begin_load_query_log_event(buf, event_len, description_event);
    break;
  case EXECUTE_LOAD_QUERY_EVENT:
1002 1003 1004 1005
    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);
1006
    break;
1007
  default:
1008 1009
    DBUG_PRINT("error",("Unknown event code: %d",
                        (int) buf[EVENT_TYPE_OFFSET]));
1010
    ev= NULL;
1011
    break;
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1012
  }
1013

1014 1015 1016 1017
  DBUG_PRINT("read_event", ("%s(type_code: %d; event_len: %d)",
                            ev ? ev->get_type_str() : "<unknown>",
                            buf[EVENT_TYPE_OFFSET],
                            event_len));
1018
  /*
1019 1020 1021 1022 1023 1024 1025
    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'.
1026
  */
1027
  if (!ev || !ev->is_valid())
1028
  {
1029 1030
    DBUG_PRINT("error",("Found invalid event in binary log"));

1031
    delete ev;
1032
#ifdef MYSQL_CLIENT
1033
    if (!force_opt) /* then mysqlbinlog dies */
1034 1035
    {
      *error= "Found invalid event in binary log";
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1036
      DBUG_RETURN(0);
1037
    }
1038
    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);
1042
#endif
1043
  }
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  DBUG_RETURN(ev);  
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}

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#ifdef MYSQL_CLIENT
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/*
1050
  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)))
1056
{
1057
  char llbuff[22];
1058
  my_off_t hexdump_from= print_event_info->hexdump_from;
1059
  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 %d  end_log_pos %s ", server_id,
              llstr(log_pos,llbuff));
1065

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  /* mysqlbinlog --hexdump */
1067
  if (print_event_info->hexdump_from)
1068
  {
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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);
      DBUG_ASSERT(static_cast<my_size_t>(bytes_written) < sizeof(emit_buf));
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      my_b_write(file, (byte*) 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;
1108

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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);
        DBUG_ASSERT(static_cast<my_size_t>(bytes_written) < sizeof(emit_buf));
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	my_b_write(file, (byte*) emit_buf, bytes_written);
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	hex_string[0]= 0;
	char_string[0]= 0;
	c= char_string;
	h= hex_string;
1132
      }
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      else if (i % 8 == 7) *h++ = ' ';
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    }
1135
    *c= '\0';
1136

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    /* Non-full last line */
1138
    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);
      DBUG_ASSERT(static_cast<my_size_t>(bytes_written) < sizeof(emit_buf));
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      my_b_write(file, (byte*) 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 byte*>("# "), 2);
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  }
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  DBUG_VOID_RETURN;
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}

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void Log_event::print_base64(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool more)
1163
{
1164
  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 (my_b_tell(file) == 0)
    my_b_printf(file, "\nBINLOG '\n");

  my_b_printf(file, "%s\n", tmp_str);

  if (!more)
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    my_b_printf(file, "'%s\n", print_event_info->delimiter);
1188

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  my_free(tmp_str, MYF(0));
1190
  DBUG_VOID_RETURN;
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}


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/*
1195
  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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/**************************************************************************
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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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  Query_log_event::pack_info()
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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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*/
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void Query_log_event::pack_info(Protocol *protocol)
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{
1240
  // TODO: show the catalog ??
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  char *buf, *pos;
  if (!(buf= my_malloc(9 + db_len + q_len, MYF(MY_WME))))
    return;
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  pos= buf;
  if (!(flags & LOG_EVENT_SUPPRESS_USE_F)
1246
      && db && db_len)
1247
  {
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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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  }
1252
  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);
1258
  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 */
static void write_str_with_code_and_len(char **dst, const char *src,
                                        int len, uint code)
{
  DBUG_ASSERT(src);
  *((*dst)++)= code;
  *((*dst)++)= (uchar) len;
  bmove(*dst, src, len);
  (*dst)+= len;
}


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/*
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  Query_log_event::write()
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  NOTES:
    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+
            1+4+           // code of flags2 and flags2
            1+8+           // code of sql_mode and sql_mode
            1+1+FN_REFLEN+ // code of catalog and catalog length and catalog
            1+4+           // code of autoinc and the 2 autoinc variables
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            1+6+           // code of charset and charset
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            1+1+MAX_TIME_ZONE_NAME_LENGTH+ // code of tz and tz length and tz name
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            1+2+           // code of lc_time_names and lc_time_names_number
            1+2            // code of charset_database and charset_database_number
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            ], *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.
1307
    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)
  {
1358
    *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)
1363
  {
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    write_str_with_code_and_len((char **)(&start),
                                catalog, catalog_len, Q_CATALOG_NZ_CODE);
1366
    /*
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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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    */
  }
  if (auto_increment_increment != 1)
  {
    *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);
    *start++= Q_TIME_ZONE_CODE;
    *start++= time_zone_len;
    memcpy(start, time_zone_str, time_zone_len);
    start+= time_zone_len;
  }
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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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  /*
    Here there could be code like
1423
    if (command-line-option-which-says-"log_this_variable" && inited)
1424
    {
1425
    *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);
1433
  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
  */
1440
  event_length= (uint) (start-buf) + get_post_header_size_for_derived() + db_len + 1 + q_len;
1441 1442

  return (write_header(file, event_length) ||
1443 1444 1445 1446
          my_b_safe_write(file, (byte*) buf, QUERY_HEADER_LEN) ||
          write_post_header_for_derived(file) ||
          my_b_safe_write(file, (byte*) start_of_status,
                          (uint) (start-start_of_status)) ||
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          my_b_safe_write(file, (db) ? (byte*) db : (byte*)"", db_len + 1) ||
          my_b_safe_write(file, (byte*) query, q_len)) ? 1 : 0;
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}

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/*
  Query_log_event::Query_log_event()
 
  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()
      thd               - thread handle
      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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*/
1481
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
1482
				 ulong query_length, bool using_trans,
1483
				 bool suppress_use, THD::killed_state killed_status_arg)
1484
  :Log_event(thd_arg,
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	     ((thd_arg->tmp_table_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0)
	      | (suppress_use          ? LOG_EVENT_SUPPRESS_USE_F    : 0)),
	     using_trans),
1488
   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
1489
   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),
1493
   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),
   charset_database_number(0)
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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=
    (killed_status_arg == THD::NOT_KILLED) ? thd_arg->net.last_errno :
    ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ? 0 :
     thd->killed_errno());
  
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  time(&end_time);
  exec_time = (ulong) (end_time  - thd->start_time);
1511
  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
1512
  /* status_vars_len is set just before writing the event */
1513
  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
    thd->options, it would be more efficient to flags2=thd_arg->options
    (OPTIONS_WRITTEN_TO_BINLOG would be used only at reading time).
    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 &.
  */
1524
  flags2= (uint32) (thd_arg->options & OPTIONS_WRITTEN_TO_BIN_LOG);
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  DBUG_ASSERT(thd->variables.character_set_client->number < 256*256);
  DBUG_ASSERT(thd->variables.collation_connection->number < 256*256);
  DBUG_ASSERT(thd->variables.collation_server->number < 256*256);
  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;
1543 1544
  DBUG_PRINT("info",("Query_log_event has flags2: %lu  sql_mode: %lu",
                     (ulong) flags2, sql_mode));
1545
}
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1546
#endif /* MYSQL_CLIENT */
1547

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1548

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/* 2 utility functions for the next method */

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/* 
  Get the pointer for a string (src) that contains the length in
  the first byte. Set the output string (dst) to the string value
  and place the length of the string in the byte after the string.
*/
static void get_str_len_and_pointer(const Log_event::Byte **src, 
                                    const char **dst, 
                                    uint *len)
1559 1560
{
  if ((*len= **src))
1561 1562
    *dst= (char *)*src + 1;                          // Will be copied later
  (*src)+= *len + 1;
1563 1564
}

1565 1566 1567
static void copy_str_and_move(const char **src, 
                              Log_event::Byte **dst, 
                              uint len)
1568 1569
{
  memcpy(*dst, *src, len);
1570
  *src= (const char *)*dst;
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  (*dst)+= len;
  *(*dst)++= 0;
}

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/*
1576
  Query_log_event::Query_log_event()
1577
  This is used by the SQL slave thread to prepare the event before execution.
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*/
1579

1580
Query_log_event::Query_log_event(const char* buf, uint event_len,
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                                 const Format_description_log_event *description_event,
                                 Log_event_type event_type)
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  :Log_event(buf, description_event), data_buf(0), query(NullS),
1584
   db(NullS), catalog_len(0), status_vars_len(0),
1585
   flags2_inited(0), sql_mode_inited(0), charset_inited(0),
1586
   auto_increment_increment(1), auto_increment_offset(1),
1587
   time_zone_len(0), lc_time_names_number(0), charset_database_number(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;
1594
  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;
1598
  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)
1624
  {
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    status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
    data_len-= status_vars_len;
    DBUG_PRINT("info", ("Query_log_event has status_vars_len: %u",
                        (uint) status_vars_len));
    tmp-= 2;
1630
  }
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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;)
1642
  {
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    switch (*pos++) {
    case Q_FLAGS2_CODE:
      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
      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;
    }
1662
    case Q_CATALOG_NZ_CODE:
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      get_str_len_and_pointer(&pos, &catalog, &catalog_len);
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      break;
    case Q_AUTO_INCREMENT:
      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
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    case Q_CHARSET_CODE:
    {
      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
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    case Q_TIME_ZONE_CODE:
    {
1679
      get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len);
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      break;
    }
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    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
      if ((catalog_len= *pos))
        catalog= (char*) pos+1;                           // Will be copied later
      pos+= catalog_len+2; // leap over end 0
      catalog_nz= 0; // catalog has end 0 in event
      break;
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    case Q_LC_TIME_NAMES_CODE:
      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
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    case Q_CHARSET_DATABASE_CODE:
      charset_database_number= uint2korr(pos);
      pos+= 2;
      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)));
1700
      pos= (const uchar*) end;                         // Break loop
1701
    }
1702
  }
1703
  
1704
#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))))
1711
#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))))
1716
#endif
1717
      DBUG_VOID_RETURN;
1718
  if (catalog_len)                                  // If catalog is given
1719
  {
1720
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1721
      copy_str_and_move(&catalog, &start, catalog_len);
1722 1723 1724
    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
1725
      catalog= (const char *)start;
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      start+= catalog_len+1;
    }
1728
  }
1729
  if (time_zone_len)
1730
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
1731

1732
  /* A 2nd variable part; this is common to all versions */ 
1733
  memcpy((char*) start, end, data_len);          // Copy db and query
1734
  start[data_len]= '\0';              // End query with \0 (For safetly)
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  db= (char *)start;
  query= (char *)(start + db_len + 1);
1737 1738
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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1739 1740
}

1741

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1742
/*
1743
  Query_log_event::print()
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1744
*/
1745

1746
#ifdef MYSQL_CLIENT
1747
void Query_log_event::print_query_header(IO_CACHE* file,
1748
					 PRINT_EVENT_INFO* print_event_info)
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{
1750
  // TODO: print the catalog ??
1751
  char buff[40],*end;				// Enough for SET TIMESTAMP
1752 1753 1754
  bool different_db= 1;
  uint32 tmp;

1755
  if (!print_event_info->short_form)
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  {
1757 1758 1759 1760
    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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1763
  if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db)
1764
  {
1765 1766
    if (different_db= memcmp(print_event_info->db, db, db_len + 1))
      memcpy(print_event_info->db, db, db_len + 1);
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    if (db[0] && different_db) 
1768
      my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
1769
  }
1770

1771
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
1772
  end= strmov(end, print_event_info->delimiter);
1773
  *end++='\n';
1774
  my_b_write(file, (byte*) buff, (uint) (end-buff));
1775
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(file,"SET @@session.pseudo_thread_id=%lu%s\n",
                (ulong)thread_id, print_event_info->delimiter);
1778

1779
  /*
1780 1781 1782
    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. */
1787
    if (likely(print_event_info->flags2_inited)) 
1788
      /* All bits which have changed */
1789
      tmp= (print_event_info->flags2) ^ flags2;
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    else /* that's the first Query event we read */
    {
1792
      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;
1799
      my_b_printf(file, "SET ");
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      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
                   "@@session.foreign_key_checks", &need_comma);
      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
                   "@@session.sql_auto_is_null", &need_comma);
      print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
                   "@@session.unique_checks", &need_comma);
1806
      my_b_printf(file,"%s\n", print_event_info->delimiter);
1807
      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.
1822 1823 1824 1825
  */

  if (likely(sql_mode_inited))
  {
1826
    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
1827
    {
1828
      print_event_info->sql_mode_inited= 1;
1829
      /* force a difference to force write */
1830
      print_event_info->sql_mode= ~sql_mode;
1831
    }
1832
    if (unlikely(print_event_info->sql_mode != sql_mode))
1833
    {
1834 1835
      my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
                  (ulong)sql_mode, print_event_info->delimiter);
1836
      print_event_info->sql_mode= sql_mode;
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    }
  }
1839 1840
  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
1841
  {
1842 1843 1844
    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);
1845 1846
    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
1847 1848
  }

1849 1850
  /* TODO: print the catalog when we feature SET CATALOG */

1851 1852
  if (likely(charset_inited))
  {
1853
    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
1854
    {
1855 1856
      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
1857
    }
1858
    if (unlikely(bcmp(print_event_info->charset, charset, 6)))
1859
    {
1860 1861 1862
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
1863
        /* for mysql client */
1864 1865
        my_b_printf(file, "/*!\\C %s */%s\n",
                    cs_info->csname, print_event_info->delimiter);
1866
      }
1867 1868 1869 1870
      my_b_printf(file,"SET "
                  "@@session.character_set_client=%d,"
                  "@@session.collation_connection=%d,"
                  "@@session.collation_server=%d"
1871
                  "%s\n",
1872 1873
                  uint2korr(charset),
                  uint2korr(charset+2),
1874 1875
                  uint2korr(charset+4),
                  print_event_info->delimiter);
1876
      memcpy(print_event_info->charset, charset, 6);
1877 1878
    }
  }
1879 1880
  if (time_zone_len)
  {
1881
    if (bcmp(print_event_info->time_zone_str, time_zone_str, time_zone_len+1))
1882
    {
1883 1884
      my_b_printf(file,"SET @@session.time_zone='%s'%s\n",
                  time_zone_str, print_event_info->delimiter);
1885
      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
1886 1887
    }
  }
1888 1889
  if (lc_time_names_number != print_event_info->lc_time_names_number)
  {
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1890 1891
    my_b_printf(file, "SET @@session.lc_time_names=%d%s\n",
                lc_time_names_number, print_event_info->delimiter);
1892 1893
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
1894 1895 1896
  if (charset_database_number != print_event_info->charset_database_number)
  {
    if (charset_database_number)
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1897 1898
      my_b_printf(file, "SET @@session.collation_database=%d%s\n",
                  charset_database_number, print_event_info->delimiter);
1899
    else
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1900 1901
      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
1902 1903
    print_event_info->charset_database_number= charset_database_number;
  }
1904 1905
}

1906

1907
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
1908
{
1909 1910 1911 1912
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
  my_b_write(&cache, (byte*) query, q_len);
1913
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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}
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1915
#endif /* MYSQL_CLIENT */
1916

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1917

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1918
/*
1919
  Query_log_event::do_apply_event()
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1920
*/
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1921

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1923

1924
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
1925
{
1926
  return do_apply_event(rli, query, q_len);
1927 1928 1929
}


1930
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli,
1931
                                      const char *query_arg, uint32 q_len_arg)
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1932
{
1933
  LEX_STRING new_db;
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1934
  int expected_error,actual_error= 0;
1935
  /*
1936 1937 1938
    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
1939
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
1940
    you.
1941
  */
1942
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
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  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' */
1946 1947
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1948

1949
  /*
1950 1951 1952 1953 1954 1955 1956 1957
    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.
1958
  */
1959
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
1960 1961
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

1962 1963
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
  const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
1964

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1965 1966 1967 1968 1969 1970 1971
  /*
    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
1972
            ::do_apply_event(), then the companion SET also have so
1973
            we don't need to reset_one_shot_variables().
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1974
  */
1975
  if (rpl_filter->db_ok(thd->db))
1976 1977
  {
    thd->set_time((time_t)when);
1978 1979
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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1980
    VOID(pthread_mutex_lock(&LOCK_thread_count));
1981
    thd->query_id = next_query_id();
1982
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
1983
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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1984
    DBUG_PRINT("query",("%s",thd->query));
1985

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1986
    if (ignored_error_code((expected_error= error_code)) ||
1987
	!check_expected_error(thd,rli,expected_error))
1988 1989 1990
    {
      if (flags2_inited)
        /*
1991 1992
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
1993
        */
1994
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
1995 1996
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
1997 1998
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
1999 2000 2001 2002 2003
      */
      /*
        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
2004 2005 2006
        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).
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
      */
      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))))
          {
            /*
2025 2026 2027 2028
              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).
2029
            */
2030
            set_slave_thread_default_charset(thd, rli);
2031 2032 2033 2034 2035
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
2036 2037 2038
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
2039
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
2040 2041 2042 2043 2044 2045
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058
      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;
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
      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;
      
2074
      /* Execute the query (note that we bypass dispatch_command()) */
2075 2076
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
2077 2078

    }
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2079 2080
    else
    {
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2081
      /*
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2082 2083 2084 2085 2086
        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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2087
      */
2088
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
2089
        clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli)); /* Can ignore query */
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2090
      else
2091
      {
2092
        slave_print_msg(ERROR_LEVEL, rli, expected_error, 
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2093
                          "\
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2094
Query partially completed on the master (error on master: %d) \
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2095 2096 2097
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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2098
START SLAVE; . Query: '%s'", expected_error, thd->query);
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2099 2100 2101 2102
        thd->query_error= 1;
      }
      goto end;
    }
2103

2104 2105
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
2106
      general_log_print(thd, COM_QUERY, "%s", thd->query);
2107

2108
compare_errors:
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2109 2110

     /*
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2111 2112 2113 2114
      If we expected a non-zero error code, and we don't get the same error
      code, and none of them should be ignored.
    */
    DBUG_PRINT("info",("expected_error: %d  last_errno: %d",
2115
 		       expected_error, thd->net.last_errno));
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2116
    if ((expected_error != (actual_error= thd->net.last_errno)) &&
2117 2118 2119
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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2120
    {
2121 2122 2123
      slave_print_msg(ERROR_LEVEL, rli, 0,
                      "\
Query caused different errors on master and slave.     \
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2124
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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2125
Default database: '%s'. Query: '%s'",
2126 2127 2128 2129 2130
                      ER_SAFE(expected_error),
                      expected_error,
                      actual_error ? thd->net.last_error: "no error",
                      actual_error,
                      print_slave_db_safe(db), query_arg);
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2131 2132 2133 2134 2135 2136
      thd->query_error= 1;
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
2137
 	     ignored_error_code(actual_error))
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2138 2139
    {
      DBUG_PRINT("info",("error ignored"));
2140
      clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
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2141 2142 2143
    }
    /*
      Other cases: mostly we expected no error and get one.
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2144
    */
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2145 2146
    else if (thd->query_error || thd->is_fatal_error)
    {
2147 2148 2149 2150 2151
      slave_print_msg(ERROR_LEVEL, rli, actual_error,
                      "Error '%s' on query. Default database: '%s'. Query: '%s'",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"),
                      print_slave_db_safe(thd->db), query_arg);
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2152 2153
      thd->query_error= 1;
    }
2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167

    /*
      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, ...);
      thd->query_error = 1;
      }
      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...
2168

2169 2170 2171 2172 2173 2174 2175
      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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2176 2177
  } /* End of if (db_ok(... */

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2178
end:
2179
  VOID(pthread_mutex_lock(&LOCK_thread_count));
2180 2181 2182 2183 2184 2185
  /*
    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
2186 2187 2188
    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.
2189
  */
2190
  thd->catalog= 0;
2191
  thd->set_db(NULL, 0);                 /* will free the current database */
2192
  thd->query= 0;			// just to be sure
2193
  thd->query_length= 0;
2194
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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2195
  close_thread_tables(thd);      
2196 2197 2198 2199 2200 2201 2202 2203 2204 2205
  /*
    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;
2206
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
2207 2208 2209 2210 2211
  return thd->query_error;
}

int Query_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
2212
  /*
2213 2214 2215
    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.
2216
  */
2217 2218 2219 2220 2221 2222 2223
  if (thd->one_shot_set)
  {
    rli->inc_event_relay_log_pos();
    return 0;
  }
  else
    return Log_event::do_update_pos(rli);
2224
}
2225 2226


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2227
#endif
2228

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2229

2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
/**************************************************************************
	Muted_query_log_event methods
**************************************************************************/

#ifndef MYSQL_CLIENT
/*
  Muted_query_log_event::Muted_query_log_event()
*/
Muted_query_log_event::Muted_query_log_event()
  :Query_log_event()
{
}
#endif


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2245
/**************************************************************************
2246
	Start_log_event_v3 methods
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2247
**************************************************************************/
2248

2249 2250 2251 2252 2253 2254 2255 2256
#ifndef MYSQL_CLIENT
Start_log_event_v3::Start_log_event_v3() :Log_event(), binlog_version(BINLOG_VERSION), artificial_event(0)
{
  created= when;
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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2257
/*
2258
  Start_log_event_v3::pack_info()
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2259
*/
2260

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2262
void Start_log_event_v3::pack_info(Protocol *protocol)
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2263
{
2264 2265 2266 2267
  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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2268 2269
  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
2272 2273


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2274
/*
2275
  Start_log_event_v3::print()
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2276
*/
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2277 2278

#ifdef MYSQL_CLIENT
2279
void Start_log_event_v3::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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2280
{
2281 2282 2283 2284 2285
  DBUG_ENTER("Start_log_event_v3::print");

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

2286
  if (!print_event_info->short_form)
2287
  {
2288 2289 2290 2291
    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);
2292
    if (created)
2293 2294
      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
2295
    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
2296 2297
      my_b_printf(&cache, "# Warning: this binlog was not closed properly. "
                  "Most probably mysqld crashed writing it.\n");
2298
  }
2299 2300
  if (!artificial_event && created)
  {
2301
#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
2302 2303 2304 2305 2306 2307
    /*
      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).
    */
2308
    my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
2309
#else
2310
    my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
2311
#endif
2312
  }
2313
  DBUG_VOID_RETURN;
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2314
}
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2315
#endif /* MYSQL_CLIENT */
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2316

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2317
/*
2318
  Start_log_event_v3::Start_log_event_v3()
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2319
*/
2320

2321 2322 2323
Start_log_event_v3::Start_log_event_v3(const char* buf,
                                       const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
2324
{
2325 2326
  buf+= description_event->common_header_len;
  binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
2327 2328
  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
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2329 2330
  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
2331 2332 2333
  created= uint4korr(buf+ST_CREATED_OFFSET);
  /* We use log_pos to mark if this was an artificial event or not */
  artificial_event= (log_pos == 0);
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2334 2335
}

2336

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2337
/*
2338
  Start_log_event_v3::write()
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2339
*/
2340

2341
#ifndef MYSQL_CLIENT
2342
bool Start_log_event_v3::write(IO_CACHE* file)
2343
{
2344
  char buff[START_V3_HEADER_LEN];
2345 2346 2347
  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy(buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
  int4store(buff + ST_CREATED_OFFSET,created);
2348 2349
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, (byte*) buff, sizeof(buff)));
2350
}
2351
#endif
2352

2353

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2354
/*
2355
  Start_log_event_v3::do_apply_event()
2356 2357 2358 2359

  The master started

  IMPLEMENTATION
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2360 2361 2362 2363
    - To handle the case where the master died without having time to write
      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).
2364 2365

  TODO
2366 2367 2368 2369 2370
    - Remove all active user locks.
      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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2371 2372
*/

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2373
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2374
int Start_log_event_v3::do_apply_event(RELAY_LOG_INFO const *rli)
2375
{
2376
  DBUG_ENTER("Start_log_event_v3::do_apply_event");
2377
  switch (binlog_version)
2378 2379 2380 2381 2382 2383 2384 2385
  {
  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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2386
    */
2387 2388 2389 2390 2391
    if (created)
    {
      close_temporary_tables(thd);
      cleanup_load_tmpdir();
    }
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2392 2393
    break;

2394
    /*
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2395 2396
       Now the older formats; in that case load_tmpdir is cleaned up by the I/O
       thread.
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2397
    */
2398
  case 1:
2399
    if (strncmp(rli->relay_log.description_event_for_exec->server_version,
2400 2401 2402 2403 2404 2405 2406 2407
                "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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2408
    /*
2409 2410 2411
      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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2412 2413 2414 2415
    */
    break;
  default:
    /* this case is impossible */
2416
    DBUG_RETURN(1);
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2417
  }
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  DBUG_RETURN(0);
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
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/***************************************************************************
       Format_description_log_event methods
****************************************************************************/

/*
  Format_description_log_event 1st ctor.

  SYNOPSIS
    Format_description_log_event::Format_description_log_event
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      binlog_version              the binlog version for which we want to build
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                                  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.

  DESCRIPTION
    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.
*/

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()
{
  created= when;
  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(MY_ZEROFILL));
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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)
    {
      post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
      post_header_len[QUERY_EVENT-1]= QUERY_HEADER_LEN;
      post_header_len[ROTATE_EVENT-1]= ROTATE_HEADER_LEN;
      post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
      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[FORMAT_DESCRIPTION_EVENT-1]= FORMAT_DESCRIPTION_HEADER_LEN;
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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[BEGIN_LOAD_QUERY_EVENT-1]= post_header_len[APPEND_BLOCK_EVENT-1];
      post_header_len[EXECUTE_LOAD_QUERY_EVENT-1]= EXECUTE_LOAD_QUERY_HEADER_LEN;
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      post_header_len[INCIDENT_EVENT-1]= INCIDENT_HEADER_LEN;
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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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}


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

Format_description_log_event::
Format_description_log_event(const char* buf,
                             uint event_len,
                             const
                             Format_description_log_event*
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                             description_event)
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  :Start_log_event_v3(buf, description_event)
{
  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() */
  post_header_len= (uint8*) my_memdup((byte*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
                                      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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  DBUG_VOID_RETURN;
}

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#ifndef MYSQL_CLIENT
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bool Format_description_log_event::write(IO_CACHE* file)
{
  /*
    We don't call Start_log_event_v3::write() because this would make 2
    my_b_safe_write().
  */
  byte buff[FORMAT_DESCRIPTION_HEADER_LEN];
  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
  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, (byte*) post_header_len,
         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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int Format_description_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
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  DBUG_ENTER("Format_description_log_event::do_apply_event");
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#ifdef USING_TRANSACTIONS
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  /*
    As a transaction NEVER spans on 2 or more binlogs:
    if we have an active transaction at this point, the master died
    while writing the transaction to the binary log, i.e. while
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    flushing the binlog cache to the binlog. XA guarantees that master has
    rolled back. So we roll back.
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    Note: this event could be sent by the master to inform us of the
    format of its binlog; in other words maybe it is not at its
    original place when it comes to us; we'll know this by checking
    log_pos ("artificial" events have log_pos == 0).
  */
  if (!artificial_event && created && thd->transaction.all.nht)
  {
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    /* This is not an error (XA is safe), just an information */
    slave_print_msg(INFORMATION_LEVEL, rli, 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
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    perform, we don't call Start_log_event_v3::do_apply_event()
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    (this was just to update the log's description event).
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  */
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  if (server_id != (uint32) ::server_id)
  {
    /*
      If the event was not requested by the slave i.e. the master sent
      it while the slave asked for a position >4, the event will make
      rli->group_master_log_pos advance. Say that the slave asked for
      position 1000, and the Format_desc event's end is 96. Then in
      the beginning of replication rli->group_master_log_pos will be
      0, then 96, then jump to first really asked event (which is
      >96). So this is ok.
    */
    DBUG_RETURN(Start_log_event_v3::do_apply_event(rli));
  }
  DBUG_RETURN(0);
}

int Format_description_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
  /* 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;
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  }
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  else
  {
    return Log_event::do_update_pos(rli);
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  }
}

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Log_event::enum_skip_reason
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Format_description_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
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{
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  return Log_event::EVENT_SKIP_NOT;
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}
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#endif

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


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  /**************************************************************************
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        Load_log_event methods
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   General note about Load_log_event: the binlogging of LOAD DATA INFILE is
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   going to be changed in 5.0 (or maybe in 5.1; not decided yet).
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   However, the 5.0 slave could still have to read such events (from a 4.x
   master), convert them (which just means maybe expand the header, when 5.0
   servers have a UID in events) (remember that whatever is after the header
   will be like in 4.x, as this event's format is not modified in 5.0 as we
   will use new types of events to log the new LOAD DATA INFILE features).
   To be able to read/convert, we just need to not assume that the common
   header is of length LOG_EVENT_HEADER_LEN (we must use the description
   event).
   Note that I (Guilhem) manually tested replication of a big LOAD DATA INFILE
   between 3.23 and 5.0, and between 4.0 and 5.0, and it works fine (and the
   positions displayed in SHOW SLAVE STATUS then are fine too).
  **************************************************************************/
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/*
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  Load_log_event::pack_info()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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uint Load_log_event::get_query_buffer_length()
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{
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  return
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    5 + db_len + 3 +                        // "use DB; "
    18 + fname_len + 2 +                    // "LOAD DATA INFILE 'file''"
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    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'"
    21 + sql_ex.line_term_len*4 + 2 +       // " FIELDS 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)
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  {
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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 */
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  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);
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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);
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  if (sql_ex.line_start_len)
  {
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    pos= strmov(pos, " STARTING BY ");
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    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
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  }
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  if ((long) skip_lines > 0)
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  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
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    pos= strmov(pos," LINES ");    
  }
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  if (num_fields)
  {
    uint i;
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    const char *field= fields;
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    pos= strmov(pos, " (");
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    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
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      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
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    }
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    *pos++= ')';
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  }
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  *end= pos;
}


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

  if (!(buf= my_malloc(get_query_buffer_length(), MYF(MY_WME))))
    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));
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
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#ifndef MYSQL_CLIENT

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/*
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  Load_log_event::write_data_header()
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*/
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bool Load_log_event::write_data_header(IO_CACHE* file)
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{
2875
  char buf[LOAD_HEADER_LEN];
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2876
  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
2877 2878 2879 2880 2881
  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);
2882
  return my_b_safe_write(file, (byte*)buf, LOAD_HEADER_LEN) != 0;
2883
}
2884

2885

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2886
/*
2887
  Load_log_event::write_data_body()
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2888
*/
2889

2890
bool Load_log_event::write_data_body(IO_CACHE* file)
2891
{
2892 2893 2894
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
2895
  {
2896 2897 2898
    if (my_b_safe_write(file, (byte*)field_lens, num_fields) ||
	my_b_safe_write(file, (byte*)fields, field_block_len))
      return 1;
2899
  }
2900 2901 2902
  return (my_b_safe_write(file, (byte*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (byte*)db, db_len + 1) ||
	  my_b_safe_write(file, (byte*)fname, fname_len));
2903 2904
}

2905

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2906
/*
2907
  Load_log_event::Load_log_event()
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2908
*/
2909

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2910 2911 2912
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,
2913
			       enum enum_duplicates handle_dup,
2914
			       bool ignore, bool using_trans)
2915 2916 2917
  :Log_event(thd_arg, !thd_arg->tmp_table_used ?
	     0 : LOG_EVENT_THREAD_SPECIFIC_F, using_trans),
   thread_id(thd_arg->thread_id),
2918
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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2919 2920
   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
2921
   table_name(table_name_arg ? table_name_arg : ""),
2922
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
2923 2924 2925
{
  time_t end_time;
  time(&end_time);
2926
  exec_time = (ulong) (end_time  - thd_arg->start_time);
2927 2928 2929
  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942
  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;
2943
    
2944
  if (ex->dumpfile)
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2945
    sql_ex.opt_flags|= DUMPFILE_FLAG;
2946
  if (ex->opt_enclosed)
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2947
    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
2948

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2949
  sql_ex.empty_flags= 0;
2950

2951
  switch (handle_dup) {
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2952
  case DUP_REPLACE:
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2953
    sql_ex.opt_flags|= REPLACE_FLAG;
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2954 2955 2956 2957
    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
2958
  }
2959 2960
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
2961

2962 2963 2964 2965 2966 2967 2968 2969 2970 2971
  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;
2972
    
2973
  skip_lines = ex->skip_lines;
2974

2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985
  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);
2986 2987
  }

2988 2989 2990
  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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2991
#endif /* !MYSQL_CLIENT */
2992

2993

2994
/*
2995
  Load_log_event::Load_log_event()
2996

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2997 2998 2999
  NOTE
    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
3000 3001
*/

3002 3003 3004 3005
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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3006
   table_name(0), db(0), fname(0), local_fname(FALSE)
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3007
{
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3008
  DBUG_ENTER("Load_log_event");
3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020
  /*
    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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3021
  DBUG_VOID_RETURN;
3022 3023
}

3024

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3025
/*
3026
  Load_log_event::copy_log_event()
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3027
*/
3028

3029
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
3030 3031
                                   int body_offset,
                                   const Format_description_log_event *description_event)
3032
{
3033
  DBUG_ENTER("Load_log_event::copy_log_event");
3034
  uint data_len;
3035
  char* buf_end = (char*)buf + event_len;
3036 3037
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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3038
  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
3039 3040 3041 3042 3043
  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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3044
	  
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3045
  if ((int) event_len < body_offset)
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3046
    DBUG_RETURN(1);
3047 3048 3049 3050
  /*
    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.
  */
3051 3052 3053
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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3054
    DBUG_RETURN(1);
3055
  
3056
  data_len = event_len - body_offset;
3057
  if (num_fields > data_len) // simple sanity check against corruption
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3058
    DBUG_RETURN(1);
3059
  for (uint i = 0; i < num_fields; i++)
3060
    field_block_len += (uint)field_lens[i] + 1;
3061

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3062 3063 3064 3065
  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
3066 3067
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
3068

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3069
  DBUG_RETURN(0);
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3070 3071 3072
}


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3073
/*
3074
  Load_log_event::print()
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3075
*/
3076 3077

#ifdef MYSQL_CLIENT
3078
void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3079
{
3080
  print(file, print_event_info, 0);
3081 3082
}

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3083

3084
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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3085
			   bool commented)
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3086
{
3087 3088
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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3089
  DBUG_ENTER("Load_log_event::print");
3090
  if (!print_event_info->short_form)
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3091
  {
3092 3093 3094
    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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3095 3096
  }

3097
  bool different_db= 1;
3098
  if (db)
3099
  {
3100 3101 3102 3103 3104 3105
    /*
      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.
    */
3106
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
3107
        !commented)
3108
      memcpy(print_event_info->db, db, db_len + 1);
3109
  }
3110
  
3111
  if (db && db[0] && different_db)
3112
    my_b_printf(&cache, "%suse %s%s\n", 
3113
            commented ? "# " : "",
3114
            db, print_event_info->delimiter);
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3115

3116
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
3117
    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
3118 3119
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
3120
  my_b_printf(&cache, "%sLOAD DATA ",
3121
              commented ? "# " : "");
3122
  if (check_fname_outside_temp_buf())
3123 3124
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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3125

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3126
  if (sql_ex.opt_flags & REPLACE_FLAG)
3127
    my_b_printf(&cache," REPLACE ");
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3128
  else if (sql_ex.opt_flags & IGNORE_FLAG)
3129
    my_b_printf(&cache," IGNORE ");
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3130
  
3131 3132 3133
  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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3134

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3135
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
3136 3137 3138
    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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3139
     
3140 3141
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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3142
     
3143 3144
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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3145

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3146

3147
  if (sql_ex.line_start)
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3148
  {
3149 3150
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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3151
  }
3152
  if ((long) skip_lines > 0)
3153
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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3154

3155 3156 3157 3158
  if (num_fields)
  {
    uint i;
    const char* field = fields;
3159
    my_b_printf(&cache, " (");
3160
    for (i = 0; i < num_fields; i++)
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3161
    {
3162
      if (i)
3163 3164
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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3165
	  
3166
      field += field_lens[i]  + 1;
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3167
    }
3168
    my_b_printf(&cache, ")");
3169
  }
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3170

3171
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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3172
  DBUG_VOID_RETURN;
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3173
}
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3174
#endif /* MYSQL_CLIENT */
3175

3176

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3177
/*
3178
  Load_log_event::set_fields()
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3179 3180 3181 3182 3183

  Note that 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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3184
*/
3185

3186
#ifndef MYSQL_CLIENT
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3187
void Load_log_event::set_fields(const char* affected_db, 
3188 3189
				List<Item> &field_list,
                                Name_resolution_context *context)
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3190 3191
{
  uint i;
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3192
  const char* field = fields;
3193
  for (i= 0; i < num_fields; i++)
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3194
  {
3195 3196
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
3197
    field+= field_lens[i]  + 1;
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3198
  }
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}
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3200
#endif /* !MYSQL_CLIENT */
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SCRUM  
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3203
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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3204 3205
/*
  Does the data loading job when executing a LOAD DATA on the slave
3206

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3207
  SYNOPSIS
3208
    Load_log_event::do_apply_event
3209 3210 3211
      net
      rli
      use_rli_only_for_errors	  - if set to 1, rli is provided to
3212
                                  Load_log_event::do_apply_event
3213 3214 3215 3216 3217 3218
                                  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
3219
                                  Execute_load_log_event::do_apply_event).
3220 3221 3222
                                  - if set to 0, rli is provided for
                                  full use, i.e. for error reports and
                                  position advancing.
3223

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3224 3225
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
3226

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3227
  RETURN VALUE
3228
    0           Success
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3229 3230
    1    	Failure
*/
3231

3232
int Load_log_event::do_apply_event(NET* net, RELAY_LOG_INFO const *rli,
3233
                                   bool use_rli_only_for_errors)
3234
{
3235 3236 3237 3238
  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);
3239
  DBUG_ASSERT(thd->query == 0);
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3240
  thd->query_length= 0;                         // Should not be needed
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3241
  thd->query_error= 0;
3242
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
3243

3244
  /* see Query_log_event::do_apply_event() and BUG#13360 */
3245
  DBUG_ASSERT(!rli->m_table_map.count());
3246
  /*
3247
    Usually lex_start() is called by mysql_parse(), but we need it here
3248 3249
    as the present method does not call mysql_parse().
  */
3250 3251 3252
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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3253
  if (!use_rli_only_for_errors)
3254
  {
3255 3256
    /*
      Saved for InnoDB, see comment in
3257
      Query_log_event::do_apply_event()
3258
    */
3259
    const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
3260
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
3261
  }
3262 3263
 
   /*
3264 3265 3266 3267 3268 3269 3270
    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
3271
    done by testing rules in Create_file_log_event::do_apply_event()
3272 3273 3274
    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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3275 3276 3277 3278 3279 3280 3281 3282


    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
3283
            ::do_apply_event(), then the companion SET also have so
3284
            we don't need to reset_one_shot_variables().
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3285
  */
3286
  if (rpl_filter->db_ok(thd->db))
3287
  {
3288 3289
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
3290
    thd->query_id = next_query_id();
3291
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
3292 3293 3294 3295 3296 3297
    /*
      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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monty@mysql.com committed
3298
    mysql_reset_errors(thd, 0);
3299 3300 3301

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
3302
    tables.db= thd->strmake(thd->db, thd->db_length);
3303
    tables.alias = tables.table_name = (char*) table_name;
3304
    tables.lock_type = TL_WRITE;
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monty@narttu.mysql.fi committed
3305
    tables.updating= 1;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3306

3307
    // the table will be opened in mysql_load    
3308
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
3309 3310 3311 3312 3313 3314 3315 3316
    {
      // 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];
3317
      char *end;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3318
      enum enum_duplicates handle_dup;
3319
      bool ignore= 0;
3320 3321
      char *load_data_query;

3322
      /*
3323 3324
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
3325
      */
3326
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
3327
      {
3328 3329 3330 3331 3332
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
3333
      }
3334 3335 3336 3337 3338 3339 3340

      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;

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3341
      if (sql_ex.opt_flags & REPLACE_FLAG)
3342
      {
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3343
	handle_dup= DUP_REPLACE;
3344
      }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3345
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3346 3347 3348 3349
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3350
      else
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3351
      {
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3352
        /*
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3353
	  When replication is running fine, if it was DUP_ERROR on the
3354
          master then we could choose IGNORE here, because if DUP_ERROR
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3355
          suceeded on master, and data is identical on the master and slave,
3356
          then there should be no uniqueness errors on slave, so IGNORE is
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3357
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
monty@narttu.mysql.fi's avatar
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3358 3359 3360
          (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.
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3361 3362

          If reading from net (a 3.23 master), mysql_load() will change this
3363
          to IGNORE.
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3364 3365
        */
        handle_dup= DUP_ERROR;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3366
      }
3367 3368 3369 3370 3371 3372 3373 3374 3375 3376
      /*
        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;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3377

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3378
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3379 3380 3381 3382 3383
      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);
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3384 3385 3386 3387 3388
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3389 3390 3391 3392 3393 3394

      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;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3395
      List<Item> field_list;
3396 3397
      thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
      set_fields(tables.db, field_list, &thd->lex->select_lex.context);
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3398
      thd->variables.pseudo_thread_id= thread_id;
3399 3400 3401 3402 3403 3404 3405 3406 3407
      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;
      }
3408
      /*
3409
        It is safe to use tmp_list twice because we are not going to
3410 3411
        update it inside mysql_load().
      */
3412 3413
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
3414
                     handle_dup, ignore, net != 0))
3415
        thd->query_error= 1;
3416
      if (thd->cuted_fields)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3417
      {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3418
	/* log_pos is the position of the LOAD event in the master log */
lars@mysql.com's avatar
lars@mysql.com committed
3419 3420 3421 3422 3423 3424 3425
        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));
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3426
      }
3427 3428 3429
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3430 3431
  }
  else
3432 3433 3434 3435 3436 3437 3438 3439 3440
  {
    /*
      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);
  }
3441 3442

error:
3443
  thd->net.vio = 0; 
3444
  const char *remember_db= thd->db;
3445
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3446
  thd->catalog= 0;
3447
  thd->set_db(NULL, 0);                   /* will free the current database */
3448
  thd->query= 0;
3449
  thd->query_length= 0;
3450
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3451 3452 3453
  close_thread_tables(thd);
  if (thd->query_error)
  {
3454
    /* this err/sql_errno code is copy-paste from net_send_error() */
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3455 3456 3457 3458 3459 3460 3461 3462 3463
    const char *err;
    int sql_errno;
    if ((err=thd->net.last_error)[0])
      sql_errno=thd->net.last_errno;
    else
    {
      sql_errno=ER_UNKNOWN_ERROR;
      err=ER(sql_errno);       
    }
3464
    slave_print_msg(ERROR_LEVEL, rli, sql_errno,"\
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3465
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3466
                    err, (char*)table_name, print_slave_db_safe(remember_db));
3467
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3468 3469
    return 1;
  }
3470
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3471
	    
3472
  if (thd->is_fatal_error)
3473
  {
3474
    slave_print_msg(ERROR_LEVEL, rli, ER_UNKNOWN_ERROR, "\
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3475
Fatal error running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3476
                    (char*)table_name, print_slave_db_safe(remember_db));
3477 3478 3479
    return 1;
  }

3480
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
3481
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3482
#endif
3483 3484


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3485
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3486
  Rotate_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3487
**************************************************************************/
3488

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3489
/*
3490
  Rotate_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3491
*/
3492

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3493
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3494
void Rotate_log_event::pack_info(Protocol *protocol)
3495
{
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3496
  char buf1[256], buf[22];
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3497
  String tmp(buf1, sizeof(buf1), log_cs);
3498
  tmp.length(0);
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3499
  tmp.append(new_log_ident, ident_len);
3500
  tmp.append(STRING_WITH_LEN(";pos="));
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monty@narttu.mysql.fi committed
3501 3502
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3503
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3504
#endif
3505

3506

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3507
/*
3508
  Rotate_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3509
*/
3510 3511

#ifdef MYSQL_CLIENT
3512
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3513
{
3514
  char buf[22];
3515 3516
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3517

3518
  if (print_event_info->short_form)
3519
    return;
3520 3521
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
3522
  if (new_log_ident)
3523 3524
    my_b_write(&cache, (byte*) new_log_ident, (uint)ident_len);
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
3525
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3526
#endif /* MYSQL_CLIENT */
3527 3528


3529

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3530
/*
3531
  Rotate_log_event::Rotate_log_event() (2 constructors)
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3532
*/
3533

3534 3535

#ifndef MYSQL_CLIENT
3536
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3537 3538 3539 3540 3541 3542 3543 3544
                                   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];
3545
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
3546 3547
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
3548 3549
#endif
  if (flags & DUP_NAME)
3550
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3551 3552 3553 3554 3555
  DBUG_VOID_RETURN;
}
#endif


3556 3557
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
3558
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3559
{
3560
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3561
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3562 3563
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3564 3565
  uint ident_offset;
  if (event_len < header_size)
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monty@mysql.com committed
3566
    DBUG_VOID_RETURN;
3567
  buf += header_size;
3568 3569 3570 3571
  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; 
3572
  set_if_smaller(ident_len,FN_REFLEN-1);
3573
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
3574
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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monty@mysql.com committed
3575
  DBUG_VOID_RETURN;
3576
}
3577 3578


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3579
/*
3580
  Rotate_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3581
*/
3582

3583
#ifndef MYSQL_CLIENT
3584
bool Rotate_log_event::write(IO_CACHE* file)
3585
{
3586
  char buf[ROTATE_HEADER_LEN];
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monty@mashka.mysql.fi committed
3587
  int8store(buf + R_POS_OFFSET, pos);
3588 3589 3590
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
          my_b_safe_write(file, (byte*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (byte*)new_log_ident, (uint) ident_len));
3591
}
3592
#endif
3593

3594

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3595
/*
3596
  Rotate_log_event::do_apply_event()
3597

3598
  Got a rotate log event from the master
3599

3600 3601 3602
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3603

3604
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3605
    in a A -> B -> A setup.
3606
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3607 3608 3609

  RETURN VALUES
    0	ok
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3610
*/
3611

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3612
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3613
int Rotate_log_event::do_update_pos(RELAY_LOG_INFO *rli)
3614
{
3615
  DBUG_ENTER("Rotate_log_event::do_update_pos");
3616 3617 3618 3619
#ifndef DBUG_OFF
  char buf[32];
#endif

3620 3621
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
3622 3623
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
3624 3625

  pthread_mutex_lock(&rli->data_lock);
3626
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
guilhem@gbichot2's avatar
guilhem@gbichot2 committed
3627
  /*
3628 3629 3630 3631
    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:

guilhem@gbichot2's avatar
guilhem@gbichot2 committed
3632 3633 3634 3635 3636
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
3637 3638 3639 3640

    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
3641
    relay log, which shall not change the group positions.
guilhem@gbichot2's avatar
guilhem@gbichot2 committed
3642
  */
3643
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
3644
      !rli->is_in_group())
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monty@narttu.mysql.fi committed
3645
  {
3646 3647 3648 3649
    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));
3650 3651
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3652
    rli->group_master_log_pos= pos;
3653 3654 3655
    strmake(rli->group_relay_log_name, rli->event_relay_log_name,
            sizeof(rli->group_relay_log_name) - 1);
    rli->notify_group_relay_log_name_update();
3656
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3657 3658
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
3659
                        rli->group_master_log_name,
3660
                        (ulong) rli->group_master_log_pos));
3661
    /*
3662 3663
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3664 3665 3666 3667 3668
      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);
3669
    set_slave_thread_default_charset(thd, rli);
3670
    thd->variables.sql_mode= global_system_variables.sql_mode;
3671 3672
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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monty@narttu.mysql.fi committed
3673
  }
3674 3675 3676
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
3677

3678
  DBUG_RETURN(0);
3679
}
3680

3681 3682

Log_event::enum_skip_reason
3683
Rotate_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3684
{
3685
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
3686 3687

  switch (reason) {
3688
  case Log_event::EVENT_SKIP_NOT:
3689
  case Log_event::EVENT_SKIP_COUNT:
3690
    return Log_event::EVENT_SKIP_NOT;
3691

3692 3693
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
3694 3695
  }
  DBUG_ASSERT(0);
3696
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
3697 3698
}

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#endif
3700 3701


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/**************************************************************************
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3703
	Intvar_log_event methods
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3704
**************************************************************************/
3705

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3706
/*
3707
  Intvar_log_event::pack_info()
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3708
*/
3709

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3710
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3711
void Intvar_log_event::pack_info(Protocol *protocol)
3712
{
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3713 3714
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3715
  *pos++= '=';
3716
  pos= longlong10_to_str(val, pos, -10);
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3717
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3718
}
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3719
#endif
3720

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3721

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3722
/*
3723
  Intvar_log_event::Intvar_log_event()
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3724
*/
3725

3726 3727 3728
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3729
{
3730 3731 3732
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3733 3734
}

3735

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3736
/*
3737
  Intvar_log_event::get_var_type_name()
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3738
*/
3739 3740

const char* Intvar_log_event::get_var_type_name()
3741
{
3742 3743 3744 3745 3746
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3747 3748
}

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3750
/*
3751
  Intvar_log_event::write()
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3752
*/
3753

3754
#ifndef MYSQL_CLIENT
3755
bool Intvar_log_event::write(IO_CACHE* file)
3756
{
3757 3758
  byte buf[9];
  buf[I_TYPE_OFFSET]= (byte) type;
3759
  int8store(buf + I_VAL_OFFSET, val);
3760 3761
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3762
}
3763
#endif
3764

3765

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3766
/*
3767
  Intvar_log_event::print()
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3768
*/
3769 3770

#ifdef MYSQL_CLIENT
3771
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3772
{
3773 3774 3775
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3776 3777
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3778

3779
  if (!print_event_info->short_form)
3780
  {
3781 3782
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
3783
  }
3784

3785
  my_b_printf(&cache, "SET ");
3786 3787 3788 3789 3790 3791 3792
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
3793 3794 3795 3796
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
3797
  }
3798 3799
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
3800
}
3801
#endif
3802

3803

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3804
/*
3805
  Intvar_log_event::do_apply_event()
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3806
*/
3807

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3808
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3809
int Intvar_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3810
{
3811 3812 3813 3814 3815 3816
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

3817 3818
  switch (type) {
  case LAST_INSERT_ID_EVENT:
3819 3820
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
3821 3822
    break;
  case INSERT_ID_EVENT:
3823
    thd->force_one_auto_inc_interval(val);
3824 3825
    break;
  }
3826 3827 3828 3829 3830
  return 0;
}

int Intvar_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3831
  rli->inc_event_relay_log_pos();
3832
  return 0;
3833
}
3834 3835 3836


Log_event::enum_skip_reason
3837
Intvar_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3838 3839
{
  /*
3840 3841 3842 3843 3844 3845
    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.
3846 3847
  */
  if (rli->slave_skip_counter == 1)
3848
    return Log_event::EVENT_SKIP_IGNORE;
3849
  else
3850
    return Log_event::do_shall_skip(rli);
3851 3852
}

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#endif
3854

3855

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3856
/**************************************************************************
3857
  Rand_log_event methods
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3858
**************************************************************************/
3859

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3860
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3861
void Rand_log_event::pack_info(Protocol *protocol)
3862
{
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3863 3864 3865 3866 3867
  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);
3868
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3869
}
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3870
#endif
3871 3872


3873 3874 3875
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3876
{
3877 3878 3879
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3880 3881
}

3882

3883
#ifndef MYSQL_CLIENT
3884
bool Rand_log_event::write(IO_CACHE* file)
3885
{
3886
  byte buf[16];
3887 3888
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3889 3890
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3891
}
3892
#endif
3893

3894 3895

#ifdef MYSQL_CLIENT
3896
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3897
{
3898 3899 3900
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

3901
  char llbuff[22],llbuff2[22];
3902
  if (!print_event_info->short_form)
3903
  {
3904 3905
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
3906
  }
3907 3908 3909
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
3910
}
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3911
#endif /* MYSQL_CLIENT */
3912

3913

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3914
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3915
int Rand_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3916
{
3917 3918 3919 3920 3921 3922
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

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3923 3924
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3925 3926 3927 3928 3929
  return 0;
}

int Rand_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3930
  rli->inc_event_relay_log_pos();
3931 3932
  return 0;
}
3933

3934 3935

Log_event::enum_skip_reason
3936
Rand_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3937 3938
{
  /*
3939 3940 3941 3942 3943 3944
    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.
3945 3946
  */
  if (rli->slave_skip_counter == 1)
3947
    return Log_event::EVENT_SKIP_IGNORE;
3948
  else
3949
    return Log_event::do_shall_skip(rli);
3950 3951
}

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3952
#endif /* !MYSQL_CLIENT */
3953

3954

3955 3956 3957 3958 3959 3960 3961
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3962 3963
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3964
  pos= longlong10_to_str(xid, pos, 10);
3965
  pos= strmov(pos, " */");
3966 3967 3968 3969
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

3970 3971 3972 3973 3974 3975 3976 3977
/*
  NOTE it's ok not to use int8store here,
  as long as xid_t::set(ulonglong) and
  xid_t::get_my_xid doesn't do it either

  we don't care about actual values of xids as long as
  identical numbers compare identically
*/
3978 3979 3980 3981

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3982 3983 3984
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3985
  memcpy((char*) &xid, buf, sizeof(xid));
3986 3987 3988
}


3989
#ifndef MYSQL_CLIENT
3990 3991 3992 3993 3994
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
         my_b_safe_write(file, (byte*) &xid, sizeof(xid));
}
3995
#endif
3996 3997 3998


#ifdef MYSQL_CLIENT
3999
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4000
{
4001 4002 4003
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

4004
  if (!print_event_info->short_form)
4005
  {
4006 4007 4008
    char buf[64];
    longlong10_to_str(xid, buf, 10);

4009 4010
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
4011
  }
4012
  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
4013 4014 4015 4016 4017
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4018
int Xid_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4019
{
4020
  /* For a slave Xid_log_event is COMMIT */
4021 4022
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
4023
  return end_trans(thd, COMMIT);
4024 4025 4026 4027
}
#endif /* !MYSQL_CLIENT */


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4028
/**************************************************************************
4029
  User_var_log_event methods
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4030
**************************************************************************/
4031

4032
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4033 4034 4035
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
4036
  uint val_offset= 4 + name_len;
4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051
  uint event_len= val_offset;

  if (is_null)
  {
    buf= my_malloc(val_offset + 5, MYF(MY_WME));
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
      buf= my_malloc(val_offset + FLOATING_POINT_BUFFER, MYF(MY_WME));
4052 4053
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
4054 4055 4056 4057 4058
      break;
    case INT_RESULT:
      buf= my_malloc(val_offset + 22, MYF(MY_WME));
      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
4059 4060 4061 4062 4063 4064 4065 4066 4067 4068
    case DECIMAL_RESULT:
    {
      buf= my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH, MYF(MY_WME));
      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
      binary2my_decimal(E_DEC_FATAL_ERROR, val+2, &dec, val[0], val[1]);
      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
4069
    case STRING_RESULT:
4070 4071 4072 4073 4074 4075 4076 4077 4078 4079
      /* 15 is for 'COLLATE' and other chars */
      buf= my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15, MYF(MY_WME));
      CHARSET_INFO *cs;
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
4080 4081 4082
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
4083 4084
        event_len= p-buf;
      }
4085
      break;
4086
    case ROW_RESULT:
4087
    default:
4088 4089 4090 4091 4092
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
4093 4094 4095 4096
  buf[1]= '`';
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
  memcpy(buf+2, name, name_len);
4097
  protocol->store(buf, event_len, &my_charset_bin);
4098 4099
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
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4100
#endif /* !MYSQL_CLIENT */
4101 4102


4103 4104 4105 4106
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4107
{
4108
  buf+= description_event->common_header_len;
4109 4110
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
4111 4112
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
4113 4114 4115
  if (is_null)
  {
    type= STRING_RESULT;
4116
    charset_number= my_charset_bin.number;
4117 4118 4119 4120 4121
    val_len= 0;
    val= 0;  
  }
  else
  {
4122 4123 4124
    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 + 
4125
		       UV_CHARSET_NUMBER_SIZE);
4126 4127
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
4128 4129 4130 4131
  }
}


4132
#ifndef MYSQL_CLIENT
4133
bool User_var_log_event::write(IO_CACHE* file)
4134 4135 4136 4137
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
4138
  char buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
4139
  uint buf1_length;
4140
  ulong event_length;
4141

4142
  int4store(buf, name_len);
4143 4144 4145 4146 4147 4148 4149
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
    val_len= 0;
  }    
  else
4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160
  {
    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;
4161 4162 4163 4164 4165 4166
    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;
4167
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
4168 4169 4170
      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
4171 4172 4173
    case STRING_RESULT:
      pos= val;
      break;
4174
    case ROW_RESULT:
4175
    default:
4176 4177 4178
      DBUG_ASSERT(1);
      return 0;
    }
4179 4180
    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
4181
  }
4182 4183 4184 4185 4186 4187

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

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) buf, sizeof(buf))   ||
4188 4189 4190
	  my_b_safe_write(file, (byte*) name, name_len)     ||
	  my_b_safe_write(file, (byte*) buf1, buf1_length) ||
	  my_b_safe_write(file, (byte*) pos, val_len));
4191
}
4192
#endif
4193

4194

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monty@narttu.mysql.fi committed
4195
/*
4196
  User_var_log_event::print()
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4197
*/
4198 4199

#ifdef MYSQL_CLIENT
4200
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4201
{
4202 4203 4204
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

4205
  if (!print_event_info->short_form)
4206
  {
4207 4208
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
4209 4210
  }

4211 4212 4213
  my_b_printf(&cache, "SET @`");
  my_b_write(&cache, (byte*) name, (uint) (name_len));
  my_b_printf(&cache, "`");
4214 4215 4216

  if (is_null)
  {
4217
    my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
4218 4219 4220 4221 4222 4223 4224
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
4225
      my_b_printf(&cache, ":=%.14g%s\n", real_val, print_event_info->delimiter);
4226 4227 4228 4229
      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
4230
      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
4231
      break;
4232 4233 4234 4235 4236 4237
    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
4238 4239
      decimal_digit_t dec_buf[10];
      decimal_t dec;
4240 4241 4242 4243 4244 4245
      dec.len= 10;
      dec.buf= dec_buf;

      bin2decimal(val+2, &dec, precision, scale);
      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
4246
      my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
4247 4248
      break;
    }
4249
    case STRING_RESULT:
4250
    {
4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264
      /*
        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.
      */
4265 4266 4267 4268
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
4269
        break; // no error, as we are 'void'
4270
      str_to_hex(hex_str, val, val_len);
4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281
      /*
        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.
        */
4282
        my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter);
4283
      else
4284 4285 4286
        my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n",
                    cs->csname, hex_str, cs->name,
                    print_event_info->delimiter);
4287
      my_afree(hex_str);
4288
    }
4289
      break;
4290
    case ROW_RESULT:
4291
    default:
4292
      DBUG_ASSERT(1);
4293 4294 4295 4296
      return;
    }
  }
}
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4297
#endif
4298

4299

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4300
/*
4301
  User_var_log_event::do_apply_event()
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4302
*/
4303

4304
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4305
int User_var_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4306 4307
{
  Item *it= 0;
4308 4309 4310
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
4311 4312 4313
  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
4314 4315
  double real_val;
  longlong int_val;
4316

4317 4318 4319 4320 4321 4322
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

4323 4324 4325 4326 4327 4328 4329 4330 4331
  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
4332
      it= new Item_float(real_val);
4333
      val= (char*) &real_val;		// Pointer to value in native format
4334
      val_len= 8;
4335 4336
      break;
    case INT_RESULT:
4337 4338 4339
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
4340
      val_len= 8;
4341
      break;
4342 4343 4344 4345 4346 4347 4348 4349
    case DECIMAL_RESULT:
    {
      Item_decimal *dec= new Item_decimal(val+2, val[0], val[1]);
      it= dec;
      val= (char *)dec->val_decimal(NULL);
      val_len= sizeof(my_decimal);
      break;
    }
4350 4351 4352
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
4353
    case ROW_RESULT:
4354
    default:
4355 4356 4357 4358 4359
      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
4360 4361 4362 4363
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
4364
  e.fix_fields(thd, 0);
4365 4366 4367 4368 4369
  /*
    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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4370
  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
4371
  free_root(thd->mem_root,0);
4372

4373 4374 4375 4376 4377
  return 0;
}

int User_var_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
4378
  rli->inc_event_relay_log_pos();
4379 4380
  return 0;
}
4381

4382
Log_event::enum_skip_reason
4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397
User_var_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  /*
    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.
  */
  if (rli->slave_skip_counter == 1)
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}
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4398
#endif /* !MYSQL_CLIENT */
4399 4400


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4401
/**************************************************************************
4402
  Slave_log_event methods
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4403
**************************************************************************/
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4405
#ifdef HAVE_REPLICATION
4406
#ifdef MYSQL_CLIENT
4407
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
4408
{
4409 4410
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

4411
  if (print_event_info->short_form)
4412
    return;
4413 4414
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
4415 4416
}
#endif  
4417

4418
#ifndef MYSQL_CLIENT
4419
void Slave_log_event::pack_info(Protocol *protocol)
4420
{
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4421
  char buf[256+HOSTNAME_LENGTH], *pos;
4422 4423 4424 4425 4426 4427 4428
  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=");
4429
  pos= longlong10_to_str(master_pos, pos, 10);
4430
  protocol->store(buf, pos-buf, &my_charset_bin);
4431
}
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4432
#endif /* !MYSQL_CLIENT */
4433 4434 4435 4436


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
4437
				 RELAY_LOG_INFO* rli)
4438
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
4439 4440 4441 4442
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
4443

4444 4445 4446 4447 4448
  MASTER_INFO* mi = rli->mi;
  // 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);
4449
  master_log_len = strlen(rli->group_master_log_name);
4450 4451 4452
  // 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))))
4453
  {
4454 4455 4456
    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;
4457
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
4458
    master_port = mi->port;
4459
    master_pos = rli->group_master_log_pos;
4460
    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
4461
			(ulong) master_pos));
4462
  }
4463 4464 4465 4466 4467 4468
  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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4469
#endif /* !MYSQL_CLIENT */
4470 4471 4472 4473 4474 4475 4476 4477 4478


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


#ifdef MYSQL_CLIENT
4479
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4480
{
4481 4482
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4483
  char llbuff[22];
4484
  if (print_event_info->short_form)
4485
    return;
4486 4487
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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4488
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
4489 4490
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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4491
#endif /* MYSQL_CLIENT */
4492 4493 4494 4495 4496 4497 4498 4499


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


4500
#ifndef MYSQL_CLIENT
4501
bool Slave_log_event::write(IO_CACHE* file)
4502
{
4503
  ulong event_length= get_data_size();
4504 4505 4506
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4507 4508 4509

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) mem_pool, event_length));
4510
}
4511
#endif
4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522


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)
4523
  {
4524 4525
    master_host = 0;
    return;
4526
  }
4527 4528
  master_log_len = strlen(master_log);
}
4529

4530

4531 4532 4533
/* This code is not used, so has not been updated to be format-tolerant */
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
4534
{
4535
  if (event_len < LOG_EVENT_HEADER_LEN)
4536
    return;
4537
  event_len -= LOG_EVENT_HEADER_LEN;
4538 4539 4540 4541 4542
  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);
4543 4544
}

4545

4546
#ifndef MYSQL_CLIENT
4547
int Slave_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4548 4549 4550
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
4551
  return 0;
4552
}
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4553
#endif /* !MYSQL_CLIENT */
4554 4555


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4556
/**************************************************************************
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monty@narttu.mysql.fi committed
4557
	Stop_log_event methods
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4558
**************************************************************************/
4559

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monty@narttu.mysql.fi committed
4560
/*
4561
  Stop_log_event::print()
4562
*/
4563 4564

#ifdef MYSQL_CLIENT
4565
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4566
{
4567 4568 4569
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

4570
  if (print_event_info->short_form)
4571 4572
    return;

4573 4574
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
4575
}
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4576
#endif /* MYSQL_CLIENT */
4577

4578

4579
/*
4580
  Stop_log_event::do_apply_event()
4581 4582 4583 4584 4585 4586 4587 4588

  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
4589
  Start_log_event_v3::do_apply_event(), not here. Because if we come
4590
  here, the master was sane.
4591 4592
*/

4593
#ifndef MYSQL_CLIENT
4594
int Stop_log_event::do_update_pos(RELAY_LOG_INFO *rli)
4595
{
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monty@hundin.mysql.fi committed
4596 4597
  /*
    We do not want to update master_log pos because we get a rotate event
4598
    before stop, so by now group_master_log_name is set to the next log.
4599
    If we updated it, we will have incorrect master coordinates and this
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4600
    could give false triggers in MASTER_POS_WAIT() that we have reached
4601
    the target position when in fact we have not.
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monty@hundin.mysql.fi committed
4602
  */
4603 4604 4605 4606 4607 4608 4609
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4610 4611
  return 0;
}
4612

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4613
#endif /* !MYSQL_CLIENT */
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4614
#endif /* HAVE_REPLICATION */
4615

4616

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4617
/**************************************************************************
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4618
	Create_file_log_event methods
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4619
**************************************************************************/
4620 4621

/*
4622
  Create_file_log_event ctor
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4623
*/
4624 4625

#ifndef MYSQL_CLIENT
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4626 4627 4628 4629
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,
4630
                      bool ignore,
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4631
		      char* block_arg, uint block_len_arg, bool using_trans)
4632
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4633
		  using_trans),
4634
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4635
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4636
{
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monty@mysql.com committed
4637
  DBUG_ENTER("Create_file_log_event");
4638
  sql_ex.force_new_format();
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monty@mysql.com committed
4639
  DBUG_VOID_RETURN;
4640
}
4641

4642

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monty@narttu.mysql.fi committed
4643
/*
4644
  Create_file_log_event::write_data_body()
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monty@narttu.mysql.fi committed
4645
*/
4646

4647
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4648
{
4649 4650
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4651 4652
    return res;
  return (my_b_safe_write(file, (byte*) "", 1) ||
4653
          my_b_safe_write(file, (byte*) block, block_len));
4654 4655
}

4656

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4657
/*
4658
  Create_file_log_event::write_data_header()
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4659
*/
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4660

4661
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4662
{
4663
  bool res;
4664
  byte buf[CREATE_FILE_HEADER_LEN];
4665 4666
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4667
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4668
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4669 4670 4671
}


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monty@narttu.mysql.fi committed
4672
/*
4673
  Create_file_log_event::write_base()
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monty@narttu.mysql.fi committed
4674
*/
4675

4676
bool Create_file_log_event::write_base(IO_CACHE* file)
4677
{
4678 4679 4680 4681
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4682 4683 4684
  return res;
}

4685
#endif /* !MYSQL_CLIENT */
4686

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monty@narttu.mysql.fi committed
4687
/*
4688
  Create_file_log_event ctor
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monty@narttu.mysql.fi committed
4689
*/
4690

4691 4692 4693
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)
4694
{
4695 4696 4697 4698 4699
  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];
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4700
  if (!(event_buf= my_memdup((byte*) buf, len, MYF(MY_WME))) ||
4701 4702 4703 4704 4705 4706 4707
      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))
monty@mysql.com's avatar
monty@mysql.com committed
4708
    DBUG_VOID_RETURN;
4709
  if (description_event->binlog_version!=1)
4710
  {
4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727
    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);
4728 4729 4730 4731 4732 4733 4734 4735 4736
    if (len < block_offset)
      return;
    block = (char*)buf + block_offset;
    block_len = len - block_offset;
  }
  else
  {
    sql_ex.force_new_format();
    inited_from_old = 1;
4737
  }
monty@mysql.com's avatar
monty@mysql.com committed
4738
  DBUG_VOID_RETURN;
4739 4740
}

4741

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4742
/*
4743
  Create_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4744
*/
4745 4746

#ifdef MYSQL_CLIENT
4747
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
lars@mysql.com's avatar
lars@mysql.com committed
4748
				  bool enable_local)
nick@mysql.com's avatar
nick@mysql.com committed
4749
{
4750 4751
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4752
  if (print_event_info->short_form)
4753 4754
  {
    if (enable_local && check_fname_outside_temp_buf())
4755
      Load_log_event::print(file, print_event_info);
4756
    return;
4757 4758 4759 4760
  }

  if (enable_local)
  {
4761
    Load_log_event::print(file, print_event_info,
4762
			  !check_fname_outside_temp_buf());
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4763 4764 4765 4766
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
4767
    my_b_printf(&cache, "#"); 
4768 4769
  }

4770
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
nick@mysql.com's avatar
nick@mysql.com committed
4771
}
4772

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4773

4774
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4775
{
4776
  print(file, print_event_info, 0);
4777
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4778
#endif /* MYSQL_CLIENT */
nick@mysql.com's avatar
nick@mysql.com committed
4779

4780

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4781
/*
4782
  Create_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4783
*/
4784

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SCRUM  
hf@deer.mysql.r18.ru committed
4785
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4786
void Create_file_log_event::pack_info(Protocol *protocol)
4787
{
4788 4789 4790
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
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monty@mashka.mysql.fi committed
4791
  pos= strmov(pos + db_len, ";table=");
4792
  memcpy(pos, table_name, table_name_len);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4793
  pos= strmov(pos + table_name_len, ";file_id=");
4794 4795 4796
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4797
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4798
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4799
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4800 4801


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monty@narttu.mysql.fi committed
4802
/*
4803
  Create_file_log_event::do_apply_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4804
*/
4805

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SCRUM  
hf@deer.mysql.r18.ru committed
4806
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4807
int Create_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4808
{
4809 4810
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4811 4812 4813
  int fd = -1;
  IO_CACHE file;
  int error = 1;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4814

4815
  bzero((char*)&file, sizeof(file));
4816 4817
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4818
  thd->proc_info= proc_info;
4819 4820 4821 4822
  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 ||
4823 4824 4825
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4826 4827
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4828 4829 4830 4831
    goto err;
  }
  
  // a trick to avoid allocating another buffer
4832 4833
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4834 4835
  if (write_base(&file))
  {
4836
    strmov(ext, ".info"); // to have it right in the error message
4837 4838 4839
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in Create_file event: could not write to file '%s'",
                    fname_buf);
4840 4841 4842 4843 4844 4845
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4846 4847 4848 4849
  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)
4850
  {
4851 4852
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4853 4854
    goto err;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4855
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4856
  {
4857 4858
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "write to '%s' failed", fname_buf);
4859 4860
    goto err;
  }
4861 4862
  error=0;					// Everything is ok

4863 4864 4865 4866 4867
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
4868
  thd->proc_info= 0;
4869
  return error == 0;
4870
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4871
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4872

4873

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monty@mashka.mysql.fi committed
4874
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4875
	Append_block_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4876
**************************************************************************/
4877

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4878
/*
4879
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4880
*/
4881 4882

#ifndef MYSQL_CLIENT  
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4883 4884
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4885 4886 4887
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4888
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4889 4890
{
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4891
#endif
4892 4893


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4894
/*
4895
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4896
*/
4897

4898 4899 4900
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)
4901
{
4902 4903 4904 4905 4906 4907
  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)
monty@mysql.com's avatar
monty@mysql.com committed
4908
    DBUG_VOID_RETURN;
4909 4910 4911
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
  block= (char*)buf + total_header_len;
  block_len= len - total_header_len;
monty@mysql.com's avatar
monty@mysql.com committed
4912
  DBUG_VOID_RETURN;
4913 4914 4915
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4916
/*
4917
  Append_block_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4918
*/
4919

4920
#ifndef MYSQL_CLIENT
4921
bool Append_block_log_event::write(IO_CACHE* file)
4922 4923 4924
{
  byte buf[APPEND_BLOCK_HEADER_LEN];
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4925 4926
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4927 4928
	  my_b_safe_write(file, (byte*) block, block_len));
}
4929
#endif
4930 4931


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4932
/*
4933
  Append_block_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4934
*/
4935 4936

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4937
void Append_block_log_event::print(FILE* file,
4938
				   PRINT_EVENT_INFO* print_event_info)
4939
{
4940 4941
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4942
  if (print_event_info->short_form)
4943
    return;
4944 4945 4946
  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);
4947
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4948
#endif /* MYSQL_CLIENT */
4949 4950


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4951
/*
4952
  Append_block_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4953
*/
4954

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4955
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4956
void Append_block_log_event::pack_info(Protocol *protocol)
4957 4958 4959 4960 4961 4962
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4963
  protocol->store(buf, length, &my_charset_bin);
4964 4965 4966
}


4967
/*
4968
  Append_block_log_event::get_create_or_append()
4969 4970
*/

4971
int Append_block_log_event::get_create_or_append() const
4972
{
4973
  return 0; /* append to the file, fail if not exists */
4974 4975
}

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4976
/*
4977
  Append_block_log_event::do_apply_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4978
*/
4979

4980
int Append_block_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4981
{
4982
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
4983
  int fd;
4984
  int error = 1;
4985
  DBUG_ENTER("Append_block_log_event::do_apply_event");
4986

4987 4988
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
4989
  thd->proc_info= proc_info;
4990 4991 4992 4993 4994 4995 4996
  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)
    {
4997 4998 4999
      slave_print_msg(ERROR_LEVEL, rli, my_errno,
                      "Error in %s event: could not create file '%s'",
                      get_type_str(), fname);
5000 5001 5002
      goto err;
    }
  }
5003 5004
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
5005
  {
5006 5007 5008
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: could not open file '%s'",
                    get_type_str(), fname);
5009 5010
    goto err;
  }
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monty@hundin.mysql.fi committed
5011
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
5012
  {
5013 5014 5015
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: write to '%s' failed",
                    get_type_str(), fname);
5016 5017 5018
    goto err;
  }
  error=0;
5019

5020 5021 5022
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
5023
  thd->proc_info= 0;
5024
  DBUG_RETURN(error);
5025
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
5026
#endif
5027 5028


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5029
/**************************************************************************
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monty@narttu.mysql.fi committed
5030
	Delete_file_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5031
**************************************************************************/
5032

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5033
/*
5034
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5035
*/
5036 5037

#ifndef MYSQL_CLIENT
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monty@narttu.mysql.fi committed
5038 5039 5040
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)
5041 5042
{
}
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monty@narttu.mysql.fi committed
5043
#endif
5044

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5045
/*
5046
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5047
*/
5048

5049 5050 5051
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)
5052
{
5053 5054 5055
  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))
5056
    return;
5057
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
5058 5059 5060
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5061
/*
5062
  Delete_file_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5063
*/
5064

5065
#ifndef MYSQL_CLIENT
5066
bool Delete_file_log_event::write(IO_CACHE* file)
5067 5068 5069
{
 byte buf[DELETE_FILE_HEADER_LEN];
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
5070 5071
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
5072
}
5073
#endif
5074 5075


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5076
/*
5077
  Delete_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5078
*/
5079 5080

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
5081
void Delete_file_log_event::print(FILE* file,
5082
				  PRINT_EVENT_INFO* print_event_info)
5083
{
5084 5085
  Write_on_release_cache cache(&print_event_info->head_cache, file);

5086
  if (print_event_info->short_form)
5087
    return;
5088 5089
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
5090
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5091
#endif /* MYSQL_CLIENT */
5092

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5093
/*
5094
  Delete_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5095
*/
5096

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
5097
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5098
void Delete_file_log_event::pack_info(Protocol *protocol)
5099 5100 5101 5102
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5103
  protocol->store(buf, (int32) length, &my_charset_bin);
5104
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
5105
#endif
5106

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5107
/*
5108
  Delete_file_log_event::do_apply_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5109
*/
5110

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SCRUM  
hf@deer.mysql.r18.ru committed
5111
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5112
int Delete_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5113 5114
{
  char fname[FN_REFLEN+10];
5115
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
5116
  (void) my_delete(fname, MYF(MY_WME));
5117
  strmov(ext, ".info");
5118
  (void) my_delete(fname, MYF(MY_WME));
5119
  return 0;
5120
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5121
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5122 5123


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5124
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5125
	Execute_load_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5126
**************************************************************************/
5127

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monty@narttu.mysql.fi committed
5128
/*
5129
  Execute_load_log_event ctor
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5130
*/
5131 5132

#ifndef MYSQL_CLIENT  
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Execute_load_log_event::Execute_load_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)
5136 5137
{
}
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5138
#endif
5139 5140
  

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5141
/*
5142
  Execute_load_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5143
*/
5144

5145 5146 5147
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)
5148
{
5149 5150 5151
  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))
5152
    return;
5153
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
5154 5155 5156
}


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monty@narttu.mysql.fi committed
5157
/*
5158
  Execute_load_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5159
*/
5160

5161
#ifndef MYSQL_CLIENT
5162
bool Execute_load_log_event::write(IO_CACHE* file)
5163 5164 5165
{
  byte buf[EXEC_LOAD_HEADER_LEN];
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
5166 5167
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
5168
}
5169
#endif
5170 5171


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5172
/*
5173
  Execute_load_log_event::print()
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5174
*/
5175 5176

#ifdef MYSQL_CLIENT  
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5177
void Execute_load_log_event::print(FILE* file,
5178
				   PRINT_EVENT_INFO* print_event_info)
5179
{
5180 5181
  Write_on_release_cache cache(&print_event_info->head_cache, file);

5182
  if (print_event_info->short_form)
5183
    return;
5184 5185 5186
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
5187
}
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5188
#endif
5189

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5190
/*
5191
  Execute_load_log_event::pack_info()
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monty@narttu.mysql.fi committed
5192
*/
5193

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hf@deer.mysql.r18.ru committed
5194
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5195
void Execute_load_log_event::pack_info(Protocol *protocol)
5196 5197 5198 5199
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5200
  protocol->store(buf, (int32) length, &my_charset_bin);
5201 5202 5203
}


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monty@narttu.mysql.fi committed
5204
/*
5205
  Execute_load_log_event::do_apply_event()
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monty@narttu.mysql.fi committed
5206
*/
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5207

5208
int Execute_load_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5209 5210
{
  char fname[FN_REFLEN+10];
5211
  char *ext;
5212
  int fd;
5213
  int error= 1;
5214
  IO_CACHE file;
5215
  Load_log_event *lev= 0;
5216

5217
  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
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  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
5220 5221 5222
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5223 5224
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Exec_load event: "
                    "could not open file '%s'", fname);
5225 5226
    goto err;
  }
5227
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
5228 5229
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
5230
      lev->get_type_code() != NEW_LOAD_EVENT)
5231
  {
5232 5233
    slave_print_msg(ERROR_LEVEL, rli, 0, "Error in Exec_load event: "
                    "file '%s' appears corrupted", fname);
5234 5235
    goto err;
  }
5236

5237
  lev->thd = thd;
5238
  /*
5239
    lev->do_apply_event should use rli only for errors i.e. should
5240 5241
    not advance rli's position.

5242
    lev->do_apply_event is the place where the table is loaded (it
5243
    calls mysql_load()).
5244
  */
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guilhem@mysql.com committed
5245

5246 5247
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
  if (lev->do_apply_event(0,rli,1)) 
5248
  {
5249 5250 5251 5252 5253 5254 5255 5256 5257
    /*
      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.
    */
    char *tmp= my_strdup(rli->last_slave_error,MYF(MY_WME));
5258 5259
    if (tmp)
    {
5260 5261 5262 5263
      slave_print_msg(ERROR_LEVEL, rli,
                      rli->last_slave_errno, /* ok to re-use error code */
                      "%s. Failed executing load from '%s'", 
                      tmp, fname);
5264 5265
      my_free(tmp,MYF(0));
    }
5266 5267
    goto err;
  }
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  /*
    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;
  }
5278
  (void) my_delete(fname, MYF(MY_WME));
5279
  memcpy(ext, ".data", 6);
5280
  (void) my_delete(fname, MYF(MY_WME));
5281
  error = 0;
5282

5283 5284 5285
err:
  delete lev;
  if (fd >= 0)
5286
  {
5287
    my_close(fd, MYF(0));
5288 5289
    end_io_cache(&file);
  }
5290
  return error;
5291
}
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5292

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monty@narttu.mysql.fi committed
5293
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
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5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320
/**************************************************************************
	Begin_load_query_log_event methods
**************************************************************************/

#ifndef MYSQL_CLIENT
Begin_load_query_log_event::
Begin_load_query_log_event(THD* thd_arg, const char* db_arg, char* block_arg,
                           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)
5321
int Begin_load_query_log_event::get_create_or_append() const
5322
{
5323
  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


/**************************************************************************
	Execute_load_query_log_event methods
**************************************************************************/


#ifndef MYSQL_CLIENT
Execute_load_query_log_event::
Execute_load_query_log_event(THD* thd_arg, const char* query_arg,
                     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):
  Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
                  suppress_use),
  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;
}


5378
#ifndef MYSQL_CLIENT
5379 5380 5381 5382 5383 5384 5385 5386 5387 5388
bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
  char buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
  int4store(buf, file_id);
  int4store(buf + 4, fn_pos_start);
  int4store(buf + 4 + 4, fn_pos_end);
  *(buf + 4 + 4 + 4)= (char)dup_handling;
  return my_b_safe_write(file, (byte*) buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
}
5389
#endif
5390 5391 5392


#ifdef MYSQL_CLIENT
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5393
void Execute_load_query_log_event::print(FILE* file,
5394
                                         PRINT_EVENT_INFO* print_event_info)
5395
{
5396
  print(file, print_event_info, 0);
5397 5398 5399
}


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5400
void Execute_load_query_log_event::print(FILE* file,
5401
                                         PRINT_EVENT_INFO* print_event_info,
5402 5403
                                         const char *local_fname)
{
5404 5405 5406
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
5407 5408 5409

  if (local_fname)
  {
5410 5411 5412 5413
    my_b_write(&cache, (byte*) query, fn_pos_start);
    my_b_printf(&cache, " LOCAL INFILE \'");
    my_b_printf(&cache, local_fname);
    my_b_printf(&cache, "\'");
5414
    if (dup_handling == LOAD_DUP_REPLACE)
5415 5416 5417
      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
    my_b_write(&cache, (byte*) query + fn_pos_end, q_len-fn_pos_end);
5418
    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
5419 5420 5421
  }
  else
  {
5422
    my_b_write(&cache, (byte*) query, q_len);
5423
    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
5424 5425
  }

5426
  if (!print_event_info->short_form)
5427
    my_b_printf(&cache, "# file_id: %d \n", file_id);
5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457
}
#endif


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_query_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
  if (!(buf= my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME))))
    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
5458
Execute_load_query_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469
{
  char *p;
  char *buf;
  char *fname;
  char *fname_end;
  int error;

  /* Replace filename and LOCAL keyword in query before executing it */
  if (!(buf = my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                        (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME))))
  {
5470
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Not enough memory");
5471 5472 5473 5474 5475 5476
    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
5477
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
5478 5479
  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
5480
  *(p++)='\'';
5481
  switch (dup_handling) {
5482
  case LOAD_DUP_IGNORE:
5483
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
5484 5485
    break;
  case LOAD_DUP_REPLACE:
5486
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
5487 5488 5489 5490 5491
    break;
  default:
    /* Ordinary load data */
    break;
  }
5492
  p= strmake(p, STRING_WITH_LEN(" INTO"));
5493 5494
  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

5495
  error= Query_log_event::do_apply_event(rli, buf, p-buf);
5496 5497 5498 5499

  /* Forging file name for deletion in same buffer */
  *fname_end= 0;

5500 5501 5502 5503 5504 5505
  /*
    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));
5506 5507 5508 5509 5510 5511 5512

  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
  return error;
}
#endif


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monty@mashka.mysql.fi committed
5513
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5514
	sql_ex_info methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5515
**************************************************************************/
5516

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monty@narttu.mysql.fi committed
5517
/*
5518
  sql_ex_info::write_data()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5519
*/
5520

5521
bool sql_ex_info::write_data(IO_CACHE* file)
5522 5523 5524
{
  if (new_format())
  {
5525 5526 5527 5528 5529
    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) ||
5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541
	    my_b_safe_write(file,(byte*) &opt_flags,1));
  }
  else
  {
    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;
5542
    return my_b_safe_write(file, (byte*) &old_ex, sizeof(old_ex)) != 0;
5543 5544 5545 5546
  }
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5547
/*
5548
  sql_ex_info::init()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5549
*/
5550

5551
char *sql_ex_info::init(char *buf, char *buf_end, bool use_new_format)
5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563
{
  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.
    */
5564 5565 5566 5567 5568 5569
    const char *ptr= buf;
    if (read_str(&ptr, buf_end, (const char **) &field_term, &field_term_len) ||
	read_str(&ptr, buf_end, (const char **) &enclosed,   &enclosed_len) ||
	read_str(&ptr, buf_end, (const char **) &line_term,  &line_term_len) ||
	read_str(&ptr, buf_end, (const char **) &line_start, &line_start_len) ||
	read_str(&ptr, buf_end, (const char **) &escaped,    &escaped_len))
5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595
      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;
}
5596 5597 5598 5599 5600 5601 5602 5603 5604 5605


/**************************************************************************
	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),
5606
    m_row_count(0),
5607 5608
    m_table(tbl_arg),
    m_table_id(tid),
5609 5610
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0),
5611 5612
    m_flags(0)
{
5613 5614
  /*
    We allow a special form of dummy event when the table, and cols
5615
    are null and the table id is ~0UL.  This is a temporary
5616 5617
    solution, to be able to terminate a started statement in the
    binary log: the extreneous events will be removed in the future.
5618
   */
5619 5620
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5621 5622 5623 5624 5625 5626 5627 5628 5629 5630

  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);
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
                          (m_width + 7) & ~7UL,
                          false)))
5631 5632 5633 5634 5635
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
  }
5636
  else
5637 5638 5639 5640
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
5641 5642 5643 5644 5645 5646 5647 5648
}
#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),
5649
    m_row_count(0),
5650 5651 5652 5653 5654 5655
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
{
  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];

5656 5657
  DBUG_PRINT("enter",("event_len: %u  common_header_len: %d  "
		      "post_header_len: %d",
5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670
		      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
  {
5671
    m_table_id= (ulong) uint6korr(post_start);
5672 5673 5674 5675 5676
    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

5677 5678
  byte const *const var_start=
    (const byte *)buf + common_header_len + post_header_len;
5679
  byte const *const ptr_width= var_start;
5680
  uchar *ptr_after_width= (uchar*) ptr_width;
5681
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
5682
  m_width = net_field_length(&ptr_after_width);
5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700
  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,
                          (m_width + 7) & ~7UL,
                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
    ptr_after_width+= (m_width + 7) / 8;
    DBUG_DUMP("m_cols", (char*) m_cols.bitmap, no_bytes_in_map(&m_cols));
  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
5701

5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727
  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));

    /* if bitmap_init fails, catched in is_valid() */
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
                            (m_width + 7) & ~7UL,
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
      ptr_after_width+= (m_width + 7) / 8;
      DBUG_DUMP("m_cols_ai", (char*) m_cols_ai.bitmap, no_bytes_in_map(&m_cols_ai));
    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

  const byte* const ptr_rows_data= (const byte*) ptr_after_width;
5728

5729
  my_size_t const data_size= event_len - (ptr_rows_data - (const byte *) buf);
5730
  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
5731 5732
                     m_table_id, m_flags, m_width, data_size));

5733
  m_rows_buf= (byte*)my_malloc(data_size, MYF(MY_WME));
5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750
  if (likely((bool)m_rows_buf))
  {
    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().
5751
  my_free((gptr)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
5752 5753
}

5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

  char buf[sizeof(m_width)+1];
  char *end= net_store_length(buf, (m_width + 7) / 8);

  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; 
}


5777
#ifndef MYSQL_CLIENT
5778
int Rows_log_event::do_add_row_data(byte *row_data, my_size_t length)
5779 5780 5781 5782 5783 5784
{
  /*
    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
  */
5785
  DBUG_ENTER("Rows_log_event::do_add_row_data");
5786 5787
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
5788 5789 5790 5791 5792
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
5793
  DBUG_DUMP("row_data", (const char*)row_data, min(length, 32));
5794
#endif
5795 5796

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
5797
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
5798 5799 5800
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
5801
  if (static_cast<my_size_t>(m_rows_end - m_rows_cur) <= length)
5802 5803 5804
  {
    my_size_t const block_size= 1024;
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
5805
    my_ptrdiff_t const new_alloc= 
5806
        block_size * ((cur_size + length + block_size - 1) / block_size);
5807

5808
    byte* const new_buf= (byte*)my_realloc((gptr)m_rows_buf, (uint) new_alloc,
5809
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826
    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;
  }

5827
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
5828 5829
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
5830
  m_row_count++;
5831 5832 5833 5834 5835
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
5836
int Rows_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5837
{
5838
  DBUG_ENTER("Rows_log_event::do_apply_event(st_relay_log_info*)");
5839
  int error= 0;
5840
  char const *row_start= (char const *)m_rows_buf;
5841 5842

  /*
5843 5844 5845
    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
5846
    success.
5847
   */
5848
  if (m_table_id == ~0UL)
5849 5850 5851 5852 5853 5854 5855
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

5856
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5857
    close_thread_tables(thd);
5858 5859 5860
    thd->clear_error();
    DBUG_RETURN(0);
  }
5861 5862 5863

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
5864
    do_apply_event(). We still check here to prevent future coding
5865
    errors.
5866 5867 5868 5869
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
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    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.
5874
  */
5875
  if (!thd->lock)
5876
  {
5877 5878
    bool need_reopen= 1; /* To execute the first lap of the loop below */

5879
    /*
5880
      lock_tables() reads the contents of thd->lex, so they must be
5881
      initialized. Contrary to in
5882
      Table_map_log_event::do_apply_event() we don't call
5883
      mysql_init_query() as that may reset the binlog format.
5884
    */
5885
    lex_start(thd);
5886

5887 5888 5889
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
5890 5891
      if (!need_reopen)
      {
5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911
        if (thd->query_error || thd->is_fatal_error)
        {
          /*
            Error reporting borrowed from Query_log_event with many excessive
            simplifications (we don't honour --slave-skip-errors)
          */
          uint actual_error= thd->net.last_errno;
          slave_print_msg(ERROR_LEVEL, rli, actual_error,
                          "Error '%s' in %s event: when locking tables",
                          (actual_error ? thd->net.last_error :
                           "unexpected success or fatal error"),
                          get_type_str());
          thd->is_fatal_error= 1;
        }
        else
        {
          slave_print_msg(ERROR_LEVEL, rli, error,
                         "Error in %s event: when locking tables",
                         get_type_str());
        }
5912
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5913 5914
        DBUG_RETURN(error);
      }
5915

5916
      /*
5917
        So we need to reopen the tables.
5918

5919 5920
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
5921

5922 5923 5924
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
5925

5926 5927
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
5928 5929
       */
      thd->binlog_flush_pending_rows_event(false);
5930 5931
      TABLE_LIST *tables= rli->tables_to_lock;
      close_tables_for_reopen(thd, &tables);
5932

5933 5934
      uint tables_count= rli->tables_to_lock_count;
      if ((error= open_tables(thd, &tables, &tables_count, 0)))
5935 5936 5937 5938 5939 5940 5941 5942 5943
      {
        if (thd->query_error || thd->is_fatal_error)
        {
          /*
            Error reporting borrowed from Query_log_event with many excessive
            simplifications (we don't honour --slave-skip-errors)
          */
          uint actual_error= thd->net.last_errno;
          slave_print_msg(ERROR_LEVEL, rli, actual_error,
5944
                          "Error '%s' on reopening tables",
5945
                          (actual_error ? thd->net.last_error :
5946
                           "unexpected success or fatal error"));
5947 5948
          thd->query_error= 1;
        }
5949
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5950
        DBUG_RETURN(error);
5951
      }
5952
    }
5953 5954 5955 5956 5957 5958 5959 5960 5961 5962

    /*
      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.
    */

    {
5963
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
5964 5965 5966 5967 5968 5969 5970
      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;
          thd->query_error= 1;
5971
          const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5972 5973 5974 5975 5976
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

5977
    /*
5978 5979
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
5980 5981 5982

      We also invalidate the query cache for all the tables, since
      they will now be changed.
5983 5984 5985 5986 5987 5988 5989

      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.
5990
     */
5991
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
5992
    {
5993
      const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
5994
    }
5995 5996 5997
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
5998
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5999 6000
  }

6001 6002
  DBUG_ASSERT(rli->tables_to_lock == NULL && rli->tables_to_lock_count == 0);

6003
  TABLE* table= const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.get_table(m_table_id);
6004 6005 6006 6007 6008

  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
6009
      (this was set up by Table_map_log_event::do_apply_event()
6010
      which tested replicate-* rules).
6011
    */
6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038

    /*
      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);
    /*
      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));

6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049
    /*
      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.
     */
    const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

6050
    error= do_before_row_operations(table);
6051 6052
    while (error == 0 && row_start < (const char*) m_rows_end)
    {
6053 6054
      char const *row_end= NULL;
      if ((error= do_prepare_row(thd, rli, table, row_start, &row_end)))
6055 6056
        break; // We should perform the after-row operation even in
               // the case of error
6057

6058
      DBUG_ASSERT(row_end != NULL); // cannot happen
6059
      DBUG_ASSERT(row_end <= (const char*)m_rows_end);
6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077

      /* 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;
      error= do_exec_row(table);
      table->in_use = old_thd;
      switch (error)
      {
        /* Some recoverable errors */
      case HA_ERR_RECORD_CHANGED:
      case HA_ERR_KEY_NOT_FOUND:	/* Idempotency support: OK if
                                           tuple does not exist */
	error= 0;
      case 0:
	break;

      default:
6078
	slave_print_msg(ERROR_LEVEL, rli, thd->net.last_errno,
6079 6080 6081 6082 6083 6084 6085 6086 6087
                        "Error in %s event: row application failed",
                        get_type_str());
	thd->query_error= 1;
	break;
      }

      row_start= row_end;
    }
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
6088
                    const_cast<RELAY_LOG_INFO*>(rli)->abort_slave= 1;);
6089 6090
    error= do_after_row_operations(table, error);
    if (!cache_stmt)
6091 6092 6093 6094
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
6095 6096 6097 6098
  }

  if (error)
  {                     /* error has occured during the transaction */
6099
    slave_print_msg(ERROR_LEVEL, rli, thd->net.last_errno,
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
6100 6101 6102 6103
                    "Error in %s event: error during transaction execution "
                    "on table %s.%s",
                    get_type_str(), table->s->db.str, 
                    table->s->table_name.str);
6104

tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
6105
     /*
6106 6107 6108 6109 6110 6111 6112 6113
      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.
6114
      rollback at the caller along with sbr.
6115
    */
6116
    thd->reset_current_stmt_binlog_row_based();
6117
    const_cast<RELAY_LOG_INFO*>(rli)->cleanup_context(thd, error);
6118 6119 6120 6121
    thd->query_error= 1;
    DBUG_RETURN(error);
  }

6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160
  /*
    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
      st_relay_log_info::last_event_start_time and all its occurences.
    */
    const_cast<RELAY_LOG_INFO*>(rli)->last_event_start_time= time(0);
  }

  DBUG_RETURN(0);
}

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 " : ""));

6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178
  if (get_flags(STMT_END_F))
  {
    /*
      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);
6179

6180 6181 6182 6183 6184 6185 6186 6187 6188 6189
    /*
      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);
6190

6191 6192 6193 6194 6195 6196 6197 6198 6199 6200
    /*
      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.
    */

6201
    thd->reset_current_stmt_binlog_row_based();
6202
    rli->cleanup_context(thd, 0);
6203 6204
    if (error == 0)
    {
6205 6206 6207 6208 6209 6210 6211
      /*
        Indicate that a statement is finished.
        Step the group log position if we are not in a transaction,
        otherwise increase the event log position.
       */
      rli->stmt_done(log_pos, when);

6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223
      /*
        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
      slave_print_msg(ERROR_LEVEL, rli, error,
6224 6225
                      "Error in %s event: commit of row events failed",
                      get_type_str());
6226
  }
6227
  else
6228
  {
6229
    rli->inc_event_relay_log_pos();
6230 6231
  }

6232
  DBUG_RETURN(error);
6233
}
6234

6235 6236 6237 6238 6239 6240
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
  byte buf[ROWS_HEADER_LEN];	// No need to init the buffer
6241
  DBUG_ASSERT(m_table_id != ~0UL);
6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258
  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.
  */
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6259
  char sbuf[sizeof(m_width)];
6260
  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
6261
  bool res= false;
6262

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6263
  char *const sbuf_end= net_store_length((char*) sbuf, (uint) m_width);
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6264
  DBUG_ASSERT(static_cast<my_size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
6265

6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284
  DBUG_DUMP("m_width", sbuf, sbuf_end - sbuf);
  res= res || my_b_safe_write(file,
                              reinterpret_cast<byte*>(sbuf),
                              sbuf_end - sbuf);

  DBUG_DUMP("m_cols", (char*) m_cols.bitmap, no_bytes_in_map(&m_cols));
  res= res || my_b_safe_write(file,
                              reinterpret_cast<byte*>(m_cols.bitmap),
                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
    DBUG_DUMP("m_cols_ai", (char*) m_cols_ai.bitmap, no_bytes_in_map(&m_cols_ai));
    res= res || my_b_safe_write(file,
                                reinterpret_cast<byte*>(m_cols_ai.bitmap),
                                no_bytes_in_map(&m_cols_ai));
  }
6285
  DBUG_DUMP("rows",(const char *) m_rows_buf, data_size);
6286 6287 6288 6289
  res= res || my_b_safe_write(file, m_rows_buf, (uint) data_size);

  return res;

6290 6291 6292
}
#endif

6293
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6294 6295
void Rows_log_event::pack_info(Protocol *protocol)
{
6296 6297 6298
  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
6299 6300
  my_size_t bytes= my_snprintf(buf, sizeof(buf),
                               "table_id: %lu%s", m_table_id, flagstr);
6301
  protocol->store(buf, bytes, &my_charset_bin);
6302 6303 6304
}
#endif

6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315
#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);
6316 6317 6318
    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
6319 6320 6321 6322 6323
    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
6324 6325
    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
6326 6327 6328 6329
  }
}
#endif

6330
/**************************************************************************
6331
	Table_map_log_event member functions and support functions
6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351
**************************************************************************/

/*
  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)
  : Log_event(thd, 0, is_transactional),
    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),
    m_colcnt(tbl->s->fields), m_coltype(0),
    m_table_id(tid),
    m_flags(flags)
{
6352
  DBUG_ASSERT(m_table_id != ~0UL);
6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364
  /*
    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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6365
  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;);
6366 6367 6368 6369 6370 6371 6372
  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

  /* If malloc fails, catched in is_valid() */
  if ((m_memory= my_malloc(m_colcnt, MYF(MY_WME))))
  {
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6373
    m_coltype= reinterpret_cast<uchar*>(m_memory);
6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397
    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
}
#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
  m_table(NULL),
#endif
  m_memory(NULL)
{
  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];
6398
  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
6399 6400
                     event_len, common_header_len, post_header_len));

6401 6402 6403 6404 6405
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
6406
  DBUG_DUMP("event buffer", buf, event_len);
6407
#endif
6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421

  /* 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);
6422
    m_table_id= (ulong) uint6korr(post_start);
6423 6424 6425
    post_start+= TM_FLAGS_OFFSET;
  }

6426
  DBUG_ASSERT(m_table_id != ~0UL);
6427 6428 6429 6430 6431 6432 6433

  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 */
6434
  byte const *const ptr_dblen= (byte const*)vpart + 0;
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6435
  m_dblen= *(uchar*) ptr_dblen;
6436 6437

  /* Length of database name + counter + terminating null */
6438
  byte const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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6439
  m_tbllen= *(uchar*) ptr_tbllen;
6440 6441

  /* Length of table name + counter + terminating null */
6442
  byte const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
6443 6444
  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
6445

6446
  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
6447 6448 6449
                     m_dblen, (long) (ptr_dblen-(const byte*)vpart), 
                     m_tbllen, (long) (ptr_tbllen-(const byte*)vpart),
                     m_colcnt, (long) (ptr_colcnt-(const byte*)vpart)));
6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460

  /* Allocate mem for all fields in one go. If fails, catched in is_valid() */
  m_memory= my_multi_malloc(MYF(MY_WME),
			    &m_dbnam, m_dblen + 1,
			    &m_tblnam, m_tbllen + 1,
			    &m_coltype, m_colcnt,
			    NULL);

  if (m_memory)
  {
    /* Copy the different parts into their memory */
6461 6462
    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);
6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486
    memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
  }

  DBUG_VOID_RETURN;
}
#endif

Table_map_log_event::~Table_map_log_event()
{
  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)
6487
int Table_map_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
6488
{
6489
  DBUG_ENTER("Table_map_log_event::do_apply_event(st_relay_log_info*)");
6490 6491 6492 6493 6494 6495 6496 6497

  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);

6498
  RPL_TABLE_LIST *table_list;
6499 6500 6501
  char *db_mem, *tname_mem;
  void *const memory=
    my_multi_malloc(MYF(MY_WME),
6502
                    &table_list, sizeof(RPL_TABLE_LIST),
6503 6504 6505 6506
                    &db_mem, NAME_LEN + 1,
                    &tname_mem, NAME_LEN + 1,
                    NULL);

6507 6508
  if (memory == NULL)
    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
6509

6510
  uint dummy_len;
6511 6512 6513 6514 6515 6516 6517 6518 6519
  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);
6520 6521 6522

  int error= 0;

6523 6524 6525 6526 6527 6528
  if (!rpl_filter->db_ok(table_list->db) ||
      (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list)))
  {
    my_free((gptr) memory, MYF(MY_WME));
  }
  else
6529
  {
6530 6531 6532 6533 6534
    /*
      open_tables() reads the contents of thd->lex, so they must be
      initialized, so we should call lex_start(); to be even safer, we
      call mysql_init_query() which does a more complete set of inits.
    */
6535 6536
    lex_start(thd);
    mysql_reset_thd_for_next_command(thd);
6537
    /*
6538 6539 6540
      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.
6541
    */
6542 6543
    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
6544
    {
6545
      thd->set_current_stmt_binlog_row_based();
6546 6547 6548
    }

    /*
6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564
      Open the table if it is not already open and add the table to
      table map.  Note that for any table that should not be
      replicated, a filter is needed.

      The creation of a new TABLE_LIST is used to up-cast the
      table_list consisting of RPL_TABLE_LIST items. This will work
      since the only case where the argument to open_tables() is
      changed, is when thd->lex->query_tables == table_list, i.e.,
      when the statement requires prelocking. Since this is not
      executed when a statement is executed, this case will not occur.
      As a precaution, an assertion is added to ensure that the bad
      case is not a fact.

      Either way, the memory in the list is *never* released
      internally in the open_tables() function, hence we take a copy
      of the pointer to make sure that it's not lost.
6565 6566
    */
    uint count;
6567 6568 6569
    DBUG_ASSERT(thd->lex->query_tables != table_list);
    TABLE_LIST *tmp_table_list= table_list;
    if ((error= open_tables(thd, &tmp_table_list, &count, 0)))
6570
    {
6571
      if (thd->query_error || thd->is_fatal_error)
6572
      {
6573 6574 6575 6576 6577
        /*
          Error reporting borrowed from Query_log_event with many excessive
          simplifications (we don't honour --slave-skip-errors)
        */
        uint actual_error= thd->net.last_errno;
6578 6579 6580 6581 6582 6583
        slave_print_msg(ERROR_LEVEL, rli, actual_error,
                        "Error '%s' on opening table `%s`.`%s`",
                        (actual_error ? thd->net.last_error :
                         "unexpected success or fatal error"),
                        table_list->db, table_list->table_name);
        thd->query_error= 1;
6584
      }
6585
      goto err;
6586 6587
    }

6588
    m_table= table_list->table;
6589 6590 6591 6592 6593 6594 6595

    /*
      This will fail later otherwise, the 'in_use' field should be
      set to the current thread.
    */
    DBUG_ASSERT(m_table->in_use);

6596 6597 6598
    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
6599 6600 6601 6602 6603

      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
      inside st_relay_log_info::clear_tables_to_lock() by calling the
      table_def destructor explicitly.
6604
    */
6605
    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt);
6606
    table_list->m_tabledef_valid= TRUE;
6607 6608

    /*
6609
      We record in the slave's information that the table should be
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6610
      locked by linking the table into the list of tables to lock.
6611
    */
6612
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
6613 6614
    const_cast<RELAY_LOG_INFO*>(rli)->tables_to_lock= table_list;
    const_cast<RELAY_LOG_INFO*>(rli)->tables_to_lock_count++;
6615
    /* 'memory' is freed in clear_tables_to_lock */
6616 6617
  }

6618
  DBUG_RETURN(error);
6619

6620 6621
err:
  my_free((gptr) memory, MYF(MY_WME));
6622 6623
  DBUG_RETURN(error);
}
6624 6625 6626 6627 6628 6629 6630

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

6631 6632 6633 6634 6635
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
6636
  DBUG_ASSERT(m_table_id != ~0UL);
6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656
  byte buf[TABLE_MAP_HEADER_LEN];
  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);

6657 6658
  byte const dbuf[]= { (byte) m_dblen };
  byte const tbuf[]= { (byte) m_tbllen };
6659

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6660
  char cbuf[sizeof(m_colcnt)];
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6661
  char *const cbuf_end= net_store_length((char*) cbuf, (uint) m_colcnt);
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knielsen@mysql.com committed
6662
  DBUG_ASSERT(static_cast<my_size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
6663

6664
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
6665
          my_b_safe_write(file, (const byte*)m_dbnam,   m_dblen+1) ||
6666
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
6667
          my_b_safe_write(file, (const byte*)m_tblnam,  m_tbllen+1) ||
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6668
          my_b_safe_write(file, reinterpret_cast<byte*>(cbuf),
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Merge  
kent@mysql.com committed
6669
                          cbuf_end - (char*) cbuf) ||
6670
          my_b_safe_write(file, reinterpret_cast<byte*>(m_coltype), m_colcnt));
6671 6672 6673 6674 6675 6676 6677 6678 6679 6680
 }
#endif

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

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

6681
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6682 6683 6684
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
6685 6686
    my_size_t bytes= my_snprintf(buf, sizeof(buf),
                                 "table_id: %lu (%s.%s)",
6687
                              m_table_id, m_dbnam, m_tblnam);
6688 6689
    protocol->store(buf, bytes, &my_charset_bin);
}
6690 6691
#endif

6692 6693 6694 6695 6696 6697 6698 6699 6700

#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  if (!print_event_info->short_form)
  {
6701 6702 6703 6704 6705
    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);
6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758
  }
}
#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)
int Write_rows_log_event::do_before_row_operations(TABLE *table)
{
  int error= 0;

  /*
    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;
6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775
  /* 
     Do not raise the error flag in case of hitting to an unique attribute
  */
  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
  */
  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.
  */
  table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
6776 6777 6778 6779 6780
  /*
    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.
  */
6781
  table->file->ha_start_bulk_insert(0);
6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802
  /*
    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).
  */
  table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
  return error;
}

int Write_rows_log_event::do_after_row_operations(TABLE *table, int error)
{
6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816
  int local_error= 0;
  table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
  table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
  /*
    reseting the extra with 
    table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
    fires bug#27077
    todo: explain or fix
  */
  if (local_error= table->file->ha_end_bulk_insert())
  {
    table->file->print_error(local_error, MYF(0));
  }
  return error? error : local_error;
6817 6818
}

6819
int Write_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
6820
                                         TABLE *table,
6821 6822
                                         char const *const row_start,
                                         char const **const row_end)
6823 6824
{
  DBUG_ASSERT(table != NULL);
6825 6826 6827
  DBUG_ASSERT(row_start && row_end);

  int error;
6828 6829
  error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                    &m_master_reclength, table->write_set, WRITE_ROWS_EVENT);
6830
  bitmap_copy(table->read_set, table->write_set);
6831
  return error;
6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876
}

/*
  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;
}

/* Anonymous namespace for template functions/classes */
namespace {

  /*
    Smart pointer that will automatically call my_afree (a macro) when
    the pointer goes out of scope.  This is used so that I do not have
    to remember to call my_afree() before each return.  There is no
    overhead associated with this, since all functions are inline.

    I (Matz) would prefer to use the free function as a template
    parameter, but that is not possible when the "function" is a
    macro.
  */
  template <class Obj>
  class auto_afree_ptr
  {
    Obj* m_ptr;
  public:
    auto_afree_ptr(Obj* ptr) : m_ptr(ptr) { }
    ~auto_afree_ptr() { if (m_ptr) my_afree(m_ptr); }
    void assign(Obj* ptr) {
      /* Only to be called if it hasn't been given a value before. */
      DBUG_ASSERT(m_ptr == NULL);
      m_ptr= ptr;
    }
    Obj* get() { return m_ptr; }
  };

}


6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889
/*
  Copy "extra" columns from record[1] to record[0].

  Copy the extra fields that are not present on the master but are
  present on the slave from record[1] to record[0].  This is used
  after fetching a record that are to be updated, either inside
  replace_record() or as part of executing an update_row().
 */
static int
copy_extra_record_fields(TABLE *table,
                         my_size_t master_reclength,
                         my_ptrdiff_t master_fields)
{
6890
  DBUG_PRINT("info", ("Copying to 0x%lx "
6891
                      "from field %lu at offset %lu "
6892 6893
                      "to field %d at offset %lu",
                      (long) table->record[0],
6894
                      (ulong) master_fields, (ulong) master_reclength,
6895
                      table->s->fields, table->s->reclength));
6896 6897 6898 6899 6900
  /*
    Copying the extra fields of the slave that does not exist on
    master into record[0] (which are basically the default values).
  */
  DBUG_ASSERT(master_reclength <= table->s->reclength);
6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943
  if (master_reclength < table->s->reclength)
    bmove_align(table->record[0] + master_reclength,
                table->record[1] + master_reclength,
                table->s->reclength - master_reclength);
    
  /*
    Bit columns are special.  We iterate over all the remaining
    columns and copy the "extra" bits to the new record.  This is
    not a very good solution: it should be refactored on
    opportunity.

    REFACTORING SUGGESTION (Matz).  Introduce a member function
    similar to move_field_offset() called copy_field_offset() to
    copy field values and implement it for all Field subclasses. Use
    this function to copy data from the found record to the record
    that are going to be inserted.

    The copy_field_offset() function need to be a virtual function,
    which in this case will prevent copying an entire range of
    fields efficiently.
  */
  {
    Field **field_ptr= table->field + master_fields;
    for ( ; *field_ptr ; ++field_ptr)
    {
      /*
        Set the null bit according to the values in record[1]
       */
      if ((*field_ptr)->maybe_null() &&
          (*field_ptr)->is_null_in_record(reinterpret_cast<uchar*>(table->record[1])))
        (*field_ptr)->set_null();
      else
        (*field_ptr)->set_notnull();

      /*
        Do the extra work for special columns.
       */
      switch ((*field_ptr)->real_type())
      {
      default:
        /* Nothing to do */
        break;

6944
      case MYSQL_TYPE_BIT:
6945
        Field_bit *f= static_cast<Field_bit*>(*field_ptr);
6946 6947 6948 6949 6950 6951 6952
        if (f->bit_len > 0)
        {
          my_ptrdiff_t const offset= table->record[1] - table->record[0];
          uchar const bits=
            get_rec_bits(f->bit_ptr + offset, f->bit_ofs, f->bit_len);
          set_rec_bits(bits, f->bit_ptr, f->bit_ofs, f->bit_len);
        }
6953 6954 6955 6956 6957 6958 6959
        break;
      }
    }
  }
  return 0;                                     // All OK
}

6960 6961
#define DBUG_PRINT_BITSET(N,FRM,BS)                \
  do {                                             \
6962 6963 6964 6965 6966 6967 6968
    char buf[256];                                 \
    for (uint i = 0 ; i < (BS)->n_bits ; ++i)      \
      buf[i] = bitmap_is_set((BS), i) ? '1' : '0'; \
    buf[(BS)->n_bits] = '\0';                      \
    DBUG_PRINT((N), ((FRM), buf));                 \
  } while (0)

6969

6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995
/**
   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;
}


6996 6997 6998
/*
  Replace the provided record in the database.

6999 7000 7001 7002 7003 7004 7005 7006
  SYNOPSIS
      replace_record()
      thd    Thread context for writing the record.
      table  Table to which record should be written.
      master_reclength
             Offset to first column that is not present on the master,
             alternatively the length of the record on the master
             side.
7007

7008 7009
  RETURN VALUE
      Error code on failure, 0 on success.
7010

7011 7012 7013 7014
  DESCRIPTION
      Similar to how it is done in mysql_insert(), we first try to do
      a ha_write_row() and of that fails due to duplicated keys (or
      indices), we do an ha_update_row() or a ha_delete_row() instead.
7015 7016
 */
static int
7017 7018 7019
replace_record(THD *thd, TABLE *table,
               ulong const master_reclength,
               uint const master_fields)
7020
{
7021
  DBUG_ENTER("replace_record");
7022 7023 7024 7025 7026 7027
  DBUG_ASSERT(table != NULL && thd != NULL);

  int error;
  int keynum;
  auto_afree_ptr<char> key(NULL);

7028
#ifndef DBUG_OFF
7029
  DBUG_DUMP("record[0]",(const char *) table->record[0], table->s->reclength);
7030 7031 7032 7033
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

7034 7035
  while ((error= table->file->ha_write_row(table->record[0])))
  {
7036 7037 7038 7039 7040
    if (error == HA_ERR_LOCK_DEADLOCK || error == HA_ERR_LOCK_WAIT_TIMEOUT)
    {
      table->file->print_error(error, MYF(0)); /* to check at exec_relay_log_event */
      DBUG_RETURN(error);
    }
7041 7042 7043
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
      /* We failed to retrieve the duplicate key */
7044
      DBUG_RETURN(error);
7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056
    }

    /*
       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.
     */
7057
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
7058
    {
7059
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
7060
      if (error)
7061 7062
      {
        table->file->print_error(error, MYF(0));
7063
        DBUG_RETURN(error);
7064
      }
7065 7066 7067 7068 7069
    }
    else
    {
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
7070
        DBUG_RETURN(my_errno);
7071 7072 7073 7074 7075 7076
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
7077
          DBUG_RETURN(ENOMEM);
7078 7079
      }

7080
      key_copy((byte*)key.get(), table->record[0], table->key_info + keynum, 0);
7081
      error= table->file->index_read_idx(table->record[1], keynum,
7082
                                         (const byte*)key.get(),
7083
                                         HA_WHOLE_KEY,
7084 7085
                                         HA_READ_KEY_EXACT);
      if (error)
7086 7087
      {
        table->file->print_error(error, MYF(0));
7088
        DBUG_RETURN(error);
7089
      }
7090 7091 7092 7093 7094 7095 7096
    }

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

7097 7098 7099
       First we copy the columns into table->record[0] that are not
       present on the master from table->record[1], if there are any.
    */
7100
    copy_extra_record_fields(table, master_reclength, master_fields);
7101

7102
    /*
7103 7104 7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121
       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())
    {
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
7122 7123
      if (error)
        table->file->print_error(error, MYF(0));
7124
      DBUG_RETURN(error);
7125 7126 7127 7128
    }
    else
    {
      if ((error= table->file->ha_delete_row(table->record[1])))
7129 7130
      {
        table->file->print_error(error, MYF(0));
7131
        DBUG_RETURN(error);
7132
      }
7133 7134 7135
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
7136

7137
  DBUG_RETURN(error);
7138 7139 7140 7141 7142
}

int Write_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);
7143
  int error= replace_record(thd, table, m_master_reclength, m_width);
7144 7145 7146 7147 7148 7149 7150
  return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
7151
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
7152 7153 7154 7155 7156 7157 7158 7159
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7160 7161 7162 7163 7164 7165
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
7166
{
7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193
  /*
    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.
   */

  bool result= FALSE;
  byte saved_x[2], saved_filler[2];

  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);
    }
  }

7194
  if (table->s->blob_fields + table->s->varchar_fields == 0)
7195 7196 7197 7198 7199
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

7200 7201 7202 7203
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
7204 7205 7206 7207 7208
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

7209 7210
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
7211
  {
7212
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
7213 7214 7215 7216
    {
      result= TRUE;
      goto record_compare_exit;
    }
7217
  }
7218 7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232

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];
    }
7233
  }
7234 7235

  return result;
7236 7237 7238 7239 7240
}


/*
  Find the row given by 'key', if the table has keys, or else use a table scan
7241 7242 7243 7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260
  to find (and fetch) the row.

  If the engine allows random access of the records, a combination of
  position() and rnd_pos() will be used.

  @param table Pointer to table to search
  @param key   Pointer to key to use for search, if table has key

  @pre <code>table->record[0]</code> shall contain the row to locate
  and <code>key</code> shall contain a key to use for searching, if
  the engine has a key.

  @post If the return value is zero, <code>table->record[1]</code>
  will contain the fetched row and the internal "cursor" will refer to
  the row. If the return value is non-zero,
  <code>table->record[1]</code> is undefined.  In either case,
  <code>table->record[0]</code> is undefined.

  @return Zero if the row was successfully fetched into
  <code>table->record[1]</code>, error code otherwise.
7261
 */
7262

7263
static int find_and_fetch_row(TABLE *table, byte *key)
7264 7265
{
  DBUG_ENTER("find_and_fetch_row(TABLE *table, byte *key, byte *record)");
7266 7267
  DBUG_PRINT("enter", ("table: 0x%lx, key: 0x%lx  record: 0x%lx",
		       (long) table, (long) key, (long) table->record[1]));
7268 7269 7270

  DBUG_ASSERT(table->in_use != NULL);

7271
  DBUG_DUMP("record[0]",(const char *) table->record[0], table->s->reclength);
7272

7273 7274
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
7275 7276 7277 7278 7279 7280
  {
    /*
      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
7281
      the "cursor" (i.e., record[0] in this case) at the correct row.
7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292

      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);

7293 7294
    */
    table->file->position(table->record[0]);
7295 7296 7297 7298 7299 7300 7301
    int error= table->file->rnd_pos(table->record[0], table->file->ref);
    /*
      rnd_pos() returns the record in table->record[0], so we have to
      move it to table->record[1].
     */
    bmove_align(table->record[1], table->record[0], table->s->reclength);
    DBUG_RETURN(error);
7302 7303
  }

tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
7304
  /* We need to retrieve all fields */
7305 7306
  /* TODO: Move this out from this function to main loop */
  table->use_all_columns();
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
7307

7308 7309 7310
  if (table->s->keys > 0)
  {
    int error;
7311
    /* We have a key: search the table using the index */
7312
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
7313
      DBUG_RETURN(error);
7314

7315 7316 7317 7318 7319
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
patg@radha.patg.net's avatar
patg@radha.patg.net committed
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    DBUG_DUMP("table->record[0]", (const char *)table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", (const char *)table->record[1], table->s->reclength);
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#endif

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    /*
      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.
    */
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    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
    table->record[1][pos]= 0xFF;
7333 7334
    if ((error= table->file->index_read(table->record[1], key, HA_WHOLE_KEY,
                                        HA_READ_KEY_EXACT)))
7335 7336
    {
      table->file->print_error(error, MYF(0));
7337
      table->file->ha_index_end();
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      DBUG_RETURN(error);
    }

7341 7342 7343 7344 7345
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
patg@radha.patg.net's avatar
patg@radha.patg.net committed
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    DBUG_DUMP("table->record[0]", (const char *)table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", (const char *)table->record[1], table->s->reclength);
7348
#endif
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    /*
      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.
7362
    */
7363
    if (table->key_info->flags & HA_NOSAME)
7364 7365
    {
      table->file->ha_index_end();
7366
      DBUG_RETURN(0);
7367
    }
7368

7369
    while (record_compare(table))
7370 7371
    {
      int error;
7372

7373 7374 7375 7376 7377
      /*
        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.
7378 7379 7380

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
7381
      */
7382 7383 7384 7385 7386 7387
      if (table->s->null_bytes > 0)
      {
        table->record[1][table->s->null_bytes - 1]|=
          256U - (1U << table->s->last_null_bit_pos);
      }

7388
      if ((error= table->file->index_next(table->record[1])))
7389 7390
      {
	table->file->print_error(error, MYF(0));
7391
        table->file->ha_index_end();
7392 7393 7394
	DBUG_RETURN(error);
      }
    }
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    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
7400 7401 7402 7403
  }
  else
  {
    int restart_count= 0; // Number of times scanning has restarted from top
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    int error;

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
      return error;

    /* Continue until we find the right record or have made a full loop */
7411 7412
    do
    {
7413
      error= table->file->rnd_next(table->record[1]);
7414

7415 7416
      DBUG_DUMP("record[0]",(const char *) table->record[0], table->s->reclength);
      DBUG_DUMP("record[1]",(const char *) table->record[1], table->s->reclength);
7417

7418 7419 7420 7421 7422 7423 7424 7425 7426 7427 7428 7429 7430
      switch (error)
      {
      case 0:
      case HA_ERR_RECORD_DELETED:
	break;

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

      default:
	table->file->print_error(error, MYF(0));
7431
        DBUG_PRINT("info", ("Record not found"));
7432
        table->file->ha_rnd_end();
7433 7434 7435
	DBUG_RETURN(error);
      }
    }
7436
    while (restart_count < 2 && record_compare(table));
7437

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    /*
      Have to restart the scan to be able to fetch the next row.
    */
7441
    DBUG_PRINT("info", ("Record %sfound", restart_count == 2 ? "not " : ""));
7442 7443
    table->file->ha_rnd_end();

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    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
    DBUG_RETURN(error);
  }

  DBUG_RETURN(0);
}
#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)
#ifdef HAVE_REPLICATION
7462
  ,m_memory(NULL), m_key(NULL), m_after_image(NULL)
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#endif
{
}
#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)
#if defined(MYSQL_CLIENT)
  : Rows_log_event(buf, event_len, DELETE_ROWS_EVENT, description_event)
#else
  : Rows_log_event(buf, event_len, DELETE_ROWS_EVENT, description_event),
7479
    m_memory(NULL), m_key(NULL), m_after_image(NULL)
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#endif
{
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int Delete_rows_log_event::do_before_row_operations(TABLE *table)
{
  DBUG_ASSERT(m_memory == NULL);

7490
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
7491 7492 7493
      table->s->primary_key < MAX_KEY)
  {
    /*
7494
      We don't need to allocate any memory for m_after_image and
7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505
      m_key since they are not used.
    */
    return 0;
  }

  int error= 0;

  if (table->s->keys > 0)
  {
    m_memory=
      my_multi_malloc(MYF(MY_WME),
7506
		      &m_after_image, table->s->reclength,
7507 7508 7509 7510 7511
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
7512 7513
    m_after_image= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_after_image;
7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525 7526
    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  return error;
}

int Delete_rows_log_event::do_after_row_operations(TABLE *table, int error)
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
  table->file->ha_index_or_rnd_end();
  my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
7527
  m_memory= NULL;
7528
  m_after_image= NULL;
7529
  m_key= NULL;
7530 7531 7532 7533

  return error;
}

7534
int Delete_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7535
                                          TABLE *table,
7536 7537
                                          char const *const row_start,
                                          char const **const row_end)
7538
{
7539 7540
  int error;
  DBUG_ASSERT(row_start && row_end);
7541 7542 7543 7544 7545 7546
  /*
    This assertion actually checks that there is at least as many
    columns on the slave as on the master.
  */
  DBUG_ASSERT(table->s->fields >= m_width);

7547 7548
  error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                    &m_master_reclength, table->read_set, DELETE_ROWS_EVENT);
7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559
  /*
    If we will access rows using the random access method, m_key will
    be set to NULL, so we do not need to make a key copy in that case.
   */
  if (m_key)
  {
    KEY *const key_info= table->key_info;

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

7560
  return error;
7561 7562 7563 7564
}

int Delete_rows_log_event::do_exec_row(TABLE *table)
{
7565
  int error;
7566 7567
  DBUG_ASSERT(table != NULL);

7568 7569 7570 7571 7572 7573 7574 7575
  if (!(error= find_and_fetch_row(table, m_key)))
  { 
    /*
      Now we should have the right row to delete.  We are using
      record[0] since it is guaranteed to point to a record with the
      correct value.
    */
    error= table->file->ha_delete_row(table->record[0]);
7576
  }
7577 7578 7579 7580 7581 7582 7583 7584 7585
  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)
{
7586
  Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
7587 7588 7589 7590 7591 7592 7593 7594 7595 7596 7597 7598 7599
}
#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,
7600 7601 7602 7603 7604 7605 7606 7607 7608 7609 7610 7611 7612 7613 7614 7615
                                             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)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)

#endif
{
  init(cols_ai);
}

Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                             ulong tid,
                                             MY_BITMAP const *cols,
7616 7617 7618 7619 7620 7621
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)
#endif
{
7622 7623 7624 7625 7626 7627 7628 7629 7630 7631 7632 7633 7634 7635 7636
  init(cols);
}

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
                          (m_width + 7) & ~7UL,
                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
  }
7637 7638 7639
}
#endif /* !defined(MYSQL_CLIENT) */

7640 7641 7642 7643 7644 7645 7646 7647 7648

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().
}


7649 7650 7651 7652 7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677
/*
  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)
#if defined(MYSQL_CLIENT)
  : Rows_log_event(buf, event_len, UPDATE_ROWS_EVENT, description_event)
#else
  : Rows_log_event(buf, event_len, UPDATE_ROWS_EVENT, description_event),
    m_memory(NULL), m_key(NULL)
#endif
{
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int Update_rows_log_event::do_before_row_operations(TABLE *table)
{
  DBUG_ASSERT(m_memory == NULL);

  int error= 0;

  if (table->s->keys > 0)
  {
    m_memory=
      my_multi_malloc(MYF(MY_WME),
7678
		      &m_after_image, table->s->reclength,
7679 7680 7681 7682 7683
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
7684 7685
    m_after_image= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_after_image;
7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700
    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;

  return error;
}

int Update_rows_log_event::do_after_row_operations(TABLE *table, int error)
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
  table->file->ha_index_or_rnd_end();
  my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR));
7701
  m_memory= NULL;
7702
  m_after_image= NULL;
7703
  m_key= NULL;
7704 7705 7706 7707

  return error;
}

7708
int Update_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7709
                                          TABLE *table,
7710 7711
                                          char const *const row_start,
                                          char const **const row_end)
7712
{
7713 7714
  int error;
  DBUG_ASSERT(row_start && row_end);
7715 7716 7717 7718 7719 7720
  /*
    This assertion actually checks that there is at least as many
    columns on the slave as on the master.
  */
  DBUG_ASSERT(table->s->fields >= m_width);

7721 7722 7723 7724 7725 7726
  /*
    We need to perform some juggling below since unpack_row() always
    unpacks into table->record[0]. For more information, see the
    comments for unpack_row().
  */

7727
  /* record[0] is the before image for the update */
7728 7729 7730
  error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                    &m_master_reclength, table->read_set, UPDATE_ROWS_EVENT);
  store_record(table, record[1]);
7731
  char const *next_start = *row_end;
7732
  /* m_after_image is the after image for the update */
7733
  error= unpack_row(rli, table, m_width, next_start, &m_cols_ai, row_end,
7734 7735 7736
                    &m_master_reclength, table->write_set, UPDATE_ROWS_EVENT);
  bmove_align(m_after_image, table->record[0], table->s->reclength);
  restore_record(table, record[1]);
7737

7738 7739 7740 7741 7742
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7743 7744
  DBUG_DUMP("record[0]", (const char *)table->record[0], table->s->reclength);
  DBUG_DUMP("m_after_image", (const char *)m_after_image, table->s->reclength);
7745
#endif
7746

7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757
  /*
    If we will access rows using the random access method, m_key will
    be set to NULL, so we do not need to make a key copy in that case.
   */
  if (m_key)
  {
    KEY *const key_info= table->key_info;

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

7758
  return error;
7759 7760 7761 7762 7763 7764
}

int Update_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);

7765
  int error= find_and_fetch_row(table, m_key);
7766 7767 7768
  if (error)
    return error;

7769
  /*
7770 7771 7772 7773 7774 7775
    We have to ensure that the new record (i.e., the after image) is
    in record[0] and the old record (i.e., the before image) is in
    record[1].  This since some storage engines require this (for
    example, the partition engine).

    Since find_and_fetch_row() puts the fetched record (i.e., the old
7776 7777 7778 7779 7780
    record) in record[1], we can keep it there. We put the new record
    (i.e., the after image) into record[0], and copy the fields that
    are on the slave (i.e., in record[1]) into record[0], effectively
    overwriting the default values that where put there by the
    unpack_row() function.
7781
  */
7782
  bmove_align(table->record[0], m_after_image, table->s->reclength);
7783
  copy_extra_record_fields(table, m_master_reclength, m_width);
7784

7785
  /*
7786 7787 7788 7789
    Now we have the right row to update.  The old row (the one we're
    looking for) is in record[1] and the new row has is in record[0].
    We also have copied the original values already in the slave's
    database into the after image delivered from the master.
7790
  */
7791
  error= table->file->ha_update_row(table->record[1], table->record[0]);
7792 7793 7794 7795 7796 7797 7798 7799 7800

  return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
7801
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
7802 7803 7804
}
#endif

7805 7806 7807 7808 7809 7810 7811 7812 7813 7814 7815 7816 7817 7818 7819 7820 7821

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));

  m_incident= static_cast<Incident>(uint2korr(buf + common_header_len));
  char const *ptr= buf + common_header_len + post_header_len;
  char const *const str_end= buf + event_len;
7822 7823
  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
7824 7825 7826 7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866 7867 7868 7869 7870 7871 7872 7873 7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885
  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));

  DBUG_ASSERT(0 <= m_incident);
  DBUG_ASSERT((my_size_t) m_incident <= sizeof(description)/sizeof(*description));

  return description[m_incident];
}


#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
  my_size_t bytes;
  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
7886
Incident_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
7887
{
7888
  DBUG_ENTER("Incident_log_event::do_apply_event");
7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914
  slave_print_msg(ERROR_LEVEL, rli, ER_SLAVE_INCIDENT,
                  ER(ER_SLAVE_INCIDENT),
                  description(),
                  m_message.length > 0 ? m_message.str : "<none>");
  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));
  byte buf[sizeof(int16)];
  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));
}