log_event.cc 294 KB
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/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; version 2 of the License.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


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#ifdef MYSQL_CLIENT

#include "mysql_priv.h"

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

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

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


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

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static const char *HA_ERR(int i)
{
  switch (i) {
  case HA_ERR_KEY_NOT_FOUND: return "HA_ERR_KEY_NOT_FOUND";
  case HA_ERR_FOUND_DUPP_KEY: return "HA_ERR_FOUND_DUPP_KEY";
  case HA_ERR_RECORD_CHANGED: return "HA_ERR_RECORD_CHANGED";
  case HA_ERR_WRONG_INDEX: return "HA_ERR_WRONG_INDEX";
  case HA_ERR_CRASHED: return "HA_ERR_CRASHED";
  case HA_ERR_WRONG_IN_RECORD: return "HA_ERR_WRONG_IN_RECORD";
  case HA_ERR_OUT_OF_MEM: return "HA_ERR_OUT_OF_MEM";
  case HA_ERR_NOT_A_TABLE: return "HA_ERR_NOT_A_TABLE";
  case HA_ERR_WRONG_COMMAND: return "HA_ERR_WRONG_COMMAND";
  case HA_ERR_OLD_FILE: return "HA_ERR_OLD_FILE";
  case HA_ERR_NO_ACTIVE_RECORD: return "HA_ERR_NO_ACTIVE_RECORD";
  case HA_ERR_RECORD_DELETED: return "HA_ERR_RECORD_DELETED";
  case HA_ERR_RECORD_FILE_FULL: return "HA_ERR_RECORD_FILE_FULL";
  case HA_ERR_INDEX_FILE_FULL: return "HA_ERR_INDEX_FILE_FULL";
  case HA_ERR_END_OF_FILE: return "HA_ERR_END_OF_FILE";
  case HA_ERR_UNSUPPORTED: return "HA_ERR_UNSUPPORTED";
  case HA_ERR_TO_BIG_ROW: return "HA_ERR_TO_BIG_ROW";
  case HA_WRONG_CREATE_OPTION: return "HA_WRONG_CREATE_OPTION";
  case HA_ERR_FOUND_DUPP_UNIQUE: return "HA_ERR_FOUND_DUPP_UNIQUE";
  case HA_ERR_UNKNOWN_CHARSET: return "HA_ERR_UNKNOWN_CHARSET";
  case HA_ERR_WRONG_MRG_TABLE_DEF: return "HA_ERR_WRONG_MRG_TABLE_DEF";
  case HA_ERR_CRASHED_ON_REPAIR: return "HA_ERR_CRASHED_ON_REPAIR";
  case HA_ERR_CRASHED_ON_USAGE: return "HA_ERR_CRASHED_ON_USAGE";
  case HA_ERR_LOCK_WAIT_TIMEOUT: return "HA_ERR_LOCK_WAIT_TIMEOUT";
  case HA_ERR_LOCK_TABLE_FULL: return "HA_ERR_LOCK_TABLE_FULL";
  case HA_ERR_READ_ONLY_TRANSACTION: return "HA_ERR_READ_ONLY_TRANSACTION";
  case HA_ERR_LOCK_DEADLOCK: return "HA_ERR_LOCK_DEADLOCK";
  case HA_ERR_CANNOT_ADD_FOREIGN: return "HA_ERR_CANNOT_ADD_FOREIGN";
  case HA_ERR_NO_REFERENCED_ROW: return "HA_ERR_NO_REFERENCED_ROW";
  case HA_ERR_ROW_IS_REFERENCED: return "HA_ERR_ROW_IS_REFERENCED";
  case HA_ERR_NO_SAVEPOINT: return "HA_ERR_NO_SAVEPOINT";
  case HA_ERR_NON_UNIQUE_BLOCK_SIZE: return "HA_ERR_NON_UNIQUE_BLOCK_SIZE";
  case HA_ERR_NO_SUCH_TABLE: return "HA_ERR_NO_SUCH_TABLE";
  case HA_ERR_TABLE_EXIST: return "HA_ERR_TABLE_EXIST";
  case HA_ERR_NO_CONNECTION: return "HA_ERR_NO_CONNECTION";
  case HA_ERR_NULL_IN_SPATIAL: return "HA_ERR_NULL_IN_SPATIAL";
  case HA_ERR_TABLE_DEF_CHANGED: return "HA_ERR_TABLE_DEF_CHANGED";
  case HA_ERR_NO_PARTITION_FOUND: return "HA_ERR_NO_PARTITION_FOUND";
  case HA_ERR_RBR_LOGGING_FAILED: return "HA_ERR_RBR_LOGGING_FAILED";
  case HA_ERR_DROP_INDEX_FK: return "HA_ERR_DROP_INDEX_FK";
  case HA_ERR_FOREIGN_DUPLICATE_KEY: return "HA_ERR_FOREIGN_DUPLICATE_KEY";
  case HA_ERR_TABLE_NEEDS_UPGRADE: return "HA_ERR_TABLE_NEEDS_UPGRADE";
  case HA_ERR_TABLE_READONLY: return "HA_ERR_TABLE_READONLY";
  case HA_ERR_AUTOINC_READ_FAILED: return "HA_ERR_AUTOINC_READ_FAILED";
  case HA_ERR_AUTOINC_ERANGE: return "HA_ERR_AUTOINC_ERANGE";
  case HA_ERR_GENERIC: return "HA_ERR_GENERIC";
  case HA_ERR_RECORD_IS_THE_SAME: return "HA_ERR_RECORD_IS_THE_SAME";
  case HA_ERR_LOGGING_IMPOSSIBLE: return "HA_ERR_LOGGING_IMPOSSIBLE";
  case HA_ERR_CORRUPT_EVENT: return "HA_ERR_CORRUPT_EVENT";
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  case HA_ERR_ROWS_EVENT_APPLY : return "HA_ERR_ROWS_EVENT_APPLY";
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  }
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  return 0;
}

/**
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   Error reporting facility for Rows_log_event::do_apply_event

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

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

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

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

  DESCRIPTION

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

  typedef unsigned short flag_set;

  /*
    Constructor.

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

    DESCRIPTION

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

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

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

  /*
    Return a pointer to the internal IO_CACHE.

    SYNOPSIS
      operator&()

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

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

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

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

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/**
  Ignore error code specified on command line.
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*/
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inline int ignored_error_code(int err_code)
{
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#ifdef HAVE_NDB_BINLOG
  /*
    The following error codes are hard-coded and will always be ignored.
  */
  switch (err_code)
  {
  case ER_DB_CREATE_EXISTS:
  case ER_DB_DROP_EXISTS:
    return 1;
  default:
    /* Nothing to do */
    break;
  }
#endif
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  return ((err_code == ER_SLAVE_IGNORED_TABLE) ||
          (use_slave_mask && bitmap_is_set(&slave_error_mask, err_code)));
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}
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#endif
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/*
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  pretty_print_str()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static char *pretty_print_str(char *packet, const char *str, int len)
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{
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  const char *end= str + len;
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  char *pos= packet;
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  *pos++= '\'';
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  while (str < end)
  {
    char c;
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    switch ((c=*str++)) {
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    case '\n': *pos++= '\\'; *pos++= 'n'; break;
    case '\r': *pos++= '\\'; *pos++= 'r'; break;
    case '\\': *pos++= '\\'; *pos++= '\\'; break;
    case '\b': *pos++= '\\'; *pos++= 'b'; break;
    case '\t': *pos++= '\\'; *pos++= 't'; break;
    case '\'': *pos++= '\\'; *pos++= '\''; break;
    case 0   : *pos++= '\\'; *pos++= '0'; break;
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    default:
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      *pos++= c;
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      break;
    }
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  }
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  *pos++= '\'';
  return pos;
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}
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#endif /* !MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/**
  Creates a temporary name for load data infile:.
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  @param buf		      Store new filename here
  @param file_id	      File_id (part of file name)
  @param event_server_id     Event_id (part of file name)
  @param ext		      Extension for file name
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  @return
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    Pointer to start of extension
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*/
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static char *slave_load_file_stem(char *buf, uint file_id,
                                  int event_server_id, const char *ext)
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{
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  char *res;
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  fn_format(buf,PREFIX_SQL_LOAD,slave_load_tmpdir, "", MY_UNPACK_FILENAME);
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  to_unix_path(buf);

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

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

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

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


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

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

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#ifndef MYSQL_CLIENT

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

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

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

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

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

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

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


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

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

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

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


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


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

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

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

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

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

    log_pos= my_b_safe_tell(file)+data_written;
  }

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

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

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


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/**
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  This needn't be format-tolerant, because we only read
  LOG_EVENT_MINIMAL_HEADER_LEN (we just want to read the event's length).
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*/
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int Log_event::read_log_event(IO_CACHE* file, String* packet,
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			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
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  int result=0;
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  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
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  DBUG_ENTER("Log_event::read_log_event");
883

884
  if (log_lock)
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    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (uchar*) buf, sizeof(buf)))
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  {
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    /*
      If the read hits eof, we must report it as eof so the caller
      will know it can go into cond_wait to be woken up on the next
      update to the log.
    */
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    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
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      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
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    goto end;
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  }
900
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
901
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
903
  {
904
    DBUG_PRINT("error",("data_len: %ld", data_len));
905
    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
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	     LOG_READ_TOO_LARGE);
    goto end;
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  }
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  /* Append the log event header to packet */
  if (packet->append(buf, sizeof(buf)))
  {
    /* Failed to allocate packet */
    result= LOG_READ_MEM;
    goto end;
  }
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  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
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  if (data_len)
  {
920
    /* Append rest of event, read directly from file into packet */
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    if (packet->append(file, data_len))
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    {
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      /*
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        Fatal error occured when appending rest of the event
        to packet, possible failures:
	1. EOF occured when reading from file, it's really an error
           as data_len is >=0 there's supposed to be more bytes available.
           file->error will have been set to number of bytes left to read
        2. Read was interrupted, file->error would normally be set to -1
        3. Failed to allocate memory for packet, my_errno
           will be ENOMEM(file->error shuold be 0, but since the
           memory allocation occurs before the call to read it might
           be uninitialized)
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      */
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      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
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      /* Implicit goto end; */
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    }
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  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
944
  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
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#else
952
#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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#ifndef MYSQL_CLIENT
/**
  @note
959
    Allocates memory;  The caller is responsible for clean-up.
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*/
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
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                                     const Format_description_log_event
                                     *description_event)
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#else
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Log_event* Log_event::read_log_event(IO_CACHE* file,
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                                     const Format_description_log_event
                                     *description_event)
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#endif
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{
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  DBUG_ENTER("Log_event::read_log_event");
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  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
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984
  LOCK_MUTEX;
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  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
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  if (my_b_read(file, (uchar *) head, header_size))
987
  {
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    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
991
    /*
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      No error here; it could be that we are at the file's end. However
      if the next my_b_read() fails (below), it will be an error as we
      were able to read the first bytes.
995
    */
996
    DBUG_RETURN(0);
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  }
998
  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
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  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;
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#ifndef max_allowed_packet
  THD *thd=current_thd;
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  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
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#endif
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1007
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

1013
  if (data_len < header_size)
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  {
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    error = "Event too small";
    goto err;
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  }
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  // some events use the extra byte to null-terminate strings
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  if (!(buf = (char*) my_malloc(data_len+1, MYF(MY_WME))))
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  {
    error = "Out of memory";
    goto err;
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  }
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  buf[data_len] = 0;
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  memcpy(buf, head, header_size);
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  if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
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  if ((res= read_log_event(buf, data_len, &error, description_event)))
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    res->register_temp_buf(buf);
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1035
err:
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  UNLOCK_MUTEX;
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  if (!res)
1038
  {
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    DBUG_ASSERT(error != 0);
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    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
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		    error,data_len,head[EVENT_TYPE_OFFSET]);
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    my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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    /*
      The SQL slave thread will check if file->error<0 to know
      if there was an I/O error. Even if there is no "low-level" I/O errors
      with 'file', any of the high-level above errors is worrying
      enough to stop the SQL thread now ; as we are skipping the current event,
      going on with reading and successfully executing other events can
      only corrupt the slave's databases. So stop.
    */
    file->error= -1;
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  }
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  DBUG_RETURN(res);
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}

1057

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/**
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
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Log_event* Log_event::read_log_event(const char* buf, uint event_len,
				     const char **error,
                                     const Format_description_log_event *description_event)
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{
1067 1068
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
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  DBUG_ASSERT(description_event != 0);
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  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
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  DBUG_DUMP("data", (unsigned char*) buf, event_len);

1073
  /* Check the integrity */
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  if (event_len < EVENT_LEN_OFFSET ||
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      buf[EVENT_TYPE_OFFSET] >= ENUM_END_EVENT ||
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      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
1080
  }
1081

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

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

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

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

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

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    /* Pretty-print event common header if header is exactly 19 bytes */
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    if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
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    {
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      char emit_buf[256];               // Enough for storing one line
      my_b_printf(file, "# Position  Timestamp   Type   Master ID        "
                  "Size      Master Pos    Flags \n");
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      size_t const bytes_written=
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        my_snprintf(emit_buf, sizeof(emit_buf),
                    "# %8.8lx %02x %02x %02x %02x   %02x   "
                    "%02x %02x %02x %02x   %02x %02x %02x %02x   "
                    "%02x %02x %02x %02x   %02x %02x\n",
                    (unsigned long) hexdump_from,
                    ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], ptr[6],
                    ptr[7], ptr[8], ptr[9], ptr[10], ptr[11], ptr[12], ptr[13],
                    ptr[14], ptr[15], ptr[16], ptr[17], ptr[18]);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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      ptr += LOG_EVENT_MINIMAL_HEADER_LEN;
      hexdump_from += LOG_EVENT_MINIMAL_HEADER_LEN;
    }
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    /* Rest of event (without common header) */
    for (i= 0, c= char_string, h=hex_string;
	 i < size;
	 i++, ptr++)
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    {
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      my_snprintf(h, 4, "%02x ", *ptr);
      h += 3;
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      *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];
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        size_t const bytes_written=
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          my_snprintf(emit_buf, sizeof(emit_buf),
                      "# %8.8lx %-48.48s |%16s|\n",
                      (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                      hex_string, char_string);
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        DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
	my_b_write(file, (uchar*) emit_buf, bytes_written);
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	hex_string[0]= 0;
	char_string[0]= 0;
	c= char_string;
	h= hex_string;
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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];
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      size_t const bytes_written=
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        my_snprintf(emit_buf, sizeof(emit_buf),
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                    "# %8.8lx %-48.48s |%s|\n",
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                    (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                    hex_string, char_string);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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    }
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    /*
      need a # to prefix the rest of printouts for example those of
      Rows_log_event::print_helper().
    */
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    my_b_write(file, reinterpret_cast<const uchar*>("# "), 2);
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  }
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  DBUG_VOID_RETURN;
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}

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

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


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


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


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


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

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

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

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

        default:

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


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

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

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

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

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

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

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

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

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

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

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

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


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


size_t
Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td,
                                      PRINT_EVENT_INFO *print_event_info,
                                      MY_BITMAP *cols_bitmap,
                                      const uchar *value, const uchar *prefix)
{
  const uchar *value0= value;
  const uchar *null_bits= value;
  char typestr[64]= "";
  
  value+= (m_width + 7) / 8;
  
  my_b_printf(file, "%s", prefix);
  
  for (size_t i= 0; i < td->size(); i ++)
  {
    int is_null= (null_bits[i / 8] >> (i % 8))  & 0x01;

    if (bitmap_is_set(cols_bitmap, i) == 0)
      continue;
    
    if (is_null)
    {
      my_b_printf(file, "###   @%d=NULL", i + 1);
    }
    else
    {
      my_b_printf(file, "###   @%d=", i + 1);
      size_t size= log_event_print_value(file, value,
                                         td->type(i), td->field_metadata(i),
                                         typestr, sizeof(typestr));
      if (!size)
        return 0;

      value+= size;
    }

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

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


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

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

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

end:
  delete td;
}

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

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

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


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

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

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


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

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

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

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

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

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

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

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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
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      thd_arg           - thread handle
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      query_arg         - array of char representing the query
      query_length      - size of the  `query_arg' array
      using_trans       - there is a modified transactional table
      suppress_use      - suppress the generation of 'USE' statements
      killed_status_arg - an optional with default to THD::KILLED_NO_VALUE
                          if the value is different from the default, the arg
                          is set to the current thd->killed value.
                          A caller might need to masquerade thd->killed with
                          THD::NOT_KILLED.
  DESCRIPTION
  Creates an event for binlogging
  The value for local `killed_status' can be supplied by caller.
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*/
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Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
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				 ulong query_length, bool using_trans,
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				 bool suppress_use,
                                 THD::killed_state killed_status_arg)
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  :Log_event(thd_arg,
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             (thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F :
              0) |
             (suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0),
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	     using_trans),
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   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
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   db(thd_arg->db), q_len((uint32) query_length),
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   thread_id(thd_arg->thread_id),
   /* save the original thread id; we already know the server id */
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   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
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   auto_increment_offset(thd_arg->variables.auto_increment_offset),
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   lc_time_names_number(thd_arg->variables.lc_time_names->number),
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   charset_database_number(0),
   table_map_for_update((ulonglong)thd_arg->table_map_for_update)
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{
  time_t end_time;
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  if (killed_status_arg == THD::KILLED_NO_VALUE)
    killed_status_arg= thd_arg->killed;
  error_code=
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    (killed_status_arg == THD::NOT_KILLED) ?
    (thd_arg->is_error() ? thd_arg->main_da.sql_errno() : 0) :
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    ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ? 0 :
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     thd_arg->killed_errno());
2295
  
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  time(&end_time);
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  exec_time = (ulong) (end_time  - thd_arg->start_time);
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  /**
    @todo this means that if we have no catalog, then it is replicated
    as an existing catalog of length zero. is that safe? /sven
  */
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  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
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  /* status_vars_len is set just before writing the event */
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  db_len = (db) ? (uint32) strlen(db) : 0;
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  if (thd_arg->variables.collation_database != thd_arg->db_charset)
    charset_database_number= thd_arg->variables.collation_database->number;
  
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  /*
    If we don't use flags2 for anything else than options contained in
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    thd_arg->options, it would be more efficient to flags2=thd_arg->options
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    (OPTIONS_WRITTEN_TO_BIN_LOG would be used only at reading time).
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    But it's likely that we don't want to use 32 bits for 3 bits; in the future
    we will probably want to reclaim the 29 bits. So we need the &.
  */
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  flags2= (uint32) (thd_arg->options & OPTIONS_WRITTEN_TO_BIN_LOG);
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  DBUG_ASSERT(thd_arg->variables.character_set_client->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_connection->number < 256*256);
  DBUG_ASSERT(thd_arg->variables.collation_server->number < 256*256);
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  DBUG_ASSERT(thd_arg->variables.character_set_client->mbminlen == 1);
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  int2store(charset, thd_arg->variables.character_set_client->number);
  int2store(charset+2, thd_arg->variables.collation_connection->number);
  int2store(charset+4, thd_arg->variables.collation_server->number);
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  if (thd_arg->time_zone_used)
  {
    /*
      Note that our event becomes dependent on the Time_zone object
      representing the time zone. Fortunately such objects are never deleted
      or changed during mysqld's lifetime.
    */
    time_zone_len= thd_arg->variables.time_zone->get_name()->length();
    time_zone_str= thd_arg->variables.time_zone->get_name()->ptr();
  }
  else
    time_zone_len= 0;
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  DBUG_PRINT("info",("Query_log_event has flags2: %lu  sql_mode: %lu",
                     (ulong) flags2, sql_mode));
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}
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#endif /* MYSQL_CLIENT */
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/* 2 utility functions for the next method */

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/**
   Read a string with length from memory.

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

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

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

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

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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";
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  case Q_TABLE_MAP_FOR_UPDATE_CODE: return "Q_TABLE_MAP_FOR_UPDATE_CODE";
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  }
  sprintf(buf, "CODE#%d", code);
  return buf;
}
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#endif
2419

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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)

2438

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/**
2440
  This is used by the SQL slave thread to prepare the event before execution.
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*/
2442
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),
   table_map_for_update(0)
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{
  ulong data_len;
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  uint32 tmp;
  uint8 common_header_len, post_header_len;
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  Log_event::Byte *start;
  const Log_event::Byte *end;
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  bool catalog_nz= 1;
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  DBUG_ENTER("Query_log_event::Query_log_event(char*,...)");

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

  /*
    5.0 format starts here.
    Depending on the format, we may or not have affected/warnings etc
    The remnent post-header to be parsed has length:
  */
  tmp= post_header_len - QUERY_HEADER_MINIMAL_LEN; 
  if (tmp)
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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))
      {
2546
        DBUG_PRINT("info", ("query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
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      break;
    case Q_AUTO_INCREMENT:
2552
      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:
    {
2567 2568
      if (get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len, end))
      {
2569
        DBUG_PRINT("info", ("Q_TIME_ZONE_CODE: query= 0"));
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        query= 0;
        DBUG_VOID_RETURN;
      }
2573 2574
      break;
    }
2575
    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
2576
      CHECK_SPACE(pos, end, 1);
2577 2578
      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;
2583
    case Q_LC_TIME_NAMES_CODE:
2584
      CHECK_SPACE(pos, end, 2);
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      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
2588
    case Q_CHARSET_DATABASE_CODE:
2589
      CHECK_SPACE(pos, end, 2);
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      charset_database_number= uint2korr(pos);
      pos+= 2;
      break;
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    case Q_TABLE_MAP_FOR_UPDATE_CODE:
      CHECK_SPACE(pos, end, 8);
      table_map_for_update= uint8korr(pos);
      pos+= 8;
      break;
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    default:
      /* That's why you must write status vars in growing order of code */
      DBUG_PRINT("info",("Query_log_event has unknown status vars (first has\
 code: %u), skipping the rest of them", (uint) *(pos-1)));
2602
      pos= (const uchar*) end;                         // Break loop
2603
    }
2604
  }
2605
  
2606
#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))))
2613
#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))))
2618
#endif
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      DBUG_VOID_RETURN;
2620
  if (catalog_len)                                  // If catalog is given
2621
  {
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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
    */
2627
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
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      copy_str_and_move(&catalog, &start, catalog_len);
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    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
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      catalog= (const char *)start;
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      start+= catalog_len+1;
    }
2635
  }
2636
  if (time_zone_len)
2637
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
2638

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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
  */

2646
  /* A 2nd variable part; this is common to all versions */ 
2647
  memcpy((char*) start, end, data_len);          // Copy db and query
2648
  start[data_len]= '\0';              // End query with \0 (For safetly)
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  db= (char *)start;
  query= (char *)(start + db_len + 1);
2651 2652
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

2655

2656
#ifdef MYSQL_CLIENT
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/**
  Query_log_event::print().

  @todo
    print the catalog ??
*/
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void Query_log_event::print_query_header(IO_CACHE* file,
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					 PRINT_EVENT_INFO* print_event_info)
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{
2666
  // 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)
2680
  {
2681
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)))
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      memcpy(print_event_info->db, db, db_len + 1);
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    if (db[0] && different_db) 
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      my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
2685
  }
2686

2687
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
2688
  end= strmov(end, print_event_info->delimiter);
2689
  *end++='\n';
2690
  my_b_write(file, (uchar*) buff, (uint) (end-buff));
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  if ((!print_event_info->thread_id_printed ||
       ((flags & LOG_EVENT_THREAD_SPECIFIC_F) &&
        thread_id != print_event_info->thread_id)))
  {
    // If --short-form, print deterministic value instead of pseudo_thread_id.
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    my_b_printf(file,"SET @@session.pseudo_thread_id=%lu%s\n",
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                short_form ? 999999999 : (ulong)thread_id,
                print_event_info->delimiter);
    print_event_info->thread_id= thread_id;
    print_event_info->thread_id_printed= 1;
  }
2702

2703
  /*
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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 ");
2724
      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
2725
                       "@@session.foreign_key_checks", &need_comma);
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      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
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                       "@@session.sql_auto_is_null", &need_comma);
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      print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
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                       "@@session.unique_checks", &need_comma);
      print_set_option(file, tmp, OPTION_NOT_AUTOCOMMIT, ~flags2,
                       "@@session.autocommit", &need_comma);
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      my_b_printf(file,"%s\n", print_event_info->delimiter);
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      print_event_info->flags2= flags2;
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    }
  }

  /*
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    Now the session variables;
    it's more efficient to pass SQL_MODE as a number instead of a
    comma-separated list.
    FOREIGN_KEY_CHECKS, SQL_AUTO_IS_NULL, UNIQUE_CHECKS are session-only
    variables (they have no global version; they're not listed in
    sql_class.h), The tests below work for pure binlogs or pure relay
    logs. Won't work for mixed relay logs but we don't create mixed
    relay logs (that is, there is no relay log with a format change
    except within the 3 first events, which mysqlbinlog handles
    gracefully). So this code should always be good.
2748 2749
  */

2750 2751 2752
  if (likely(sql_mode_inited) &&
      (unlikely(print_event_info->sql_mode != sql_mode ||
                !print_event_info->sql_mode_inited)))
2753
  {
2754 2755 2756 2757
    my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
                (ulong)sql_mode, print_event_info->delimiter);
    print_event_info->sql_mode= sql_mode;
    print_event_info->sql_mode_inited= 1;
2758
  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
2761
  {
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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;
2767 2768
  }

2769 2770
  /* TODO: print the catalog when we feature SET CATALOG */

2771 2772 2773
  if (likely(charset_inited) &&
      (unlikely(!print_event_info->charset_inited ||
                bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6))))
2774
  {
2775 2776
    CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
    if (cs_info)
2777
    {
2778 2779 2780
      /* for mysql client */
      my_b_printf(file, "/*!\\C %s */%s\n",
                  cs_info->csname, print_event_info->delimiter);
2781
    }
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792
    my_b_printf(file,"SET "
                "@@session.character_set_client=%d,"
                "@@session.collation_connection=%d,"
                "@@session.collation_server=%d"
                "%s\n",
                uint2korr(charset),
                uint2korr(charset+2),
                uint2korr(charset+4),
                print_event_info->delimiter);
    memcpy(print_event_info->charset, charset, 6);
    print_event_info->charset_inited= 1;
2793
  }
2794 2795
  if (time_zone_len)
  {
2796 2797
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
2798
    {
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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);
2802 2803
    }
  }
2804 2805
  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);
2808 2809
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
2810 2811 2812
  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);
2815
    else
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      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
2818 2819
    print_event_info->charset_database_number= charset_database_number;
  }
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}

2822

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void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
2825 2826 2827
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
2828
  my_b_write(&cache, (uchar*) query, q_len);
2829
  my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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}
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#endif /* MYSQL_CLIENT */
2832

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/*
2835
  Query_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2839

2840
int Query_log_event::do_apply_event(Relay_log_info const *rli)
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{
2842
  return do_apply_event(rli, query, q_len);
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}


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2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862
/**
  @todo
  Compare the values of "affected rows" around here. Something
  like:
  @code
     if ((uint32) affected_in_event != (uint32) affected_on_slave)
     {
     sql_print_error("Slave: did not get the expected number of affected \
     rows running query from master - expected %d, got %d (this numbers \
     should have matched modulo 4294967296).", 0, ...);
     thd->query_error = 1;
     }
  @endcode
  We may also want an option to tell the slave to ignore "affected"
  mismatch. This mismatch could be implemented with a new ER_ code, and
  to ignore it you would use --slave-skip-errors...
*/
2863
int Query_log_event::do_apply_event(Relay_log_info const *rli,
2864
                                      const char *query_arg, uint32 q_len_arg)
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{
2866
  LEX_STRING new_db;
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2867
  int expected_error,actual_error= 0;
2868
  /*
2869 2870 2871
    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
2872
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
2873
    you.
2874
  */
2875
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
2876 2877 2878
  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' */
2879 2880
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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2881

2882
  /*
2883 2884 2885 2886 2887 2888 2889 2890
    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.
2891
  */
2892
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
2893 2894
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

2895
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926
  if (strcmp("COMMIT", query) == 0 && rli->tables_to_lock)
  {
    /*
      Cleaning-up the last statement context:
      the terminal event of the current statement flagged with
      STMT_END_F got filtered out in ndb circular replication.
    */
    int error;
    char llbuff[22];
    if ((error= rows_event_stmt_cleanup(const_cast<Relay_log_info*>(rli), thd)))
    {
      const_cast<Relay_log_info*>(rli)->report(ERROR_LEVEL, error,
                  "Error in cleaning up after an event preceeding the commit; "
                  "the group log file/position: %s %s",
                  const_cast<Relay_log_info*>(rli)->group_master_log_name,
                  llstr(const_cast<Relay_log_info*>(rli)->group_master_log_pos,
                        llbuff));
    }
    /*
      Executing a part of rli->stmt_done() logics that does not deal
      with group position change. The part is redundant now but is 
      future-change-proof addon, e.g if COMMIT handling will start checking
      invariants like IN_STMT flag must be off at committing the transaction.
    */
    const_cast<Relay_log_info*>(rli)->inc_event_relay_log_pos();
    const_cast<Relay_log_info*>(rli)->clear_flag(Relay_log_info::IN_STMT);
  }
  else
  {
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
  }
2927

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2928 2929 2930 2931 2932 2933 2934
  /*
    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
2935
            ::do_apply_event(), then the companion SET also have so
2936
            we don't need to reset_one_shot_variables().
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2937
  */
2938
  if (rpl_filter->db_ok(thd->db))
2939 2940
  {
    thd->set_time((time_t)when);
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2941 2942
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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    VOID(pthread_mutex_lock(&LOCK_thread_count));
2944
    thd->query_id = next_query_id();
2945
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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2946
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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2947
    DBUG_PRINT("query",("%s",thd->query));
2948

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2949
    if (ignored_error_code((expected_error= error_code)) ||
2950
	!check_expected_error(thd,rli,expected_error))
2951 2952 2953
    {
      if (flags2_inited)
        /*
2954 2955
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
2956
        */
2957
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
2958 2959
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
2960 2961
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
2962 2963 2964 2965 2966
      */
      /*
        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
2967 2968 2969
        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).
2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987
      */
      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))))
          {
            /*
2988 2989 2990 2991
              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).
2992
            */
2993
            set_slave_thread_default_charset(thd, rli);
2994 2995 2996 2997 2998
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
2999 3000 3001
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
3002
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
3003 3004 3005 3006 3007 3008
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021
      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;
3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036
      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;
      
3037 3038
      thd->table_map_for_update= (table_map)table_map_for_update;
      
3039
      /* Execute the query (note that we bypass dispatch_command()) */
3040 3041
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
3042
      log_slow_statement(thd);
3043
    }
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3044 3045
    else
    {
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      /*
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3047 3048 3049 3050 3051
        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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3052
      */
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3053
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
3054
        clear_all_errors(thd, const_cast<Relay_log_info*>(rli)); /* Can ignore query */
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3055
      else
3056
      {
3057
        rli->report(ERROR_LEVEL, expected_error, 
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3058
                          "\
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3059
Query partially completed on the master (error on master: %d) \
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3060 3061 3062
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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3063
START SLAVE; . Query: '%s'", expected_error, thd->query);
3064
        thd->is_slave_error= 1;
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3065 3066 3067
      }
      goto end;
    }
3068

3069
    /* If the query was not ignored, it is printed to the general log */
3070
    if (!thd->is_error() || thd->main_da.sql_errno() != ER_SLAVE_IGNORED_TABLE)
3071
      general_log_write(thd, COM_QUERY, thd->query, thd->query_length);
3072

3073
compare_errors:
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3074 3075

     /*
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3076 3077 3078
      If we expected a non-zero error code, and we don't get the same error
      code, and none of them should be ignored.
    */
3079 3080 3081 3082
    actual_error= thd->is_error() ? thd->main_da.sql_errno() : 0;
    DBUG_PRINT("info",("expected_error: %d  sql_errno: %d",
 		       expected_error, actual_error));
    if ((expected_error != actual_error) &&
3083 3084 3085
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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3086
    {
3087
      rli->report(ERROR_LEVEL, 0,
3088 3089
                      "\
Query caused different errors on master and slave.     \
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3090
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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3091
Default database: '%s'. Query: '%s'",
3092 3093
                      ER_SAFE(expected_error),
                      expected_error,
3094
                      actual_error ? thd->main_da.message() : "no error",
3095 3096
                      actual_error,
                      print_slave_db_safe(db), query_arg);
3097
      thd->is_slave_error= 1;
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3098 3099 3100 3101 3102
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
3103
 	     ignored_error_code(actual_error))
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3104 3105
    {
      DBUG_PRINT("info",("error ignored"));
3106
      clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
3107
      thd->killed= THD::NOT_KILLED;
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    }
    /*
      Other cases: mostly we expected no error and get one.
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    */
3112
    else if (thd->is_slave_error || thd->is_fatal_error)
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3113
    {
3114
      rli->report(ERROR_LEVEL, actual_error,
3115
                      "Error '%s' on query. Default database: '%s'. Query: '%s'",
3116
                      (actual_error ? thd->main_da.message() :
3117 3118
                       "unexpected success or fatal error"),
                      print_slave_db_safe(thd->db), query_arg);
3119
      thd->is_slave_error= 1;
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3120
    }
3121 3122 3123 3124 3125 3126 3127 3128 3129

    /*
      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, ...);
3130
      thd->is_slave_error = 1;
3131 3132 3133 3134
      }
      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...
3135

3136 3137 3138 3139 3140 3141 3142
      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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3143 3144
  } /* End of if (db_ok(... */

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3145
end:
3146
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3147 3148 3149 3150 3151 3152
  /*
    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
3153 3154 3155
    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.
3156
  */
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  thd->catalog= 0;
3158
  thd->set_db(NULL, 0);                 /* will free the current database */
3159
  DBUG_PRINT("info", ("end: query= 0"));
3160
  thd->query= 0;			// just to be sure
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  thd->query_length= 0;
3162
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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  close_thread_tables(thd);      
3164 3165 3166 3167 3168 3169 3170 3171 3172 3173
  /*
    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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3174
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3175
  return thd->is_slave_error;
3176 3177
}

3178
int Query_log_event::do_update_pos(Relay_log_info *rli)
3179
{
3180
  /*
3181 3182 3183
    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.
3184
  */
3185 3186 3187 3188 3189 3190 3191
  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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3192
}
3193 3194


3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218
Log_event::enum_skip_reason
Query_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Query_log_event::do_shall_skip");
  DBUG_PRINT("debug", ("query: %s; q_len: %d", query, q_len));
  DBUG_ASSERT(query && q_len > 0);

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

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

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#endif
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/**************************************************************************
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	Start_log_event_v3 methods
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**************************************************************************/
3225

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

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/*
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  Start_log_event_v3::pack_info()
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*/
3238

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

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

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  if (!print_event_info->short_form)
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  {
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    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tStart: binlog v %d, server v %s created ",
                binlog_version, server_version);
    print_timestamp(&cache);
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    if (created)
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      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
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    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
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      my_b_printf(&cache, "# Warning: this binlog was not closed properly. "
                  "Most probably mysqld crashed writing it.\n");
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  }
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  if (!is_artificial_event() && created)
3278
  {
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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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  if (temp_buf &&
      print_event_info->base64_output_mode != BASE64_OUTPUT_NEVER &&
      !print_event_info->short_form)
  {
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    if (print_event_info->base64_output_mode != BASE64_OUTPUT_DECODE_ROWS)
      my_b_printf(&cache, "BINLOG '\n");
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    print_base64(&cache, print_event_info, FALSE);
    print_event_info->printed_fd_event= TRUE;
  }
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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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*/
3307

3308
Start_log_event_v3::Start_log_event_v3(const char* buf,
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                                       const Format_description_log_event
                                       *description_event)
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  :Log_event(buf, description_event)
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{
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  buf+= description_event->common_header_len;
  binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET);
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  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
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  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
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  created= uint4korr(buf+ST_CREATED_OFFSET);
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  dont_set_created= 1;
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}

3323

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/*
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  Start_log_event_v3::write()
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*/
3327

3328
#ifndef MYSQL_CLIENT
3329
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
3341

3342

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3344

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

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

3363
int Start_log_event_v3::do_apply_event(Relay_log_info const *rli)
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{
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  DBUG_ENTER("Start_log_event_v3::do_apply_event");
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  switch (binlog_version)
  {
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  case 3:
  case 4:
    /*
      This can either be 4.x (then a Start_log_event_v3 is only at master
      startup so we are sure the master has restarted and cleared his temp
      tables; the event always has 'created'>0) or 5.0 (then we have to test
      'created').
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    */
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    if (created)
    {
      close_temporary_tables(thd);
      cleanup_load_tmpdir();
    }
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    else
    {
      /*
        Set all temporary tables thread references to the current thread
        as they may point to the "old" SQL slave thread in case of its
        restart.
      */
      TABLE *table;
      for (table= thd->temporary_tables; table; table= table->next)
        table->in_use= thd;
    }
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    break;

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    /*
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       Now the older formats; in that case load_tmpdir is cleaned up by the I/O
       thread.
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    */
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  case 1:
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    if (strncmp(rli->relay_log.description_event_for_exec->server_version,
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                "3.23.57",7) >= 0 && created)
    {
      /*
        Can distinguish, based on the value of 'created': this event was
        generated at master startup.
      */
      close_temporary_tables(thd);
    }
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    /*
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      Otherwise, can't distinguish a Start_log_event generated at
      master startup and one generated by master FLUSH LOGS, so cannot
      be sure temp tables have to be dropped. So do nothing.
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    */
    break;
  default:
    /* this case is impossible */
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    DBUG_RETURN(1);
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  }
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  DBUG_RETURN(0);
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3421

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

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/**
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  Format_description_log_event 1st ctor.

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

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

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

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

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

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


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/**
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  The problem with this constructor is that the fixed header may have a
  length different from this version, but we don't know this length as we
  have not read the Format_description_log_event which says it, yet. This
  length is in the post-header of the event, but we don't know where the
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  post-header starts.
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  So this type of event HAS to:
  - either have the header's length at the beginning (in the header, at a
  fixed position which will never be changed), not in the post-header. That
  would make the header be "shifted" compared to other events.
  - or have a header of size LOG_EVENT_MINIMAL_HEADER_LEN (19), in all future
  versions, so that we know for sure.
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3591 3592 3593 3594 3595 3596 3597 3598 3599
  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*
3600
                             description_event)
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  :Start_log_event_v3(buf, description_event), event_type_permutation(0)
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{
  DBUG_ENTER("Format_description_log_event::Format_description_log_event(char*,...)");
  buf+= LOG_EVENT_MINIMAL_HEADER_LEN;
  if ((common_header_len=buf[ST_COMMON_HEADER_LEN_OFFSET]) < OLD_HEADER_LEN)
    DBUG_VOID_RETURN; /* sanity check */
  number_of_event_types=
    event_len-(LOG_EVENT_MINIMAL_HEADER_LEN+ST_COMMON_HEADER_LEN_OFFSET+1);
  DBUG_PRINT("info", ("common_header_len=%d number_of_event_types=%d",
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                      common_header_len, number_of_event_types));
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  /* If alloc fails, we'll detect it in is_valid() */
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  post_header_len= (uint8*) my_memdup((uchar*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
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                                      number_of_event_types*
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                                      sizeof(*post_header_len), MYF(0));
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  calc_server_version_split();
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  /*
    In some previous versions, the events were given other event type
    id numbers than in the present version. When replicating from such
    a version, we therefore set up an array that maps those id numbers
    to the id numbers of the present server.

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

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

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

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

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

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

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

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

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

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

3723
#ifndef MYSQL_CLIENT
3724 3725 3726 3727 3728 3729
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().
  */
3730
  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
3743

3744
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3745
int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
3746
{
3747
  DBUG_ENTER("Format_description_log_event::do_apply_event");
3748

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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).
  */
3761
  if (!is_artificial_event() && created && thd->transaction.all.ha_list)
3762
  {
3763
    /* 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
3774
    perform, we don't call Start_log_event_v3::do_apply_event()
3775
    (this was just to update the log's description event).
3776
  */
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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);
}

3793
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;
3816
  }
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  else
  {
    return Log_event::do_update_pos(rli);
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  }
}

3823
Log_event::enum_skip_reason
3824
Format_description_log_event::do_shall_skip(Relay_log_info *rli)
3825
{
3826
  return Log_event::EVENT_SKIP_NOT;
3827
}
3828

3829 3830
#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]));
}


3862
  /**************************************************************************
3863
        Load_log_event methods
3864
   General note about Load_log_event: the binlogging of LOAD DATA INFILE is
3865
   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).
  **************************************************************************/
3878

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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()
3885
{
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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)
3908
  {
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    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
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  pos= strmov(pos, "LOAD DATA ");
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  if (fn_start)
    *fn_start= pos;

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  if (check_fname_outside_temp_buf())
    pos= strmov(pos, "LOCAL ");
  pos= strmov(pos, "INFILE '");
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  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
3924

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

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

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

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  /* We have to create all optinal fields as the default is not empty */
3940
  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);
3946

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
3952 3953
  if (sql_ex.line_start_len)
  {
3954
    pos= strmov(pos, " STARTING BY ");
3955
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
3956
  }
3957

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  if ((long) skip_lines > 0)
3959 3960
  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
3962 3963
    pos= strmov(pos," LINES ");    
  }
3964 3965 3966 3967

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
3969
    pos= strmov(pos, " (");
3970 3971 3972
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
3977
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
3980
    }
3981
    *pos++= ')';
3982
  }
3983

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  *end= pos;
}


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

3992
  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));
3997
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
3999

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4001 4002
#ifndef MYSQL_CLIENT

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/*
4004
  Load_log_event::write_data_header()
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*/
4006

4007
bool Load_log_event::write_data_header(IO_CACHE* file)
4008
{
4009
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
4011 4012 4013 4014 4015
  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);
4016
  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
4017
}
4018

4019

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/*
4021
  Load_log_event::write_data_body()
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*/
4023

4024
bool Load_log_event::write_data_body(IO_CACHE* file)
4025
{
4026 4027 4028
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
4029
  {
4030 4031
    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
4032
      return 1;
4033
  }
4034 4035 4036
  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));
4037 4038
}

4039

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/*
4041
  Load_log_event::Load_log_event()
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*/
4043

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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,
4048
			       bool ignore, bool using_trans)
4049
  :Log_event(thd_arg,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
4051
             using_trans),
4052
   thread_id(thd_arg->thread_id),
4053
   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 : ""),
4057
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
4061
  exec_time = (ulong) (end_time  - thd_arg->start_time);
4062 4063 4064
  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
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  fname_len = (fname) ? (uint) strlen(fname) : 0;
  sql_ex.field_term = (char*) ex->field_term->ptr();
  sql_ex.field_term_len = (uint8) ex->field_term->length();
  sql_ex.enclosed = (char*) ex->enclosed->ptr();
  sql_ex.enclosed_len = (uint8) ex->enclosed->length();
  sql_ex.line_term = (char*) ex->line_term->ptr();
  sql_ex.line_term_len = (uint8) ex->line_term->length();
  sql_ex.line_start = (char*) ex->line_start->ptr();
  sql_ex.line_start_len = (uint8) ex->line_start->length();
  sql_ex.escaped = (char*) ex->escaped->ptr();
  sql_ex.escaped_len = (uint8) ex->escaped->length();
  sql_ex.opt_flags = 0;
  sql_ex.cached_new_format = -1;
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  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
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  if (ex->opt_enclosed)
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    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
4083

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  sql_ex.empty_flags= 0;
4085

4086
  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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  }
4094 4095
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
4096

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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;
4107
    
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  skip_lines = ex->skip_lines;
4109

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

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
4127

4128

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/**
  @note
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    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
4133
*/
4134 4135 4136 4137
Load_log_event::Load_log_event(const char *buf, uint event_len,
                               const Format_description_log_event *description_event)
  :Log_event(buf, description_event), num_fields(0), fields(0),
   field_lens(0),field_block_len(0),
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   table_name(0), db(0), fname(0), local_fname(FALSE)
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{
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  DBUG_ENTER("Load_log_event");
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  /*
    I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
    4.0->5.0 and 5.0->5.0 and it works.
  */
  if (event_len)
    copy_log_event(buf, event_len,
                   ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                    LOAD_HEADER_LEN + 
                    description_event->common_header_len :
                    LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
                   description_event);
  /* otherwise it's a derived class, will call copy_log_event() itself */
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  DBUG_VOID_RETURN;
4154 4155
}

4156

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4157
/*
4158
  Load_log_event::copy_log_event()
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4159
*/
4160

4161
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
4162 4163
                                   int body_offset,
                                   const Format_description_log_event *description_event)
4164
{
4165
  DBUG_ENTER("Load_log_event::copy_log_event");
4166
  uint data_len;
4167
  char* buf_end = (char*)buf + event_len;
4168 4169
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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4170
  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
4171 4172 4173 4174 4175
  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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4176
	  
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4177
  if ((int) event_len < body_offset)
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4178
    DBUG_RETURN(1);
4179 4180 4181 4182
  /*
    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.
  */
4183 4184 4185
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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4186
    DBUG_RETURN(1);
4187
  
4188
  data_len = event_len - body_offset;
4189
  if (num_fields > data_len) // simple sanity check against corruption
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4190
    DBUG_RETURN(1);
4191
  for (uint i = 0; i < num_fields; i++)
4192
    field_block_len += (uint)field_lens[i] + 1;
4193

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4194 4195 4196 4197
  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
4198
  fname_len = (uint) strlen(fname);
4199
  // null termination is accomplished by the caller doing buf[event_len]=0
4200

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4201
  DBUG_RETURN(0);
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4202 4203 4204
}


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4205
/*
4206
  Load_log_event::print()
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4207
*/
4208 4209

#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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4216
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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4217
			   bool commented)
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4218
{
4219 4220
  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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4222
  if (!print_event_info->short_form)
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4223
  {
4224 4225 4226
    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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4227 4228
  }

4229
  bool different_db= 1;
4230
  if (db)
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4231
  {
4232 4233 4234 4235 4236 4237
    /*
      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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4238
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
4239
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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4241
  }
4242
  
4243
  if (db && db[0] && different_db)
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4244
    my_b_printf(&cache, "%suse %s%s\n", 
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4245
            commented ? "# " : "",
4246
            db, print_event_info->delimiter);
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4247

4248
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
4250 4251
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
4252
  my_b_printf(&cache, "%sLOAD DATA ",
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4253
              commented ? "# " : "");
4254
  if (check_fname_outside_temp_buf())
4255 4256
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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4257

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4258
  if (sql_ex.opt_flags & REPLACE_FLAG)
4259
    my_b_printf(&cache," REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
4261
    my_b_printf(&cache," IGNORE ");
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4262
  
4263 4264 4265
  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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4266

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4267
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
4268 4269 4270
    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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4271
     
4272 4273
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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4274
     
4275 4276
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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4277

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4278

4279
  if (sql_ex.line_start)
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4280
  {
4281 4282
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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4283
  }
4284
  if ((long) skip_lines > 0)
4285
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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4286

4287 4288 4289 4290
  if (num_fields)
  {
    uint i;
    const char* field = fields;
4291
    my_b_printf(&cache, " (");
4292
    for (i = 0; i < num_fields; i++)
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4293
    {
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4294
      if (i)
4295 4296
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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4297
	  
4298
      field += field_lens[i]  + 1;
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4299
    }
4300
    my_b_printf(&cache, ")");
4301
  }
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4302

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4303
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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4304
  DBUG_VOID_RETURN;
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4305
}
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4306
#endif /* MYSQL_CLIENT */
4307

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4308
#ifndef MYSQL_CLIENT
4309

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4310
/**
4311
  Load_log_event::set_fields()
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4312

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4313 4314 4315 4316 4317
  @note
    This function can not use the member variable 
    for the database, since LOAD DATA INFILE on the slave
    can be for a different database than the current one.
    This is the reason for the affected_db argument to this method.
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4318
*/
4319

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4320
void Load_log_event::set_fields(const char* affected_db, 
4321 4322
				List<Item> &field_list,
                                Name_resolution_context *context)
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4323 4324
{
  uint i;
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4325
  const char* field = fields;
4326
  for (i= 0; i < num_fields; i++)
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4327
  {
4328 4329
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
4330
    field+= field_lens[i]  + 1;
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4331
  }
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4332
}
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4333
#endif /* !MYSQL_CLIENT */
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4334 4335


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SCRUM  
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4336
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360
/**
  Does the data loading job when executing a LOAD DATA on the slave.

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

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

  @retval
4361
    0           Success
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4362 4363
  @retval
    1           Failure
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4364
*/
4365

4366
int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli,
4367
                                   bool use_rli_only_for_errors)
4368
{
4369 4370 4371 4372
  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);
4373
  DBUG_ASSERT(thd->query == 0);
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4374
  thd->query_length= 0;                         // Should not be needed
4375
  thd->is_slave_error= 0;
4376
  clear_all_errors(thd, const_cast<Relay_log_info*>(rli));
4377

4378
  /* see Query_log_event::do_apply_event() and BUG#13360 */
4379
  DBUG_ASSERT(!rli->m_table_map.count());
4380
  /*
4381
    Usually lex_start() is called by mysql_parse(), but we need it here
4382 4383
    as the present method does not call mysql_parse().
  */
4384 4385 4386
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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4387
  if (!use_rli_only_for_errors)
4388
  {
4389 4390
    /*
      Saved for InnoDB, see comment in
4391
      Query_log_event::do_apply_event()
4392
    */
4393
    const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
4394
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
4395
  }
4396 4397
 
   /*
4398 4399 4400 4401 4402 4403 4404
    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
4405
    done by testing rules in Create_file_log_event::do_apply_event()
4406 4407 4408
    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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4409 4410 4411 4412 4413 4414 4415 4416


    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
4417
            ::do_apply_event(), then the companion SET also have so
4418
            we don't need to reset_one_shot_variables().
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4419
  */
4420
  if (rpl_filter->db_ok(thd->db))
4421
  {
4422 4423
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
4424
    thd->query_id = next_query_id();
4425
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
4426 4427 4428 4429 4430 4431
    /*
      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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4432
    mysql_reset_errors(thd, 0);
4433 4434 4435

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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4436
    tables.db= thd->strmake(thd->db, thd->db_length);
4437
    tables.alias = tables.table_name = (char*) table_name;
4438
    tables.lock_type = TL_WRITE;
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4439
    tables.updating= 1;
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4440

4441
    // the table will be opened in mysql_load    
4442
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
4443 4444 4445 4446 4447 4448 4449 4450
    {
      // 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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4451
      char *end;
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4452
      enum enum_duplicates handle_dup;
4453
      bool ignore= 0;
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4454 4455
      char *load_data_query;

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4456
      /*
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4457 4458
        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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4459
      */
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4460
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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4461
      {
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4462 4463 4464 4465 4466
        /*
          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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4467
      }
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4468 4469 4470 4471 4472 4473 4474

      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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4475
      if (sql_ex.opt_flags & REPLACE_FLAG)
4476
      {
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4477
	handle_dup= DUP_REPLACE;
4478
      }
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4479
      else if (sql_ex.opt_flags & IGNORE_FLAG)
4480 4481 4482 4483
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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4484
      else
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4485
      {
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4486
        /*
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4487
	  When replication is running fine, if it was DUP_ERROR on the
4488
          master then we could choose IGNORE here, because if DUP_ERROR
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4489
          suceeded on master, and data is identical on the master and slave,
4490
          then there should be no uniqueness errors on slave, so IGNORE is
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4491
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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4492 4493 4494
          (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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4495 4496

          If reading from net (a 3.23 master), mysql_load() will change this
4497
          to IGNORE.
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4498 4499
        */
        handle_dup= DUP_ERROR;
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4500
      }
4501 4502 4503 4504 4505 4506 4507 4508 4509 4510
      /*
        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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4511

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4512
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
4513 4514 4515 4516 4517
      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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4518 4519 4520 4521 4522
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
4523 4524 4525 4526 4527 4528

      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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4529
      List<Item> field_list;
4530 4531
      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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4532
      thd->variables.pseudo_thread_id= thread_id;
4533 4534 4535 4536 4537 4538 4539 4540 4541
      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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4542
      /*
4543
        It is safe to use tmp_list twice because we are not going to
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4544 4545
        update it inside mysql_load().
      */
4546 4547
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
4548
                     handle_dup, ignore, net != 0))
4549
        thd->is_slave_error= 1;
4550
      if (thd->cuted_fields)
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4551
      {
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4552
	/* log_pos is the position of the LOAD event in the master log */
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4553 4554 4555 4556 4557 4558 4559
        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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4560
      }
4561 4562 4563
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
4564 4565
  }
  else
4566 4567 4568 4569 4570 4571 4572 4573 4574
  {
    /*
      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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4575 4576

error:
4577
  thd->net.vio = 0; 
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4578
  const char *remember_db= thd->db;
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4579
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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4580
  thd->catalog= 0;
4581
  thd->set_db(NULL, 0);                   /* will free the current database */
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4582
  thd->query= 0;
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4583
  thd->query_length= 0;
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4584
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
4585
  close_thread_tables(thd);
4586 4587

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
4588
                  thd->is_slave_error= 0; thd->is_fatal_error= 1;);
4589

4590
  if (thd->is_slave_error)
4591
  {
4592
    /* this err/sql_errno code is copy-paste from net_send_error() */
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4593 4594
    const char *err;
    int sql_errno;
4595 4596 4597 4598 4599
    if (thd->is_error())
    {
      err= thd->main_da.message();
      sql_errno= thd->main_da.sql_errno();
    }
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4600 4601 4602 4603 4604
    else
    {
      sql_errno=ER_UNKNOWN_ERROR;
      err=ER(sql_errno);       
    }
4605
    rli->report(ERROR_LEVEL, sql_errno,"\
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4606
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
4607
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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4608
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4609 4610
    return 1;
  }
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4611
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
4612

4613
  if (thd->is_fatal_error)
4614
  {
4615 4616 4617 4618 4619 4620 4621 4622 4623
    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);
4624 4625 4626
    return 1;
  }

4627
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
4628
}
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4629
#endif
4630 4631


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4632
/**************************************************************************
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4633
  Rotate_log_event methods
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4634
**************************************************************************/
4635

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4636
/*
4637
  Rotate_log_event::pack_info()
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4638
*/
4639

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4640
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4641
void Rotate_log_event::pack_info(Protocol *protocol)
4642
{
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4643
  char buf1[256], buf[22];
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4644
  String tmp(buf1, sizeof(buf1), log_cs);
4645
  tmp.length(0);
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4646
  tmp.append(new_log_ident, ident_len);
4647
  tmp.append(STRING_WITH_LEN(";pos="));
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4648 4649
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
4650
}
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4651
#endif
4652

4653

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4654
/*
4655
  Rotate_log_event::print()
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4656
*/
4657 4658

#ifdef MYSQL_CLIENT
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4659
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4660
{
4661
  char buf[22];
4662 4663
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4664

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4665
  if (print_event_info->short_form)
4666
    return;
4667 4668
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
4669
  if (new_log_ident)
4670
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
4671
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
4672
}
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4673
#endif /* MYSQL_CLIENT */
4674 4675


4676

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4677
/*
4678
  Rotate_log_event::Rotate_log_event() (2 constructors)
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4679
*/
4680

4681 4682

#ifndef MYSQL_CLIENT
4683
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
4684 4685 4686 4687 4688 4689 4690 4691
                                   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];
4692
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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4693 4694
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
4695 4696
#endif
  if (flags & DUP_NAME)
4697
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
4698 4699
  if (flags & RELAY_LOG)
    set_relay_log_event();
4700 4701 4702 4703 4704
  DBUG_VOID_RETURN;
}
#endif


4705 4706
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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4707
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
4708
{
4709
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
4710
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
4711 4712
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
4713 4714
  uint ident_offset;
  if (event_len < header_size)
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4715
    DBUG_VOID_RETURN;
4716
  buf += header_size;
4717 4718 4719 4720
  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; 
4721
  set_if_smaller(ident_len,FN_REFLEN-1);
4722
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
4723
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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4724
  DBUG_VOID_RETURN;
4725
}
4726 4727


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4728
/*
4729
  Rotate_log_event::write()
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4730
*/
4731

4732
#ifndef MYSQL_CLIENT
4733
bool Rotate_log_event::write(IO_CACHE* file)
4734
{
4735
  char buf[ROTATE_HEADER_LEN];
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4736
  int8store(buf + R_POS_OFFSET, pos);
4737
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
4738 4739
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
4740
}
4741
#endif
4742

4743

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4744
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4745

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4746 4747
/*
  Got a rotate log event from the master.
4748

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4749 4750
  This is mainly used so that we can later figure out the logname and
  position for the master.
4751

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4752 4753 4754
  We can't rotate the slave's BINlog as this will cause infinitive rotations
  in a A -> B -> A setup.
  The NOTES below is a wrong comment which will disappear when 4.1 is merged.
4755

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4756
  @retval
4757
    0	ok
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4758
*/
4759
int Rotate_log_event::do_update_pos(Relay_log_info *rli)
4760
{
4761
  DBUG_ENTER("Rotate_log_event::do_update_pos");
4762 4763 4764 4765
#ifndef DBUG_OFF
  char buf[32];
#endif

4766 4767
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
4768 4769
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
4770

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4771
  /*
4772 4773 4774 4775
    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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4776 4777 4778 4779 4780
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
4781 4782 4783 4784

    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
4785
    relay log, which shall not change the group positions.
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4786
  */
4787
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
4788
      !is_relay_log_event() &&
4789
      !rli->is_in_group())
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4790
  {
4791
    pthread_mutex_lock(&rli->data_lock);
4792 4793 4794 4795
    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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4796 4797
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
4798
    rli->inc_group_relay_log_pos(pos, TRUE /* skip_lock */);
4799 4800
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
4801
                        rli->group_master_log_name,
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4802
                        (ulong) rli->group_master_log_pos));
4803 4804 4805
    pthread_mutex_unlock(&rli->data_lock);
    flush_relay_log_info(rli);
    
4806
    /*
4807 4808
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
4809 4810 4811 4812 4813
      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);
4814
    set_slave_thread_default_charset(thd, rli);
4815
    thd->variables.sql_mode= global_system_variables.sql_mode;
4816 4817
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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4818
  }
4819 4820 4821
  else
    rli->inc_event_relay_log_pos();

4822

4823
  DBUG_RETURN(0);
4824
}
4825

4826 4827

Log_event::enum_skip_reason
4828
Rotate_log_event::do_shall_skip(Relay_log_info *rli)
4829
{
4830
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
4831 4832

  switch (reason) {
4833
  case Log_event::EVENT_SKIP_NOT:
4834
  case Log_event::EVENT_SKIP_COUNT:
4835
    return Log_event::EVENT_SKIP_NOT;
4836

4837 4838
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
4839 4840
  }
  DBUG_ASSERT(0);
4841
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
4842 4843
}

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4844
#endif
4845 4846


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4847
/**************************************************************************
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4848
	Intvar_log_event methods
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4849
**************************************************************************/
4850

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4851
/*
4852
  Intvar_log_event::pack_info()
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4853
*/
4854

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4855
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4856
void Intvar_log_event::pack_info(Protocol *protocol)
4857
{
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4858 4859
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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4860
  *pos++= '=';
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4861
  pos= longlong10_to_str(val, pos, -10);
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4862
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4863
}
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4864
#endif
4865

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4866

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4867
/*
4868
  Intvar_log_event::Intvar_log_event()
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4869
*/
4870

4871 4872 4873
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
4874
{
4875 4876 4877
  /* The Post-Header is empty. The Varible Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[INTVAR_EVENT-1];
4878 4879
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
4880 4881
}

4882

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4883
/*
4884
  Intvar_log_event::get_var_type_name()
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4885
*/
4886 4887

const char* Intvar_log_event::get_var_type_name()
4888
{
4889 4890 4891 4892 4893
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
4894 4895
}

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4896

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4897
/*
4898
  Intvar_log_event::write()
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4899
*/
4900

4901
#ifndef MYSQL_CLIENT
4902
bool Intvar_log_event::write(IO_CACHE* file)
4903
{
4904 4905
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
4906
  int8store(buf + I_VAL_OFFSET, val);
4907 4908
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
4909
}
4910
#endif
4911

4912

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4913
/*
4914
  Intvar_log_event::print()
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4915
*/
4916 4917

#ifdef MYSQL_CLIENT
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4918
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4919
{
4920 4921 4922
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
4923 4924
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
4925

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4926
  if (!print_event_info->short_form)
4927
  {
4928 4929
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
4930
  }
4931

4932
  my_b_printf(&cache, "SET ");
4933 4934 4935 4936 4937 4938 4939
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
4940 4941 4942 4943
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
4944
  }
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4945 4946
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
4947
}
4948
#endif
4949

4950

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4951
/*
4952
  Intvar_log_event::do_apply_event()
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4953
*/
4954

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4955
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
4956
int Intvar_log_event::do_apply_event(Relay_log_info const *rli)
4957
{
4958 4959 4960 4961
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
4962
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
4963

4964 4965
  switch (type) {
  case LAST_INSERT_ID_EVENT:
4966 4967
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
4968 4969
    break;
  case INSERT_ID_EVENT:
4970
    thd->force_one_auto_inc_interval(val);
4971 4972
    break;
  }
4973 4974 4975
  return 0;
}

4976
int Intvar_log_event::do_update_pos(Relay_log_info *rli)
4977
{
4978
  rli->inc_event_relay_log_pos();
4979
  return 0;
4980
}
4981 4982 4983


Log_event::enum_skip_reason
4984
Intvar_log_event::do_shall_skip(Relay_log_info *rli)
4985 4986
{
  /*
4987 4988 4989 4990 4991 4992
    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.
4993
  */
4994
  return continue_group(rli);
4995 4996
}

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4997
#endif
4998

4999

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5000
/**************************************************************************
5001
  Rand_log_event methods
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5002
**************************************************************************/
5003

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5004
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5005
void Rand_log_event::pack_info(Protocol *protocol)
5006
{
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5007 5008 5009 5010 5011
  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);
5012
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
5013
}
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5014
#endif
5015 5016


5017 5018 5019
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
5020
{
5021 5022 5023
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[RAND_EVENT-1];
5024 5025
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
5026 5027
}

5028

5029
#ifndef MYSQL_CLIENT
5030
bool Rand_log_event::write(IO_CACHE* file)
5031
{
5032
  uchar buf[16];
5033 5034
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
5035 5036
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
5037
}
5038
#endif
5039

5040 5041

#ifdef MYSQL_CLIENT
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5042
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5043
{
5044 5045 5046
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5047
  char llbuff[22],llbuff2[22];
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5048
  if (!print_event_info->short_form)
5049
  {
5050 5051
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
5052
  }
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5053 5054 5055
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
5056
}
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5057
#endif /* MYSQL_CLIENT */
5058

5059

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5060
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5061
int Rand_log_event::do_apply_event(Relay_log_info const *rli)
5062
{
5063 5064 5065 5066
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5067
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5068

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5069 5070
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
5071 5072 5073
  return 0;
}

5074
int Rand_log_event::do_update_pos(Relay_log_info *rli)
5075
{
5076
  rli->inc_event_relay_log_pos();
5077 5078
  return 0;
}
5079

5080 5081

Log_event::enum_skip_reason
5082
Rand_log_event::do_shall_skip(Relay_log_info *rli)
5083 5084
{
  /*
5085 5086 5087 5088 5089 5090
    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.
5091
  */
5092
  return continue_group(rli);
5093 5094
}

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5095
#endif /* !MYSQL_CLIENT */
5096

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5097

5098 5099 5100 5101 5102 5103 5104
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
5105 5106
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
5107
  pos= longlong10_to_str(xid, pos, 10);
5108
  pos= strmov(pos, " */");
5109 5110 5111 5112
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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5113 5114 5115
/**
  @note
  It's ok not to use int8store here,
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5116
  as long as xid_t::set(ulonglong) and
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5117 5118
  xid_t::get_my_xid doesn't do it either.
  We don't care about actual values of xids as long as
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5119 5120
  identical numbers compare identically
*/
5121 5122 5123 5124

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
5125 5126
  :Log_event(buf, description_event)
{
5127 5128 5129
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[XID_EVENT-1];
5130
  memcpy((char*) &xid, buf, sizeof(xid));
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}


5134
#ifndef MYSQL_CLIENT
5135 5136
bool Xid_log_event::write(IO_CACHE* file)
{
5137
  DBUG_EXECUTE_IF("do_not_write_xid", return 0;);
5138
  return write_header(file, sizeof(xid)) ||
5139
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
5140
}
5141
#endif
5142 5143 5144


#ifdef MYSQL_CLIENT
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void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5146
{
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  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
5151
  {
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    char buf[64];
    longlong10_to_str(xid, buf, 10);

5155 5156
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
5157
  }
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  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
5159 5160 5161 5162 5163
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5164
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
5165
{
5166
  /* For a slave Xid_log_event is COMMIT */
5167 5168
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
5169
  return end_trans(thd, COMMIT);
5170
}
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Log_event::enum_skip_reason
Xid_log_event::do_shall_skip(Relay_log_info *rli)
{
  DBUG_ENTER("Xid_log_event::do_shall_skip");
  if (rli->slave_skip_counter > 0) {
    thd->options&= ~OPTION_BEGIN;
    DBUG_RETURN(Log_event::EVENT_SKIP_COUNT);
  }
  DBUG_RETURN(Log_event::do_shall_skip(rli));
}
5182 5183 5184
#endif /* !MYSQL_CLIENT */


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/**************************************************************************
5186
  User_var_log_event methods
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**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
5193
  uint val_offset= 4 + name_len;
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  uint event_len= val_offset;

  if (is_null)
  {
5198 5199
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
5209 5210 5211
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
5212 5213
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
5216 5217
      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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    case DECIMAL_RESULT:
    {
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      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
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      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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    case STRING_RESULT:
5234
      /* 15 is for 'COLLATE' and other chars */
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      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
5237
      CHARSET_INFO *cs;
5238 5239
      if (!buf)
        return;
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      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
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        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
5250 5251
        event_len= p-buf;
      }
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      break;
5253
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
5260
  buf[1]= '`';
5261
  memcpy(buf+2, name, name_len);
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  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
5264
  protocol->store(buf, event_len, &my_charset_bin);
5265
  my_free(buf, MYF(0));
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}
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#endif /* !MYSQL_CLIENT */
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User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
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{
5275 5276 5277
  /* The Post-Header is empty. The Variable Data part begins immediately. */
  buf+= description_event->common_header_len +
    description_event->post_header_len[USER_VAR_EVENT-1];
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  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
5280 5281
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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  if (is_null)
  {
    type= STRING_RESULT;
5285
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
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    type= (Item_result) buf[UV_VAL_IS_NULL];
    charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
    val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
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		       UV_CHARSET_NUMBER_SIZE);
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    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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  }
}


5301
#ifndef MYSQL_CLIENT
5302
bool User_var_log_event::write(IO_CACHE* file)
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{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
5307
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
5308
  uint buf1_length;
5309
  ulong event_length;
5310

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  int4store(buf, name_len);
5312 5313 5314 5315
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
5316
    val_len= 0;                                 // Length of 'pos'
5317 5318
  }    
  else
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  {
    buf1[1]= type;
    int4store(buf1 + 2, charset_number);

    switch (type) {
    case REAL_RESULT:
      float8store(buf2, *(double*) val);
      break;
    case INT_RESULT:
      int8store(buf2, *(longlong*) val);
      break;
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    case DECIMAL_RESULT:
    {
      my_decimal *dec= (my_decimal *)val;
      dec->fix_buffer_pointer();
      buf2[0]= (char)(dec->intg + dec->frac);
      buf2[1]= (char)dec->frac;
5336
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
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      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
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    case STRING_RESULT:
5341
      pos= (uchar*) val;
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      break;
5343
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return 0;
    }
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    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
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  }
5351 5352 5353 5354 5355

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

  return (write_header(file, event_length) ||
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          my_b_safe_write(file, (uchar*) buf, sizeof(buf))   ||
	  my_b_safe_write(file, (uchar*) name, name_len)     ||
	  my_b_safe_write(file, (uchar*) buf1, buf1_length) ||
	  my_b_safe_write(file, pos, val_len));
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}
5361
#endif
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5363

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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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{
5371 5372 5373
  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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  {
5376 5377
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

5380
  my_b_printf(&cache, "SET @`");
5381
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
5382
  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;
5393
      char real_buf[FMT_G_BUFSIZE(14)];
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      float8get(real_val, val);
5395 5396
      my_sprintf(real_buf, (real_buf, "%.14g", real_val));
      my_b_printf(&cache, ":=%s%s\n", real_buf, print_event_info->delimiter);
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      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
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      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
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      break;
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    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
5409 5410
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

5414
      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:
5421
    {
5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435
      /*
        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.
      */
5436 5437 5438 5439
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
5440
        break; // no error, as we are 'void'
5441
      str_to_hex(hex_str, val, val_len);
5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452
      /*
        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);
5454
      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);
5458
      my_afree(hex_str);
5459
    }
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      break;
5461
    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
5469

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/*
5472
  User_var_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5476
int User_var_log_event::do_apply_event(Relay_log_info const *rli)
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{
  Item *it= 0;
5479 5480 5481
  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;
5485 5486
  double real_val;
  longlong int_val;
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5488 5489 5490 5491
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
5492
  const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
5493

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
5503
      it= new Item_float(real_val, 0);
5504
      val= (char*) &real_val;		// Pointer to value in native format
5505
      val_len= 8;
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      break;
    case INT_RESULT:
5508 5509 5510
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
5511
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
5515
      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;
5524
    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);
5531 5532 5533
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
5534 5535 5536 5537

    Fix_fields() can fail, in which case a call of update_hash() might
    crash the server, so if fix fields fails, we just return with an
    error.
5538
  */
5539 5540 5541
  if (e.fix_fields(thd, 0))
    return 1;

5542 5543 5544 5545 5546
  /*
    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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5550 5551 5552
  return 0;
}

5553
int User_var_log_event::do_update_pos(Relay_log_info *rli)
5554
{
5555
  rli->inc_event_relay_log_pos();
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  return 0;
}
5558

5559
Log_event::enum_skip_reason
5560
User_var_log_event::do_shall_skip(Relay_log_info *rli)
5561 5562 5563 5564 5565 5566 5567 5568 5569
{
  /*
    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.
  */
5570
  return continue_group(rli);
5571
}
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#endif /* !MYSQL_CLIENT */
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/**************************************************************************
5576
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
5580
#ifdef MYSQL_CLIENT
5581
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
5582
{
5583 5584
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
5586
    return;
5587 5588
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
5589 5590
}
#endif  
5591

5592
#ifndef MYSQL_CLIENT
5593
void Slave_log_event::pack_info(Protocol *protocol)
5594
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
5596 5597 5598 5599 5600 5601 5602
  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);
5604
  protocol->store(buf, pos-buf, &my_charset_bin);
5605
}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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/**
  @todo
  re-write this better without holding both locks at the same time
*/
5614
Slave_log_event::Slave_log_event(THD* thd_arg,
5615
				 Relay_log_info* rli)
5616
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
5617 5618 5619 5620
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
5621

5622
  Master_info* mi = rli->mi;
5623 5624 5625 5626
  // 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);
5627
  master_log_len = strlen(rli->group_master_log_name);
5628 5629 5630
  // 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))))
5631
  {
5632 5633 5634
    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;
5635
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
5636
    master_port = mi->port;
5637
    master_pos = rli->group_master_log_pos;
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5638
    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
5639
			(ulong) master_pos));
5640
  }
5641 5642 5643 5644 5645 5646
  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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5647
#endif /* !MYSQL_CLIENT */
5648 5649 5650 5651 5652 5653 5654 5655 5656


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


#ifdef MYSQL_CLIENT
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5657
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5658
{
5659 5660
  Write_on_release_cache cache(&print_event_info->head_cache, file);

5661
  char llbuff[22];
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5662
  if (print_event_info->short_form)
5663
    return;
5664 5665
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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5666
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
5667 5668
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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5669
#endif /* MYSQL_CLIENT */
5670 5671 5672 5673 5674 5675 5676 5677


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


5678
#ifndef MYSQL_CLIENT
5679
bool Slave_log_event::write(IO_CACHE* file)
5680
{
5681
  ulong event_length= get_data_size();
5682 5683 5684
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
5685 5686

  return (write_header(file, event_length) ||
5687
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
5688
}
5689
#endif
5690 5691 5692 5693 5694 5695 5696


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;
5697
  master_host_len = (uint) strlen(master_host);
5698 5699 5700
  // safety
  master_log = master_host + master_host_len + 1;
  if (master_log > mem_pool + data_size)
5701
  {
5702 5703
    master_host = 0;
    return;
5704
  }
5705
  master_log_len = (uint) strlen(master_log);
5706
}
5707

5708

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5709
/** This code is not used, so has not been updated to be format-tolerant. */
5710 5711
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
5712
{
5713
  if (event_len < LOG_EVENT_HEADER_LEN)
5714
    return;
5715
  event_len -= LOG_EVENT_HEADER_LEN;
5716 5717 5718 5719 5720
  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);
5721 5722
}

5723

5724
#ifndef MYSQL_CLIENT
5725
int Slave_log_event::do_apply_event(Relay_log_info const *rli)
5726 5727 5728
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
5729
  return 0;
5730
}
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5731
#endif /* !MYSQL_CLIENT */
5732 5733


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5734
/**************************************************************************
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5735
	Stop_log_event methods
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5736
**************************************************************************/
5737

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5738
/*
5739
  Stop_log_event::print()
5740
*/
5741 5742

#ifdef MYSQL_CLIENT
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5743
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5744
{
5745 5746 5747
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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5748
  if (print_event_info->short_form)
5749 5750
    return;

5751 5752
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
5753
}
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5754
#endif /* MYSQL_CLIENT */
5755

5756

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5757
#ifndef MYSQL_CLIENT
5758
/*
5759 5760 5761 5762 5763 5764 5765
  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
5766
  Start_log_event_v3::do_apply_event(), not here. Because if we come
5767
  here, the master was sane.
5768
*/
5769
int Stop_log_event::do_update_pos(Relay_log_info *rli)
5770
{
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5771 5772
  /*
    We do not want to update master_log pos because we get a rotate event
5773
    before stop, so by now group_master_log_name is set to the next log.
5774
    If we updated it, we will have incorrect master coordinates and this
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5775
    could give false triggers in MASTER_POS_WAIT() that we have reached
5776
    the target position when in fact we have not.
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5777
  */
5778 5779 5780 5781 5782 5783 5784
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
5785 5786
  return 0;
}
5787

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5788
#endif /* !MYSQL_CLIENT */
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5789
#endif /* HAVE_REPLICATION */
5790

5791

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5792
/**************************************************************************
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5793
	Create_file_log_event methods
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5794
**************************************************************************/
5795 5796

/*
5797
  Create_file_log_event ctor
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5798
*/
5799 5800

#ifndef MYSQL_CLIENT
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5801 5802 5803 5804
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,
5805
                      bool ignore,
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5806
		      uchar* block_arg, uint block_len_arg, bool using_trans)
5807
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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5808
		  using_trans),
5809
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
5810
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
5811
{
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5812
  DBUG_ENTER("Create_file_log_event");
5813
  sql_ex.force_new_format();
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5814
  DBUG_VOID_RETURN;
5815
}
5816

5817

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5818
/*
5819
  Create_file_log_event::write_data_body()
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5820
*/
5821

5822
bool Create_file_log_event::write_data_body(IO_CACHE* file)
5823
{
5824 5825
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
5826
    return res;
5827 5828
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
5829 5830
}

5831

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5832
/*
5833
  Create_file_log_event::write_data_header()
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5834
*/
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5835

5836
bool Create_file_log_event::write_data_header(IO_CACHE* file)
5837
{
5838
  bool res;
5839
  uchar buf[CREATE_FILE_HEADER_LEN];
5840 5841
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
5842
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
5843
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
5844 5845 5846
}


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5847
/*
5848
  Create_file_log_event::write_base()
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5849
*/
5850

5851
bool Create_file_log_event::write_base(IO_CACHE* file)
5852
{
5853 5854 5855 5856
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
5857 5858 5859
  return res;
}

5860
#endif /* !MYSQL_CLIENT */
5861

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5862
/*
5863
  Create_file_log_event ctor
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5864
*/
5865

5866 5867 5868
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)
5869
{
5870 5871 5872 5873 5874
  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];
5875
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
5876 5877 5878 5879 5880 5881 5882
      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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5883
    DBUG_VOID_RETURN;
5884
  if (description_event->binlog_version!=1)
5885
  {
5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902
    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);
5903
    if (len < block_offset)
5904
      DBUG_VOID_RETURN;
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5905
    block = (uchar*)buf + block_offset;
5906 5907 5908 5909 5910 5911
    block_len = len - block_offset;
  }
  else
  {
    sql_ex.force_new_format();
    inited_from_old = 1;
5912
  }
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5913
  DBUG_VOID_RETURN;
5914 5915
}

5916

unknown's avatar
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5917
/*
5918
  Create_file_log_event::print()
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5919
*/
5920 5921

#ifdef MYSQL_CLIENT
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5922
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
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5923
				  bool enable_local)
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5924
{
5925 5926
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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5927
  if (print_event_info->short_form)
5928 5929
  {
    if (enable_local && check_fname_outside_temp_buf())
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5930
      Load_log_event::print(file, print_event_info);
5931
    return;
5932 5933 5934 5935
  }

  if (enable_local)
  {
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5936
    Load_log_event::print(file, print_event_info,
5937
			  !check_fname_outside_temp_buf());
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5938 5939 5940 5941
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
5942
    my_b_printf(&cache, "#"); 
5943 5944
  }

5945
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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5946
}
5947

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5948

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5949
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
5950
{
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5951
  print(file, print_event_info, 0);
5952
}
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5953
#endif /* MYSQL_CLIENT */
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5954

5955

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5956
/*
5957
  Create_file_log_event::pack_info()
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5958
*/
5959

unknown's avatar
SCRUM  
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5960
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5961
void Create_file_log_event::pack_info(Protocol *protocol)
5962
{
5963 5964 5965
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
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5966
  pos= strmov(pos + db_len, ";table=");
5967
  memcpy(pos, table_name, table_name_len);
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5968
  pos= strmov(pos + table_name_len, ";file_id=");
5969 5970 5971
  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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5972
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
5973
}
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5974
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5975 5976


5977
/**
5978
  Create_file_log_event::do_apply_event()
5979 5980 5981 5982 5983 5984 5985
  Constructor for Create_file_log_event to intantiate an event
  from the relay log on the slave.

  @retval
    0           Success
  @retval
    1           Failure
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5986
*/
5987

unknown's avatar
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5988
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5989
int Create_file_log_event::do_apply_event(Relay_log_info const *rli)
5990
{
unknown's avatar
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5991 5992
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
5993 5994 5995
  int fd = -1;
  IO_CACHE file;
  int error = 1;
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5996

5997
  bzero((char*)&file, sizeof(file));
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5998 5999
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
6000
  thd_proc_info(thd, proc_info);
6001 6002 6003 6004
  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 ||
6005 6006 6007
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6008 6009 6010
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6011 6012 6013 6014
    goto err;
  }
  
  // a trick to avoid allocating another buffer
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6015 6016
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
6017 6018
  if (write_base(&file))
  {
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6019
    strmov(ext, ".info"); // to have it right in the error message
6020 6021 6022
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
6023 6024 6025 6026 6027 6028
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
6029 6030 6031 6032
  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)
6033
  {
6034 6035 6036
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
6037 6038
    goto err;
  }
6039
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6040
  {
6041 6042 6043
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
6044 6045
    goto err;
  }
6046 6047
  error=0;					// Everything is ok

6048 6049 6050 6051 6052
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
6053
  thd_proc_info(thd, 0);
6054
  return error != 0;
6055
}
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6056
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6057

6058

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6059
/**************************************************************************
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6060
	Append_block_log_event methods
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6061
**************************************************************************/
6062

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6063
/*
6064
  Append_block_log_event ctor
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6065
*/
6066 6067

#ifndef MYSQL_CLIENT  
6068 6069
Append_block_log_event::Append_block_log_event(THD *thd_arg,
                                               const char *db_arg,
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6070
					       uchar *block_arg,
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6071 6072 6073
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
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6074
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
6075 6076
{
}
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6077
#endif
6078 6079


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6080
/*
6081
  Append_block_log_event ctor
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6082
*/
6083

6084 6085 6086
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)
6087
{
6088 6089 6090 6091 6092 6093
  DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
  uint8 common_header_len= description_event->common_header_len; 
  uint8 append_block_header_len=
    description_event->post_header_len[APPEND_BLOCK_EVENT-1];
  uint total_header_len= common_header_len+append_block_header_len;
  if (len < total_header_len)
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6094
    DBUG_VOID_RETURN;
6095
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
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6096
  block= (uchar*)buf + total_header_len;
6097
  block_len= len - total_header_len;
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6098
  DBUG_VOID_RETURN;
6099 6100 6101
}


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6102
/*
6103
  Append_block_log_event::write()
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6104
*/
6105

6106
#ifndef MYSQL_CLIENT
6107
bool Append_block_log_event::write(IO_CACHE* file)
6108
{
6109
  uchar buf[APPEND_BLOCK_HEADER_LEN];
6110
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
6111 6112
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
6113
	  my_b_safe_write(file, (uchar*) block, block_len));
6114
}
6115
#endif
6116 6117


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6118
/*
6119
  Append_block_log_event::print()
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6120
*/
6121 6122

#ifdef MYSQL_CLIENT  
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6123
void Append_block_log_event::print(FILE* file,
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6124
				   PRINT_EVENT_INFO* print_event_info)
6125
{
6126 6127
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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6128
  if (print_event_info->short_form)
6129
    return;
6130 6131 6132
  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);
6133
}
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#endif /* MYSQL_CLIENT */
6135 6136


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/*
6138
  Append_block_log_event::pack_info()
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6139
*/
6140

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6141
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6142
void Append_block_log_event::pack_info(Protocol *protocol)
6143 6144 6145 6146 6147 6148
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
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6149
  protocol->store(buf, length, &my_charset_bin);
6150 6151 6152
}


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6153
/*
6154
  Append_block_log_event::get_create_or_append()
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6155 6156
*/

6157
int Append_block_log_event::get_create_or_append() const
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6158
{
6159
  return 0; /* append to the file, fail if not exists */
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6160 6161
}

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6162
/*
6163
  Append_block_log_event::do_apply_event()
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6164
*/
6165

6166
int Append_block_log_event::do_apply_event(Relay_log_info const *rli)
6167
{
6168
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
6169
  int fd;
6170
  int error = 1;
6171
  DBUG_ENTER("Append_block_log_event::do_apply_event");
6172

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  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
6175
  thd_proc_info(thd, proc_info);
6176 6177 6178 6179 6180 6181 6182
  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)
    {
6183 6184 6185
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
6186 6187 6188
      goto err;
    }
  }
6189 6190
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
6191
  {
6192 6193 6194
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
6195 6196
    goto err;
  }
6197
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
6198
  {
6199 6200 6201
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
6202 6203 6204
    goto err;
  }
  error=0;
6205

6206 6207 6208
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
6209
  thd_proc_info(thd, 0);
6210
  DBUG_RETURN(error);
6211
}
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#endif
6213 6214


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

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6219
/*
6220
  Delete_file_log_event ctor
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6221
*/
6222 6223

#ifndef MYSQL_CLIENT
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Delete_file_log_event::Delete_file_log_event(THD *thd_arg, const char* db_arg,
					     bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
6227 6228
{
}
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#endif
6230

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/*
6232
  Delete_file_log_event ctor
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6233
*/
6234

6235 6236 6237
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)
6238
{
6239 6240 6241
  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))
6242
    return;
6243
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
6244 6245 6246
}


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6247
/*
6248
  Delete_file_log_event::write()
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6249
*/
6250

6251
#ifndef MYSQL_CLIENT
6252
bool Delete_file_log_event::write(IO_CACHE* file)
6253
{
6254
 uchar buf[DELETE_FILE_HEADER_LEN];
6255
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
6256 6257
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
6258
}
6259
#endif
6260 6261


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6262
/*
6263
  Delete_file_log_event::print()
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*/
6265 6266

#ifdef MYSQL_CLIENT  
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void Delete_file_log_event::print(FILE* file,
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				  PRINT_EVENT_INFO* print_event_info)
6269
{
6270 6271
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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  if (print_event_info->short_form)
6273
    return;
6274 6275
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
6276
}
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#endif /* MYSQL_CLIENT */
6278

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/*
6280
  Delete_file_log_event::pack_info()
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6281
*/
6282

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6283
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6284
void Delete_file_log_event::pack_info(Protocol *protocol)
6285 6286 6287 6288
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
6289
  protocol->store(buf, (int32) length, &my_charset_bin);
6290
}
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6291
#endif
6292

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6293
/*
6294
  Delete_file_log_event::do_apply_event()
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6295
*/
6296

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6297
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6298
int Delete_file_log_event::do_apply_event(Relay_log_info const *rli)
6299 6300
{
  char fname[FN_REFLEN+10];
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6301
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
6302
  (void) my_delete(fname, MYF(MY_WME));
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  strmov(ext, ".info");
6304
  (void) my_delete(fname, MYF(MY_WME));
6305
  return 0;
6306
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6308 6309


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6310
/**************************************************************************
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6311
	Execute_load_log_event methods
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**************************************************************************/
6313

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6314
/*
6315
  Execute_load_log_event ctor
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6316
*/
6317 6318

#ifndef MYSQL_CLIENT  
6319 6320
Execute_load_log_event::Execute_load_log_event(THD *thd_arg,
                                               const char* db_arg,
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					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
6323 6324
{
}
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#endif
6326 6327
  

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/*
6329
  Execute_load_log_event ctor
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6330
*/
6331

6332 6333 6334
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)
6335
{
6336 6337 6338
  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))
6339
    return;
6340
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
6341 6342 6343
}


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6344
/*
6345
  Execute_load_log_event::write()
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6346
*/
6347

6348
#ifndef MYSQL_CLIENT
6349
bool Execute_load_log_event::write(IO_CACHE* file)
6350
{
6351
  uchar buf[EXEC_LOAD_HEADER_LEN];
6352
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
6353 6354
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
6355
}
6356
#endif
6357 6358


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6359
/*
6360
  Execute_load_log_event::print()
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6361
*/
6362 6363

#ifdef MYSQL_CLIENT  
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void Execute_load_log_event::print(FILE* file,
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6365
				   PRINT_EVENT_INFO* print_event_info)
6366
{
6367 6368
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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6369
  if (print_event_info->short_form)
6370
    return;
6371 6372 6373
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
6374
}
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6375
#endif
6376

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6377
/*
6378
  Execute_load_log_event::pack_info()
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6379
*/
6380

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6381
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6382
void Execute_load_log_event::pack_info(Protocol *protocol)
6383 6384 6385 6386
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
6387
  protocol->store(buf, (int32) length, &my_charset_bin);
6388 6389 6390
}


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6391
/*
6392
  Execute_load_log_event::do_apply_event()
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6393
*/
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6394

6395
int Execute_load_log_event::do_apply_event(Relay_log_info const *rli)
6396 6397
{
  char fname[FN_REFLEN+10];
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6398
  char *ext;
6399
  int fd;
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  int error= 1;
6401
  IO_CACHE file;
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  Load_log_event *lev= 0;
6403

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  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
6405 6406
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
6407 6408 6409
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
6410 6411 6412
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
6413 6414
    goto err;
  }
6415
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
6416 6417
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
6418
      lev->get_type_code() != NEW_LOAD_EVENT)
6419
  {
6420
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
6421
                    "file '%s' appears corrupted", fname);
6422 6423
    goto err;
  }
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6424

6425
  lev->thd = thd;
6426
  /*
6427
    lev->do_apply_event should use rli only for errors i.e. should
6428 6429
    not advance rli's position.

6430
    lev->do_apply_event is the place where the table is loaded (it
6431
    calls mysql_load()).
6432
  */
unknown's avatar
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6433

6434
  const_cast<Relay_log_info*>(rli)->future_group_master_log_pos= log_pos;
6435
  if (lev->do_apply_event(0,rli,1)) 
6436
  {
6437 6438 6439 6440 6441 6442 6443 6444
    /*
      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.
    */
6445
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
6446 6447
    if (tmp)
    {
6448
      rli->report(ERROR_LEVEL, rli->last_error().number,
6449
                  "%s. Failed executing load from '%s'", tmp, fname);
6450 6451
      my_free(tmp,MYF(0));
    }
6452 6453
    goto err;
  }
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6454 6455 6456 6457 6458 6459 6460 6461 6462 6463
  /*
    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;
  }
6464
  (void) my_delete(fname, MYF(MY_WME));
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6465
  memcpy(ext, ".data", 6);
6466
  (void) my_delete(fname, MYF(MY_WME));
6467
  error = 0;
6468

6469 6470 6471
err:
  delete lev;
  if (fd >= 0)
6472
  {
6473
    my_close(fd, MYF(0));
6474 6475
    end_io_cache(&file);
  }
6476
  return error;
6477
}
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6479
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
6480 6481


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/**************************************************************************
	Begin_load_query_log_event methods
**************************************************************************/

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


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


#if defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6507
int Begin_load_query_log_event::get_create_or_append() const
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6508
{
6509
  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526
#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::
6534
Execute_load_query_log_event(THD *thd_arg, const char* query_arg,
6535 6536 6537 6538 6539
                             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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6540
  Query_log_event(thd_arg, query_arg, query_length_arg, using_trans,
6541
                  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;
}


6578
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
6582
  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);
6586 6587
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
6589
#endif
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#ifdef MYSQL_CLIENT
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info)
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{
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  print(file, print_event_info, 0);
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}

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/**
  Prints the query as LOAD DATA LOCAL and with rewritten filename.
*/
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info,
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                                         const char *local_fname)
{
6606 6607 6608
  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)
  {
6612
    my_b_write(&cache, (uchar*) query, fn_pos_start);
6613 6614 6615
    my_b_printf(&cache, " LOCAL INFILE \'");
    my_b_printf(&cache, local_fname);
    my_b_printf(&cache, "\'");
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    if (dup_handling == LOAD_DUP_REPLACE)
6617
      my_b_printf(&cache, " REPLACE");
6618
    my_b_printf(&cache, " INTO ");
6619
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
6620
    my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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  }
  else
  {
6624
    my_b_write(&cache, (uchar*) query, q_len);
6625
    my_b_printf(&cache, "\n%s\n", print_event_info->delimiter);
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  }

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  if (!print_event_info->short_form)
6629
    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;
6638
  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
6660
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;

6668 6669
  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
6670

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  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
6672

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  /* Replace filename and LOCAL keyword in query before executing it */
6674
  if (buf == NULL)
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  {
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    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), "Not enough memory");
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    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
6684
  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:
6690
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
6693
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
6699
  p= strmake(p, STRING_WITH_LEN(" INTO "));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

6702
  error= Query_log_event::do_apply_event(rli, buf, p-buf);
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  /* Forging file name for deletion in same buffer */
  *fname_end= 0;

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


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/**************************************************************************
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	sql_ex_info methods
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**************************************************************************/
6723

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/*
6725
  sql_ex_info::write_data()
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*/
6727

6728
bool sql_ex_info::write_data(IO_CACHE* file)
6729 6730 6731
{
  if (new_format())
  {
6732 6733 6734 6735 6736
    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) ||
6737
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
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  }
  else
  {
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    /**
      @todo This is sensitive to field padding. We should write a
      char[7], not an old_sql_ex. /sven
    */
6745 6746 6747 6748 6749 6750 6751 6752
    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;
6753
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
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  }
}


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/*
6759
  sql_ex_info::init()
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*/
6761

6762 6763
const char *sql_ex_info::init(const char *buf, const char *buf_end,
                              bool use_new_format)
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{
  cached_new_format = use_new_format;
  if (use_new_format)
  {
    empty_flags=0;
    /*
      The code below assumes that buf will not disappear from
      under our feet during the lifetime of the event. This assumption
      holds true in the slave thread if the log is in new format, but is not
      the case when we have old format because we will be reusing net buffer
      to read the actual file before we write out the Create_file event.
    */
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    if (read_str(&buf, buf_end, &field_term, &field_term_len) ||
        read_str(&buf, buf_end, &enclosed,   &enclosed_len) ||
        read_str(&buf, buf_end, &line_term,  &line_term_len) ||
        read_str(&buf, buf_end, &line_start, &line_start_len) ||
        read_str(&buf, buf_end, &escaped,    &escaped_len))
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      return 0;
    opt_flags = *buf++;
  }
  else
  {
    field_term_len= enclosed_len= line_term_len= line_start_len= escaped_len=1;
    field_term = buf++;			// Use first byte in string
    enclosed=	 buf++;
    line_term=   buf++;
    line_start=  buf++;
    escaped=     buf++;
    opt_flags =  *buf++;
    empty_flags= *buf++;
    if (empty_flags & FIELD_TERM_EMPTY)
      field_term_len=0;
    if (empty_flags & ENCLOSED_EMPTY)
      enclosed_len=0;
    if (empty_flags & LINE_TERM_EMPTY)
      line_term_len=0;
    if (empty_flags & LINE_START_EMPTY)
      line_start_len=0;
    if (empty_flags & ESCAPED_EMPTY)
      escaped_len=0;
  }
  return buf;
}
6807 6808 6809 6810 6811 6812 6813 6814 6815 6816


/**************************************************************************
	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),
6817
    m_row_count(0),
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    m_table(tbl_arg),
    m_table_id(tid),
6820
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
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    m_rows_buf(0), m_rows_cur(0), m_rows_end(0), m_flags(0) 
#ifdef HAVE_REPLICATION
6823
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
6824
#endif
6825
{
6826 6827
  /*
    We allow a special form of dummy event when the table, and cols
6828
    are null and the table id is ~0UL.  This is a temporary
6829
    solution, to be able to terminate a started statement in the
6830
    binary log: the extraneous events will be removed in the future.
6831
   */
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  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
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  if (thd_arg->options & OPTION_NO_FOREIGN_KEY_CHECKS)
      set_flags(NO_FOREIGN_KEY_CHECKS_F);
  if (thd_arg->options & OPTION_RELAXED_UNIQUE_CHECKS)
      set_flags(RELAXED_UNIQUE_CHECKS_F);
6839
  /* if bitmap_init fails, caught in is_valid() */
6840 6841
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
6842
                          m_width,
6843
                          false)))
6844 6845 6846
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
6847
    {
6848
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
6849 6850
      create_last_word_mask(&m_cols);
    }
6851
  }
6852
  else
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  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
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}
#endif

Rows_log_event::Rows_log_event(const char *buf, uint event_len,
                               Log_event_type event_type,
                               const Format_description_log_event
                               *description_event)
  : Log_event(buf, description_event),
6865
    m_row_count(0),
6866
#ifndef MYSQL_CLIENT
6867
    m_table(NULL),
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#endif
    m_table_id(0), m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6871
    , m_curr_row(NULL), m_curr_row_end(NULL), m_key(NULL)
6872
#endif
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{
  DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
  uint8 const common_header_len= description_event->common_header_len;
  uint8 const post_header_len= description_event->post_header_len[event_type-1];

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

  const char *post_start= buf + common_header_len;
  post_start+= RW_MAPID_OFFSET;
  if (post_header_len == 6)
  {
    /* Master is of an intermediate source tree before 5.1.4. Id is 4 bytes */
    m_table_id= uint4korr(post_start);
    post_start+= 4;
  }
  else
  {
6893
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= RW_FLAGS_OFFSET;
  }

  m_flags= uint2korr(post_start);

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  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
6902
  uchar *ptr_after_width= (uchar*) ptr_width;
6903
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
6904
  m_width = net_field_length(&ptr_after_width);
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  DBUG_PRINT("debug", ("m_width=%lu", m_width));
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
6909
                          m_width,
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                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
6914
    create_last_word_mask(&m_cols);
6915
    ptr_after_width+= (m_width + 7) / 8;
6916
    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
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  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
6924

6925 6926 6927 6928 6929 6930
  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));

6931
    /* if bitmap_init fails, caught in is_valid() */
6932 6933
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
6934
                            m_width,
6935 6936 6937 6938
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
6939
      create_last_word_mask(&m_cols_ai);
6940
      ptr_after_width+= (m_width + 7) / 8;
6941 6942
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
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    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

6952
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
6953

6954
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
6956
                     m_table_id, m_flags, m_width, (ulong) data_size));
6957

6958
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
6959 6960
  if (likely((bool)m_rows_buf))
  {
6961
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
6962
    m_curr_row= m_rows_buf;
6963
#endif
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    m_rows_end= m_rows_buf + data_size;
    m_rows_cur= m_rows_end;
    memcpy(m_rows_buf, ptr_rows_data, data_size);
  }
  else
    m_cols.bitmap= 0; // to not free it

  DBUG_VOID_RETURN;
}

Rows_log_event::~Rows_log_event()
{
  if (m_cols.bitmap == m_bitbuf) // no my_malloc happened
    m_cols.bitmap= 0; // so no my_free in bitmap_free
  bitmap_free(&m_cols); // To pair with bitmap_init().
6979
  my_free((uchar*)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
6980 6981
}

6982 6983 6984 6985
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

6986 6987
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
6988 6989 6990 6991 6992 6993 6994

  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);
6995
  data_size+= (uint) (end - buf);
6996 6997 6998 6999

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

7000
  data_size+= (uint) (m_rows_cur - m_rows_buf);
7001 7002 7003 7004
  return data_size; 
}


7005
#ifndef MYSQL_CLIENT
7006
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
7007 7008 7009 7010 7011 7012
{
  /*
    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
  */
7013
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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7014 7015
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
7016 7017 7018 7019 7020
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7021
  DBUG_DUMP("row_data", row_data, min(length, 32));
7022
#endif
7023 7024

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
7025
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
7026 7027 7028
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
7029
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
7030
  {
7031
    size_t const block_size= 1024;
7032
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
7033
    my_ptrdiff_t const new_alloc= 
7034
        block_size * ((cur_size + length + block_size - 1) / block_size);
7035

7036
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
7037
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
7038 7039 7040 7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054
    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;
  }

7055
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
7056 7057
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
7058
  m_row_count++;
7059 7060 7061 7062 7063
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7064
int Rows_log_event::do_apply_event(Relay_log_info const *rli)
7065
{
7066
  DBUG_ENTER("Rows_log_event::do_apply_event(Relay_log_info*)");
7067
  int error= 0;
7068
  /*
7069 7070 7071
    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
7072
    success.
7073
   */
7074
  if (m_table_id == ~0UL)
7075 7076 7077 7078 7079 7080 7081
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

7082
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7083
    close_thread_tables(thd);
7084 7085 7086
    thd->clear_error();
    DBUG_RETURN(0);
  }
7087 7088 7089

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
7090
    do_apply_event(). We still check here to prevent future coding
7091
    errors.
7092 7093 7094 7095
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
7096 7097 7098 7099
    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.
7100
  */
7101
  if (!thd->lock)
7102 7103
  {
    /*
7104 7105 7106 7107 7108 7109 7110
      Lock_tables() reads the contents of thd->lex, so they must be
      initialized.

      We also call the mysql_reset_thd_for_next_command(), since this
      is the logical start of the next "statement". Note that this
      call might reset the value of current_stmt_binlog_row_based, so
      we need to do any changes to that value after this function.
7111
    */
7112
    lex_start(thd);
7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125
    mysql_reset_thd_for_next_command(thd);

    /*
      Check if the slave is set to use SBR.  If so, it should switch
      to using RBR until the end of the "statement", i.e., next
      STMT_END_F or next error.
    */
    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
    {
      thd->set_current_stmt_binlog_row_based();
    }

7126

7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143
    /*
      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));

7144
    if (simple_open_n_lock_tables(thd, rli->tables_to_lock))
7145
    {
7146 7147
      uint actual_error= thd->main_da.sql_errno();
      if (thd->is_slave_error || thd->is_fatal_error)
7148
      {
7149 7150 7151 7152 7153 7154 7155 7156 7157
        /*
          Error reporting borrowed from Query_log_event with many excessive
          simplifications (we don't honour --slave-skip-errors)
        */
        rli->report(ERROR_LEVEL, actual_error,
                    "Error '%s' on opening tables",
                    (actual_error ? thd->main_da.message() :
                     "unexpected success or fatal error"));
        thd->is_slave_error= 1;
7158
      }
7159 7160
      const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
      DBUG_RETURN(actual_error);
7161
    }
7162 7163 7164 7165 7166 7167 7168 7169 7170 7171

    /*
      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.
    */

    {
7172
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
7173 7174 7175 7176 7177 7178
      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;
7179
          thd->is_slave_error= 1;
7180
          const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7181 7182 7183 7184 7185
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

7186
    /*
7187 7188
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
7189 7190 7191

      We also invalidate the query cache for all the tables, since
      they will now be changed.
7192 7193 7194 7195 7196 7197 7198

      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.
7199
     */
7200
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
7201
    {
7202
      const_cast<Relay_log_info*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
7203
    }
7204 7205 7206
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
7207 7208
  }

7209 7210
  TABLE* 
    table= 
7211
    m_table= const_cast<Relay_log_info*>(rli)->m_table_map.get_table(m_table_id);
7212

7213 7214
  DBUG_PRINT("debug", ("m_table: 0x%lx, m_table_id: %lu", (ulong) m_table, m_table_id));

7215 7216 7217 7218
  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
7219
      (this was set up by Table_map_log_event::do_apply_event()
7220
      which tested replicate-* rules).
7221
    */
7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232

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

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    /*
      Now we are in a statement and will stay in a statement until we
      see a STMT_END_F.

      We set this flag here, before actually applying any rows, in
      case the SQL thread is stopped and we need to detect that we're
      inside a statement and halting abruptly might cause problems
      when restarting.
     */
7242
    const_cast<Relay_log_info*>(rli)->set_flag(Relay_log_info::IN_STMT);
7243

7244 7245
     if ( m_width == table->s->fields && bitmap_is_set_all(&m_cols))
      set_flags(COMPLETE_ROWS_F);
7246

7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262
    /* 
      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);
7263

7264 7265
    this->slave_exec_mode= slave_exec_mode_options; // fix the mode

7266 7267
    // Do event specific preparations 
    error= do_before_row_operations(rli);
7268

7269
    // row processing loop
7270

7271 7272
    while (error == 0 && m_curr_row < m_rows_end)
    {
7273 7274 7275 7276
      /* 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;
7277 7278 7279

      error= do_exec_row(rli);

7280 7281 7282
      DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
      DBUG_ASSERT(error != HA_ERR_RECORD_DELETED);

7283 7284 7285 7286 7287
      table->in_use = old_thd;
      switch (error)
      {
      case 0:
	break;
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      /*
        The following list of "idempotent" errors
        means that an error from the list might happen
        because of idempotent (more than once) 
        applying of a binlog file.
        Notice, that binlog has a  ddl operation its
        second applying may cause

        case HA_ERR_TABLE_DEF_CHANGED:
        case HA_ERR_CANNOT_ADD_FOREIGN:
7298

7299
        which are not included into to the list.
7300 7301 7302

        Note that HA_ERR_RECORD_DELETED is not in the list since
        do_exec_row() should not return that error code.
7303
      */
7304
      case HA_ERR_RECORD_CHANGED:
7305 7306
      case HA_ERR_KEY_NOT_FOUND:
      case HA_ERR_END_OF_FILE:
7307 7308 7309 7310 7311 7312 7313 7314 7315 7316 7317 7318 7319 7320
      case HA_ERR_FOUND_DUPP_KEY:
      case HA_ERR_FOUND_DUPP_UNIQUE:
      case HA_ERR_FOREIGN_DUPLICATE_KEY:
      case HA_ERR_NO_REFERENCED_ROW:
      case HA_ERR_ROW_IS_REFERENCED:

        if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1)
        {
          if (global_system_variables.log_warnings)
            slave_rows_error_report(WARNING_LEVEL, error, rli, thd, table,
                                    get_type_str(),
                                    RPL_LOG_NAME, (ulong) log_pos);
          error= 0;
        }
7321
        break;
7322
        
7323
      default:
7324
	thd->is_slave_error= 1;
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	break;
      }

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

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      if (!m_curr_row_end && !error)
        unpack_current_row(rli);
  
      // at this moment m_curr_row_end should be set
      DBUG_ASSERT(error || m_curr_row_end != NULL); 
      DBUG_ASSERT(error || m_curr_row < m_curr_row_end);
      DBUG_ASSERT(error || m_curr_row_end <= m_rows_end);
  
      m_curr_row= m_curr_row_end;
 
    } // row processing loop

7350
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
7351
                    const_cast<Relay_log_info*>(rli)->abort_slave= 1;);
7352
    error= do_after_row_operations(rli, error);
7353
    if (!cache_stmt)
7354 7355 7356 7357
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
7358
  } // if (table)
7359

7360
  /*
7361 7362
    We need to delay this clear until here bacause unpack_current_row() uses
    master-side table definitions stored in rli.
7363 7364
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
7365
    const_cast<Relay_log_info*>(rli)->clear_tables_to_lock();
7366
  
7367 7368
  if (error)
  {                     /* error has occured during the transaction */
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    slave_rows_error_report(ERROR_LEVEL, error, rli, thd, table,
                            get_type_str(), RPL_LOG_NAME, (ulong) log_pos);
  }
  if (error)
  {
7374
    /*
7375 7376 7377 7378 7379 7380 7381 7382
      If one day we honour --skip-slave-errors in row-based replication, and
      the error should be skipped, then we would clear mappings, rollback,
      close tables, but the slave SQL thread would not stop and then may
      assume the mapping is still available, the tables are still open...
      So then we should clear mappings/rollback/close here only if this is a
      STMT_END_F.
      For now we code, knowing that error is not skippable and so slave SQL
      thread is certainly going to stop.
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7383
      rollback at the caller along with sbr.
7384
    */
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7385
    thd->reset_current_stmt_binlog_row_based();
7386
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, error);
7387
    thd->is_slave_error= 1;
7388 7389 7390
    DBUG_RETURN(error);
  }

7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412
  /*
    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
7413
      Relay_log_info::last_event_start_time and all its occurrences.
7414
    */
7415
    const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
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  }

  DBUG_RETURN(0);
}

7421
Log_event::enum_skip_reason
7422
Rows_log_event::do_shall_skip(Relay_log_info *rli)
7423 7424 7425 7426 7427 7428 7429 7430 7431 7432 7433 7434
{
  /*
    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);
}

7435 7436 7437 7438 7439 7440 7441 7442 7443 7444
/**
   The function is called at Rows_log_event statement commit time,
   normally from Rows_log_event::do_update_pos() and possibly from
   Query_log_event::do_apply_event() of the COMMIT.
   The function commits the last statement for engines, binlog and
   releases resources have been allocated for the statement.
  
   @retval  0         Ok.
   @retval  non-zero  Error at the commit.
 */
7445

7446 7447 7448
static int rows_event_stmt_cleanup(Relay_log_info const *rli, THD * thd)
{
  int error;
7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465
  {
    /*
      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);
7466

7467 7468 7469 7470 7471 7472 7473 7474 7475 7476
    /*
      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);
7477

7478 7479 7480 7481 7482 7483 7484 7485 7486 7487
    /*
      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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7488
    thd->reset_current_stmt_binlog_row_based();
7489

7490 7491 7492 7493 7494 7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512 7513 7514 7515 7516
    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 0);
  }
  return error;
}

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

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

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

  if (get_flags(STMT_END_F))
  {
    if ((error= rows_event_stmt_cleanup(rli, thd)) == 0)
7517
    {
7518 7519 7520 7521
      /*
        Indicate that a statement is finished.
        Step the group log position if we are not in a transaction,
        otherwise increase the event log position.
7522
      */
7523 7524
      rli->stmt_done(log_pos, when);

7525 7526 7527 7528 7529 7530 7531 7532 7533 7534 7535
      /*
        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
7536
    {
7537 7538 7539
      rli->report(ERROR_LEVEL, error,
                  "Error in %s event: commit of row events failed, "
                  "table `%s`.`%s`",
7540 7541
                  get_type_str(), m_table->s->db.str,
                  m_table->s->table_name.str);
7542
    }
7543
  }
7544
  else
7545
  {
7546
    rli->inc_event_relay_log_pos();
7547 7548
  }

7549
  DBUG_RETURN(error);
7550
}
7551

7552 7553 7554 7555 7556
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
7557
  uchar buf[ROWS_HEADER_LEN];	// No need to init the buffer
7558
  DBUG_ASSERT(m_table_id != ~0UL);
7559 7560 7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575
  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.
  */
7576
  uchar sbuf[sizeof(m_width)];
7577
  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
7578
  bool res= false;
7579 7580
  uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
  DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
7581

7582 7583
  DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
  res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
7584

7585 7586
  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,
7587 7588 7589 7590 7591 7592
                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
7593 7594 7595
    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,
7596 7597
                                no_bytes_in_map(&m_cols_ai));
  }
7598 7599
  DBUG_DUMP("rows", m_rows_buf, data_size);
  res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
7600 7601 7602

  return res;

7603 7604 7605
}
#endif

7606
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
7607 7608
void Rows_log_event::pack_info(Protocol *protocol)
{
7609 7610 7611
  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
7612
  size_t bytes= my_snprintf(buf, sizeof(buf),
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7613
                               "table_id: %lu%s", m_table_id, flagstr);
7614
  protocol->store(buf, bytes, &my_charset_bin);
7615 7616 7617
}
#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);
7629 7630 7631
    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
7632 7633 7634 7635 7636
    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
7637 7638
    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
7639 7640 7641 7642
  }
}
#endif

7643
/**************************************************************************
7644
	Table_map_log_event member functions and support functions
7645 7646
**************************************************************************/

7647 7648 7649 7650
/**
  @page How replication of field metadata works.
  
  When a table map is created, the master first calls 
7651
  Table_map_log_event::save_field_metadata() which calculates how many 
7652
  values will be in the field metadata. Only those fields that require the 
7653 7654 7655 7656 7657 7658 7659
  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.

7660 7661 7662 7663 7664 7665 7666
  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.

7667 7668 7669 7670 7671 7672 7673 7674 7675 7676
  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. 
7677 7678
*/

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7679
#if !defined(MYSQL_CLIENT)
7680 7681 7682 7683 7684 7685
/**
  Save the field metadata based on the real_type of the field.
  The metadata saved depends on the type of the field. Some fields
  store a single byte for pack_length() while others store two bytes
  for field_length (max length).
  
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7686
  @retval  0  Ok.
7687

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7688 7689
  @todo
  We may want to consider changing the encoding of the information.
7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707 7708
  Currently, the code attempts to minimize the number of bytes written to 
  the tablemap. There are at least two other alternatives; 1) using 
  net_store_length() to store the data allowing it to choose the number of
  bytes that are appropriate thereby making the code much easier to 
  maintain (only 1 place to change the encoding), or 2) use a fixed number
  of bytes for each field. The problem with option 1 is that net_store_length()
  will use one byte if the value < 251, but 3 bytes if it is > 250. Thus,
  for fields like CHAR which can be no larger than 255 characters, the method
  will use 3 bytes when the value is > 250. Further, every value that is
  encoded using 2 parts (e.g., pack_length, field_length) will be numerically
  > 250 therefore will use 3 bytes for eah value. The problem with option 2
  is less wasteful for space but does waste 1 byte for every field that does
  not encode 2 parts. 
*/
int Table_map_log_event::save_field_metadata()
{
  DBUG_ENTER("Table_map_log_event::save_field_metadata");
  int index= 0;
  for (unsigned int i= 0 ; i < m_table->s->fields ; i++)
7709 7710
    index+= m_table->s->field[i]->save_field_metadata(&m_field_metadata[index]);
  DBUG_RETURN(index);
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}
#endif /* !defined(MYSQL_CLIENT) */

7714 7715 7716 7717 7718 7719 7720 7721
/*
  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)
7722
  : Log_event(thd, 0, true),
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    m_table(tbl),
    m_dbnam(tbl->s->db.str),
    m_dblen(m_dbnam ? tbl->s->db.length : 0),
    m_tblnam(tbl->s->table_name.str),
    m_tbllen(tbl->s->table_name.length),
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    m_colcnt(tbl->s->fields),
    m_memory(NULL),
    m_table_id(tid),
    m_flags(flags),
    m_data_size(0),
    m_field_metadata(0),
    m_field_metadata_size(0),
    m_null_bits(0),
    m_meta_memory(NULL)
7737
{
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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

7756
  /* If malloc fails, caught in is_valid() */
7757
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
7758
  {
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    m_coltype= reinterpret_cast<uchar*>(m_memory);
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    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
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  /*
    Calculate a bitmap for the results of maybe_null() for all columns.
    The bitmap is used to determine when there is a column from the master
    that is not on the slave and is null and thus not in the row data during
    replication.
  */
  uint num_null_bytes= (m_table->s->fields + 7) / 8;
  m_data_size+= num_null_bytes;
  m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                 &m_null_bits, num_null_bytes,
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                                 &m_field_metadata, (m_colcnt * 2),
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                                 NULL);
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  bzero(m_field_metadata, (m_colcnt * 2));

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

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

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

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

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

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

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

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

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

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

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

  /* Extract the length of the various parts from the buffer */
7861
  uchar const *const ptr_dblen= (uchar const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
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  /* Length of database name + counter + terminating null */
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  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
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  /* Length of table name + counter + terminating null */
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  uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
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  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
7872

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  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
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                     (ulong) m_dblen, (long) (ptr_dblen-(const uchar*)vpart), 
                     (ulong) m_tbllen, (long) (ptr_tbllen-(const uchar*)vpart),
7876
                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
7877

7878
  /* Allocate mem for all fields in one go. If fails, caught in is_valid() */
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  m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                     &m_dbnam, (uint) m_dblen + 1,
                                     &m_tblnam, (uint) m_tbllen + 1,
                                     &m_coltype, (uint) m_colcnt,
                                     NullS);
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  if (m_memory)
  {
    /* Copy the different parts into their memory */
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    strncpy(const_cast<char*>(m_dbnam), (const char*)ptr_dblen  + 1, m_dblen + 1);
    strncpy(const_cast<char*>(m_tblnam), (const char*)ptr_tbllen + 1, m_tbllen + 1);
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    memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
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    ptr_after_colcnt= ptr_after_colcnt + m_colcnt;
7893
    bytes_read= (uint) (ptr_after_colcnt - (uchar *)buf);
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    DBUG_PRINT("info", ("Bytes read: %d.\n", bytes_read));
    if (bytes_read < event_len)
    {
      m_field_metadata_size= net_field_length(&ptr_after_colcnt);
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      DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
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      uint num_null_bytes= (m_colcnt + 7) / 8;
      m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                     &m_null_bits, num_null_bytes,
                                     &m_field_metadata, m_field_metadata_size,
                                     NULL);
      memcpy(m_field_metadata, ptr_after_colcnt, m_field_metadata_size);
      ptr_after_colcnt= (uchar*)ptr_after_colcnt + m_field_metadata_size;
      memcpy(m_null_bits, ptr_after_colcnt, num_null_bytes);
    }
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  }

  DBUG_VOID_RETURN;
}
#endif

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

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

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
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int Table_map_log_event::do_apply_event(Relay_log_info const *rli)
7933
{
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  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
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  DBUG_ENTER("Table_map_log_event::do_apply_event(Relay_log_info*)");
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  DBUG_ASSERT(rli->sql_thd == thd);

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

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

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  if (rli->sql_thd->slave_thread /* filtering is for slave only */ &&
      (!rpl_filter->db_ok(table_list->db) ||
       (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list))))
7968
  {
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    my_free(memory, MYF(MY_WME));
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  }
  else
7972
  {
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    DBUG_ASSERT(thd->lex->query_tables != table_list);
7974

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    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
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      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
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      inside Relay_log_info::clear_tables_to_lock() by calling the
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      table_def destructor explicitly.
7983
    */
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    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt, 
         m_field_metadata, m_field_metadata_size, m_null_bits);
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    table_list->m_tabledef_valid= TRUE;
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    /*
7989
      We record in the slave's information that the table should be
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      locked by linking the table into the list of tables to lock.
7991
    */
7992
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
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    const_cast<Relay_log_info*>(rli)->tables_to_lock= table_list;
    const_cast<Relay_log_info*>(rli)->tables_to_lock_count++;
7995
    /* 'memory' is freed in clear_tables_to_lock */
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  }

7998
  DBUG_RETURN(error);
7999
}
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8001
Log_event::enum_skip_reason
8002
Table_map_log_event::do_shall_skip(Relay_log_info *rli)
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{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
8008
  return continue_group(rli);
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}

8011
int Table_map_log_event::do_update_pos(Relay_log_info *rli)
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{
  rli->inc_event_relay_log_pos();
  return 0;
}

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

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
8022
  DBUG_ASSERT(m_table_id != ~0UL);
8023
  uchar buf[TABLE_MAP_HEADER_LEN];
8024 8025 8026 8027 8028 8029 8030 8031 8032 8033 8034 8035 8036 8037 8038 8039 8040 8041 8042
  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + TM_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + TM_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, TABLE_MAP_HEADER_LEN));
}

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

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  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
8045

8046 8047 8048
  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));
8049

8050 8051 8052 8053
  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
8054
  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
8055

8056
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
8057
          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
8058
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
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          my_b_safe_write(file, m_coltype, m_colcnt) ||
          my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
          my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
          my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
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 }
#endif

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

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

8075
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
8076 8077 8078
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
8079
    size_t bytes= my_snprintf(buf, sizeof(buf),
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                                 "table_id: %lu (%s.%s)",
8081
                              m_table_id, m_dbnam, m_tblnam);
8082 8083
    protocol->store(buf, bytes, &my_charset_bin);
}
8084 8085
#endif

8086 8087 8088 8089 8090 8091 8092 8093 8094

#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  if (!print_event_info->short_form)
  {
8095 8096 8097 8098 8099
    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);
8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114 8115 8116 8117 8118 8119 8120 8121 8122 8123 8124 8125 8126 8127 8128 8129 8130 8131 8132 8133
  }
}
#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)
8134 8135
int 
Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
8136 8137 8138
{
  int error= 0;

8139 8140 8141
  /**
     todo: to introduce a property for the event (handler?) which forces
     applying the event in the replace (idempotent) fashion.
8142
  */
8143 8144 8145 8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181
  if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1 ||
      m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
  {
    /*
      We are using REPLACE semantics and not INSERT IGNORE semantics
      when writing rows, that is: new rows replace old rows.  We need to
      inform the storage engine that it should use this behaviour.
    */
    
    /* Tell the storage engine that we are using REPLACE semantics. */
    thd->lex->duplicates= DUP_REPLACE;
    
    /*
      Pretend we're executing a REPLACE command: this is needed for
      InnoDB and NDB Cluster since they are not (properly) checking the
      lex->duplicates flag.
    */
    thd->lex->sql_command= SQLCOM_REPLACE;
    /* 
       Do not raise the error flag in case of hitting to an unique attribute
    */
    m_table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
    /* 
       NDB specific: update from ndb master wrapped as Write_rows
       so that the event should be applied to replace slave's row
    */
    m_table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
    /* 
       NDB specific: if update from ndb master wrapped as Write_rows
       does not find the row it's assumed idempotent binlog applying
       is taking place; don't raise the error.
    */
    m_table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
    /*
      TODO: the cluster team (Tomas?) says that it's better if the engine knows
      how many rows are going to be inserted, then it can allocate needed memory
      from the start.
    */
  }
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  /*
    We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
    any TIMESTAMP column with data from the row but instead will use
    the event's current time.
    As we replicate from TIMESTAMP to TIMESTAMP and slave has no extra
    columns, we know that all TIMESTAMP columns on slave will receive explicit
    data from the row, so TIMESTAMP_NO_AUTO_SET is ok.
    When we allow a table without TIMESTAMP to be replicated to a table having
    more columns including a TIMESTAMP column, or when we allow a TIMESTAMP
    column to be replicated into a BIGINT column and the slave's table has a
    TIMESTAMP column, then the slave's TIMESTAMP column will take its value
    from set_time() which we called earlier (consistent with SBR). And then in
    some cases we won't want TIMESTAMP_NO_AUTO_SET (will require some code to
    analyze if explicit data is provided for slave's TIMESTAMP columns).
  */
8198
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
8199 8200 8201
  
  /* Honor next number column if present */
  m_table->next_number_field= m_table->found_next_number_field;
8202 8203 8204
  return error;
}

8205
int 
8206
Write_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const,
8207
                                              int error)
8208
{
8209
  int local_error= 0;
8210
  m_table->next_number_field=0;
8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223
  if (bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1 ||
      m_table->s->db_type()->db_type == DB_TYPE_NDBCLUSTER)
  {
    m_table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
    m_table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
    /*
      resetting the extra with 
      table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
      fires bug#27077
      explanation: file->reset() performs this duty
      ultimately. Still todo: fix
    */
  }
8224
  if ((local_error= m_table->file->ha_end_bulk_insert()))
8225
  {
8226
    m_table->file->print_error(local_error, MYF(0));
8227 8228
  }
  return error? error : local_error;
8229 8230
}

8231
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244

/*
  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;
}

8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269
/**
   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;
}

8270 8271
/**
  Write the current row into event's table.
8272

8273 8274 8275 8276 8277
  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.
8278

8279 8280 8281 8282 8283
  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.
8284

8285 8286 8287 8288
  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.
8289

8290 8291 8292 8293 8294 8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305
  @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
8306
Rows_log_event::write_row(const Relay_log_info *const rli,
8307
                          const bool overwrite)
8308
{
8309 8310
  DBUG_ENTER("write_row");
  DBUG_ASSERT(m_table != NULL && thd != NULL);
8311

8312
  TABLE *table= m_table;  // pointer to event's table
8313 8314 8315 8316
  int error;
  int keynum;
  auto_afree_ptr<char> key(NULL);

8317 8318
  /* fill table->record[0] with default values */

8319
  if ((error= prepare_record(table, m_width,
8320 8321 8322 8323 8324
                             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?
8325 8326 8327 8328 8329 8330 8331 8332 8333 8334
  if (m_curr_row == m_rows_buf)
  {
    /* this is the first row to be inserted, we estimate the rows with
       the size of the first row and use that value to initialize
       storage engine for bulk insertion */
    ulong estimated_rows= (m_rows_end - m_curr_row) / (m_curr_row_end - m_curr_row);
    m_table->file->ha_start_bulk_insert(estimated_rows);
  }
  
  
8335
#ifndef DBUG_OFF
8336
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8337 8338 8339 8340
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

8341 8342 8343 8344 8345 8346 8347 8348
  /* 
    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. 
   */

8349 8350
  while ((error= table->file->ha_write_row(table->record[0])))
  {
8351 8352 8353 8354
    if (error == HA_ERR_LOCK_DEADLOCK ||
        error == HA_ERR_LOCK_WAIT_TIMEOUT ||
        (keynum= table->file->get_dup_key(error)) < 0 ||
        !overwrite)
8355
    {
8356
      DBUG_PRINT("info",("get_dup_key returns %d)", keynum));
8357
      /*
8358 8359 8360
        Deadlock, waiting for lock or just an error from the handler
        such as HA_ERR_FOUND_DUPP_KEY when overwrite is false.
        Retrieval of the duplicate key number may fail
8361 8362 8363
        - either because the error was not "duplicate key" error
        - or because the information which key is not available
      */
8364
      table->file->print_error(error, MYF(0));
8365
      DBUG_RETURN(error);
8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376
    }
    /*
       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.
     */
8377
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
8378
    {
8379
      DBUG_PRINT("info",("Locating offending record using rnd_pos()"));
8380
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
8381
      if (error)
8382
      {
8383
        DBUG_PRINT("info",("rnd_pos() returns error %d",error));
8384 8385
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8386
        table->file->print_error(error, MYF(0));
8387
        DBUG_RETURN(error);
8388
      }
8389 8390 8391
    }
    else
    {
8392 8393
      DBUG_PRINT("info",("Locating offending record using index_read_idx()"));

8394 8395
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
8396
        DBUG_PRINT("info",("Error when setting HA_EXTRA_FLUSH_CACHE"));
8397
        DBUG_RETURN(my_errno);
8398 8399 8400 8401 8402 8403
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
8404 8405
        {
          DBUG_PRINT("info",("Can't allocate key buffer"));
8406
          DBUG_RETURN(ENOMEM);
8407
        }
8408 8409
      }

8410 8411
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum,
               0);
8412 8413 8414 8415
      error= table->file->index_read_idx_map(table->record[1], keynum,
                                             (const uchar*)key.get(),
                                             HA_WHOLE_KEY,
                                             HA_READ_KEY_EXACT);
8416
      if (error)
8417
      {
8418 8419 8420
        DBUG_PRINT("info",("index_read_idx() returns %s", HA_ERR(error)));
        if (error == HA_ERR_RECORD_DELETED)
          error= HA_ERR_KEY_NOT_FOUND;
8421
        table->file->print_error(error, MYF(0));
8422
        DBUG_RETURN(error);
8423
      }
8424 8425 8426
    }

    /*
8427
       Now, record[1] should contain the offending row.  That
8428 8429
       will enable us to update it or, alternatively, delete it (so
       that we can insert the new row afterwards).
8430
     */
8431

8432 8433 8434
    /*
      If row is incomplete we will use the record found to fill 
      missing columns.  
8435
    */
8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446
    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
8447

8448
    /*
8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465
       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())
    {
8466
      DBUG_PRINT("info",("Updating row using ha_update_row()"));
8467 8468
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
8469 8470 8471 8472 8473
      switch (error) {
                
      case HA_ERR_RECORD_IS_THE_SAME:
        DBUG_PRINT("info",("ignoring HA_ERR_RECORD_IS_THE_SAME error from"
                           " ha_update_row()"));
8474
        error= 0;
8475 8476 8477 8478 8479 8480
      
      case 0:
        break;
        
      default:    
        DBUG_PRINT("info",("ha_update_row() returns error %d",error));
8481
        table->file->print_error(error, MYF(0));
8482 8483
      }
      
8484
      DBUG_RETURN(error);
8485 8486 8487
    }
    else
    {
8488
      DBUG_PRINT("info",("Deleting offending row and trying to write new one again"));
8489
      if ((error= table->file->ha_delete_row(table->record[1])))
8490
      {
8491
        DBUG_PRINT("info",("ha_delete_row() returns error %d",error));
8492
        table->file->print_error(error, MYF(0));
8493
        DBUG_RETURN(error);
8494
      }
8495 8496 8497
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
8498

8499
  DBUG_RETURN(error);
8500 8501
}

8502 8503 8504
#endif

int 
8505
Write_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8506
{
8507
  DBUG_ASSERT(m_table != NULL);
8508 8509 8510 8511
  int error=
    write_row(rli,        /* if 1 then overwrite */
              bit_is_set(slave_exec_mode, SLAVE_EXEC_MODE_IDEMPOTENT) == 1);
    
8512 8513 8514 8515 8516
  if (error && !thd->is_error())
  {
    DBUG_ASSERT(0);
    my_error(ER_UNKNOWN_ERROR, MYF(0));
  }
8517
  
8518
  return error; 
8519
}
8520

8521 8522 8523 8524 8525
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
8526
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
8527 8528 8529 8530 8531 8532 8533 8534
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
8535 8536 8537 8538 8539 8540
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
8541
{
8542 8543 8544 8545 8546 8547 8548 8549 8550 8551 8552 8553
  /*
    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.
   */

8554 8555 8556
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
  DBUG_DUMP("record[1]", table->record[1], table->s->reclength);

8557
  bool result= FALSE;
8558
  uchar saved_x[2], saved_filler[2];
8559 8560 8561 8562 8563 8564 8565 8566 8567 8568 8569 8570 8571

  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);
    }
  }

8572
  if (table->s->blob_fields + table->s->varchar_fields == 0)
8573 8574 8575 8576 8577
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

8578 8579 8580 8581
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
8582 8583 8584 8585 8586
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

8587 8588
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
8589
  {
8590
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
8591 8592 8593 8594
    {
      result= TRUE;
      goto record_compare_exit;
    }
8595
  }
8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610

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];
    }
8611
  }
8612 8613

  return result;
8614 8615
}

8616 8617
/**
  Locate the current row in event's table.
8618

8619 8620 8621 8622
  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.
8623

8624 8625 8626
  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.
8627

8628 8629 8630 8631 8632
  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. 
8633

8634 8635 8636 8637
  @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.
8638

8639 8640
  @note If the engine allows random access of the records, a combination of
  @c position() and @c rnd_pos() will be used. 
8641
 */
8642

8643
int Rows_log_event::find_row(const Relay_log_info *rli)
8644
{
8645
  DBUG_ENTER("Rows_log_event::find_row");
8646 8647

  DBUG_ASSERT(m_table && m_table->in_use != NULL);
8648

8649
  TABLE *table= m_table;
8650
  int error= 0;
8651

8652 8653 8654 8655 8656 8657 8658 8659 8660
  /*
    rpl_row_tabledefs.test specifies that
    if the extra field on the slave does not have a default value
    and this is okay with Delete or Update events.
    Todo: fix wl3228 hld that requires defauls for all types of events
  */
  
  prepare_record(table, m_width, FALSE);
  error= unpack_current_row(rli);
8661

8662 8663
#ifndef DBUG_OFF
  DBUG_PRINT("info",("looking for the following record"));
8664
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8665
#endif
8666

8667 8668
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
8669 8670 8671 8672 8673 8674
  {
    /*
      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
8675
      the "cursor" (i.e., record[0] in this case) at the correct row.
8676 8677 8678 8679 8680 8681 8682 8683 8684 8685 8686

      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);

8687
    */
8688
    DBUG_PRINT("info",("locating record using primary key (position)"));
8689
    int error= table->file->rnd_pos_by_record(table->record[0]);
8690 8691 8692
    if (error)
    {
      DBUG_PRINT("info",("rnd_pos returns error %d",error));
8693 8694
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
8695 8696
      table->file->print_error(error, MYF(0));
    }
8697
    DBUG_RETURN(error);
8698 8699
  }

8700
  // We can't use position() - try other methods.
8701 8702 8703 8704 8705
  
  /* 
    We need to retrieve all fields
    TODO: Move this out from this function to main loop 
   */
8706
  table->use_all_columns();
unknown's avatar
unknown committed
8707

8708 8709 8710 8711 8712 8713
  /*
    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]);    

8714 8715
  if (table->s->keys > 0)
  {
8716 8717
    DBUG_PRINT("info",("locating record using primary key (index_read)"));

8718
    /* We have a key: search the table using the index */
8719
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
8720 8721 8722
    {
      DBUG_PRINT("info",("ha_index_init returns error %d",error));
      table->file->print_error(error, MYF(0));
8723
      goto err;
8724
    }
8725

8726 8727 8728 8729 8730 8731 8732 8733 8734
    /* 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.
     */
8735
#ifndef HAVE_purify
8736
    DBUG_DUMP("key data", m_key, table->key_info->key_length);
8737 8738
#endif

8739 8740 8741 8742 8743 8744
    /*
      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.
    */
8745 8746 8747 8748
    if (table->s->null_bytes > 0)
      table->record[0][table->s->null_bytes - 1]|=
        256U - (1U << table->s->last_null_bit_pos);

8749
    if ((error= table->file->index_read_map(table->record[0], m_key, 
8750
                                            HA_WHOLE_KEY,
8751
                                            HA_READ_KEY_EXACT)))
8752
    {
8753
      DBUG_PRINT("info",("no record matching the key found in the table"));
8754 8755
      if (error == HA_ERR_RECORD_DELETED)
        error= HA_ERR_KEY_NOT_FOUND;
8756
      table->file->print_error(error, MYF(0));
8757
      table->file->ha_index_end();
8758
      goto err;
8759 8760
    }

8761 8762 8763 8764 8765
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
8766 8767
    DBUG_PRINT("info",("found first matching record")); 
    DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
8768
#endif
8769 8770 8771 8772 8773 8774 8775 8776 8777 8778 8779 8780 8781
    /*
      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.
8782
    */
8783
    if (table->key_info->flags & HA_NOSAME)
8784 8785
    {
      table->file->ha_index_end();
8786
      goto ok;
8787
    }
8788

8789 8790
    /*
      In case key is not unique, we still have to iterate over records found
8791 8792
      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].
8793 8794 8795
     */ 
    DBUG_PRINT("info",("non-unique index, scanning it to find matching record")); 

8796
    while (record_compare(table))
8797
    {
8798 8799 8800 8801 8802
      /*
        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.
8803 8804 8805

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
8806
      */
8807 8808
      if (table->s->null_bytes > 0)
      {
8809
        table->record[0][table->s->null_bytes - 1]|=
8810 8811 8812
          256U - (1U << table->s->last_null_bit_pos);
      }

8813
      while ((error= table->file->index_next(table->record[0])))
8814
      {
8815 8816 8817
        /* We just skip records that has already been deleted */
        if (error == HA_ERR_RECORD_DELETED)
          continue;
8818 8819
        DBUG_PRINT("info",("no record matching the given row found"));
        table->file->print_error(error, MYF(0));
8820
        table->file->ha_index_end();
8821
        goto err;
8822 8823
      }
    }
8824 8825 8826 8827 8828

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
8829 8830 8831
  }
  else
  {
8832 8833
    DBUG_PRINT("info",("locating record using table scan (rnd_next)"));

8834
    int restart_count= 0; // Number of times scanning has restarted from top
8835 8836 8837

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
8838 8839 8840 8841
    {
      DBUG_PRINT("info",("error initializing table scan"
                         " (ha_rnd_init returns %d)",error));
      table->file->print_error(error, MYF(0));
8842
      goto err;
8843
    }
8844 8845

    /* Continue until we find the right record or have made a full loop */
8846 8847
    do
    {
8848
  restart_rnd_next:
8849
      error= table->file->rnd_next(table->record[0]);
8850

8851
      DBUG_PRINT("info", ("error: %s", HA_ERR(error)));
8852
      switch (error) {
8853

8854
      case 0:
8855
        break;
8856

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

8864
      case HA_ERR_END_OF_FILE:
8865 8866 8867
        if (++restart_count < 2)
          table->file->ha_rnd_init(1);
        break;
8868 8869

      default:
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        DBUG_PRINT("info", ("Failed to get next record"
                            " (rnd_next returns %d)",error));
        table->file->print_error(error, MYF(0));
8873
        table->file->ha_rnd_end();
8874
        goto err;
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      }
    }
8877
    while (restart_count < 2 && record_compare(table));
8878 8879 8880 8881 8882
    
    /* 
      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
     */
8883

8884 8885 8886
    /*
      Have to restart the scan to be able to fetch the next row.
    */
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    if (restart_count == 2)
      DBUG_PRINT("info", ("Record not found"));
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    else
      DBUG_DUMP("record found", table->record[0], table->s->reclength);
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    table->file->ha_rnd_end();

8893
    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
8894
    goto err;
8895
  }
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ok:
  table->default_column_bitmaps();
8898
  DBUG_RETURN(0);
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err:
  table->default_column_bitmaps();
  DBUG_RETURN(error);
8903
}
8904

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#endif

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

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

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

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

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

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  if (m_table->s->keys > 0)
8947
  {
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    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
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  }
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  return 0;
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}

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

8968
int Delete_rows_log_event::do_exec_row(const Relay_log_info *const rli)
8969
{
8970
  int error;
8971
  DBUG_ASSERT(m_table != NULL);
8972

8973
  if (!(error= find_row(rli))) 
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  { 
    /*
8976
      Delete the record found, located in record[0]
8977
    */
8978
    error= m_table->file->ha_delete_row(m_table->record[0]);
8979
  }
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  return error;
}

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

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


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

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

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

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
9023
  /* if bitmap_init fails, caught in is_valid() */
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  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
9026
                          m_width,
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                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
9031
    {
9032
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
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      create_last_word_mask(&m_cols_ai);
    }
9035
  }
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}
#endif /* !defined(MYSQL_CLIENT) */

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


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

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

9063 9064 9065 9066
int 
Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
{
  if (m_table->s->keys > 0)
9067
  {
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    // Allocate buffer for key searches
    m_key= (uchar*)my_malloc(m_table->key_info->key_length, MYF(MY_WME));
    if (!m_key)
      return HA_ERR_OUT_OF_MEM;
9072 9073
  }

9074
  m_table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
9075

9076
  return 0;
9077 9078
}

9079 9080 9081
int 
Update_rows_log_event::do_after_row_operations(const Slave_reporting_capability *const, 
                                               int error)
9082 9083
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
9084 9085
  m_table->file->ha_index_or_rnd_end();
  my_free(m_key, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
9086
  m_key= NULL;
9087 9088 9089 9090

  return error;
}

9091
int 
9092
Update_rows_log_event::do_exec_row(const Relay_log_info *const rli)
9093
{
9094
  DBUG_ASSERT(m_table != NULL);
9095

9096 9097
  int error= find_row(rli); 
  if (error)
9098 9099 9100 9101 9102 9103 9104
  {
    /*
      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);
9105
    return error;
9106
  }
9107

9108
  /*
9109
    This is the situation after locating BI:
9110

9111 9112 9113
    ===|=== before image ====|=== after image ===|===
       ^                     ^
       m_curr_row            m_curr_row_end
9114

9115 9116 9117
    BI found in the table is stored in record[0]. We copy it to record[1]
    and unpack AI to record[0].
   */
9118

9119
  store_record(m_table,record[1]);
9120

9121 9122
  m_curr_row= m_curr_row_end;
  error= unpack_current_row(rli); // this also updates m_curr_row_end
9123

9124
  /*
9125
    Now we have the right row to update.  The old row (the one we're
9126
    looking for) is in record[1] and the new row is in record[0].
9127
  */
9128 9129 9130 9131 9132 9133 9134 9135 9136 9137 9138
#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]);
9139 9140
  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 0;
9141 9142 9143

  return error;
}
9144

9145 9146 9147 9148 9149 9150
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
9151
  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
9152 9153 9154
}
#endif

9155 9156 9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168

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));

9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179
  int incident_number= uint2korr(buf + common_header_len);
  if (incident_number >= INCIDENT_COUNT ||
      incident_number <= INCIDENT_NONE)
  {
    // If the incident is not recognized, this binlog event is
    // invalid.  If we set incident_number to INCIDENT_NONE, the
    // invalidity will be detected by is_valid().
    incident_number= INCIDENT_NONE;
    DBUG_VOID_RETURN;
  }
  m_incident= static_cast<Incident>(incident_number);
9180 9181
  char const *ptr= buf + common_header_len + post_header_len;
  char const *const str_end= buf + event_len;
unknown's avatar
unknown committed
9182 9183
  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
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  read_str(&ptr, str_end, &str, &len);
  m_message.str= const_cast<char*>(str);
  m_message.length= len;
  DBUG_PRINT("info", ("m_incident: %d", m_incident));
  DBUG_VOID_RETURN;
}


Incident_log_event::~Incident_log_event()
{
}


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

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

  return description[m_incident];
}


#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
9215
  size_t bytes;
9216 9217 9218 9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235 9236 9237 9238 9239 9240 9241 9242
  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
9243
Incident_log_event::do_apply_event(Relay_log_info const *rli)
9244
{
9245
  DBUG_ENTER("Incident_log_event::do_apply_event");
9246 9247 9248 9249
  rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
              ER(ER_SLAVE_INCIDENT),
              description(),
              m_message.length > 0 ? m_message.str : "<none>");
9250 9251 9252 9253 9254 9255 9256 9257 9258
  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));
9259
  uchar buf[sizeof(int16)];
9260 9261 9262 9263 9264 9265 9266 9267
  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");
9268
  DBUG_RETURN(write_str(file, m_message.str, (uint) m_message.length));
9269
}
9270 9271 9272 9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300


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