log_event.cc 209 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;
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    default:
      /* That's why you must write status vars in growing order of code */
      DBUG_PRINT("info",("Query_log_event has unknown status vars (first has\
 code: %u), skipping the rest of them", (uint) *(pos-1)));
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 +
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                                            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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{
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));
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  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"SET @@session.pseudo_thread_id=%lu;\n",(ulong)thread_id);
1533

1534
  /*
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    If flags2_inited==0, this is an event from 3.23 or 4.0; nothing to
    print (remember we don't produce mixed relay logs so there cannot be
    5.0 events before that one so there is nothing to reset).
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
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
        fprintf(file, "/*!\\C %s */;\n", cs_info->csname); /* for mysql client */
      }
1618 1619 1620 1621 1622 1623 1624 1625
      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));
1626
      memcpy(print_event_info->charset, charset, 6);
1627 1628
    }
  }
1629 1630
  if (time_zone_len)
  {
1631
    if (bcmp(print_event_info->time_zone_str, time_zone_str, time_zone_len+1))
1632 1633
    {
      fprintf(file,"SET @@session.time_zone='%s';\n", time_zone_str);
1634
      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
1635 1636
    }
  }
1637 1638
}

1639

1640
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
1641
{
1642
  print_query_header(file, print_event_info);
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1643
  my_fwrite(file, (byte*) query, q_len, MYF(MY_NABP | MY_WME));
1644
  fputs(";\n", file);
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1645
}
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1646
#endif /* MYSQL_CLIENT */
1647

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1648

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1649
/*
1650
  Query_log_event::exec_event()
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1651
*/
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1652

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SCRUM  
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1653
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1654
int Query_log_event::exec_event(struct st_relay_log_info* rli)
1655 1656 1657 1658 1659 1660
{
  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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1661
{
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1662
  int expected_error,actual_error= 0;
1663 1664 1665 1666 1667 1668
  /*
    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.
  */
1669
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
1670
  thd->db_length= db_len;
1671
  thd->db= (char *) rpl_filter->get_rewrite_db(db, &thd->db_length);
1672 1673
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1674

1675
  /*
1676 1677 1678 1679 1680 1681 1682 1683
    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.
1684
  */
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1685
  rli->future_group_master_log_pos= log_pos;
1686 1687
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

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  clear_all_errors(thd, rli);
1689
  rli->clear_tables_to_lock();
1690

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1691 1692 1693 1694 1695 1696 1697 1698 1699 1700
  /*
    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().
  */
1701
  if (rpl_filter->db_ok(thd->db))
1702 1703
  {
    thd->set_time((time_t)when);
1704 1705
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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1706
    VOID(pthread_mutex_lock(&LOCK_thread_count));
1707
    thd->query_id = next_query_id();
1708
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
1709
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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1710
    DBUG_PRINT("query",("%s",thd->query));
1711

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1712
    if (ignored_error_code((expected_error= error_code)) ||
1713
	!check_expected_error(thd,rli,expected_error))
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 1744 1745 1746 1747 1748 1749
    {
      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))))
          {
            /*
1750 1751 1752 1753
              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).
1754
            */
1755
            set_slave_thread_default_charset(thd, rli);
1756 1757 1758 1759 1760
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771
      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;
        }
      }
1772 1773

      /* Execute the query (note that we bypass dispatch_command()) */
1774
      mysql_parse(thd, thd->query, thd->query_length);
1775 1776

    }
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1777 1778
    else
    {
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1779
      /*
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1780 1781 1782 1783 1784
        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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1785
      */
1786
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
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1787 1788
        clear_all_errors(thd, rli);        /* Can ignore query */
      else
1789
      {
1790
        slave_print_msg(ERROR_LEVEL, rli, expected_error, 
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1791
                          "\
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1792
Query partially completed on the master (error on master: %d) \
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1793 1794 1795
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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1796
START SLAVE; . Query: '%s'", expected_error, thd->query);
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1797 1798 1799 1800
        thd->query_error= 1;
      }
      goto end;
    }
1801

1802 1803
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
1804
      general_log_print(thd, COM_QUERY, "%s", thd->query);
1805

1806
compare_errors:
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1807 1808

     /*
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1809 1810 1811 1812
      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",
1813
 		       expected_error, thd->net.last_errno));
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1814
    if ((expected_error != (actual_error= thd->net.last_errno)) &&
1815 1816 1817
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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1818
    {
1819 1820 1821
      slave_print_msg(ERROR_LEVEL, rli, 0,
                      "\
Query caused different errors on master and slave.     \
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1822
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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1823
Default database: '%s'. Query: '%s'",
1824 1825 1826 1827 1828
                      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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1829 1830 1831 1832 1833 1834
      thd->query_error= 1;
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
1835
 	     ignored_error_code(actual_error))
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1836 1837 1838 1839 1840 1841
    {
      DBUG_PRINT("info",("error ignored"));
      clear_all_errors(thd, rli);
    }
    /*
      Other cases: mostly we expected no error and get one.
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1842
    */
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1843 1844
    else if (thd->query_error || thd->is_fatal_error)
    {
1845 1846 1847 1848 1849
      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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1850 1851
      thd->query_error= 1;
    }
1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865

    /*
      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...
1866

1867 1868 1869 1870 1871 1872 1873
      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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1874 1875
  } /* End of if (db_ok(... */

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1876
end:
1877
  VOID(pthread_mutex_lock(&LOCK_thread_count));
1878 1879 1880 1881 1882 1883
  /*
    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
1884 1885 1886
    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.
1887 1888
  */
  thd->db= thd->catalog= 0;	        // prevent db from being freed
1889
  thd->query= 0;			// just to be sure
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1890
  thd->query_length= thd->db_length =0;
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  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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  close_thread_tables(thd);      
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  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
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  /*
    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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/*
2356
  Load_log_event::pack_info()
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*/
2358

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2360
uint Load_log_event::get_query_buffer_length()
2361
{
2362
  return
2363 2364
    5 + db_len + 3 +                        // "use DB; "
    18 + fname_len + 2 +                    // "LOAD DATA INFILE 'file''"
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    7 +					    // LOCAL
2366
    9 +                                     // " REPLACE or IGNORE "
2367
    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"
2374
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
2375
}
2376

2377 2378 2379 2380 2381 2382 2383

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)
2384
  {
2385 2386
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
2388
  }
2389

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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 '");
2398
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
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  if (sql_ex.opt_flags & REPLACE_FLAG)
2402
    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 */
2416
  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);
2422

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
2425

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
2428 2429
  if (sql_ex.line_start_len)
  {
2430
    pos= strmov(pos, " STARTING BY ");
2431
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
2432
  }
2433

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  if ((long) skip_lines > 0)
2435 2436
  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
2438 2439
    pos= strmov(pos," LINES ");    
  }
2440 2441 2442 2443

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
2445
    pos= strmov(pos, " (");
2446 2447 2448
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
2453
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
2456
    }
2457
    *pos++= ')';
2458
  }
2459

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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));
2473
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
2475

2476

2477 2478
#ifndef MYSQL_CLIENT

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2479
/*
2480
  Load_log_event::write_data_header()
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2481
*/
2482

2483
bool Load_log_event::write_data_header(IO_CACHE* file)
2484
{
2485
  char buf[LOAD_HEADER_LEN];
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2486
  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);
2492
  return my_b_safe_write(file, (byte*)buf, LOAD_HEADER_LEN) != 0;
2493
}
2494

2495

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2496
/*
2497
  Load_log_event::write_data_body()
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2498
*/
2499

2500
bool Load_log_event::write_data_body(IO_CACHE* file)
2501
{
2502 2503 2504
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
2505
  {
2506 2507 2508
    if (my_b_safe_write(file, (byte*)field_lens, num_fields) ||
	my_b_safe_write(file, (byte*)fields, field_block_len))
      return 1;
2509
  }
2510 2511 2512
  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));
2513 2514
}

2515

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2516
/*
2517
  Load_log_event::Load_log_event()
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2518
*/
2519

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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,
2523
			       enum enum_duplicates handle_dup,
2524
			       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),
2528
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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2529 2530
   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
2531
   table_name(table_name_arg ? table_name_arg : ""),
2532
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
2536
  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;
2553
    
2554
  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
2556
  if (ex->opt_enclosed)
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2557
    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
2558

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  sql_ex.empty_flags= 0;
2560

2561
  switch (handle_dup) {
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2562
  case DUP_REPLACE:
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2563
    sql_ex.opt_flags|= REPLACE_FLAG;
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    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
2568
  }
2569 2570
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
2571

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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;
2582
    
2583
  skip_lines = ex->skip_lines;
2584

2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595
  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);
2596 2597
  }

2598 2599 2600
  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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2601
#endif /* !MYSQL_CLIENT */
2602

2603

2604
/*
2605
  Load_log_event::Load_log_event()
2606

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2607 2608 2609
  NOTE
    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
2610 2611
*/

2612 2613 2614 2615
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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2618
  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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2631
  DBUG_VOID_RETURN;
2632 2633
}

2634

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2635
/*
2636
  Load_log_event::copy_log_event()
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2637
*/
2638

2639
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
2640 2641
                                   int body_offset,
                                   const Format_description_log_event *description_event)
2642
{
2643
  DBUG_ENTER("Load_log_event::copy_log_event");
2644
  uint data_len;
2645
  char* buf_end = (char*)buf + event_len;
2646 2647
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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2648
  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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2655
  if ((int) event_len < body_offset)
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2656
    DBUG_RETURN(1);
2657 2658 2659 2660
  /*
    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.
  */
2661 2662 2663
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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2664
    DBUG_RETURN(1);
2665
  
2666
  data_len = event_len - body_offset;
2667
  if (num_fields > data_len) // simple sanity check against corruption
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2668
    DBUG_RETURN(1);
2669
  for (uint i = 0; i < num_fields; i++)
2670
    field_block_len += (uint)field_lens[i] + 1;
2671

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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;
2676 2677
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
2678

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2679
  DBUG_RETURN(0);
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}


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2683
/*
2684
  Load_log_event::print()
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2685
*/
2686 2687

#ifdef MYSQL_CLIENT
2688
void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
2689
{
2690
  print(file, print_event_info, 0);
2691 2692
}

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2694
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");
2698
  if (!print_event_info->short_form)
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2699
  {
2700
    print_header(file, print_event_info);
2701
    fprintf(file, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
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	    thread_id, exec_time);
  }

2705
  bool different_db= 1;
2706
  if (db)
2707
  {
2708 2709 2710 2711 2712 2713
    /*
      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.
    */
2714
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
2715
        !commented)
2716
      memcpy(print_event_info->db, db, db_len + 1);
2717
  }
2718
  
2719
  if (db && db[0] && different_db)
2720 2721 2722
    fprintf(file, "%suse %s;\n", 
            commented ? "# " : "",
            db);
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2724 2725 2726
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"%sSET @@session.pseudo_thread_id=%lu;\n",
            commented ? "# " : "", (ulong)thread_id);
2727 2728
  fprintf(file, "%sLOAD DATA ",
          commented ? "# " : "");
2729 2730
  if (check_fname_outside_temp_buf())
    fprintf(file, "LOCAL ");
2731
  fprintf(file, "INFILE '%-*s' ", fname_len, fname);
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2733
  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 ");
  
2738
  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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2754
  if (sql_ex.line_start)
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  {
2756
    fprintf(file," STARTING BY ");
2757
    pretty_print_str(file, sql_ex.line_start, sql_ex.line_start_len);
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  }
2759 2760
  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;
2766 2767
    fprintf(file, " (");
    for (i = 0; i < num_fields; i++)
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2768
    {
2769
      if (i)
2770 2771
	fputc(',', file);
      fprintf(file, field);
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2772
	  
2773
      field += field_lens[i]  + 1;
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2774
    }
2775 2776
    fputc(')', file);
  }
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2777 2778

  fprintf(file, ";\n");
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2779
  DBUG_VOID_RETURN;
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2780
}
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2781
#endif /* MYSQL_CLIENT */
2782

2783

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2784
/*
2785
  Load_log_event::set_fields()
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2786 2787 2788 2789 2790

  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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2791
*/
2792

2793
#ifndef MYSQL_CLIENT
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2794
void Load_log_event::set_fields(const char* affected_db, 
2795 2796
				List<Item> &field_list,
                                Name_resolution_context *context)
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2797 2798
{
  uint i;
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2799
  const char* field = fields;
2800
  for (i= 0; i < num_fields; i++)
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2801
  {
2802 2803
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
2804
    field+= field_lens[i]  + 1;
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  }
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}
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2807
#endif /* !MYSQL_CLIENT */
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2808 2809


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SCRUM  
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2810
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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2811 2812
/*
  Does the data loading job when executing a LOAD DATA on the slave
2813

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2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827
  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.
2828

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2829 2830 2831 2832 2833 2834 2835
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
 
  RETURN VALUE
    0           Success                                                 
    1    	Failure
*/
2836

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2837 2838
int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli, 
			       bool use_rli_only_for_errors)
2839
{
2840
  thd->db_length= db_len;
2841
  thd->db= (char *) rpl_filter->get_rewrite_db(db, &thd->db_length);
2842
  DBUG_ASSERT(thd->query == 0);
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2843
  thd->query_length= 0;                         // Should not be needed
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2844
  thd->query_error= 0;
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2845
  clear_all_errors(thd, rli);
2846 2847 2848

  /* see Query_log_event::exec_event() and BUG#13360 */
  DBUG_ASSERT(!rli->m_table_map.count());
2849 2850 2851 2852
  /*
    Usually mysql_init_query() is called by mysql_parse(), but we need it here
    as the present method does not call mysql_parse().
  */
2853
  mysql_init_query(thd, 0, 0);
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2854
  if (!use_rli_only_for_errors)
2855
  {
2856
    /* Saved for InnoDB, see comment in Query_log_event::exec_event() */
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2857
    rli->future_group_master_log_pos= log_pos;
2858
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
2859
  }
2860 2861
 
   /*
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2862 2863 2864 2865 2866 2867 2868 2869 2870 2871
    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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2872 2873 2874 2875 2876 2877 2878 2879 2880 2881


    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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2882
  */
2883
  if (rpl_filter->db_ok(thd->db))
2884
  {
2885 2886
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
2887
    thd->query_id = next_query_id();
2888
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
2889 2890 2891 2892 2893 2894
    /*
      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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2895
    mysql_reset_errors(thd, 0);
2896 2897 2898 2899

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
    tables.db = thd->db;
2900
    tables.alias = tables.table_name = (char*) table_name;
2901
    tables.lock_type = TL_WRITE;
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2902
    tables.updating= 1;
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2903

2904
    // the table will be opened in mysql_load    
2905
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
2906 2907 2908 2909 2910 2911 2912 2913
    {
      // 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];
2914
      char *end;
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2915
      enum enum_duplicates handle_dup;
2916
      bool ignore= 0;
2917 2918
      char *load_data_query;

2919
      /*
2920 2921
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
2922
      */
2923
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
2924
      {
2925 2926 2927 2928 2929
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
2930
      }
2931 2932 2933 2934 2935 2936 2937

      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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2938
      if (sql_ex.opt_flags & REPLACE_FLAG)
2939
      {
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2940
	handle_dup= DUP_REPLACE;
2941
      }
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2942
      else if (sql_ex.opt_flags & IGNORE_FLAG)
2943 2944 2945 2946
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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monty@narttu.mysql.fi committed
2947
      else
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2948
      {
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monty@narttu.mysql.fi committed
2949
        /*
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2950
	  When replication is running fine, if it was DUP_ERROR on the
2951
          master then we could choose IGNORE here, because if DUP_ERROR
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2952
          suceeded on master, and data is identical on the master and slave,
2953
          then there should be no uniqueness errors on slave, so IGNORE is
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2954
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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2955 2956 2957
          (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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2958 2959

          If reading from net (a 3.23 master), mysql_load() will change this
2960
          to IGNORE.
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2961 2962
        */
        handle_dup= DUP_ERROR;
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2963
      }
2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
      /*
        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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2974

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monty@narttu.mysql.fi committed
2975
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
2976 2977 2978 2979 2980
      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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2981 2982 2983 2984 2985
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
2986 2987 2988 2989 2990 2991

      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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monty@mashka.mysql.fi committed
2992
      List<Item> field_list;
2993 2994
      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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2995
      thd->variables.pseudo_thread_id= thread_id;
2996
      List<Item> set_fields;
2997 2998 2999 3000 3001 3002 3003 3004 3005
      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;
      }
3006 3007 3008 3009 3010
      /*
        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,
3011
                     handle_dup, ignore, net != 0))
3012
        thd->query_error= 1;
3013
      if (thd->cuted_fields)
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monty@mashka.mysql.fi committed
3014
      {
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monty@mashka.mysql.fi committed
3015
	/* log_pos is the position of the LOAD event in the master log */
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3016 3017 3018 3019 3020 3021 3022
        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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3023
      }
3024 3025 3026
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3027 3028
  }
  else
3029 3030 3031 3032 3033 3034 3035 3036 3037
  {
    /*
      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);
  }
3038 3039

error:
3040
  thd->net.vio = 0; 
3041
  char *save_db= thd->db;
3042
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3043
  thd->db= thd->catalog= 0;
3044
  thd->query= 0;
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serg@serg.mylan committed
3045
  thd->query_length= thd->db_length= 0;
3046
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3047 3048 3049
  close_thread_tables(thd);
  if (thd->query_error)
  {
3050
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3051 3052 3053 3054 3055 3056 3057 3058 3059
    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);       
    }
3060
    slave_print_msg(ERROR_LEVEL, rli, sql_errno,"\
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monty@narttu.mysql.fi committed
3061
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3062
                    err, (char*)table_name, print_slave_db_safe(save_db));
3063
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3064 3065
    return 1;
  }
3066
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3067
	    
3068
  if (thd->is_fatal_error)
3069
  {
3070
    slave_print_msg(ERROR_LEVEL, rli, ER_UNKNOWN_ERROR, "\
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monty@mashka.mysql.fi committed
3071
Fatal error running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3072
                    (char*)table_name, print_slave_db_safe(save_db));
3073 3074 3075
    return 1;
  }

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3076
  return ( use_rli_only_for_errors ? 0 : Log_event::exec_event(rli) ); 
3077
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
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3078
#endif
3079 3080


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monty@mashka.mysql.fi committed
3081
/**************************************************************************
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monty@narttu.mysql.fi committed
3082
  Rotate_log_event methods
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monty@mashka.mysql.fi committed
3083
**************************************************************************/
3084

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3085
/*
3086
  Rotate_log_event::pack_info()
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3087
*/
3088

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SCRUM  
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3089
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3090
void Rotate_log_event::pack_info(Protocol *protocol)
3091
{
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3092
  char buf1[256], buf[22];
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3093
  String tmp(buf1, sizeof(buf1), log_cs);
3094
  tmp.length(0);
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3095
  tmp.append(new_log_ident, ident_len);
3096
  tmp.append(STRING_WITH_LEN(";pos="));
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3097 3098
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3099
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3100
#endif
3101

3102

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monty@narttu.mysql.fi committed
3103
/*
3104
  Rotate_log_event::print()
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monty@narttu.mysql.fi committed
3105
*/
3106 3107

#ifdef MYSQL_CLIENT
3108
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3109
{
3110
  char buf[22];
3111

3112
  if (print_event_info->short_form)
3113
    return;
3114
  print_header(file, print_event_info);
3115 3116 3117
  fprintf(file, "\tRotate to ");
  if (new_log_ident)
    my_fwrite(file, (byte*) new_log_ident, (uint)ident_len, 
3118
              MYF(MY_NABP | MY_WME));
3119
  fprintf(file, "  pos: %s", llstr(pos, buf));
3120
  fputc('\n', file);
3121
  fflush(file);
3122
}
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monty@mashka.mysql.fi committed
3123
#endif /* MYSQL_CLIENT */
3124 3125


3126

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monty@narttu.mysql.fi committed
3127
/*
3128
  Rotate_log_event::Rotate_log_event() (2 constructors)
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monty@narttu.mysql.fi committed
3129
*/
3130

3131 3132

#ifndef MYSQL_CLIENT
3133
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3134 3135 3136 3137 3138 3139 3140 3141
                                   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];
3142
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
3143 3144 3145 3146
  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)
3147
    new_log_ident= my_strndup((const byte*) new_log_ident_arg,
3148
                                         ident_len, MYF(MY_WME));
3149 3150 3151 3152 3153
  DBUG_VOID_RETURN;
}
#endif


3154 3155
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
3156
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3157
{
3158
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3159
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3160 3161
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3162 3163
  uint ident_offset;
  if (event_len < header_size)
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3164
    DBUG_VOID_RETURN;
3165
  buf += header_size;
3166 3167 3168 3169
  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; 
3170
  set_if_smaller(ident_len,FN_REFLEN-1);
3171
  new_log_ident= my_strndup((byte*) buf + ident_offset,
3172 3173
                                       (uint) ident_len,
                                       MYF(MY_WME));
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3174
  DBUG_VOID_RETURN;
3175
}
3176 3177


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3178
/*
3179
  Rotate_log_event::write()
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3180
*/
3181

3182
#ifndef MYSQL_CLIENT
3183
bool Rotate_log_event::write(IO_CACHE* file)
3184
{
3185
  char buf[ROTATE_HEADER_LEN];
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3186
  int8store(buf + R_POS_OFFSET, pos);
3187 3188 3189
  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));
3190
}
3191
#endif
3192

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3193
/*
3194 3195
  Rotate_log_event::exec_event()

3196
  Got a rotate log event from the master
3197

3198 3199 3200
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3201

3202
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3203
    in a A -> B -> A setup.
3204
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3205 3206 3207

  RETURN VALUES
    0	ok
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3208
*/
3209

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3210
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3211
int Rotate_log_event::exec_event(struct st_relay_log_info* rli)
3212
{
3213 3214 3215
  DBUG_ENTER("Rotate_log_event::exec_event");

  pthread_mutex_lock(&rli->data_lock);
3216
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3217 3218 3219 3220 3221 3222 3223 3224 3225
  /*
    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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3226 3227
    In that case, we don't want to touch the coordinates which correspond to
    the beginning of the transaction.
3228 3229
    Starting from 5.0.0, there also are some rotates from the slave itself, in
    the relay log.
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3230
  */
3231
  if (!(thd->options & OPTION_BEGIN))
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3232
  {
3233 3234
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3235 3236 3237 3238 3239
    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,
3240
                        (ulong) rli->group_master_log_pos));
3241
    /*
3242 3243
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3244 3245 3246 3247 3248
      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);
3249
    set_slave_thread_default_charset(thd, rli);
3250
    thd->variables.sql_mode= global_system_variables.sql_mode;
3251 3252
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3253
  }
3254 3255 3256 3257
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
  DBUG_RETURN(0);
3258
}
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3259
#endif
3260 3261


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3262
/**************************************************************************
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3263
	Intvar_log_event methods
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3264
**************************************************************************/
3265

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3266
/*
3267
  Intvar_log_event::pack_info()
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3268
*/
3269

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3270
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3271
void Intvar_log_event::pack_info(Protocol *protocol)
3272
{
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3273 3274
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3275
  *pos++= '=';
3276
  pos= longlong10_to_str(val, pos, -10);
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3277
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3278
}
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3279
#endif
3280

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3281

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3282
/*
3283
  Intvar_log_event::Intvar_log_event()
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3284
*/
3285

3286 3287 3288
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3289
{
3290 3291 3292
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3293 3294
}

3295

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3296
/*
3297
  Intvar_log_event::get_var_type_name()
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3298
*/
3299 3300

const char* Intvar_log_event::get_var_type_name()
3301
{
3302 3303 3304 3305 3306
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3307 3308
}

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3310
/*
3311
  Intvar_log_event::write()
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3312
*/
3313

3314
#ifndef MYSQL_CLIENT
3315
bool Intvar_log_event::write(IO_CACHE* file)
3316
{
3317 3318
  byte buf[9];
  buf[I_TYPE_OFFSET]= (byte) type;
3319
  int8store(buf + I_VAL_OFFSET, val);
3320 3321
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3322
}
3323
#endif
3324

3325

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3326
/*
3327
  Intvar_log_event::print()
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3328
*/
3329 3330

#ifdef MYSQL_CLIENT
3331
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3332
{
3333 3334 3335
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3336

3337
  if (!print_event_info->short_form)
3338
  {
3339
    print_header(file, print_event_info);
3340 3341
    fprintf(file, "\tIntvar\n");
  }
3342

3343 3344 3345 3346 3347 3348 3349 3350
  fprintf(file, "SET ");
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
3351 3352 3353 3354
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
3355 3356 3357
  }
  fprintf(file, "%s=%s;\n", msg, llstr(val,llbuff));
  fflush(file);
3358
}
3359
#endif
3360

3361

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3362
/*
3363
  Intvar_log_event::exec_event()
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3364
*/
3365

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3366
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3367
int Intvar_log_event::exec_event(struct st_relay_log_info* rli)
3368
{
3369 3370 3371 3372 3373 3374 3375 3376 3377
  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;
  }
3378
  rli->inc_event_relay_log_pos();
3379
  return 0;
3380
}
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3381
#endif
3382

3383

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3384
/**************************************************************************
3385
  Rand_log_event methods
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3386
**************************************************************************/
3387

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3388
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3389
void Rand_log_event::pack_info(Protocol *protocol)
3390
{
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3391 3392 3393 3394 3395
  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);
3396
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3397
}
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3398
#endif
3399 3400


3401 3402 3403
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3404
{
3405 3406 3407
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3408 3409
}

3410

3411
#ifndef MYSQL_CLIENT
3412
bool Rand_log_event::write(IO_CACHE* file)
3413
{
3414
  byte buf[16];
3415 3416
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3417 3418
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3419
}
3420
#endif
3421

3422 3423

#ifdef MYSQL_CLIENT
3424
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3425
{
3426
  char llbuff[22],llbuff2[22];
3427
  if (!print_event_info->short_form)
3428
  {
3429
    print_header(file, print_event_info);
3430
    fprintf(file, "\tRand\n");
3431
  }
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3432
  fprintf(file, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s;\n",
3433
	  llstr(seed1, llbuff),llstr(seed2, llbuff2));
3434
  fflush(file);
3435
}
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3436
#endif /* MYSQL_CLIENT */
3437

3438

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3439
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3440
int Rand_log_event::exec_event(struct st_relay_log_info* rli)
3441
{
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3442 3443
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3444
  rli->inc_event_relay_log_pos();
3445 3446
  return 0;
}
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3447
#endif /* !MYSQL_CLIENT */
3448

3449

3450 3451 3452 3453
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

3454 3455 3456 3457 3458 3459 3460 3461 3462
#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

3463 3464 3465
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3466 3467
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3468 3469 3470 3471
#if !defined(DBUG_OFF) && !defined(MYSQL_CLIENT)
  if (show_xid)
#endif
    pos= longlong10_to_str(xid, pos, 10);
3472
  pos= strmov(pos, " */");
3473 3474 3475 3476
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

3477 3478 3479 3480 3481 3482 3483 3484
/*
  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
*/
3485 3486 3487 3488

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3489 3490 3491
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3492
  memcpy((char*) &xid, buf, sizeof(xid));
3493 3494 3495
}


3496
#ifndef MYSQL_CLIENT
3497 3498 3499 3500 3501
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
         my_b_safe_write(file, (byte*) &xid, sizeof(xid));
}
3502
#endif
3503 3504 3505


#ifdef MYSQL_CLIENT
3506
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3507
{
3508
  if (!print_event_info->short_form)
3509
  {
3510 3511 3512
    char buf[64];
    longlong10_to_str(xid, buf, 10);

3513
    print_header(file, print_event_info);
3514 3515
    fprintf(file, "\tXid = %s\n", buf);
    fflush(file);
3516
  }
3517
  fprintf(file, "COMMIT;\n");
3518 3519 3520 3521 3522 3523 3524
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::exec_event(struct st_relay_log_info* rli)
{
3525
  /* For a slave Xid_log_event is COMMIT */
3526 3527
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
3528
  return end_trans(thd, COMMIT) || Log_event::exec_event(rli);
3529 3530 3531 3532
}
#endif /* !MYSQL_CLIENT */


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3533
/**************************************************************************
3534
  User_var_log_event methods
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3535
**************************************************************************/
3536

3537
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3538 3539 3540
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
3541
  uint val_offset= 4 + name_len;
3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556
  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));
3557 3558
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
3559 3560 3561 3562 3563
      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;
3564 3565 3566 3567 3568 3569 3570 3571 3572 3573
    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;
    } 
3574
    case STRING_RESULT:
3575 3576 3577 3578 3579 3580 3581 3582 3583 3584
      /* 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
      {
3585 3586 3587
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
3588 3589
        event_len= p-buf;
      }
3590
      break;
3591
    case ROW_RESULT:
3592
    default:
3593 3594 3595 3596 3597
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
3598 3599 3600 3601
  buf[1]= '`';
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
  memcpy(buf+2, name, name_len);
3602
  protocol->store(buf, event_len, &my_charset_bin);
3603 3604
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
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3605
#endif /* !MYSQL_CLIENT */
3606 3607


3608 3609 3610 3611
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3612
{
3613
  buf+= description_event->common_header_len;
3614 3615
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
3616 3617
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
3618 3619 3620
  if (is_null)
  {
    type= STRING_RESULT;
3621
    charset_number= my_charset_bin.number;
3622 3623 3624 3625 3626
    val_len= 0;
    val= 0;  
  }
  else
  {
3627 3628 3629
    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 + 
3630
		       UV_CHARSET_NUMBER_SIZE);
3631 3632
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
3633 3634 3635 3636
  }
}


3637
#ifndef MYSQL_CLIENT
3638
bool User_var_log_event::write(IO_CACHE* file)
3639 3640 3641 3642
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
3643
  char buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
3644
  uint buf1_length;
3645
  ulong event_length;
3646

3647
  int4store(buf, name_len);
3648 3649 3650 3651 3652 3653 3654
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
    val_len= 0;
  }    
  else
3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665
  {
    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;
3666 3667 3668 3669 3670 3671
    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;
3672
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
3673 3674 3675
      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
3676 3677 3678
    case STRING_RESULT:
      pos= val;
      break;
3679
    case ROW_RESULT:
3680
    default:
3681 3682 3683
      DBUG_ASSERT(1);
      return 0;
    }
3684 3685
    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
3686
  }
3687 3688 3689 3690 3691 3692

  /* 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))   ||
3693 3694 3695
	  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));
3696
}
3697
#endif
3698

3699

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3700
/*
3701
  User_var_log_event::print()
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3702
*/
3703 3704

#ifdef MYSQL_CLIENT
3705
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3706
{
3707
  if (!print_event_info->short_form)
3708
  {
3709
    print_header(file, print_event_info);
3710 3711 3712
    fprintf(file, "\tUser_var\n");
  }

3713
  fprintf(file, "SET @`");
3714
  my_fwrite(file, (byte*) name, (uint) (name_len), MYF(MY_NABP | MY_WME));
3715
  fprintf(file, "`");
3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733

  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;
3734 3735 3736 3737 3738 3739
    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
3740 3741
      decimal_digit_t dec_buf[10];
      decimal_t dec;
3742 3743 3744 3745 3746 3747
      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;
3748
      fprintf(file, ":=%s;\n",str_buf);
3749 3750
      break;
    }
3751
    case STRING_RESULT:
3752
    {
3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766
      /*
        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.
      */
3767 3768 3769 3770
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
3771
        break; // no error, as we are 'void'
3772
      str_to_hex(hex_str, val, val_len);
3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785
      /*
        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
3786
        fprintf(file, ":=_%s %s COLLATE `%s`;\n", cs->csname, hex_str, cs->name);
3787
      my_afree(hex_str);
3788
    }
3789
      break;
3790
    case ROW_RESULT:
3791
    default:
3792
      DBUG_ASSERT(1);
3793 3794 3795 3796 3797
      return;
    }
  }
  fflush(file);
}
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3798
#endif
3799

3800

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3801
/*
3802
  User_var_log_event::exec_event()
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3803
*/
3804

3805
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3806 3807 3808
int User_var_log_event::exec_event(struct st_relay_log_info* rli)
{
  Item *it= 0;
3809 3810 3811
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
3812 3813 3814
  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
3815 3816
  double real_val;
  longlong int_val;
3817 3818 3819 3820 3821 3822 3823 3824 3825 3826

  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
3827
      it= new Item_float(real_val);
3828
      val= (char*) &real_val;		// Pointer to value in native format
3829
      val_len= 8;
3830 3831
      break;
    case INT_RESULT:
3832 3833 3834
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
3835
      val_len= 8;
3836
      break;
3837 3838 3839 3840 3841 3842 3843 3844
    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;
    }
3845 3846 3847
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
3848
    case ROW_RESULT:
3849
    default:
3850 3851 3852 3853 3854
      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
3855 3856 3857 3858
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
3859
  e.fix_fields(thd, 0);
3860 3861 3862 3863 3864
  /*
    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.
   */
3865
  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT);
3866
  free_root(thd->mem_root,0);
3867

3868
  rli->inc_event_relay_log_pos();
3869 3870
  return 0;
}
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3871
#endif /* !MYSQL_CLIENT */
3872 3873


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3874
/**************************************************************************
3875
  Slave_log_event methods
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3876
**************************************************************************/
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3878
#ifdef HAVE_REPLICATION
3879
#ifdef MYSQL_CLIENT
3880
void Unknown_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3881
{
3882
  if (print_event_info->short_form)
3883
    return;
3884
  print_header(file, print_event_info);
3885 3886 3887 3888
  fputc('\n', file);
  fprintf(file, "# %s", "Unknown event\n");
}
#endif  
3889

3890
#ifndef MYSQL_CLIENT
3891
void Slave_log_event::pack_info(Protocol *protocol)
3892
{
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3893
  char buf[256+HOSTNAME_LENGTH], *pos;
3894 3895 3896 3897 3898 3899 3900
  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=");
3901
  pos= longlong10_to_str(master_pos, pos, 10);
3902
  protocol->store(buf, pos-buf, &my_charset_bin);
3903
}
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3904
#endif /* !MYSQL_CLIENT */
3905 3906 3907 3908


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
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3909
				 struct st_relay_log_info* rli)
3910
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
3911 3912 3913 3914
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
3915

3916 3917 3918 3919 3920
  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);
3921
  master_log_len = strlen(rli->group_master_log_name);
3922 3923 3924
  // 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))))
3925
  {
3926 3927 3928
    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;
3929
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
3930
    master_port = mi->port;
3931
    master_pos = rli->group_master_log_pos;
3932 3933
    DBUG_PRINT("info", ("master_log: %s  pos: %d", master_log,
			(ulong) master_pos));
3934
  }
3935 3936 3937 3938 3939 3940
  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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3941
#endif /* !MYSQL_CLIENT */
3942 3943 3944 3945 3946 3947 3948 3949 3950


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


#ifdef MYSQL_CLIENT
3951
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3952 3953
{
  char llbuff[22];
3954
  if (print_event_info->short_form)
3955
    return;
3956
  print_header(file, print_event_info);
3957
  fputc('\n', file);
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3958 3959
  fprintf(file, "\
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
3960 3961
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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3962
#endif /* MYSQL_CLIENT */
3963 3964 3965 3966 3967 3968 3969 3970


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


3971
#ifndef MYSQL_CLIENT
3972
bool Slave_log_event::write(IO_CACHE* file)
3973
{
3974
  ulong event_length= get_data_size();
3975 3976 3977
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
3978 3979 3980

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) mem_pool, event_length));
3981
}
3982
#endif
3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993


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)
3994
  {
3995 3996
    master_host = 0;
    return;
3997
  }
3998 3999
  master_log_len = strlen(master_log);
}
4000

4001

4002 4003 4004
/* 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)
4005
{
4006
  if (event_len < LOG_EVENT_HEADER_LEN)
4007
    return;
4008
  event_len -= LOG_EVENT_HEADER_LEN;
4009 4010 4011 4012 4013
  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);
4014 4015
}

4016

4017 4018 4019 4020 4021 4022 4023
#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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4024
#endif /* !MYSQL_CLIENT */
4025 4026


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4027
/**************************************************************************
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4028
	Stop_log_event methods
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4029
**************************************************************************/
4030

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4031
/*
4032
  Stop_log_event::print()
4033
*/
4034 4035

#ifdef MYSQL_CLIENT
4036
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4037
{
4038
  if (print_event_info->short_form)
4039 4040
    return;

4041
  print_header(file, print_event_info);
4042 4043
  fprintf(file, "\tStop\n");
  fflush(file);
4044
}
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4045
#endif /* MYSQL_CLIENT */
4046

4047

4048
/*
4049
  Stop_log_event::exec_event()
4050

4051
  The master stopped.
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4052
  We used to clean up all temporary tables but this is useless as, as the
4053 4054
  master has shut down properly, it has written all DROP TEMPORARY TABLE
  (prepared statements' deletion is TODO only when we binlog prep stmts).
4055 4056 4057
  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.
4058
  The place were we must do this cleaning is in Start_log_event_v3::exec_event(),
4059
  not here. Because if we come here, the master was sane.
4060 4061
*/

4062
#ifndef MYSQL_CLIENT
4063
int Stop_log_event::exec_event(struct st_relay_log_info* rli)
4064
{
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4065 4066
  /*
    We do not want to update master_log pos because we get a rotate event
4067
    before stop, so by now group_master_log_name is set to the next log.
4068
    If we updated it, we will have incorrect master coordinates and this
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4069
    could give false triggers in MASTER_POS_WAIT() that we have reached
4070
    the target position when in fact we have not.
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4071
  */
4072 4073 4074 4075 4076 4077 4078
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4079 4080
  return 0;
}
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4081
#endif /* !MYSQL_CLIENT */
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4082
#endif /* HAVE_REPLICATION */
4083

4084

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4085
/**************************************************************************
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4086
	Create_file_log_event methods
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4087
**************************************************************************/
4088 4089

/*
4090
  Create_file_log_event ctor
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4091
*/
4092 4093

#ifndef MYSQL_CLIENT
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4094 4095 4096 4097
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,
4098
                      bool ignore,
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4099
		      char* block_arg, uint block_len_arg, bool using_trans)
4100
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4101
		  using_trans),
4102
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4103
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4104
{
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4105
  DBUG_ENTER("Create_file_log_event");
4106
  sql_ex.force_new_format();
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4107
  DBUG_VOID_RETURN;
4108
}
4109

4110

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4111
/*
4112
  Create_file_log_event::write_data_body()
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4113
*/
4114

4115
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4116
{
4117 4118
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4119 4120
    return res;
  return (my_b_safe_write(file, (byte*) "", 1) ||
4121
          my_b_safe_write(file, (byte*) block, block_len));
4122 4123
}

4124

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4125
/*
4126
  Create_file_log_event::write_data_header()
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4127
*/
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4128

4129
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4130
{
4131
  bool res;
4132
  byte buf[CREATE_FILE_HEADER_LEN];
4133 4134
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4135
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4136
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4137 4138 4139
}


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4140
/*
4141
  Create_file_log_event::write_base()
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monty@narttu.mysql.fi committed
4142
*/
4143

4144
bool Create_file_log_event::write_base(IO_CACHE* file)
4145
{
4146 4147 4148 4149
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4150 4151 4152
  return res;
}

4153
#endif /* !MYSQL_CLIENT */
4154

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4155
/*
4156
  Create_file_log_event ctor
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4157
*/
4158

4159 4160 4161
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)
4162
{
4163 4164 4165 4166 4167
  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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4168
  if (!(event_buf= my_memdup((byte*) buf, len, MYF(MY_WME))) ||
4169 4170 4171 4172 4173 4174 4175
      copy_log_event(event_buf,len,
                     ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                      load_header_len + header_len :
                      (fake_base ? (header_len+load_header_len) :
                       (header_len+load_header_len) +
                       create_file_header_len)),
                     description_event))
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4176
    DBUG_VOID_RETURN;
4177
  if (description_event->binlog_version!=1)
4178
  {
4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195
    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);
4196 4197 4198 4199 4200 4201 4202 4203 4204
    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;
4205
  }
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4206
  DBUG_VOID_RETURN;
4207 4208
}

4209

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4210
/*
4211
  Create_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4212
*/
4213 4214

#ifdef MYSQL_CLIENT
4215
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
lars@mysql.com's avatar
lars@mysql.com committed
4216
				  bool enable_local)
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4217
{
4218
  if (print_event_info->short_form)
4219 4220
  {
    if (enable_local && check_fname_outside_temp_buf())
4221
      Load_log_event::print(file, print_event_info);
4222
    return;
4223 4224 4225 4226
  }

  if (enable_local)
  {
4227
    Load_log_event::print(file, print_event_info,
4228
			  !check_fname_outside_temp_buf());
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4229 4230 4231 4232 4233
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
    fprintf(file, "#"); 
4234 4235
  }

4236
  fprintf(file, " file_id: %d  block_len: %d\n", file_id, block_len);
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4237
}
4238

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4239

4240
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4241
{
4242
  print(file, print_event_info, 0);
4243
}
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monty@mashka.mysql.fi committed
4244
#endif /* MYSQL_CLIENT */
nick@mysql.com's avatar
nick@mysql.com committed
4245

4246

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4247
/*
4248
  Create_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4249
*/
4250

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SCRUM  
hf@deer.mysql.r18.ru committed
4251
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4252
void Create_file_log_event::pack_info(Protocol *protocol)
4253
{
4254 4255 4256
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
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4257
  pos= strmov(pos + db_len, ";table=");
4258
  memcpy(pos, table_name, table_name_len);
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monty@mashka.mysql.fi committed
4259
  pos= strmov(pos + table_name_len, ";file_id=");
4260 4261 4262
  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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4263
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4264
}
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monty@narttu.mysql.fi committed
4265
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4266 4267


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4268
/*
4269
  Create_file_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4270
*/
4271

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SCRUM  
hf@deer.mysql.r18.ru committed
4272
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4273
int Create_file_log_event::exec_event(struct st_relay_log_info* rli)
4274
{
4275 4276
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4277 4278 4279
  int fd = -1;
  IO_CACHE file;
  int error = 1;
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monty@hundin.mysql.fi committed
4280

4281
  bzero((char*)&file, sizeof(file));
4282 4283
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4284
  thd->proc_info= proc_info;
4285 4286 4287 4288
  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 ||
4289 4290 4291
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4292 4293
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4294 4295 4296 4297
    goto err;
  }
  
  // a trick to avoid allocating another buffer
4298 4299
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4300 4301
  if (write_base(&file))
  {
4302
    strmov(ext, ".info"); // to have it right in the error message
4303 4304 4305
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in Create_file event: could not write to file '%s'",
                    fname_buf);
4306 4307 4308 4309 4310 4311
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4312 4313 4314 4315
  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)
4316
  {
4317 4318
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4319 4320
    goto err;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4321
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4322
  {
4323 4324
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "write to '%s' failed", fname_buf);
4325 4326
    goto err;
  }
4327 4328
  error=0;					// Everything is ok

4329 4330 4331 4332 4333
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
4334
  thd->proc_info= 0;
4335
  return error ? 1 : Log_event::exec_event(rli);
4336
}
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monty@narttu.mysql.fi committed
4337
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4338

4339

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monty@mashka.mysql.fi committed
4340
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4341
	Append_block_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4342
**************************************************************************/
4343

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4344
/*
4345
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4346
*/
4347 4348

#ifndef MYSQL_CLIENT  
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4349 4350
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
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monty@mashka.mysql.fi committed
4351 4352 4353
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
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monty@narttu.mysql.fi committed
4354
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4355 4356
{
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4357
#endif
4358 4359


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4360
/*
4361
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4362
*/
4363

4364 4365 4366
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)
4367
{
4368 4369 4370 4371 4372 4373
  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
4374
    DBUG_VOID_RETURN;
4375 4376 4377
  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
4378
  DBUG_VOID_RETURN;
4379 4380 4381
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4382
/*
4383
  Append_block_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4384
*/
4385

4386
#ifndef MYSQL_CLIENT
4387
bool Append_block_log_event::write(IO_CACHE* file)
4388 4389 4390
{
  byte buf[APPEND_BLOCK_HEADER_LEN];
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4391 4392
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4393 4394
	  my_b_safe_write(file, (byte*) block, block_len));
}
4395
#endif
4396 4397


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4398
/*
4399
  Append_block_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4400
*/
4401 4402

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4403
void Append_block_log_event::print(FILE* file,
4404
				   PRINT_EVENT_INFO* print_event_info)
4405
{
4406
  if (print_event_info->short_form)
4407
    return;
4408
  print_header(file, print_event_info);
4409
  fputc('\n', file);
4410 4411
  fprintf(file, "#%s: file_id: %d  block_len: %d\n",
	  get_type_str(), file_id, block_len);
4412
}
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monty@mashka.mysql.fi committed
4413
#endif /* MYSQL_CLIENT */
4414 4415


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4416
/*
4417
  Append_block_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4418
*/
4419

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4420
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4421
void Append_block_log_event::pack_info(Protocol *protocol)
4422 4423 4424 4425 4426 4427
{
  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
4428
  protocol->store(buf, length, &my_charset_bin);
4429 4430 4431
}


4432
/*
4433
  Append_block_log_event::get_create_or_append()
4434 4435
*/

4436
int Append_block_log_event::get_create_or_append() const
4437
{
4438
  return 0; /* append to the file, fail if not exists */
4439 4440
}

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4441
/*
4442
  Append_block_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4443
*/
4444

4445
int Append_block_log_event::exec_event(struct st_relay_log_info* rli)
4446
{
4447
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
4448
  int fd;
4449
  int error = 1;
monty@mysql.com's avatar
monty@mysql.com committed
4450
  DBUG_ENTER("Append_block_log_event::exec_event");
4451

4452 4453
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
4454
  thd->proc_info= proc_info;
4455 4456 4457 4458 4459 4460 4461
  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)
    {
4462 4463 4464
      slave_print_msg(ERROR_LEVEL, rli, my_errno,
                      "Error in %s event: could not create file '%s'",
                      get_type_str(), fname);
4465 4466 4467
      goto err;
    }
  }
4468 4469
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
4470
  {
4471 4472 4473
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: could not open file '%s'",
                    get_type_str(), fname);
4474 4475
    goto err;
  }
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monty@hundin.mysql.fi committed
4476
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4477
  {
4478 4479 4480
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: write to '%s' failed",
                    get_type_str(), fname);
4481 4482 4483
    goto err;
  }
  error=0;
4484

4485 4486 4487
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
4488
  thd->proc_info= 0;
monty@mysql.com's avatar
monty@mysql.com committed
4489
  DBUG_RETURN(error ? error : Log_event::exec_event(rli));
4490
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4491
#endif
4492 4493


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monty@mashka.mysql.fi committed
4494
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4495
	Delete_file_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4496
**************************************************************************/
4497

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4498
/*
4499
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4500
*/
4501 4502

#ifndef MYSQL_CLIENT
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monty@narttu.mysql.fi committed
4503 4504 4505
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)
4506 4507
{
}
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monty@narttu.mysql.fi committed
4508
#endif
4509

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monty@narttu.mysql.fi committed
4510
/*
4511
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4512
*/
4513

4514 4515 4516
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)
4517
{
4518 4519 4520
  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))
4521
    return;
4522
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
4523 4524 4525
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4526
/*
4527
  Delete_file_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4528
*/
4529

4530
#ifndef MYSQL_CLIENT
4531
bool Delete_file_log_event::write(IO_CACHE* file)
4532 4533 4534
{
 byte buf[DELETE_FILE_HEADER_LEN];
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
4535 4536
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
4537
}
4538
#endif
4539 4540


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4541
/*
4542
  Delete_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4543
*/
4544 4545

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4546
void Delete_file_log_event::print(FILE* file,
4547
				  PRINT_EVENT_INFO* print_event_info)
4548
{
4549
  if (print_event_info->short_form)
4550
    return;
4551
  print_header(file, print_event_info);
4552 4553 4554
  fputc('\n', file);
  fprintf(file, "#Delete_file: file_id=%u\n", file_id);
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4555
#endif /* MYSQL_CLIENT */
4556

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monty@narttu.mysql.fi committed
4557
/*
4558
  Delete_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4559
*/
4560

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4561
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4562
void Delete_file_log_event::pack_info(Protocol *protocol)
4563 4564 4565 4566
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4567
  protocol->store(buf, (int32) length, &my_charset_bin);
4568
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4569
#endif
4570

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monty@narttu.mysql.fi committed
4571
/*
4572
  Delete_file_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4573
*/
4574

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SCRUM  
hf@deer.mysql.r18.ru committed
4575
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4576 4577 4578
int Delete_file_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
4579
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
4580
  (void) my_delete(fname, MYF(MY_WME));
4581
  strmov(ext, ".info");
4582 4583 4584
  (void) my_delete(fname, MYF(MY_WME));
  return Log_event::exec_event(rli);
}
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monty@narttu.mysql.fi committed
4585
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4586 4587


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4588
/**************************************************************************
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monty@narttu.mysql.fi committed
4589
	Execute_load_log_event methods
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4590
**************************************************************************/
4591

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4592
/*
4593
  Execute_load_log_event ctor
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4594
*/
4595 4596

#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)
4600 4601
{
}
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4602
#endif
4603 4604
  

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4605
/*
4606
  Execute_load_log_event ctor
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4607
*/
4608

4609 4610 4611
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)
4612
{
4613 4614 4615
  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))
4616
    return;
4617
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
4618 4619 4620
}


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monty@narttu.mysql.fi committed
4621
/*
4622
  Execute_load_log_event::write()
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4623
*/
4624

4625
#ifndef MYSQL_CLIENT
4626
bool Execute_load_log_event::write(IO_CACHE* file)
4627 4628 4629
{
  byte buf[EXEC_LOAD_HEADER_LEN];
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
4630 4631
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
4632
}
4633
#endif
4634 4635


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4636
/*
4637
  Execute_load_log_event::print()
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4638
*/
4639 4640

#ifdef MYSQL_CLIENT  
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4641
void Execute_load_log_event::print(FILE* file,
4642
				   PRINT_EVENT_INFO* print_event_info)
4643
{
4644
  if (print_event_info->short_form)
4645
    return;
4646
  print_header(file, print_event_info);
4647 4648 4649 4650
  fputc('\n', file);
  fprintf(file, "#Exec_load: file_id=%d\n",
	  file_id);
}
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4651
#endif
4652

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4653
/*
4654
  Execute_load_log_event::pack_info()
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4655
*/
4656

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SCRUM  
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4657
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4658
void Execute_load_log_event::pack_info(Protocol *protocol)
4659 4660 4661 4662
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4663
  protocol->store(buf, (int32) length, &my_charset_bin);
4664 4665 4666
}


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monty@narttu.mysql.fi committed
4667
/*
4668
  Execute_load_log_event::exec_event()
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4669
*/
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4670

4671
int Execute_load_log_event::exec_event(struct st_relay_log_info* rli)
4672 4673
{
  char fname[FN_REFLEN+10];
4674
  char *ext;
4675
  int fd;
4676
  int error= 1;
4677
  IO_CACHE file;
4678
  Load_log_event *lev= 0;
4679

4680
  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)))
  {
4686 4687
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Exec_load event: "
                    "could not open file '%s'", fname);
4688 4689
    goto err;
  }
4690
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
4691 4692
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
4693
      lev->get_type_code() != NEW_LOAD_EVENT)
4694
  {
4695 4696
    slave_print_msg(ERROR_LEVEL, rli, 0, "Error in Exec_load event: "
                    "file '%s' appears corrupted", fname);
4697 4698
    goto err;
  }
4699

4700
  lev->thd = thd;
4701 4702
  /*
    lev->exec_event should use rli only for errors
4703 4704 4705
    i.e. should not advance rli's position.
    lev->exec_event is the place where the table is loaded (it calls
    mysql_load()).
4706
  */
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guilhem@mysql.com committed
4707

4708
  rli->future_group_master_log_pos= log_pos;
4709
  if (lev->exec_event(0,rli,1)) 
4710
  {
4711 4712 4713 4714 4715 4716 4717 4718 4719
    /*
      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));
4720 4721
    if (tmp)
    {
4722 4723 4724 4725
      slave_print_msg(ERROR_LEVEL, rli,
                      rli->last_slave_errno, /* ok to re-use error code */
                      "%s. Failed executing load from '%s'", 
                      tmp, fname);
4726 4727
      my_free(tmp,MYF(0));
    }
4728 4729
    goto err;
  }
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4730 4731 4732 4733 4734 4735 4736 4737 4738 4739
  /*
    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;
  }
4740
  (void) my_delete(fname, MYF(MY_WME));
4741
  memcpy(ext, ".data", 6);
4742
  (void) my_delete(fname, MYF(MY_WME));
4743
  error = 0;
4744

4745 4746 4747
err:
  delete lev;
  if (fd >= 0)
4748
  {
4749
    my_close(fd, MYF(0));
4750 4751
    end_io_cache(&file);
  }
4752
  return error ? error : Log_event::exec_event(rli);
4753
}
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4754

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4755
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4756 4757


4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782
/**************************************************************************
	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)
4783
int Begin_load_query_log_event::get_create_or_append() const
4784
{
4785
  return 1; /* create the file */
4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839
}
#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;
}


4840
#ifndef MYSQL_CLIENT
4841 4842 4843 4844 4845 4846 4847 4848 4849 4850
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);
}
4851
#endif
4852 4853 4854


#ifdef MYSQL_CLIENT
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4855
void Execute_load_query_log_event::print(FILE* file,
4856
                                         PRINT_EVENT_INFO* print_event_info)
4857
{
4858
  print(file, print_event_info, 0);
4859 4860 4861
}


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4862
void Execute_load_query_log_event::print(FILE* file,
4863
                                         PRINT_EVENT_INFO* print_event_info,
4864 4865
                                         const char *local_fname)
{
4866
  print_query_header(file, print_event_info);
4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886

  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");
  }

4887
  if (!print_event_info->short_form)
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 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930
    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))))
  {
4931
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Not enough memory");
4932 4933 4934 4935 4936 4937
    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
4938
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
4939 4940
  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
4941
  *(p++)='\'';
4942
  switch (dup_handling) {
4943
  case LOAD_DUP_IGNORE:
4944
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
4945 4946
    break;
  case LOAD_DUP_REPLACE:
4947
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
4948 4949 4950 4951 4952
    break;
  default:
    /* Ordinary load data */
    break;
  }
4953
  p= strmake(p, STRING_WITH_LEN(" INTO"));
4954 4955 4956 4957 4958 4959 4960
  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;

4961 4962 4963 4964 4965 4966
  /*
    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));
4967 4968 4969 4970 4971 4972 4973

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


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4974
/**************************************************************************
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monty@narttu.mysql.fi committed
4975
	sql_ex_info methods
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monty@mashka.mysql.fi committed
4976
**************************************************************************/
4977

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monty@narttu.mysql.fi committed
4978
/*
4979
  sql_ex_info::write_data()
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monty@narttu.mysql.fi committed
4980
*/
4981

4982
bool sql_ex_info::write_data(IO_CACHE* file)
4983 4984 4985
{
  if (new_format())
  {
4986 4987 4988 4989 4990
    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) ||
4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002
	    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;
5003
    return my_b_safe_write(file, (byte*) &old_ex, sizeof(old_ex)) != 0;
5004 5005 5006 5007
  }
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5008
/*
5009
  sql_ex_info::init()
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monty@narttu.mysql.fi committed
5010
*/
5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024

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.
    */
5025 5026 5027 5028 5029
    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))
5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055
      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;
}
5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067


#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),
5068
    m_row_count(0),
5069 5070
    m_table(tbl_arg),
    m_table_id(tid),
5071 5072
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0),
5073 5074
    m_flags(0)
{
5075 5076 5077 5078 5079 5080
  /*
    We allow a special form of dummy event when the table, and cols
    are null and the table id is ULONG_MAX.
   */
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ULONG_MAX ||
              !tbl_arg && !cols && tid == ULONG_MAX);
5081 5082 5083 5084 5085 5086 5087 5088 5089 5090

  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)))
5091 5092 5093 5094 5095
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
  }
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  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),
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    m_row_count(0),
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    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;
  }

  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);
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  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
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  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 cur_size= m_rows_cur - m_rows_buf;
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    my_ptrdiff_t const new_alloc= 
        block_size * ((cur_size + length) / block_size + block_size - 1);
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    byte* const new_buf= (byte*)my_realloc((gptr)m_rows_buf, new_alloc,
                                           MYF(MY_ALLOW_ZERO_PTR|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;
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  m_row_count++;
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  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*)");
  int error= 0;
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  char const *row_start= (char const *)m_rows_buf;
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  /*
    If m_table_id == ULONG_MAX, then we have a dummy event that does
    not contain any data.  In that case, we just remove all tables in
    the tables_to_lock list, step the relay log position, and return
    with success.
   */
  if (m_table_id == ULONG_MAX)
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

    rli->clear_tables_to_lock();
    thd->clear_error();
    rli->inc_event_relay_log_pos();
    DBUG_RETURN(0);
  }
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  /*
    '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);

  /*
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    If there is no locks taken, this is the first binrow event seen
    after the table map events.  We should then lock all the tables
    used in the transaction and proceed with execution of the actual
    event.
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  */
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  if (!thd->lock)
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  {
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    bool need_reopen= 1; /* To execute the first lap of the loop below */

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    /*
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      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.
5308
    */
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    mysql_init_query(thd, NULL, 0);
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    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
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      if (!need_reopen)
      {
        slave_print_msg(ERROR_LEVEL, rli, error,
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                        "Error in %s event: when locking tables",
                        get_type_str());
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        DBUG_RETURN(error);
      }
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      /*
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        So we need to reopen the tables.
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        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
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        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
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        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
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       */
      thd->binlog_flush_pending_rows_event(false);
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      close_tables_for_reopen(thd, rli->tables_to_lock);
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      if ((error= open_tables(thd, &rli->tables_to_lock,
                              &rli->tables_to_lock_count, 0)))
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      {
        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,
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                          "Error '%s' on reopening tables",
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                          (actual_error ? thd->net.last_error :
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                           "unexpected success or fatal error"));
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          thd->query_error= 1;
        }
        DBUG_RETURN(error);
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      }
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    }
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    /*
      When the open and locking succeeded, we add all the tables to
      the table map and remove them from tables to lock.
     */
    
    TABLE_LIST *ptr= rli->tables_to_lock;
    while (ptr)
    {
      rli->m_table_map.set_table(ptr->table_id, ptr->table);
      rli->touching_table(ptr->db, ptr->table_name, ptr->table_id);
      char *to_free= reinterpret_cast<char*>(ptr);
      ptr= ptr->next_global;
      my_free(to_free, MYF(MY_WME));
    }
    rli->tables_to_lock= 0;
    rli->tables_to_lock_count= 0;
  }

  TABLE* table= rli->m_table_map.get_table(m_table_id);

  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).
    */
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    /*
      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);
  }

5536
  if (table && (table->s->primary_key == MAX_KEY) && !cache_stmt)
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  {
    /*
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      ------------ 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.
5553
    */
5554
    rli->unsafe_to_stop_at= time(0);
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  }

  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)
{
  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));
5591

5592
  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

5599
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5600 5601
void Rows_log_event::pack_info(Protocol *protocol)
{
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#ifdef DBUG_RBR
  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
  my_size_t bytes= snprintf(buf, sizeof(buf),
                            "table_id: %lu%s", m_table_id, flagstr);
  protocol->store(buf, bytes, &my_charset_bin);
#endif
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}
#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;
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serg@serg.mylan committed
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master", m_data_size= 6;);
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  m_data_size+= m_dblen + 2;	// Include length and terminating \0
  m_data_size+= m_tbllen + 2;	// Include length and terminating \0
  m_data_size+= 1 + m_colcnt;	// COLCNT and column types

  /* 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));
}

/*
  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);

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  TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  void *const memory=
    my_multi_malloc(MYF(MY_WME),
                    &table_list, sizeof(TABLE_LIST),
                    &db_mem, NAME_LEN + 1,
                    &tname_mem, NAME_LEN + 1,
                    NULL);

  /*
    If memory is allocated, it the pointer to it should be stored in
    table_list.  If this is not true, the memory will not be correctly
    free:ed later.
  */
  DBUG_ASSERT(memory == NULL || memory == table_list);

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  uint32 dummy_len;
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  bzero(table_list, sizeof(*table_list));
  table_list->db = db_mem;
  table_list->alias= table_list->table_name = tname_mem;
  table_list->lock_type= TL_WRITE;
  table_list->next_global= table_list->next_local= 0;
  table_list->table_id= m_table_id;
  table_list->updating= 1;
  strmov(table_list->db, rpl_filter->get_rewrite_db(m_dbnam, &dummy_len));
  strmov(table_list->table_name, m_tblnam);
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  int error= 0;

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  if (rpl_filter->db_ok(table_list->db) &&
      (!rpl_filter->is_on() || rpl_filter->tables_ok("", table_list)))
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  {
    /*
      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;
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    /*
      open_tables() reads the contents of thd->lex, so they must be
      initialized, so we should call lex_start(); to be even safer, we
      call mysql_init_query() which does a more complete set of inits.
    */
    mysql_init_query(thd, NULL, 0);
    if ((error= open_tables(thd, &table_list, &count, 0)))
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    {
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      if (thd->query_error || thd->is_fatal_error)
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      {
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        /*
          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;
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      }
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      DBUG_RETURN(error);
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    }

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    m_table= table_list->table;
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    /*
      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);
    }

    /*
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      We record in the slave's information that the table should be
      locked by linking the table into the list of tables to lock, and
      tell the RLI that we are touching a table.
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    */
    if (!error)
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    {
      table_list->next_global= table_list->next_local= rli->tables_to_lock;
      rli->tables_to_lock= table_list;
      rli->tables_to_lock_count++;
    }
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  }

  /*
    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.
 */

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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Table_map_log_event::pack_info(Protocol *protocol)
{
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#ifdef DBUG_RBR
    char buf[256];
    my_size_t bytes= snprintf(buf, sizeof(buf),
                              "table_id: %lu (%s.%s)",
                              m_table_id, m_dbnam, m_tblnam);
    protocol->store(buf, bytes, &my_charset_bin);
#else
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    char buf[256];
    my_size_t bytes= snprintf(buf, sizeof(buf), "%s.%s", m_dbnam, m_tblnam);
    protocol->store(buf, bytes, &my_charset_bin);
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#endif
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}
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#endif

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#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, (byte*)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) */