log_event.cc 211 KB
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/* Copyright (C) 2000-2004 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


#ifndef MYSQL_CLIENT
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation				// gcc: Class implementation
#endif
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#include "mysql_priv.h"
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#include "slave.h"
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#include "rpl_filter.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>
#include <my_vle.h>
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#define log_cs	&my_charset_latin1
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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(FILE* file, char* str, int len)
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{
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  char* end = str + len;
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  fputc('\'', file);
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  while (str < end)
  {
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    char c;
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    switch ((c=*str++)) {
    case '\n': fprintf(file, "\\n"); break;
    case '\r': fprintf(file, "\\r"); break;
    case '\\': fprintf(file, "\\\\"); break;
    case '\b': fprintf(file, "\\b"); break;
    case '\t': fprintf(file, "\\t"); break;
    case '\'': fprintf(file, "\\'"); break;
    case 0   : fprintf(file, "\\0"); break;
    default:
      fputc(c, file);
      break;
    }
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  }
  fputc('\'', file);
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}
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#endif /* MYSQL_CLIENT */
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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static void clear_all_errors(THD *thd, struct st_relay_log_info *rli)
{
  thd->query_error = 0;
  thd->clear_error();
  *rli->last_slave_error = 0;
  rli->last_slave_errno = 0;
}

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

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

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

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

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

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

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

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


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

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

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

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


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

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

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

#ifndef MYSQL_CLIENT
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#ifdef HAVE_REPLICATION
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/*
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  Log_event::exec_event()
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*/
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int Log_event::exec_event(struct st_relay_log_info* rli)
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{
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  DBUG_ENTER("Log_event::exec_event");

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  /*
    rli is null when (as far as I (Guilhem) know)
    the caller is
    Load_log_event::exec_event *and* that one is called from
    Execute_load_log_event::exec_event. 
    In this case, we don't do anything here ;
    Execute_load_log_event::exec_event will call Log_event::exec_event
    again later with the proper rli.
    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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  if (rli)
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  {
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    /*
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      If in a transaction, and if the slave supports transactions, just
      inc_event_relay_log_pos(). We only have to check for OPTION_BEGIN
      (not OPTION_NOT_AUTOCOMMIT) as transactions are logged with
      BEGIN/COMMIT, not with SET AUTOCOMMIT= .
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      CAUTION: opt_using_transactions means
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      innodb || bdb ; suppose the master supports InnoDB and BDB,
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      but the slave supports only BDB, problems
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      will arise:
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      - suppose an InnoDB table is created on the master,
      - then it will be MyISAM on the slave
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      - but as opt_using_transactions is true, the slave will believe he
      is transactional with the MyISAM table. And problems will come
      when one does START SLAVE; STOP SLAVE; START SLAVE; (the slave
      will resume at BEGIN whereas there has not been any rollback).
      This is the problem of using opt_using_transactions instead of a
      finer "does the slave support
      _the_transactional_handler_used_on_the_master_".

      More generally, we'll have problems when a query mixes a
      transactional handler and MyISAM and STOP SLAVE is issued in the
      middle of the "transaction". START SLAVE will resume at BEGIN
      while the MyISAM table has already been updated.
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    */
    if ((thd->options & OPTION_BEGIN) && opt_using_transactions)
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      rli->inc_event_relay_log_pos();
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    else
    {
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      rli->inc_group_relay_log_pos(log_pos);
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      flush_relay_log_info(rli);
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      /* 
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         Note that Rotate_log_event::exec_event() does not call this
         function, so there is no chance that a fake rotate event resets
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         last_master_timestamp.
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         Note that we update without mutex (probably ok - except in some very
         rare cases, only consequence is that value may take some time to
         display in Seconds_Behind_Master - not critical).
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      */
      rli->last_master_timestamp= when;
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    }
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  }
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  DBUG_RETURN(0);
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}
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/*
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  Log_event::pack_info()
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*/
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void Log_event::pack_info(Protocol *protocol)
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{
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  protocol->store("", &my_charset_bin);
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}


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/*
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  Log_event::net_send()
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  Only called by SHOW BINLOG EVENTS
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*/
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int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos)
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{
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  const char *p= strrchr(log_name, FN_LIBCHAR);
  const char *event_type;
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  if (p)
    log_name = p + 1;
  
514
  protocol->prepare_for_resend();
515
  protocol->store(log_name, &my_charset_bin);
516
  protocol->store((ulonglong) pos);
517
  event_type = get_type_str();
518
  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();
523
}
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#endif /* HAVE_REPLICATION */


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/*
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  Log_event::init_show_field_list()
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*/
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void Log_event::init_show_field_list(List<Item>* field_list)
{
  field_list->push_back(new Item_empty_string("Log_name", 20));
  field_list->push_back(new Item_return_int("Pos", 11,
					    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));
539
  field_list->push_back(new Item_return_int("End_log_pos", 11,
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					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Info", 20));
}

544

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/*
546
  Log_event::write()
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*/
548

549
bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
551 552
  byte header[LOG_EVENT_HEADER_LEN];
  DBUG_ENTER("Log_event::write_header");
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554 555
  /* 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
  */
561

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  if (is_artificial_event())
  {
    /*
      We should not do any cleanup on slave when reading this. We
      mark this by setting log_pos to 0.  Start_log_event_v3() will
      detect this on reading and set artificial_event=1 for the event.
    */
    log_pos= 0;
  }
  else  if (!log_pos)
  {
    /*
      Calculate position of end of event

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

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

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

    log_pos= my_b_safe_tell(file)+data_written;
  }

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

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

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


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/*
621
  Log_event::read_log_event()
622 623 624 625

  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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*/
627

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int Log_event::read_log_event(IO_CACHE* file, String* packet,
629
			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
632
  int result=0;
633
  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
634
  DBUG_ENTER("read_log_event");
635

636
  if (log_lock)
637
    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (byte*) buf, sizeof(buf)))
  {
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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.
    */
645
    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
649
      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
650
    goto end;
651
  }
652
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
653
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
654
      data_len > current_thd->variables.max_allowed_packet)
655
  {
656
    DBUG_PRINT("error",("data_len: %ld", data_len));
657
    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
658 659
	     LOG_READ_TOO_LARGE);
    goto end;
660
  }
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  packet->append(buf, sizeof(buf));
662
  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
663 664 665
  if (data_len)
  {
    if (packet->append(file, data_len))
666
    {
667
      /*
668 669
	Here if we hit EOF it's really an error: as data_len is >=0
        there's supposed to be more bytes available. 
670
	EOF means we are reading the event partially, which should
671
	never happen: either we read badly or the binlog is truncated.
672 673 674
      */
      result= file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO;
      /* Implicit goto end; */
675
    }
676
  }
677 678 679 680

end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
681
  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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685
#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);
688
#else
689
#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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/*
694 695
  Log_event::read_log_event()

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  NOTE:
697
    Allocates memory;  The caller is responsible for clean-up.
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*/
699

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#ifndef MYSQL_CLIENT
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
703
                                     const Format_description_log_event *description_event)
704
#else
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Log_event* Log_event::read_log_event(IO_CACHE* file,
                                     const Format_description_log_event *description_event)
707
#endif
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{
709
  DBUG_ENTER("Log_event::read_log_event(IO_CACHE *, Format_description_log_event *");
710
  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
716 717
    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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722
  LOCK_MUTEX;
723
  DBUG_PRINT("info", ("my_b_tell=%lu", my_b_tell(file)));
724
  if (my_b_read(file, (byte *) head, header_size))
725
  {
726 727
    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
729
    /*
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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.
733
    */
734
    DBUG_RETURN(0);
735
  }
736
  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;
742
  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
743
#endif
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745
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

751
  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
  if (!(buf = 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;
764
  memcpy(buf, head, header_size);
765
  if (my_b_read(file, (byte*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
770
  if ((res= read_log_event(buf, data_len, &error, description_event)))
771
    res->register_temp_buf(buf);
772

773
err:
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  UNLOCK_MUTEX;
775
  if (!res)
776
  {
777
    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;
791
  }
792
  DBUG_RETURN(res);
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}

795

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/*
797
  Log_event::read_log_event()
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
801

802 803 804
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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{
806 807
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
808
  DBUG_ASSERT(description_event != 0);
809
  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
810
  if (event_len < EVENT_LEN_OFFSET ||
811 812 813
      (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
815
  }
816

817 818 819
  /* To check the integrity of the Log_event_type enumeration */
  DBUG_ASSERT(buf[EVENT_TYPE_OFFSET] < ENUM_END_EVENT);

820
  switch(buf[EVENT_TYPE_OFFSET]) {
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  case QUERY_EVENT:
822
    ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
823
    break;
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824
  case LOAD_EVENT:
825
    ev = new Load_log_event(buf, event_len, description_event);
826
    break;
827
  case NEW_LOAD_EVENT:
828
    ev = new Load_log_event(buf, event_len, description_event);
829
    break;
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  case ROTATE_EVENT:
831
    ev = new Rotate_log_event(buf, event_len, description_event);
832
    break;
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#ifdef HAVE_REPLICATION
834
  case SLAVE_EVENT: /* can never happen (unused event) */
835 836
    ev = new Slave_log_event(buf, event_len);
    break;
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#endif /* HAVE_REPLICATION */
838
  case CREATE_FILE_EVENT:
839
    ev = new Create_file_log_event(buf, event_len, description_event);
840 841
    break;
  case APPEND_BLOCK_EVENT:
842
    ev = new Append_block_log_event(buf, event_len, description_event);
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    break;
  case DELETE_FILE_EVENT:
845
    ev = new Delete_file_log_event(buf, event_len, description_event);
846 847
    break;
  case EXEC_LOAD_EVENT:
848
    ev = new Execute_load_log_event(buf, event_len, description_event);
849
    break;
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  case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
    ev = new Start_log_event_v3(buf, description_event);
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    break;
  case STOP_EVENT:
854
    ev = new Stop_log_event(buf, description_event);
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    break;
  case INTVAR_EVENT:
857
    ev = new Intvar_log_event(buf, description_event);
858
    break;
859 860 861
  case XID_EVENT:
    ev = new Xid_log_event(buf, description_event);
    break;
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  case RAND_EVENT:
863
    ev = new Rand_log_event(buf, description_event);
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    break;
865
  case USER_VAR_EVENT:
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    ev = new User_var_log_event(buf, description_event);
    break;
  case FORMAT_DESCRIPTION_EVENT:
    ev = new Format_description_log_event(buf, event_len, description_event); 
870
    break;
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#if defined(HAVE_REPLICATION) && defined(HAVE_ROW_BASED_REPLICATION)
  case WRITE_ROWS_EVENT:
    ev = new Write_rows_log_event(buf, event_len, description_event);
    break;
  case UPDATE_ROWS_EVENT:
    ev = new Update_rows_log_event(buf, event_len, description_event);
    break;
  case DELETE_ROWS_EVENT:
    ev = new Delete_rows_log_event(buf, event_len, description_event);
    break;
  case TABLE_MAP_EVENT:
    ev = new Table_map_log_event(buf, event_len, description_event);
    break;
#endif
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  case BEGIN_LOAD_QUERY_EVENT:
    ev = new Begin_load_query_log_event(buf, event_len, description_event);
    break;
  case EXECUTE_LOAD_QUERY_EVENT:
    ev = new Execute_load_query_log_event(buf, event_len, description_event);
    break;
891
  default:
892 893
    DBUG_PRINT("error",("Unknown evernt code: %d",(int) buf[EVENT_TYPE_OFFSET]));
    ev= NULL;
894
    break;
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  }
896

897
  /*
898 899 900 901 902 903 904
    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'.
905
  */
906
  if (!ev || !ev->is_valid())
907
  {
908 909
    DBUG_PRINT("error",("Found invalid event in binary log"));

910
    delete ev;
911
#ifdef MYSQL_CLIENT
912
    if (!force_opt) /* then mysqlbinlog dies */
913 914
    {
      *error= "Found invalid event in binary log";
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      DBUG_RETURN(0);
916
    }
917
    ev= new Unknown_log_event(buf, description_event);
918 919
#else
    *error= "Found invalid event in binary log";
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    DBUG_RETURN(0);
921
#endif
922
  }
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  DBUG_RETURN(ev);  
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}

926
#ifdef MYSQL_CLIENT
927

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928
/*
929
  Log_event::print_header()
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*/
931

932
void Log_event::print_header(FILE* file, PRINT_EVENT_INFO* print_event_info)
933
{
934
  char llbuff[22];
935
  my_off_t hexdump_from= print_event_info->hexdump_from;
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937 938
  fputc('#', file);
  print_timestamp(file);
939
  fprintf(file, " server id %d  end_log_pos %s ", server_id,
940
	  llstr(log_pos,llbuff));
941

942
  /* mysqlbinlog --hexdump */
943
  if (print_event_info->hexdump_from)
944 945
  {
    fprintf(file, "\n");
946 947 948
    uchar *ptr= (uchar*)temp_buf;
    my_off_t size=
      uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
949 950
    my_off_t i;

951 952 953 954
    /* 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 */
956
    if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
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    {
      fprintf(file, "# Position  Timestamp   Type   Master ID        "
	      "Size      Master Pos    Flags \n");
      fprintf(file, "# %8.8lx %02x %02x %02x %02x   %02x   "
	      "%02x %02x %02x %02x   %02x %02x %02x %02x   "
	      "%02x %02x %02x %02x   %02x %02x\n",
963 964 965 966
	      (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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      ptr += LOG_EVENT_MINIMAL_HEADER_LEN;
      hexdump_from += LOG_EVENT_MINIMAL_HEADER_LEN;
    }
970 971 972 973 974

    /* Rest of event (without common header) */
    for (i= 0, c= char_string, h=hex_string;
	 i < size;
	 i++, ptr++)
975
    {
976 977
      my_snprintf(h, 4, "%02x ", *ptr);
      h += 3;
978

979
      *c++= my_isalnum(&my_charset_bin, *ptr) ? *ptr : '.';
980 981 982

      if (i % 16 == 15)
      {
983
	fprintf(file, "# %8.8lx %-48.48s |%16s|\n",
984 985
		(unsigned long) (hexdump_from + (i & 0xfffffff0)),
                hex_string, char_string);
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	hex_string[0]= 0;
	char_string[0]= 0;
	c= char_string;
	h= hex_string;
990
      }
991
      else if (i % 8 == 7) *h++ = ' ';
992
    }
993
    *c= '\0';
994

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    /* Non-full last line */
996
    if (hex_string[0])
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      fprintf(file, "# %8.8lx %-48.48s |%s|\n# ",
	     (unsigned long) (hexdump_from + (i & 0xfffffff0)),
             hex_string, char_string);
1000
  }
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}

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void Log_event::print_base64(FILE* file, PRINT_EVENT_INFO* print_event_info)
{
  uchar *ptr= (uchar*)temp_buf;
  my_off_t size= uint4korr(ptr + EVENT_LEN_OFFSET);

  char *tmp_str=
    (char *) my_malloc(base64_needed_encoded_length(size), MYF(MY_WME));
  if (!tmp_str) {
    fprintf(stderr, "\nError: Out of memory. "
            "Could not print correct binlog event.\n");
    return;
  }
  int res= base64_encode(ptr, size, tmp_str);
  fprintf(file, "\nBINLOG '\n%s\n';\n", tmp_str);
  my_free(tmp_str, MYF(0));
}


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/*
1023
  Log_event::print_timestamp()
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*/
1025

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void Log_event::print_timestamp(FILE* file, time_t* ts)
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{
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  struct tm *res;
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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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  fprintf(file,"%02d%02d%02d %2d:%02d:%02d",
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	  res->tm_year % 100,
	  res->tm_mon+1,
	  res->tm_mday,
	  res->tm_hour,
	  res->tm_min,
	  res->tm_sec);
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}

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#endif /* MYSQL_CLIENT */
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/**************************************************************************
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	Query_log_event methods
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**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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/*
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  Query_log_event::pack_info()
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  This (which is used only for SHOW BINLOG EVENTS) could be updated to
  print SET @@session_var=. But this is not urgent, as SHOW BINLOG EVENTS is
  only an information, it does not produce suitable queries to replay (for
  example it does not print LOAD DATA INFILE).
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*/
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void Query_log_event::pack_info(Protocol *protocol)
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{
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  // TODO: show the catalog ??
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  char *buf, *pos;
  if (!(buf= my_malloc(9 + db_len + q_len, MYF(MY_WME))))
    return;
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  pos= buf;
  if (!(flags & LOG_EVENT_SUPPRESS_USE_F)
1072
      && db && db_len)
1073
  {
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    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
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  if (query && q_len)
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  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
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  protocol->store(buf, pos-buf, &my_charset_bin);
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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}
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#endif
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#ifndef MYSQL_CLIENT
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/* Utility function for the next method */
static void write_str_with_code_and_len(char **dst, const char *src,
                                        int len, uint code)
{
  DBUG_ASSERT(src);
  *((*dst)++)= code;
  *((*dst)++)= (uchar) len;
  bmove(*dst, src, len);
  (*dst)+= len;
}


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/*
1103
  Query_log_event::write()
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  NOTES:
    In this event we have to modify the header to have the correct
    EVENT_LEN_OFFSET as we don't yet know how many status variables we
    will print!
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*/
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bool Query_log_event::write(IO_CACHE* file)
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{
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  uchar buf[QUERY_HEADER_LEN+
            1+4+           // code of flags2 and flags2
            1+8+           // code of sql_mode and sql_mode
            1+1+FN_REFLEN+ // code of catalog and catalog length and catalog
            1+4+           // code of autoinc and the 2 autoinc variables
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            1+6+           // code of charset and charset
            1+1+MAX_TIME_ZONE_NAME_LENGTH // code of tz and tz length and tz name
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            ], *start, *start_of_status;
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  ulong event_length;
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  if (!query)
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    return 1;                                   // Something wrong with event

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  /*
    We want to store the thread id:
    (- as an information for the user when he reads the binlog)
    - if the query uses temporary table: for the slave SQL thread to know to
    which master connection the temp table belongs.
1131
    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)
1187
  {
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    write_str_with_code_and_len((char **)(&start),
                                catalog, catalog_len, Q_CATALOG_NZ_CODE);
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    /*
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      In 5.0.x where x<4 masters we used to store the end zero here. This was
      a waste of one byte so we don't do it in x>=4 masters. We change code to
      Q_CATALOG_NZ_CODE, because re-using the old code would make x<4 slaves
      of this x>=4 master segfault (expecting a zero when there is
      none). Remaining compatibility problems are: the older slave will not
      find the catalog; but it is will not crash, and it's not an issue
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      that it does not find the catalog as catalogs were not used in these
      older MySQL versions (we store it in binlog and read it from relay log
      but do nothing useful with it). What is an issue is that the older slave
      will stop processing the Q_* blocks (and jumps to the db/query) as soon
      as it sees unknown Q_CATALOG_NZ_CODE; so it will not be able to read
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      Q_AUTO_INCREMENT*, Q_CHARSET and so replication will fail silently in
      various ways. Documented that you should not mix alpha/beta versions if
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      they are not exactly the same version, with example of 5.0.3->5.0.2 and
      5.0.4->5.0.3. If replication is from older to new, the new will
      recognize Q_CATALOG_CODE and have no problem.
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    */
  }
  if (auto_increment_increment != 1)
  {
    *start++= Q_AUTO_INCREMENT;
    int2store(start, auto_increment_increment);
    int2store(start+2, auto_increment_offset);
    start+= 4;
  }
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  if (charset_inited)
  {
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    *start++= Q_CHARSET_CODE;
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    memcpy(start, charset, 6);
    start+= 6;
  }
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  if (time_zone_len)
  {
    /* In the TZ sys table, column Name is of length 64 so this should be ok */
    DBUG_ASSERT(time_zone_len <= MAX_TIME_ZONE_NAME_LENGTH);
    *start++= Q_TIME_ZONE_CODE;
    *start++= time_zone_len;
    memcpy(start, time_zone_str, time_zone_len);
    start+= time_zone_len;
  }
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  /*
    Here there could be code like
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    if (command-line-option-which-says-"log_this_variable" && inited)
1234
    {
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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);
  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
  */
1249
  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, (byte*) buf, QUERY_HEADER_LEN) ||
          write_post_header_for_derived(file) ||
          my_b_safe_write(file, (byte*) start_of_status,
                          (uint) (start-start_of_status)) ||
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          my_b_safe_write(file, (db) ? (byte*) db : (byte*)"", db_len + 1) ||
          my_b_safe_write(file, (byte*) query, q_len)) ? 1 : 0;
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}

1260

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/*
1262
  Query_log_event::Query_log_event()
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*/
1264
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
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				 ulong query_length, bool using_trans,
				 bool suppress_use)
1267
  :Log_event(thd_arg,
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	     ((thd_arg->tmp_table_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0)
	      | (suppress_use          ? LOG_EVENT_SUPPRESS_USE_F    : 0)),
	     using_trans),
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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),
1273
   error_code((thd_arg->killed != THD::NOT_KILLED) ?
1274
              ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ?
1275
               0 : thd->killed_errno()) : thd_arg->net.last_errno),
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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),
1279
   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),
   auto_increment_offset(thd_arg->variables.auto_increment_offset)
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{
  time_t end_time;
  time(&end_time);
  exec_time = (ulong) (end_time  - thd->start_time);
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  catalog_len = (catalog) ? (uint32) strlen(catalog) : 0;
1288
  /* status_vars_len is set just before writing the event */
1289
  db_len = (db) ? (uint32) strlen(db) : 0;
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  /*
    If we don't use flags2 for anything else than options contained in
    thd->options, it would be more efficient to flags2=thd_arg->options
    (OPTIONS_WRITTEN_TO_BINLOG would be used only at reading time).
    But it's likely that we don't want to use 32 bits for 3 bits; in the future
    we will probably want to reclaim the 29 bits. So we need the &.
  */
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  flags2= (uint32) (thd_arg->options & OPTIONS_WRITTEN_TO_BIN_LOG);
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  DBUG_ASSERT(thd->variables.character_set_client->number < 256*256);
  DBUG_ASSERT(thd->variables.collation_connection->number < 256*256);
  DBUG_ASSERT(thd->variables.collation_server->number < 256*256);
  int2store(charset, thd_arg->variables.character_set_client->number);
  int2store(charset+2, thd_arg->variables.collation_connection->number);
  int2store(charset+4, thd_arg->variables.collation_server->number);
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  if (thd_arg->time_zone_used)
  {
    /*
      Note that our event becomes dependent on the Time_zone object
      representing the time zone. Fortunately such objects are never deleted
      or changed during mysqld's lifetime.
    */
    time_zone_len= thd_arg->variables.time_zone->get_name()->length();
    time_zone_str= thd_arg->variables.time_zone->get_name()->ptr();
  }
  else
    time_zone_len= 0;
1316
  DBUG_PRINT("info",("Query_log_event has flags2=%lu sql_mode=%lu",flags2,sql_mode));
1317
}
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#endif /* MYSQL_CLIENT */
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/* 2 utility functions for the next method */

static void get_str_len_and_pointer(const char **dst, const char **src, uint *len)
{
  if ((*len= **src))
    *dst= *src + 1;                          // Will be copied later
  (*src)+= *len+1;
}


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


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/*
1341
  Query_log_event::Query_log_event()
1342
  This is used by the SQL slave thread to prepare the event before execution.
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*/
1344

1345
Query_log_event::Query_log_event(const char* buf, uint event_len,
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                                 const Format_description_log_event *description_event,
                                 Log_event_type event_type)
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  :Log_event(buf, description_event), data_buf(0), query(NullS),
1349
   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),
   time_zone_len(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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  char *start;
  const char *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=%ld, common_header_len=%d, post_header_len=%d",
                     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)
1389
  {
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    status_vars_len= uint2korr(buf + Q_STATUS_VARS_LEN_OFFSET);
    data_len-= status_vars_len;
    DBUG_PRINT("info", ("Query_log_event has status_vars_len: %u",
                        (uint) status_vars_len));
    tmp-= 2;
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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  */
  
  start= (char*) (buf+post_header_len);
1405
  end= (const char*) (start+status_vars_len);
1406
  for (const uchar* pos= (const uchar*) start; pos < (const uchar*) end;)
1407
  {
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    switch (*pos++) {
    case Q_FLAGS2_CODE:
      flags2_inited= 1;
      flags2= uint4korr(pos);
      DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", flags2));
      pos+= 4;
      break;
    case Q_SQL_MODE_CODE:
    {
#ifndef DBUG_OFF
      char buff[22];
#endif
      sql_mode_inited= 1;
      sql_mode= (ulong) uint8korr(pos); // QQ: Fix when sql_mode is ulonglong
      DBUG_PRINT("info",("In Query_log_event, read sql_mode: %s",
			 llstr(sql_mode, buff)));
      pos+= 8;
      break;
    }
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    case Q_CATALOG_NZ_CODE:
1428
      get_str_len_and_pointer(&catalog, (const char **)(&pos), &catalog_len);
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      break;
    case Q_AUTO_INCREMENT:
      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
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    case Q_CHARSET_CODE:
    {
      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
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    case Q_TIME_ZONE_CODE:
    {
1444
      get_str_len_and_pointer(&time_zone_str, (const char **)(&pos), &time_zone_len);
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      break;
    }
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    case Q_CATALOG_CODE: /* for 5.0.x where 0<=x<=3 masters */
      if ((catalog_len= *pos))
        catalog= (char*) pos+1;                           // Will be copied later
      pos+= catalog_len+2; // leap over end 0
      catalog_nz= 0; // catalog has end 0 in event
      break;
1453 1454 1455 1456
    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)));
1457
      pos= (const uchar*) end;                         // Break loop
1458
    }
1459
  }
1460
  
1461
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
1462 1463
  if (!(start= data_buf = (char*) my_malloc(catalog_len + 1 +
                                            time_zone_len + 1 +
1464 1465 1466 1467 1468 1469 1470 1471 1472
                                            data_len + 1 +
					    QUERY_CACHE_FLAGS_SIZE +
					    db_len + 1,
					    MYF(MY_WME))))
#else
  if (!(start= data_buf = (char*) my_malloc(catalog_len + 1 +
                                            time_zone_len + 1 +
                                            data_len + 1,
					    MYF(MY_WME))))
1473
#endif
1474
      DBUG_VOID_RETURN;
1475
  if (catalog_len)                                  // If catalog is given
1476
  {
1477
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1478
      copy_str_and_move(&start, &catalog, catalog_len);
1479 1480 1481 1482 1483 1484
    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
      catalog= start;
      start+= catalog_len+1;
    }
1485
  }
1486
  if (time_zone_len)
1487 1488
    copy_str_and_move(&start, &time_zone_str, time_zone_len);

1489
  /* A 2nd variable part; this is common to all versions */ 
1490
  memcpy((char*) start, end, data_len);          // Copy db and query
1491
  start[data_len]= '\0';              // End query with \0 (For safetly)
1492 1493 1494 1495
  db= start;
  query= start + db_len + 1;
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

1498

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1499
/*
1500
  Query_log_event::print()
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1501
*/
1502

1503
#ifdef MYSQL_CLIENT
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void Query_log_event::print_query_header(FILE* file,
1505
					 PRINT_EVENT_INFO* print_event_info)
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1506
{
1507
  // TODO: print the catalog ??
1508
  char buff[40],*end;				// Enough for SET TIMESTAMP
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  bool different_db= 1;
  uint32 tmp;

1512
  if (!print_event_info->short_form)
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1513
  {
1514
    print_header(file, print_event_info);
1515 1516
    fprintf(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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1519
  if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db)
1520
  {
1521 1522
    if (different_db= memcmp(print_event_info->db, db, db_len + 1))
      memcpy(print_event_info->db, db, db_len + 1);
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1523
    if (db[0] && different_db) 
1524
      fprintf(file, "use %s;\n", db);
1525
  }
1526

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  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
  *end++=';';
  *end++='\n';
  my_fwrite(file, (byte*) buff, (uint) (end-buff),MYF(MY_NABP | MY_WME));
1531 1532
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"SET @@session.pseudo_thread_id=%lu;\n",(ulong)thread_id);
1533

1534
  /*
1535 1536 1537
    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).
1538 1539 1540 1541
  */
  if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
  {
    /* tmp is a bitmask of bits which have changed. */
1542
    if (likely(print_event_info->flags2_inited)) 
1543
      /* All bits which have changed */
1544
      tmp= (print_event_info->flags2) ^ flags2;
1545 1546
    else /* that's the first Query event we read */
    {
1547
      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;
      fprintf(file, "SET ");
      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
                   "@@session.foreign_key_checks", &need_comma);
      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
                   "@@session.sql_auto_is_null", &need_comma);
      print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
                   "@@session.unique_checks", &need_comma);
      fprintf(file,";\n");
1562
      print_event_info->flags2= flags2;
1563 1564 1565 1566
    }
  }

  /*
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
    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.
1577 1578 1579 1580
  */

  if (likely(sql_mode_inited))
  {
1581
    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
1582
    {
1583
      print_event_info->sql_mode_inited= 1;
1584
      /* force a difference to force write */
1585
      print_event_info->sql_mode= ~sql_mode;
1586
    }
1587
    if (unlikely(print_event_info->sql_mode != sql_mode))
1588 1589
    {
      fprintf(file,"SET @@session.sql_mode=%lu;\n",(ulong)sql_mode);
1590
      print_event_info->sql_mode= sql_mode;
1591 1592
    }
  }
1593 1594
  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
1595 1596 1597
  {
    fprintf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu;\n",
            auto_increment_increment,auto_increment_offset);
1598 1599
    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
1600 1601
  }

1602 1603
  /* TODO: print the catalog when we feature SET CATALOG */

1604 1605
  if (likely(charset_inited))
  {
1606
    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
1607
    {
1608 1609
      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
1610
    }
1611
    if (unlikely(bcmp(print_event_info->charset, charset, 6)))
1612 1613 1614 1615 1616 1617 1618 1619 1620
    {
      fprintf(file,"SET "
              "@@session.character_set_client=%d,"
              "@@session.collation_connection=%d,"
              "@@session.collation_server=%d"
              ";\n",
              uint2korr(charset),
              uint2korr(charset+2),
              uint2korr(charset+4));
1621
      memcpy(print_event_info->charset, charset, 6);
1622 1623
    }
  }
1624 1625
  if (time_zone_len)
  {
1626
    if (bcmp(print_event_info->time_zone_str, time_zone_str, time_zone_len+1))
1627 1628
    {
      fprintf(file,"SET @@session.time_zone='%s';\n", time_zone_str);
1629
      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
1630 1631
    }
  }
1632 1633
}

1634

1635
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
1636
{
1637
  print_query_header(file, print_event_info);
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1638
  my_fwrite(file, (byte*) query, q_len, MYF(MY_NABP | MY_WME));
1639
  fputs(";\n", file);
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1640
}
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1641
#endif /* MYSQL_CLIENT */
1642

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1643

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1644
/*
1645
  Query_log_event::exec_event()
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1646
*/
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1647

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SCRUM  
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1648
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1649
int Query_log_event::exec_event(struct st_relay_log_info* rli)
1650 1651 1652 1653 1654 1655
{
  return exec_event(rli, query, q_len);
}


int Query_log_event::exec_event(struct st_relay_log_info* rli, const char *query_arg, uint32 q_len_arg)
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{
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1657
  int expected_error,actual_error= 0;
1658 1659 1660 1661 1662 1663
  /*
    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 Query_log_event::exec_event()). Same for thd->db.
    Thank you.
  */
1664
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
1665
  thd->db_length= db_len;
1666
  thd->db= (char *) rpl_filter->get_rewrite_db(db, &thd->db_length);
1667 1668
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1669

1670
  /*
1671 1672 1673 1674 1675 1676 1677 1678
    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.
1679
  */
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1680
  rli->future_group_master_log_pos= log_pos;
1681 1682
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

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1683
  clear_all_errors(thd, rli);
1684

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1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
  /*
    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
            ::exec_event(), then the companion SET also have so we
            don't need to reset_one_shot_variables().
  */
1695
  if (rpl_filter->db_ok(thd->db))
1696 1697
  {
    thd->set_time((time_t)when);
1698 1699
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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1700
    VOID(pthread_mutex_lock(&LOCK_thread_count));
1701
    thd->query_id = next_query_id();
1702
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
1703
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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1704
    DBUG_PRINT("query",("%s",thd->query));
1705

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1706
    if (ignored_error_code((expected_error= error_code)) ||
1707
	!check_expected_error(thd,rli,expected_error))
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743
    {
      if (flags2_inited)
        /*
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG must
          take their value from flags2.
        */
        thd->options= flags2|(thd->options & ~(ulong)OPTIONS_WRITTEN_TO_BIN_LOG);
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
        Rotate_log_event which reset thd->options and sql_mode etc, so nothing to do.
      */
      /*
        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
        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).
      */
      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))))
          {
            /*
1744 1745 1746 1747
              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).
1748
            */
1749
            set_slave_thread_default_charset(thd, rli);
1750 1751 1752 1753 1754
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
        if (!(thd->variables.time_zone=
              my_tz_find_with_opening_tz_tables(thd, &tmp)))
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
1766 1767

      /* Execute the query (note that we bypass dispatch_command()) */
1768
      mysql_parse(thd, thd->query, thd->query_length);
1769 1770

    }
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1771 1772
    else
    {
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1773
      /*
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1774 1775 1776 1777 1778
        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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1779
      */
1780
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
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1781 1782
        clear_all_errors(thd, rli);        /* Can ignore query */
      else
1783
      {
1784
        slave_print_msg(ERROR_LEVEL, rli, expected_error, 
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1785
                          "\
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1786
Query partially completed on the master (error on master: %d) \
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1787 1788 1789
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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1790
START SLAVE; . Query: '%s'", expected_error, thd->query);
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1791 1792 1793 1794
        thd->query_error= 1;
      }
      goto end;
    }
1795

1796 1797 1798 1799
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
      mysql_log.write(thd,COM_QUERY,"%s",thd->query);

1800
compare_errors:
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1801 1802

     /*
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1803 1804 1805 1806
      If we expected a non-zero error code, and we don't get the same error
      code, and none of them should be ignored.
    */
    DBUG_PRINT("info",("expected_error: %d  last_errno: %d",
1807
 		       expected_error, thd->net.last_errno));
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1808
    if ((expected_error != (actual_error= thd->net.last_errno)) &&
1809 1810 1811
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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1812
    {
1813 1814 1815
      slave_print_msg(ERROR_LEVEL, rli, 0,
                      "\
Query caused different errors on master and slave.     \
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1816
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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1817
Default database: '%s'. Query: '%s'",
1818 1819 1820 1821 1822
                      ER_SAFE(expected_error),
                      expected_error,
                      actual_error ? thd->net.last_error: "no error",
                      actual_error,
                      print_slave_db_safe(db), query_arg);
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1823 1824 1825 1826 1827 1828
      thd->query_error= 1;
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
1829
 	     ignored_error_code(actual_error))
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1830 1831 1832 1833 1834 1835
    {
      DBUG_PRINT("info",("error ignored"));
      clear_all_errors(thd, rli);
    }
    /*
      Other cases: mostly we expected no error and get one.
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1836
    */
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1837 1838
    else if (thd->query_error || thd->is_fatal_error)
    {
1839 1840 1841 1842 1843
      slave_print_msg(ERROR_LEVEL, rli, actual_error,
                      "Error '%s' on query. Default database: '%s'. Query: '%s'",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"),
                      print_slave_db_safe(thd->db), query_arg);
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1844 1845
      thd->query_error= 1;
    }
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859

    /*
      TODO: compare the values of "affected rows" around here. Something
      like:
      if ((uint32) affected_in_event != (uint32) affected_on_slave)
      {
      sql_print_error("Slave: did not get the expected number of affected \
      rows running query from master - expected %d, got %d (this numbers \
      should have matched modulo 4294967296).", 0, ...);
      thd->query_error = 1;
      }
      We may also want an option to tell the slave to ignore "affected"
      mismatch. This mismatch could be implemented with a new ER_ code, and
      to ignore it you would use --slave-skip-errors...
1860

1861 1862 1863 1864 1865 1866 1867
      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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1868 1869
  } /* End of if (db_ok(... */

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1870
end:
1871
  VOID(pthread_mutex_lock(&LOCK_thread_count));
1872 1873 1874 1875 1876 1877
  /*
    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
1878 1879 1880
    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.
1881 1882
  */
  thd->db= thd->catalog= 0;	        // prevent db from being freed
1883
  thd->query= 0;			// just to be sure
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1884
  thd->query_length= thd->db_length =0;
1885
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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1886
  close_thread_tables(thd);      
1887
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
1888 1889 1890 1891 1892 1893 1894
  /*
    If there was an error we stop. Otherwise we increment positions. 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.
  */
  return (thd->query_error ? thd->query_error : 
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          (thd->one_shot_set ? (rli->inc_event_relay_log_pos(),0) :
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           Log_event::exec_event(rli))); 
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}
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#endif
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/**************************************************************************
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	Start_log_event_v3 methods
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**************************************************************************/
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#ifndef MYSQL_CLIENT
Start_log_event_v3::Start_log_event_v3() :Log_event(), binlog_version(BINLOG_VERSION), artificial_event(0)
{
  created= when;
  memcpy(server_version, ::server_version, ST_SERVER_VER_LEN);
}
#endif

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/*
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  Start_log_event_v3::pack_info()
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*/
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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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  if (!print_event_info->short_form)
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  {
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    print_header(file, print_event_info);
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    fprintf(file, "\tStart: binlog v %d, server v %s created ", binlog_version,
            server_version);
    print_timestamp(file);
    if (created)
      fprintf(file," at startup");
    fputc('\n', file);
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    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
      fprintf(file, "# Warning: this binlog was not closed properly. "
              "Most probably mysqld crashed writing it.\n");
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  }
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  if (!artificial_event && created)
  {
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#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
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    /*
      This is for mysqlbinlog: like in replication, we want to delete the stale
      tmp files left by an unclean shutdown of mysqld (temporary tables)
      and rollback unfinished transaction.
      Probably this can be done with RESET CONNECTION (syntax to be defined).
    */
    fprintf(file,"RESET CONNECTION;\n");
#else
    fprintf(file,"ROLLBACK;\n");
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#endif
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  }
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  fflush(file);
}
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#endif /* MYSQL_CLIENT */
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/*
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  Start_log_event_v3::Start_log_event_v3()
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*/
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Start_log_event_v3::Start_log_event_v3(const char* buf,
                                       const Format_description_log_event* description_event)
  :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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  created= uint4korr(buf+ST_CREATED_OFFSET);
  /* We use log_pos to mark if this was an artificial event or not */
  artificial_event= (log_pos == 0);
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}

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/*
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  Start_log_event_v3::write()
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*/
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#ifndef MYSQL_CLIENT
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bool Start_log_event_v3::write(IO_CACHE* file)
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{
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  char buff[START_V3_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy(buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
  int4store(buff + ST_CREATED_OFFSET,created);
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  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, (byte*) buff, sizeof(buff)));
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}
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#endif
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/*
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  Start_log_event_v3::exec_event()
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  The master started

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

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

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

/*
  Format_description_log_event 1st ctor.

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

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

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


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

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

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#ifndef MYSQL_CLIENT
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bool Format_description_log_event::write(IO_CACHE* file)
{
  /*
    We don't call Start_log_event_v3::write() because this would make 2
    my_b_safe_write().
  */
  byte buff[FORMAT_DESCRIPTION_HEADER_LEN];
  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
  int4store(buff + ST_CREATED_OFFSET,created);
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  buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
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  memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (byte*) post_header_len,
         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
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/*
  SYNOPSIS
    Format_description_log_event::exec_event()
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  IMPLEMENTATION
    Save the information which describes the binlog's format, to be able to
    read all coming events.
    Call Start_log_event_v3::exec_event().
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Format_description_log_event::exec_event(struct st_relay_log_info* rli)
{
  DBUG_ENTER("Format_description_log_event::exec_event");
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  /* save the information describing this binlog */
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  delete rli->relay_log.description_event_for_exec;
  rli->relay_log.description_event_for_exec= this;

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#ifdef USING_TRANSACTIONS
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  /*
    As a transaction NEVER spans on 2 or more binlogs:
    if we have an active transaction at this point, the master died
    while writing the transaction to the binary log, i.e. while
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    flushing the binlog cache to the binlog. XA guarantees that master has
    rolled back. So we roll back.
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    Note: this event could be sent by the master to inform us of the
    format of its binlog; in other words maybe it is not at its
    original place when it comes to us; we'll know this by checking
    log_pos ("artificial" events have log_pos == 0).
  */
  if (!artificial_event && created && thd->transaction.all.nht)
  {
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    /* This is not an error (XA is safe), just an information */
    slave_print_msg(INFORMATION_LEVEL, rli, 0,
                    "Rolling back unfinished transaction (no COMMIT "
                    "or ROLLBACK in relay log). A probable cause is that "
                    "the master died while writing the transaction to "
                    "its binary log, thus rolled back too."); 
    rli->cleanup_context(thd, 1);
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  }
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#endif
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  /*
    If this event comes from ourselves, there is no cleaning task to perform,
    we don't call Start_log_event_v3::exec_event() (this was just to update the
    log's description event).
  */
  if (server_id == (uint32) ::server_id)
  {
    /*
      Do not modify rli->group_master_log_pos, as this event did not exist on
      the master. That is, just update the *relay log* coordinates; this is
      done by passing log_pos=0 to inc_group_relay_log_pos, like we do in
      Stop_log_event::exec_event().
      If in a transaction, don't touch group_* coordinates.
    */
    if (thd->options & OPTION_BEGIN)
      rli->inc_event_relay_log_pos();
    else
    {
      rli->inc_group_relay_log_pos(0);
      flush_relay_log_info(rli);
    }
    DBUG_RETURN(0);
  }

  /*
    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
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    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.
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  */
  DBUG_RETURN(Start_log_event_v3::exec_event(rli));
}
#endif

  /**************************************************************************
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        Load_log_event methods
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   General note about Load_log_event: the binlogging of LOAD DATA INFILE is
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   going to be changed in 5.0 (or maybe in 5.1; not decided yet).
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   However, the 5.0 slave could still have to read such events (from a 4.x
   master), convert them (which just means maybe expand the header, when 5.0
   servers have a UID in events) (remember that whatever is after the header
   will be like in 4.x, as this event's format is not modified in 5.0 as we
   will use new types of events to log the new LOAD DATA INFILE features).
   To be able to read/convert, we just need to not assume that the common
   header is of length LOG_EVENT_HEADER_LEN (we must use the description
   event).
   Note that I (Guilhem) manually tested replication of a big LOAD DATA INFILE
   between 3.23 and 5.0, and between 4.0 and 5.0, and it works fine (and the
   positions displayed in SHOW SLAVE STATUS then are fine too).
  **************************************************************************/
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/*
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  Load_log_event::pack_info()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2354
uint Load_log_event::get_query_buffer_length()
2355
{
2356
  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
2360
    9 +                                     // " REPLACE or IGNORE "
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    13 + table_name_len*2 +                 // "INTO TABLE `table`"
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    21 + sql_ex.field_term_len*4 + 2 +      // " FIELDS TERMINATED BY 'str'"
    23 + sql_ex.enclosed_len*4 + 2 +        // " OPTIONALLY ENCLOSED BY 'str'"
    12 + sql_ex.escaped_len*4 + 2 +         // " ESCAPED BY 'str'"
    21 + sql_ex.line_term_len*4 + 2 +       // " FIELDS TERMINATED BY 'str'"
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    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'"
    15 + 22 +                               // " IGNORE xxx  LINES"
2368
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
2369
}
2370

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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)
2378
  {
2379 2380
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
2382
  }
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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 '");
2392
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
2394

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

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

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

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  /* We have to create all optinal fields as the default is not empty */
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  pos= strmov(pos, "` FIELDS TERMINATED BY ");
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  pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len);
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
    pos= strmov(pos, " OPTIONALLY ");
  pos= strmov(pos, " ENCLOSED BY ");
  pos= pretty_print_str(pos, sql_ex.enclosed, sql_ex.enclosed_len);
2416

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
2419

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
2422 2423
  if (sql_ex.line_start_len)
  {
2424
    pos= strmov(pos, " STARTING BY ");
2425
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
2426
  }
2427

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  if ((long) skip_lines > 0)
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  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
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    pos= strmov(pos," LINES ");    
  }
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  if (num_fields)
  {
    uint i;
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    const char *field= fields;
2439
    pos= strmov(pos, " (");
2440 2441 2442
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
2447
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
2450
    }
2451
    *pos++= ')';
2452
  }
2453

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  *end= pos;
}


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

  if (!(buf= my_malloc(get_query_buffer_length(), MYF(MY_WME))))
    return;
  print_query(TRUE, buf, &end, 0, 0);
  protocol->store(buf, end-buf, &my_charset_bin);
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  my_free(buf, MYF(0));
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}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
2469

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#ifndef MYSQL_CLIENT

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/*
2474
  Load_log_event::write_data_header()
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*/
2476

2477
bool Load_log_event::write_data_header(IO_CACHE* file)
2478
{
2479
  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
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  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);
2486
  return my_b_safe_write(file, (byte*)buf, LOAD_HEADER_LEN) != 0;
2487
}
2488

2489

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/*
2491
  Load_log_event::write_data_body()
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*/
2493

2494
bool Load_log_event::write_data_body(IO_CACHE* file)
2495
{
2496 2497 2498
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
2499
  {
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    if (my_b_safe_write(file, (byte*)field_lens, num_fields) ||
	my_b_safe_write(file, (byte*)fields, field_block_len))
      return 1;
2503
  }
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  return (my_b_safe_write(file, (byte*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (byte*)db, db_len + 1) ||
	  my_b_safe_write(file, (byte*)fname, fname_len));
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}

2509

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/*
2511
  Load_log_event::Load_log_event()
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*/
2513

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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,
2517
			       enum enum_duplicates handle_dup,
2518
			       bool ignore, bool using_trans)
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  :Log_event(thd_arg, !thd_arg->tmp_table_used ?
	     0 : LOG_EVENT_THREAD_SPECIFIC_F, using_trans),
   thread_id(thd_arg->thread_id),
2522
   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),
2525
   table_name(table_name_arg ? table_name_arg : ""),
2526
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
2530
  exec_time = (ulong) (end_time  - thd_arg->start_time);
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  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
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  fname_len = (fname) ? (uint) strlen(fname) : 0;
  sql_ex.field_term = (char*) ex->field_term->ptr();
  sql_ex.field_term_len = (uint8) ex->field_term->length();
  sql_ex.enclosed = (char*) ex->enclosed->ptr();
  sql_ex.enclosed_len = (uint8) ex->enclosed->length();
  sql_ex.line_term = (char*) ex->line_term->ptr();
  sql_ex.line_term_len = (uint8) ex->line_term->length();
  sql_ex.line_start = (char*) ex->line_start->ptr();
  sql_ex.line_start_len = (uint8) ex->line_start->length();
  sql_ex.escaped = (char*) ex->escaped->ptr();
  sql_ex.escaped_len = (uint8) ex->escaped->length();
  sql_ex.opt_flags = 0;
  sql_ex.cached_new_format = -1;
2547
    
2548
  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
2550
  if (ex->opt_enclosed)
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    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
2552

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  sql_ex.empty_flags= 0;
2554

2555
  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;	
2562
  }
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  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
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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;
2576
    
2577
  skip_lines = ex->skip_lines;
2578

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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);
2590 2591
  }

2592 2593 2594
  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
2596

2597

2598
/*
2599
  Load_log_event::Load_log_event()
2600

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  NOTE
    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
2604 2605
*/

2606 2607 2608 2609
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;
2626 2627
}

2628

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/*
2630
  Load_log_event::copy_log_event()
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*/
2632

2633
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
2634 2635
                                   int body_offset,
                                   const Format_description_log_event *description_event)
2636
{
2637
  DBUG_ENTER("Load_log_event::copy_log_event");
2638
  uint data_len;
2639
  char* buf_end = (char*)buf + event_len;
2640 2641
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
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  exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
  skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
  table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];
  db_len = (uint)data_head[L_DB_LEN_OFFSET];
  num_fields = uint4korr(data_head + L_NUM_FIELDS_OFFSET);
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  if ((int) event_len < body_offset)
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    DBUG_RETURN(1);
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  /*
    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.
  */
2655 2656 2657
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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    DBUG_RETURN(1);
2659
  
2660
  data_len = event_len - body_offset;
2661
  if (num_fields > data_len) // simple sanity check against corruption
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2662
    DBUG_RETURN(1);
2663
  for (uint i = 0; i < num_fields; i++)
2664
    field_block_len += (uint)field_lens[i] + 1;
2665

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  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
2670 2671
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
2672

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  DBUG_RETURN(0);
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}


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/*
2678
  Load_log_event::print()
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2679
*/
2680 2681

#ifdef MYSQL_CLIENT
2682
void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
2683
{
2684
  print(file, print_event_info, 0);
2685 2686
}

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void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
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			   bool commented)
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{
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  DBUG_ENTER("Load_log_event::print");
2692
  if (!print_event_info->short_form)
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  {
2694
    print_header(file, print_event_info);
2695
    fprintf(file, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
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	    thread_id, exec_time);
  }

2699
  bool different_db= 1;
2700
  if (db)
2701
  {
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    /*
      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.
    */
2708
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
2709
        !commented)
2710
      memcpy(print_event_info->db, db, db_len + 1);
2711
  }
2712
  
2713
  if (db && db[0] && different_db)
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    fprintf(file, "%suse %s;\n", 
            commented ? "# " : "",
            db);
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  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"%sSET @@session.pseudo_thread_id=%lu;\n",
            commented ? "# " : "", (ulong)thread_id);
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  fprintf(file, "%sLOAD DATA ",
          commented ? "# " : "");
2723 2724
  if (check_fname_outside_temp_buf())
    fprintf(file, "LOCAL ");
2725
  fprintf(file, "INFILE '%-*s' ", fname_len, fname);
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  if (sql_ex.opt_flags & REPLACE_FLAG)
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    fprintf(file," REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
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    fprintf(file," IGNORE ");
  
2732
  fprintf(file, "INTO TABLE `%s`", table_name);
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  fprintf(file, " FIELDS TERMINATED BY ");
  pretty_print_str(file, sql_ex.field_term, sql_ex.field_term_len);
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  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
    fprintf(file," OPTIONALLY ");
  fprintf(file, " ENCLOSED BY ");
  pretty_print_str(file, sql_ex.enclosed, sql_ex.enclosed_len);
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  fprintf(file, " ESCAPED BY ");
  pretty_print_str(file, sql_ex.escaped, sql_ex.escaped_len);
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  fprintf(file," LINES TERMINATED BY ");
  pretty_print_str(file, sql_ex.line_term, sql_ex.line_term_len);

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2748
  if (sql_ex.line_start)
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  {
2750
    fprintf(file," STARTING BY ");
2751
    pretty_print_str(file, sql_ex.line_start, sql_ex.line_start_len);
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  }
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  if ((long) skip_lines > 0)
    fprintf(file, " IGNORE %ld LINES", (long) skip_lines);
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  if (num_fields)
  {
    uint i;
    const char* field = fields;
2760 2761
    fprintf(file, " (");
    for (i = 0; i < num_fields; i++)
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    {
2763
      if (i)
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	fputc(',', file);
      fprintf(file, field);
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2766
	  
2767
      field += field_lens[i]  + 1;
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    }
2769 2770
    fputc(')', file);
  }
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  fprintf(file, ";\n");
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2773
  DBUG_VOID_RETURN;
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2774
}
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#endif /* MYSQL_CLIENT */
2776

2777

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2778
/*
2779
  Load_log_event::set_fields()
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2780 2781 2782 2783 2784

  Note that this function can not use the member variable 
  for the database, since LOAD DATA INFILE on the slave
  can be for a different database than the current one.
  This is the reason for the affected_db argument to this method.
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2785
*/
2786

2787
#ifndef MYSQL_CLIENT
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2788
void Load_log_event::set_fields(const char* affected_db, 
2789 2790
				List<Item> &field_list,
                                Name_resolution_context *context)
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2791 2792
{
  uint i;
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2793
  const char* field = fields;
2794
  for (i= 0; i < num_fields; i++)
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2795
  {
2796 2797
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
2798
    field+= field_lens[i]  + 1;
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  }
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}
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2801
#endif /* !MYSQL_CLIENT */
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SCRUM  
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2804
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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2805 2806
/*
  Does the data loading job when executing a LOAD DATA on the slave
2807

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2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821
  SYNOPSIS
    Load_log_event::exec_event
      net  
      rli                             
      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.
2822

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2823 2824 2825 2826 2827 2828 2829
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
 
  RETURN VALUE
    0           Success                                                 
    1    	Failure
*/
2830

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2831 2832
int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli, 
			       bool use_rli_only_for_errors)
2833
{
2834
  thd->db_length= db_len;
2835
  thd->db= (char *) rpl_filter->get_rewrite_db(db, &thd->db_length);
2836
  DBUG_ASSERT(thd->query == 0);
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2837
  thd->query_length= 0;                         // Should not be needed
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2838
  thd->query_error= 0;
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2839
  clear_all_errors(thd, rli);
2840 2841 2842

  /* see Query_log_event::exec_event() and BUG#13360 */
  DBUG_ASSERT(!rli->m_table_map.count());
2843 2844 2845 2846
  /*
    Usually mysql_init_query() is called by mysql_parse(), but we need it here
    as the present method does not call mysql_parse().
  */
2847
  mysql_init_query(thd, 0, 0);
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2848
  if (!use_rli_only_for_errors)
2849
  {
2850
    /* Saved for InnoDB, see comment in Query_log_event::exec_event() */
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2851
    rli->future_group_master_log_pos= log_pos;
2852
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
2853
  }
2854 2855
 
   /*
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2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
    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 done by testing rules in
    Create_file_log_event::exec_event() 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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2866 2867 2868 2869 2870 2871 2872 2873 2874 2875


    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
            ::exec_event(), then the companion SET also have so we
            don't need to reset_one_shot_variables().
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2876
  */
2877
  if (rpl_filter->db_ok(thd->db))
2878
  {
2879 2880
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
2881
    thd->query_id = next_query_id();
2882
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
2883 2884 2885 2886 2887 2888
    /*
      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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2889
    mysql_reset_errors(thd, 0);
2890 2891 2892 2893

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
    tables.db = thd->db;
2894
    tables.alias = tables.table_name = (char*) table_name;
2895
    tables.lock_type = TL_WRITE;
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2896
    tables.updating= 1;
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2897

2898
    // the table will be opened in mysql_load    
2899
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
2900 2901 2902 2903 2904 2905 2906 2907
    {
      // 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];
2908
      char *end;
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2909
      enum enum_duplicates handle_dup;
2910
      bool ignore= 0;
2911 2912
      char *load_data_query;

2913
      /*
2914 2915
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
2916
      */
2917
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
2918
      {
2919 2920 2921 2922 2923
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
2924
      }
2925 2926 2927 2928 2929 2930 2931

      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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2932
      if (sql_ex.opt_flags & REPLACE_FLAG)
2933
      {
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2934
	handle_dup= DUP_REPLACE;
2935
      }
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2936
      else if (sql_ex.opt_flags & IGNORE_FLAG)
2937 2938 2939 2940
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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monty@narttu.mysql.fi committed
2941
      else
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2942
      {
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monty@narttu.mysql.fi committed
2943
        /*
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2944
	  When replication is running fine, if it was DUP_ERROR on the
2945
          master then we could choose IGNORE here, because if DUP_ERROR
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2946
          suceeded on master, and data is identical on the master and slave,
2947
          then there should be no uniqueness errors on slave, so IGNORE is
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2948
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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2949 2950 2951
          (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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2952 2953

          If reading from net (a 3.23 master), mysql_load() will change this
2954
          to IGNORE.
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2955 2956
        */
        handle_dup= DUP_ERROR;
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2957
      }
2958 2959 2960 2961 2962 2963 2964 2965 2966 2967
      /*
        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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2968

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monty@narttu.mysql.fi committed
2969
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
2970 2971 2972 2973 2974
      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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2975 2976 2977 2978 2979
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
2980 2981 2982 2983 2984 2985

      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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2986
      List<Item> field_list;
2987 2988
      thd->main_lex.select_lex.context.resolve_in_table_list_only(&tables);
      set_fields(thd->db, field_list, &thd->main_lex.select_lex.context);
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2989
      thd->variables.pseudo_thread_id= thread_id;
2990
      List<Item> set_fields;
2991 2992 2993 2994 2995 2996 2997 2998 2999
      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;
      }
3000 3001 3002 3003 3004
      /*
        It is safe to use set_fields twice because we are not going to
        update it inside mysql_load().
      */
      if (mysql_load(thd, &ex, &tables, field_list, set_fields, set_fields,
3005
                     handle_dup, ignore, net != 0))
3006
        thd->query_error= 1;
3007
      if (thd->cuted_fields)
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monty@mashka.mysql.fi committed
3008
      {
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monty@mashka.mysql.fi committed
3009
	/* log_pos is the position of the LOAD event in the master log */
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3010 3011 3012 3013 3014 3015 3016
        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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3017
      }
3018 3019 3020
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3021 3022
  }
  else
3023 3024 3025 3026 3027 3028 3029 3030 3031
  {
    /*
      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);
  }
3032 3033

error:
3034
  thd->net.vio = 0; 
3035
  char *save_db= thd->db;
3036
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3037
  thd->db= thd->catalog= 0;
3038
  thd->query= 0;
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serg@serg.mylan committed
3039
  thd->query_length= thd->db_length= 0;
3040
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3041 3042 3043
  close_thread_tables(thd);
  if (thd->query_error)
  {
3044
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3045 3046 3047 3048 3049 3050 3051 3052 3053
    const char *err;
    int sql_errno;
    if ((err=thd->net.last_error)[0])
      sql_errno=thd->net.last_errno;
    else
    {
      sql_errno=ER_UNKNOWN_ERROR;
      err=ER(sql_errno);       
    }
3054
    slave_print_msg(ERROR_LEVEL, rli, sql_errno,"\
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monty@narttu.mysql.fi committed
3055
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3056
                    err, (char*)table_name, print_slave_db_safe(save_db));
3057
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3058 3059
    return 1;
  }
3060
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3061
	    
3062
  if (thd->is_fatal_error)
3063
  {
3064
    slave_print_msg(ERROR_LEVEL, rli, ER_UNKNOWN_ERROR, "\
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monty@mashka.mysql.fi committed
3065
Fatal error running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3066
                    (char*)table_name, print_slave_db_safe(save_db));
3067 3068 3069
    return 1;
  }

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monty@mashka.mysql.fi committed
3070
  return ( use_rli_only_for_errors ? 0 : Log_event::exec_event(rli) ); 
3071
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3072
#endif
3073 3074


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monty@mashka.mysql.fi committed
3075
/**************************************************************************
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monty@narttu.mysql.fi committed
3076
  Rotate_log_event methods
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monty@mashka.mysql.fi committed
3077
**************************************************************************/
3078

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monty@narttu.mysql.fi committed
3079
/*
3080
  Rotate_log_event::pack_info()
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monty@narttu.mysql.fi committed
3081
*/
3082

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SCRUM  
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3083
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3084
void Rotate_log_event::pack_info(Protocol *protocol)
3085
{
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3086
  char buf1[256], buf[22];
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3087
  String tmp(buf1, sizeof(buf1), log_cs);
3088
  tmp.length(0);
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3089
  tmp.append(new_log_ident, ident_len);
3090
  tmp.append(STRING_WITH_LEN(";pos="));
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3091 3092
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3093
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3094
#endif
3095

3096

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monty@narttu.mysql.fi committed
3097
/*
3098
  Rotate_log_event::print()
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monty@narttu.mysql.fi committed
3099
*/
3100 3101

#ifdef MYSQL_CLIENT
3102
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3103
{
3104
  char buf[22];
3105

3106
  if (print_event_info->short_form)
3107
    return;
3108
  print_header(file, print_event_info);
3109 3110 3111
  fprintf(file, "\tRotate to ");
  if (new_log_ident)
    my_fwrite(file, (byte*) new_log_ident, (uint)ident_len, 
3112
              MYF(MY_NABP | MY_WME));
3113
  fprintf(file, "  pos: %s", llstr(pos, buf));
3114
  fputc('\n', file);
3115
  fflush(file);
3116
}
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3117
#endif /* MYSQL_CLIENT */
3118 3119


3120

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monty@narttu.mysql.fi committed
3121
/*
3122
  Rotate_log_event::Rotate_log_event() (2 constructors)
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monty@narttu.mysql.fi committed
3123
*/
3124

3125 3126

#ifndef MYSQL_CLIENT
3127
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3128 3129 3130 3131 3132 3133 3134 3135
                                   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];
3136
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
3137 3138 3139 3140
  DBUG_PRINT("enter",("new_log_ident %s pos %s flags %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), flags));
#endif
  if (flags & DUP_NAME)
3141 3142
    new_log_ident= my_strdup_with_length((const byte*) new_log_ident_arg,
                                         ident_len, MYF(MY_WME));
3143 3144 3145 3146 3147
  DBUG_VOID_RETURN;
}
#endif


3148 3149
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
3150
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3151
{
3152
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3153
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3154 3155
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3156 3157
  uint ident_offset;
  if (event_len < header_size)
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3158
    DBUG_VOID_RETURN;
3159
  buf += header_size;
3160 3161 3162 3163
  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; 
3164
  set_if_smaller(ident_len,FN_REFLEN-1);
3165 3166 3167
  new_log_ident= my_strdup_with_length((byte*) buf + ident_offset,
                                       (uint) ident_len,
                                       MYF(MY_WME));
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3168
  DBUG_VOID_RETURN;
3169
}
3170 3171


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3172
/*
3173
  Rotate_log_event::write()
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3174
*/
3175

3176
#ifndef MYSQL_CLIENT
3177
bool Rotate_log_event::write(IO_CACHE* file)
3178
{
3179
  char buf[ROTATE_HEADER_LEN];
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3180
  int8store(buf + R_POS_OFFSET, pos);
3181 3182 3183
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
          my_b_safe_write(file, (byte*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (byte*)new_log_ident, (uint) ident_len));
3184
}
3185
#endif
3186

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3187
/*
3188 3189
  Rotate_log_event::exec_event()

3190
  Got a rotate log event from the master
3191

3192 3193 3194
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3195

3196
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3197
    in a A -> B -> A setup.
3198
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3199 3200 3201

  RETURN VALUES
    0	ok
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3202
*/
3203

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3204
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3205
int Rotate_log_event::exec_event(struct st_relay_log_info* rli)
3206
{
3207 3208 3209
  DBUG_ENTER("Rotate_log_event::exec_event");

  pthread_mutex_lock(&rli->data_lock);
3210
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3211 3212 3213 3214 3215 3216 3217 3218 3219
  /*
    If we are in a transaction: 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:
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
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3220 3221
    In that case, we don't want to touch the coordinates which correspond to
    the beginning of the transaction.
3222 3223
    Starting from 5.0.0, there also are some rotates from the slave itself, in
    the relay log.
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3224
  */
3225
  if (!(thd->options & OPTION_BEGIN))
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3226
  {
3227 3228
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3229 3230 3231 3232 3233
    rli->group_master_log_pos= pos;
    rli->group_relay_log_pos= rli->event_relay_log_pos;
    DBUG_PRINT("info", ("group_master_log_name: '%s' group_master_log_pos:\
%lu",
                        rli->group_master_log_name,
3234
                        (ulong) rli->group_master_log_pos));
3235
    /*
3236 3237
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3238 3239 3240 3241 3242
      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);
3243
    set_slave_thread_default_charset(thd, rli);
3244
    thd->variables.sql_mode= global_system_variables.sql_mode;
3245 3246
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3247
  }
3248 3249 3250 3251
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
  DBUG_RETURN(0);
3252
}
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3253
#endif
3254 3255


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3256
/**************************************************************************
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3257
	Intvar_log_event methods
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3258
**************************************************************************/
3259

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3260
/*
3261
  Intvar_log_event::pack_info()
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3262
*/
3263

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3264
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3265
void Intvar_log_event::pack_info(Protocol *protocol)
3266
{
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3267 3268
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3269
  *pos++= '=';
3270
  pos= longlong10_to_str(val, pos, -10);
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3271
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3272
}
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3273
#endif
3274

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3275

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3276
/*
3277
  Intvar_log_event::Intvar_log_event()
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3278
*/
3279

3280 3281 3282
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3283
{
3284 3285 3286
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3287 3288
}

3289

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3290
/*
3291
  Intvar_log_event::get_var_type_name()
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3292
*/
3293 3294

const char* Intvar_log_event::get_var_type_name()
3295
{
3296 3297 3298 3299 3300
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3301 3302
}

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3303

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3304
/*
3305
  Intvar_log_event::write()
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3306
*/
3307

3308
#ifndef MYSQL_CLIENT
3309
bool Intvar_log_event::write(IO_CACHE* file)
3310
{
3311 3312
  byte buf[9];
  buf[I_TYPE_OFFSET]= (byte) type;
3313
  int8store(buf + I_VAL_OFFSET, val);
3314 3315
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3316
}
3317
#endif
3318

3319

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3320
/*
3321
  Intvar_log_event::print()
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3322
*/
3323 3324

#ifdef MYSQL_CLIENT
3325
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3326
{
3327 3328 3329
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3330

3331
  if (!print_event_info->short_form)
3332
  {
3333
    print_header(file, print_event_info);
3334 3335
    fprintf(file, "\tIntvar\n");
  }
3336

3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347
  fprintf(file, "SET ");
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
  }
  fprintf(file, "%s=%s;\n", msg, llstr(val,llbuff));
  fflush(file);
3348
}
3349
#endif
3350

3351

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3352
/*
3353
  Intvar_log_event::exec_event()
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3354
*/
3355

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3356
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3357
int Intvar_log_event::exec_event(struct st_relay_log_info* rli)
3358
{
3359 3360 3361 3362 3363 3364 3365 3366 3367
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    thd->last_insert_id_used = 1;
    thd->last_insert_id = val;
    break;
  case INSERT_ID_EVENT:
    thd->next_insert_id = val;
    break;
  }
3368
  rli->inc_event_relay_log_pos();
3369
  return 0;
3370
}
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3371
#endif
3372

3373

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3374
/**************************************************************************
3375
  Rand_log_event methods
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3376
**************************************************************************/
3377

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3378
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3379
void Rand_log_event::pack_info(Protocol *protocol)
3380
{
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3381 3382 3383 3384 3385
  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);
3386
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3387
}
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3388
#endif
3389 3390


3391 3392 3393
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3394
{
3395 3396 3397
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3398 3399
}

3400

3401
#ifndef MYSQL_CLIENT
3402
bool Rand_log_event::write(IO_CACHE* file)
3403
{
3404
  byte buf[16];
3405 3406
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3407 3408
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3409
}
3410
#endif
3411

3412 3413

#ifdef MYSQL_CLIENT
3414
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3415
{
3416
  char llbuff[22],llbuff2[22];
3417
  if (!print_event_info->short_form)
3418
  {
3419
    print_header(file, print_event_info);
3420
    fprintf(file, "\tRand\n");
3421
  }
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3422
  fprintf(file, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s;\n",
3423
	  llstr(seed1, llbuff),llstr(seed2, llbuff2));
3424
  fflush(file);
3425
}
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3426
#endif /* MYSQL_CLIENT */
3427

3428

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3429
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3430
int Rand_log_event::exec_event(struct st_relay_log_info* rli)
3431
{
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3432 3433
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3434
  rli->inc_event_relay_log_pos();
3435 3436
  return 0;
}
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3437
#endif /* !MYSQL_CLIENT */
3438

3439

3440 3441 3442 3443
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

3444 3445 3446 3447 3448 3449 3450 3451 3452
#if !defined(DBUG_OFF) && !defined(MYSQL_CLIENT)
/*
  This static class member could be removed when mysqltest is made to support
  a --replace-regex command: then tests which have XIDs in their output can
  use this command to suppress non-deterministic XID values.
*/
my_bool Xid_log_event::show_xid;
#endif

3453 3454 3455
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3456 3457
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3458 3459 3460 3461
#if !defined(DBUG_OFF) && !defined(MYSQL_CLIENT)
  if (show_xid)
#endif
    pos= longlong10_to_str(xid, pos, 10);
3462
  pos= strmov(pos, " */");
3463 3464 3465 3466
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

3467 3468 3469 3470 3471 3472 3473 3474
/*
  NOTE it's ok not to use int8store here,
  as long as xid_t::set(ulonglong) and
  xid_t::get_my_xid doesn't do it either

  we don't care about actual values of xids as long as
  identical numbers compare identically
*/
3475 3476 3477 3478

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3479 3480 3481
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3482
  memcpy((char*) &xid, buf, sizeof(xid));
3483 3484 3485
}


3486
#ifndef MYSQL_CLIENT
3487 3488 3489 3490 3491
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
         my_b_safe_write(file, (byte*) &xid, sizeof(xid));
}
3492
#endif
3493 3494 3495


#ifdef MYSQL_CLIENT
3496
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3497
{
3498
  if (!print_event_info->short_form)
3499
  {
3500 3501 3502
    char buf[64];
    longlong10_to_str(xid, buf, 10);

3503
    print_header(file, print_event_info);
3504 3505
    fprintf(file, "\tXid = %s\n", buf);
    fflush(file);
3506
  }
3507
  fprintf(file, "COMMIT;\n");
3508 3509 3510 3511 3512 3513 3514
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::exec_event(struct st_relay_log_info* rli)
{
3515
  /* For a slave Xid_log_event is COMMIT */
3516
  mysql_log.write(thd,COM_QUERY,"COMMIT /* implicit, from Xid_log_event */");
3517
  return end_trans(thd, COMMIT) || Log_event::exec_event(rli);
3518 3519 3520 3521
}
#endif /* !MYSQL_CLIENT */


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3522
/**************************************************************************
3523
  User_var_log_event methods
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3524
**************************************************************************/
3525

3526
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3527 3528 3529
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
3530
  uint val_offset= 4 + name_len;
3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545
  uint event_len= val_offset;

  if (is_null)
  {
    buf= my_malloc(val_offset + 5, MYF(MY_WME));
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
      buf= my_malloc(val_offset + FLOATING_POINT_BUFFER, MYF(MY_WME));
3546 3547
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
3548 3549 3550 3551 3552
      break;
    case INT_RESULT:
      buf= my_malloc(val_offset + 22, MYF(MY_WME));
      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
3553 3554 3555 3556 3557 3558 3559 3560 3561 3562
    case DECIMAL_RESULT:
    {
      buf= my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH, MYF(MY_WME));
      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
      binary2my_decimal(E_DEC_FATAL_ERROR, val+2, &dec, val[0], val[1]);
      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
3563
    case STRING_RESULT:
3564 3565 3566 3567 3568 3569 3570 3571 3572 3573
      /* 15 is for 'COLLATE' and other chars */
      buf= my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15, MYF(MY_WME));
      CHARSET_INFO *cs;
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
3574 3575 3576
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
3577 3578
        event_len= p-buf;
      }
3579
      break;
3580
    case ROW_RESULT:
3581
    default:
3582 3583 3584 3585 3586
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
3587 3588 3589 3590
  buf[1]= '`';
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
  memcpy(buf+2, name, name_len);
3591
  protocol->store(buf, event_len, &my_charset_bin);
3592 3593
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
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3594
#endif /* !MYSQL_CLIENT */
3595 3596


3597 3598 3599 3600
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3601
{
3602
  buf+= description_event->common_header_len;
3603 3604
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
3605 3606
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
3607 3608 3609
  if (is_null)
  {
    type= STRING_RESULT;
3610
    charset_number= my_charset_bin.number;
3611 3612 3613 3614 3615
    val_len= 0;
    val= 0;  
  }
  else
  {
3616 3617 3618
    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 + 
3619
		       UV_CHARSET_NUMBER_SIZE);
3620 3621
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
3622 3623 3624 3625
  }
}


3626
#ifndef MYSQL_CLIENT
3627
bool User_var_log_event::write(IO_CACHE* file)
3628 3629 3630 3631
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
3632
  char buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
3633
  uint buf1_length;
3634
  ulong event_length;
3635

3636
  int4store(buf, name_len);
3637 3638 3639 3640 3641 3642 3643
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
    val_len= 0;
  }    
  else
3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654
  {
    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;
3655 3656 3657 3658 3659 3660
    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;
3661
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
3662 3663 3664
      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
3665 3666 3667
    case STRING_RESULT:
      pos= val;
      break;
3668
    case ROW_RESULT:
3669
    default:
3670 3671 3672
      DBUG_ASSERT(1);
      return 0;
    }
3673 3674
    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
3675
  }
3676 3677 3678 3679 3680 3681

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

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) buf, sizeof(buf))   ||
3682 3683 3684
	  my_b_safe_write(file, (byte*) name, name_len)     ||
	  my_b_safe_write(file, (byte*) buf1, buf1_length) ||
	  my_b_safe_write(file, (byte*) pos, val_len));
3685
}
3686
#endif
3687

3688

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3689
/*
3690
  User_var_log_event::print()
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3691
*/
3692 3693

#ifdef MYSQL_CLIENT
3694
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3695
{
3696
  if (!print_event_info->short_form)
3697
  {
3698
    print_header(file, print_event_info);
3699 3700 3701
    fprintf(file, "\tUser_var\n");
  }

3702
  fprintf(file, "SET @`");
3703
  my_fwrite(file, (byte*) name, (uint) (name_len), MYF(MY_NABP | MY_WME));
3704
  fprintf(file, "`");
3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722

  if (is_null)
  {
    fprintf(file, ":=NULL;\n");
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
      fprintf(file, ":=%.14g;\n", real_val);
      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
      fprintf(file, ":=%s;\n", int_buf);
      break;
3723 3724 3725 3726 3727 3728
    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
3729 3730
      decimal_digit_t dec_buf[10];
      decimal_t dec;
3731 3732 3733 3734 3735 3736
      dec.len= 10;
      dec.buf= dec_buf;

      bin2decimal(val+2, &dec, precision, scale);
      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
3737
      fprintf(file, ":=%s;\n",str_buf);
3738 3739
      break;
    }
3740
    case STRING_RESULT:
3741
    {
3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755
      /*
        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.
      */
3756 3757 3758 3759
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
3760
        break; // no error, as we are 'void'
3761
      str_to_hex(hex_str, val, val_len);
3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774
      /*
        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.
        */
        fprintf(file, ":=???;\n");
      else
3775
        fprintf(file, ":=_%s %s COLLATE `%s`;\n", cs->csname, hex_str, cs->name);
3776
      my_afree(hex_str);
3777
    }
3778
      break;
3779
    case ROW_RESULT:
3780
    default:
3781
      DBUG_ASSERT(1);
3782 3783 3784 3785 3786
      return;
    }
  }
  fflush(file);
}
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3787
#endif
3788

3789

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3790
/*
3791
  User_var_log_event::exec_event()
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3792
*/
3793

3794
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3795 3796 3797
int User_var_log_event::exec_event(struct st_relay_log_info* rli)
{
  Item *it= 0;
3798 3799 3800
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
3801 3802 3803
  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
3804 3805
  double real_val;
  longlong int_val;
3806 3807 3808 3809 3810 3811 3812 3813 3814 3815

  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
3816
      it= new Item_float(real_val);
3817
      val= (char*) &real_val;		// Pointer to value in native format
3818
      val_len= 8;
3819 3820
      break;
    case INT_RESULT:
3821 3822 3823
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
3824
      val_len= 8;
3825
      break;
3826 3827 3828 3829 3830 3831 3832 3833
    case DECIMAL_RESULT:
    {
      Item_decimal *dec= new Item_decimal(val+2, val[0], val[1]);
      it= dec;
      val= (char *)dec->val_decimal(NULL);
      val_len= sizeof(my_decimal);
      break;
    }
3834 3835 3836
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
3837
    case ROW_RESULT:
3838
    default:
3839 3840 3841 3842 3843
      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
3844 3845 3846 3847
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
3848
  e.fix_fields(thd, 0);
3849 3850 3851 3852 3853
  /*
    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.
   */
3854
  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT);
3855
  free_root(thd->mem_root,0);
3856

3857
  rli->inc_event_relay_log_pos();
3858 3859
  return 0;
}
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3860
#endif /* !MYSQL_CLIENT */
3861 3862


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3863
/**************************************************************************
3864
  Slave_log_event methods
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3865
**************************************************************************/
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3867
#ifdef HAVE_REPLICATION
3868
#ifdef MYSQL_CLIENT
3869
void Unknown_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3870
{
3871
  if (print_event_info->short_form)
3872
    return;
3873
  print_header(file, print_event_info);
3874 3875 3876 3877
  fputc('\n', file);
  fprintf(file, "# %s", "Unknown event\n");
}
#endif  
3878

3879
#ifndef MYSQL_CLIENT
3880
void Slave_log_event::pack_info(Protocol *protocol)
3881
{
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3882
  char buf[256+HOSTNAME_LENGTH], *pos;
3883 3884 3885 3886 3887 3888 3889
  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=");
3890
  pos= longlong10_to_str(master_pos, pos, 10);
3891
  protocol->store(buf, pos-buf, &my_charset_bin);
3892
}
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#endif /* !MYSQL_CLIENT */
3894 3895 3896 3897


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
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				 struct st_relay_log_info* rli)
3899
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
3900 3901 3902 3903
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
3904

3905 3906 3907 3908 3909
  MASTER_INFO* mi = rli->mi;
  // TODO: re-write this better without holding both locks at the same time
  pthread_mutex_lock(&mi->data_lock);
  pthread_mutex_lock(&rli->data_lock);
  master_host_len = strlen(mi->host);
3910
  master_log_len = strlen(rli->group_master_log_name);
3911 3912 3913
  // 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))))
3914
  {
3915 3916 3917
    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;
3918
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
3919
    master_port = mi->port;
3920
    master_pos = rli->group_master_log_pos;
3921 3922
    DBUG_PRINT("info", ("master_log: %s  pos: %d", master_log,
			(ulong) master_pos));
3923
  }
3924 3925 3926 3927 3928 3929
  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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3930
#endif /* !MYSQL_CLIENT */
3931 3932 3933 3934 3935 3936 3937 3938 3939


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


#ifdef MYSQL_CLIENT
3940
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3941 3942
{
  char llbuff[22];
3943
  if (print_event_info->short_form)
3944
    return;
3945
  print_header(file, print_event_info);
3946
  fputc('\n', file);
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3947 3948
  fprintf(file, "\
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
3949 3950
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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3951
#endif /* MYSQL_CLIENT */
3952 3953 3954 3955 3956 3957 3958 3959


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


3960
#ifndef MYSQL_CLIENT
3961
bool Slave_log_event::write(IO_CACHE* file)
3962
{
3963
  ulong event_length= get_data_size();
3964 3965 3966
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
3967 3968 3969

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) mem_pool, event_length));
3970
}
3971
#endif
3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982


void Slave_log_event::init_from_mem_pool(int data_size)
{
  master_pos = uint8korr(mem_pool + SL_MASTER_POS_OFFSET);
  master_port = uint2korr(mem_pool + SL_MASTER_PORT_OFFSET);
  master_host = mem_pool + SL_MASTER_HOST_OFFSET;
  master_host_len = strlen(master_host);
  // safety
  master_log = master_host + master_host_len + 1;
  if (master_log > mem_pool + data_size)
3983
  {
3984 3985
    master_host = 0;
    return;
3986
  }
3987 3988
  master_log_len = strlen(master_log);
}
3989

3990

3991 3992 3993
/* This code is not used, so has not been updated to be format-tolerant */
Slave_log_event::Slave_log_event(const char* buf, uint event_len)
  :Log_event(buf,0) /*unused event*/ ,mem_pool(0),master_host(0)
3994
{
3995
  if (event_len < LOG_EVENT_HEADER_LEN)
3996
    return;
3997
  event_len -= LOG_EVENT_HEADER_LEN;
3998 3999 4000 4001 4002
  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);
4003 4004
}

4005

4006 4007 4008 4009 4010 4011 4012
#ifndef MYSQL_CLIENT
int Slave_log_event::exec_event(struct st_relay_log_info* rli)
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  return Log_event::exec_event(rli);
}
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4013
#endif /* !MYSQL_CLIENT */
4014 4015


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4016
/**************************************************************************
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4017
	Stop_log_event methods
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4018
**************************************************************************/
4019

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monty@narttu.mysql.fi committed
4020
/*
4021
  Stop_log_event::print()
4022
*/
4023 4024

#ifdef MYSQL_CLIENT
4025
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4026
{
4027
  if (print_event_info->short_form)
4028 4029
    return;

4030
  print_header(file, print_event_info);
4031 4032
  fprintf(file, "\tStop\n");
  fflush(file);
4033
}
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4034
#endif /* MYSQL_CLIENT */
4035

4036

4037
/*
4038
  Stop_log_event::exec_event()
4039

4040
  The master stopped.
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4041
  We used to clean up all temporary tables but this is useless as, as the
4042 4043
  master has shut down properly, it has written all DROP TEMPORARY TABLE
  (prepared statements' deletion is TODO only when we binlog prep stmts).
4044 4045 4046
  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.
4047
  The place were we must do this cleaning is in Start_log_event_v3::exec_event(),
4048
  not here. Because if we come here, the master was sane.
4049 4050
*/

4051
#ifndef MYSQL_CLIENT
4052
int Stop_log_event::exec_event(struct st_relay_log_info* rli)
4053
{
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4054 4055
  /*
    We do not want to update master_log pos because we get a rotate event
4056
    before stop, so by now group_master_log_name is set to the next log.
4057
    If we updated it, we will have incorrect master coordinates and this
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4058
    could give false triggers in MASTER_POS_WAIT() that we have reached
4059
    the target position when in fact we have not.
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4060
  */
4061 4062 4063 4064 4065 4066 4067
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4068 4069
  return 0;
}
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4070
#endif /* !MYSQL_CLIENT */
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4071
#endif /* HAVE_REPLICATION */
4072

4073

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4074
/**************************************************************************
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4075
	Create_file_log_event methods
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4076
**************************************************************************/
4077 4078

/*
4079
  Create_file_log_event ctor
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4080
*/
4081 4082

#ifndef MYSQL_CLIENT
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4083 4084 4085 4086
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,
4087
                      bool ignore,
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4088
		      char* block_arg, uint block_len_arg, bool using_trans)
4089
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4090
		  using_trans),
4091
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4092
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4093
{
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4094
  DBUG_ENTER("Create_file_log_event");
4095
  sql_ex.force_new_format();
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4096
  DBUG_VOID_RETURN;
4097
}
4098

4099

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4100
/*
4101
  Create_file_log_event::write_data_body()
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4102
*/
4103

4104
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4105
{
4106 4107
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4108 4109
    return res;
  return (my_b_safe_write(file, (byte*) "", 1) ||
4110
          my_b_safe_write(file, (byte*) block, block_len));
4111 4112
}

4113

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4114
/*
4115
  Create_file_log_event::write_data_header()
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4116
*/
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4117

4118
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4119
{
4120
  bool res;
4121
  byte buf[CREATE_FILE_HEADER_LEN];
4122 4123
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4124
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4125
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4126 4127 4128
}


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4129
/*
4130
  Create_file_log_event::write_base()
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4131
*/
4132

4133
bool Create_file_log_event::write_base(IO_CACHE* file)
4134
{
4135 4136 4137 4138
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4139 4140 4141
  return res;
}

4142
#endif /* !MYSQL_CLIENT */
4143

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4144
/*
4145
  Create_file_log_event ctor
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monty@narttu.mysql.fi committed
4146
*/
4147

4148 4149 4150
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)
4151
{
4152 4153 4154 4155 4156
  DBUG_ENTER("Create_file_log_event::Create_file_log_event(char*,...)");
  uint block_offset;
  uint header_len= description_event->common_header_len;
  uint8 load_header_len= description_event->post_header_len[LOAD_EVENT-1];
  uint8 create_file_header_len= description_event->post_header_len[CREATE_FILE_EVENT-1];
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4157
  if (!(event_buf= my_memdup((byte*) buf, len, MYF(MY_WME))) ||
4158 4159 4160 4161 4162 4163 4164
      copy_log_event(event_buf,len,
                     ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                      load_header_len + header_len :
                      (fake_base ? (header_len+load_header_len) :
                       (header_len+load_header_len) +
                       create_file_header_len)),
                     description_event))
monty@mysql.com's avatar
monty@mysql.com committed
4165
    DBUG_VOID_RETURN;
4166
  if (description_event->binlog_version!=1)
4167
  {
4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184
    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);
4185 4186 4187 4188 4189 4190 4191 4192 4193
    if (len < block_offset)
      return;
    block = (char*)buf + block_offset;
    block_len = len - block_offset;
  }
  else
  {
    sql_ex.force_new_format();
    inited_from_old = 1;
4194
  }
monty@mysql.com's avatar
monty@mysql.com committed
4195
  DBUG_VOID_RETURN;
4196 4197
}

4198

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4199
/*
4200
  Create_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4201
*/
4202 4203

#ifdef MYSQL_CLIENT
4204
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
lars@mysql.com's avatar
lars@mysql.com committed
4205
				  bool enable_local)
nick@mysql.com's avatar
nick@mysql.com committed
4206
{
4207
  if (print_event_info->short_form)
4208 4209
  {
    if (enable_local && check_fname_outside_temp_buf())
4210
      Load_log_event::print(file, print_event_info);
4211
    return;
4212 4213 4214 4215
  }

  if (enable_local)
  {
4216
    Load_log_event::print(file, print_event_info,
4217
			  !check_fname_outside_temp_buf());
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monty@narttu.mysql.fi committed
4218 4219 4220 4221 4222
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
    fprintf(file, "#"); 
4223 4224
  }

4225
  fprintf(file, " file_id: %d  block_len: %d\n", file_id, block_len);
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4226
}
4227

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4228

4229
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4230
{
4231
  print(file, print_event_info, 0);
4232
}
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monty@mashka.mysql.fi committed
4233
#endif /* MYSQL_CLIENT */
nick@mysql.com's avatar
nick@mysql.com committed
4234

4235

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4236
/*
4237
  Create_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4238
*/
4239

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4240
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4241
void Create_file_log_event::pack_info(Protocol *protocol)
4242
{
4243 4244 4245
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4246
  pos= strmov(pos + db_len, ";table=");
4247
  memcpy(pos, table_name, table_name_len);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4248
  pos= strmov(pos + table_name_len, ";file_id=");
4249 4250 4251
  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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monty@mashka.mysql.fi committed
4252
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4253
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4254
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4255 4256


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4257
/*
4258
  Create_file_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4259
*/
4260

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4261
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4262
int Create_file_log_event::exec_event(struct st_relay_log_info* rli)
4263
{
4264 4265
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4266 4267 4268
  int fd = -1;
  IO_CACHE file;
  int error = 1;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4269

4270
  bzero((char*)&file, sizeof(file));
4271 4272
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4273
  thd->proc_info= proc_info;
4274 4275 4276 4277
  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 ||
4278 4279 4280
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4281 4282
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4283 4284 4285 4286
    goto err;
  }
  
  // a trick to avoid allocating another buffer
4287 4288
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4289 4290
  if (write_base(&file))
  {
4291
    strmov(ext, ".info"); // to have it right in the error message
4292 4293 4294
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in Create_file event: could not write to file '%s'",
                    fname_buf);
4295 4296 4297 4298 4299 4300
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4301 4302 4303 4304
  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)
4305
  {
4306 4307
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4308 4309
    goto err;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4310
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4311
  {
4312 4313
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "write to '%s' failed", fname_buf);
4314 4315
    goto err;
  }
4316 4317
  error=0;					// Everything is ok

4318 4319 4320 4321 4322
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
4323
  thd->proc_info= 0;
4324
  return error ? 1 : Log_event::exec_event(rli);
4325
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4326
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4327

4328

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4329
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4330
	Append_block_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4331
**************************************************************************/
4332

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4333
/*
4334
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4335
*/
4336 4337

#ifndef MYSQL_CLIENT  
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4338 4339
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4340 4341 4342
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4343
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4344 4345
{
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4346
#endif
4347 4348


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4349
/*
4350
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4351
*/
4352

4353 4354 4355
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)
4356
{
4357 4358 4359 4360 4361 4362
  DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
  uint8 common_header_len= description_event->common_header_len; 
  uint8 append_block_header_len=
    description_event->post_header_len[APPEND_BLOCK_EVENT-1];
  uint total_header_len= common_header_len+append_block_header_len;
  if (len < total_header_len)
monty@mysql.com's avatar
monty@mysql.com committed
4363
    DBUG_VOID_RETURN;
4364 4365 4366
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
  block= (char*)buf + total_header_len;
  block_len= len - total_header_len;
monty@mysql.com's avatar
monty@mysql.com committed
4367
  DBUG_VOID_RETURN;
4368 4369 4370
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4371
/*
4372
  Append_block_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4373
*/
4374

4375
#ifndef MYSQL_CLIENT
4376
bool Append_block_log_event::write(IO_CACHE* file)
4377 4378 4379
{
  byte buf[APPEND_BLOCK_HEADER_LEN];
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4380 4381
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4382 4383
	  my_b_safe_write(file, (byte*) block, block_len));
}
4384
#endif
4385 4386


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4387
/*
4388
  Append_block_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4389
*/
4390 4391

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4392
void Append_block_log_event::print(FILE* file,
4393
				   PRINT_EVENT_INFO* print_event_info)
4394
{
4395
  if (print_event_info->short_form)
4396
    return;
4397
  print_header(file, print_event_info);
4398
  fputc('\n', file);
4399 4400
  fprintf(file, "#%s: file_id: %d  block_len: %d\n",
	  get_type_str(), file_id, block_len);
4401
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4402
#endif /* MYSQL_CLIENT */
4403 4404


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4405
/*
4406
  Append_block_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4407
*/
4408

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4409
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4410
void Append_block_log_event::pack_info(Protocol *protocol)
4411 4412 4413 4414 4415 4416
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4417
  protocol->store(buf, length, &my_charset_bin);
4418 4419 4420
}


4421
/*
4422
  Append_block_log_event::get_create_or_append()
4423 4424
*/

4425
int Append_block_log_event::get_create_or_append() const
4426
{
4427
  return 0; /* append to the file, fail if not exists */
4428 4429
}

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4430
/*
4431
  Append_block_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4432
*/
4433

4434
int Append_block_log_event::exec_event(struct st_relay_log_info* rli)
4435
{
4436
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
4437
  int fd;
4438
  int error = 1;
monty@mysql.com's avatar
monty@mysql.com committed
4439
  DBUG_ENTER("Append_block_log_event::exec_event");
4440

4441 4442
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
4443
  thd->proc_info= proc_info;
4444 4445 4446 4447 4448 4449 4450
  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)
    {
4451 4452 4453
      slave_print_msg(ERROR_LEVEL, rli, my_errno,
                      "Error in %s event: could not create file '%s'",
                      get_type_str(), fname);
4454 4455 4456
      goto err;
    }
  }
4457 4458
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
4459
  {
4460 4461 4462
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: could not open file '%s'",
                    get_type_str(), fname);
4463 4464
    goto err;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4465
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4466
  {
4467 4468 4469
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: write to '%s' failed",
                    get_type_str(), fname);
4470 4471 4472
    goto err;
  }
  error=0;
4473

4474 4475 4476
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
4477
  thd->proc_info= 0;
monty@mysql.com's avatar
monty@mysql.com committed
4478
  DBUG_RETURN(error ? error : Log_event::exec_event(rli));
4479
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4480
#endif
4481 4482


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4483
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4484
	Delete_file_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4485
**************************************************************************/
4486

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4487
/*
4488
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4489
*/
4490 4491

#ifndef MYSQL_CLIENT
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4492 4493 4494
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)
4495 4496
{
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4497
#endif
4498

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monty@narttu.mysql.fi committed
4499
/*
4500
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4501
*/
4502

4503 4504 4505
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)
4506
{
4507 4508 4509
  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))
4510
    return;
4511
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
4512 4513 4514
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4515
/*
4516
  Delete_file_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4517
*/
4518

4519
#ifndef MYSQL_CLIENT
4520
bool Delete_file_log_event::write(IO_CACHE* file)
4521 4522 4523
{
 byte buf[DELETE_FILE_HEADER_LEN];
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
4524 4525
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
4526
}
4527
#endif
4528 4529


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4530
/*
4531
  Delete_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4532
*/
4533 4534

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4535
void Delete_file_log_event::print(FILE* file,
4536
				  PRINT_EVENT_INFO* print_event_info)
4537
{
4538
  if (print_event_info->short_form)
4539
    return;
4540
  print_header(file, print_event_info);
4541 4542 4543
  fputc('\n', file);
  fprintf(file, "#Delete_file: file_id=%u\n", file_id);
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4544
#endif /* MYSQL_CLIENT */
4545

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4546
/*
4547
  Delete_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4548
*/
4549

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4550
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4551
void Delete_file_log_event::pack_info(Protocol *protocol)
4552 4553 4554 4555
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4556
  protocol->store(buf, (int32) length, &my_charset_bin);
4557
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4558
#endif
4559

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4560
/*
4561
  Delete_file_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4562
*/
4563

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4564
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4565 4566 4567
int Delete_file_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
4568
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
4569
  (void) my_delete(fname, MYF(MY_WME));
4570
  strmov(ext, ".info");
4571 4572 4573
  (void) my_delete(fname, MYF(MY_WME));
  return Log_event::exec_event(rli);
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4574
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4575 4576


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monty@mashka.mysql.fi committed
4577
/**************************************************************************
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4578
	Execute_load_log_event methods
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4579
**************************************************************************/
4580

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4581
/*
4582
  Execute_load_log_event ctor
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4583
*/
4584 4585

#ifndef MYSQL_CLIENT  
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Execute_load_log_event::Execute_load_log_event(THD *thd_arg, const char* db_arg,
					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
4589 4590
{
}
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#endif
4592 4593
  

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/*
4595
  Execute_load_log_event ctor
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4596
*/
4597

4598 4599 4600
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)
4601
{
4602 4603 4604
  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))
4605
    return;
4606
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
4607 4608 4609
}


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4610
/*
4611
  Execute_load_log_event::write()
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4612
*/
4613

4614
#ifndef MYSQL_CLIENT
4615
bool Execute_load_log_event::write(IO_CACHE* file)
4616 4617 4618
{
  byte buf[EXEC_LOAD_HEADER_LEN];
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
4619 4620
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
4621
}
4622
#endif
4623 4624


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4625
/*
4626
  Execute_load_log_event::print()
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4627
*/
4628 4629

#ifdef MYSQL_CLIENT  
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4630
void Execute_load_log_event::print(FILE* file,
4631
				   PRINT_EVENT_INFO* print_event_info)
4632
{
4633
  if (print_event_info->short_form)
4634
    return;
4635
  print_header(file, print_event_info);
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  fputc('\n', file);
  fprintf(file, "#Exec_load: file_id=%d\n",
	  file_id);
}
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#endif
4641

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4642
/*
4643
  Execute_load_log_event::pack_info()
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4644
*/
4645

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SCRUM  
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4646
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4647
void Execute_load_log_event::pack_info(Protocol *protocol)
4648 4649 4650 4651
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4652
  protocol->store(buf, (int32) length, &my_charset_bin);
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}


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monty@narttu.mysql.fi committed
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/*
4657
  Execute_load_log_event::exec_event()
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4658
*/
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SCRUM  
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4659

4660
int Execute_load_log_event::exec_event(struct st_relay_log_info* rli)
4661 4662
{
  char fname[FN_REFLEN+10];
4663
  char *ext;
4664
  int fd;
4665
  int error= 1;
4666
  IO_CACHE file;
4667
  Load_log_event *lev= 0;
4668

4669
  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
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  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
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      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4675 4676
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Exec_load event: "
                    "could not open file '%s'", fname);
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    goto err;
  }
4679
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
4680 4681
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
4682
      lev->get_type_code() != NEW_LOAD_EVENT)
4683
  {
4684 4685
    slave_print_msg(ERROR_LEVEL, rli, 0, "Error in Exec_load event: "
                    "file '%s' appears corrupted", fname);
4686 4687
    goto err;
  }
4688

4689
  lev->thd = thd;
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  /*
    lev->exec_event should use rli only for errors
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    i.e. should not advance rli's position.
    lev->exec_event is the place where the table is loaded (it calls
    mysql_load()).
4695
  */
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4696

4697
  rli->future_group_master_log_pos= log_pos;
4698
  if (lev->exec_event(0,rli,1)) 
4699
  {
4700 4701 4702 4703 4704 4705 4706 4707 4708
    /*
      We want to indicate the name of the file that could not be loaded
      (SQL_LOADxxx).
      But as we are here we are sure the error is in rli->last_slave_error and
      rli->last_slave_errno (example of error: duplicate entry for key), so we
      don't want to overwrite it with the filename.
      What we want instead is add the filename to the current error message.
    */
    char *tmp= my_strdup(rli->last_slave_error,MYF(MY_WME));
4709 4710
    if (tmp)
    {
4711 4712 4713 4714
      slave_print_msg(ERROR_LEVEL, rli,
                      rli->last_slave_errno, /* ok to re-use error code */
                      "%s. Failed executing load from '%s'", 
                      tmp, fname);
4715 4716
      my_free(tmp,MYF(0));
    }
4717 4718
    goto err;
  }
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  /*
    We have an open file descriptor to the .info file; we need to close it
    or Windows will refuse to delete the file in my_delete().
  */
  if (fd >= 0)
  {
    my_close(fd, MYF(0));
    end_io_cache(&file);
    fd= -1;
  }
4729
  (void) my_delete(fname, MYF(MY_WME));
4730
  memcpy(ext, ".data", 6);
4731
  (void) my_delete(fname, MYF(MY_WME));
4732
  error = 0;
4733

4734 4735 4736
err:
  delete lev;
  if (fd >= 0)
4737
  {
4738
    my_close(fd, MYF(0));
4739 4740
    end_io_cache(&file);
  }
4741
  return error ? error : Log_event::exec_event(rli);
4742
}
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4743

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4744
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
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4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771
/**************************************************************************
	Begin_load_query_log_event methods
**************************************************************************/

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


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


#if defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4772
int Begin_load_query_log_event::get_create_or_append() const
4773
{
4774
  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


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


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


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

  buf+= desc_event->common_header_len;

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

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

  file_id= uint4korr(buf + ELQ_FILE_ID_OFFSET);
}


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


4829
#ifndef MYSQL_CLIENT
4830 4831 4832 4833 4834 4835 4836 4837 4838 4839
bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
  char buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
  int4store(buf, file_id);
  int4store(buf + 4, fn_pos_start);
  int4store(buf + 4 + 4, fn_pos_end);
  *(buf + 4 + 4 + 4)= (char)dup_handling;
  return my_b_safe_write(file, (byte*) buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
}
4840
#endif
4841 4842 4843


#ifdef MYSQL_CLIENT
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4844
void Execute_load_query_log_event::print(FILE* file,
4845
                                         PRINT_EVENT_INFO* print_event_info)
4846
{
4847
  print(file, print_event_info, 0);
4848 4849 4850
}


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4851
void Execute_load_query_log_event::print(FILE* file,
4852
                                         PRINT_EVENT_INFO* print_event_info,
4853 4854
                                         const char *local_fname)
{
4855
  print_query_header(file, print_event_info);
4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875

  if (local_fname)
  {
    my_fwrite(file, (byte*) query, fn_pos_start, MYF(MY_NABP | MY_WME));
    fprintf(file, " LOCAL INFILE \'");
    fprintf(file, local_fname);
    fprintf(file, "\'");
    if (dup_handling == LOAD_DUP_REPLACE)
      fprintf(file, " REPLACE");
    fprintf(file, " INTO");
    my_fwrite(file, (byte*) query + fn_pos_end, q_len-fn_pos_end,
        MYF(MY_NABP | MY_WME));
    fprintf(file, ";\n");
  }
  else
  {
    my_fwrite(file, (byte*) query, q_len, MYF(MY_NABP | MY_WME));
    fprintf(file, ";\n");
  }

4876
  if (!print_event_info->short_form)
4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919
    fprintf(file, "# file_id: %d \n", file_id);
}
#endif


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


int
Execute_load_query_log_event::exec_event(struct st_relay_log_info* rli)
{
  char *p;
  char *buf;
  char *fname;
  char *fname_end;
  int error;

  /* Replace filename and LOCAL keyword in query before executing it */
  if (!(buf = my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                        (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME))))
  {
4920
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Not enough memory");
4921 4922 4923 4924 4925 4926
    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
4927
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
4928 4929
  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
4930
  *(p++)='\'';
4931
  switch (dup_handling) {
4932
  case LOAD_DUP_IGNORE:
4933
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
4934 4935
    break;
  case LOAD_DUP_REPLACE:
4936
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
4937 4938 4939 4940 4941
    break;
  default:
    /* Ordinary load data */
    break;
  }
4942
  p= strmake(p, STRING_WITH_LEN(" INTO"));
4943 4944 4945 4946 4947 4948 4949
  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

  error= Query_log_event::exec_event(rli, buf, p-buf);

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

4950 4951 4952 4953 4954 4955
  /*
    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));
4956 4957 4958 4959 4960 4961 4962

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


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monty@mashka.mysql.fi committed
4963
/**************************************************************************
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monty@narttu.mysql.fi committed
4964
	sql_ex_info methods
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monty@mashka.mysql.fi committed
4965
**************************************************************************/
4966

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monty@narttu.mysql.fi committed
4967
/*
4968
  sql_ex_info::write_data()
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monty@narttu.mysql.fi committed
4969
*/
4970

4971
bool sql_ex_info::write_data(IO_CACHE* file)
4972 4973 4974
{
  if (new_format())
  {
4975 4976 4977 4978 4979
    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) ||
4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991
	    my_b_safe_write(file,(byte*) &opt_flags,1));
  }
  else
  {
    old_sql_ex old_ex;
    old_ex.field_term= *field_term;
    old_ex.enclosed=   *enclosed;
    old_ex.line_term=  *line_term;
    old_ex.line_start= *line_start;
    old_ex.escaped=    *escaped;
    old_ex.opt_flags=  opt_flags;
    old_ex.empty_flags=empty_flags;
4992
    return my_b_safe_write(file, (byte*) &old_ex, sizeof(old_ex)) != 0;
4993 4994 4995 4996
  }
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4997
/*
4998
  sql_ex_info::init()
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monty@narttu.mysql.fi committed
4999
*/
5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013

char* sql_ex_info::init(char* buf,char* buf_end,bool use_new_format)
{
  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.
    */
5014 5015 5016 5017 5018
    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;
}
5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059


#ifdef HAVE_ROW_BASED_REPLICATION

/**************************************************************************
	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),
    m_table(tbl_arg),
    m_table_id(tid),
    m_width(tbl_arg->s->fields),
5060 5061
    m_rows_buf((byte*)my_malloc(opt_binlog_rows_event_max_size * 
      sizeof(*m_rows_buf), MYF(MY_WME))),
5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117
    m_rows_cur(m_rows_buf),
    m_rows_end(m_rows_buf + opt_binlog_rows_event_max_size),
    m_flags(0)
{
  DBUG_ASSERT(m_table && m_table->s);
  DBUG_ASSERT(m_table_id != ULONG_MAX);

  if (thd_arg->options & OPTION_NO_FOREIGN_KEY_CHECKS)
      set_flags(NO_FOREIGN_KEY_CHECKS_F);
  if (thd_arg->options & OPTION_RELAXED_UNIQUE_CHECKS)
      set_flags(RELAXED_UNIQUE_CHECKS_F);
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
                          (m_width + 7) & ~7UL,
                          false)))
    memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
  else
    m_cols.bitmap= 0; // to not free it
}
#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),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
{
  DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
  uint8 const common_header_len= description_event->common_header_len;
  uint8 const post_header_len= description_event->post_header_len[event_type-1];

  DBUG_PRINT("enter",("event_len=%ld, common_header_len=%d, "
		      "post_header_len=%d",
		      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
  {
    m_table_id= uint6korr(post_start);
    post_start+= RW_FLAGS_OFFSET;
  }

  DBUG_ASSERT(m_table_id != ULONG_MAX);

  m_flags= uint2korr(post_start);

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  byte const *const var_start= (const byte *)buf + common_header_len + 
    post_header_len;
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  byte const *const ptr_width= var_start;
  byte const *const ptr_after_width= my_vle_decode(&m_width, ptr_width);

  const uint byte_count= (m_width + 7) / 8;
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  const byte* const ptr_rows_data= var_start + byte_count + 1;
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  my_size_t const data_size= event_len - (ptr_rows_data - (const byte *) buf);
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  DBUG_PRINT("info",("m_table_id=%lu, m_flags=%d, m_width=%u, data_size=%lu",
                     m_table_id, m_flags, m_width, data_size));

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  m_rows_buf= (byte*)my_malloc(data_size, MYF(MY_WME));
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  if (likely((bool)m_rows_buf))
  {
    /* if bitmap_init fails, catched in is_valid() */
    if (likely(!bitmap_init(&m_cols,
                            m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
                            (m_width + 7) & ~7UL,
                            false)))
      memcpy(m_cols.bitmap, ptr_after_width, byte_count);
    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().
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  my_free((gptr)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
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}

#ifndef MYSQL_CLIENT
int Rows_log_event::do_add_row_data(byte *const row_data,
                                    my_size_t const length)
{
  /*
    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
  */
  DBUG_ENTER("Rows_log_event::do_add_row_data(byte *data, my_size_t length)");
  DBUG_PRINT("enter", ("row_data= %p, length= %lu", row_data, length));
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  DBUG_DUMP("row_data", (const char*)row_data, min(length, 32));
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  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
  DBUG_ASSERT(m_rows_buf <  m_rows_end);
  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
  if (static_cast<my_size_t>(m_rows_end - m_rows_cur) < length)
  {
    my_size_t const block_size= 1024;
    my_ptrdiff_t const old_alloc= m_rows_end - m_rows_buf;
    my_ptrdiff_t const new_alloc= 
        old_alloc + block_size * (length / block_size + block_size - 1);
    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;

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    byte* const new_buf= 
      (byte*)my_realloc((gptr)m_rows_buf, new_alloc, MYF(MY_WME));
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    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;
  }

  DBUG_ASSERT(m_rows_cur + length < m_rows_end);
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
/*
  Unpack a row into a record. The row is assumed to only consist of the fields
  for which the bitset represented by 'arr' and 'bits'; the other parts of the
  record are left alone.
 */
static char const *unpack_row(TABLE *table,
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                              byte *record, char const *row,
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                              MY_BITMAP const *cols)
{
  DBUG_ASSERT(record && row);

  MY_BITMAP *write_set= table->file->write_set;
  my_size_t const n_null_bytes= table->s->null_bytes;
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  my_ptrdiff_t const offset= record - (byte*) table->record[0];
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  memcpy(record, row, n_null_bytes);
  char const *ptr= row + n_null_bytes;

  bitmap_set_all(write_set);
  Field **const begin_ptr = table->field;
  for (Field **field_ptr= begin_ptr ; *field_ptr ; ++field_ptr)
  {
    Field *const f= *field_ptr;

    if (bitmap_is_set(cols, field_ptr -  begin_ptr))
    {
      /* Field...::unpack() cannot return 0 */
      ptr= f->unpack(f->ptr + offset, ptr);
    }
    else
      bitmap_clear_bit(write_set, (field_ptr - begin_ptr) + 1);
  }
  return ptr;
}

int Rows_log_event::exec_event(st_relay_log_info *rli)
{
  DBUG_ENTER("Rows_log_event::exec_event(st_relay_log_info*)");
  DBUG_ASSERT(m_table_id != ULONG_MAX);
  int error= 0;
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  char const *row_start= (char const *)m_rows_buf;
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  TABLE* table= rli->m_table_map.get_table(m_table_id);

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

  /*
    lock_tables() reads the contents of thd->lex, so they must be
    initialized, so we should call lex_start(); to be even safer, we call
    mysql_init_query() which does a more complete set of inits.
  */
  mysql_init_query(thd, NULL, 0);

  if (table)
  {
    /*
      table == NULL means that this table should not be
      replicated (this was set up by Table_map_log_event::exec_event() which
      tested replicate-* rules).
    */
    TABLE_LIST table_list;
    bool need_reopen;
    uint count= 1;
    bzero(&table_list, sizeof(table_list));
    table_list.lock_type= TL_WRITE;
    table_list.next_global= table_list.next_local= 0;
    table_list.table= table;

    for ( ; ; )
    {
      table_list.db= const_cast<char*>(table->s->db.str);
      table_list.alias= table_list.table_name=
        const_cast<char*>(table->s->table_name.str);

      if ((error= lock_tables(thd, &table_list, count, &need_reopen)) == 0)
        break;
      if (!need_reopen)
      {
        slave_print_msg(ERROR_LEVEL, rli, error,
                        "Error in %s event: error during table %s.%s lock",
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                        get_type_str(), table->s->db.str, 
                        table->s->table_name.str);
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        DBUG_RETURN(error);
      }
      /*
        we need to store a local copy of the table names since the table object
        will become invalid after close_tables_for_reopen
      */
      char *db= my_strdup(table->s->db.str, MYF(MY_WME));
      char *table_name= my_strdup(table->s->table_name.str, MYF(MY_WME));

      if (db == 0 || table_name == 0)
      {
        /*
           Since the lock_tables() failed, the table is not locked, so
           we don't need to unlock them.
        */
        DBUG_RETURN(HA_ERR_OUT_OF_MEM);
      }

      /*
        We also needs to flush the pending RBR event, since it keeps a
        pointer to an open table.  

        ALTERNATIVE SOLUTION: Extract a pointer to the pending RBR
        event and reset the table pointer after the tables has been
        reopened.
       */
      thd->binlog_flush_pending_rows_event(false);

      close_tables_for_reopen(thd, &table_list);

      /* open the table again, same as in Table_map_event::exec_event */
      table_list.db= const_cast<char*>(db);
      table_list.alias= table_list.table_name= const_cast<char*>(table_name);
      table_list.updating= 1;
      TABLE_LIST *tables= &table_list;
      if ((error= open_tables(thd, &tables, &count, 0)) == 0)
      {
        /* reset some variables for the table list*/
        table_list.updating= 0;
        /* retrieve the new table reference and update the table map */
        table= table_list.table;
        error= rli->m_table_map.set_table(m_table_id, table);
      }
      else /* error in open_tables */
      {
        if (thd->query_error || thd->is_fatal_error)
        {
          /*
            Error reporting borrowed from Query_log_event with many excessive
            simplifications (we don't honour --slave-skip-errors)
          */
          uint actual_error= thd->net.last_errno;
          slave_print_msg(ERROR_LEVEL, rli, actual_error,
                          "Error '%s' on reopening table `%s`.`%s`",
                          (actual_error ? thd->net.last_error :
                           "unexpected success or fatal error"),
                          db, table_name);
          thd->query_error= 1;
        }
      }
      my_free((char*) db, MYF(MY_ALLOW_ZERO_PTR));
      my_free((char*) table_name, MYF(MY_ALLOW_ZERO_PTR));

      if (error)
        DBUG_RETURN(error);
    }

    /*
      It's not needed to set_time() but
      1) it continues the property that "Time" in SHOW PROCESSLIST shows how
      much slave is behind
      2) it will be needed when we allow replication from a table with no
      TIMESTAMP column to a table with one.
      So we call set_time(), like in SBR. Presently it changes nothing.
    */
    thd->set_time((time_t)when);
    /*
      There are a few flags that are replicated with each row event.
      Make sure to set/clear them before executing the main body of
      the event.
    */
    if (get_flags(NO_FOREIGN_KEY_CHECKS_F))
        thd->options|= OPTION_NO_FOREIGN_KEY_CHECKS;
    else
        thd->options&= ~OPTION_NO_FOREIGN_KEY_CHECKS;

    if (get_flags(RELAXED_UNIQUE_CHECKS_F))
        thd->options|= OPTION_RELAXED_UNIQUE_CHECKS;
    else
        thd->options&= ~OPTION_RELAXED_UNIQUE_CHECKS;
    /* A small test to verify that objects have consistent types */
    DBUG_ASSERT(sizeof(thd->options) == sizeof(OPTION_RELAXED_UNIQUE_CHECKS));

    error= do_before_row_operations(table);
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    while (error == 0 && row_start < (const char*)m_rows_end) {
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      char const *row_end= do_prepare_row(thd, table, row_start);
      DBUG_ASSERT(row_end != NULL); // cannot happen
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      DBUG_ASSERT(row_end <= (const char*)m_rows_end);
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      /* in_use can have been set to NULL in close_tables_for_reopen */
      THD* old_thd= table->in_use;
      if (!table->in_use)
        table->in_use= thd;
      error= do_exec_row(table);
      table->in_use = old_thd;
      switch (error)
      {
        /* Some recoverable errors */
      case HA_ERR_RECORD_CHANGED:
      case HA_ERR_KEY_NOT_FOUND:	/* Idempotency support: OK if
                                           tuple does not exist */
	error= 0;
      case 0:
	break;

      default:
	slave_print_msg(ERROR_LEVEL, rli, error,
                        "Error in %s event: row application failed",
                        get_type_str());
	thd->query_error= 1;
	break;
      }

      row_start= row_end;
    }
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
                    rli->abort_slave=1;);
    error= do_after_row_operations(table, error);
    if (!cache_stmt)
      thd->options|= OPTION_STATUS_NO_TRANS_UPDATE;
    
  }

  if (error)
  {                     /* error has occured during the transaction */
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    slave_print_msg(ERROR_LEVEL, rli, error,
                    "Error in %s event: error during transaction execution "
                    "on table %s.%s",
                    get_type_str(), table->s->db.str, 
                    table->s->table_name.str);
     /*
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      If one day we honour --skip-slave-errors in row-based replication, and
      the error should be skipped, then we would clear mappings, rollback,
      close tables, but the slave SQL thread would not stop and then may
      assume the mapping is still available, the tables are still open...
      So then we should clear mappings/rollback/close here only if this is a
      STMT_END_F.
      For now we code, knowing that error is not skippable and so slave SQL
      thread is certainly going to stop.
    */
    rli->cleanup_context(thd, 1);
    thd->query_error= 1;
    DBUG_RETURN(error);
  }

  if (get_flags(STMT_END_F))
  {
    /*
      This is the end of a statement or transaction, so close (and
      unlock) the tables we opened when processing the
      Table_map_log_event starting the statement.

      OBSERVER.  This will clear *all* mappings, not only those that
      are open for the table. There is not good handle for on-close
      actions for tables.

      NOTE. Even if we have no table ('table' == 0) we still need to be
      here, so that we increase the group relay log position. If we didn't, we
      could have a group relay log position which lags behind "forever"
      (assume the last master's transaction is ignored by the slave because of
      replicate-ignore rules).
    */
    thd->binlog_flush_pending_rows_event(true);
    /*
      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);
    /*
      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.
    */

    rli->cleanup_context(thd, 0);
    rli->transaction_end(thd);

    if (error == 0)
    {
      /*
        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();
      error= Log_event::exec_event(rli);
    }
    else
      slave_print_msg(ERROR_LEVEL, rli, error,
                      "Error in %s event: commit of row events failed, "
                      "table `%s`.`%s`",
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                      get_type_str(), table->s->db.str, 
                      table->s->table_name.str);
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    DBUG_RETURN(error);
  }

  if (table)
  {
    /*
      As "table" is not NULL, we did a successful lock_tables(), without any
      prior LOCK TABLES and are not in prelocked mode, so this assertion should
      be true.
    */
    DBUG_ASSERT(thd->lock);
    /*
      If we are here, there are more events to come which may use our mappings
      and our table. So don't clear mappings or close tables, just unlock
      tables.
      Why don't we lock the table once for all in
      Table_map_log_event::exec_event() ? Because we could have in binlog:
      BEGIN;
      Table_map t1 -> 1
      Write_rows to id 1
      Table_map t2 -> 2
      Write_rows to id 2
      Xid_log_event
      So we cannot lock t1 when executing the first Table_map, because at that
      moment we don't know we'll also have to lock t2, and all tables must be
      locked at once in MySQL.
    */
    mysql_unlock_tables(thd, thd->lock);
    thd->lock= 0;
    if ((table->s->primary_key == MAX_KEY) &&
        !cache_stmt)
    {
      /*
        ------------ Temporary fix until WL#2975 is implemented ---------
        This event is not the last one (no STMT_END_F). If we stop now (in
        case of terminate_slave_thread()), how will we restart? We have to
        restart from Table_map_log_event, but as this table is not
        transactional, the rows already inserted will still be present, and
        idempotency is not guaranteed (no PK) so we risk that repeating leads
        to double insert. So we desperately try to continue, hope we'll
        eventually leave this buggy situation (by executing the final
        Rows_log_event). If we are in a hopeless wait (reached end of last
        relay log and nothing gets appended there), we timeout after one
        minute, and notify DBA about the problem.
        When WL#2975 is implemented, just remove the member
        st_relay_log_info::unsafe_to_stop_at and all its occurences.
      */
      rli->unsafe_to_stop_at= time(0);
    }
  }

  DBUG_ASSERT(error == 0);
  thd->clear_error();
  rli->inc_event_relay_log_pos();
  
  DBUG_RETURN(0);
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
  DBUG_ASSERT(m_table_id != ULONG_MAX);
  byte buf[ROWS_HEADER_LEN];	// No need to init the buffer
  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.
  */
  byte sbuf[my_vle_sizeof(m_width)];
  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;

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  char *const sbuf_end= (char *const)my_vle_encode(sbuf, sizeof(sbuf), m_width);
  DBUG_ASSERT(static_cast<my_size_t>(sbuf_end - (char *const)sbuf) <= sizeof(sbuf));
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  return (my_b_safe_write(file, sbuf, sbuf_end - (char *const)sbuf) ||
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          my_b_safe_write(file, reinterpret_cast<byte*>(m_cols.bitmap),
                          no_bytes_in_map(&m_cols)) ||
          my_b_safe_write(file, m_rows_buf, data_size));
}
#endif

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) && defined(DBUG_RBR)
void Rows_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
    char const *const flagstr= get_flags(STMT_END_F) ? "STMT_END_F" : "";
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    char const *const dbnam= m_table->s->db.str;
    char const *const tblnam= m_table->s->table_name.str;
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    my_size_t bytes= snprintf(buf, sizeof(buf),
                              "%s.%s - %s", dbnam, tblnam, flagstr);
    protocol->store(buf, bytes, &my_charset_bin);
}
#endif

/**************************************************************************
	Table_map_log_event member functions
**************************************************************************/

/*
  Constructor used to build an event for writing to the binary log.
  Mats says tbl->s lives longer than this event so it's ok to copy pointers
  (tbl->s->db etc) and not pointer content.
 */
#if !defined(MYSQL_CLIENT)
Table_map_log_event::Table_map_log_event(THD *thd, TABLE *tbl, ulong tid,
                                         bool is_transactional, uint16 flags)
  : Log_event(thd, 0, is_transactional),
    m_table(tbl),
    m_dbnam(tbl->s->db.str),
    m_dblen(m_dbnam ? tbl->s->db.length : 0),
    m_tblnam(tbl->s->table_name.str),
    m_tbllen(tbl->s->table_name.length),
    m_colcnt(tbl->s->fields), m_coltype(0),
    m_table_id(tid),
    m_flags(flags)
{
  DBUG_ASSERT(m_table_id != ULONG_MAX);
  /*
    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;
  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;)
  m_data_size+= m_dblen + 2;	// Include length and terminating \0
  m_data_size+= m_tbllen + 2;	// Include length and terminating \0
  m_data_size+= 1 + m_colcnt;	// COLCNT and column types

  /* If malloc fails, catched in is_valid() */
  if ((m_memory= my_malloc(m_colcnt, MYF(MY_WME))))
  {
    m_coltype= reinterpret_cast<unsigned char*>(m_memory);
    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
}
#endif /* !defined(MYSQL_CLIENT) */

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

  : Log_event(buf, description_event),
#ifndef MYSQL_CLIENT
  m_table(NULL),
#endif
  m_memory(NULL)
{
  DBUG_ENTER("Table_map_log_event::Table_map_log_event(const char*,uint,...)");

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

  DBUG_DUMP("event buffer", buf, event_len);

  /* 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);
    m_table_id= uint6korr(post_start);
    post_start+= TM_FLAGS_OFFSET;
  }

  DBUG_ASSERT(m_table_id != ULONG_MAX);

  m_flags= uint2korr(post_start);

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

  /* Extract the length of the various parts from the buffer */
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  byte const* const ptr_dblen= (byte const*)vpart + 0;
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  m_dblen= *(unsigned char*) ptr_dblen;

  /* Length of database name + counter + terminating null */
  byte const* const ptr_tbllen= ptr_dblen + m_dblen + 2;
  m_tbllen= *(unsigned char*) ptr_tbllen;

  /* Length of table name + counter + terminating null */
  byte const* const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
  byte const* const ptr_after_colcnt= my_vle_decode(&m_colcnt, ptr_colcnt);

  DBUG_PRINT("info",("m_dblen=%d off=%d m_tbllen=%d off=%d m_colcnt=%d off=%d",
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                     m_dblen, ptr_dblen-(const byte*)vpart, 
                     m_tbllen, ptr_tbllen-(const byte*)vpart,
                     m_colcnt, ptr_colcnt-(const byte*)vpart));
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  /* Allocate mem for all fields in one go. If fails, catched in is_valid() */
  m_memory= my_multi_malloc(MYF(MY_WME),
			    &m_dbnam, m_dblen + 1,
			    &m_tblnam, m_tbllen + 1,
			    &m_coltype, m_colcnt,
			    NULL);

  if (m_memory)
  {
    /* Copy the different parts into their memory */
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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);
  }

  DBUG_VOID_RETURN;
}
#endif

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

/*
  Find a table based on database name and table name.

  DESCRIPTION

    Currently, only the first table of the 'table_list' is located. If the
    table is found in the list of open tables for the thread, the 'table'
    field of 'table_list' is filled in.

  PARAMETERS

    thd        Thread structure
    table_list List of tables to locate in the thd->open_tables list.
    count      Pointer to a variable that will be set to the number of
               tables found. If the pointer is NULL, nothing will be stored.

  RETURN VALUE

    The number of tables found.

  TO DO

    Replace the list of table searches with a hash based on the combined
    database and table name.  The handler_tables_hash is inappropriate since
    it hashes on the table alias.  At the same time, the function can be
    extended to handle a full list of table names, in the same spirit as
    open_tables() and lock_tables().
*/
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
static uint find_tables(THD *thd, TABLE_LIST *table_list, uint *count)
{
  uint result= 0;

  /* we verify that the caller knows our limitation */
  DBUG_ASSERT(table_list->next_global == 0);
  for (TABLE *table= thd->open_tables; table ; table= table->next)
  {
    if (strcmp(table->s->db.str, table_list->db) == 0
	&& strcmp(table->s->table_name.str, table_list->table_name) == 0)
    {
      /* Copy the table pointer into the table list. */
      table_list->table= table;
      result= 1;
      break;
    }
  }

  if (count)
    *count= result;
  return result;
}
#endif

/*
  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)
int Table_map_log_event::exec_event(st_relay_log_info *rli)
{
  DBUG_ENTER("Table_map_log_event::exec_event(st_relay_log_info*)");

  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);

  TABLE_LIST table_list;
  uint32 dummy_len;
  bzero(&table_list, sizeof(table_list));
  table_list.db= const_cast<char *>
    (rpl_filter->get_rewrite_db(m_dbnam, &dummy_len));
  table_list.alias= table_list.table_name= const_cast<char*>(m_tblnam);
  table_list.lock_type= TL_WRITE;
  table_list.next_global= table_list.next_local= 0;
  table_list.updating= 1;

  int error= 0;

  if (rpl_filter->db_ok(table_list.db) &&
      (!rpl_filter->is_on() || rpl_filter->tables_ok("", &table_list)))
  {
    /*
      Check if the slave is set to use SBR.  If so, the slave should
      stop immediately since it is not possible to daisy-chain from
      RBR to SBR.  Once RBR is used, the rest of the chain has to use
      RBR.
    */
    if (mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG) &&
        !binlog_row_based)
    {
      slave_print_msg(ERROR_LEVEL, rli, ER_BINLOG_ROW_RBR_TO_SBR,
                      "It is not possible to use statement-based binlogging "
                      "on a slave that replicates row-based.  Please use "
                      "--binrow-format=row on slave if you want to use "
                      "--log-slave-updates and read row-based binlog events.");
      DBUG_RETURN(ERR_RBR_TO_SBR);
    }

    /*
      Open the table if it is not already open and add the table to table map.
      If the table should not be replicated, we don't bother to do anything.
      The table map will return NULL and the row-level event will effectively
      be a no-op.
    */
    uint count;
    if (find_tables(thd, &table_list, &count) == 0)
    {
      /*
        open_tables() reads the contents of thd->lex, so they must be
        initialized, so we should call lex_start(); to be even safer, we call
        mysql_init_query() which does a more complete set of inits.
      */
      mysql_init_query(thd, NULL, 0);
      TABLE_LIST *tables= &table_list;
      if ((error= open_tables(thd, &tables, &count, 0)))
      {
        if (thd->query_error || thd->is_fatal_error)
        {
          /*
            Error reporting borrowed from Query_log_event with many excessive
            simplifications (we don't honour --slave-skip-errors)
          */
          uint actual_error= thd->net.last_errno;
          slave_print_msg(ERROR_LEVEL, rli, actual_error,
                          "Error '%s' on opening table `%s`.`%s`",
                          (actual_error ? thd->net.last_error :
                           "unexpected success or fatal error"),
                          table_list.db, table_list.table_name);
          thd->query_error= 1;
        }
        DBUG_RETURN(error);
      }
    }

    m_table= table_list.table;

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

    /*
      Check that the number of columns and the field types in the
      event match the number of columns and field types in the opened
      table.
     */
    uint col= m_table->s->fields;

    if (col == m_colcnt)
    {
      while (col-- > 0)
        if (m_table->field[col]->type() != m_coltype[col])
          break;
    }

    TABLE_SHARE const *const tsh= m_table->s;

    /*
      Check the following termination conditions:

      (col == m_table->s->fields)
          ==> (m_table->s->fields != m_colcnt)
      (0 <= col < m_table->s->fields)
          ==> (m_table->field[col]->type() != m_coltype[col])

      Logically, A ==> B is equivalent to !A || B

      Since col is unsigned, is suffices to check that col <=
      tsh->fields.  If col wrapped (by decreasing col when it is 0),
      the number will be UINT_MAX, which is greater than tsh->fields.
    */
    DBUG_ASSERT(!(col == tsh->fields) || tsh->fields != m_colcnt);
    DBUG_ASSERT(!(col < tsh->fields) ||
                (m_table->field[col]->type() != m_coltype[col]));

    if (col <= tsh->fields)
    {
      /*
        If we get here, the number of columns in the event didn't
        match the number of columns in the table on the slave, *or*
        there were a column in the table on the slave that did not
        have the same type as given in the event.

        If 'col' has the value that was assigned to it, it was a
        mismatch between the number of columns on the master and the
        slave.
       */
      if (col == tsh->fields)
      {
        DBUG_ASSERT(tsh->db.str && tsh->table_name.str);
        slave_print_msg(ERROR_LEVEL, rli, ER_BINLOG_ROW_WRONG_TABLE_DEF,
                        "Table width mismatch - "
                        "received %u columns, %s.%s has %u columns",
                        m_colcnt, tsh->db.str, tsh->table_name.str, tsh->fields);
      }
      else
      {
        DBUG_ASSERT(col < m_colcnt && col < tsh->fields);
        DBUG_ASSERT(tsh->db.str && tsh->table_name.str);
        slave_print_msg(ERROR_LEVEL, rli, ER_BINLOG_ROW_WRONG_TABLE_DEF,
                        "Column %d type mismatch - "
                        "received type %d, %s.%s has type %d",
                        col, m_coltype[col], tsh->db.str, tsh->table_name.str,
                        m_table->field[col]->type());
      }

      thd->query_error= 1;
      DBUG_RETURN(ERR_BAD_TABLE_DEF);
    }

    /*
      We record in the slave's information that the number m_table_id is
      mapped to the m_table object
    */
    if (!error)
      error= rli->m_table_map.set_table(m_table_id, m_table);

    /*
      Tell the RLI that we are touching a table.

      TODO: Maybe we can combine this with the previous operation?
    */
    if (!error)
        rli->touching_table(m_dbnam, m_tblnam, m_table_id);
  }

  /*
    We explicitly do not call Log_event::exec_event() here since we do not
    want the relay log position to be flushed to disk. The flushing will be
    done by the last Rows_log_event that either ends a statement (outside a
    transaction) or a transaction.

    A table map event can *never* end a transaction or a statement, so we
    just step the relay log position.
  */

  if (likely(!error))
    rli->inc_event_relay_log_pos();

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

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
  DBUG_ASSERT(m_table_id != ULONG_MAX);
  byte buf[TABLE_MAP_HEADER_LEN];
  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + TM_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + TM_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, TABLE_MAP_HEADER_LEN));
}

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

  byte const dbuf[]= { m_dblen };
  byte const tbuf[]= { m_tbllen };

  byte cbuf[my_vle_sizeof(m_colcnt)];
  byte *const cbuf_end= my_vle_encode(cbuf, sizeof(cbuf), m_colcnt);
  DBUG_ASSERT(static_cast<my_size_t>(cbuf_end - cbuf) <= sizeof(cbuf));

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  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
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          my_b_safe_write(file, (const byte*)m_dbnam,   m_dblen+1) ||
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          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const byte*)m_tblnam,  m_tbllen+1) ||
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          my_b_safe_write(file, cbuf,      cbuf_end - cbuf) ||
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          my_b_safe_write(file, reinterpret_cast<byte*>(m_coltype), m_colcnt));
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 }
#endif

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

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

void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
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    my_size_t bytes= my_snprintf(buf, sizeof(buf), "%s.%s", m_dbnam, m_tblnam);
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    protocol->store(buf, bytes, &my_charset_bin);
}

#endif


#ifdef MYSQL_CLIENT
void Table_map_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info)
{
  if (!print_event_info->short_form)
  {
    print_header(file, print_event_info);
    fprintf(file, "\tTable_map: `%s`.`%s` mapped to number %lu\n",
            m_dbnam, m_tblnam, m_table_id);
    print_base64(file, print_event_info);
  }
}
#endif

/**************************************************************************
	Write_rows_log_event member functions
**************************************************************************/

/*
  Constructor used to build an event for writing to the binary log.
 */
#if !defined(MYSQL_CLIENT)
Write_rows_log_event::Write_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                           ulong tid_arg,
                                           MY_BITMAP const *cols,
                                           bool is_transactional)
  : Rows_log_event(thd_arg, tbl_arg, tid_arg, cols, is_transactional)
{
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
int Write_rows_log_event::do_before_row_operations(TABLE *table)
{
  int error= 0;

  /*
    We are using REPLACE semantics and not INSERT IGNORE semantics
    when writing rows, that is: new rows replace old rows.  We need to
    inform the storage engine that it should use this behaviour.
  */

  /* Tell the storage engine that we are using REPLACE semantics. */
  thd->lex->duplicates= DUP_REPLACE;

  /*
    Pretend we're executing a REPLACE command: this is needed for
    InnoDB and NDB Cluster since they are not (properly) checking the
    lex->duplicates flag.
  */
  thd->lex->sql_command= SQLCOM_REPLACE;

tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
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  table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);  // Needed for ndbcluster
  table->file->extra(HA_EXTRA_IGNORE_NO_KEY);   // Needed for ndbcluster
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  /*
    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.
  */
  table->file->start_bulk_insert(0);
  /*
    We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
    any TIMESTAMP column with data from the row but instead will use
    the event's current time.
    As we replicate from TIMESTAMP to TIMESTAMP and slave has no extra
    columns, we know that all TIMESTAMP columns on slave will receive explicit
    data from the row, so TIMESTAMP_NO_AUTO_SET is ok.
    When we allow a table without TIMESTAMP to be replicated to a table having
    more columns including a TIMESTAMP column, or when we allow a TIMESTAMP
    column to be replicated into a BIGINT column and the slave's table has a
    TIMESTAMP column, then the slave's TIMESTAMP column will take its value
    from set_time() which we called earlier (consistent with SBR). And then in
    some cases we won't want TIMESTAMP_NO_AUTO_SET (will require some code to
    analyze if explicit data is provided for slave's TIMESTAMP columns).
  */
  table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
  return error;
}

int Write_rows_log_event::do_after_row_operations(TABLE *table, int error)
{
  if (error == 0)
    error= table->file->end_bulk_insert();
  return error;
}

char const *Write_rows_log_event::do_prepare_row(THD *thd, TABLE *table,
                                                 char const *row_start)
{
  char const *ptr= row_start;
  DBUG_ASSERT(table != NULL);
  /*
    This assertion actually checks that there is at least as many
    columns on the slave as on the master.
  */
  DBUG_ASSERT(table->s->fields >= m_width);
  DBUG_ASSERT(ptr);
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  ptr= unpack_row(table, (char*)table->record[0], ptr, &m_cols);
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  return ptr;
}

/*
  Check if there are more UNIQUE keys after the given key.
*/
static int
last_uniq_key(TABLE *table, uint keyno)
{
  while (++keyno < table->s->keys)
    if (table->key_info[keyno].flags & HA_NOSAME)
      return 0;
  return 1;
}

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

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

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

}


/*
  Replace the provided record in the database.

  Similar to how it is done in <code>mysql_insert()</code>, we first
  try to do a <code>ha_write_row()</code> and of that fails due to
  duplicated keys (or indices), we do an <code>ha_update_row()</code>
  or a <code>ha_delete_row()</code> instead.

  @param thd    Thread context for writing the record.
  @param table  Table to which record should be written.

  @return Error code on failure, 0 on success.
 */
static int
replace_record(THD *thd, TABLE *table)
{
  DBUG_ASSERT(table != NULL && thd != NULL);

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

  while ((error= table->file->ha_write_row(table->record[0])))
  {
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
      /* We failed to retrieve the duplicate key */
      return HA_ERR_FOUND_DUPP_KEY;
    }

    /*
       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.
     */
    if (table->file->table_flags() & HA_DUPP_POS)
    {
      error= table->file->rnd_pos(table->record[1], table->file->dupp_ref);
      if (error)
        return error;
    }
    else
    {
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
        return my_errno;
      }

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

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      key_copy((byte*)key.get(), table->record[0], table->key_info + keynum, 0);
      error= table->file->index_read_idx(table->record[1], keynum, 
                                         (const byte*)key.get(),
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                                         table->key_info[keynum].key_length,
                                         HA_READ_KEY_EXACT);
      if (error)
        return error;
    }

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

       REPLACE is defined as either INSERT or DELETE + INSERT.  If
       possible, we can replace it with an UPDATE, but that will not
       work on InnoDB if FOREIGN KEY checks are necessary.

       I (Matz) am not sure of the reason for the last_uniq_key()
       check as, but I'm guessing that it's something along the
       following lines.

       Suppose that we got the duplicate key to be a key that is not
       the last unique key for the table and we perform an update:
       then there might be another key for which the unique check will
       fail, so we're better off just deleting the row and inserting
       the correct row.
     */
    if (last_uniq_key(table, keynum) &&
        !table->file->referenced_by_foreign_key())
    {
      error=table->file->ha_update_row(table->record[1],
                                       table->record[0]);
      return error;
    }
    else
    {
      if ((error= table->file->ha_delete_row(table->record[1])))
        return error;
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
  return error;
}

int Write_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);
  int error= replace_record(thd, table);
  return error;
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifdef MYSQL_CLIENT
void Write_rows_log_event::print(FILE *file, PRINT_EVENT_INFO* print_event_info)
{
  if (!print_event_info->short_form)
  {
    print_header(file, print_event_info);
    fprintf(file, "\tWrite_rows: table id %lu", m_table_id);
    print_base64(file, print_event_info);
  }
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
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static int record_compare(TABLE *table, char const *a, char const *b)
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{
  for (my_size_t i= 0 ; i < table->s->fields ; ++i)
  {
    uint const off= table->field[i]->offset();
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    uint const res= table->field[i]->cmp_binary(a + off, 
                                                b + off);
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    if (res != 0) {
      return res;
    }
  }
  return 0;
}


/*
  Find the row given by 'key', if the table has keys, or else use a table scan
  to find (and fetch) the row.  If the engine allows random access of the
  records, a combination of position() and rnd_pos() will be used.

  The 'record_buf' will be used as buffer for records while locating the
  correct row.
 */
static int find_and_fetch_row(TABLE *table, byte *key, byte *record_buf)
{
  DBUG_ENTER("find_and_fetch_row(TABLE *table, byte *key, byte *record)");
  DBUG_PRINT("enter", ("table=%p, key=%p, record=%p",
		       table, key, record_buf));

  DBUG_ASSERT(table->in_use != NULL);

  if ((table->file->table_flags() & HA_PRIMARY_KEY_ALLOW_RANDOM_ACCESS)
      && table->s->primary_key < MAX_KEY)
  {
    /*
      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
      the "cursor" at the correct row.
    */
    table->file->position(table->record[0]);
    DBUG_RETURN(table->file->rnd_pos(table->record[0], table->file->ref));
  }

  DBUG_ASSERT(record_buf);

tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
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  /* We need to retrieve all fields */
  table->file->ha_set_all_bits_in_read_set();

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  if (table->s->keys > 0)
  {
    int error;
    if ((error= table->file->index_read_idx(record_buf, 0, key,
                                            table->key_info->key_length,
                                            HA_READ_KEY_EXACT)))
    {
      table->file->print_error(error, MYF(0));
      DBUG_RETURN(error);
    }

    /*
      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.
     */
    if (table->key_info->flags & HA_NOSAME)
      DBUG_RETURN(0);

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    while (record_compare(table, (const char*)table->record[0], (const char*)record_buf) != 0)
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    {
      int error;
      if ((error= table->file->index_next(record_buf)))
      {
	table->file->print_error(error, MYF(0));
	DBUG_RETURN(error);
      }
    }
  }
  else
  {
    /* Continue until we find the right record or have made a full loop */
    int restart_count= 0; // Number of times scanning has restarted from top
    int error= 0;
    do
    {
      error= table->file->rnd_next(record_buf);
      switch (error)
      {
      case 0:
      case HA_ERR_RECORD_DELETED:
	break;

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

      default:
	table->file->print_error(error, MYF(0));
	DBUG_RETURN(error);
      }
    }
    while (restart_count < 2 &&
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           record_compare(table, (const char*)table->record[0], 
                          (const char*)record_buf) != 0);
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    DBUG_ASSERT(error == HA_ERR_END_OF_FILE || error == 0);
    DBUG_RETURN(error);
  }

  DBUG_RETURN(0);
}
#endif

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

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

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

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

  if ((table->file->table_flags() & HA_PRIMARY_KEY_ALLOW_RANDOM_ACCESS) &&
      table->s->primary_key < MAX_KEY)
  {
    /*
      We don't need to allocate any memory for m_search_record and
      m_key since they are not used.
    */
    return 0;
  }

  int error= 0;

  if (table->s->keys > 0)
  {
    m_memory=
      my_multi_malloc(MYF(MY_WME),
		      &m_search_record, table->s->reclength,
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
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    m_search_record= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_search_record;
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    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  if (table->s->keys > 0)
  {
    /* We have a key: search the table using the index */
    if (!table->file->inited)
      error= table->file->ha_index_init(0, FALSE);
  }
  else
  {
    /* We doesn't have a key: search the table using rnd_next() */
    error= table->file->ha_rnd_init(1);
  }

  return error;
}

int Delete_rows_log_event::do_after_row_operations(TABLE *table, int error)
{
  /*error= ToDo:find out what this should really be, this triggers close_scan in nbd, returning error?*/
  table->file->ha_index_or_rnd_end();
  my_free(m_memory, MYF(MY_ALLOW_ZERO_PTR)); // Free for multi_malloc
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  m_memory= NULL;
  m_search_record= NULL;
  m_key= NULL;
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  return error;
}

char const *Delete_rows_log_event::do_prepare_row(THD *thd, TABLE *table,
                                                  char const *row_start)
{
  char const *ptr= row_start;
  DBUG_ASSERT(ptr);
  /*
    This assertion actually checks that there is at least as many
    columns on the slave as on the master.
  */
  DBUG_ASSERT(table->s->fields >= m_width);

  DBUG_ASSERT(ptr != NULL);
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  ptr= unpack_row(table, table->record[0], ptr, &m_cols);
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  /*
    If we will access rows using the random access method, m_key will
    be set to NULL, so we do not need to make a key copy in that case.
   */
  if (m_key)
  {
    KEY *const key_info= table->key_info;

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

  return ptr;
}

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

  int error= find_and_fetch_row(table, m_key, m_search_record);
  if (error)
    return error;

  /*
     Now we should have the right row to delete.  We are using
     record[0] since it is guaranteed to point to a record with the
     correct value.
  */
  error= table->file->ha_delete_row(table->record[0]);

  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)
{
  if (!print_event_info->short_form)
  {
    print_header(file, print_event_info);
    fprintf(file, "\tDelete_rows: table id %lu", m_table_id);
    print_base64(file, print_event_info);
  }
}
#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,
                                             ulong tid, MY_BITMAP const *cols,
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)
#endif
{
}
#endif /* !defined(MYSQL_CLIENT) */

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

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

  if ((table->file->table_flags() & HA_PRIMARY_KEY_ALLOW_RANDOM_ACCESS) &&
      table->s->primary_key < MAX_KEY)
  {
    /*
      We don't need to allocate any memory for m_search_record and
      m_key since they are not used.
    */
    return 0;
  }

  int error= 0;

  if (table->s->keys > 0)
  {
    m_memory=
      my_multi_malloc(MYF(MY_WME),
		      &m_search_record, table->s->reclength,
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
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    m_search_record= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_search_record;
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    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  if (table->s->keys > 0)
  {
    /* We have a key: search the table using the index */
    if (!table->file->inited)
      error= table->file->ha_index_init(0, FALSE);
  }
  else
  {
    /* We doesn't have a key: search the table using rnd_next() */
    error= table->file->ha_rnd_init(1);
  }
  table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;

  return error;
}

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

char const *Update_rows_log_event::do_prepare_row(THD *thd, TABLE *table,
                                                  char const *row_start)
{
  char const *ptr= row_start;
  DBUG_ASSERT(ptr);
  /*
    This assertion actually checks that there is at least as many
    columns on the slave as on the master.
  */
  DBUG_ASSERT(table->s->fields >= m_width);

  /* record[0] is the before image for the update */
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  ptr= unpack_row(table, table->record[0], ptr, &m_cols);
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  DBUG_ASSERT(ptr != NULL);
  /* record[1] is the after image for the update */
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  ptr= unpack_row(table, table->record[1], ptr, &m_cols);
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  /*
    If we will access rows using the random access method, m_key will
    be set to NULL, so we do not need to make a key copy in that case.
   */
  if (m_key)
  {
    KEY *const key_info= table->key_info;

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

  return ptr;
}

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

  int error= find_and_fetch_row(table, m_key, m_search_record);
  if (error)
    return error;

  /*
    Now we should have the right row to update.  The record that has
    been fetched is guaranteed to be in record[0], so we use that.
  */
  error= table->file->ha_update_row(table->record[0], table->record[1]);

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

#ifdef MYSQL_CLIENT
void Update_rows_log_event::print(FILE *file,
				  PRINT_EVENT_INFO* print_event_info)
{
  if (!print_event_info->short_form)
  {
    print_header(file, print_event_info);
    fprintf(file, "\tUpdate_rows: table id %lu", m_table_id);
    print_base64(file, print_event_info);
  }
}
#endif

#endif /* defined(HAVE_ROW_BASED_REPLICATION) */