log_event.cc 266 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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#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) && !defined(DBUG_OFF) && !defined(_lint)
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static const char *HA_ERR(int i)
{
  switch (i) {
  case HA_ERR_KEY_NOT_FOUND: return "HA_ERR_KEY_NOT_FOUND";
  case HA_ERR_FOUND_DUPP_KEY: return "HA_ERR_FOUND_DUPP_KEY";
  case HA_ERR_RECORD_CHANGED: return "HA_ERR_RECORD_CHANGED";
  case HA_ERR_WRONG_INDEX: return "HA_ERR_WRONG_INDEX";
  case HA_ERR_CRASHED: return "HA_ERR_CRASHED";
  case HA_ERR_WRONG_IN_RECORD: return "HA_ERR_WRONG_IN_RECORD";
  case HA_ERR_OUT_OF_MEM: return "HA_ERR_OUT_OF_MEM";
  case HA_ERR_NOT_A_TABLE: return "HA_ERR_NOT_A_TABLE";
  case HA_ERR_WRONG_COMMAND: return "HA_ERR_WRONG_COMMAND";
  case HA_ERR_OLD_FILE: return "HA_ERR_OLD_FILE";
  case HA_ERR_NO_ACTIVE_RECORD: return "HA_ERR_NO_ACTIVE_RECORD";
  case HA_ERR_RECORD_DELETED: return "HA_ERR_RECORD_DELETED";
  case HA_ERR_RECORD_FILE_FULL: return "HA_ERR_RECORD_FILE_FULL";
  case HA_ERR_INDEX_FILE_FULL: return "HA_ERR_INDEX_FILE_FULL";
  case HA_ERR_END_OF_FILE: return "HA_ERR_END_OF_FILE";
  case HA_ERR_UNSUPPORTED: return "HA_ERR_UNSUPPORTED";
  case HA_ERR_TO_BIG_ROW: return "HA_ERR_TO_BIG_ROW";
  case HA_WRONG_CREATE_OPTION: return "HA_WRONG_CREATE_OPTION";
  case HA_ERR_FOUND_DUPP_UNIQUE: return "HA_ERR_FOUND_DUPP_UNIQUE";
  case HA_ERR_UNKNOWN_CHARSET: return "HA_ERR_UNKNOWN_CHARSET";
  case HA_ERR_WRONG_MRG_TABLE_DEF: return "HA_ERR_WRONG_MRG_TABLE_DEF";
  case HA_ERR_CRASHED_ON_REPAIR: return "HA_ERR_CRASHED_ON_REPAIR";
  case HA_ERR_CRASHED_ON_USAGE: return "HA_ERR_CRASHED_ON_USAGE";
  case HA_ERR_LOCK_WAIT_TIMEOUT: return "HA_ERR_LOCK_WAIT_TIMEOUT";
  case HA_ERR_LOCK_TABLE_FULL: return "HA_ERR_LOCK_TABLE_FULL";
  case HA_ERR_READ_ONLY_TRANSACTION: return "HA_ERR_READ_ONLY_TRANSACTION";
  case HA_ERR_LOCK_DEADLOCK: return "HA_ERR_LOCK_DEADLOCK";
  case HA_ERR_CANNOT_ADD_FOREIGN: return "HA_ERR_CANNOT_ADD_FOREIGN";
  case HA_ERR_NO_REFERENCED_ROW: return "HA_ERR_NO_REFERENCED_ROW";
  case HA_ERR_ROW_IS_REFERENCED: return "HA_ERR_ROW_IS_REFERENCED";
  case HA_ERR_NO_SAVEPOINT: return "HA_ERR_NO_SAVEPOINT";
  case HA_ERR_NON_UNIQUE_BLOCK_SIZE: return "HA_ERR_NON_UNIQUE_BLOCK_SIZE";
  case HA_ERR_NO_SUCH_TABLE: return "HA_ERR_NO_SUCH_TABLE";
  case HA_ERR_TABLE_EXIST: return "HA_ERR_TABLE_EXIST";
  case HA_ERR_NO_CONNECTION: return "HA_ERR_NO_CONNECTION";
  case HA_ERR_NULL_IN_SPATIAL: return "HA_ERR_NULL_IN_SPATIAL";
  case HA_ERR_TABLE_DEF_CHANGED: return "HA_ERR_TABLE_DEF_CHANGED";
  case HA_ERR_NO_PARTITION_FOUND: return "HA_ERR_NO_PARTITION_FOUND";
  case HA_ERR_RBR_LOGGING_FAILED: return "HA_ERR_RBR_LOGGING_FAILED";
  case HA_ERR_DROP_INDEX_FK: return "HA_ERR_DROP_INDEX_FK";
  case HA_ERR_FOREIGN_DUPLICATE_KEY: return "HA_ERR_FOREIGN_DUPLICATE_KEY";
  case HA_ERR_TABLE_NEEDS_UPGRADE: return "HA_ERR_TABLE_NEEDS_UPGRADE";
  case HA_ERR_TABLE_READONLY: return "HA_ERR_TABLE_READONLY";
  case HA_ERR_AUTOINC_READ_FAILED: return "HA_ERR_AUTOINC_READ_FAILED";
  case HA_ERR_AUTOINC_ERANGE: return "HA_ERR_AUTOINC_ERANGE";
  case HA_ERR_GENERIC: return "HA_ERR_GENERIC";
  case HA_ERR_RECORD_IS_THE_SAME: return "HA_ERR_RECORD_IS_THE_SAME";
  case HA_ERR_LOGGING_IMPOSSIBLE: return "HA_ERR_LOGGING_IMPOSSIBLE";
  case HA_ERR_CORRUPT_EVENT: return "HA_ERR_CORRUPT_EVENT";
  }
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  return "<unknown error>";
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}
#endif

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

  DESCRIPTION

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

  typedef unsigned short flag_set;

  /*
    Constructor.

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

    DESCRIPTION

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

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

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

  /*
    Return a pointer to the internal IO_CACHE.

    SYNOPSIS
      operator&()

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

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

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

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#ifndef DBUG_OFF
uint debug_not_change_ts_if_art_event= 1; // bug#29309 simulation
#endif
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/*
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  pretty_print_str()
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*/
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#ifdef MYSQL_CLIENT
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static void pretty_print_str(IO_CACHE* cache, 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, Relay_log_info *rli)
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{
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  thd->is_slave_error = 0;
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  thd->clear_error();
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  rli->clear_error();
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}

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/**
  Ignore error code specified on command line.
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*/
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inline int ignored_error_code(int err_code)
{
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#ifdef HAVE_NDB_BINLOG
  /*
    The following error codes are hard-coded and will always be ignored.
  */
  switch (err_code)
  {
  case ER_DB_CREATE_EXISTS:
  case ER_DB_DROP_EXISTS:
    return 1;
  default:
    /* Nothing to do */
    break;
  }
#endif
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  return ((err_code == ER_SLAVE_IGNORED_TABLE) ||
          (use_slave_mask && bitmap_is_set(&slave_error_mask, err_code)));
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}
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#endif
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/*
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  pretty_print_str()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static char *pretty_print_str(char *packet, 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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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Creates a temporary name for load data infile:.
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  @param buf		      Store new filename here
  @param file_id	      File_id (part of file name)
  @param event_server_id     Event_id (part of file name)
  @param ext		      Extension for file name

  @return
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    Pointer to start of extension
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*/
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static char *slave_load_file_stem(char *buf, uint file_id,
                                  int event_server_id, const char *ext)
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{
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  char *res;
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  fn_format(buf,"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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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Delete all temporary files used for SQL_LOAD.
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*/
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static void cleanup_load_tmpdir()
{
  MY_DIR *dirp;
  FILEINFO *file;
  uint i;
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  char fname[FN_REFLEN], prefbuf[31], *p;
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  if (!(dirp=my_dir(slave_load_tmpdir,MYF(MY_WME))))
    return;

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  /* 
     When we are deleting temporary files, we should only remove
     the files associated with the server id of our server.
     We don't use event_server_id here because since we've disabled
     direct binlogging of Create_file/Append_file/Exec_load events
     we cannot meet Start_log event in the middle of events from one 
     LOAD DATA.
  */
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  p= strmake(prefbuf, STRING_WITH_LEN("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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  uchar tmp[1];
  tmp[0]= (uchar) length;
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  return (my_b_safe_write(file, tmp, sizeof(tmp)) ||
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	  my_b_safe_write(file, (uchar*) str, length));
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}


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

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

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#ifndef MYSQL_CLIENT

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

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

  beg= to->c_ptr_quick() + to->length();
  ptr= beg;
  if (csinfo->escape_with_backslash_is_dangerous)
    ptr= str_to_hex(ptr, from->ptr(), from->length());
  else
  {
    *ptr++= '\'';
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    ptr+= escape_string_for_mysql(csinfo, ptr, 0,
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                                  from->ptr(), from->length());
    *ptr++='\'';
  }
  to->length(orig_len + ptr - beg);
  return 0;
}
#endif

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

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#ifdef MYSQL_CLIENT
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static void print_set_option(IO_CACHE* file, uint32 bits_changed,
                             uint32 option, uint32 flags, const char* name,
                             bool* need_comma)
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{
  if (bits_changed & option)
  {
    if (*need_comma)
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      my_b_printf(file,", ");
    my_b_printf(file,"%s=%d", name, test(flags & option));
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    *need_comma= 1;
  }
}
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#endif
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/**************************************************************************
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	Log_event methods (= the parent class of all events)
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**************************************************************************/
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/**
  @return
  returns the human readable name of the event's type
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*/
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const char* Log_event::get_type_str()
{
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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;
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  /*
    We can't call my_time() here as this would cause a call before
    my_init() is called
  */
  when=		0;
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  log_pos=	0;
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}
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#endif /* !MYSQL_CLIENT */
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/*
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  Log_event::Log_event()
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*/
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Log_event::Log_event(const char* buf,
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                     const Format_description_log_event* description_event)
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  :temp_buf(0), cache_stmt(0)
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{
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#ifndef MYSQL_CLIENT
  thd = 0;
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#endif
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  when = uint4korr(buf);
  server_id = uint4korr(buf + SERVER_ID_OFFSET);
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  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
603

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int Log_event::do_update_pos(Relay_log_info *rli)
605
{
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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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  */
618
  if (rli)
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  {
    /*
      bug#29309 simulation: resetting the flag to force
      wrong behaviour of artificial event to update
      rli->last_master_timestamp for only one time -
      the first FLUSH LOGS in the test.
    */
    DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
                    if (debug_not_change_ts_if_art_event == 1
                        && is_artificial_event())
                    {
                      debug_not_change_ts_if_art_event= 0;
                    });
#ifndef DBUG_OFF
    rli->stmt_done(log_pos, 
                   is_artificial_event() &&
                   debug_not_change_ts_if_art_event > 0 ? 0 : when);
#else
    rli->stmt_done(log_pos, is_artificial_event()? 0 : when);
#endif
    DBUG_EXECUTE_IF("let_first_flush_log_change_timestamp",
                    if (debug_not_change_ts_if_art_event == 0)
                    {
                      debug_not_change_ts_if_art_event= 2;
                    });
  }
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  return 0;                                   // Cannot fail currently
}
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Log_event::enum_skip_reason
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Log_event::do_shall_skip(Relay_log_info *rli)
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{
  DBUG_PRINT("info", ("ev->server_id=%lu, ::server_id=%lu,"
                      " rli->replicate_same_server_id=%d,"
                      " rli->slave_skip_counter=%d",
                      (ulong) server_id, (ulong) ::server_id,
                      rli->replicate_same_server_id,
                      rli->slave_skip_counter));
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  if (server_id == ::server_id && !rli->replicate_same_server_id ||
      rli->slave_skip_counter == 1 && rli->is_in_group())
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    return EVENT_SKIP_IGNORE;
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  else if (rli->slave_skip_counter > 0)
    return EVENT_SKIP_COUNT;
  else
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    return EVENT_SKIP_NOT;
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}
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/*
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  Log_event::pack_info()
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*/
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void Log_event::pack_info(Protocol *protocol)
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{
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  protocol->store("", &my_charset_bin);
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}


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


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

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/*
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  Log_event::write()
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*/
725

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bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
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  uchar header[LOG_EVENT_HEADER_LEN];
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  ulong now;
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  DBUG_ENTER("Log_event::write_header");
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  /* Store number of bytes that will be written by this event */
  data_written= event_data_length + sizeof(header);
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  /*
    log_pos != 0 if this is relay-log event. In this case we should not
    change the position
  */
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  if (is_artificial_event())
  {
    /*
      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;
  }

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

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

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


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/**
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  This needn't be format-tolerant, because we only read
  LOG_EVENT_MINIMAL_HEADER_LEN (we just want to read the event's length).
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*/
804

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int Log_event::read_log_event(IO_CACHE* file, String* packet,
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			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
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  int result=0;
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  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
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  DBUG_ENTER("Log_event::read_log_event");
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  if (log_lock)
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    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (uchar*) buf, sizeof(buf)))
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  {
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    /*
      If the read hits eof, we must report it as eof so the caller
      will know it can go into cond_wait to be woken up on the next
      update to the log.
    */
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    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
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      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
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    goto end;
828
  }
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  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
830
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
832
  {
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    DBUG_PRINT("error",("data_len: %ld", data_len));
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    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
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	     LOG_READ_TOO_LARGE);
    goto end;
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  }
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  /* Append the log event header to packet */
  if (packet->append(buf, sizeof(buf)))
  {
    /* Failed to allocate packet */
    result= LOG_READ_MEM;
    goto end;
  }
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  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
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  if (data_len)
  {
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    /* Append rest of event, read directly from file into packet */
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    if (packet->append(file, data_len))
851
    {
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      /*
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        Fatal error occured when appending rest of the event
        to packet, possible failures:
	1. EOF occured when reading from file, it's really an error
           as data_len is >=0 there's supposed to be more bytes available.
           file->error will have been set to number of bytes left to read
        2. Read was interrupted, file->error would normally be set to -1
        3. Failed to allocate memory for packet, my_errno
           will be ENOMEM(file->error shuold be 0, but since the
           memory allocation occurs before the call to read it might
           be uninitialized)
863
      */
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      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
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      /* Implicit goto end; */
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    }
868
  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
873
  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
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#else
881
#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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#ifndef MYSQL_CLIENT
/**
  @note
888
    Allocates memory;  The caller is responsible for clean-up.
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*/
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
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                                     const Format_description_log_event
                                     *description_event)
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#else
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Log_event* Log_event::read_log_event(IO_CACHE* file,
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                                     const Format_description_log_event
                                     *description_event)
898
#endif
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{
900
  DBUG_ENTER("Log_event::read_log_event");
901
  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
912

913
  LOCK_MUTEX;
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  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
915
  if (my_b_read(file, (uchar *) head, header_size))
916
  {
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    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
920
    /*
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      No error here; it could be that we are at the file's end. However
      if the next my_b_read() fails (below), it will be an error as we
      were able to read the first bytes.
924
    */
925
    DBUG_RETURN(0);
926
  }
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  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
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  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;
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#ifndef max_allowed_packet
  THD *thd=current_thd;
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  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
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#endif
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936
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

942
  if (data_len < header_size)
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  {
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    error = "Event too small";
    goto err;
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  }
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  // some events use the extra byte to null-terminate strings
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  if (!(buf = (char*) my_malloc(data_len+1, MYF(MY_WME))))
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  {
    error = "Out of memory";
    goto err;
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  }
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  buf[data_len] = 0;
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  memcpy(buf, head, header_size);
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  if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
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  if ((res= read_log_event(buf, data_len, &error, description_event)))
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    res->register_temp_buf(buf);
963

964
err:
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  UNLOCK_MUTEX;
966
  if (!res)
967
  {
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    DBUG_ASSERT(error != 0);
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    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
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		    error,data_len,head[EVENT_TYPE_OFFSET]);
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    my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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    /*
      The SQL slave thread will check if file->error<0 to know
      if there was an I/O error. Even if there is no "low-level" I/O errors
      with 'file', any of the high-level above errors is worrying
      enough to stop the SQL thread now ; as we are skipping the current event,
      going on with reading and successfully executing other events can
      only corrupt the slave's databases. So stop.
    */
    file->error= -1;
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  }
983
  DBUG_RETURN(res);
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}

986

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/**
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
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Log_event* Log_event::read_log_event(const char* buf, uint event_len,
				     const char **error,
                                     const Format_description_log_event *description_event)
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{
996 997
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
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  DBUG_ASSERT(description_event != 0);
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  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
1000
  /* Check the integrity */
1001
  if (event_len < EVENT_LEN_OFFSET ||
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      buf[EVENT_TYPE_OFFSET] >= ENUM_END_EVENT ||
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      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
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  }
1008

1009
  switch(buf[EVENT_TYPE_OFFSET]) {
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  case QUERY_EVENT:
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    ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
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    break;
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  case LOAD_EVENT:
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    ev = new Load_log_event(buf, event_len, description_event);
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    break;
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  case NEW_LOAD_EVENT:
1017
    ev = new Load_log_event(buf, event_len, description_event);
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    break;
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  case ROTATE_EVENT:
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    ev = new Rotate_log_event(buf, event_len, description_event);
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    break;
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#ifdef HAVE_REPLICATION
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  case SLAVE_EVENT: /* can never happen (unused event) */
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    ev = new Slave_log_event(buf, event_len);
    break;
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#endif /* HAVE_REPLICATION */
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  case CREATE_FILE_EVENT:
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    ev = new Create_file_log_event(buf, event_len, description_event);
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    break;
  case APPEND_BLOCK_EVENT:
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    ev = new Append_block_log_event(buf, event_len, description_event);
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    break;
  case DELETE_FILE_EVENT:
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    ev = new Delete_file_log_event(buf, event_len, description_event);
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    break;
  case EXEC_LOAD_EVENT:
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    ev = new Execute_load_log_event(buf, event_len, description_event);
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    break;
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  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:
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    ev = new Stop_log_event(buf, description_event);
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    break;
  case INTVAR_EVENT:
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    ev = new Intvar_log_event(buf, description_event);
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    break;
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  case XID_EVENT:
    ev = new Xid_log_event(buf, description_event);
    break;
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  case RAND_EVENT:
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    ev = new Rand_log_event(buf, description_event);
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    break;
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  case USER_VAR_EVENT:
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    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); 
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    break;
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#if defined(HAVE_REPLICATION) 
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  case PRE_GA_WRITE_ROWS_EVENT:
    ev = new Write_rows_log_event_old(buf, event_len, description_event);
    break;
  case PRE_GA_UPDATE_ROWS_EVENT:
    ev = new Update_rows_log_event_old(buf, event_len, description_event);
    break;
  case PRE_GA_DELETE_ROWS_EVENT:
    ev = new Delete_rows_log_event_old(buf, event_len, description_event);
    break;
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  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
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  case BEGIN_LOAD_QUERY_EVENT:
    ev = new Begin_load_query_log_event(buf, event_len, description_event);
    break;
  case EXECUTE_LOAD_QUERY_EVENT:
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    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);
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    break;
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  default:
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    DBUG_PRINT("error",("Unknown event code: %d",
                        (int) buf[EVENT_TYPE_OFFSET]));
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    ev= NULL;
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    break;
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  }
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  DBUG_PRINT("read_event", ("%s(type_code: %d; event_len: %d)",
                            ev ? ev->get_type_str() : "<unknown>",
                            buf[EVENT_TYPE_OFFSET],
                            event_len));
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  /*
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    is_valid() are small event-specific sanity tests which are
    important; for example there are some my_malloc() in constructors
    (e.g. Query_log_event::Query_log_event(char*...)); when these
    my_malloc() fail we can't return an error out of the constructor
    (because constructor is "void") ; so instead we leave the pointer we
    wanted to allocate (e.g. 'query') to 0 and we test it in is_valid().
    Same for Format_description_log_event, member 'post_header_len'.
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  */
1112
  if (!ev || !ev->is_valid())
1113
  {
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    DBUG_PRINT("error",("Found invalid event in binary log"));

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    delete ev;
1117
#ifdef MYSQL_CLIENT
1118
    if (!force_opt) /* then mysqlbinlog dies */
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    {
      *error= "Found invalid event in binary log";
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      DBUG_RETURN(0);
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    }
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    ev= new Unknown_log_event(buf, description_event);
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#else
    *error= "Found invalid event in binary log";
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    DBUG_RETURN(0);
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#endif
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  }
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  DBUG_RETURN(ev);  
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}

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#ifdef MYSQL_CLIENT
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/*
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  Log_event::print_header()
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*/
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void Log_event::print_header(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool is_more __attribute__((unused)))
1141
{
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  char llbuff[22];
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  my_off_t hexdump_from= print_event_info->hexdump_from;
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  DBUG_ENTER("Log_event::print_header");
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  my_b_printf(file, "#");
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  print_timestamp(file);
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  my_b_printf(file, " server id %d  end_log_pos %s ", server_id,
              llstr(log_pos,llbuff));
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  /* mysqlbinlog --hexdump */
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  if (print_event_info->hexdump_from)
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  {
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    my_b_printf(file, "\n");
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    uchar *ptr= (uchar*)temp_buf;
    my_off_t size=
      uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
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    my_off_t i;

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

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

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

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

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  size_t const tmp_str_sz= base64_needed_encoded_length((int) size);
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  char *const tmp_str= (char *) my_malloc(tmp_str_sz, MYF(MY_WME));
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  if (!tmp_str) {
    fprintf(stderr, "\nError: Out of memory. "
            "Could not print correct binlog event.\n");
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    DBUG_VOID_RETURN;
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  }
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  if (base64_encode(ptr, (size_t) size, tmp_str))
  {
    DBUG_ASSERT(0);
  }
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  if (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);
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  my_free(tmp_str, MYF(0));
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  DBUG_VOID_RETURN;
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}


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

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

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


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/**
  Query_log_event::write().
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  @note
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    In this event we have to modify the header to have the correct
    EVENT_LEN_OFFSET as we don't yet know how many status variables we
    will print!
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*/
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bool Query_log_event::write(IO_CACHE* file)
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{
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  /**
    @todo if catalog can be of length FN_REFLEN==512, then we are not
    replicating it correctly, since the length is stored in a byte
    /sven
  */
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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.
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    Now imagine we (write()) are called by the slave SQL thread (we are
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    logging a query executed by this thread; the slave runs with
    --log-slave-updates). Then this query will be logged with
    thread_id=the_thread_id_of_the_SQL_thread. Imagine that 2 temp tables of
    the same name were created simultaneously on the master (in the master
    binlog you have
    CREATE TEMPORARY TABLE t; (thread 1)
    CREATE TEMPORARY TABLE t; (thread 2)
    ...)
    then in the slave's binlog there will be
    CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
    CREATE TEMPORARY TABLE t; (thread_id_of_the_slave_SQL_thread)
    which is bad (same thread id!).

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

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

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  /*
    You MUST always write status vars in increasing order of code. This
    guarantees that a slightly older slave will be able to parse those he
    knows.
  */
  start_of_status= start= buf+QUERY_HEADER_LEN;
  if (flags2_inited)
  {
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    *start++= Q_FLAGS2_CODE;
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    int4store(start, flags2);
    start+= 4;
  }
  if (sql_mode_inited)
  {
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    *start++= Q_SQL_MODE_CODE;
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    int8store(start, (ulonglong)sql_mode);
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    start+= 8;
  }
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  if (catalog_len) // i.e. this var is inited (false for 4.0 events)
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  {
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    write_str_with_code_and_len((char **)(&start),
                                catalog, catalog_len, Q_CATALOG_NZ_CODE);
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    /*
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      In 5.0.x where x<4 masters we used to store the end zero here. This was
      a waste of one byte so we don't do it in x>=4 masters. We change code to
      Q_CATALOG_NZ_CODE, because re-using the old code would make x<4 slaves
      of this x>=4 master segfault (expecting a zero when there is
      none). Remaining compatibility problems are: the older slave will not
      find the catalog; but it is will not crash, and it's not an issue
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      that it does not find the catalog as catalogs were not used in these
      older MySQL versions (we store it in binlog and read it from relay log
      but do nothing useful with it). What is an issue is that the older slave
      will stop processing the Q_* blocks (and jumps to the db/query) as soon
      as it sees unknown Q_CATALOG_NZ_CODE; so it will not be able to read
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      Q_AUTO_INCREMENT*, Q_CHARSET and so replication will fail silently in
      various ways. Documented that you should not mix alpha/beta versions if
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      they are not exactly the same version, with example of 5.0.3->5.0.2 and
      5.0.4->5.0.3. If replication is from older to new, the new will
      recognize Q_CATALOG_CODE and have no problem.
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    */
  }
  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
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    if (command-line-option-which-says-"log_this_variable" && inited)
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    {
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    *start++= Q_THIS_VARIABLE_CODE;
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    int4store(start, this_variable);
    start+= 4;
    }
  */
  
  /* Store length of status variables */
  status_vars_len= (uint) (start-start_of_status);
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  DBUG_ASSERT(status_vars_len <= MAX_SIZE_LOG_EVENT_STATUS);
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  int2store(buf + Q_STATUS_VARS_LEN_OFFSET, status_vars_len);

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

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

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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
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      thd_arg           - thread handle
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      query_arg         - array of char representing the query
      query_length      - size of the  `query_arg' array
      using_trans       - there is a modified transactional table
      suppress_use      - suppress the generation of 'USE' statements
      killed_status_arg - an optional with default to THD::KILLED_NO_VALUE
                          if the value is different from the default, the arg
                          is set to the current thd->killed value.
                          A caller might need to masquerade thd->killed with
                          THD::NOT_KILLED.
  DESCRIPTION
  Creates an event for binlogging
  The value for local `killed_status' can be supplied by caller.
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*/
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Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
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				 ulong query_length, bool using_trans,
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				 bool suppress_use,
                                 THD::killed_state killed_status_arg)
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  :Log_event(thd_arg,
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             (thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F :
              0) |
             (suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0),
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	     using_trans),
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   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
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   db(thd_arg->db), q_len((uint32) query_length),
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   thread_id(thd_arg->thread_id),
   /* save the original thread id; we already know the server id */
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   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
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   auto_increment_offset(thd_arg->variables.auto_increment_offset),
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   lc_time_names_number(thd_arg->variables.lc_time_names->number),
   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 :
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     thd_arg->killed_errno());
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  time(&end_time);
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  exec_time = (ulong) (end_time  - thd_arg->start_time);
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  /**
    @todo this means that if we have no catalog, then it is replicated
    as an existing catalog of length zero. is that safe? /sven
  */
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  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
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  /* status_vars_len is set just before writing the event */
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  db_len = (db) ? (uint32) strlen(db) : 0;
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  if (thd_arg->variables.collation_database != thd_arg->db_charset)
    charset_database_number= thd_arg->variables.collation_database->number;
  
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  /*
    If we don't use flags2 for anything else than options contained in
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    thd_arg->options, it would be more efficient to flags2=thd_arg->options
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    (OPTIONS_WRITTEN_TO_BIN_LOG would be used only at reading time).
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    But it's likely that we don't want to use 32 bits for 3 bits; in the future
    we will probably want to reclaim the 29 bits. So we need the &.
  */
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  flags2= (uint32) (thd_arg->options & OPTIONS_WRITTEN_TO_BIN_LOG);
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  DBUG_ASSERT(thd_arg->variables.character_set_client->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_connection->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_server->number < 256*256);
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  int2store(charset, thd_arg->variables.character_set_client->number);
  int2store(charset+2, thd_arg->variables.collation_connection->number);
  int2store(charset+4, thd_arg->variables.collation_server->number);
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  if (thd_arg->time_zone_used)
  {
    /*
      Note that our event becomes dependent on the Time_zone object
      representing the time zone. Fortunately such objects are never deleted
      or changed during mysqld's lifetime.
    */
    time_zone_len= thd_arg->variables.time_zone->get_name()->length();
    time_zone_str= thd_arg->variables.time_zone->get_name()->ptr();
  }
  else
    time_zone_len= 0;
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  DBUG_PRINT("info",("Query_log_event has flags2: %lu  sql_mode: %lu",
                     (ulong) flags2, sql_mode));
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}
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#endif /* MYSQL_CLIENT */
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/* 2 utility functions for the next method */

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/**
   Read a string with length from memory.

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

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

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

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

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#ifndef DBUG_OFF
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static char const *
code_name(int code)
{
  static char buf[255];
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  switch (code) {
  case Q_FLAGS2_CODE: return "Q_FLAGS2_CODE";
  case Q_SQL_MODE_CODE: return "Q_SQL_MODE_CODE";
  case Q_CATALOG_CODE: return "Q_CATALOG_CODE";
  case Q_AUTO_INCREMENT: return "Q_AUTO_INCREMENT";
  case Q_CHARSET_CODE: return "Q_CHARSET_CODE";
  case Q_TIME_ZONE_CODE: return "Q_TIME_ZONE_CODE";
  case Q_CATALOG_NZ_CODE: return "Q_CATALOG_NZ_CODE";
  case Q_LC_TIME_NAMES_CODE: return "Q_LC_TIME_NAMES_CODE";
  case Q_CHARSET_DATABASE_CODE: return "Q_CHARSET_DATABASE_CODE";
  }
  sprintf(buf, "CODE#%d", code);
  return buf;
}
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#endif
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/**
   Macro to check that there is enough space to read from memory.

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

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

  common_header_len= description_event->common_header_len;
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  post_header_len= description_event->post_header_len[event_type-1];
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  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
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                     event_len, common_header_len, post_header_len));
  
  /*
    We test if the event's length is sensible, and if so we compute data_len.
    We cannot rely on QUERY_HEADER_LEN here as it would not be format-tolerant.
    We use QUERY_HEADER_MINIMAL_LEN which is the same for 3.23, 4.0 & 5.0.
  */
  if (event_len < (uint)(common_header_len + post_header_len))
    DBUG_VOID_RETURN;				
  data_len = event_len - (common_header_len + post_header_len);
  buf+= common_header_len;
  
  slave_proxy_id= thread_id = uint4korr(buf + Q_THREAD_ID_OFFSET);
  exec_time = uint4korr(buf + Q_EXEC_TIME_OFFSET);
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  db_len = (uint)buf[Q_DB_LEN_OFFSET]; // TODO: add a check of all *_len vars
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  error_code = uint2korr(buf + Q_ERR_CODE_OFFSET);

  /*
    5.0 format starts here.
    Depending on the format, we may or not have affected/warnings etc
    The remnent post-header to be parsed has length:
  */
  tmp= post_header_len - QUERY_HEADER_MINIMAL_LEN; 
  if (tmp)
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  {
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    status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
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    /*
      Check if status variable length is corrupt and will lead to very
      wrong data. We could be even more strict and require data_len to
      be even bigger, but this will suffice to catch most corruption
      errors that can lead to a crash.
    */
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    if (status_vars_len > min(data_len, MAX_SIZE_LOG_EVENT_STATUS))
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    {
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      DBUG_PRINT("info", ("status_vars_len (%u) > data_len (%lu); query= 0",
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                          status_vars_len, data_len));
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      query= 0;
      DBUG_VOID_RETURN;
    }
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    data_len-= status_vars_len;
    DBUG_PRINT("info", ("Query_log_event has status_vars_len: %u",
                        (uint) status_vars_len));
    tmp-= 2;
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  }
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  /*
    We have parsed everything we know in the post header for QUERY_EVENT,
    the rest of post header is either comes from older version MySQL or
    dedicated to derived events (e.g. Execute_load_query...)
  */

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  /* variable-part: the status vars; only in MySQL 5.0  */
  
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  start= (Log_event::Byte*) (buf+post_header_len);
  end= (const Log_event::Byte*) (start+status_vars_len);
  for (const Log_event::Byte* pos= start; pos < end;)
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  {
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    switch (*pos++) {
    case Q_FLAGS2_CODE:
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      CHECK_SPACE(pos, end, 4);
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      flags2_inited= 1;
      flags2= uint4korr(pos);
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      DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", (ulong) flags2));
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      pos+= 4;
      break;
    case Q_SQL_MODE_CODE:
    {
#ifndef DBUG_OFF
      char buff[22];
#endif
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      CHECK_SPACE(pos, end, 8);
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      sql_mode_inited= 1;
      sql_mode= (ulong) uint8korr(pos); // QQ: Fix when sql_mode is ulonglong
      DBUG_PRINT("info",("In Query_log_event, read sql_mode: %s",
			 llstr(sql_mode, buff)));
      pos+= 8;
      break;
    }
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    case Q_CATALOG_NZ_CODE:
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      DBUG_PRINT("info", ("case Q_CATALOG_NZ_CODE; pos: 0x%lx; end: 0x%lx",
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                          (ulong) pos, (ulong) end));
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      if (get_str_len_and_pointer(&pos, &catalog, &catalog_len, end))
      {
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        DBUG_PRINT("info", ("query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
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      break;
    case Q_AUTO_INCREMENT:
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      CHECK_SPACE(pos, end, 4);
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      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
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    case Q_CHARSET_CODE:
    {
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      CHECK_SPACE(pos, end, 6);
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      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
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    case Q_TIME_ZONE_CODE:
    {
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      if (get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len, end))
      {
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        DBUG_PRINT("info", ("Q_TIME_ZONE_CODE: query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
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      break;
    }
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    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
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      CHECK_SPACE(pos, end, 1);
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      if ((catalog_len= *pos))
        catalog= (char*) pos+1;                           // Will be copied later
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      CHECK_SPACE(pos, end, catalog_len + 2);
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      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:
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      CHECK_SPACE(pos, end, 2);
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      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
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    case Q_CHARSET_DATABASE_CODE:
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      CHECK_SPACE(pos, end, 2);
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      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)));
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      pos= (const uchar*) end;                         // Break loop
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    }
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  }
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#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))))
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#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))))
1925
#endif
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      DBUG_VOID_RETURN;
1927
  if (catalog_len)                                  // If catalog is given
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  {
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    /**
      @todo we should clean up and do only copy_str_and_move; it
      works for both cases.  Then we can remove the catalog_nz
      flag. /sven
    */
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    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
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      copy_str_and_move(&catalog, &start, catalog_len);
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    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
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      catalog= (const char *)start;
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      start+= catalog_len+1;
    }
1942
  }
1943
  if (time_zone_len)
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    copy_str_and_move(&time_zone_str, &start, time_zone_len);
1945

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

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

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

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

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

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  if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db)
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  {
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    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) 
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      my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
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  }
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  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
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  end= strmov(end, print_event_info->delimiter);
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  *end++='\n';
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  my_b_write(file, (uchar*) buff, (uint) (end-buff));
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  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);
2001

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

    if (unlikely(tmp)) /* some bits have changed */
    {
      bool need_comma= 0;
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      my_b_printf(file, "SET ");
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      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
                   "@@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);
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      my_b_printf(file,"%s\n", print_event_info->delimiter);
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      print_event_info->flags2= flags2;
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    }
  }

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

  if (likely(sql_mode_inited))
  {
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    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
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    {
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      print_event_info->sql_mode_inited= 1;
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      /* force a difference to force write */
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      print_event_info->sql_mode= ~sql_mode;
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    }
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    if (unlikely(print_event_info->sql_mode != sql_mode))
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    {
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      my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
                  (ulong)sql_mode, print_event_info->delimiter);
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      print_event_info->sql_mode= sql_mode;
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    }
  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
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  {
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    my_b_printf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu%s\n",
                auto_increment_increment,auto_increment_offset,
                print_event_info->delimiter);
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    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
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  }

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

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  if (likely(charset_inited))
  {
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    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
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    {
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      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
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    }
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    if (unlikely(bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6)))
2082
    {
2083 2084 2085
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
2086
        /* for mysql client */
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        my_b_printf(file, "/*!\\C %s */%s\n",
                    cs_info->csname, print_event_info->delimiter);
2089
      }
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      my_b_printf(file,"SET "
                  "@@session.character_set_client=%d,"
                  "@@session.collation_connection=%d,"
                  "@@session.collation_server=%d"
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                  "%s\n",
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                  uint2korr(charset),
                  uint2korr(charset+2),
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                  uint2korr(charset+4),
                  print_event_info->delimiter);
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      memcpy(print_event_info->charset, charset, 6);
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    }
  }
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  if (time_zone_len)
  {
2104 2105
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
2106
    {
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      my_b_printf(file,"SET @@session.time_zone='%s'%s\n",
                  time_zone_str, print_event_info->delimiter);
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      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
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    }
  }
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  if (lc_time_names_number != print_event_info->lc_time_names_number)
  {
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    my_b_printf(file, "SET @@session.lc_time_names=%d%s\n",
                lc_time_names_number, print_event_info->delimiter);
2116 2117
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
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  if (charset_database_number != print_event_info->charset_database_number)
  {
    if (charset_database_number)
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      my_b_printf(file, "SET @@session.collation_database=%d%s\n",
                  charset_database_number, print_event_info->delimiter);
2123
    else
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      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
2126 2127
    print_event_info->charset_database_number= charset_database_number;
  }
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}

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

  print_query_header(&cache, print_event_info);
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  my_b_write(&cache, (uchar*) query, q_len);
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  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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}
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#endif /* MYSQL_CLIENT */
2140

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/*
2143
  Query_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2147

2148
int Query_log_event::do_apply_event(Relay_log_info const *rli)
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{
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  return do_apply_event(rli, query, q_len);
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}


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/**
  @todo
  Compare the values of "affected rows" around here. Something
  like:
  @code
     if ((uint32) affected_in_event != (uint32) affected_on_slave)
     {
     sql_print_error("Slave: did not get the expected number of affected \
     rows running query from master - expected %d, got %d (this numbers \
     should have matched modulo 4294967296).", 0, ...);
     thd->query_error = 1;
     }
  @endcode
  We may also want an option to tell the slave to ignore "affected"
  mismatch. This mismatch could be implemented with a new ER_ code, and
  to ignore it you would use --slave-skip-errors...
*/
2171
int Query_log_event::do_apply_event(Relay_log_info const *rli,
2172
                                      const char *query_arg, uint32 q_len_arg)
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{
2174
  LEX_STRING new_db;
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  int expected_error,actual_error= 0;
2176
  /*
2177 2178 2179
    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
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    Query_log_event::do_apply_event()). Same for thd->db.  Thank
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    you.
2182
  */
2183
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
2184 2185 2186
  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' */
2187 2188
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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2190
  /*
2191 2192 2193 2194 2195 2196 2197 2198
    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.
2199
  */
2200
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
2201 2202
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

2203 2204
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
  const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
2205

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  /*
    Note:   We do not need to execute reset_one_shot_variables() if this
            db_ok() test fails.
    Reason: The db stored in binlog events is the same for SET and for
            its companion query.  If the SET is ignored because of
            db_ok(), the companion query will also be ignored, and if
            the companion query is ignored in the db_ok() test of
2213
            ::do_apply_event(), then the companion SET also have so
2214
            we don't need to reset_one_shot_variables().
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  */
2216
  if (rpl_filter->db_ok(thd->db))
2217 2218
  {
    thd->set_time((time_t)when);
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    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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    VOID(pthread_mutex_lock(&LOCK_thread_count));
2222
    thd->query_id = next_query_id();
2223
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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    DBUG_PRINT("query",("%s",thd->query));
2226

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    if (ignored_error_code((expected_error= error_code)) ||
2228
	!check_expected_error(thd,rli,expected_error))
2229 2230 2231
    {
      if (flags2_inited)
        /*
2232 2233
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
2234
        */
2235
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
2236 2237
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
2238 2239
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
2240 2241 2242 2243 2244
      */
      /*
        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
2245 2246 2247
        one has a disk problem so that you temporarily need
        IGNORE_DIR_IN_CREATE on this machine; you don't want it to propagate
        elsewhere (you don't want all slaves to start ignoring the dirs).
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      */
      if (sql_mode_inited)
        thd->variables.sql_mode=
          (ulong) ((thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE) |
                   (sql_mode & ~(ulong) MODE_NO_DIR_IN_CREATE));
      if (charset_inited)
      {
        if (rli->cached_charset_compare(charset))
        {
          /* Verify that we support the charsets found in the event. */
          if (!(thd->variables.character_set_client=
                get_charset(uint2korr(charset), MYF(MY_WME))) ||
              !(thd->variables.collation_connection=
                get_charset(uint2korr(charset+2), MYF(MY_WME))) ||
              !(thd->variables.collation_server=
                get_charset(uint2korr(charset+4), MYF(MY_WME))))
          {
            /*
2266 2267 2268 2269
              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).
2270
            */
2271
            set_slave_thread_default_charset(thd, rli);
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            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
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      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
2280
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
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        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
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      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;
2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314
      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;
      
2315
      /* Execute the query (note that we bypass dispatch_command()) */
2316 2317
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
2318
      log_slow_statement(thd);
2319
    }
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    else
    {
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      /*
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        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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      */
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      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
2330
        clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
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      else
2332
      {
2333
        rli->report(ERROR_LEVEL, expected_error, 
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                          "\
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Query partially completed on the master (error on master: %d) \
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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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START SLAVE; . Query: '%s'", expected_error, thd->query);
2340
        thd->is_slave_error= 1;
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      }
      goto end;
    }
2344

2345 2346
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
2347
      general_log_write(thd, COM_QUERY, thd->query, thd->query_length);
2348

2349
compare_errors:
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     /*
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      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",
2356
 		       expected_error, thd->net.last_errno));
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    if ((expected_error != (actual_error= thd->net.last_errno)) &&
2358 2359 2360
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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    {
2362
      rli->report(ERROR_LEVEL, 0,
2363 2364
                      "\
Query caused different errors on master and slave.     \
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Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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Default database: '%s'. Query: '%s'",
2367 2368 2369 2370 2371
                      ER_SAFE(expected_error),
                      expected_error,
                      actual_error ? thd->net.last_error: "no error",
                      actual_error,
                      print_slave_db_safe(db), query_arg);
2372
      thd->is_slave_error= 1;
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    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
2378
 	     ignored_error_code(actual_error))
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    {
      DBUG_PRINT("info",("error ignored"));
2381
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
2382
      thd->killed= THD::NOT_KILLED;
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    }
    /*
      Other cases: mostly we expected no error and get one.
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    */
2387
    else if (thd->is_slave_error || thd->is_fatal_error)
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    {
2389
      rli->report(ERROR_LEVEL, actual_error,
2390 2391 2392 2393
                      "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);
2394
      thd->is_slave_error= 1;
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    }
2396 2397 2398 2399 2400 2401 2402 2403 2404

    /*
      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, ...);
2405
      thd->is_slave_error = 1;
2406 2407 2408 2409
      }
      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...
2410

2411 2412 2413 2414 2415 2416 2417
      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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  } /* End of if (db_ok(... */

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end:
2421
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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  /*
    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
2428 2429 2430
    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.
2431
  */
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  thd->catalog= 0;
2433
  thd->set_db(NULL, 0);                 /* will free the current database */
2434
  DBUG_PRINT("info", ("end: query= 0"));
2435
  thd->query= 0;			// just to be sure
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  thd->query_length= 0;
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  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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  close_thread_tables(thd);      
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  /*
    As a disk space optimization, future masters will not log an event for
    LAST_INSERT_ID() if that function returned 0 (and thus they will be able
    to replace the THD::stmt_depends_on_first_successful_insert_id_in_prev_stmt
    variable by (THD->first_successful_insert_id_in_prev_stmt > 0) ; with the
    resetting below we are ready to support that.
  */
  thd->first_successful_insert_id_in_prev_stmt_for_binlog= 0;
  thd->first_successful_insert_id_in_prev_stmt= 0;
  thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 0;
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  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
2450
  return thd->is_slave_error;
2451 2452
}

2453
int Query_log_event::do_update_pos(Relay_log_info *rli)
2454
{
2455
  /*
2456 2457 2458
    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.
2459
  */
2460 2461 2462 2463 2464 2465 2466
  if (thd->one_shot_set)
  {
    rli->inc_event_relay_log_pos();
    return 0;
  }
  else
    return Log_event::do_update_pos(rli);
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}
2468 2469


2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
Log_event::enum_skip_reason
Query_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Query_log_event::do_shall_skip");
  DBUG_PRINT("debug", ("query: %s; q_len: %d", query, q_len));
  DBUG_ASSERT(query && q_len > 0);

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

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

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#endif
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/**************************************************************************
	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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/**************************************************************************
2513
	Start_log_event_v3 methods
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**************************************************************************/
2515

2516
#ifndef MYSQL_CLIENT
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Start_log_event_v3::Start_log_event_v3()
  :Log_event(), created(0), binlog_version(BINLOG_VERSION),
   artificial_event(0), dont_set_created(0)
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{
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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/*
2526
  Start_log_event_v3::pack_info()
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*/
2528

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Start_log_event_v3::pack_info(Protocol *protocol)
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{
2532 2533 2534 2535
  char buf[12 + ST_SERVER_VER_LEN + 14 + 22], *pos;
  pos= strmov(buf, "Server ver: ");
  pos= strmov(pos, server_version);
  pos= strmov(pos, ", Binlog ver: ");
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  pos= int10_to_str(binlog_version, pos, 10);
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
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}
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#endif
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/*
2543
  Start_log_event_v3::print()
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*/
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#ifdef MYSQL_CLIENT
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void Start_log_event_v3::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
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  DBUG_ENTER("Start_log_event_v3::print");

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

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  if (!print_event_info->short_form)
2555
  {
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    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tStart: binlog v %d, server v %s created ",
                binlog_version, server_version);
    print_timestamp(&cache);
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    if (created)
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      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
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    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
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      my_b_printf(&cache, "# Warning: this binlog was not closed properly. "
                  "Most probably mysqld crashed writing it.\n");
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  }
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  if (!artificial_event && created)
  {
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#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
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    /*
      This is for mysqlbinlog: like in replication, we want to delete the stale
      tmp files left by an unclean shutdown of mysqld (temporary tables)
      and rollback unfinished transaction.
      Probably this can be done with RESET CONNECTION (syntax to be defined).
    */
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    my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
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#else
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    my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
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#endif
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  }
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  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
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/*
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  Start_log_event_v3::Start_log_event_v3()
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*/
2588

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Start_log_event_v3::Start_log_event_v3(const char* buf,
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                                       const Format_description_log_event
                                       *description_event)
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  :Log_event(buf, description_event)
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{
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  buf+= description_event->common_header_len;
  binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
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  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
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  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
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  created= uint4korr(buf+ST_CREATED_OFFSET);
  /* We use log_pos to mark if this was an artificial event or not */
  artificial_event= (log_pos == 0);
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  dont_set_created= 1;
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}

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/*
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  Start_log_event_v3::write()
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*/
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#ifndef MYSQL_CLIENT
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bool Start_log_event_v3::write(IO_CACHE* file)
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{
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  char buff[START_V3_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy(buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
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  if (!dont_set_created)
    created= when= get_time();
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  int4store(buff + ST_CREATED_OFFSET,created);
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  return (write_header(file, sizeof(buff)) ||
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          my_b_safe_write(file, (uchar*) buff, sizeof(buff)));
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}
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#endif
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Start_log_event_v3::do_apply_event() .
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  The master started

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    IMPLEMENTATION
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    - To handle the case where the master died without having time to write
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    DROP TEMPORARY TABLE, DO RELEASE_LOCK (prepared statements' deletion is
    TODO), we clean up all temporary tables that we got, if we are sure we
    can (see below).
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  @todo
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    - Remove all active user locks.
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    Guilhem 2003-06: this is true but not urgent: the worst it can cause is
    the use of a bit of memory for a user lock which will not be used
    anymore. If the user lock is later used, the old one will be released. In
    other words, no deadlock problem.
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*/

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int Start_log_event_v3::do_apply_event(Relay_log_info const *rli)
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{
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  DBUG_ENTER("Start_log_event_v3::do_apply_event");
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  switch (binlog_version)
  {
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  case 3:
  case 4:
    /*
      This can either be 4.x (then a Start_log_event_v3 is only at master
      startup so we are sure the master has restarted and cleared his temp
      tables; the event always has 'created'>0) or 5.0 (then we have to test
      'created').
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    */
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    if (created)
    {
      close_temporary_tables(thd);
      cleanup_load_tmpdir();
    }
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    break;

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    /*
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       Now the older formats; in that case load_tmpdir is cleaned up by the I/O
       thread.
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    */
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  case 1:
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    if (strncmp(rli->relay_log.description_event_for_exec->server_version,
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                "3.23.57",7) >= 0 && created)
    {
      /*
        Can distinguish, based on the value of 'created': this event was
        generated at master startup.
      */
      close_temporary_tables(thd);
    }
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    /*
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      Otherwise, can't distinguish a Start_log_event generated at
      master startup and one generated by master FLUSH LOGS, so cannot
      be sure temp tables have to be dropped. So do nothing.
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    */
    break;
  default:
    /* this case is impossible */
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    DBUG_RETURN(1);
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  }
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  DBUG_RETURN(0);
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
2693

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

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/**
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  Format_description_log_event 1st ctor.

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

Format_description_log_event::
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Format_description_log_event(uint8 binlog_ver, const char* server_ver)
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  :Start_log_event_v3()
{
  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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}


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

Format_description_log_event::
Format_description_log_event(const char* buf,
                             uint event_len,
                             const
                             Format_description_log_event*
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                             description_event)
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  :Start_log_event_v3(buf, description_event)
{
  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() */
2854
  post_header_len= (uint8*) my_memdup((uchar*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
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                                      number_of_event_types*
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                                      sizeof(*post_header_len), MYF(0));
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  calc_server_version_split();
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  DBUG_VOID_RETURN;
}

2861
#ifndef MYSQL_CLIENT
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bool Format_description_log_event::write(IO_CACHE* file)
{
  /*
    We don't call Start_log_event_v3::write() because this would make 2
    my_b_safe_write().
  */
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  uchar buff[FORMAT_DESCRIPTION_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
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  if (!dont_set_created)
    created= when= get_time();
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  int4store(buff + ST_CREATED_OFFSET,created);
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  buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
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  memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (uchar*) post_header_len,
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         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
2881

2882
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2883
int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
2884
{
2885
  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 */
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    rli->report(INFORMATION_LEVEL, 0,
                "Rolling back unfinished transaction (no COMMIT "
                "or ROLLBACK in relay log). A probable cause is that "
                "the master died while writing the transaction to "
                "its binary log, thus rolled back too."); 
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    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 1);
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  }
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#endif
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  /*
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    If this event comes from ourselves, there is no cleaning task to
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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);
}

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

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

      If we do not skip stepping the group log position (and the
      server id was changed when restarting the server), it might well
      be that we start executing at a position that is invalid, e.g.,
      at a Rows_log_event or a Query_log_event preceeded by a
      Intvar_log_event instead of starting at a Table_map_log_event or
      the Intvar_log_event respectively.
     */
    rli->inc_event_relay_log_pos();
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    return 0;
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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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}
2966

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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'"
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    21 + sql_ex.line_term_len*4 + 2 +       // " LINES TERMINATED BY 'str'"
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    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'"
    15 + 22 +                               // " IGNORE xxx  LINES"
3036
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
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}
3038

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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)
3046
  {
3047 3048
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
3050
  }
3051

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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 '");
3060
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
3062

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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)
3066 3067
    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);
3084

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
3087

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
3090 3091
  if (sql_ex.line_start_len)
  {
3092
    pos= strmov(pos, " STARTING BY ");
3093
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
3094
  }
3095

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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);
3100 3101
    pos= strmov(pos," LINES ");    
  }
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  if (num_fields)
  {
    uint i;
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    const char *field= fields;
3107
    pos= strmov(pos, " (");
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    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
3115
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
3118
    }
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    *pos++= ')';
3120
  }
3121

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  *end= pos;
}


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

3130
  if (!(buf= (char*) my_malloc(get_query_buffer_length(), MYF(MY_WME))))
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    return;
  print_query(TRUE, buf, &end, 0, 0);
  protocol->store(buf, end-buf, &my_charset_bin);
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  my_free(buf, MYF(0));
3135
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3137

3138

3139 3140
#ifndef MYSQL_CLIENT

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/*
3142
  Load_log_event::write_data_header()
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*/
3144

3145
bool Load_log_event::write_data_header(IO_CACHE* file)
3146
{
3147
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
3149 3150 3151 3152 3153
  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);
3154
  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
3155
}
3156

3157

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/*
3159
  Load_log_event::write_data_body()
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*/
3161

3162
bool Load_log_event::write_data_body(IO_CACHE* file)
3163
{
3164 3165 3166
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
3167
  {
3168 3169
    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
3170
      return 1;
3171
  }
3172 3173 3174
  return (my_b_safe_write(file, (uchar*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (uchar*)db, db_len + 1) ||
	  my_b_safe_write(file, (uchar*)fname, fname_len));
3175 3176
}

3177

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/*
3179
  Load_log_event::Load_log_event()
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*/
3181

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Load_log_event::Load_log_event(THD *thd_arg, sql_exchange *ex,
			       const char *db_arg, const char *table_name_arg,
			       List<Item> &fields_arg,
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			       enum enum_duplicates handle_dup,
3186
			       bool ignore, bool using_trans)
3187
  :Log_event(thd_arg,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
3189
             using_trans),
3190
   thread_id(thd_arg->thread_id),
3191
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
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   table_name(table_name_arg ? table_name_arg : ""),
3195
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
3199
  exec_time = (ulong) (end_time  - thd_arg->start_time);
3200 3201 3202
  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
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  fname_len = (fname) ? (uint) strlen(fname) : 0;
  sql_ex.field_term = (char*) ex->field_term->ptr();
  sql_ex.field_term_len = (uint8) ex->field_term->length();
  sql_ex.enclosed = (char*) ex->enclosed->ptr();
  sql_ex.enclosed_len = (uint8) ex->enclosed->length();
  sql_ex.line_term = (char*) ex->line_term->ptr();
  sql_ex.line_term_len = (uint8) ex->line_term->length();
  sql_ex.line_start = (char*) ex->line_start->ptr();
  sql_ex.line_start_len = (uint8) ex->line_start->length();
  sql_ex.escaped = (char*) ex->escaped->ptr();
  sql_ex.escaped_len = (uint8) ex->escaped->length();
  sql_ex.opt_flags = 0;
  sql_ex.cached_new_format = -1;
3216
    
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  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
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  if (ex->opt_enclosed)
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    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
3221

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  sql_ex.empty_flags= 0;
3223

3224
  switch (handle_dup) {
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  case DUP_REPLACE:
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    sql_ex.opt_flags|= REPLACE_FLAG;
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    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
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  }
3232 3233
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
3234

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  if (!ex->field_term->length())
    sql_ex.empty_flags |= FIELD_TERM_EMPTY;
  if (!ex->enclosed->length())
    sql_ex.empty_flags |= ENCLOSED_EMPTY;
  if (!ex->line_term->length())
    sql_ex.empty_flags |= LINE_TERM_EMPTY;
  if (!ex->line_start->length())
    sql_ex.empty_flags |= LINE_START_EMPTY;
  if (!ex->escaped->length())
    sql_ex.empty_flags |= ESCAPED_EMPTY;
3245
    
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  skip_lines = ex->skip_lines;
3247

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  List_iterator<Item> li(fields_arg);
  field_lens_buf.length(0);
  fields_buf.length(0);
  Item* item;
  while ((item = li++))
  {
    num_fields++;
    uchar len = (uchar) strlen(item->name);
    field_block_len += len + 1;
    fields_buf.append(item->name, len + 1);
    field_lens_buf.append((char*)&len, 1);
3259 3260
  }

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
3265

3266

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/**
  @note
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    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
3271
*/
3272 3273 3274 3275
Load_log_event::Load_log_event(const char *buf, uint event_len,
                               const Format_description_log_event *description_event)
  :Log_event(buf, description_event), num_fields(0), fields(0),
   field_lens(0),field_block_len(0),
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   table_name(0), db(0), fname(0), local_fname(FALSE)
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{
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  DBUG_ENTER("Load_log_event");
3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290
  /*
    I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
    4.0->5.0 and 5.0->5.0 and it works.
  */
  if (event_len)
    copy_log_event(buf, event_len,
                   ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                    LOAD_HEADER_LEN + 
                    description_event->common_header_len :
                    LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
                   description_event);
  /* otherwise it's a derived class, will call copy_log_event() itself */
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  DBUG_VOID_RETURN;
3292 3293
}

3294

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/*
3296
  Load_log_event::copy_log_event()
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*/
3298

3299
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
3300 3301
                                   int body_offset,
                                   const Format_description_log_event *description_event)
3302
{
3303
  DBUG_ENTER("Load_log_event::copy_log_event");
3304
  uint data_len;
3305
  char* buf_end = (char*)buf + event_len;
3306 3307
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
3309 3310 3311 3312 3313
  exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
  skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
  table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];
  db_len = (uint)data_head[L_DB_LEN_OFFSET];
  num_fields = uint4korr(data_head + L_NUM_FIELDS_OFFSET);
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  if ((int) event_len < body_offset)
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    DBUG_RETURN(1);
3317 3318 3319 3320
  /*
    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.
  */
3321 3322 3323
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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    DBUG_RETURN(1);
3325
  
3326
  data_len = event_len - body_offset;
3327
  if (num_fields > data_len) // simple sanity check against corruption
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    DBUG_RETURN(1);
3329
  for (uint i = 0; i < num_fields; i++)
3330
    field_block_len += (uint)field_lens[i] + 1;
3331

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  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
3336 3337
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
3338

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  DBUG_RETURN(0);
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}


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/*
3344
  Load_log_event::print()
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*/
3346 3347

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

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3354
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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			   bool commented)
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{
3357 3358
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  DBUG_ENTER("Load_log_event::print");
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  if (!print_event_info->short_form)
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  {
3362 3363 3364
    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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  }

3367
  bool different_db= 1;
3368
  if (db)
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  {
3370 3371 3372 3373 3374 3375
    /*
      If the database is different from the one of the previous statement, we
      need to print the "use" command, and we update the last_db.
      But if commented, the "use" is going to be commented so we should not
      update the last_db.
    */
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    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
3377
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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  }
3380
  
3381
  if (db && db[0] && different_db)
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    my_b_printf(&cache, "%suse %s%s\n", 
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            commented ? "# " : "",
3384
            db, print_event_info->delimiter);
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3386
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
3388 3389
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
3390
  my_b_printf(&cache, "%sLOAD DATA ",
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              commented ? "# " : "");
3392
  if (check_fname_outside_temp_buf())
3393 3394
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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  if (sql_ex.opt_flags & REPLACE_FLAG)
3397
    my_b_printf(&cache," REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
3399
    my_b_printf(&cache," IGNORE ");
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3401 3402 3403
  my_b_printf(&cache, "INTO TABLE `%s`", table_name);
  my_b_printf(&cache, " FIELDS TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.field_term, sql_ex.field_term_len);
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  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
3406 3407 3408
    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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  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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3413 3414
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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3417
  if (sql_ex.line_start)
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  {
3419 3420
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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  }
3422
  if ((long) skip_lines > 0)
3423
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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3425 3426 3427 3428
  if (num_fields)
  {
    uint i;
    const char* field = fields;
3429
    my_b_printf(&cache, " (");
3430
    for (i = 0; i < num_fields; i++)
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    {
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      if (i)
3433 3434
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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3436
      field += field_lens[i]  + 1;
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    }
3438
    my_b_printf(&cache, ")");
3439
  }
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  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
3445

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#ifndef MYSQL_CLIENT
3447

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/**
3449
  Load_log_event::set_fields()
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  @note
    This function can not use the member variable 
    for the database, since LOAD DATA INFILE on the slave
    can be for a different database than the current one.
    This is the reason for the affected_db argument to this method.
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*/
3457

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void Load_log_event::set_fields(const char* affected_db, 
3459 3460
				List<Item> &field_list,
                                Name_resolution_context *context)
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{
  uint i;
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  const char* field = fields;
3464
  for (i= 0; i < num_fields; i++)
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  {
3466 3467
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
3468
    field+= field_lens[i]  + 1;
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  }
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}
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#endif /* !MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Does the data loading job when executing a LOAD DATA on the slave.

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

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

  @retval
3499
    0           Success
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3500 3501
  @retval
    1           Failure
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3502
*/
3503

3504
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
3505
                                   bool use_rli_only_for_errors)
3506
{
3507 3508 3509 3510
  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);
3511
  DBUG_ASSERT(thd->query == 0);
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3512
  thd->query_length= 0;                         // Should not be needed
3513
  thd->is_slave_error= 0;
3514
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
3515

3516
  /* see Query_log_event::do_apply_event() and BUG#13360 */
3517
  DBUG_ASSERT(!rli->m_table_map.count());
3518
  /*
3519
    Usually lex_start() is called by mysql_parse(), but we need it here
3520 3521
    as the present method does not call mysql_parse().
  */
3522 3523 3524
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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3525
  if (!use_rli_only_for_errors)
3526
  {
3527 3528
    /*
      Saved for InnoDB, see comment in
3529
      Query_log_event::do_apply_event()
3530
    */
3531
    const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
3532
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
3533
  }
3534 3535
 
   /*
3536 3537 3538 3539 3540 3541 3542
    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
3543
    done by testing rules in Create_file_log_event::do_apply_event()
3544 3545 3546
    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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3547 3548 3549 3550 3551 3552 3553 3554


    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
3555
            ::do_apply_event(), then the companion SET also have so
3556
            we don't need to reset_one_shot_variables().
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3557
  */
3558
  if (rpl_filter->db_ok(thd->db))
3559
  {
3560 3561
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
3562
    thd->query_id = next_query_id();
3563
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
3564 3565 3566 3567 3568 3569
    /*
      Initing thd->row_count is not necessary in theory as this variable has no
      influence in the case of the slave SQL thread (it is used to generate a
      "data truncated" warning but which is absorbed and never gets to the
      error log); still we init it to avoid a Valgrind message.
    */
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    mysql_reset_errors(thd, 0);
3571 3572 3573

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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    tables.db= thd->strmake(thd->db, thd->db_length);
3575
    tables.alias = tables.table_name = (char*) table_name;
3576
    tables.lock_type = TL_WRITE;
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    tables.updating= 1;
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3578

3579
    // the table will be opened in mysql_load    
3580
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
3581 3582 3583 3584 3585 3586 3587 3588
    {
      // TODO: this is a bug - this needs to be moved to the I/O thread
      if (net)
        skip_load_data_infile(net);
    }
    else
    {
      char llbuff[22];
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3589
      char *end;
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3590
      enum enum_duplicates handle_dup;
3591
      bool ignore= 0;
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3592 3593
      char *load_data_query;

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3594
      /*
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3595 3596
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
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3597
      */
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3598
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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      {
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3600 3601 3602 3603 3604
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
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3605
      }
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3606 3607 3608 3609 3610 3611 3612

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

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3613
      if (sql_ex.opt_flags & REPLACE_FLAG)
3614
      {
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3615
	handle_dup= DUP_REPLACE;
3616
      }
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3617
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3618 3619 3620 3621
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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3622
      else
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3623
      {
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3624
        /*
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3625
	  When replication is running fine, if it was DUP_ERROR on the
3626
          master then we could choose IGNORE here, because if DUP_ERROR
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3627
          suceeded on master, and data is identical on the master and slave,
3628
          then there should be no uniqueness errors on slave, so IGNORE is
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3629
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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3630 3631 3632
          (because the data on the master and slave happen to be different
	  (user error or bug), we want LOAD DATA to print an error message on
	  the slave to discover the problem.
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3633 3634

          If reading from net (a 3.23 master), mysql_load() will change this
3635
          to IGNORE.
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3636 3637
        */
        handle_dup= DUP_ERROR;
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3638
      }
3639 3640 3641 3642 3643 3644 3645 3646 3647 3648
      /*
        We need to set thd->lex->sql_command and thd->lex->duplicates
        since InnoDB tests these variables to decide if this is a LOAD
        DATA ... REPLACE INTO ... statement even though mysql_parse()
        is not called.  This is not needed in 5.0 since there the LOAD
        DATA ... statement is replicated using mysql_parse(), which
        sets the thd->lex fields correctly.
      */
      thd->lex->sql_command= SQLCOM_LOAD;
      thd->lex->duplicates= handle_dup;
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3649

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3650
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3651 3652 3653 3654 3655
      String field_term(sql_ex.field_term,sql_ex.field_term_len,log_cs);
      String enclosed(sql_ex.enclosed,sql_ex.enclosed_len,log_cs);
      String line_term(sql_ex.line_term,sql_ex.line_term_len,log_cs);
      String line_start(sql_ex.line_start,sql_ex.line_start_len,log_cs);
      String escaped(sql_ex.escaped,sql_ex.escaped_len, log_cs);
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3656 3657 3658 3659 3660
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3661 3662 3663 3664 3665 3666

      ex.opt_enclosed = (sql_ex.opt_flags & OPT_ENCLOSED_FLAG);
      if (sql_ex.empty_flags & FIELD_TERM_EMPTY)
	ex.field_term->length(0);

      ex.skip_lines = skip_lines;
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3667
      List<Item> field_list;
3668 3669
      thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
      set_fields(tables.db, field_list, &thd->lex->select_lex.context);
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3670
      thd->variables.pseudo_thread_id= thread_id;
3671 3672 3673 3674 3675 3676 3677 3678 3679
      if (net)
      {
	// mysql_load will use thd->net to read the file
	thd->net.vio = net->vio;
	/*
	  Make sure the client does not get confused about the packet sequence
	*/
	thd->net.pkt_nr = net->pkt_nr;
      }
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3680
      /*
3681
        It is safe to use tmp_list twice because we are not going to
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3682 3683
        update it inside mysql_load().
      */
3684 3685
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
3686
                     handle_dup, ignore, net != 0))
3687
        thd->is_slave_error= 1;
3688
      if (thd->cuted_fields)
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3689
      {
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3690
	/* log_pos is the position of the LOAD event in the master log */
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3691 3692 3693 3694 3695 3696 3697
        sql_print_warning("Slave: load data infile on table '%s' at "
                          "log position %s in log '%s' produced %ld "
                          "warning(s). Default database: '%s'",
                          (char*) table_name,
                          llstr(log_pos,llbuff), RPL_LOG_NAME, 
                          (ulong) thd->cuted_fields,
                          print_slave_db_safe(thd->db));
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3698
      }
3699 3700 3701
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3702 3703
  }
  else
3704 3705 3706 3707 3708 3709 3710 3711 3712
  {
    /*
      We will just ask the master to send us /dev/null if we do not
      want to load the data.
      TODO: this a bug - needs to be done in I/O thread
    */
    if (net)
      skip_load_data_infile(net);
  }
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3713 3714

error:
3715
  thd->net.vio = 0; 
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3716
  const char *remember_db= thd->db;
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3717
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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3718
  thd->catalog= 0;
3719
  thd->set_db(NULL, 0);                   /* will free the current database */
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3720
  thd->query= 0;
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3721
  thd->query_length= 0;
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3722
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3723
  close_thread_tables(thd);
3724 3725

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
3726
                  thd->is_slave_error= 0; thd->is_fatal_error= 1;);
3727

3728
  if (thd->is_slave_error)
3729
  {
3730
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3731 3732 3733 3734 3735 3736 3737 3738 3739
    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);       
    }
3740
    rli->report(ERROR_LEVEL, sql_errno,"\
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3741
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3742
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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3743
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3744 3745
    return 1;
  }
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3746
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3747

3748
  if (thd->is_fatal_error)
3749
  {
3750 3751 3752 3753 3754 3755 3756 3757 3758
    char buf[256];
    my_snprintf(buf, sizeof(buf),
                "Running LOAD DATA INFILE on table '%-.64s'."
                " Default database: '%-.64s'",
                (char*)table_name,
                print_slave_db_safe(remember_db));

    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), buf);
3759 3760 3761
    return 1;
  }

3762
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
3763
}
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SCRUM  
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3764
#endif
3765 3766


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3767
/**************************************************************************
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3768
  Rotate_log_event methods
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3769
**************************************************************************/
3770

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3771
/*
3772
  Rotate_log_event::pack_info()
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3773
*/
3774

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SCRUM  
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3775
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3776
void Rotate_log_event::pack_info(Protocol *protocol)
3777
{
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3778
  char buf1[256], buf[22];
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3779
  String tmp(buf1, sizeof(buf1), log_cs);
3780
  tmp.length(0);
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3781
  tmp.append(new_log_ident, ident_len);
3782
  tmp.append(STRING_WITH_LEN(";pos="));
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3783 3784
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3785
}
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3786
#endif
3787

3788

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3789
/*
3790
  Rotate_log_event::print()
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3791
*/
3792 3793

#ifdef MYSQL_CLIENT
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3794
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3795
{
3796
  char buf[22];
3797 3798
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3799

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3800
  if (print_event_info->short_form)
3801
    return;
3802 3803
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
3804
  if (new_log_ident)
3805
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
3806
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
3807
}
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3808
#endif /* MYSQL_CLIENT */
3809 3810


3811

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3812
/*
3813
  Rotate_log_event::Rotate_log_event() (2 constructors)
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3814
*/
3815

3816 3817

#ifndef MYSQL_CLIENT
3818
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3819 3820 3821 3822 3823 3824 3825 3826
                                   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];
3827
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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3828 3829
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
3830 3831
#endif
  if (flags & DUP_NAME)
3832
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3833 3834 3835 3836 3837
  DBUG_VOID_RETURN;
}
#endif


3838 3839
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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3840
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3841
{
3842
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3843
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3844 3845
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3846 3847
  uint ident_offset;
  if (event_len < header_size)
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3848
    DBUG_VOID_RETURN;
3849
  buf += header_size;
3850 3851 3852 3853
  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; 
3854
  set_if_smaller(ident_len,FN_REFLEN-1);
3855
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
3856
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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3857
  DBUG_VOID_RETURN;
3858
}
3859 3860


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3861
/*
3862
  Rotate_log_event::write()
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3863
*/
3864

3865
#ifndef MYSQL_CLIENT
3866
bool Rotate_log_event::write(IO_CACHE* file)
3867
{
3868
  char buf[ROTATE_HEADER_LEN];
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3869
  int8store(buf + R_POS_OFFSET, pos);
3870
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
3871 3872
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
3873
}
3874
#endif
3875

3876

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3877
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3878

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3879 3880
/*
  Got a rotate log event from the master.
3881

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3882 3883
  This is mainly used so that we can later figure out the logname and
  position for the master.
3884

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3885 3886 3887
  We can't rotate the slave's BINlog as this will cause infinitive rotations
  in a A -> B -> A setup.
  The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3888

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3889
  @retval
3890
    0	ok
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3891
*/
3892
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
3893
{
3894
  DBUG_ENTER("Rotate_log_event::do_update_pos");
3895 3896 3897 3898
#ifndef DBUG_OFF
  char buf[32];
#endif

3899 3900
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
3901 3902
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
3903 3904

  pthread_mutex_lock(&rli->data_lock);
3905
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3906
  /*
3907 3908 3909 3910
    If we are in a transaction or in a group: the only normal case is
    when the I/O thread was copying a big transaction, then it was
    stopped and restarted: we have this in the relay log:

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3911 3912 3913 3914 3915
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
3916 3917 3918 3919

    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
3920
    relay log, which shall not change the group positions.
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3921
  */
3922
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
3923
      !rli->is_in_group())
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3924
  {
3925 3926 3927 3928
    DBUG_PRINT("info", ("old group_master_log_name: '%s'  "
                        "old group_master_log_pos: %lu",
                        rli->group_master_log_name,
                        (ulong) rli->group_master_log_pos));
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3929 3930
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3931
    rli->group_master_log_pos= pos;
3932 3933 3934
    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();
3935
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3936 3937
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
3938
                        rli->group_master_log_name,
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3939
                        (ulong) rli->group_master_log_pos));
3940
    /*
3941 3942
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3943 3944 3945 3946 3947
      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);
3948
    set_slave_thread_default_charset(thd, rli);
3949
    thd->variables.sql_mode= global_system_variables.sql_mode;
3950 3951
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3952
  }
3953 3954 3955
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
3956

3957
  DBUG_RETURN(0);
3958
}
3959

3960 3961

Log_event::enum_skip_reason
3962
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
3963
{
3964
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
3965 3966

  switch (reason) {
3967
  case Log_event::EVENT_SKIP_NOT:
3968
  case Log_event::EVENT_SKIP_COUNT:
3969
    return Log_event::EVENT_SKIP_NOT;
3970

3971 3972
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
3973 3974
  }
  DBUG_ASSERT(0);
3975
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
3976 3977
}

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#endif
3979 3980


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/**************************************************************************
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	Intvar_log_event methods
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**************************************************************************/
3984

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/*
3986
  Intvar_log_event::pack_info()
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*/
3988

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3990
void Intvar_log_event::pack_info(Protocol *protocol)
3991
{
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  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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  *pos++= '=';
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  pos= longlong10_to_str(val, pos, -10);
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  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3997
}
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#endif
3999

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/*
4002
  Intvar_log_event::Intvar_log_event()
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*/
4004

4005 4006 4007
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4008
{
4009 4010 4011
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
4012 4013
}

4014

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/*
4016
  Intvar_log_event::get_var_type_name()
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*/
4018 4019

const char* Intvar_log_event::get_var_type_name()
4020
{
4021 4022 4023 4024 4025
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
4026 4027
}

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/*
4030
  Intvar_log_event::write()
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*/
4032

4033
#ifndef MYSQL_CLIENT
4034
bool Intvar_log_event::write(IO_CACHE* file)
4035
{
4036 4037
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
4038
  int8store(buf + I_VAL_OFFSET, val);
4039 4040
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4041
}
4042
#endif
4043

4044

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/*
4046
  Intvar_log_event::print()
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*/
4048 4049

#ifdef MYSQL_CLIENT
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void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4051
{
4052 4053 4054
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
4055 4056
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4057

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  if (!print_event_info->short_form)
4059
  {
4060 4061
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
4062
  }
4063

4064
  my_b_printf(&cache, "SET ");
4065 4066 4067 4068 4069 4070 4071
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
4072 4073 4074 4075
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
4076
  }
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  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
4079
}
4080
#endif
4081

4082

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/*
4084
  Intvar_log_event::do_apply_event()
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*/
4086

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#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
4088
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
4089
{
4090 4091 4092 4093
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4094
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4095

4096 4097
  switch (type) {
  case LAST_INSERT_ID_EVENT:
4098 4099
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
4100 4101
    break;
  case INSERT_ID_EVENT:
4102
    thd->force_one_auto_inc_interval(val);
4103 4104
    break;
  }
4105 4106 4107
  return 0;
}

4108
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
4109
{
4110
  rli->inc_event_relay_log_pos();
4111
  return 0;
4112
}
4113 4114 4115


Log_event::enum_skip_reason
4116
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
4117 4118
{
  /*
4119 4120 4121 4122 4123 4124
    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.
4125
  */
4126
  return continue_group(rli);
4127 4128
}

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4129
#endif
4130

4131

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4132
/**************************************************************************
4133
  Rand_log_event methods
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4134
**************************************************************************/
4135

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4137
void Rand_log_event::pack_info(Protocol *protocol)
4138
{
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4139 4140 4141 4142 4143
  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);
4144
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
4145
}
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#endif
4147 4148


4149 4150 4151
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4152
{
4153 4154 4155
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
4156 4157
}

4158

4159
#ifndef MYSQL_CLIENT
4160
bool Rand_log_event::write(IO_CACHE* file)
4161
{
4162
  uchar buf[16];
4163 4164
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
4165 4166
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4167
}
4168
#endif
4169

4170 4171

#ifdef MYSQL_CLIENT
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4172
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4173
{
4174 4175 4176
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  char llbuff[22],llbuff2[22];
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  if (!print_event_info->short_form)
4179
  {
4180 4181
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
4182
  }
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  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
4186
}
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#endif /* MYSQL_CLIENT */
4188

4189

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4190
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4191
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
4192
{
4193 4194 4195 4196
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4197
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4198

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4199 4200
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
4201 4202 4203
  return 0;
}

4204
int Rand_log_event::do_update_pos(Relay_log_info *rli)
4205
{
4206
  rli->inc_event_relay_log_pos();
4207 4208
  return 0;
}
4209

4210 4211

Log_event::enum_skip_reason
4212
Rand_log_event::do_shall_skip(Relay_log_info *rli)
4213 4214
{
  /*
4215 4216 4217 4218 4219 4220
    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.
4221
  */
4222
  return continue_group(rli);
4223 4224
}

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#endif /* !MYSQL_CLIENT */
4226

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4227

4228 4229 4230 4231 4232 4233 4234
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
4235 4236
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
4237
  pos= longlong10_to_str(xid, pos, 10);
4238
  pos= strmov(pos, " */");
4239 4240 4241 4242
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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4243 4244 4245
/**
  @note
  It's ok not to use int8store here,
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4246
  as long as xid_t::set(ulonglong) and
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4247 4248
  xid_t::get_my_xid doesn't do it either.
  We don't care about actual values of xids as long as
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4249 4250
  identical numbers compare identically
*/
4251 4252 4253 4254

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
4255 4256 4257
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
4258
  memcpy((char*) &xid, buf, sizeof(xid));
4259 4260 4261
}


4262
#ifndef MYSQL_CLIENT
4263 4264 4265
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
4266
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
4267
}
4268
#endif
4269 4270 4271


#ifdef MYSQL_CLIENT
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void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4273
{
4274 4275 4276
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
4278
  {
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    char buf[64];
    longlong10_to_str(xid, buf, 10);

4282 4283
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
4284
  }
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  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
4286 4287 4288 4289 4290
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4291
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
4292
{
4293
  /* For a slave Xid_log_event is COMMIT */
4294 4295
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
4296
  return end_trans(thd, COMMIT);
4297
}
4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308

Log_event::enum_skip_reason
Xid_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Xid_log_event::do_shall_skip");
  if (rli->slave_skip_counter > 0) {
    thd->options&= ~OPTION_BEGIN;
    DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
  }
  DBUG_RETURN(Log_event::do_shall_skip(rli));
}
4309 4310 4311
#endif /* !MYSQL_CLIENT */


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4312
/**************************************************************************
4313
  User_var_log_event methods
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4314
**************************************************************************/
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4316
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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4317 4318 4319
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
4320
  uint val_offset= 4 + name_len;
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4321 4322 4323 4324
  uint event_len= val_offset;

  if (is_null)
  {
4325 4326
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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4327 4328 4329 4330 4331 4332 4333 4334 4335
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
4336 4337 4338
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
4339 4340
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
4343 4344
      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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4345 4346
      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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    case DECIMAL_RESULT:
    {
4349 4350 4351
      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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4352 4353
      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
4354 4355
      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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4356 4357 4358 4359
      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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    case STRING_RESULT:
4361
      /* 15 is for 'COLLATE' and other chars */
4362 4363
      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
4364
      CHARSET_INFO *cs;
4365 4366
      if (!buf)
        return;
4367 4368 4369 4370 4371 4372 4373
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
4374 4375 4376
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
4377 4378
        event_len= p-buf;
      }
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      break;
4380
    case ROW_RESULT:
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    default:
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4382 4383 4384 4385 4386
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
4387
  buf[1]= '`';
4388
  memcpy(buf+2, name, name_len);
4389 4390
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
4391
  protocol->store(buf, event_len, &my_charset_bin);
4392
  my_free(buf, MYF(0));
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}
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#endif /* !MYSQL_CLIENT */
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4397 4398 4399 4400
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
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{
4402
  buf+= description_event->common_header_len;
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4403 4404
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
4405 4406
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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  if (is_null)
  {
    type= STRING_RESULT;
4410
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
4416 4417 4418
    type= (Item_result) buf[UV_VAL_IS_NULL];
    charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
    val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
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4419
		       UV_CHARSET_NUMBER_SIZE);
4420 4421
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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  }
}


4426
#ifndef MYSQL_CLIENT
4427
bool User_var_log_event::write(IO_CACHE* file)
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{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
4432
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
4433
  uint buf1_length;
4434
  ulong event_length;
4435

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  int4store(buf, name_len);
4437 4438 4439 4440
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
4441
    val_len= 0;                                 // Length of 'pos'
4442 4443
  }    
  else
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4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454
  {
    buf1[1]= type;
    int4store(buf1 + 2, charset_number);

    switch (type) {
    case REAL_RESULT:
      float8store(buf2, *(double*) val);
      break;
    case INT_RESULT:
      int8store(buf2, *(longlong*) val);
      break;
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    case DECIMAL_RESULT:
    {
      my_decimal *dec= (my_decimal *)val;
      dec->fix_buffer_pointer();
      buf2[0]= (char)(dec->intg + dec->frac);
      buf2[1]= (char)dec->frac;
4461
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
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      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
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    case STRING_RESULT:
4466
      pos= (uchar*) val;
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      break;
4468
    case ROW_RESULT:
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    default:
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4470 4471 4472
      DBUG_ASSERT(1);
      return 0;
    }
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    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
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  }
4476 4477 4478 4479 4480

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

  return (write_header(file, event_length) ||
4481 4482 4483 4484
          my_b_safe_write(file, (uchar*) buf, sizeof(buf))   ||
	  my_b_safe_write(file, (uchar*) name, name_len)     ||
	  my_b_safe_write(file, (uchar*) buf1, buf1_length) ||
	  my_b_safe_write(file, pos, val_len));
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}
4486
#endif
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4488

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/*
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  User_var_log_event::print()
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*/
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#ifdef MYSQL_CLIENT
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void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
4496 4497 4498
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
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  {
4501 4502
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

4505
  my_b_printf(&cache, "SET @`");
4506
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
4507
  my_b_printf(&cache, "`");
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  if (is_null)
  {
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    my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
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  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
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      my_b_printf(&cache, ":=%.14g%s\n", real_val, print_event_info->delimiter);
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      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
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      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
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      break;
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    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
4532 4533
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

4537
      bin2decimal((uchar*) val+2, &dec, precision, scale);
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      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
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      my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
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      break;
    }
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4543
    case STRING_RESULT:
4544
    {
4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558
      /*
        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.
      */
4559 4560 4561 4562
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
4563
        break; // no error, as we are 'void'
4564
      str_to_hex(hex_str, val, val_len);
4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575
      /*
        For proper behaviour when mysqlbinlog|mysql, we need to explicitely
        specify the variable's collation. It will however cause problems when
        people want to mysqlbinlog|mysql into another server not supporting the
        character set. But there's not much to do about this and it's unlikely.
      */
      if (!(cs= get_charset(charset_number, MYF(0))))
        /*
          Generate an unusable command (=> syntax error) is probably the best
          thing we can do here.
        */
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        my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter);
4577
      else
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        my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n",
                    cs->csname, hex_str, cs->name,
                    print_event_info->delimiter);
4581
      my_afree(hex_str);
4582
    }
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      break;
4584
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
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      return;
    }
  }
}
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#endif
4592

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4593

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/*
4595
  User_var_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4599
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
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{
  Item *it= 0;
4602 4603 4604
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
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  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
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  double real_val;
  longlong int_val;
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  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4615
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4616

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
4626
      it= new Item_float(real_val, 0);
4627
      val= (char*) &real_val;		// Pointer to value in native format
4628
      val_len= 8;
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      break;
    case INT_RESULT:
4631 4632 4633
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
4634
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
4638
      Item_decimal *dec= new Item_decimal((uchar*) val+2, val[0], val[1]);
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      it= dec;
      val= (char *)dec->val_decimal(NULL);
      val_len= sizeof(my_decimal);
      break;
    }
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    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
4647
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
4654 4655 4656 4657
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
4658
  e.fix_fields(thd, 0);
4659 4660 4661 4662 4663
  /*
    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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  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
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  free_root(thd->mem_root,0);
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4667 4668 4669
  return 0;
}

4670
int User_var_log_event::do_update_pos(Relay_log_info *rli)
4671
{
4672
  rli->inc_event_relay_log_pos();
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  return 0;
}
4675

4676
Log_event::enum_skip_reason
4677
User_var_log_event::do_shall_skip(Relay_log_info *rli)
4678 4679 4680 4681 4682 4683 4684 4685 4686
{
  /*
    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.
  */
4687
  return continue_group(rli);
4688
}
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#endif /* !MYSQL_CLIENT */
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/**************************************************************************
4693
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
4697
#ifdef MYSQL_CLIENT
4698
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
4699
{
4700 4701
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
4703
    return;
4704 4705
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
4706 4707
}
#endif  
4708

4709
#ifndef MYSQL_CLIENT
4710
void Slave_log_event::pack_info(Protocol *protocol)
4711
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
4713 4714 4715 4716 4717 4718 4719
  pos= strmov(buf, "host=");
  pos= strnmov(pos, master_host, HOSTNAME_LENGTH);
  pos= strmov(pos, ",port=");
  pos= int10_to_str((long) master_port, pos, 10);
  pos= strmov(pos, ",log=");
  pos= strmov(pos, master_log);
  pos= strmov(pos, ",pos=");
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  pos= longlong10_to_str(master_pos, pos, 10);
4721
  protocol->store(buf, pos-buf, &my_charset_bin);
4722
}
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#endif /* !MYSQL_CLIENT */
4724 4725 4726


#ifndef MYSQL_CLIENT
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/**
  @todo
  re-write this better without holding both locks at the same time
*/
4731
Slave_log_event::Slave_log_event(THD* thd_arg,
4732
				 Relay_log_info* rli)
4733
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
4734 4735 4736 4737
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
4738

4739
  Master_info* mi = rli->mi;
4740 4741 4742 4743
  // 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);
4744
  master_log_len = strlen(rli->group_master_log_name);
4745 4746 4747
  // 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))))
4748
  {
4749 4750 4751
    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;
4752
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
4753
    master_port = mi->port;
4754
    master_pos = rli->group_master_log_pos;
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4755
    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
4756
			(ulong) master_pos));
4757
  }
4758 4759 4760 4761 4762 4763
  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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#endif /* !MYSQL_CLIENT */
4765 4766 4767 4768 4769 4770 4771 4772 4773


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


#ifdef MYSQL_CLIENT
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void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4775
{
4776 4777
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4778
  char llbuff[22];
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  if (print_event_info->short_form)
4780
    return;
4781 4782
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
4784 4785
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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#endif /* MYSQL_CLIENT */
4787 4788 4789 4790 4791 4792 4793 4794


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


4795
#ifndef MYSQL_CLIENT
4796
bool Slave_log_event::write(IO_CACHE* file)
4797
{
4798
  ulong event_length= get_data_size();
4799 4800 4801
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4802 4803

  return (write_header(file, event_length) ||
4804
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
4805
}
4806
#endif
4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817


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)
4818
  {
4819 4820
    master_host = 0;
    return;
4821
  }
4822 4823
  master_log_len = strlen(master_log);
}
4824

4825

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4826
/** This code is not used, so has not been updated to be format-tolerant. */
4827 4828
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
4829
{
4830
  if (event_len < LOG_EVENT_HEADER_LEN)
4831
    return;
4832
  event_len -= LOG_EVENT_HEADER_LEN;
4833 4834 4835 4836 4837
  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);
4838 4839
}

4840

4841
#ifndef MYSQL_CLIENT
4842
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
4843 4844 4845
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
4846
  return 0;
4847
}
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4848
#endif /* !MYSQL_CLIENT */
4849 4850


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4851
/**************************************************************************
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4852
	Stop_log_event methods
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**************************************************************************/
4854

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/*
4856
  Stop_log_event::print()
4857
*/
4858 4859

#ifdef MYSQL_CLIENT
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4860
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4861
{
4862 4863 4864
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (print_event_info->short_form)
4866 4867
    return;

4868 4869
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
4870
}
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4871
#endif /* MYSQL_CLIENT */
4872

4873

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4874
#ifndef MYSQL_CLIENT
4875
/*
4876 4877 4878 4879 4880 4881 4882
  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
4883
  Start_log_event_v3::do_apply_event(), not here. Because if we come
4884
  here, the master was sane.
4885
*/
4886
int Stop_log_event::do_update_pos(Relay_log_info *rli)
4887
{
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4888 4889
  /*
    We do not want to update master_log pos because we get a rotate event
4890
    before stop, so by now group_master_log_name is set to the next log.
4891
    If we updated it, we will have incorrect master coordinates and this
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4892
    could give false triggers in MASTER_POS_WAIT() that we have reached
4893
    the target position when in fact we have not.
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4894
  */
4895 4896 4897 4898 4899 4900 4901
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4902 4903
  return 0;
}
4904

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4905
#endif /* !MYSQL_CLIENT */
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4906
#endif /* HAVE_REPLICATION */
4907

4908

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4909
/**************************************************************************
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4910
	Create_file_log_event methods
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4911
**************************************************************************/
4912 4913

/*
4914
  Create_file_log_event ctor
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4915
*/
4916 4917

#ifndef MYSQL_CLIENT
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Create_file_log_event::
Create_file_log_event(THD* thd_arg, sql_exchange* ex,
		      const char* db_arg, const char* table_name_arg,
		      List<Item>& fields_arg, enum enum_duplicates handle_dup,
4922
                      bool ignore,
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		      char* block_arg, uint block_len_arg, bool using_trans)
4924
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4925
		  using_trans),
4926
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4927
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4928
{
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4929
  DBUG_ENTER("Create_file_log_event");
4930
  sql_ex.force_new_format();
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4931
  DBUG_VOID_RETURN;
4932
}
4933

4934

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4935
/*
4936
  Create_file_log_event::write_data_body()
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4937
*/
4938

4939
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4940
{
4941 4942
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4943
    return res;
4944 4945
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
4946 4947
}

4948

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4949
/*
4950
  Create_file_log_event::write_data_header()
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4951
*/
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4952

4953
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4954
{
4955
  bool res;
4956
  uchar buf[CREATE_FILE_HEADER_LEN];
4957 4958
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4959
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4960
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4961 4962 4963
}


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4964
/*
4965
  Create_file_log_event::write_base()
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4966
*/
4967

4968
bool Create_file_log_event::write_base(IO_CACHE* file)
4969
{
4970 4971 4972 4973
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4974 4975 4976
  return res;
}

4977
#endif /* !MYSQL_CLIENT */
4978

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4979
/*
4980
  Create_file_log_event ctor
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4981
*/
4982

4983 4984 4985
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)
4986
{
4987 4988 4989 4990 4991
  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];
4992
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
4993 4994 4995 4996 4997 4998 4999
      copy_log_event(event_buf,len,
                     ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                      load_header_len + header_len :
                      (fake_base ? (header_len+load_header_len) :
                       (header_len+load_header_len) +
                       create_file_header_len)),
                     description_event))
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5000
    DBUG_VOID_RETURN;
5001
  if (description_event->binlog_version!=1)
5002
  {
5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019
    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);
5020 5021 5022 5023 5024 5025 5026 5027 5028
    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;
5029
  }
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5030
  DBUG_VOID_RETURN;
5031 5032
}

5033

unknown's avatar
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5034
/*
5035
  Create_file_log_event::print()
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5036
*/
5037 5038

#ifdef MYSQL_CLIENT
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5039
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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5040
				  bool enable_local)
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5041
{
5042 5043
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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5044
  if (print_event_info->short_form)
5045 5046
  {
    if (enable_local && check_fname_outside_temp_buf())
unknown's avatar
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5047
      Load_log_event::print(file, print_event_info);
5048
    return;
5049 5050 5051 5052
  }

  if (enable_local)
  {
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5053
    Load_log_event::print(file, print_event_info,
5054
			  !check_fname_outside_temp_buf());
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5055 5056 5057 5058
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
5059
    my_b_printf(&cache, "#"); 
5060 5061
  }

5062
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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5063
}
5064

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5065

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5066
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5067
{
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5068
  print(file, print_event_info, 0);
5069
}
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5070
#endif /* MYSQL_CLIENT */
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5071

5072

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5073
/*
5074
  Create_file_log_event::pack_info()
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5075
*/
5076

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5077
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5078
void Create_file_log_event::pack_info(Protocol *protocol)
5079
{
5080 5081 5082
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
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5083
  pos= strmov(pos + db_len, ";table=");
5084
  memcpy(pos, table_name, table_name_len);
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5085
  pos= strmov(pos + table_name_len, ";file_id=");
5086 5087 5088
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
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5089
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
5090
}
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5091
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5092 5093


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5094
/*
5095
  Create_file_log_event::do_apply_event()
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5096
*/
5097

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5098
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5099
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
5100
{
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5101 5102
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
5103 5104 5105
  int fd = -1;
  IO_CACHE file;
  int error = 1;
unknown's avatar
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5106

5107
  bzero((char*)&file, sizeof(file));
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5108 5109
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
5110
  thd->proc_info= proc_info;
5111 5112 5113 5114
  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 ||
5115 5116 5117
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5118 5119 5120
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
5121 5122 5123 5124
    goto err;
  }
  
  // a trick to avoid allocating another buffer
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5125 5126
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
5127 5128
  if (write_base(&file))
  {
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5129
    strmov(ext, ".info"); // to have it right in the error message
5130 5131 5132
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
5133 5134 5135 5136 5137 5138
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
5139 5140 5141 5142
  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)
5143
  {
5144 5145 5146
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
5147 5148
    goto err;
  }
5149
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5150
  {
5151 5152 5153
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
5154 5155
    goto err;
  }
5156 5157
  error=0;					// Everything is ok

5158 5159 5160 5161 5162
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
unknown's avatar
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5163
  thd->proc_info= 0;
5164
  return error == 0;
5165
}
unknown's avatar
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5166
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5167

5168

unknown's avatar
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5169
/**************************************************************************
unknown's avatar
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5170
	Append_block_log_event methods
unknown's avatar
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5171
**************************************************************************/
5172

unknown's avatar
unknown committed
5173
/*
5174
  Append_block_log_event ctor
unknown's avatar
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5175
*/
5176 5177

#ifndef MYSQL_CLIENT  
5178 5179 5180
Append_block_log_event::Append_block_log_event(THD *thd_arg,
                                               const char *db_arg,
					       char *block_arg,
unknown's avatar
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5181 5182 5183
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
unknown's avatar
unknown committed
5184
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
5185 5186
{
}
unknown's avatar
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5187
#endif
5188 5189


unknown's avatar
unknown committed
5190
/*
5191
  Append_block_log_event ctor
unknown's avatar
unknown committed
5192
*/
5193

5194 5195 5196
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)
5197
{
5198 5199 5200 5201 5202 5203
  DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
  uint8 common_header_len= description_event->common_header_len; 
  uint8 append_block_header_len=
    description_event->post_header_len[APPEND_BLOCK_EVENT-1];
  uint total_header_len= common_header_len+append_block_header_len;
  if (len < total_header_len)
unknown's avatar
unknown committed
5204
    DBUG_VOID_RETURN;
5205 5206 5207
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
  block= (char*)buf + total_header_len;
  block_len= len - total_header_len;
unknown's avatar
unknown committed
5208
  DBUG_VOID_RETURN;
5209 5210 5211
}


unknown's avatar
unknown committed
5212
/*
5213
  Append_block_log_event::write()
unknown's avatar
unknown committed
5214
*/
5215

5216
#ifndef MYSQL_CLIENT
5217
bool Append_block_log_event::write(IO_CACHE* file)
5218
{
5219
  uchar buf[APPEND_BLOCK_HEADER_LEN];
5220
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
5221 5222
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
5223
	  my_b_safe_write(file, (uchar*) block, block_len));
5224
}
5225
#endif
5226 5227


unknown's avatar
unknown committed
5228
/*
5229
  Append_block_log_event::print()
unknown's avatar
unknown committed
5230
*/
5231 5232

#ifdef MYSQL_CLIENT  
unknown's avatar
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5233
void Append_block_log_event::print(FILE* file,
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5234
				   PRINT_EVENT_INFO* print_event_info)
5235
{
5236 5237
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5238
  if (print_event_info->short_form)
5239
    return;
5240 5241 5242
  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);
5243
}
unknown's avatar
unknown committed
5244
#endif /* MYSQL_CLIENT */
5245 5246


unknown's avatar
unknown committed
5247
/*
5248
  Append_block_log_event::pack_info()
unknown's avatar
unknown committed
5249
*/
5250

unknown's avatar
SCRUM  
unknown committed
5251
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5252
void Append_block_log_event::pack_info(Protocol *protocol)
5253 5254 5255 5256 5257 5258
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
unknown's avatar
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5259
  protocol->store(buf, length, &my_charset_bin);
5260 5261 5262
}


unknown's avatar
unknown committed
5263
/*
5264
  Append_block_log_event::get_create_or_append()
unknown's avatar
unknown committed
5265 5266
*/

5267
int Append_block_log_event::get_create_or_append() const
unknown's avatar
unknown committed
5268
{
5269
  return 0; /* append to the file, fail if not exists */
unknown's avatar
unknown committed
5270 5271
}

unknown's avatar
unknown committed
5272
/*
5273
  Append_block_log_event::do_apply_event()
unknown's avatar
unknown committed
5274
*/
5275

5276
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
5277
{
5278
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
5279
  int fd;
5280
  int error = 1;
5281
  DBUG_ENTER("Append_block_log_event::do_apply_event");
5282

unknown's avatar
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5283 5284
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
5285
  thd->proc_info= proc_info;
5286 5287 5288 5289 5290 5291 5292
  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)
    {
5293 5294 5295
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
5296 5297 5298
      goto err;
    }
  }
5299 5300
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
5301
  {
5302 5303 5304
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
5305 5306
    goto err;
  }
5307
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5308
  {
5309 5310 5311
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
5312 5313 5314
    goto err;
  }
  error=0;
5315

5316 5317 5318
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
5319
  thd->proc_info= 0;
5320
  DBUG_RETURN(error);
5321
}
unknown's avatar
SCRUM  
unknown committed
5322
#endif
5323 5324


unknown's avatar
unknown committed
5325
/**************************************************************************
unknown's avatar
unknown committed
5326
	Delete_file_log_event methods
unknown's avatar
unknown committed
5327
**************************************************************************/
5328

unknown's avatar
unknown committed
5329
/*
5330
  Delete_file_log_event ctor
unknown's avatar
unknown committed
5331
*/
5332 5333

#ifndef MYSQL_CLIENT
unknown's avatar
unknown committed
5334 5335 5336
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)
5337 5338
{
}
unknown's avatar
unknown committed
5339
#endif
5340

unknown's avatar
unknown committed
5341
/*
5342
  Delete_file_log_event ctor
unknown's avatar
unknown committed
5343
*/
5344

5345 5346 5347
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)
5348
{
5349 5350 5351
  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))
5352
    return;
5353
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
5354 5355 5356
}


unknown's avatar
unknown committed
5357
/*
5358
  Delete_file_log_event::write()
unknown's avatar
unknown committed
5359
*/
5360

5361
#ifndef MYSQL_CLIENT
5362
bool Delete_file_log_event::write(IO_CACHE* file)
5363
{
5364
 uchar buf[DELETE_FILE_HEADER_LEN];
5365
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
5366 5367
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
5368
}
5369
#endif
5370 5371


unknown's avatar
unknown committed
5372
/*
5373
  Delete_file_log_event::print()
unknown's avatar
unknown committed
5374
*/
5375 5376

#ifdef MYSQL_CLIENT  
unknown's avatar
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5377
void Delete_file_log_event::print(FILE* file,
unknown's avatar
unknown committed
5378
				  PRINT_EVENT_INFO* print_event_info)
5379
{
5380 5381
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5382
  if (print_event_info->short_form)
5383
    return;
5384 5385
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
5386
}
unknown's avatar
unknown committed
5387
#endif /* MYSQL_CLIENT */
5388

unknown's avatar
unknown committed
5389
/*
5390
  Delete_file_log_event::pack_info()
unknown's avatar
unknown committed
5391
*/
5392

unknown's avatar
SCRUM  
unknown committed
5393
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5394
void Delete_file_log_event::pack_info(Protocol *protocol)
5395 5396 5397 5398
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5399
  protocol->store(buf, (int32) length, &my_charset_bin);
5400
}
unknown's avatar
SCRUM  
unknown committed
5401
#endif
5402

unknown's avatar
unknown committed
5403
/*
5404
  Delete_file_log_event::do_apply_event()
unknown's avatar
unknown committed
5405
*/
5406

unknown's avatar
SCRUM  
unknown committed
5407
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5408
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
5409 5410
{
  char fname[FN_REFLEN+10];
unknown's avatar
unknown committed
5411
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
5412
  (void) my_delete(fname, MYF(MY_WME));
unknown's avatar
unknown committed
5413
  strmov(ext, ".info");
5414
  (void) my_delete(fname, MYF(MY_WME));
5415
  return 0;
5416
}
unknown's avatar
unknown committed
5417
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5418 5419


unknown's avatar
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5420
/**************************************************************************
unknown's avatar
unknown committed
5421
	Execute_load_log_event methods
unknown's avatar
unknown committed
5422
**************************************************************************/
5423

unknown's avatar
unknown committed
5424
/*
5425
  Execute_load_log_event ctor
unknown's avatar
unknown committed
5426
*/
5427 5428

#ifndef MYSQL_CLIENT  
5429 5430
Execute_load_log_event::Execute_load_log_event(THD *thd_arg,
                                               const char* db_arg,
unknown's avatar
unknown committed
5431 5432
					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
5433 5434
{
}
unknown's avatar
unknown committed
5435
#endif
5436 5437
  

unknown's avatar
unknown committed
5438
/*
5439
  Execute_load_log_event ctor
unknown's avatar
unknown committed
5440
*/
5441

5442 5443 5444
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)
5445
{
5446 5447 5448
  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))
5449
    return;
5450
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
5451 5452 5453
}


unknown's avatar
unknown committed
5454
/*
5455
  Execute_load_log_event::write()
unknown's avatar
unknown committed
5456
*/
5457

5458
#ifndef MYSQL_CLIENT
5459
bool Execute_load_log_event::write(IO_CACHE* file)
5460
{
5461
  uchar buf[EXEC_LOAD_HEADER_LEN];
5462
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
5463 5464
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
5465
}
5466
#endif
5467 5468


unknown's avatar
unknown committed
5469
/*
5470
  Execute_load_log_event::print()
unknown's avatar
unknown committed
5471
*/
5472 5473

#ifdef MYSQL_CLIENT  
unknown's avatar
unknown committed
5474
void Execute_load_log_event::print(FILE* file,
unknown's avatar
unknown committed
5475
				   PRINT_EVENT_INFO* print_event_info)
5476
{
5477 5478
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5479
  if (print_event_info->short_form)
5480
    return;
5481 5482 5483
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
5484
}
unknown's avatar
unknown committed
5485
#endif
5486

unknown's avatar
unknown committed
5487
/*
5488
  Execute_load_log_event::pack_info()
unknown's avatar
unknown committed
5489
*/
5490

unknown's avatar
SCRUM  
unknown committed
5491
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5492
void Execute_load_log_event::pack_info(Protocol *protocol)
5493 5494 5495 5496
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5497
  protocol->store(buf, (int32) length, &my_charset_bin);
5498 5499 5500
}


unknown's avatar
unknown committed
5501
/*
5502
  Execute_load_log_event::do_apply_event()
unknown's avatar
unknown committed
5503
*/
unknown's avatar
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int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
5506 5507
{
  char fname[FN_REFLEN+10];
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  char *ext;
5509
  int fd;
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  int error= 1;
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  IO_CACHE file;
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  Load_log_event *lev= 0;
5513

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  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 ||
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      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
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    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
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    goto err;
  }
5525
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
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                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
5528
      lev->get_type_code() != NEW_LOAD_EVENT)
5529
  {
5530
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
5531
                    "file '%s' appears corrupted", fname);
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    goto err;
  }
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5535
  lev->thd = thd;
5536
  /*
5537
    lev->do_apply_event should use rli only for errors i.e. should
5538 5539
    not advance rli's position.

5540
    lev->do_apply_event is the place where the table is loaded (it
5541
    calls mysql_load()).
5542
  */
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5544
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
5545
  if (lev->do_apply_event(0,rli,1)) 
5546
  {
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    /*
      We want to indicate the name of the file that could not be loaded
      (SQL_LOADxxx).
      But as we are here we are sure the error is in rli->last_slave_error and
      rli->last_slave_errno (example of error: duplicate entry for key), so we
      don't want to overwrite it with the filename.
      What we want instead is add the filename to the current error message.
    */
5555
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
5556 5557
    if (tmp)
    {
5558
      rli->report(ERROR_LEVEL, rli->last_error().number,
5559
                  "%s. Failed executing load from '%s'", tmp, fname);
5560 5561
      my_free(tmp,MYF(0));
    }
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    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;
  }
5574
  (void) my_delete(fname, MYF(MY_WME));
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  memcpy(ext, ".data", 6);
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  (void) my_delete(fname, MYF(MY_WME));
5577
  error = 0;
5578

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err:
  delete lev;
  if (fd >= 0)
5582
  {
5583
    my_close(fd, MYF(0));
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    end_io_cache(&file);
  }
5586
  return error;
5587
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
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/**************************************************************************
	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)
5617
int Begin_load_query_log_event::get_create_or_append() const
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{
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  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


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#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
Log_event::enum_skip_reason
Begin_load_query_log_event::do_shall_skip(Relay_log_info *rli)
{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
  return continue_group(rli);
}
#endif


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


#ifndef MYSQL_CLIENT
Execute_load_query_log_event::
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Execute_load_query_log_event(THD *thd_arg, const char* query_arg,
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                             ulong query_length_arg, uint fn_pos_start_arg,
                             uint fn_pos_end_arg,
                             enum_load_dup_handling dup_handling_arg,
                             bool using_trans, bool suppress_use,
                             THD::killed_state killed_err_arg):
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  Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
5651
                  suppress_use, killed_err_arg),
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  file_id(thd_arg->file_id), fn_pos_start(fn_pos_start_arg),
  fn_pos_end(fn_pos_end_arg), dup_handling(dup_handling_arg)
{
}
#endif /* !MYSQL_CLIENT */


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

  buf+= desc_event->common_header_len;

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

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

  file_id= uint4korr(buf + ELQ_FILE_ID_OFFSET);
}


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


5688
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
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  uchar buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
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  int4store(buf, file_id);
  int4store(buf + 4, fn_pos_start);
  int4store(buf + 4 + 4, fn_pos_end);
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  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
5699
#endif
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#ifdef MYSQL_CLIENT
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info)
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{
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  print(file, print_event_info, 0);
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}

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

  print_query_header(&cache, print_event_info);
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  if (local_fname)
  {
5722
    my_b_write(&cache, (uchar*) query, fn_pos_start);
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    my_b_printf(&cache, " LOCAL INFILE \'");
    my_b_printf(&cache, local_fname);
    my_b_printf(&cache, "\'");
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    if (dup_handling == LOAD_DUP_REPLACE)
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      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
5729
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
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    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  }
  else
  {
5734
    my_b_write(&cache, (uchar*) query, q_len);
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    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  }

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  if (!print_event_info->short_form)
5739
    my_b_printf(&cache, "# file_id: %d \n", file_id);
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}
#endif


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_query_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
5748
  if (!(buf= (char*) my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME))))
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    return;
  pos= buf;
  if (db && db_len)
  {
    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
    pos= strmov(pos+db_len, "`; ");
  }
  if (query && q_len)
  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
  pos= strmov(pos, " ;file_id=");
  pos= int10_to_str((long) file_id, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}


int
5770
Execute_load_query_log_event::do_apply_event(Relay_log_info const *rli)
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{
  char *p;
  char *buf;
  char *fname;
  char *fname_end;
  int error;

5778 5779
  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
5780

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  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
5782

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  /* Replace filename and LOCAL keyword in query before executing it */
5784
  if (buf == NULL)
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  {
5786 5787
    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), "Not enough memory");
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    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
5794
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
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  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
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  *(p++)='\'';
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  switch (dup_handling) {
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  case LOAD_DUP_IGNORE:
5800
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
5803
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
5809
  p= strmake(p, STRING_WITH_LEN(" INTO"));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

5812
  error= Query_log_event::do_apply_event(rli, buf, p-buf);
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  /* Forging file name for deletion in same buffer */
  *fname_end= 0;

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


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5830
/**************************************************************************
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	sql_ex_info methods
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**************************************************************************/
5833

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/*
5835
  sql_ex_info::write_data()
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*/
5837

5838
bool sql_ex_info::write_data(IO_CACHE* file)
5839 5840 5841
{
  if (new_format())
  {
5842 5843 5844 5845 5846
    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) ||
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	    my_b_safe_write(file,(uchar*) &opt_flags,1));
5848 5849 5850
  }
  else
  {
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    /**
      @todo This is sensitive to field padding. We should write a
      char[7], not an old_sql_ex. /sven
    */
5855 5856 5857 5858 5859 5860 5861 5862
    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;
5863
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
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  }
}


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/*
5869
  sql_ex_info::init()
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5870
*/
5871

5872
char *sql_ex_info::init(char *buf, char *buf_end, bool use_new_format)
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{
  cached_new_format = use_new_format;
  if (use_new_format)
  {
    empty_flags=0;
    /*
      The code below assumes that buf will not disappear from
      under our feet during the lifetime of the event. This assumption
      holds true in the slave thread if the log is in new format, but is not
      the case when we have old format because we will be reusing net buffer
      to read the actual file before we write out the Create_file event.
    */
5885 5886 5887 5888 5889 5890
    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))
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      return 0;
    opt_flags = *buf++;
  }
  else
  {
    field_term_len= enclosed_len= line_term_len= line_start_len= escaped_len=1;
    field_term = buf++;			// Use first byte in string
    enclosed=	 buf++;
    line_term=   buf++;
    line_start=  buf++;
    escaped=     buf++;
    opt_flags =  *buf++;
    empty_flags= *buf++;
    if (empty_flags & FIELD_TERM_EMPTY)
      field_term_len=0;
    if (empty_flags & ENCLOSED_EMPTY)
      enclosed_len=0;
    if (empty_flags & LINE_TERM_EMPTY)
      line_term_len=0;
    if (empty_flags & LINE_START_EMPTY)
      line_start_len=0;
    if (empty_flags & ESCAPED_EMPTY)
      escaped_len=0;
  }
  return buf;
}
5917 5918 5919 5920 5921 5922 5923 5924 5925 5926


/**************************************************************************
	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),
5927
    m_row_count(0),
5928 5929
    m_table(tbl_arg),
    m_table_id(tid),
5930
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
5931 5932
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0) 
#ifdef HAVE_REPLICATION
5933
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
5934
#endif
5935
{
5936 5937
  /*
    We allow a special form of dummy event when the table, and cols
5938
    are null and the table id is ~0UL.  This is a temporary
5939
    solution, to be able to terminate a started statement in the
5940
    binary log: the extraneous events will be removed in the future.
5941
   */
5942 5943
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5944 5945 5946 5947 5948

  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);
5949
  /* if bitmap_init fails, caught in is_valid() */
5950 5951
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
5952
                          m_width,
5953
                          false)))
5954 5955 5956
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
5957
    {
5958
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
5959 5960
      create_last_word_mask(&m_cols);
    }
5961
  }
5962
  else
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  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
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}
#endif

Rows_log_event::Rows_log_event(const char *buf, uint event_len,
                               Log_event_type event_type,
                               const Format_description_log_event
                               *description_event)
  : Log_event(buf, description_event),
5975
    m_row_count(0),
5976
#ifndef MYSQL_CLIENT
5977
    m_table(NULL),
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#endif
    m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
5981
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
5982
#endif
5983 5984 5985 5986 5987
{
  DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
  uint8 const common_header_len= description_event->common_header_len;
  uint8 const post_header_len= description_event->post_header_len[event_type-1];

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

  const char *post_start= buf + common_header_len;
  post_start+= RW_MAPID_OFFSET;
  if (post_header_len == 6)
  {
    /* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
    m_table_id= uint4korr(post_start);
    post_start+= 4;
  }
  else
  {
6003
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

6009 6010 6011
  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
6012
  uchar *ptr_after_width= (uchar*) ptr_width;
6013
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
6014
  m_width = net_field_length(&ptr_after_width);
6015 6016 6017 6018
  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,
6019
                          m_width,
6020 6021 6022 6023
                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
6024
    create_last_word_mask(&m_cols);
6025
    ptr_after_width+= (m_width + 7) / 8;
6026
    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
6027 6028 6029 6030 6031 6032 6033
  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
6034

6035 6036 6037 6038 6039 6040
  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));

6041
    /* if bitmap_init fails, caught in is_valid() */
6042 6043
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
6044
                            m_width,
6045 6046 6047 6048
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
6049
      create_last_word_mask(&m_cols_ai);
6050
      ptr_after_width+= (m_width + 7) / 8;
6051 6052
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
6053 6054 6055 6056 6057 6058 6059 6060 6061
    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

6062
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
6063

6064
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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6065
  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
6066
                     m_table_id, m_flags, m_width, (ulong) data_size));
6067

6068
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
6069 6070
  if (likely((bool)m_rows_buf))
  {
6071
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6072
    m_curr_row= m_rows_buf;
6073
#endif
6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088
    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().
6089
  my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
6090 6091
}

6092 6093 6094 6095
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

6096 6097
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114

  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; 
}


6115
#ifndef MYSQL_CLIENT
6116
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
6117 6118 6119 6120 6121 6122
{
  /*
    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
  */
6123
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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6124 6125
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
6126 6127 6128 6129 6130
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
6131
  DBUG_DUMP("row_data", row_data, min(length, 32));
6132
#endif
6133 6134

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
6135
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
6136 6137 6138
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
6139
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
6140
  {
6141
    size_t const block_size= 1024;
6142
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
6143
    my_ptrdiff_t const new_alloc= 
6144
        block_size * ((cur_size + length + block_size - 1) / block_size);
6145

6146
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
6147
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164
    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;
  }

6165
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
6166 6167
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
6168
  m_row_count++;
6169 6170 6171 6172 6173
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6174
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
6175
{
6176
  DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
6177
  int error= 0;
6178 6179

  /*
6180 6181 6182
    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
6183
    success.
6184
   */
6185
  if (m_table_id == ~0UL)
6186 6187 6188 6189 6190 6191 6192
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

6193
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6194
    close_thread_tables(thd);
6195 6196 6197
    thd->clear_error();
    DBUG_RETURN(0);
  }
6198 6199 6200

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
6201
    do_apply_event(). We still check here to prevent future coding
6202
    errors.
6203 6204 6205 6206
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
6207 6208 6209 6210
    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.
6211
  */
6212
  if (!thd->lock)
6213
  {
6214 6215
    bool need_reopen= 1; /* To execute the first lap of the loop below */

6216
    /*
6217
      lock_tables() reads the contents of thd->lex, so they must be
6218
      initialized. Contrary to in
6219
      Table_map_log_event::do_apply_event() we don't call
6220
      mysql_init_query() as that may reset the binlog format.
6221
    */
6222
    lex_start(thd);
6223

6224 6225 6226
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
6227 6228
      if (!need_reopen)
      {
6229
        if (thd->is_slave_error || thd->is_fatal_error)
6230 6231 6232 6233 6234 6235
        {
          /*
            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;
6236 6237 6238 6239 6240
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' in %s event: when locking tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"),
                      get_type_str());
6241 6242 6243 6244
          thd->is_fatal_error= 1;
        }
        else
        {
6245 6246 6247
          rli->report(ERROR_LEVEL, error,
                      "Error in %s event: when locking tables",
                      get_type_str());
6248
        }
6249
        const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6250 6251
        DBUG_RETURN(error);
      }
6252

6253
      /*
6254
        So we need to reopen the tables.
6255

6256 6257
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
6258

6259 6260 6261
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
6262

6263 6264
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
6265 6266
       */
      thd->binlog_flush_pending_rows_event(false);
6267 6268
      TABLE_LIST *tables= rli->tables_to_lock;
      close_tables_for_reopen(thd, &tables);
6269

6270 6271
      uint tables_count= rli->tables_to_lock_count;
      if ((error= open_tables(thd, &tables, &tables_count, 0)))
6272
      {
6273
        if (thd->is_slave_error || thd->is_fatal_error)
6274 6275 6276 6277 6278 6279
        {
          /*
            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;
6280 6281 6282 6283
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' on reopening tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"));
6284
          thd->is_slave_error= 1;
6285
        }
6286
        const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6287
        DBUG_RETURN(error);
6288
      }
6289
    }
6290 6291 6292 6293 6294 6295 6296 6297 6298 6299

    /*
      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.
    */

    {
6300
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
6301 6302 6303 6304 6305 6306
      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;
6307
          thd->is_slave_error= 1;
6308
          const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6309 6310 6311 6312 6313
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

6314
    /*
6315 6316
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
6317 6318 6319

      We also invalidate the query cache for all the tables, since
      they will now be changed.
6320 6321 6322 6323 6324 6325 6326

      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.
6327
     */
6328
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
6329
    {
6330
      const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
6331
    }
6332 6333 6334
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
6335 6336
  }

6337 6338
  TABLE* 
    table= 
6339
    m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
6340 6341 6342 6343 6344

  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
6345
      (this was set up by Table_map_log_event::do_apply_event()
6346
      which tested replicate-* rules).
6347
    */
6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374

    /*
      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));

6375 6376 6377 6378 6379 6380 6381 6382 6383
    /*
      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.
     */
6384
    const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
6385

6386 6387
     if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
      set_flags(COMPLETE_ROWS_F);
6388

6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404
    /* 
      Set tables write and read sets.
      
      Read_set contains all slave columns (in case we are going to fetch
      a complete record from slave)
      
      Write_set equals the m_cols bitmap sent from master but it can be 
      longer if slave has extra columns. 
     */ 

    DBUG_PRINT_BITSET("debug", "Setting table's write_set from: %s", &m_cols);
    
    bitmap_set_all(table->read_set);
    bitmap_set_all(table->write_set);
    if (!get_flags(COMPLETE_ROWS_F))
      bitmap_intersect(table->write_set,&m_cols);
6405

6406 6407 6408
    // Do event specific preparations 
    
    error= do_before_row_operations(rli);
6409

6410
    // row processing loop
6411

6412 6413
    while (error == 0 && m_curr_row < m_rows_end)
    {
6414 6415 6416 6417
      /* 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;
6418 6419 6420

      error= do_exec_row(rli);

6421 6422 6423 6424 6425 6426
      table->in_use = old_thd;
      switch (error)
      {
      case 0:
	break;

6427
      /* Some recoverable errors */
6428
      case HA_ERR_RECORD_CHANGED:
6429 6430 6431 6432 6433
      case HA_ERR_RECORD_DELETED:
      case HA_ERR_KEY_NOT_FOUND:
      case HA_ERR_END_OF_FILE:
        /* Idempotency support: OK if tuple does not exist */
        DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
6434 6435
        error= 0;
        break;
6436 6437

      default:
6438
	rli->report(ERROR_LEVEL, thd->net.last_errno,
6439 6440 6441
                    "Error in %s event: row application failed. %s",
                    get_type_str(),
                    thd->net.last_error ? thd->net.last_error : "");
6442
	thd->is_slave_error= 1;
6443 6444 6445
	break;
      }

6446 6447 6448 6449 6450 6451 6452
      /*
       If m_curr_row_end  was not set during event execution (e.g., because
       of errors) we can't proceed to the next row. If the error is transient
       (i.e., error==0 at this point) we must call unpack_current_row() to set 
       m_curr_row_end.
      */ 
   
6453 6454 6455 6456
      DBUG_PRINT("info", ("error: %d", error));
      DBUG_PRINT("info", ("curr_row: 0x%lu; curr_row_end: 0x%lu; rows_end: 0x%lu",
                          (ulong) m_curr_row, (ulong) m_curr_row_end, (ulong) m_rows_end));

6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468
      if (!m_curr_row_end && !error)
        unpack_current_row(rli);
  
      // at this moment m_curr_row_end should be set
      DBUG_ASSERT(error || m_curr_row_end != NULL); 
      DBUG_ASSERT(error || m_curr_row < m_curr_row_end);
      DBUG_ASSERT(error || m_curr_row_end <= m_rows_end);
  
      m_curr_row= m_curr_row_end;
 
    } // row processing loop

6469
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
6470
                    const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
6471
    error= do_after_row_operations(rli, error);
6472
    if (!cache_stmt)
6473 6474 6475 6476
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
6477
  } // if (table)
6478

6479
  /*
6480 6481
    We need to delay this clear until here bacause unpack_current_row() uses
    master-side table definitions stored in rli.
6482 6483
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
6484
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6485

6486 6487
  if (error)
  {                     /* error has occured during the transaction */
6488
    rli->report(ERROR_LEVEL, thd->net.last_errno,
6489
                "Error in %s event: error during transaction execution "
6490
                "on table %s.%s. %s",
6491
                get_type_str(), table->s->db.str,
6492 6493
                table->s->table_name.str,
                thd->net.last_error ? thd->net.last_error : "");
6494

6495
    /*
6496 6497 6498 6499 6500 6501 6502 6503
      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.
unknown's avatar
unknown committed
6504
      rollback at the caller along with sbr.
6505
    */
unknown's avatar
unknown committed
6506
    thd->reset_current_stmt_binlog_row_based();
6507
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, error);
6508
    thd->is_slave_error= 1;
6509 6510 6511
    DBUG_RETURN(error);
  }

6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533
  /*
    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
6534
      Relay_log_info::last_event_start_time and all its occurrences.
6535
    */
6536
    const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
6537 6538 6539 6540 6541
  }

  DBUG_RETURN(0);
}

6542
Log_event::enum_skip_reason
6543
Rows_log_event::do_shall_skip(Relay_log_info *rli)
6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555
{
  /*
    If the slave skip counter is 1 and this event does not end a
    statement, then we should not start executing on the next event.
    Otherwise, we defer the decision to the normal skipping logic.
  */
  if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}

6556
int
6557
Rows_log_event::do_update_pos(Relay_log_info *rli)
6558 6559 6560 6561 6562 6563 6564
{
  DBUG_ENTER("Rows_log_event::do_update_pos");
  int error= 0;

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

6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582
  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);
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    /*
      If this event is not in a transaction, the call below will, if some
      transactional storage engines are involved, commit the statement into
      them and flush the pending event to binlog.
      If this event is in a transaction, the call will do nothing, but a
      Xid_log_event will come next which will, if some transactional engines
      are involved, commit the transaction and flush the pending event to the
      binlog.
    */
    error= ha_autocommit_or_rollback(thd, 0);
6594

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

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    thd->reset_current_stmt_binlog_row_based();
6606
    rli->cleanup_context(thd, 0);
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    if (error == 0)
    {
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      /*
        Indicate that a statement is finished.
        Step the group log position if we are not in a transaction,
        otherwise increase the event log position.
       */
      rli->stmt_done(log_pos, when);

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      /*
        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
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      rli->report(ERROR_LEVEL, error,
                  "Error in %s event: commit of row events failed, "
                  "table `%s`.`%s`",
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                  get_type_str(), m_table->s->db.str,
                  m_table->s->table_name.str);
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  }
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  else
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  {
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    rli->inc_event_relay_log_pos();
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  }

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  DBUG_RETURN(error);
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}
6640

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

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
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  uchar buf[ROWS_HEADER_LEN];	// No need to init the buffer
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  DBUG_ASSERT(m_table_id != ~0UL);
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + 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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  uchar sbuf[sizeof(m_width)];
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  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
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  bool res= false;
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  uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
  DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
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  DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
  res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
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  DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
  res= res || my_b_safe_write(file, (uchar*) m_cols.bitmap,
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                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
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    DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
              no_bytes_in_map(&m_cols_ai));
    res= res || my_b_safe_write(file, (uchar*) m_cols_ai.bitmap,
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                                no_bytes_in_map(&m_cols_ai));
  }
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  DBUG_DUMP("rows", m_rows_buf, data_size);
  res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
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  return res;

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}
#endif

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

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#ifdef MYSQL_CLIENT
void Rows_log_event::print_helper(FILE *file,
                                  PRINT_EVENT_INFO *print_event_info,
                                  char const *const name)
{
  IO_CACHE *const head= &print_event_info->head_cache;
  IO_CACHE *const body= &print_event_info->body_cache;
  if (!print_event_info->short_form)
  {
    bool const last_stmt_event= get_flags(STMT_END_F);
    print_header(head, print_event_info, !last_stmt_event);
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    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
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    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
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    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
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  }
}
#endif

6732
/**************************************************************************
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	Table_map_log_event member functions and support functions
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**************************************************************************/

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

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

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

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#if !defined(MYSQL_CLIENT)
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/**
  Save the field metadata based on the real_type of the field.
  The metadata saved depends on the type of the field. Some fields
  store a single byte for pack_length() while others store two bytes
  for field_length (max length).
  
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  @retval  0  Ok.
6776

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

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/*
  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),
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    m_colcnt(tbl->s->fields),
    m_memory(NULL),
    m_table_id(tid),
    m_flags(flags),
    m_data_size(0),
    m_field_metadata(0),
    m_field_metadata_size(0),
    m_null_bits(0),
    m_meta_memory(NULL)
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{
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  DBUG_ASSERT(m_table_id != ~0UL);
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  /*
    In TABLE_SHARE, "db" and "table_name" are 0-terminated (see this comment in
    table.cc / alloc_table_share():
      Use the fact the key is db/0/table_name/0
    As we rely on this let's assert it.
  */
  DBUG_ASSERT((tbl->s->db.str == 0) ||
              (tbl->s->db.str[tbl->s->db.length] == 0));
  DBUG_ASSERT(tbl->s->table_name.str[tbl->s->table_name.length] == 0);


  m_data_size=  TABLE_MAP_HEADER_LEN;
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;);
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  m_data_size+= m_dblen + 2;	// Include length and terminating \0
  m_data_size+= m_tbllen + 2;	// Include length and terminating \0
  m_data_size+= 1 + m_colcnt;	// COLCNT and column types

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  /* If malloc fails, caught in is_valid() */
6846
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
6847
  {
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    m_coltype= reinterpret_cast<uchar*>(m_memory);
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    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
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  /*
    Calculate a bitmap for the results of maybe_null() for all columns.
    The bitmap is used to determine when there is a column from the master
    that is not on the slave and is null and thus not in the row data during
    replication.
  */
  uint num_null_bytes= (m_table->s->fields + 7) / 8;
  m_data_size+= num_null_bytes;
  m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                 &m_null_bits, num_null_bytes,
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                                 &m_field_metadata, (m_colcnt * 2),
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                                 NULL);
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  bzero(m_field_metadata, (m_colcnt * 2));

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

  /*
    Now set the size of the data to the size of the field metadata array
    plus one or two bytes for number of elements in the field metadata array.
  */
  if (m_field_metadata_size > 255)
    m_data_size+= m_field_metadata_size + 2; 
  else
    m_data_size+= m_field_metadata_size + 1; 

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

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

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

  : Log_event(buf, description_event),
#ifndef MYSQL_CLIENT
6901
    m_table(NULL),
6902
#endif
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    m_dbnam(NULL), m_dblen(0), m_tblnam(NULL), m_tbllen(0),
    m_colcnt(0), m_coltype(0),
    m_memory(NULL), m_table_id(ULONG_MAX), m_flags(0),
    m_data_size(0), m_field_metadata(0), m_field_metadata_size(0),
    m_null_bits(0), m_meta_memory(NULL)
6908
{
6909
  unsigned int bytes_read= 0;
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  DBUG_ENTER("Table_map_log_event::Table_map_log_event(const char*,uint,...)");

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

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  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
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  DBUG_DUMP("event buffer", (uchar*) buf, event_len);
6923
#endif
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  /* Read the post-header */
  const char *post_start= buf + common_header_len;

  post_start+= TM_MAPID_OFFSET;
  if (post_header_len == 6)
  {
    /* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
    m_table_id= uint4korr(post_start);
    post_start+= 4;
  }
  else
  {
    DBUG_ASSERT(post_header_len == TABLE_MAP_HEADER_LEN);
6938
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= TM_FLAGS_OFFSET;
  }

6942
  DBUG_ASSERT(m_table_id != ~0UL);
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  m_flags= uint2korr(post_start);

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

  /* Extract the length of the various parts from the buffer */
6950
  uchar const *const ptr_dblen= (uchar const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
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  /* Length of database name + counter + terminating null */
6954
  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
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  /* Length of table name + counter + terminating null */
6958
  uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
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  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
6961

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  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
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                     (ulong) m_dblen, (long) (ptr_dblen-(const uchar*)vpart), 
                     (ulong) m_tbllen, (long) (ptr_tbllen-(const uchar*)vpart),
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                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
6966

6967
  /* Allocate mem for all fields in one go. If fails, caught in is_valid() */
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  m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                     &m_dbnam, (uint) m_dblen + 1,
                                     &m_tblnam, (uint) m_tbllen + 1,
                                     &m_coltype, (uint) m_colcnt,
                                     NullS);
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  if (m_memory)
  {
    /* Copy the different parts into their memory */
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    strncpy(const_cast<char*>(m_dbnam), (const char*)ptr_dblen  + 1, m_dblen + 1);
    strncpy(const_cast<char*>(m_tblnam), (const char*)ptr_tbllen + 1, m_tbllen + 1);
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    memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
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    ptr_after_colcnt= ptr_after_colcnt + m_colcnt;
    bytes_read= ptr_after_colcnt - (uchar *)buf;
    DBUG_PRINT("info", ("Bytes read: %d.\n", bytes_read));
    if (bytes_read < event_len)
    {
      m_field_metadata_size= net_field_length(&ptr_after_colcnt);
6987
      DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
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      uint num_null_bytes= (m_colcnt + 7) / 8;
      m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                     &m_null_bits, num_null_bytes,
                                     &m_field_metadata, m_field_metadata_size,
                                     NULL);
      memcpy(m_field_metadata, ptr_after_colcnt, m_field_metadata_size);
      ptr_after_colcnt= (uchar*)ptr_after_colcnt + m_field_metadata_size;
      memcpy(m_null_bits, ptr_after_colcnt, num_null_bytes);
    }
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  }

  DBUG_VOID_RETURN;
}
#endif

Table_map_log_event::~Table_map_log_event()
{
7005
  my_free(m_meta_memory, MYF(MY_ALLOW_ZERO_PTR));
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  my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR));
}

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

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7021
int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
7022
{
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  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
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  DBUG_ENTER("Table_map_log_event::do_apply_event(Relay_log_info*)");
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  DBUG_ASSERT(rli->sql_thd == thd);

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

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  if (!(memory= my_multi_malloc(MYF(MY_WME),
                                &table_list, (uint) sizeof(RPL_TABLE_LIST),
                                &db_mem, (uint) NAME_LEN + 1,
                                &tname_mem, (uint) NAME_LEN + 1,
                                NullS)))
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    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
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  bzero(table_list, sizeof(*table_list));
  table_list->db = db_mem;
  table_list->alias= table_list->table_name = tname_mem;
  table_list->lock_type= TL_WRITE;
  table_list->next_global= table_list->next_local= 0;
  table_list->table_id= m_table_id;
  table_list->updating= 1;
  strmov(table_list->db, rpl_filter->get_rewrite_db(m_dbnam, &dummy_len));
  strmov(table_list->table_name, m_tblnam);
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  int error= 0;

7054 7055 7056
  if (!rpl_filter->db_ok(table_list->db) ||
      (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list)))
  {
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    my_free(memory, MYF(MY_WME));
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  }
  else
7060
  {
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    /*
      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.
    */
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    lex_start(thd);
    mysql_reset_thd_for_next_command(thd);
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    /*
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      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.
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    */
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    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
7075
    {
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      thd->set_current_stmt_binlog_row_based();
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    }

    /*
7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095
      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.
7096 7097
    */
    uint count;
7098 7099 7100
    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)))
7101
    {
7102
      if (thd->is_slave_error || thd->is_fatal_error)
7103
      {
7104 7105 7106 7107 7108
        /*
          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;
7109 7110 7111 7112 7113
        rli->report(ERROR_LEVEL, 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);
7114
        thd->is_slave_error= 1;
7115
      }
7116
      goto err;
7117 7118
    }

7119
    m_table= table_list->table;
7120 7121 7122 7123 7124 7125 7126

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

7127 7128 7129
    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
7130 7131 7132

      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
7133
      inside Relay_log_info::clear_tables_to_lock() by calling the
7134
      table_def destructor explicitly.
7135
    */
7136 7137
    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt, 
         m_field_metadata, m_field_metadata_size, m_null_bits);
7138
    table_list->m_tabledef_valid= TRUE;
7139 7140

    /*
7141
      We record in the slave's information that the table should be
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7142
      locked by linking the table into the list of tables to lock.
7143
    */
7144
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
7145 7146
    const_cast<Relay_log_info*>(rli)->tables_to_lock= table_list;
    const_cast<Relay_log_info*>(rli)->tables_to_lock_count++;
7147
    /* 'memory' is freed in clear_tables_to_lock */
7148 7149
  }

7150
  DBUG_RETURN(error);
7151

7152
err:
7153
  my_free(memory, MYF(MY_WME));
7154 7155
  DBUG_RETURN(error);
}
7156

7157
Log_event::enum_skip_reason
7158
Table_map_log_event::do_shall_skip(Relay_log_info *rli)
7159 7160 7161 7162 7163
{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
7164
  return continue_group(rli);
7165 7166
}

7167
int Table_map_log_event::do_update_pos(Relay_log_info *rli)
7168 7169 7170 7171 7172
{
  rli->inc_event_relay_log_pos();
  return 0;
}

7173 7174 7175 7176 7177
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
7178
  DBUG_ASSERT(m_table_id != ~0UL);
7179
  uchar buf[TABLE_MAP_HEADER_LEN];
7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198
  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);

7199 7200
  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
7201

7202 7203 7204
  uchar cbuf[sizeof(m_colcnt)];
  uchar *const cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
  DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
7205

7206 7207 7208 7209
  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
7210
  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
7211

7212
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
7213
          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
7214
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
7215 7216
          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
7217 7218 7219 7220
          my_b_safe_write(file, m_coltype, m_colcnt) ||
          my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
          my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
          my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
7221 7222 7223 7224 7225 7226 7227 7228 7229 7230
 }
#endif

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

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

7231
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
7232 7233 7234
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
7235
    size_t bytes= my_snprintf(buf, sizeof(buf),
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7236
                                 "table_id: %lu (%s.%s)",
7237
                              m_table_id, m_dbnam, m_tblnam);
7238 7239
    protocol->store(buf, bytes, &my_charset_bin);
}
7240 7241
#endif

7242 7243 7244 7245 7246 7247 7248 7249 7250

#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  if (!print_event_info->short_form)
  {
7251 7252 7253 7254 7255
    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);
7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289
  }
}
#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)
7290 7291
int 
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
7292 7293 7294 7295 7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309
{
  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;
7310 7311 7312
  /* 
     Do not raise the error flag in case of hitting to an unique attribute
  */
7313
  m_table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
7314 7315 7316 7317 7318 7319
  /* 
     NDB specific: update from ndb master wrapped as Write_rows
  */
  /*
    so that the event should be applied to replace slave's row
  */
7320
  m_table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
7321 7322 7323 7324 7325
  /* 
     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.
  */
7326
  m_table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
7327 7328 7329 7330 7331
  /*
    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.
  */
7332
  m_table->file->ha_start_bulk_insert(0);
7333 7334 7335 7336 7337 7338 7339 7340 7341 7342 7343 7344 7345 7346 7347
  /*
    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).
  */
7348
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
7349 7350 7351
  return error;
}

7352 7353 7354
int 
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                              int error)
7355
{
7356
  int local_error= 0;
7357 7358
  m_table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
  m_table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
7359 7360 7361 7362 7363 7364
  /*
    reseting the extra with 
    table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
    fires bug#27077
    todo: explain or fix
  */
7365
  if ((local_error= m_table->file->ha_end_bulk_insert()))
7366
  {
7367
    m_table->file->print_error(local_error, MYF(0));
7368 7369
  }
  return error? error : local_error;
7370 7371
}

7372
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7373 7374 7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385

/*
  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;
}

7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410
/**
   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;
}

7411 7412
/**
  Write the current row into event's table.
7413

7414 7415 7416 7417 7418
  The row is located in the row buffer, pointed by @c m_curr_row member.
  Number of columns of the row is stored in @c m_width member (it can be 
  different from the number of columns in the table to which we insert). 
  Bitmap @c m_cols indicates which columns are present in the row. It is assumed 
  that event's table is already open and pointed by @c m_table.
7419

7420 7421 7422 7423 7424
  If the same record already exists in the table it can be either overwritten 
  or an error is reported depending on the value of @c overwrite flag 
  (error reporting not yet implemented). Note that the matching record can be
  different from the row we insert if we use primary keys to identify records in
  the table.
7425

7426 7427 7428 7429
  The row to be inserted can contain values only for selected columns. The 
  missing columns are filled with default values using @c prepare_record() 
  function. If a matching record is found in the table and @c overwritte is
  true, the missing columns are taken from it.
7430

7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446
  @param  rli   Relay log info (needed for row unpacking).
  @param  overwrite  
                Shall we overwrite if the row already exists or signal 
                error (currently ignored).

  @returns Error code on failure, 0 on success.

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

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

int
7447
Rows_log_event::write_row(const Relay_log_info *const rli,
7448
                          const bool overwrite)
7449
{
7450 7451
  DBUG_ENTER("write_row");
  DBUG_ASSERT(m_table != NULL && thd != NULL);
7452

7453
  TABLE *table= m_table;  // pointer to event's table
7454 7455 7456 7457
  int error;
  int keynum;
  auto_afree_ptr<char> key(NULL);

7458 7459 7460 7461 7462 7463 7464 7465 7466
  /* fill table->record[0] with default values */

  if ((error= prepare_record(rli, table, m_width,
                             TRUE /* check if columns have def. values */)))
    DBUG_RETURN(error);
  
  /* unpack row into table->record[0] */
  error= unpack_current_row(rli); // TODO: how to handle errors?

7467
#ifndef DBUG_OFF
7468
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7469 7470 7471 7472
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

7473 7474 7475 7476 7477 7478 7479 7480
  /* 
    Try to write record. If a corresponding record already exists in the table,
    we try to change it using ha_update_row() if possible. Otherwise we delete
    it and repeat the whole process again. 

    TODO: Add safety measures against infinite looping. 
   */

7481 7482
  while ((error= table->file->ha_write_row(table->record[0])))
  {
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7483 7484 7485 7486 7487
    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);
    }
7488 7489
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
7490
      DBUG_PRINT("info",("Can't locate duplicate key (get_dup_key returns %d)",keynum));
7491 7492 7493 7494 7495 7496
      table->file->print_error(error, MYF(0));
      /*
        We failed to retrieve the duplicate key
        - either because the error was not "duplicate key" error
        - or because the information which key is not available
      */
7497
      DBUG_RETURN(error);
7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509
    }

    /*
       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.
     */
7510
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
7511
    {
7512
      DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
7513
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
7514
      if (error)
7515
      {
7516
        DBUG_PRINT("info",("rnd_pos() returns error %d",error));
7517
        table->file->print_error(error, MYF(0));
7518
        DBUG_RETURN(error);
7519
      }
7520 7521 7522
    }
    else
    {
7523 7524
      DBUG_PRINT("info",("Locating offending record using index_read_idx()"));

7525 7526
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
7527
        DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
7528
        DBUG_RETURN(my_errno);
7529 7530 7531 7532 7533 7534
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
7535 7536
        {
          DBUG_PRINT("info",("Can't allocate key buffer"));
7537
          DBUG_RETURN(ENOMEM);
7538
        }
7539 7540
      }

7541 7542
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
               0);
7543 7544 7545 7546
      error= table->file->index_read_idx_map(table->record[1], keynum,
                                             (const uchar*)key.get(),
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT);
7547
      if (error)
7548
      {
7549
        DBUG_PRINT("info",("index_read_idx() returns error %d",error)); 
7550
        table->file->print_error(error, MYF(0));
7551
        DBUG_RETURN(error);
7552
      }
7553 7554 7555
    }

    /*
7556
       Now, record[1] should contain the offending row.  That
7557 7558
       will enable us to update it or, alternatively, delete it (so
       that we can insert the new row afterwards).
7559
     */
7560

7561 7562 7563
    /*
      If row is incomplete we will use the record found to fill 
      missing columns.  
7564
    */
7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575
    if (!get_flags(COMPLETE_ROWS_F))
    {
      restore_record(table,record[1]);
      error= unpack_current_row(rli);
    }

#ifndef DBUG_OFF
    DBUG_PRINT("debug",("preparing for update: before and after image"));
    DBUG_DUMP("record[1] (before)", table->record[1], table->s->reclength);
    DBUG_DUMP("record[0] (after)", table->record[0], table->s->reclength);
#endif
7576

7577
    /*
7578 7579 7580 7581 7582 7583 7584 7585 7586 7587 7588 7589 7590 7591 7592 7593 7594
       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())
    {
7595
      DBUG_PRINT("info",("Updating row using ha_update_row()"));
7596 7597
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
7598 7599 7600 7601 7602
      switch (error) {
                
      case HA_ERR_RECORD_IS_THE_SAME:
        DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
                           " ha_update_row()"));
7603
        error= 0;
7604 7605 7606 7607 7608 7609 7610 7611 7612
      
      case 0:
        break;
        
      default:    
        DBUG_PRINT("info",("ha_update_row() returns error %d",error));
        table->file->print_error(error, MYF(0));
      }
      
7613
      DBUG_RETURN(error);
7614 7615 7616
    }
    else
    {
7617
      DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
7618
      if ((error= table->file->ha_delete_row(table->record[1])))
7619
      {
7620
        DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
7621
        table->file->print_error(error, MYF(0));
7622
        DBUG_RETURN(error);
7623
      }
7624 7625 7626
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
7627

7628
  DBUG_RETURN(error);
7629 7630
}

7631 7632 7633
#endif

int 
7634
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
7635
{
7636 7637 7638 7639 7640 7641 7642
  DBUG_ASSERT(m_table != NULL);
  int error= write_row(rli, TRUE /* overwrite */);
  
  if (error && !thd->net.last_errno)
    thd->net.last_errno= error;
      
  return error; 
7643
}
7644

7645 7646 7647 7648 7649
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
7650
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
7651 7652 7653 7654 7655 7656 7657 7658
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7659 7660 7661 7662 7663 7664
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
7665
{
7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677
  /*
    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.
   */

7678 7679 7680
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
  DBUG_DUMP("record[1]", table->record[1], table->s->reclength);

7681
  bool result= FALSE;
7682
  uchar saved_x[2], saved_filler[2];
7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695

  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);
    }
  }

7696
  if (table->s->blob_fields + table->s->varchar_fields == 0)
7697 7698 7699 7700 7701
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

7702 7703 7704 7705
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
7706 7707 7708 7709 7710
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

7711 7712
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
7713
  {
7714
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
7715 7716 7717 7718
    {
      result= TRUE;
      goto record_compare_exit;
    }
7719
  }
7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733 7734

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];
    }
7735
  }
7736 7737

  return result;
7738 7739
}

7740 7741
/**
  Locate the current row in event's table.
7742

7743 7744 7745 7746
  The current row is pointed by @c m_curr_row. Member @c m_width tells how many 
  columns are there in the row (this can be differnet from the number of columns 
  in the table). It is assumed that event's table is already open and pointed 
  by @c m_table.
7747

7748 7749 7750
  If a corresponding record is found in the table it is stored in 
  @c m_table->record[0]. Note that when record is located based on a primary 
  key, it is possible that the record found differs from the row being located.
7751

7752 7753 7754 7755 7756
  If no key is specified or table does not have keys, a table scan is used to 
  find the row. In that case the row should be complete and contain values for
  all columns. However, it can still be shorter than the table, i.e. the table 
  can contain extra columns not present in the row. It is also possible that 
  the table has fewer columns than the row being located. 
7757

7758 7759 7760 7761
  @returns Error code on failure, 0 on success. 
  
  @post In case of success @c m_table->record[0] contains the record found. 
  Also, the internal "cursor" of the table is positioned at the record found.
7762

7763 7764
  @note If the engine allows random access of the records, a combination of
  @c position() and @c rnd_pos() will be used. 
7765
 */
7766

7767
int Rows_log_event::find_row(const Relay_log_info *rli)
7768
{
7769
  DBUG_ENTER("Rows_log_event::find_row");
7770 7771

  DBUG_ASSERT(m_table && m_table->in_use != NULL);
7772

7773 7774
  TABLE *table= m_table;
  int error;
7775

7776
  /* unpack row - missing fields get default values */
7777

7778 7779 7780 7781 7782 7783
  // TODO: shall we check and report errors here?
  prepare_record(NULL,table,m_width,FALSE /* don't check errors */); 
  error= unpack_current_row(rli); 

#ifndef DBUG_OFF
  DBUG_PRINT("info",("looking for the following record"));
7784
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7785
#endif
7786

7787 7788
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
7789 7790 7791 7792 7793 7794
  {
    /*
      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
7795
      the "cursor" (i.e., record[0] in this case) at the correct row.
7796 7797 7798 7799 7800 7801 7802 7803 7804 7805 7806

      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);

7807
    */
7808
    DBUG_PRINT("info",("locating record using primary key (position)"));
7809
    int error= table->file->rnd_pos_by_record(table->record[0]);
7810 7811 7812 7813 7814
    if (error)
    {
      DBUG_PRINT("info",("rnd_pos returns error %d",error));
      table->file->print_error(error, MYF(0));
    }
7815
    DBUG_RETURN(error);
7816 7817
  }

7818
  // We can't use position() - try other methods.
7819 7820 7821 7822 7823
  
  /* 
    We need to retrieve all fields
    TODO: Move this out from this function to main loop 
   */
7824
  table->use_all_columns();
unknown's avatar
unknown committed
7825

7826 7827 7828 7829 7830 7831
  /*
    Save copy of the record in table->record[1]. It might be needed 
    later if linear search is used to find exact match.
   */ 
  store_record(table,record[1]);    

7832 7833
  if (table->s->keys > 0)
  {
7834 7835
    DBUG_PRINT("info",("locating record using primary key (index_read)"));

7836
    /* We have a key: search the table using the index */
7837
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
7838 7839 7840
    {
      DBUG_PRINT("info",("ha_index_init returns error %d",error));
      table->file->print_error(error, MYF(0));
7841
      DBUG_RETURN(error);
7842
    }
7843

7844 7845 7846 7847 7848 7849 7850 7851 7852
    /* Fill key data for the row */

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

    /*
      Don't print debug messages when running valgrind since they can
      trigger false warnings.
     */
7853
#ifndef HAVE_purify
7854
    DBUG_DUMP("key data", m_key, table->key_info->key_length);
7855 7856
#endif

7857 7858 7859 7860 7861 7862
    /*
      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.
    */
7863 7864
    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
7865 7866 7867
    table->record[0][pos]= 0xFF;
    
    if ((error= table->file->index_read_map(table->record[0], m_key, 
7868
                                            HA_WHOLE_KEY,
7869
                                            HA_READ_KEY_EXACT)))
7870
    {
7871
      DBUG_PRINT("info",("no record matching the key found in the table"));
7872
      table->file->print_error(error, MYF(0));
7873
      table->file->ha_index_end();
7874 7875 7876
      DBUG_RETURN(error);
    }

7877 7878 7879 7880 7881
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7882 7883
    DBUG_PRINT("info",("found first matching record")); 
    DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7884
#endif
7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897
    /*
      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.
7898
    */
7899
    if (table->key_info->flags & HA_NOSAME)
7900 7901
    {
      table->file->ha_index_end();
7902
      DBUG_RETURN(0);
7903
    }
7904

7905 7906
    /*
      In case key is not unique, we still have to iterate over records found
7907 7908
      and find the one which is identical to the row given. A copy of the 
      record we are looking for is stored in record[1].
7909 7910 7911
     */ 
    DBUG_PRINT("info",("non-unique index, scanning it to find matching record")); 

7912
    while (record_compare(table))
7913
    {
7914 7915 7916 7917 7918
      /*
        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.
7919 7920 7921

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
7922
      */
7923 7924
      if (table->s->null_bytes > 0)
      {
7925
        table->record[0][table->s->null_bytes - 1]|=
7926 7927 7928
          256U - (1U << table->s->last_null_bit_pos);
      }

7929
      if ((error= table->file->index_next(table->record[0])))
7930
      {
7931 7932
        DBUG_PRINT("info",("no record matching the given row found"));
        table->file->print_error(error, MYF(0));
7933
        table->file->ha_index_end();
7934
        DBUG_RETURN(error);
7935 7936
      }
    }
7937 7938 7939 7940 7941

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
7942 7943 7944
  }
  else
  {
7945 7946
    DBUG_PRINT("info",("locating record using table scan (rnd_next)"));

7947
    int restart_count= 0; // Number of times scanning has restarted from top
7948 7949 7950

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
7951 7952 7953 7954 7955 7956
    {
      DBUG_PRINT("info",("error initializing table scan"
                         " (ha_rnd_init returns %d)",error));
      table->file->print_error(error, MYF(0));
      DBUG_RETURN(error);
    }
7957 7958

    /* Continue until we find the right record or have made a full loop */
7959 7960
    do
    {
7961
      error= table->file->rnd_next(table->record[0]);
7962

7963
      switch (error) {
7964

7965 7966
      case 0:
      case HA_ERR_RECORD_DELETED:
7967
        break;
7968 7969

      case HA_ERR_END_OF_FILE:
7970 7971 7972
        if (++restart_count < 2)
          table->file->ha_rnd_init(1);
        break;
7973 7974

      default:
7975 7976 7977
        DBUG_PRINT("info", ("Failed to get next record"
                            " (rnd_next returns %d)",error));
        table->file->print_error(error, MYF(0));
7978
        table->file->ha_rnd_end();
7979
        DBUG_RETURN(error);
7980 7981
      }
    }
7982
    while (restart_count < 2 && record_compare(table));
7983 7984 7985 7986 7987
    
    /* 
      Note: above record_compare will take into accout all record fields 
      which might be incorrect in case a partial row was given in the event
     */
7988

7989 7990 7991
    /*
      Have to restart the scan to be able to fetch the next row.
    */
7992 7993
    if (restart_count == 2)
      DBUG_PRINT("info", ("Record not found"));
7994 7995
    else
      DBUG_DUMP("record found", table->record[0], table->s->reclength);
7996 7997
    table->file->ha_rnd_end();

7998
    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == HA_ERR_RECORD_DELETED || error == 0);
7999 8000 8001 8002 8003
    DBUG_RETURN(error);
  }

  DBUG_RETURN(0);
}
8004

8005 8006 8007 8008 8009 8010 8011 8012 8013 8014 8015 8016 8017 8018 8019 8020 8021 8022 8023 8024 8025 8026 8027 8028 8029 8030 8031 8032 8033
#endif

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

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

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

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

8034 8035 8036 8037 8038
int 
Delete_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if ((m_table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      m_table->s->primary_key < MAX_KEY)
8039 8040
  {
    /*
8041
      We don't need to allocate any memory for m_key since it is not used.
8042 8043 8044 8045
    */
    return 0;
  }

8046
  if (m_table->s->keys > 0)
8047
  {
8048 8049 8050 8051
    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
8052
  }
8053
  return 0;
8054 8055
}

8056 8057 8058
int 
Delete_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
8059 8060
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
8061 8062
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR));
8063
  m_key= NULL;
8064 8065 8066 8067

  return error;
}

8068
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8069
{
8070
  int error;
8071
  DBUG_ASSERT(m_table != NULL);
8072

8073
  if (!(error= find_row(rli))) 
8074 8075
  { 
    /*
8076
      Delete the record found, located in record[0]
8077
    */
8078
    error= m_table->file->ha_delete_row(m_table->record[0]);
8079
  }
8080 8081 8082 8083 8084 8085 8086 8087 8088
  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)
{
8089
  Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
8090 8091 8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102
}
#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,
8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114
                                             ulong tid,
                                             MY_BITMAP const *cols_bi,
                                             MY_BITMAP const *cols_ai,
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols_bi, is_transactional)
{
  init(cols_ai);
}

Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                             ulong tid,
                                             MY_BITMAP const *cols,
8115 8116 8117
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
8118 8119 8120 8121 8122
  init(cols);
}

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
8123
  /* if bitmap_init fails, caught in is_valid() */
8124 8125
  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
8126
                          m_width,
8127 8128 8129 8130
                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
8131
    {
8132
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
8133 8134
      create_last_word_mask(&m_cols_ai);
    }
8135
  }
8136 8137 8138
}
#endif /* !defined(MYSQL_CLIENT) */

8139 8140 8141 8142 8143 8144 8145 8146 8147

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().
}


8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162
/*
  Constructor used by slave to read the event from the binary log.
 */
#ifdef HAVE_REPLICATION
Update_rows_log_event::Update_rows_log_event(const char *buf, uint event_len,
                                             const
                                             Format_description_log_event
                                             *description_event)
  : Rows_log_event(buf, event_len, UPDATE_ROWS_EVENT, description_event)
{
}
#endif

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

8163 8164 8165 8166
int 
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if (m_table->s->keys > 0)
8167
  {
8168 8169 8170 8171
    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
8172 8173
  }

8174
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
8175

8176
  return 0;
8177 8178
}

8179 8180 8181
int 
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
8182
{
8183 8184 8185
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
8186
  m_key= NULL;
8187 8188 8189 8190

  return error;
}

8191
int 
8192
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8193
{
8194
  DBUG_ASSERT(m_table != NULL);
8195

8196 8197
  int error= find_row(rli); 
  if (error)
8198 8199 8200 8201 8202 8203 8204
  {
    /*
      We need to read the second image in the event of error to be
      able to skip to the next pair of updates
    */
    m_curr_row= m_curr_row_end;
    unpack_current_row(rli);
8205
    return error;
8206
  }
8207

8208
  /*
8209
    This is the situation after locating BI:
8210

8211 8212 8213
    ===|=== before image ====|=== after image ===|===
       ^                     ^
       m_curr_row            m_curr_row_end
8214

8215 8216 8217
    BI found in the table is stored in record[0]. We copy it to record[1]
    and unpack AI to record[0].
   */
8218

8219
  store_record(m_table,record[1]);
8220

8221 8222
  m_curr_row= m_curr_row_end;
  error= unpack_current_row(rli); // this also updates m_curr_row_end
8223

8224
  /*
8225
    Now we have the right row to update.  The old row (the one we're
8226
    looking for) is in record[1] and the new row is in record[0].
8227
  */
8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238
#ifndef HAVE_purify
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
  DBUG_PRINT("info",("Updating row in table"));
  DBUG_DUMP("old record", m_table->record[1], m_table->s->reclength);
  DBUG_DUMP("new values", m_table->record[0], m_table->s->reclength);
#endif

  error= m_table->file->ha_update_row(m_table->record[1], m_table->record[0]);
8239 8240
  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 0;
8241 8242 8243

  return error;
}
8244

8245 8246 8247 8248 8249 8250
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
8251
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
8252 8253 8254
}
#endif

8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271

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;
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  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
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  read_str(&ptr, str_end, &str, &len);
  m_message.str= const_cast<char*>(str);
  m_message.length= len;
  DBUG_PRINT("info", ("m_incident: %d", m_incident));
  DBUG_VOID_RETURN;
}


Incident_log_event::~Incident_log_event()
{
}


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

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

  DBUG_ASSERT(0 <= m_incident);
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  DBUG_ASSERT((size_t) m_incident <= sizeof(description)/sizeof(*description));
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  return description[m_incident];
}


#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
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  size_t bytes;
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  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
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Incident_log_event::do_apply_event(Relay_log_info const *rli)
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{
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  DBUG_ENTER("Incident_log_event::do_apply_event");
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  rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
              ER(ER_SLAVE_INCIDENT),
              description(),
              m_message.length > 0 ? m_message.str : "<none>");
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  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));
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  uchar buf[sizeof(int16)];
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  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));
}