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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/*
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  Ignore error code specified on command line
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*/
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inline int ignored_error_code(int err_code)
{
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#ifdef HAVE_NDB_BINLOG
  /*
    The following error codes are hard-coded and will always be ignored.
  */
  switch (err_code)
  {
  case ER_DB_CREATE_EXISTS:
  case ER_DB_DROP_EXISTS:
    return 1;
  default:
    /* Nothing to do */
    break;
  }
#endif
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  return ((err_code == ER_SLAVE_IGNORED_TABLE) ||
          (use_slave_mask && bitmap_is_set(&slave_error_mask, err_code)));
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}
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#endif
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/*
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  pretty_print_str()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static char *pretty_print_str(char *packet, char *str, int len)
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{
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  char *end= str + len;
  char *pos= packet;
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  *pos++= '\'';
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  while (str < end)
  {
    char c;
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    switch ((c=*str++)) {
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    case '\n': *pos++= '\\'; *pos++= 'n'; break;
    case '\r': *pos++= '\\'; *pos++= 'r'; break;
    case '\\': *pos++= '\\'; *pos++= '\\'; break;
    case '\b': *pos++= '\\'; *pos++= 'b'; break;
    case '\t': *pos++= '\\'; *pos++= 't'; break;
    case '\'': *pos++= '\\'; *pos++= '\''; break;
    case 0   : *pos++= '\\'; *pos++= '0'; break;
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    default:
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      *pos++= c;
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      break;
    }
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  }
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  *pos++= '\'';
  return pos;
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}
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#endif /* !MYSQL_CLIENT */
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/*
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  Creates a temporary name for load data infile:

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

  RETURN
    Pointer to start of extension
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static char *slave_load_file_stem(char *buf, uint file_id,
                                  int event_server_id, const char *ext)
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{
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  char *res;
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  fn_format(buf,"SQL_LOAD-",slave_load_tmpdir, "", MY_UNPACK_FILENAME);
  to_unix_path(buf);

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  buf = strend(buf);
  buf = int10_to_str(::server_id, buf, 10);
  *buf++ = '-';
  buf = int10_to_str(event_server_id, buf, 10);
  *buf++ = '-';
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  res= int10_to_str(file_id, buf, 10);
  strmov(res, ext);                             // Add extension last
  return res;                                   // Pointer to extension
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}
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#endif
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/*
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  Delete all temporary files used for SQL_LOAD.

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  SYNOPSIS
    cleanup_load_tmpdir()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static void cleanup_load_tmpdir()
{
  MY_DIR *dirp;
  FILEINFO *file;
  uint i;
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  char fname[FN_REFLEN], prefbuf[31], *p;
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  if (!(dirp=my_dir(slave_load_tmpdir,MYF(MY_WME))))
    return;

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

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

  my_dirend(dirp);
}
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#endif
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/*
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  write_str()
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*/
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static bool write_str(IO_CACHE *file, char *str, uint length)
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{
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  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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/*
  Transforms a string into "" or its expression in 0x... form.
*/
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char *str_to_hex(char *to, const char *from, uint len)
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{
  if (len)
  {
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    *to++= '0';
    *to++= 'x';
    to= octet2hex(to, from, len);
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  }
  else
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    to= strmov(to, "\"\"");
  return to;                               // pointer to end 0 of 'to'
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}

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/*
  Append a version of the 'from' string suitable for use in a query to
  the 'to' string.  To generate a correct escaping, the character set
  information in 'csinfo' is used.
 */
#ifndef MYSQL_CLIENT
int
append_query_string(CHARSET_INFO *csinfo,
                    String const *from, String *to)
{
  char *beg, *ptr;
  uint32 const orig_len= to->length();
  if (to->reserve(orig_len + from->length()*2+3))
    return 1;

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

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

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

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


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

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Log_event::Log_event()
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  :temp_buf(0), exec_time(0), flags(0), cache_stmt(0),
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   thd(0)
{
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  server_id=	::server_id;
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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
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int Log_event::do_update_pos(Relay_log_info *rli)
605
{
606
  /*
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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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  Log_event::net_send()
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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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/*
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  Log_event::init_show_field_list()
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*/
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void Log_event::init_show_field_list(List<Item>* field_list)
{
  field_list->push_back(new Item_empty_string("Log_name", 20));
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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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*/
726

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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
  */
740

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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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  Log_event::read_log_event()
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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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*/
808

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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");
816

817
  if (log_lock)
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    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (uchar*) buf, sizeof(buf)))
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  {
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    /*
      If the read hits eof, we must report it as eof so the caller
      will know it can go into cond_wait to be woken up on the next
      update to the log.
    */
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    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
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      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
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    goto end;
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  }
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  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
834
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
836
  {
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    DBUG_PRINT("error",("data_len: %ld", data_len));
838
    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 */
854
    if (packet->append(file, data_len))
855
    {
856
      /*
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        Fatal error occured when appending rest of the event
        to packet, possible failures:
	1. EOF occured when reading from file, it's really an error
           as data_len is >=0 there's supposed to be more bytes available.
           file->error will have been set to number of bytes left to read
        2. Read was interrupted, file->error would normally be set to -1
        3. Failed to allocate memory for packet, my_errno
           will be ENOMEM(file->error shuold be 0, but since the
           memory allocation occurs before the call to read it might
           be uninitialized)
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      */
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      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
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      /* Implicit goto end; */
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    }
872
  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
877
  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);
884
#else
885
#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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/*
890 891
  Log_event::read_log_event()

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  NOTE:
893
    Allocates memory;  The caller is responsible for clean-up.
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*/
895

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#ifndef MYSQL_CLIENT
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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
902
Log_event* Log_event::read_log_event(IO_CACHE* file,
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                                     const Format_description_log_event
                                     *description_event)
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#endif
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{
907
  DBUG_ENTER("Log_event::read_log_event");
908
  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
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920
  LOCK_MUTEX;
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  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
922
  if (my_b_read(file, (uchar *) head, header_size))
923
  {
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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;
927
    /*
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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.
931
    */
932
    DBUG_RETURN(0);
933
  }
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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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943
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

949
  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)))
969
    res->register_temp_buf(buf);
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971
err:
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  UNLOCK_MUTEX;
973
  if (!res)
974
  {
975
    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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  }
990
  DBUG_RETURN(res);
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}

993

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/*
995
  Log_event::read_log_event()
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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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{
1004 1005
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
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  DBUG_ASSERT(description_event != 0);
1007
  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
1008
  /* Check the integrity */
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  if (event_len < EVENT_LEN_OFFSET ||
1010
      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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  }
1016

1017
  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;
1024
  case NEW_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 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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  */
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  if (!ev || !ev->is_valid())
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  {
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    DBUG_PRINT("error",("Found invalid event in binary log"));

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

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#ifdef MYSQL_CLIENT
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/*
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  Log_event::print_header()
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*/
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void Log_event::print_header(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool is_more __attribute__((unused)))
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{
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  char llbuff[22];
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  my_off_t hexdump_from= print_event_info->hexdump_from;
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  DBUG_ENTER("Log_event::print_header");
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  my_b_printf(file, "#");
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  print_timestamp(file);
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  my_b_printf(file, " server id %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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  Query_log_event::pack_info()
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  This (which is used only for SHOW BINLOG EVENTS) could be updated to
  print SET @@session_var=. But this is not urgent, as SHOW BINLOG EVENTS is
  only an information, it does not produce suitable queries to replay (for
  example it does not print LOAD DATA INFILE).
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*/
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void Query_log_event::pack_info(Protocol *protocol)
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{
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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 */
static void write_str_with_code_and_len(char **dst, const char *src,
                                        int len, uint code)
{
  DBUG_ASSERT(src);
  *((*dst)++)= code;
  *((*dst)++)= (uchar) len;
  bmove(*dst, src, len);
  (*dst)+= len;
}


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/*
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  Query_log_event::write()
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  NOTES:
    In this event we have to modify the header to have the correct
    EVENT_LEN_OFFSET as we don't yet know how many status variables we
    will print!
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*/
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bool Query_log_event::write(IO_CACHE* file)
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{
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  /**
    @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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/*
  Query_log_event::Query_log_event()
 
  The simplest constructor that could possibly work.  This is used for
  creating static objects that have a special meaning and are invisible
  to the log.  
*/
Query_log_event::Query_log_event()
  :Log_event(), data_buf(0)
{
}

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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
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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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  Query_log_event::Query_log_event()
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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;
1908
    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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1921
#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))))
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#endif
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      DBUG_VOID_RETURN;
1935
  if (catalog_len)                                  // If catalog is given
1936
  {
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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
    */
1942
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1943
      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;
    }
1950
  }
1951
  if (time_zone_len)
1952
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
1953

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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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}

1970

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/*
1972
  Query_log_event::print()
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*/
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#ifdef MYSQL_CLIENT
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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);
2007

2008
  /*
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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
2086
    }
2087
    if (unlikely(bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6)))
2088
    {
2089 2090 2091
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
2092
        /* for mysql client */
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        my_b_printf(file, "/*!\\C %s */%s\n",
                    cs_info->csname, print_event_info->delimiter);
2095
      }
2096 2097 2098 2099
      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);
2106 2107
    }
  }
2108 2109
  if (time_zone_len)
  {
2110 2111
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
2112
    {
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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);
2116 2117
    }
  }
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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);
2122 2123
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
2124 2125 2126
  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);
2129
    else
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      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
2132 2133
    print_event_info->charset_database_number= charset_database_number;
  }
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}

2136

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void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
2139 2140 2141
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
2142
  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 */
2146

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/*
2149
  Query_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2153

2154
int Query_log_event::do_apply_event(Relay_log_info const *rli)
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{
2156
  return do_apply_event(rli, query, q_len);
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}


2160
int Query_log_event::do_apply_event(Relay_log_info const *rli,
2161
                                      const char *query_arg, uint32 q_len_arg)
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{
2163
  LEX_STRING new_db;
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  int expected_error,actual_error= 0;
2165
  /*
2166 2167 2168
    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
2169
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
2170
    you.
2171
  */
2172
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
2173 2174 2175
  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' */
2176 2177
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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2179
  /*
2180 2181 2182 2183 2184 2185 2186 2187
    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.
2188
  */
2189
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
2190 2191
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

2192 2193
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
  const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
2194

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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
2202
            ::do_apply_event(), then the companion SET also have so
2203
            we don't need to reset_one_shot_variables().
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  */
2205
  if (rpl_filter->db_ok(thd->db))
2206 2207
  {
    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));
2211
    thd->query_id = next_query_id();
2212
    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));
2215

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    if (ignored_error_code((expected_error= error_code)) ||
2217
	!check_expected_error(thd,rli,expected_error))
2218 2219 2220
    {
      if (flags2_inited)
        /*
2221 2222
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
2223
        */
2224
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
2225 2226
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
2227 2228
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
2229 2230 2231 2232 2233
      */
      /*
        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
2234 2235 2236
        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))))
          {
            /*
2255 2256 2257 2258
              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).
2259
            */
2260
            set_slave_thread_default_charset(thd, rli);
2261 2262 2263 2264 2265
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
2266 2267 2268
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
2269
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
2270 2271 2272 2273 2274 2275
        {
          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;
2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
      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;
      
2304
      /* Execute the query (note that we bypass dispatch_command()) */
2305 2306
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
2307
      log_slow_statement(thd);
2308
    }
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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))
2319
        clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
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      else
2321
      {
2322
        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);
2329
        thd->is_slave_error= 1;
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      }
      goto end;
    }
2333

2334 2335
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
2336
      general_log_write(thd, COM_QUERY, thd->query, thd->query_length);
2337

2338
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",
2345
 		       expected_error, thd->net.last_errno));
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    if ((expected_error != (actual_error= thd->net.last_errno)) &&
2347 2348 2349
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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    {
2351
      rli->report(ERROR_LEVEL, 0,
2352 2353
                      "\
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'",
2356 2357 2358 2359 2360
                      ER_SAFE(expected_error),
                      expected_error,
                      actual_error ? thd->net.last_error: "no error",
                      actual_error,
                      print_slave_db_safe(db), query_arg);
2361
      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 ||
2367
 	     ignored_error_code(actual_error))
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    {
      DBUG_PRINT("info",("error ignored"));
2370
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
2371
      thd->killed= THD::NOT_KILLED;
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    }
    /*
      Other cases: mostly we expected no error and get one.
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    */
2376
    else if (thd->is_slave_error || thd->is_fatal_error)
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    {
2378
      rli->report(ERROR_LEVEL, actual_error,
2379 2380 2381 2382
                      "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);
2383
      thd->is_slave_error= 1;
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    }
2385 2386 2387 2388 2389 2390 2391 2392 2393

    /*
      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, ...);
2394
      thd->is_slave_error = 1;
2395 2396 2397 2398
      }
      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...
2399

2400 2401 2402 2403 2404 2405 2406
      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:
2410
  VOID(pthread_mutex_lock(&LOCK_thread_count));
2411 2412 2413 2414 2415 2416
  /*
    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
2417 2418 2419
    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.
2420
  */
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  thd->catalog= 0;
2422
  thd->set_db(NULL, 0);                 /* will free the current database */
2423
  DBUG_PRINT("info", ("end: query= 0"));
2424
  thd->query= 0;			// just to be sure
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  thd->query_length= 0;
2426
  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));
2439
  return thd->is_slave_error;
2440 2441
}

2442
int Query_log_event::do_update_pos(Relay_log_info *rli)
2443
{
2444
  /*
2445 2446 2447
    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.
2448
  */
2449 2450 2451 2452 2453 2454 2455
  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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}
2457 2458


2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482
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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2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500
/**************************************************************************
	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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/**************************************************************************
2502
	Start_log_event_v3 methods
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**************************************************************************/
2504

2505
#ifndef MYSQL_CLIENT
2506 2507 2508
Start_log_event_v3::Start_log_event_v3()
  :Log_event(), created(0), binlog_version(BINLOG_VERSION),
   artificial_event(0), dont_set_created(0)
2509 2510 2511 2512 2513
{
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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/*
2515
  Start_log_event_v3::pack_info()
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*/
2517

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2519
void Start_log_event_v3::pack_info(Protocol *protocol)
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{
2521 2522 2523 2524
  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
2529 2530


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/*
2532
  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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{
2538 2539 2540 2541 2542
  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)
2544
  {
2545 2546 2547 2548
    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);
2549
    if (created)
2550 2551
      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
2552
    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
2553 2554
      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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*/
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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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/*
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  Start_log_event_v3::do_apply_event()
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  The master started

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

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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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) */
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/***************************************************************************
       Format_description_log_event methods
****************************************************************************/

/*
  Format_description_log_event 1st ctor.

  SYNOPSIS
    Format_description_log_event::Format_description_log_event
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      binlog_version              the binlog version for which we want to build
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                                  an event. Can be 1 (=MySQL 3.23), 3 (=4.0.x
                                  x>=2 and 4.1) or 4 (MySQL 5.0). Note that the
                                  old 4.0 (binlog version 2) is not supported;
                                  it should not be used for replication with
                                  5.0.

  DESCRIPTION
    Ctor. Can be used to create the event to write to the binary log (when the
    server starts or when FLUSH LOGS), or to create artificial events to parse
    binlogs from MySQL 3.23 or 4.x.
    When in a client, only the 2nd use is possible.
*/

Format_description_log_event::
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Format_description_log_event(uint8 binlog_ver, const char* server_ver)
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  :Start_log_event_v3()
{
  binlog_version= binlog_ver;
  switch (binlog_ver) {
  case 4: /* MySQL 5.0 */
    memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
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    DBUG_EXECUTE_IF("pretend_version_50034_in_binlog",
                    strmov(server_version, "5.0.34"););
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    common_header_len= LOG_EVENT_HEADER_LEN;
    number_of_event_types= LOG_EVENT_TYPES;
    /* we'll catch my_malloc() error in is_valid() */
    post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
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                                       MYF(MY_ZEROFILL));
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    /*
      This long list of assignments is not beautiful, but I see no way to
      make it nicer, as the right members are #defines, not array members, so
      it's impossible to write a loop.
    */
    if (post_header_len)
    {
      post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
      post_header_len[QUERY_EVENT-1]= QUERY_HEADER_LEN;
      post_header_len[ROTATE_EVENT-1]= ROTATE_HEADER_LEN;
      post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
      post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
      post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
      post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
      post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
      post_header_len[NEW_LOAD_EVENT-1]= post_header_len[LOAD_EVENT-1];
      post_header_len[FORMAT_DESCRIPTION_EVENT-1]= FORMAT_DESCRIPTION_HEADER_LEN;
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      post_header_len[TABLE_MAP_EVENT-1]=    TABLE_MAP_HEADER_LEN;
      post_header_len[WRITE_ROWS_EVENT-1]=   ROWS_HEADER_LEN;
      post_header_len[UPDATE_ROWS_EVENT-1]=  ROWS_HEADER_LEN;
      post_header_len[DELETE_ROWS_EVENT-1]=  ROWS_HEADER_LEN;
      /*
        We here have the possibility to simulate a master of before we changed
        the table map id to be stored in 6 bytes: when it was stored in 4
        bytes (=> post_header_len was 6). This is used to test backward
        compatibility.
        This code can be removed after a few months (today is Dec 21st 2005),
        when we know that the 4-byte masters are not deployed anymore (check
        with Tomas Ulin first!), and the accompanying test (rpl_row_4_bytes)
        too.
      */
      DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                      post_header_len[TABLE_MAP_EVENT-1]=
                      post_header_len[WRITE_ROWS_EVENT-1]=
                      post_header_len[UPDATE_ROWS_EVENT-1]=
                      post_header_len[DELETE_ROWS_EVENT-1]= 6;);
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      post_header_len[BEGIN_LOAD_QUERY_EVENT-1]= post_header_len[APPEND_BLOCK_EVENT-1];
      post_header_len[EXECUTE_LOAD_QUERY_EVENT-1]= EXECUTE_LOAD_QUERY_HEADER_LEN;
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      post_header_len[INCIDENT_EVENT-1]= INCIDENT_HEADER_LEN;
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    }
    break;

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


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

Format_description_log_event::
Format_description_log_event(const char* buf,
                             uint event_len,
                             const
                             Format_description_log_event*
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                             description_event)
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  :Start_log_event_v3(buf, description_event)
{
  DBUG_ENTER("Format_description_log_event::Format_description_log_event(char*,...)");
  buf+= LOG_EVENT_MINIMAL_HEADER_LEN;
  if ((common_header_len=buf[ST_COMMON_HEADER_LEN_OFFSET]) < OLD_HEADER_LEN)
    DBUG_VOID_RETURN; /* sanity check */
  number_of_event_types=
    event_len-(LOG_EVENT_MINIMAL_HEADER_LEN+ST_COMMON_HEADER_LEN_OFFSET+1);
  DBUG_PRINT("info", ("common_header_len=%d number_of_event_types=%d",
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                      common_header_len, number_of_event_types));
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  /* If alloc fails, we'll detect it in is_valid() */
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  post_header_len= (uint8*) my_memdup((uchar*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
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                                      number_of_event_types*
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                                      sizeof(*post_header_len), MYF(0));
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  calc_server_version_split();
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  DBUG_VOID_RETURN;
}

2850
#ifndef MYSQL_CLIENT
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bool Format_description_log_event::write(IO_CACHE* file)
{
  /*
    We don't call Start_log_event_v3::write() because this would make 2
    my_b_safe_write().
  */
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  uchar buff[FORMAT_DESCRIPTION_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
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  if (!dont_set_created)
    created= when= get_time();
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  int4store(buff + ST_CREATED_OFFSET,created);
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  buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
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  memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (uchar*) post_header_len,
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         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
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2871
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
2873
{
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  DBUG_ENTER("Format_description_log_event::do_apply_event");
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#ifdef USING_TRANSACTIONS
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  /*
    As a transaction NEVER spans on 2 or more binlogs:
    if we have an active transaction at this point, the master died
    while writing the transaction to the binary log, i.e. while
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    flushing the binlog cache to the binlog. XA guarantees that master has
    rolled back. So we roll back.
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    Note: this event could be sent by the master to inform us of the
    format of its binlog; in other words maybe it is not at its
    original place when it comes to us; we'll know this by checking
    log_pos ("artificial" events have log_pos == 0).
  */
  if (!artificial_event && created && thd->transaction.all.nht)
  {
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    /* This is not an error (XA is safe), just an information */
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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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}
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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"
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    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
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}
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void Load_log_event::print_query(bool need_db, char *buf,
                                 char **end, char **fn_start, char **fn_end)
{
  char *pos= buf;

  if (need_db && db && db_len)
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  {
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    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
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  pos= strmov(pos, "LOAD DATA ");
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  if (fn_start)
    *fn_start= pos;

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  if (check_fname_outside_temp_buf())
    pos= strmov(pos, "LOCAL ");
  pos= strmov(pos, "INFILE '");
3049
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
3051

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  if (sql_ex.opt_flags & REPLACE_FLAG)
3053
    pos= strmov(pos, " REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
3055 3056
    pos= strmov(pos, " IGNORE ");

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

  pos= strmov(pos ," TABLE `");
3063 3064 3065
  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 */
3067
  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);
3073

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
3076

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
3079 3080
  if (sql_ex.line_start_len)
  {
3081
    pos= strmov(pos, " STARTING BY ");
3082
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
3083
  }
3084

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  if ((long) skip_lines > 0)
3086 3087
  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
3089 3090
    pos= strmov(pos," LINES ");    
  }
3091 3092 3093 3094

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
3096
    pos= strmov(pos, " (");
3097 3098 3099
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
3104
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
3107
    }
3108
    *pos++= ')';
3109
  }
3110

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  *end= pos;
}


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

3119
  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));
3124
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3126

3127

3128 3129
#ifndef MYSQL_CLIENT

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/*
3131
  Load_log_event::write_data_header()
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*/
3133

3134
bool Load_log_event::write_data_header(IO_CACHE* file)
3135
{
3136
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
3138 3139 3140 3141 3142
  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);
3143
  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
3144
}
3145

3146

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/*
3148
  Load_log_event::write_data_body()
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*/
3150

3151
bool Load_log_event::write_data_body(IO_CACHE* file)
3152
{
3153 3154 3155
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
3156
  {
3157 3158
    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
3159
      return 1;
3160
  }
3161 3162 3163
  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));
3164 3165
}

3166

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/*
3168
  Load_log_event::Load_log_event()
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*/
3170

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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,
3175
			       bool ignore, bool using_trans)
3176
  :Log_event(thd_arg,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
3178
             using_trans),
3179
   thread_id(thd_arg->thread_id),
3180
   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 : ""),
3184
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
3188
  exec_time = (ulong) (end_time  - thd_arg->start_time);
3189 3190 3191
  /* 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;
3205
    
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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;
3210

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  sql_ex.empty_flags= 0;
3212

3213
  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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  }
3221 3222
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
3223

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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;
3234
    
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  skip_lines = ex->skip_lines;
3236

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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);
3248 3249
  }

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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3253
#endif /* !MYSQL_CLIENT */
3254

3255

3256
/*
3257
  Load_log_event::Load_log_event()
3258

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3259 3260 3261
  NOTE
    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
3262 3263
*/

3264 3265 3266 3267
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");
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282
  /*
    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;
3284 3285
}

3286

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/*
3288
  Load_log_event::copy_log_event()
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3289
*/
3290

3291
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
3292 3293
                                   int body_offset,
                                   const Format_description_log_event *description_event)
3294
{
3295
  DBUG_ENTER("Load_log_event::copy_log_event");
3296
  uint data_len;
3297
  char* buf_end = (char*)buf + event_len;
3298 3299
  /* 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);
3301 3302 3303 3304 3305
  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);
3309 3310 3311 3312
  /*
    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.
  */
3313 3314 3315
  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);
3317
  
3318
  data_len = event_len - body_offset;
3319
  if (num_fields > data_len) // simple sanity check against corruption
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    DBUG_RETURN(1);
3321
  for (uint i = 0; i < num_fields; i++)
3322
    field_block_len += (uint)field_lens[i] + 1;
3323

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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;
3328 3329
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
3330

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3331
  DBUG_RETURN(0);
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}


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/*
3336
  Load_log_event::print()
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3337
*/
3338 3339

#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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3346
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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			   bool commented)
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{
3349 3350
  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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3352
  if (!print_event_info->short_form)
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3353
  {
3354 3355 3356
    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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3357 3358
  }

3359
  bool different_db= 1;
3360
  if (db)
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3361
  {
3362 3363 3364 3365 3366 3367
    /*
      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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3368
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
3369
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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  }
3372
  
3373
  if (db && db[0] && different_db)
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    my_b_printf(&cache, "%suse %s%s\n", 
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            commented ? "# " : "",
3376
            db, print_event_info->delimiter);
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3377

3378
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
3380 3381
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
3382
  my_b_printf(&cache, "%sLOAD DATA ",
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3383
              commented ? "# " : "");
3384
  if (check_fname_outside_temp_buf())
3385 3386
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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3387

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  if (sql_ex.opt_flags & REPLACE_FLAG)
3389
    my_b_printf(&cache," REPLACE ");
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3390
  else if (sql_ex.opt_flags & IGNORE_FLAG)
3391
    my_b_printf(&cache," IGNORE ");
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3393 3394 3395
  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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3397
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
3398 3399 3400
    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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3402 3403
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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3405 3406
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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3409
  if (sql_ex.line_start)
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  {
3411 3412
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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  }
3414
  if ((long) skip_lines > 0)
3415
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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3417 3418 3419 3420
  if (num_fields)
  {
    uint i;
    const char* field = fields;
3421
    my_b_printf(&cache, " (");
3422
    for (i = 0; i < num_fields; i++)
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    {
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      if (i)
3425 3426
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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3427
	  
3428
      field += field_lens[i]  + 1;
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    }
3430
    my_b_printf(&cache, ")");
3431
  }
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3432

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3433
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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3434
  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
3437

3438

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/*
3440
  Load_log_event::set_fields()
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3441 3442 3443 3444 3445

  Note that this function can not use the member variable 
  for the database, since LOAD DATA INFILE on the slave
  can be for a different database than the current one.
  This is the reason for the affected_db argument to this method.
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*/
3447

3448
#ifndef MYSQL_CLIENT
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void Load_log_event::set_fields(const char* affected_db, 
3450 3451
				List<Item> &field_list,
                                Name_resolution_context *context)
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{
  uint i;
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  const char* field = fields;
3455
  for (i= 0; i < num_fields; i++)
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  {
3457 3458
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
3459
    field+= field_lens[i]  + 1;
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  }
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}
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#endif /* !MYSQL_CLIENT */
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SCRUM  
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3465
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/*
  Does the data loading job when executing a LOAD DATA on the slave
3468

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3469
  SYNOPSIS
3470
    Load_log_event::do_apply_event
3471 3472 3473
      net
      rli
      use_rli_only_for_errors	  - if set to 1, rli is provided to
3474
                                  Load_log_event::do_apply_event
3475 3476 3477 3478 3479 3480
                                  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
3481
                                  Execute_load_log_event::do_apply_event).
3482 3483 3484
                                  - if set to 0, rli is provided for
                                  full use, i.e. for error reports and
                                  position advancing.
3485

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  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
3488

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3489
  RETURN VALUE
3490
    0           Success
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    1    	Failure
*/
3493

3494
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
3495
                                   bool use_rli_only_for_errors)
3496
{
3497 3498 3499 3500
  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);
3501
  DBUG_ASSERT(thd->query == 0);
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  thd->query_length= 0;                         // Should not be needed
3503
  thd->is_slave_error= 0;
3504
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
3505

3506
  /* see Query_log_event::do_apply_event() and BUG#13360 */
3507
  DBUG_ASSERT(!rli->m_table_map.count());
3508
  /*
3509
    Usually lex_start() is called by mysql_parse(), but we need it here
3510 3511
    as the present method does not call mysql_parse().
  */
3512 3513 3514
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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3515
  if (!use_rli_only_for_errors)
3516
  {
3517 3518
    /*
      Saved for InnoDB, see comment in
3519
      Query_log_event::do_apply_event()
3520
    */
3521
    const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
3522
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
3523
  }
3524 3525
 
   /*
3526 3527 3528 3529 3530 3531 3532
    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
3533
    done by testing rules in Create_file_log_event::do_apply_event()
3534 3535 3536
    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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3537 3538 3539 3540 3541 3542 3543 3544


    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
3545
            ::do_apply_event(), then the companion SET also have so
3546
            we don't need to reset_one_shot_variables().
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3547
  */
3548
  if (rpl_filter->db_ok(thd->db))
3549
  {
3550 3551
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
3552
    thd->query_id = next_query_id();
3553
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
3554 3555 3556 3557 3558 3559
    /*
      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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3560
    mysql_reset_errors(thd, 0);
3561 3562 3563

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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3564
    tables.db= thd->strmake(thd->db, thd->db_length);
3565
    tables.alias = tables.table_name = (char*) table_name;
3566
    tables.lock_type = TL_WRITE;
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3567
    tables.updating= 1;
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3568

3569
    // the table will be opened in mysql_load    
3570
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
3571 3572 3573 3574 3575 3576 3577 3578
    {
      // 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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3579
      char *end;
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3580
      enum enum_duplicates handle_dup;
3581
      bool ignore= 0;
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3582 3583
      char *load_data_query;

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3584
      /*
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3585 3586
        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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3587
      */
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3588
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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3589
      {
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3590 3591 3592 3593 3594
        /*
          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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3595
      }
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3596 3597 3598 3599 3600 3601 3602

      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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3603
      if (sql_ex.opt_flags & REPLACE_FLAG)
3604
      {
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3605
	handle_dup= DUP_REPLACE;
3606
      }
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3607
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3608 3609 3610 3611
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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3612
      else
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3613
      {
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3614
        /*
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3615
	  When replication is running fine, if it was DUP_ERROR on the
3616
          master then we could choose IGNORE here, because if DUP_ERROR
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3617
          suceeded on master, and data is identical on the master and slave,
3618
          then there should be no uniqueness errors on slave, so IGNORE is
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3619
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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3620 3621 3622
          (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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3623 3624

          If reading from net (a 3.23 master), mysql_load() will change this
3625
          to IGNORE.
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3626 3627
        */
        handle_dup= DUP_ERROR;
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3628
      }
3629 3630 3631 3632 3633 3634 3635 3636 3637 3638
      /*
        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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3639

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3640
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3641 3642 3643 3644 3645
      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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3646 3647 3648 3649 3650
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3651 3652 3653 3654 3655 3656

      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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3657
      List<Item> field_list;
3658 3659
      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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3660
      thd->variables.pseudo_thread_id= thread_id;
3661 3662 3663 3664 3665 3666 3667 3668 3669
      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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3670
      /*
3671
        It is safe to use tmp_list twice because we are not going to
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3672 3673
        update it inside mysql_load().
      */
3674 3675
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
3676
                     handle_dup, ignore, net != 0))
3677
        thd->is_slave_error= 1;
3678
      if (thd->cuted_fields)
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3679
      {
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3680
	/* log_pos is the position of the LOAD event in the master log */
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3681 3682 3683 3684 3685 3686 3687
        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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3688
      }
3689 3690 3691
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3692 3693
  }
  else
3694 3695 3696 3697 3698 3699 3700 3701 3702
  {
    /*
      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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3703 3704

error:
3705
  thd->net.vio = 0; 
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3706
  const char *remember_db= thd->db;
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3707
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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3708
  thd->catalog= 0;
3709
  thd->set_db(NULL, 0);                   /* will free the current database */
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3710
  thd->query= 0;
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3711
  thd->query_length= 0;
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3712
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3713
  close_thread_tables(thd);
3714 3715

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
3716
                  thd->is_slave_error= 0; thd->is_fatal_error= 1;);
3717

3718
  if (thd->is_slave_error)
3719
  {
3720
    /* this err/sql_errno code is copy-paste from net_send_error() */
unknown's avatar
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3721 3722 3723 3724 3725 3726 3727 3728 3729
    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);       
    }
3730
    rli->report(ERROR_LEVEL, sql_errno,"\
unknown's avatar
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3731
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3732
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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3733
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3734 3735
    return 1;
  }
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3736
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3737

3738
  if (thd->is_fatal_error)
3739
  {
3740 3741 3742 3743 3744 3745 3746 3747 3748
    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);
3749 3750 3751
    return 1;
  }

3752
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
3753
}
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SCRUM  
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3754
#endif
3755 3756


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3757
/**************************************************************************
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3758
  Rotate_log_event methods
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3759
**************************************************************************/
3760

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3761
/*
3762
  Rotate_log_event::pack_info()
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3763
*/
3764

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3765
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3766
void Rotate_log_event::pack_info(Protocol *protocol)
3767
{
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3768
  char buf1[256], buf[22];
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3769
  String tmp(buf1, sizeof(buf1), log_cs);
3770
  tmp.length(0);
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3771
  tmp.append(new_log_ident, ident_len);
3772
  tmp.append(STRING_WITH_LEN(";pos="));
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3773 3774
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3775
}
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3776
#endif
3777

3778

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3779
/*
3780
  Rotate_log_event::print()
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3781
*/
3782 3783

#ifdef MYSQL_CLIENT
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3784
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3785
{
3786
  char buf[22];
3787 3788
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3789

unknown's avatar
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3790
  if (print_event_info->short_form)
3791
    return;
3792 3793
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
3794
  if (new_log_ident)
3795
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
3796
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
3797
}
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3798
#endif /* MYSQL_CLIENT */
3799 3800


3801

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3802
/*
3803
  Rotate_log_event::Rotate_log_event() (2 constructors)
unknown's avatar
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3804
*/
3805

3806 3807

#ifndef MYSQL_CLIENT
3808
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3809 3810 3811 3812 3813 3814 3815 3816
                                   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];
3817
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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3818 3819
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
3820 3821
#endif
  if (flags & DUP_NAME)
3822
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3823 3824 3825 3826 3827
  DBUG_VOID_RETURN;
}
#endif


3828 3829
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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3830
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3831
{
3832
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3833
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3834 3835
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3836 3837
  uint ident_offset;
  if (event_len < header_size)
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3838
    DBUG_VOID_RETURN;
3839
  buf += header_size;
3840 3841 3842 3843
  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; 
3844
  set_if_smaller(ident_len,FN_REFLEN-1);
3845
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
3846
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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3847
  DBUG_VOID_RETURN;
3848
}
3849 3850


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3851
/*
3852
  Rotate_log_event::write()
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3853
*/
3854

3855
#ifndef MYSQL_CLIENT
3856
bool Rotate_log_event::write(IO_CACHE* file)
3857
{
3858
  char buf[ROTATE_HEADER_LEN];
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3859
  int8store(buf + R_POS_OFFSET, pos);
3860
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
3861 3862
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
3863
}
3864
#endif
3865

3866

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3867
/*
3868
  Rotate_log_event::do_apply_event()
3869

3870
  Got a rotate log event from the master
3871

3872 3873 3874
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3875

3876
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3877
    in a A -> B -> A setup.
3878
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3879 3880 3881

  RETURN VALUES
    0	ok
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3882
*/
3883

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3884
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3885
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
3886
{
3887
  DBUG_ENTER("Rotate_log_event::do_update_pos");
3888 3889 3890 3891
#ifndef DBUG_OFF
  char buf[32];
#endif

3892 3893
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
3894 3895
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
3896 3897

  pthread_mutex_lock(&rli->data_lock);
3898
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3899
  /*
3900 3901 3902 3903
    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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3904 3905 3906 3907 3908
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
3909 3910 3911 3912

    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
3913
    relay log, which shall not change the group positions.
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3914
  */
3915
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
3916
      !rli->is_in_group())
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3917
  {
3918 3919 3920 3921
    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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3922 3923
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3924
    rli->group_master_log_pos= pos;
3925 3926 3927
    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();
3928
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3929 3930
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
3931
                        rli->group_master_log_name,
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3932
                        (ulong) rli->group_master_log_pos));
3933
    /*
3934 3935
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3936 3937 3938 3939 3940
      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);
3941
    set_slave_thread_default_charset(thd, rli);
3942
    thd->variables.sql_mode= global_system_variables.sql_mode;
3943 3944
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3945
  }
3946 3947 3948
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
3949

3950
  DBUG_RETURN(0);
3951
}
3952

3953 3954

Log_event::enum_skip_reason
3955
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
3956
{
3957
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
3958 3959

  switch (reason) {
3960
  case Log_event::EVENT_SKIP_NOT:
3961
  case Log_event::EVENT_SKIP_COUNT:
3962
    return Log_event::EVENT_SKIP_NOT;
3963

3964 3965
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
3966 3967
  }
  DBUG_ASSERT(0);
3968
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
3969 3970
}

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3971
#endif
3972 3973


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/**************************************************************************
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	Intvar_log_event methods
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**************************************************************************/
3977

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/*
3979
  Intvar_log_event::pack_info()
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*/
3981

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3983
void Intvar_log_event::pack_info(Protocol *protocol)
3984
{
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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);
3990
}
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#endif
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/*
3995
  Intvar_log_event::Intvar_log_event()
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*/
3997

3998 3999 4000
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4001
{
4002 4003 4004
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
4005 4006
}

4007

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/*
4009
  Intvar_log_event::get_var_type_name()
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*/
4011 4012

const char* Intvar_log_event::get_var_type_name()
4013
{
4014 4015 4016 4017 4018
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
4019 4020
}

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/*
4023
  Intvar_log_event::write()
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*/
4025

4026
#ifndef MYSQL_CLIENT
4027
bool Intvar_log_event::write(IO_CACHE* file)
4028
{
4029 4030
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
4031
  int8store(buf + I_VAL_OFFSET, val);
4032 4033
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4034
}
4035
#endif
4036

4037

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/*
4039
  Intvar_log_event::print()
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*/
4041 4042

#ifdef MYSQL_CLIENT
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void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4044
{
4045 4046 4047
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
4048 4049
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4050

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  if (!print_event_info->short_form)
4052
  {
4053 4054
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
4055
  }
4056

4057
  my_b_printf(&cache, "SET ");
4058 4059 4060 4061 4062 4063 4064
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
4065 4066 4067 4068
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
4069
  }
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  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
4072
}
4073
#endif
4074

4075

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/*
4077
  Intvar_log_event::do_apply_event()
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*/
4079

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#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
4081
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
4082
{
4083 4084 4085 4086
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4087
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4088

4089 4090
  switch (type) {
  case LAST_INSERT_ID_EVENT:
4091 4092
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
4093 4094
    break;
  case INSERT_ID_EVENT:
4095
    thd->force_one_auto_inc_interval(val);
4096 4097
    break;
  }
4098 4099 4100
  return 0;
}

4101
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
4102
{
4103
  rli->inc_event_relay_log_pos();
4104
  return 0;
4105
}
4106 4107 4108


Log_event::enum_skip_reason
4109
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
4110 4111
{
  /*
4112 4113 4114 4115 4116 4117
    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.
4118
  */
4119
  return continue_group(rli);
4120 4121
}

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#endif
4123

4124

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/**************************************************************************
4126
  Rand_log_event methods
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**************************************************************************/
4128

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4130
void Rand_log_event::pack_info(Protocol *protocol)
4131
{
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  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);
4137
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
4138
}
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#endif
4140 4141


4142 4143 4144
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4145
{
4146 4147 4148
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
4149 4150
}

4151

4152
#ifndef MYSQL_CLIENT
4153
bool Rand_log_event::write(IO_CACHE* file)
4154
{
4155
  uchar buf[16];
4156 4157
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
4158 4159
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4160
}
4161
#endif
4162

4163 4164

#ifdef MYSQL_CLIENT
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void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4166
{
4167 4168 4169
  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)
4172
  {
4173 4174
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
4175
  }
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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);
4179
}
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#endif /* MYSQL_CLIENT */
4181

4182

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4184
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
4185
{
4186 4187 4188 4189
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4190
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4191

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4192 4193
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
4194 4195 4196
  return 0;
}

4197
int Rand_log_event::do_update_pos(Relay_log_info *rli)
4198
{
4199
  rli->inc_event_relay_log_pos();
4200 4201
  return 0;
}
4202

4203 4204

Log_event::enum_skip_reason
4205
Rand_log_event::do_shall_skip(Relay_log_info *rli)
4206 4207
{
  /*
4208 4209 4210 4211 4212 4213
    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.
4214
  */
4215
  return continue_group(rli);
4216 4217
}

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#endif /* !MYSQL_CLIENT */
4219

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4221 4222 4223 4224 4225 4226 4227
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
4228 4229
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
4230
  pos= longlong10_to_str(xid, pos, 10);
4231
  pos= strmov(pos, " */");
4232 4233 4234 4235
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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/*
  NOTE it's ok not to use int8store here,
  as long as xid_t::set(ulonglong) and
  xid_t::get_my_xid doesn't do it either

  we don't care about actual values of xids as long as
  identical numbers compare identically
*/
4244 4245 4246 4247

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
4248 4249 4250
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
4251
  memcpy((char*) &xid, buf, sizeof(xid));
4252 4253 4254
}


4255
#ifndef MYSQL_CLIENT
4256 4257 4258
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
4259
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
4260
}
4261
#endif
4262 4263 4264


#ifdef MYSQL_CLIENT
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void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4266
{
4267 4268 4269
  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)
4271
  {
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    char buf[64];
    longlong10_to_str(xid, buf, 10);

4275 4276
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
4277
  }
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  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
4279 4280 4281 4282 4283
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4284
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
4285
{
4286
  /* For a slave Xid_log_event is COMMIT */
4287 4288
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
4289
  return end_trans(thd, COMMIT);
4290
}
4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301

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));
}
4302 4303 4304
#endif /* !MYSQL_CLIENT */


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4305
/**************************************************************************
4306
  User_var_log_event methods
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4307
**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
4313
  uint val_offset= 4 + name_len;
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  uint event_len= val_offset;

  if (is_null)
  {
4318 4319
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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4320 4321 4322 4323 4324 4325 4326 4327 4328
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
4329 4330 4331
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
4332 4333
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
4336 4337
      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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    case DECIMAL_RESULT:
    {
4342 4343 4344
      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
4347 4348
      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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    case STRING_RESULT:
4354
      /* 15 is for 'COLLATE' and other chars */
4355 4356
      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
4357
      CHARSET_INFO *cs;
4358 4359
      if (!buf)
        return;
4360 4361 4362 4363 4364 4365 4366
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
4367 4368 4369
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
4370 4371
        event_len= p-buf;
      }
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      break;
4373
    case ROW_RESULT:
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    default:
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4375 4376 4377 4378 4379
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
4380
  buf[1]= '`';
4381
  memcpy(buf+2, name, name_len);
4382 4383
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
4384
  protocol->store(buf, event_len, &my_charset_bin);
4385
  my_free(buf, MYF(0));
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}
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#endif /* !MYSQL_CLIENT */
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4388 4389


4390 4391 4392 4393
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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4394
{
4395
  buf+= description_event->common_header_len;
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4396 4397
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
4398 4399
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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  if (is_null)
  {
    type= STRING_RESULT;
4403
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
4409 4410 4411
    type= (Item_result) buf[UV_VAL_IS_NULL];
    charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
    val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
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		       UV_CHARSET_NUMBER_SIZE);
4413 4414
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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  }
}


4419
#ifndef MYSQL_CLIENT
4420
bool User_var_log_event::write(IO_CACHE* file)
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4421 4422 4423 4424
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
4425
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
4426
  uint buf1_length;
4427
  ulong event_length;
4428

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  int4store(buf, name_len);
4430 4431 4432 4433
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
4434
    val_len= 0;                                 // Length of 'pos'
4435 4436
  }    
  else
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4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447
  {
    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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4448 4449 4450 4451 4452 4453
    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;
4454
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
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4455 4456 4457
      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
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    case STRING_RESULT:
4459
      pos= (uchar*) val;
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      break;
4461
    case ROW_RESULT:
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    default:
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4463 4464 4465
      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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  }
4469 4470 4471 4472 4473

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

  return (write_header(file, event_length) ||
4474 4475 4476 4477
          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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}
4479
#endif
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4481

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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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{
4489 4490 4491
  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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  {
4494 4495
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

4498
  my_b_printf(&cache, "SET @`");
4499
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
4500
  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];
4525 4526
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

4530
      bin2decimal((uchar*) val+2, &dec, precision, scale);
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      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
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      my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
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      break;
    }
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    case STRING_RESULT:
4537
    {
4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551
      /*
        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.
      */
4552 4553 4554 4555
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
4556
        break; // no error, as we are 'void'
4557
      str_to_hex(hex_str, val, val_len);
4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568
      /*
        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);
4570
      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);
4574
      my_afree(hex_str);
4575
    }
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      break;
4577
    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
4585

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/*
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  User_var_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4592
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
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{
  Item *it= 0;
4595 4596 4597
  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;
4601 4602
  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.
   */
4608
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4609

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
4619
      it= new Item_float(real_val, 0);
4620
      val= (char*) &real_val;		// Pointer to value in native format
4621
      val_len= 8;
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      break;
    case INT_RESULT:
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      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
4627
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
4631
      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;
4640
    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);
4647 4648 4649 4650
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
4651
  e.fix_fields(thd, 0);
4652 4653 4654 4655 4656
  /*
    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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4660 4661 4662
  return 0;
}

4663
int User_var_log_event::do_update_pos(Relay_log_info *rli)
4664
{
4665
  rli->inc_event_relay_log_pos();
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  return 0;
}
4668

4669
Log_event::enum_skip_reason
4670
User_var_log_event::do_shall_skip(Relay_log_info *rli)
4671 4672 4673 4674 4675 4676 4677 4678 4679
{
  /*
    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.
  */
4680
  return continue_group(rli);
4681
}
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#endif /* !MYSQL_CLIENT */
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/**************************************************************************
4686
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
4690
#ifdef MYSQL_CLIENT
4691
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
4692
{
4693 4694
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
4696
    return;
4697 4698
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
4699 4700
}
#endif  
4701

4702
#ifndef MYSQL_CLIENT
4703
void Slave_log_event::pack_info(Protocol *protocol)
4704
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
4706 4707 4708 4709 4710 4711 4712
  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);
4714
  protocol->store(buf, pos-buf, &my_charset_bin);
4715
}
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#endif /* !MYSQL_CLIENT */
4717 4718 4719 4720


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
4721
				 Relay_log_info* rli)
4722
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
4723 4724 4725 4726
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
4727

4728
  Master_info* mi = rli->mi;
4729 4730 4731 4732
  // 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);
4733
  master_log_len = strlen(rli->group_master_log_name);
4734 4735 4736
  // 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))))
4737
  {
4738 4739 4740
    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;
4741
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
4742
    master_port = mi->port;
4743
    master_pos = rli->group_master_log_pos;
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    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
4745
			(ulong) master_pos));
4746
  }
4747 4748 4749 4750 4751 4752
  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 */
4754 4755 4756 4757 4758 4759 4760 4761 4762


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)
4764
{
4765 4766
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4767
  char llbuff[22];
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  if (print_event_info->short_form)
4769
    return;
4770 4771
  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",
4773 4774
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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#endif /* MYSQL_CLIENT */
4776 4777 4778 4779 4780 4781 4782 4783


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


4784
#ifndef MYSQL_CLIENT
4785
bool Slave_log_event::write(IO_CACHE* file)
4786
{
4787
  ulong event_length= get_data_size();
4788 4789 4790
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4791 4792

  return (write_header(file, event_length) ||
4793
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
4794
}
4795
#endif
4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806


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)
4807
  {
4808 4809
    master_host = 0;
    return;
4810
  }
4811 4812
  master_log_len = strlen(master_log);
}
4813

4814

4815 4816 4817
/* This code is not used, so has not been updated to be format-tolerant */
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
4818
{
4819
  if (event_len < LOG_EVENT_HEADER_LEN)
4820
    return;
4821
  event_len -= LOG_EVENT_HEADER_LEN;
4822 4823 4824 4825 4826
  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);
4827 4828
}

4829

4830
#ifndef MYSQL_CLIENT
4831
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
4832 4833 4834
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
4835
  return 0;
4836
}
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4837
#endif /* !MYSQL_CLIENT */
4838 4839


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4840
/**************************************************************************
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4841
	Stop_log_event methods
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4842
**************************************************************************/
4843

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/*
4845
  Stop_log_event::print()
4846
*/
4847 4848

#ifdef MYSQL_CLIENT
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void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4850
{
4851 4852 4853
  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)
4855 4856
    return;

4857 4858
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
4859
}
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4860
#endif /* MYSQL_CLIENT */
4861

4862

4863
/*
4864
  Stop_log_event::do_apply_event()
4865 4866 4867 4868 4869 4870 4871 4872

  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
4873
  Start_log_event_v3::do_apply_event(), not here. Because if we come
4874
  here, the master was sane.
4875 4876
*/

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

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4897
#endif /* !MYSQL_CLIENT */
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4898
#endif /* HAVE_REPLICATION */
4899

4900

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4901
/**************************************************************************
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4902
	Create_file_log_event methods
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4903
**************************************************************************/
4904 4905

/*
4906
  Create_file_log_event ctor
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4907
*/
4908 4909

#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,
4914
                      bool ignore,
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		      char* block_arg, uint block_len_arg, bool using_trans)
4916
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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		  using_trans),
4918
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4919
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4920
{
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4921
  DBUG_ENTER("Create_file_log_event");
4922
  sql_ex.force_new_format();
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  DBUG_VOID_RETURN;
4924
}
4925

4926

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4927
/*
4928
  Create_file_log_event::write_data_body()
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4929
*/
4930

4931
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4932
{
4933 4934
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4935
    return res;
4936 4937
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
4938 4939
}

4940

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4941
/*
4942
  Create_file_log_event::write_data_header()
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4943
*/
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4944

4945
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4946
{
4947
  bool res;
4948
  uchar buf[CREATE_FILE_HEADER_LEN];
4949 4950
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4951
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4952
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4953 4954 4955
}


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/*
4957
  Create_file_log_event::write_base()
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4958
*/
4959

4960
bool Create_file_log_event::write_base(IO_CACHE* file)
4961
{
4962 4963 4964 4965
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4966 4967 4968
  return res;
}

4969
#endif /* !MYSQL_CLIENT */
4970

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4971
/*
4972
  Create_file_log_event ctor
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4973
*/
4974

4975 4976 4977
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)
4978
{
4979 4980 4981 4982 4983
  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];
4984
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
4985 4986 4987 4988 4989 4990 4991
      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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    DBUG_VOID_RETURN;
4993
  if (description_event->binlog_version!=1)
4994
  {
4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011
    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);
5012 5013 5014 5015 5016 5017 5018 5019 5020
    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;
5021
  }
unknown's avatar
unknown committed
5022
  DBUG_VOID_RETURN;
5023 5024
}

5025

unknown's avatar
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5026
/*
5027
  Create_file_log_event::print()
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5028
*/
5029 5030

#ifdef MYSQL_CLIENT
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5031
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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5032
				  bool enable_local)
unknown's avatar
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5033
{
5034 5035
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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5036
  if (print_event_info->short_form)
5037 5038
  {
    if (enable_local && check_fname_outside_temp_buf())
unknown's avatar
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5039
      Load_log_event::print(file, print_event_info);
5040
    return;
5041 5042 5043 5044
  }

  if (enable_local)
  {
unknown's avatar
unknown committed
5045
    Load_log_event::print(file, print_event_info,
5046
			  !check_fname_outside_temp_buf());
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5047 5048 5049 5050
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
5051
    my_b_printf(&cache, "#"); 
5052 5053
  }

5054
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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5055
}
5056

unknown's avatar
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5057

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5058
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5059
{
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5060
  print(file, print_event_info, 0);
5061
}
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5062
#endif /* MYSQL_CLIENT */
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5063

5064

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5065
/*
5066
  Create_file_log_event::pack_info()
unknown's avatar
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5067
*/
5068

unknown's avatar
SCRUM  
unknown committed
5069
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5070
void Create_file_log_event::pack_info(Protocol *protocol)
5071
{
5072 5073 5074
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
unknown's avatar
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5075
  pos= strmov(pos + db_len, ";table=");
5076
  memcpy(pos, table_name, table_name_len);
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5077
  pos= strmov(pos + table_name_len, ";file_id=");
5078 5079 5080
  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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5081
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
5082
}
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5083
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5084 5085


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5086
/*
5087
  Create_file_log_event::do_apply_event()
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5088
*/
5089

unknown's avatar
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5090
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5091
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
5092
{
unknown's avatar
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5093 5094
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
5095 5096 5097
  int fd = -1;
  IO_CACHE file;
  int error = 1;
unknown's avatar
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5098

5099
  bzero((char*)&file, sizeof(file));
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5100 5101
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
5102
  thd->proc_info= proc_info;
5103 5104 5105 5106
  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 ||
5107 5108 5109
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5110 5111 5112
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
5113 5114 5115 5116
    goto err;
  }
  
  // a trick to avoid allocating another buffer
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5117 5118
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
5119 5120
  if (write_base(&file))
  {
unknown's avatar
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5121
    strmov(ext, ".info"); // to have it right in the error message
5122 5123 5124
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
5125 5126 5127 5128 5129 5130
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
5131 5132 5133 5134
  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)
5135
  {
5136 5137 5138
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
5139 5140
    goto err;
  }
5141
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5142
  {
5143 5144 5145
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
5146 5147
    goto err;
  }
5148 5149
  error=0;					// Everything is ok

5150 5151 5152 5153 5154
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
unknown's avatar
unknown committed
5155
  thd->proc_info= 0;
5156
  return error == 0;
5157
}
unknown's avatar
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5158
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5159

5160

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5161
/**************************************************************************
unknown's avatar
unknown committed
5162
	Append_block_log_event methods
unknown's avatar
unknown committed
5163
**************************************************************************/
5164

unknown's avatar
unknown committed
5165
/*
5166
  Append_block_log_event ctor
unknown's avatar
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5167
*/
5168 5169

#ifndef MYSQL_CLIENT  
5170 5171 5172
Append_block_log_event::Append_block_log_event(THD *thd_arg,
                                               const char *db_arg,
					       char *block_arg,
unknown's avatar
unknown committed
5173 5174 5175
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
unknown's avatar
unknown committed
5176
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
5177 5178
{
}
unknown's avatar
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5179
#endif
5180 5181


unknown's avatar
unknown committed
5182
/*
5183
  Append_block_log_event ctor
unknown's avatar
unknown committed
5184
*/
5185

5186 5187 5188
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)
5189
{
5190 5191 5192 5193 5194 5195
  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
5196
    DBUG_VOID_RETURN;
5197 5198 5199
  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
5200
  DBUG_VOID_RETURN;
5201 5202 5203
}


unknown's avatar
unknown committed
5204
/*
5205
  Append_block_log_event::write()
unknown's avatar
unknown committed
5206
*/
5207

5208
#ifndef MYSQL_CLIENT
5209
bool Append_block_log_event::write(IO_CACHE* file)
5210
{
5211
  uchar buf[APPEND_BLOCK_HEADER_LEN];
5212
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
5213 5214
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
5215
	  my_b_safe_write(file, (uchar*) block, block_len));
5216
}
5217
#endif
5218 5219


unknown's avatar
unknown committed
5220
/*
5221
  Append_block_log_event::print()
unknown's avatar
unknown committed
5222
*/
5223 5224

#ifdef MYSQL_CLIENT  
unknown's avatar
unknown committed
5225
void Append_block_log_event::print(FILE* file,
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5226
				   PRINT_EVENT_INFO* print_event_info)
5227
{
5228 5229
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5230
  if (print_event_info->short_form)
5231
    return;
5232 5233 5234
  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);
5235
}
unknown's avatar
unknown committed
5236
#endif /* MYSQL_CLIENT */
5237 5238


unknown's avatar
unknown committed
5239
/*
5240
  Append_block_log_event::pack_info()
unknown's avatar
unknown committed
5241
*/
5242

unknown's avatar
SCRUM  
unknown committed
5243
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5244
void Append_block_log_event::pack_info(Protocol *protocol)
5245 5246 5247 5248 5249 5250
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
unknown's avatar
unknown committed
5251
  protocol->store(buf, length, &my_charset_bin);
5252 5253 5254
}


unknown's avatar
unknown committed
5255
/*
5256
  Append_block_log_event::get_create_or_append()
unknown's avatar
unknown committed
5257 5258
*/

5259
int Append_block_log_event::get_create_or_append() const
unknown's avatar
unknown committed
5260
{
5261
  return 0; /* append to the file, fail if not exists */
unknown's avatar
unknown committed
5262 5263
}

unknown's avatar
unknown committed
5264
/*
5265
  Append_block_log_event::do_apply_event()
unknown's avatar
unknown committed
5266
*/
5267

5268
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
5269
{
5270
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
5271
  int fd;
5272
  int error = 1;
5273
  DBUG_ENTER("Append_block_log_event::do_apply_event");
5274

unknown's avatar
unknown committed
5275 5276
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
5277
  thd->proc_info= proc_info;
5278 5279 5280 5281 5282 5283 5284
  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)
    {
5285 5286 5287
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
5288 5289 5290
      goto err;
    }
  }
5291 5292
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
5293
  {
5294 5295 5296
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
5297 5298
    goto err;
  }
5299
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5300
  {
5301 5302 5303
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
5304 5305 5306
    goto err;
  }
  error=0;
5307

5308 5309 5310
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
5311
  thd->proc_info= 0;
5312
  DBUG_RETURN(error);
5313
}
unknown's avatar
SCRUM  
unknown committed
5314
#endif
5315 5316


unknown's avatar
unknown committed
5317
/**************************************************************************
unknown's avatar
unknown committed
5318
	Delete_file_log_event methods
unknown's avatar
unknown committed
5319
**************************************************************************/
5320

unknown's avatar
unknown committed
5321
/*
5322
  Delete_file_log_event ctor
unknown's avatar
unknown committed
5323
*/
5324 5325

#ifndef MYSQL_CLIENT
unknown's avatar
unknown committed
5326 5327 5328
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)
5329 5330
{
}
unknown's avatar
unknown committed
5331
#endif
5332

unknown's avatar
unknown committed
5333
/*
5334
  Delete_file_log_event ctor
unknown's avatar
unknown committed
5335
*/
5336

5337 5338 5339
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)
5340
{
5341 5342 5343
  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))
5344
    return;
5345
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
5346 5347 5348
}


unknown's avatar
unknown committed
5349
/*
5350
  Delete_file_log_event::write()
unknown's avatar
unknown committed
5351
*/
5352

5353
#ifndef MYSQL_CLIENT
5354
bool Delete_file_log_event::write(IO_CACHE* file)
5355
{
5356
 uchar buf[DELETE_FILE_HEADER_LEN];
5357
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
5358 5359
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
5360
}
5361
#endif
5362 5363


unknown's avatar
unknown committed
5364
/*
5365
  Delete_file_log_event::print()
unknown's avatar
unknown committed
5366
*/
5367 5368

#ifdef MYSQL_CLIENT  
unknown's avatar
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5369
void Delete_file_log_event::print(FILE* file,
unknown's avatar
unknown committed
5370
				  PRINT_EVENT_INFO* print_event_info)
5371
{
5372 5373
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5374
  if (print_event_info->short_form)
5375
    return;
5376 5377
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
5378
}
unknown's avatar
unknown committed
5379
#endif /* MYSQL_CLIENT */
5380

unknown's avatar
unknown committed
5381
/*
5382
  Delete_file_log_event::pack_info()
unknown's avatar
unknown committed
5383
*/
5384

unknown's avatar
SCRUM  
unknown committed
5385
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5386
void Delete_file_log_event::pack_info(Protocol *protocol)
5387 5388 5389 5390
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5391
  protocol->store(buf, (int32) length, &my_charset_bin);
5392
}
unknown's avatar
SCRUM  
unknown committed
5393
#endif
5394

unknown's avatar
unknown committed
5395
/*
5396
  Delete_file_log_event::do_apply_event()
unknown's avatar
unknown committed
5397
*/
5398

unknown's avatar
SCRUM  
unknown committed
5399
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5400
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
5401 5402
{
  char fname[FN_REFLEN+10];
unknown's avatar
unknown committed
5403
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
5404
  (void) my_delete(fname, MYF(MY_WME));
unknown's avatar
unknown committed
5405
  strmov(ext, ".info");
5406
  (void) my_delete(fname, MYF(MY_WME));
5407
  return 0;
5408
}
unknown's avatar
unknown committed
5409
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5410 5411


unknown's avatar
unknown committed
5412
/**************************************************************************
unknown's avatar
unknown committed
5413
	Execute_load_log_event methods
unknown's avatar
unknown committed
5414
**************************************************************************/
5415

unknown's avatar
unknown committed
5416
/*
5417
  Execute_load_log_event ctor
unknown's avatar
unknown committed
5418
*/
5419 5420

#ifndef MYSQL_CLIENT  
5421 5422
Execute_load_log_event::Execute_load_log_event(THD *thd_arg,
                                               const char* db_arg,
unknown's avatar
unknown committed
5423 5424
					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
5425 5426
{
}
unknown's avatar
unknown committed
5427
#endif
5428 5429
  

unknown's avatar
unknown committed
5430
/*
5431
  Execute_load_log_event ctor
unknown's avatar
unknown committed
5432
*/
5433

5434 5435 5436
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)
5437
{
5438 5439 5440
  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))
5441
    return;
5442
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
5443 5444 5445
}


unknown's avatar
unknown committed
5446
/*
5447
  Execute_load_log_event::write()
unknown's avatar
unknown committed
5448
*/
5449

5450
#ifndef MYSQL_CLIENT
5451
bool Execute_load_log_event::write(IO_CACHE* file)
5452
{
5453
  uchar buf[EXEC_LOAD_HEADER_LEN];
5454
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
5455 5456
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
5457
}
5458
#endif
5459 5460


unknown's avatar
unknown committed
5461
/*
5462
  Execute_load_log_event::print()
unknown's avatar
unknown committed
5463
*/
5464 5465

#ifdef MYSQL_CLIENT  
unknown's avatar
unknown committed
5466
void Execute_load_log_event::print(FILE* file,
unknown's avatar
unknown committed
5467
				   PRINT_EVENT_INFO* print_event_info)
5468
{
5469 5470
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
unknown committed
5471
  if (print_event_info->short_form)
5472
    return;
5473 5474 5475
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
5476
}
unknown's avatar
unknown committed
5477
#endif
5478

unknown's avatar
unknown committed
5479
/*
5480
  Execute_load_log_event::pack_info()
unknown's avatar
unknown committed
5481
*/
5482

unknown's avatar
SCRUM  
unknown committed
5483
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5484
void Execute_load_log_event::pack_info(Protocol *protocol)
5485 5486 5487 5488
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5489
  protocol->store(buf, (int32) length, &my_charset_bin);
5490 5491 5492
}


unknown's avatar
unknown committed
5493
/*
5494
  Execute_load_log_event::do_apply_event()
unknown's avatar
unknown committed
5495
*/
unknown's avatar
SCRUM  
unknown committed
5496

5497
int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
5498 5499
{
  char fname[FN_REFLEN+10];
unknown's avatar
unknown committed
5500
  char *ext;
5501
  int fd;
unknown's avatar
unknown committed
5502
  int error= 1;
5503
  IO_CACHE file;
unknown's avatar
unknown committed
5504
  Load_log_event *lev= 0;
5505

unknown's avatar
unknown committed
5506
  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
5507 5508
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
5509 5510 5511
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5512 5513 5514
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
5515 5516
    goto err;
  }
5517
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
5518 5519
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
5520
      lev->get_type_code() != NEW_LOAD_EVENT)
5521
  {
5522
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
5523
                    "file '%s' appears corrupted", fname);
5524 5525
    goto err;
  }
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5526

5527
  lev->thd = thd;
5528
  /*
5529
    lev->do_apply_event should use rli only for errors i.e. should
5530 5531
    not advance rli's position.

5532
    lev->do_apply_event is the place where the table is loaded (it
5533
    calls mysql_load()).
5534
  */
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5535

5536
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
5537
  if (lev->do_apply_event(0,rli,1)) 
5538
  {
5539 5540 5541 5542 5543 5544 5545 5546
    /*
      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.
    */
5547
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
5548 5549
    if (tmp)
    {
5550
      rli->report(ERROR_LEVEL, rli->last_error().number,
5551
                  "%s. Failed executing load from '%s'", tmp, fname);
5552 5553
      my_free(tmp,MYF(0));
    }
5554 5555
    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;
  }
5566
  (void) my_delete(fname, MYF(MY_WME));
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  memcpy(ext, ".data", 6);
5568
  (void) my_delete(fname, MYF(MY_WME));
5569
  error = 0;
5570

5571 5572 5573
err:
  delete lev;
  if (fd >= 0)
5574
  {
5575
    my_close(fd, MYF(0));
5576 5577
    end_io_cache(&file);
  }
5578
  return error;
5579
}
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SCRUM  
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5580

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5581
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5582 5583


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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)
5609
int Begin_load_query_log_event::get_create_or_append() const
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{
5611
  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::
5636
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,
5643
                  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;
}


5680
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
5684
  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);
5688 5689
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
5691
#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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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)
{
5706 5707 5708
  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)
  {
5712
    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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5716
    if (dup_handling == LOAD_DUP_REPLACE)
5717 5718
      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
5719
    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
  {
5724
    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)
5729
    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;
5738
  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
5760
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;

5768 5769
  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
5770

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  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
5772

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  /* Replace filename and LOCAL keyword in query before executing it */
5774
  if (buf == NULL)
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  {
5776 5777
    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;
5784
  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:
5790
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
5793
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
5799
  p= strmake(p, STRING_WITH_LEN(" INTO"));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

5802
  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;

5807 5808 5809 5810 5811 5812
  /*
    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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5820
/**************************************************************************
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5821
	sql_ex_info methods
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**************************************************************************/
5823

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5824
/*
5825
  sql_ex_info::write_data()
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*/
5827

5828
bool sql_ex_info::write_data(IO_CACHE* file)
5829 5830 5831
{
  if (new_format())
  {
5832 5833 5834 5835 5836
    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) ||
5837
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
5838 5839 5840
  }
  else
  {
5841 5842 5843 5844
    /**
      @todo This is sensitive to field padding. We should write a
      char[7], not an old_sql_ex. /sven
    */
5845 5846 5847 5848 5849 5850 5851 5852
    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;
5853
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
5854 5855 5856 5857
  }
}


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5858
/*
5859
  sql_ex_info::init()
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5860
*/
5861

5862
char *sql_ex_info::init(char *buf, char *buf_end, bool use_new_format)
5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874
{
  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.
    */
5875 5876 5877 5878 5879 5880
    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))
5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906
      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;
}
5907 5908 5909 5910 5911 5912 5913 5914 5915 5916


/**************************************************************************
	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),
5917
    m_row_count(0),
5918 5919
    m_table(tbl_arg),
    m_table_id(tid),
5920
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
5921 5922
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0) 
#ifdef HAVE_REPLICATION
5923
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
5924
#endif
5925
{
5926 5927
  /*
    We allow a special form of dummy event when the table, and cols
5928
    are null and the table id is ~0UL.  This is a temporary
5929
    solution, to be able to terminate a started statement in the
5930
    binary log: the extraneous events will be removed in the future.
5931
   */
5932 5933
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5934 5935 5936 5937 5938

  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);
5939
  /* if bitmap_init fails, caught in is_valid() */
5940 5941
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
5942
                          m_width,
5943
                          false)))
5944 5945 5946
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
5947
    {
5948
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
5949 5950
      create_last_word_mask(&m_cols);
    }
5951
  }
5952
  else
5953 5954 5955 5956
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
5957 5958 5959 5960 5961 5962 5963 5964
}
#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),
5965
    m_row_count(0),
5966
#ifndef MYSQL_CLIENT
5967
    m_table(NULL),
5968 5969 5970
#endif
    m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
5971
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
5972
#endif
5973 5974 5975 5976 5977
{
  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
  {
5993
    m_table_id= (ulong) uint6korr(post_start);
5994 5995 5996 5997 5998
    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

5999 6000 6001
  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
6002
  uchar *ptr_after_width= (uchar*) ptr_width;
6003
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
6004
  m_width = net_field_length(&ptr_after_width);
6005 6006 6007 6008
  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,
6009
                          m_width,
6010 6011 6012 6013
                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
6014
    create_last_word_mask(&m_cols);
6015
    ptr_after_width+= (m_width + 7) / 8;
6016
    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
6017 6018 6019 6020 6021 6022 6023
  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
6024

6025 6026 6027 6028 6029 6030
  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));

6031
    /* if bitmap_init fails, caught in is_valid() */
6032 6033
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
6034
                            m_width,
6035 6036 6037 6038
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
6039
      create_last_word_mask(&m_cols_ai);
6040
      ptr_after_width+= (m_width + 7) / 8;
6041 6042
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
6043 6044 6045 6046 6047 6048 6049 6050 6051
    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

6052
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
6053

6054
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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6055
  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
6056
                     m_table_id, m_flags, m_width, (ulong) data_size));
6057

6058
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
6059 6060
  if (likely((bool)m_rows_buf))
  {
6061
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6062
    m_curr_row= m_rows_buf;
6063
#endif
6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078
    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().
6079
  my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
6080 6081
}

6082 6083 6084 6085
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

6086 6087
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104

  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; 
}


6105
#ifndef MYSQL_CLIENT
6106
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
6107 6108 6109 6110 6111 6112
{
  /*
    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
  */
6113
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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6114 6115
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
6116 6117 6118 6119 6120
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
6121
  DBUG_DUMP("row_data", row_data, min(length, 32));
6122
#endif
6123 6124

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
6125
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
6126 6127 6128
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
6129
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
6130
  {
6131
    size_t const block_size= 1024;
6132
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
6133
    my_ptrdiff_t const new_alloc= 
6134
        block_size * ((cur_size + length + block_size - 1) / block_size);
6135

6136
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
6137
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154
    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;
  }

6155
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
6156 6157
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
6158
  m_row_count++;
6159 6160 6161 6162 6163
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6164
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
6165
{
6166
  DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
6167
  int error= 0;
6168 6169

  /*
6170 6171 6172
    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
6173
    success.
6174
   */
6175
  if (m_table_id == ~0UL)
6176 6177 6178 6179 6180 6181 6182
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

6183
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6184
    close_thread_tables(thd);
6185 6186 6187
    thd->clear_error();
    DBUG_RETURN(0);
  }
6188 6189 6190

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
6191
    do_apply_event(). We still check here to prevent future coding
6192
    errors.
6193 6194 6195 6196
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
6197 6198 6199 6200
    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.
6201
  */
6202
  if (!thd->lock)
6203
  {
6204 6205
    bool need_reopen= 1; /* To execute the first lap of the loop below */

6206
    /*
6207
      lock_tables() reads the contents of thd->lex, so they must be
6208
      initialized. Contrary to in
6209
      Table_map_log_event::do_apply_event() we don't call
6210
      mysql_init_query() as that may reset the binlog format.
6211
    */
6212
    lex_start(thd);
6213

6214 6215 6216
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
6217 6218
      if (!need_reopen)
      {
6219
        if (thd->is_slave_error || thd->is_fatal_error)
6220 6221 6222 6223 6224 6225
        {
          /*
            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;
6226 6227 6228 6229 6230
          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());
6231 6232 6233 6234
          thd->is_fatal_error= 1;
        }
        else
        {
6235 6236 6237
          rli->report(ERROR_LEVEL, error,
                      "Error in %s event: when locking tables",
                      get_type_str());
6238
        }
6239
        const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6240 6241
        DBUG_RETURN(error);
      }
6242

6243
      /*
6244
        So we need to reopen the tables.
6245

6246 6247
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
6248

6249 6250 6251
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
6252

6253 6254
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
6255 6256
       */
      thd->binlog_flush_pending_rows_event(false);
6257 6258
      TABLE_LIST *tables= rli->tables_to_lock;
      close_tables_for_reopen(thd, &tables);
6259

6260 6261
      uint tables_count= rli->tables_to_lock_count;
      if ((error= open_tables(thd, &tables, &tables_count, 0)))
6262
      {
6263
        if (thd->is_slave_error || thd->is_fatal_error)
6264 6265 6266 6267 6268 6269
        {
          /*
            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;
6270 6271 6272 6273
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' on reopening tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"));
6274
          thd->is_slave_error= 1;
6275
        }
6276
        const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6277
        DBUG_RETURN(error);
6278
      }
6279
    }
6280 6281 6282 6283 6284 6285 6286 6287 6288 6289

    /*
      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.
    */

    {
6290
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
6291 6292 6293 6294 6295 6296
      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;
6297
          thd->is_slave_error= 1;
6298
          const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6299 6300 6301 6302 6303
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

6304
    /*
6305 6306
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
6307 6308 6309

      We also invalidate the query cache for all the tables, since
      they will now be changed.
6310 6311 6312 6313 6314 6315 6316

      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.
6317
     */
6318
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
6319
    {
6320
      const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
6321
    }
6322 6323 6324
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
6325 6326
  }

6327 6328
  TABLE* 
    table= 
6329
    m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
6330 6331 6332 6333 6334

  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
6335
      (this was set up by Table_map_log_event::do_apply_event()
6336
      which tested replicate-* rules).
6337
    */
6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364

    /*
      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));

6365 6366 6367 6368 6369 6370 6371 6372 6373
    /*
      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.
     */
6374
    const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
6375

6376 6377
     if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
      set_flags(COMPLETE_ROWS_F);
6378

6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394
    /* 
      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);
6395

6396 6397 6398
    // Do event specific preparations 
    
    error= do_before_row_operations(rli);
6399

6400
    // row processing loop
6401

6402 6403
    while (error == 0 && m_curr_row < m_rows_end)
    {
6404 6405 6406 6407
      /* 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;
6408 6409 6410

      error= do_exec_row(rli);

6411 6412 6413 6414 6415 6416
      table->in_use = old_thd;
      switch (error)
      {
      case 0:
	break;

6417
      /* Some recoverable errors */
6418
      case HA_ERR_RECORD_CHANGED:
6419 6420 6421 6422 6423
      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)));
6424 6425
        error= 0;
        break;
6426 6427

      default:
6428
	rli->report(ERROR_LEVEL, thd->net.last_errno,
6429 6430 6431
                    "Error in %s event: row application failed. %s",
                    get_type_str(),
                    thd->net.last_error ? thd->net.last_error : "");
6432
	thd->is_slave_error= 1;
6433 6434 6435
	break;
      }

6436 6437 6438 6439 6440 6441 6442
      /*
       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.
      */ 
   
6443 6444 6445 6446
      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));

6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458
      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

6459
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
6460
                    const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
6461
    error= do_after_row_operations(rli, error);
6462
    if (!cache_stmt)
6463 6464 6465 6466
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
6467
  } // if (table)
6468

6469
  /*
6470 6471
    We need to delay this clear until here bacause unpack_current_row() uses
    master-side table definitions stored in rli.
6472 6473
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
6474
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
6475

6476 6477
  if (error)
  {                     /* error has occured during the transaction */
6478
    rli->report(ERROR_LEVEL, thd->net.last_errno,
6479
                "Error in %s event: error during transaction execution "
6480
                "on table %s.%s. %s",
6481
                get_type_str(), table->s->db.str,
6482 6483
                table->s->table_name.str,
                thd->net.last_error ? thd->net.last_error : "");
6484

6485
    /*
6486 6487 6488 6489 6490 6491 6492 6493
      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
6494
      rollback at the caller along with sbr.
6495
    */
unknown's avatar
unknown committed
6496
    thd->reset_current_stmt_binlog_row_based();
6497
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, error);
6498
    thd->is_slave_error= 1;
6499 6500 6501
    DBUG_RETURN(error);
  }

6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523
  /*
    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
6524
      Relay_log_info::last_event_start_time and all its occurrences.
6525
    */
6526
    const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
6527 6528 6529 6530 6531
  }

  DBUG_RETURN(0);
}

6532
Log_event::enum_skip_reason
6533
Rows_log_event::do_shall_skip(Relay_log_info *rli)
6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545
{
  /*
    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);
}

6546
int
6547
Rows_log_event::do_update_pos(Relay_log_info *rli)
6548 6549 6550 6551 6552 6553 6554
{
  DBUG_ENTER("Rows_log_event::do_update_pos");
  int error= 0;

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

6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572
  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);
6573

6574 6575 6576 6577 6578 6579 6580 6581 6582 6583
    /*
      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);
6584

6585 6586 6587 6588 6589 6590 6591 6592 6593 6594
    /*
      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();
6596
    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);
6622
  }
6623
  else
6624
  {
6625
    rli->inc_event_relay_log_pos();
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  }

6628
  DBUG_RETURN(error);
6629
}
6630

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

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
6636
  uchar buf[ROWS_HEADER_LEN];	// No need to init the buffer
6637
  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));
6660

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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));
6663

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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

6685
#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" : "";
6691
  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

6722
/**************************************************************************
6723
	Table_map_log_event member functions and support functions
6724 6725
**************************************************************************/

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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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*/

/**
  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).
  
  @retval 0 Ok.

  TODO: We may want to consider changing the encoding of the information.
  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. 
*/
#if !defined(MYSQL_CLIENT)
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

6834
  /* If malloc fails, caught in is_valid() */
6835
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
6836
  {
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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
6890
    m_table(NULL),
6891
#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)
6897
{
6898
  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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6903
  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
6911
  DBUG_DUMP("event buffer", (uchar*) buf, event_len);
6912
#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);
6927
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= TM_FLAGS_OFFSET;
  }

6931
  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 */
6939
  uchar const *const ptr_dblen= (uchar const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
6941 6942

  /* Length of database name + counter + terminating null */
6943
  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
6945 6946

  /* Length of table name + counter + terminating null */
6947
  uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
6948 6949
  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
6950

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6951
  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),
6954
                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
6955

6956
  /* 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 */
6966 6967
    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);
6976
      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()
{
6994
  my_free(m_meta_memory, MYF(MY_ALLOW_ZERO_PTR));
6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009
  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)
7010
int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
7011
{
7012 7013 7014 7015
  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
7016
  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)))
7029
    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);
7040 7041 7042

  int error= 0;

7043 7044 7045
  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
7049
  {
7050 7051 7052 7053 7054
    /*
      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);
7057
    /*
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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.
7061
    */
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    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
7064
    {
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      thd->set_current_stmt_binlog_row_based();
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    }

    /*
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      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.
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    */
    uint count;
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    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)))
7090
    {
7091
      if (thd->is_slave_error || thd->is_fatal_error)
7092
      {
7093 7094 7095 7096 7097
        /*
          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;
7098 7099 7100 7101 7102
        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);
7103
        thd->is_slave_error= 1;
7104
      }
7105
      goto err;
7106 7107
    }

7108
    m_table= table_list->table;
7109 7110 7111 7112 7113 7114 7115

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

7116 7117 7118
    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
7119 7120 7121

      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
7122
      inside Relay_log_info::clear_tables_to_lock() by calling the
7123
      table_def destructor explicitly.
7124
    */
7125 7126
    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt, 
         m_field_metadata, m_field_metadata_size, m_null_bits);
7127
    table_list->m_tabledef_valid= TRUE;
7128 7129

    /*
7130
      We record in the slave's information that the table should be
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7131
      locked by linking the table into the list of tables to lock.
7132
    */
7133
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
7134 7135
    const_cast<Relay_log_info*>(rli)->tables_to_lock= table_list;
    const_cast<Relay_log_info*>(rli)->tables_to_lock_count++;
7136
    /* 'memory' is freed in clear_tables_to_lock */
7137 7138
  }

7139
  DBUG_RETURN(error);
7140

7141
err:
7142
  my_free(memory, MYF(MY_WME));
7143 7144
  DBUG_RETURN(error);
}
7145

7146
Log_event::enum_skip_reason
7147
Table_map_log_event::do_shall_skip(Relay_log_info *rli)
7148 7149 7150 7151 7152
{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
7153
  return continue_group(rli);
7154 7155
}

7156
int Table_map_log_event::do_update_pos(Relay_log_info *rli)
7157 7158 7159 7160 7161
{
  rli->inc_event_relay_log_pos();
  return 0;
}

7162 7163 7164 7165 7166
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
7167
  DBUG_ASSERT(m_table_id != ~0UL);
7168
  uchar buf[TABLE_MAP_HEADER_LEN];
7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187
  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);

7188 7189
  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
7190

7191 7192 7193
  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));
7194

7195 7196 7197 7198
  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
7199
  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
7200

7201
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
7202
          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
7203
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
7206 7207 7208 7209
          my_b_safe_write(file, m_coltype, m_colcnt) ||
          my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
          my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
          my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
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 }
#endif

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

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

7220
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
7221 7222 7223
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
7224
    size_t bytes= my_snprintf(buf, sizeof(buf),
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7225
                                 "table_id: %lu (%s.%s)",
7226
                              m_table_id, m_dbnam, m_tblnam);
7227 7228
    protocol->store(buf, bytes, &my_charset_bin);
}
7229 7230
#endif

7231 7232 7233 7234 7235 7236 7237 7238 7239

#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  if (!print_event_info->short_form)
  {
7240 7241 7242 7243 7244
    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);
7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278
  }
}
#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)
7279 7280
int 
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294 7295 7296 7297 7298
{
  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;
7299 7300 7301
  /* 
     Do not raise the error flag in case of hitting to an unique attribute
  */
7302
  m_table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
7303 7304 7305 7306 7307 7308
  /* 
     NDB specific: update from ndb master wrapped as Write_rows
  */
  /*
    so that the event should be applied to replace slave's row
  */
7309
  m_table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
7310 7311 7312 7313 7314
  /* 
     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.
  */
7315
  m_table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
7316 7317 7318 7319 7320
  /*
    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.
  */
7321
  m_table->file->ha_start_bulk_insert(0);
7322 7323 7324 7325 7326 7327 7328 7329 7330 7331 7332 7333 7334 7335 7336
  /*
    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).
  */
7337
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
7338 7339 7340
  return error;
}

7341 7342 7343
int 
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                              int error)
7344
{
7345
  int local_error= 0;
7346 7347
  m_table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
  m_table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
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  /*
    reseting the extra with 
    table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
    fires bug#27077
    todo: explain or fix
  */
7354
  if ((local_error= m_table->file->ha_end_bulk_insert()))
7355
  {
7356
    m_table->file->print_error(local_error, MYF(0));
7357 7358
  }
  return error? error : local_error;
7359 7360
}

7361
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374

/*
  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;
}

7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399
/**
   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;
}

7400 7401
/**
  Write the current row into event's table.
7402

7403 7404 7405 7406 7407
  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.
7408

7409 7410 7411 7412 7413
  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.
7414

7415 7416 7417 7418
  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.
7419

7420 7421 7422 7423 7424 7425 7426 7427 7428 7429 7430 7431 7432 7433 7434 7435
  @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
7436
Rows_log_event::write_row(const Relay_log_info *const rli,
7437
                          const bool overwrite)
7438
{
7439 7440
  DBUG_ENTER("write_row");
  DBUG_ASSERT(m_table != NULL && thd != NULL);
7441

7442
  TABLE *table= m_table;  // pointer to event's table
7443 7444 7445 7446
  int error;
  int keynum;
  auto_afree_ptr<char> key(NULL);

7447 7448 7449 7450 7451 7452 7453 7454 7455
  /* 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?

7456
#ifndef DBUG_OFF
7457
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7458 7459 7460 7461
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

7462 7463 7464 7465 7466 7467 7468 7469
  /* 
    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. 
   */

7470 7471
  while ((error= table->file->ha_write_row(table->record[0])))
  {
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7472 7473 7474 7475 7476
    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);
    }
7477 7478
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
7479
      DBUG_PRINT("info",("Can't locate duplicate key (get_dup_key returns %d)",keynum));
7480 7481 7482 7483 7484 7485
      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
      */
7486
      DBUG_RETURN(error);
7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498
    }

    /*
       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.
     */
7499
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
7500
    {
7501
      DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
7502
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
7503
      if (error)
7504
      {
7505
        DBUG_PRINT("info",("rnd_pos() returns error %d",error));
7506
        table->file->print_error(error, MYF(0));
7507
        DBUG_RETURN(error);
7508
      }
7509 7510 7511
    }
    else
    {
7512 7513
      DBUG_PRINT("info",("Locating offending record using index_read_idx()"));

7514 7515
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
7516
        DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
7517
        DBUG_RETURN(my_errno);
7518 7519 7520 7521 7522 7523
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
7524 7525
        {
          DBUG_PRINT("info",("Can't allocate key buffer"));
7526
          DBUG_RETURN(ENOMEM);
7527
        }
7528 7529
      }

7530 7531
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
               0);
7532 7533 7534 7535
      error= table->file->index_read_idx_map(table->record[1], keynum,
                                             (const uchar*)key.get(),
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT);
7536
      if (error)
7537
      {
7538
        DBUG_PRINT("info",("index_read_idx() returns error %d",error)); 
7539
        table->file->print_error(error, MYF(0));
7540
        DBUG_RETURN(error);
7541
      }
7542 7543 7544
    }

    /*
7545
       Now, record[1] should contain the offending row.  That
7546 7547
       will enable us to update it or, alternatively, delete it (so
       that we can insert the new row afterwards).
7548
     */
7549

7550 7551 7552
    /*
      If row is incomplete we will use the record found to fill 
      missing columns.  
7553
    */
7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564
    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
7565

7566
    /*
7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580 7581 7582 7583
       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())
    {
7584
      DBUG_PRINT("info",("Updating row using ha_update_row()"));
7585 7586
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
7587 7588 7589 7590 7591
      switch (error) {
                
      case HA_ERR_RECORD_IS_THE_SAME:
        DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
                           " ha_update_row()"));
7592
        error= 0;
7593 7594 7595 7596 7597 7598 7599 7600 7601
      
      case 0:
        break;
        
      default:    
        DBUG_PRINT("info",("ha_update_row() returns error %d",error));
        table->file->print_error(error, MYF(0));
      }
      
7602
      DBUG_RETURN(error);
7603 7604 7605
    }
    else
    {
7606
      DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
7607
      if ((error= table->file->ha_delete_row(table->record[1])))
7608
      {
7609
        DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
7610
        table->file->print_error(error, MYF(0));
7611
        DBUG_RETURN(error);
7612
      }
7613 7614 7615
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
7616

7617
  DBUG_RETURN(error);
7618 7619
}

7620 7621 7622
#endif

int 
7623
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
7624
{
7625 7626 7627 7628 7629 7630 7631
  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; 
7632
}
7633

7634 7635 7636 7637 7638
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
7639
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
7640 7641 7642 7643 7644 7645 7646 7647
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7648 7649 7650 7651 7652 7653
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
7654
{
7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666
  /*
    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.
   */

7667 7668 7669
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
  DBUG_DUMP("record[1]", table->record[1], table->s->reclength);

7670
  bool result= FALSE;
7671
  uchar saved_x[2], saved_filler[2];
7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683 7684

  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);
    }
  }

7685
  if (table->s->blob_fields + table->s->varchar_fields == 0)
7686 7687 7688 7689 7690
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

7691 7692 7693 7694
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
7695 7696 7697 7698 7699
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

7700 7701
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
7702
  {
7703
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
7704 7705 7706 7707
    {
      result= TRUE;
      goto record_compare_exit;
    }
7708
  }
7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723

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];
    }
7724
  }
7725 7726

  return result;
7727 7728
}

7729 7730
/**
  Locate the current row in event's table.
7731

7732 7733 7734 7735
  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.
7736

7737 7738 7739
  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.
7740

7741 7742 7743 7744 7745
  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. 
7746

7747 7748 7749 7750
  @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.
7751

7752 7753
  @note If the engine allows random access of the records, a combination of
  @c position() and @c rnd_pos() will be used. 
7754
 */
7755

7756
int Rows_log_event::find_row(const Relay_log_info *rli)
7757
{
7758
  DBUG_ENTER("Rows_log_event::find_row");
7759 7760

  DBUG_ASSERT(m_table && m_table->in_use != NULL);
7761

7762 7763
  TABLE *table= m_table;
  int error;
7764

7765
  /* unpack row - missing fields get default values */
7766

7767 7768 7769 7770 7771 7772
  // 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"));
7773
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7774
#endif
7775

7776 7777
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
7778 7779 7780 7781 7782 7783
  {
    /*
      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
7784
      the "cursor" (i.e., record[0] in this case) at the correct row.
7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795

      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);

7796
    */
7797
    DBUG_PRINT("info",("locating record using primary key (position)"));
7798
    int error= table->file->rnd_pos_by_record(table->record[0]);
7799 7800 7801 7802 7803
    if (error)
    {
      DBUG_PRINT("info",("rnd_pos returns error %d",error));
      table->file->print_error(error, MYF(0));
    }
7804
    DBUG_RETURN(error);
7805 7806
  }

7807
  // We can't use position() - try other methods.
7808 7809 7810 7811 7812
  
  /* 
    We need to retrieve all fields
    TODO: Move this out from this function to main loop 
   */
7813
  table->use_all_columns();
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7814

7815 7816 7817 7818 7819 7820
  /*
    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]);    

7821 7822
  if (table->s->keys > 0)
  {
7823 7824
    DBUG_PRINT("info",("locating record using primary key (index_read)"));

7825
    /* We have a key: search the table using the index */
7826
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
7827 7828 7829
    {
      DBUG_PRINT("info",("ha_index_init returns error %d",error));
      table->file->print_error(error, MYF(0));
7830
      DBUG_RETURN(error);
7831
    }
7832

7833 7834 7835 7836 7837 7838 7839 7840 7841
    /* 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.
     */
7842
#ifndef HAVE_purify
7843
    DBUG_DUMP("key data", m_key, table->key_info->key_length);
7844 7845
#endif

7846 7847 7848 7849 7850 7851
    /*
      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.
    */
7852 7853
    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
7854 7855 7856
    table->record[0][pos]= 0xFF;
    
    if ((error= table->file->index_read_map(table->record[0], m_key, 
7857
                                            HA_WHOLE_KEY,
7858
                                            HA_READ_KEY_EXACT)))
7859
    {
7860
      DBUG_PRINT("info",("no record matching the key found in the table"));
7861
      table->file->print_error(error, MYF(0));
7862
      table->file->ha_index_end();
7863 7864 7865
      DBUG_RETURN(error);
    }

7866 7867 7868 7869 7870
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7871 7872
    DBUG_PRINT("info",("found first matching record")); 
    DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7873
#endif
7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885 7886
    /*
      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.
7887
    */
7888
    if (table->key_info->flags & HA_NOSAME)
7889 7890
    {
      table->file->ha_index_end();
7891
      DBUG_RETURN(0);
7892
    }
7893

7894 7895
    /*
      In case key is not unique, we still have to iterate over records found
7896 7897
      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].
7898 7899 7900
     */ 
    DBUG_PRINT("info",("non-unique index, scanning it to find matching record")); 

7901
    while (record_compare(table))
7902
    {
7903 7904 7905 7906 7907
      /*
        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.
7908 7909 7910

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
7911
      */
7912 7913
      if (table->s->null_bytes > 0)
      {
7914
        table->record[0][table->s->null_bytes - 1]|=
7915 7916 7917
          256U - (1U << table->s->last_null_bit_pos);
      }

7918
      if ((error= table->file->index_next(table->record[0])))
7919
      {
7920 7921
        DBUG_PRINT("info",("no record matching the given row found"));
        table->file->print_error(error, MYF(0));
7922
        table->file->ha_index_end();
7923
        DBUG_RETURN(error);
7924 7925
      }
    }
7926 7927 7928 7929 7930

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
7931 7932 7933
  }
  else
  {
7934 7935
    DBUG_PRINT("info",("locating record using table scan (rnd_next)"));

7936
    int restart_count= 0; // Number of times scanning has restarted from top
7937 7938 7939

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
7940 7941 7942 7943 7944 7945
    {
      DBUG_PRINT("info",("error initializing table scan"
                         " (ha_rnd_init returns %d)",error));
      table->file->print_error(error, MYF(0));
      DBUG_RETURN(error);
    }
7946 7947

    /* Continue until we find the right record or have made a full loop */
7948 7949
    do
    {
7950
      error= table->file->rnd_next(table->record[0]);
7951

7952
      switch (error) {
7953

7954 7955
      case 0:
      case HA_ERR_RECORD_DELETED:
7956
        break;
7957 7958

      case HA_ERR_END_OF_FILE:
7959 7960 7961
        if (++restart_count < 2)
          table->file->ha_rnd_init(1);
        break;
7962 7963

      default:
7964 7965 7966
        DBUG_PRINT("info", ("Failed to get next record"
                            " (rnd_next returns %d)",error));
        table->file->print_error(error, MYF(0));
7967
        table->file->ha_rnd_end();
7968
        DBUG_RETURN(error);
7969 7970
      }
    }
7971
    while (restart_count < 2 && record_compare(table));
7972 7973 7974 7975 7976
    
    /* 
      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
     */
7977

7978 7979 7980
    /*
      Have to restart the scan to be able to fetch the next row.
    */
7981 7982
    if (restart_count == 2)
      DBUG_PRINT("info", ("Record not found"));
7983 7984
    else
      DBUG_DUMP("record found", table->record[0], table->s->reclength);
7985 7986
    table->file->ha_rnd_end();

7987
    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == HA_ERR_RECORD_DELETED || error == 0);
7988 7989 7990 7991 7992
    DBUG_RETURN(error);
  }

  DBUG_RETURN(0);
}
7993

7994 7995 7996 7997 7998 7999 8000 8001 8002 8003 8004 8005 8006 8007 8008 8009 8010 8011 8012 8013 8014 8015 8016 8017 8018 8019 8020 8021 8022
#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)

8023 8024 8025 8026 8027
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)
8028 8029
  {
    /*
8030
      We don't need to allocate any memory for m_key since it is not used.
8031 8032 8033 8034
    */
    return 0;
  }

8035
  if (m_table->s->keys > 0)
8036
  {
8037 8038 8039 8040
    // 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;
8041
  }
8042
  return 0;
8043 8044
}

8045 8046 8047
int 
Delete_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
8048 8049
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
8050 8051
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR));
8052
  m_key= NULL;
8053 8054 8055 8056

  return error;
}

8057
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8058
{
8059
  int error;
8060
  DBUG_ASSERT(m_table != NULL);
8061

8062
  if (!(error= find_row(rli))) 
8063 8064
  { 
    /*
8065
      Delete the record found, located in record[0]
8066
    */
8067
    error= m_table->file->ha_delete_row(m_table->record[0]);
8068
  }
8069 8070 8071 8072 8073 8074 8075 8076 8077
  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)
{
8078
  Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
8079 8080 8081 8082 8083 8084 8085 8086 8087 8088 8089 8090 8091
}
#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,
8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102 8103
                                             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,
8104 8105 8106
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
{
8107 8108 8109 8110 8111
  init(cols);
}

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
8112
  /* if bitmap_init fails, caught in is_valid() */
8113 8114
  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
8115
                          m_width,
8116 8117 8118 8119
                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
8120
    {
8121
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
8122 8123
      create_last_word_mask(&m_cols_ai);
    }
8124
  }
8125 8126 8127
}
#endif /* !defined(MYSQL_CLIENT) */

8128 8129 8130 8131 8132 8133 8134 8135 8136

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().
}


8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149 8150 8151
/*
  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)

8152 8153 8154 8155
int 
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if (m_table->s->keys > 0)
8156
  {
8157 8158 8159 8160
    // 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;
8161 8162
  }

8163
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
8164

8165
  return 0;
8166 8167
}

8168 8169 8170
int 
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
8171
{
8172 8173 8174
  /*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
8175
  m_key= NULL;
8176 8177 8178 8179

  return error;
}

8180
int 
8181
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8182
{
8183
  DBUG_ASSERT(m_table != NULL);
8184

8185 8186
  int error= find_row(rli); 
  if (error)
8187 8188 8189 8190 8191 8192 8193
  {
    /*
      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);
8194
    return error;
8195
  }
8196

8197
  /*
8198
    This is the situation after locating BI:
8199

8200 8201 8202
    ===|=== before image ====|=== after image ===|===
       ^                     ^
       m_curr_row            m_curr_row_end
8203

8204 8205 8206
    BI found in the table is stored in record[0]. We copy it to record[1]
    and unpack AI to record[0].
   */
8207

8208
  store_record(m_table,record[1]);
8209

8210 8211
  m_curr_row= m_curr_row_end;
  error= unpack_current_row(rli); // this also updates m_curr_row_end
8212

8213
  /*
8214
    Now we have the right row to update.  The old row (the one we're
8215
    looking for) is in record[1] and the new row is in record[0].
8216
  */
8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227
#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]);
8228 8229
  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 0;
8230 8231 8232

  return error;
}
8233

8234 8235 8236 8237 8238 8239
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
8240
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
8241 8242 8243
}
#endif

8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260

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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8261 8262
  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);
8287
  DBUG_ASSERT((size_t) m_incident <= sizeof(description)/sizeof(*description));
8288 8289 8290 8291 8292 8293 8294 8295 8296

  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));
}