log_event.cc 217 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 "rpl_utility.h"
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#include <my_dir.h>
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#endif /* MYSQL_CLIENT */
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#include <base64.h>
#include <my_bitmap.h>
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#define log_cs	&my_charset_latin1
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/*
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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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/*
  Append a version of the 'from' string suitable for use in a query to
  the 'to' string.  To generate a correct escaping, the character set
  information in 'csinfo' is used.
 */
#ifndef MYSQL_CLIENT
int
append_query_string(CHARSET_INFO *csinfo,
                    String const *from, String *to)
{
  char *beg, *ptr;
  uint32 const orig_len= to->length();
  if (to->reserve(orig_len + from->length()*2+3))
    return 1;

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

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

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#ifdef MYSQL_CLIENT
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static void print_set_option(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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}
520

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/*
523
  Log_event::pack_info()
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*/
525

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void Log_event::pack_info(Protocol *protocol)
527
{
528
  protocol->store("", &my_charset_bin);
529 530 531
}


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/*
533
  Log_event::net_send()
534

535
  Only called by SHOW BINLOG EVENTS
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*/
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538
int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos)
539
{
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  const char *p= strrchr(log_name, FN_LIBCHAR);
  const char *event_type;
542 543 544
  if (p)
    log_name = p + 1;
  
545
  protocol->prepare_for_resend();
546
  protocol->store(log_name, &my_charset_bin);
547
  protocol->store((ulonglong) pos);
548
  event_type = get_type_str();
549
  protocol->store(event_type, strlen(event_type), &my_charset_bin);
550 551 552 553
  protocol->store((uint32) server_id);
  protocol->store((ulonglong) log_pos);
  pack_info(protocol);
  return protocol->write();
554
}
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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));
570
  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));
}

575

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/*
577
  Log_event::write()
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*/
579

580
bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
582 583
  byte header[LOG_EVENT_HEADER_LEN];
  DBUG_ENTER("Log_event::write_header");
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585 586
  /* Store number of bytes that will be written by this event */
  data_written= event_data_length + sizeof(header);
587

588 589 590 591
  /*
    log_pos != 0 if this is relay-log event. In this case we should not
    change the position
  */
592

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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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/*
652
  Log_event::read_log_event()
653 654 655 656

  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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*/
658

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int Log_event::read_log_event(IO_CACHE* file, String* packet,
660
			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
663
  int result=0;
664
  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
665
  DBUG_ENTER("read_log_event");
666

667
  if (log_lock)
668
    pthread_mutex_lock(log_lock);
669 670
  if (my_b_read(file, (byte*) buf, sizeof(buf)))
  {
671 672 673 674 675
    /*
      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.
    */
676
    DBUG_PRINT("error",("file->error: %d", file->error));
677 678 679
    if (!file->error)
      result= LOG_READ_EOF;
    else
680
      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
681
    goto end;
682
  }
683
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
684
  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
685
      data_len > current_thd->variables.max_allowed_packet)
686
  {
687
    DBUG_PRINT("error",("data_len: %ld", data_len));
688
    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
689 690
	     LOG_READ_TOO_LARGE);
    goto end;
691
  }
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  packet->append(buf, sizeof(buf));
693
  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
694 695 696
  if (data_len)
  {
    if (packet->append(file, data_len))
697
    {
698
      /*
699 700
	Here if we hit EOF it's really an error: as data_len is >=0
        there's supposed to be more bytes available. 
701
	EOF means we are reading the event partially, which should
702
	never happen: either we read badly or the binlog is truncated.
703 704 705
      */
      result= file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO;
      /* Implicit goto end; */
706
    }
707
  }
708 709 710 711

end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
712
  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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716
#ifndef MYSQL_CLIENT
717 718
#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
719
#else
720
#define UNLOCK_MUTEX
721 722 723
#define LOCK_MUTEX
#endif

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/*
725 726
  Log_event::read_log_event()

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  NOTE:
728
    Allocates memory;  The caller is responsible for clean-up.
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*/
730

731
#ifndef MYSQL_CLIENT
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
734
                                     const Format_description_log_event *description_event)
735
#else
736 737
Log_event* Log_event::read_log_event(IO_CACHE* file,
                                     const Format_description_log_event *description_event)
738
#endif
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{
740
  DBUG_ENTER("Log_event::read_log_event(IO_CACHE *, Format_description_log_event *");
741
  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
752

753
  LOCK_MUTEX;
754
  DBUG_PRINT("info", ("my_b_tell=%lu", my_b_tell(file)));
755
  if (my_b_read(file, (byte *) head, header_size))
756
  {
757 758
    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
760
    /*
761 762 763
      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.
764
    */
765
    DBUG_RETURN(0);
766
  }
767
  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;
773
  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
774
#endif
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776
  if (data_len > max_allowed_packet)
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  {
778 779
    error = "Event too big";
    goto err;
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  }

782
  if (data_len < header_size)
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  {
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    error = "Event too small";
    goto err;
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  }
787 788 789

  // some events use the extra byte to null-terminate strings
  if (!(buf = my_malloc(data_len+1, MYF(MY_WME))))
790 791 792
  {
    error = "Out of memory";
    goto err;
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  }
794
  buf[data_len] = 0;
795
  memcpy(buf, head, header_size);
796
  if (my_b_read(file, (byte*) buf + header_size, data_len - header_size))
797 798 799 800
  {
    error = "read error";
    goto err;
  }
801
  if ((res= read_log_event(buf, data_len, &error, description_event)))
802
    res->register_temp_buf(buf);
803

804
err:
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  UNLOCK_MUTEX;
806
  if (!res)
807
  {
808
    DBUG_ASSERT(error != 0);
809 810
    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
811
		    error,data_len,head[EVENT_TYPE_OFFSET]);
812
    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;
822
  }
823
  DBUG_RETURN(res);
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}

826

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827
/*
828
  Log_event::read_log_event()
829 830
  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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831
*/
832

833 834 835
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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836
{
837 838
  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
839
  DBUG_ASSERT(description_event != 0);
840
  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
841
  if (event_len < EVENT_LEN_OFFSET ||
842 843 844
      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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845
    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
846
  }
847

848 849 850
  /* To check the integrity of the Log_event_type enumeration */
  DBUG_ASSERT(buf[EVENT_TYPE_OFFSET] < ENUM_END_EVENT);

851
  switch(buf[EVENT_TYPE_OFFSET]) {
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852
  case QUERY_EVENT:
853
    ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
854
    break;
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855
  case LOAD_EVENT:
856
    ev = new Load_log_event(buf, event_len, description_event);
857
    break;
858
  case NEW_LOAD_EVENT:
859
    ev = new Load_log_event(buf, event_len, description_event);
860
    break;
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  case ROTATE_EVENT:
862
    ev = new Rotate_log_event(buf, event_len, description_event);
863
    break;
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#ifdef HAVE_REPLICATION
865
  case SLAVE_EVENT: /* can never happen (unused event) */
866 867
    ev = new Slave_log_event(buf, event_len);
    break;
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#endif /* HAVE_REPLICATION */
869
  case CREATE_FILE_EVENT:
870
    ev = new Create_file_log_event(buf, event_len, description_event);
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    break;
  case APPEND_BLOCK_EVENT:
873
    ev = new Append_block_log_event(buf, event_len, description_event);
874 875
    break;
  case DELETE_FILE_EVENT:
876
    ev = new Delete_file_log_event(buf, event_len, description_event);
877 878
    break;
  case EXEC_LOAD_EVENT:
879
    ev = new Execute_load_log_event(buf, event_len, description_event);
880
    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:
885
    ev = new Stop_log_event(buf, description_event);
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    break;
  case INTVAR_EVENT:
888
    ev = new Intvar_log_event(buf, description_event);
889
    break;
890 891 892
  case XID_EVENT:
    ev = new Xid_log_event(buf, description_event);
    break;
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  case RAND_EVENT:
894
    ev = new Rand_log_event(buf, description_event);
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    break;
896
  case USER_VAR_EVENT:
897 898 899 900
    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); 
901
    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;
922
  default:
923 924
    DBUG_PRINT("error",("Unknown evernt code: %d",(int) buf[EVENT_TYPE_OFFSET]));
    ev= NULL;
925
    break;
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  }
927

928
  /*
929 930 931 932 933 934 935
    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'.
936
  */
937
  if (!ev || !ev->is_valid())
938
  {
939 940
    DBUG_PRINT("error",("Found invalid event in binary log"));

941
    delete ev;
942
#ifdef MYSQL_CLIENT
943
    if (!force_opt) /* then mysqlbinlog dies */
944 945
    {
      *error= "Found invalid event in binary log";
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946
      DBUG_RETURN(0);
947
    }
948
    ev= new Unknown_log_event(buf, description_event);
949 950
#else
    *error= "Found invalid event in binary log";
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951
    DBUG_RETURN(0);
952
#endif
953
  }
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  DBUG_RETURN(ev);  
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}

957
#ifdef MYSQL_CLIENT
958

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959
/*
960
  Log_event::print_header()
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961
*/
962

963
void Log_event::print_header(FILE* file, PRINT_EVENT_INFO* print_event_info)
964
{
965
  char llbuff[22];
966
  my_off_t hexdump_from= print_event_info->hexdump_from;
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968 969
  fputc('#', file);
  print_timestamp(file);
970
  fprintf(file, " server id %d  end_log_pos %s ", server_id,
971
	  llstr(log_pos,llbuff));
972

973
  /* mysqlbinlog --hexdump */
974
  if (print_event_info->hexdump_from)
975 976
  {
    fprintf(file, "\n");
977 978 979
    uchar *ptr= (uchar*)temp_buf;
    my_off_t size=
      uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
980 981
    my_off_t i;

982 983 984 985
    /* 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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986
    /* Pretty-print event common header if header is exactly 19 bytes */
987
    if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
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988 989 990 991 992 993
    {
      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",
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	      (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;
    }
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    /* Rest of event (without common header) */
    for (i= 0, c= char_string, h=hex_string;
	 i < size;
	 i++, ptr++)
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    {
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      my_snprintf(h, 4, "%02x ", *ptr);
      h += 3;
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      *c++= my_isalnum(&my_charset_bin, *ptr) ? *ptr : '.';
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      if (i % 16 == 15)
      {
1014
	fprintf(file, "# %8.8lx %-48.48s |%16s|\n",
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		(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;
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      }
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      else if (i % 8 == 7) *h++ = ' ';
1023
    }
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    *c= '\0';
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    /* Non-full last line */
1027
    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);
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  }
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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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/*
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  Log_event::print_timestamp()
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*/
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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)
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      && db && db_len)
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  {
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    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
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  }
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  if (query && q_len)
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  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
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  protocol->store(buf, pos-buf, &my_charset_bin);
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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}
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#endif
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#ifndef MYSQL_CLIENT
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/* Utility function for the next method */
static void write_str_with_code_and_len(char **dst, const char *src,
                                        int len, uint code)
{
  DBUG_ASSERT(src);
  *((*dst)++)= code;
  *((*dst)++)= (uchar) len;
  bmove(*dst, src, len);
  (*dst)+= len;
}


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

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

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

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

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

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

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/*
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  Query_log_event::Query_log_event()
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*/
1307
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)
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  :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),
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   error_code((thd_arg->killed != THD::NOT_KILLED) ?
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              ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ?
1318
               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),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
   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;
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  /* status_vars_len is set just before writing the event */
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  db_len = (db) ? (uint32) strlen(db) : 0;
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  /*
    If 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;
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  DBUG_PRINT("info",("Query_log_event has flags2=%lu sql_mode=%lu",flags2,sql_mode));
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}
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#endif /* MYSQL_CLIENT */
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/* 2 utility functions for the next method */

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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/*
1384
  Query_log_event::Query_log_event()
1385
  This is used by the SQL slave thread to prepare the event before execution.
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*/
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Query_log_event::Query_log_event(const char* buf, uint event_len,
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                                 const Format_description_log_event *description_event,
                                 Log_event_type event_type)
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  :Log_event(buf, description_event), data_buf(0), query(NullS),
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   db(NullS), catalog_len(0), status_vars_len(0),
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   flags2_inited(0), sql_mode_inited(0), charset_inited(0),
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   auto_increment_increment(1), auto_increment_offset(1),
   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)
1432
  {
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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);
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  end= (const char*) (start+status_vars_len);
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  for (const uchar* pos= (const uchar*) start; pos < (const uchar*) end;)
1450
  {
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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;
    }
1470
    case Q_CATALOG_NZ_CODE:
1471
      get_str_len_and_pointer(&catalog, (const char **)(&pos), &catalog_len);
1472 1473 1474 1475 1476 1477
      break;
    case Q_AUTO_INCREMENT:
      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
1478 1479 1480 1481 1482 1483 1484
    case Q_CHARSET_CODE:
    {
      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
1485 1486
    case Q_TIME_ZONE_CODE:
    {
1487
      get_str_len_and_pointer(&time_zone_str, (const char **)(&pos), &time_zone_len);
1488 1489
      break;
    }
1490 1491 1492 1493 1494 1495
    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)));
1500
      pos= (const uchar*) end;                         // Break loop
1501
    }
1502
  }
1503
  
1504
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
1505 1506
  if (!(start= data_buf = (char*) my_malloc(catalog_len + 1 +
                                            time_zone_len + 1 +
1507 1508 1509 1510 1511 1512 1513 1514 1515
                                            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))))
1516
#endif
1517
      DBUG_VOID_RETURN;
1518
  if (catalog_len)                                  // If catalog is given
1519
  {
1520
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1521
      copy_str_and_move(&start, &catalog, catalog_len);
1522 1523 1524 1525 1526 1527
    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
      catalog= start;
      start+= catalog_len+1;
    }
1528
  }
1529
  if (time_zone_len)
1530 1531
    copy_str_and_move(&start, &time_zone_str, time_zone_len);

1532
  /* A 2nd variable part; this is common to all versions */ 
1533
  memcpy((char*) start, end, data_len);          // Copy db and query
1534
  start[data_len]= '\0';              // End query with \0 (For safetly)
1535 1536 1537 1538
  db= start;
  query= start + db_len + 1;
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

1541

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1542
/*
1543
  Query_log_event::print()
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1544
*/
1545

1546
#ifdef MYSQL_CLIENT
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1547
void Query_log_event::print_query_header(FILE* file,
1548
					 PRINT_EVENT_INFO* print_event_info)
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1549
{
1550
  // TODO: print the catalog ??
1551
  char buff[40],*end;				// Enough for SET TIMESTAMP
1552 1553 1554
  bool different_db= 1;
  uint32 tmp;

1555
  if (!print_event_info->short_form)
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1556
  {
1557
    print_header(file, print_event_info);
1558 1559
    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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1560 1561
  }

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  if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db)
1563
  {
1564 1565
    if (different_db= memcmp(print_event_info->db, db, db_len + 1))
      memcpy(print_event_info->db, db, db_len + 1);
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    if (db[0] && different_db) 
1567
      fprintf(file, "use %s;\n", db);
1568
  }
1569

1570 1571 1572 1573
  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));
1574 1575
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"SET @@session.pseudo_thread_id=%lu;\n",(ulong)thread_id);
1576

1577
  /*
1578 1579 1580
    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).
1581 1582 1583 1584
  */
  if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
  {
    /* tmp is a bitmask of bits which have changed. */
1585
    if (likely(print_event_info->flags2_inited)) 
1586
      /* All bits which have changed */
1587
      tmp= (print_event_info->flags2) ^ flags2;
1588 1589
    else /* that's the first Query event we read */
    {
1590
      print_event_info->flags2_inited= 1;
1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604
      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");
1605
      print_event_info->flags2= flags2;
1606 1607 1608 1609
    }
  }

  /*
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
    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.
1620 1621 1622 1623
  */

  if (likely(sql_mode_inited))
  {
1624
    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
1625
    {
1626
      print_event_info->sql_mode_inited= 1;
1627
      /* force a difference to force write */
1628
      print_event_info->sql_mode= ~sql_mode;
1629
    }
1630
    if (unlikely(print_event_info->sql_mode != sql_mode))
1631 1632
    {
      fprintf(file,"SET @@session.sql_mode=%lu;\n",(ulong)sql_mode);
1633
      print_event_info->sql_mode= sql_mode;
1634 1635
    }
  }
1636 1637
  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
1638 1639 1640
  {
    fprintf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu;\n",
            auto_increment_increment,auto_increment_offset);
1641 1642
    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
1643 1644
  }

1645 1646
  /* TODO: print the catalog when we feature SET CATALOG */

1647 1648
  if (likely(charset_inited))
  {
1649
    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
1650
    {
1651 1652
      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
1653
    }
1654
    if (unlikely(bcmp(print_event_info->charset, charset, 6)))
1655
    {
1656 1657 1658 1659 1660
      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 */
      }
1661 1662 1663 1664 1665 1666 1667 1668
      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));
1669
      memcpy(print_event_info->charset, charset, 6);
1670 1671
    }
  }
1672 1673
  if (time_zone_len)
  {
1674
    if (bcmp(print_event_info->time_zone_str, time_zone_str, time_zone_len+1))
1675 1676
    {
      fprintf(file,"SET @@session.time_zone='%s';\n", time_zone_str);
1677
      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
1678 1679
    }
  }
1680 1681
}

1682

1683
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
1684
{
1685
  print_query_header(file, print_event_info);
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1686
  my_fwrite(file, (byte*) query, q_len, MYF(MY_NABP | MY_WME));
1687
  fputs(";\n", file);
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}
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1689
#endif /* MYSQL_CLIENT */
1690

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1691

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1692
/*
1693
  Query_log_event::exec_event()
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1694
*/
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1695

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SCRUM  
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1696
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1697

1698
int Query_log_event::exec_event(struct st_relay_log_info* rli)
1699 1700 1701 1702 1703
{
  return exec_event(rli, query, q_len);
}


1704 1705
int Query_log_event::exec_event(struct st_relay_log_info* rli,
                                const char *query_arg, uint32 q_len_arg)
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1706
{
1707
  LEX_STRING new_db;
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1708
  int expected_error,actual_error= 0;
1709 1710 1711 1712 1713 1714
  /*
    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.
  */
1715
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
1716 1717 1718
  new_db.length= db_len;
  new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
  thd->set_db(new_db.str, new_db.length);       /* allocates a copy of 'db' */
1719 1720
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1721

1722
  /*
1723 1724 1725 1726 1727 1728 1729 1730
    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.
1731
  */
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1732
  rli->future_group_master_log_pos= log_pos;
1733 1734
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

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1735
  clear_all_errors(thd, rli);
1736
  rli->clear_tables_to_lock();
1737

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1738 1739 1740 1741 1742 1743 1744 1745 1746 1747
  /*
    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().
  */
1748
  if (rpl_filter->db_ok(thd->db))
1749 1750
  {
    thd->set_time((time_t)when);
1751 1752
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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1753
    VOID(pthread_mutex_lock(&LOCK_thread_count));
1754
    thd->query_id = next_query_id();
1755
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
1756
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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1757
    DBUG_PRINT("query",("%s",thd->query));
1758

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1759
    if (ignored_error_code((expected_error= error_code)) ||
1760
	!check_expected_error(thd,rli,expected_error))
1761 1762 1763
    {
      if (flags2_inited)
        /*
1764 1765
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
1766
        */
1767
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
1768 1769
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
1770 1771
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
1772 1773 1774 1775 1776
      */
      /*
        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
1777 1778 1779
        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).
1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797
      */
      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))))
          {
            /*
1798 1799 1800 1801
              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).
1802
            */
1803
            set_slave_thread_default_charset(thd, rli);
1804 1805 1806 1807 1808
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
      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;
        }
      }
1820 1821

      /* Execute the query (note that we bypass dispatch_command()) */
1822
      mysql_parse(thd, thd->query, thd->query_length);
1823 1824

    }
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1825 1826
    else
    {
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1827
      /*
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1828 1829 1830 1831 1832
        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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1833
      */
1834
      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
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1835 1836
        clear_all_errors(thd, rli);        /* Can ignore query */
      else
1837
      {
1838
        slave_print_msg(ERROR_LEVEL, rli, expected_error, 
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1839
                          "\
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1840
Query partially completed on the master (error on master: %d) \
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1841 1842 1843
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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1844
START SLAVE; . Query: '%s'", expected_error, thd->query);
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1845 1846 1847 1848
        thd->query_error= 1;
      }
      goto end;
    }
1849

1850 1851
    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
1852
      general_log_print(thd, COM_QUERY, "%s", thd->query);
1853

1854
compare_errors:
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1855 1856

     /*
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1857 1858 1859 1860
      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",
1861
 		       expected_error, thd->net.last_errno));
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1862
    if ((expected_error != (actual_error= thd->net.last_errno)) &&
1863 1864 1865
 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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1866
    {
1867 1868 1869
      slave_print_msg(ERROR_LEVEL, rli, 0,
                      "\
Query caused different errors on master and slave.     \
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1870
Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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1871
Default database: '%s'. Query: '%s'",
1872 1873 1874 1875 1876
                      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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1877 1878 1879 1880 1881 1882
      thd->query_error= 1;
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
1883
 	     ignored_error_code(actual_error))
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1884 1885 1886 1887 1888 1889
    {
      DBUG_PRINT("info",("error ignored"));
      clear_all_errors(thd, rli);
    }
    /*
      Other cases: mostly we expected no error and get one.
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    */
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1891 1892
    else if (thd->query_error || thd->is_fatal_error)
    {
1893 1894 1895 1896 1897
      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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1898 1899
      thd->query_error= 1;
    }
1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913

    /*
      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...
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      To do the comparison we need to know the value of "affected" which the
      above mysql_parse() computed. And we need to know the value of
      "affected" in the master's binlog. Both will be implemented later. The
      important thing is that we now have the format ready to log the values
      of "affected" in the binlog. So we can release 5.0.0 before effectively
      logging "affected" and effectively comparing it.
    */
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  } /* End of if (db_ok(... */

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end:
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  VOID(pthread_mutex_lock(&LOCK_thread_count));
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  /*
    Probably we have set thd->query, thd->db, thd->catalog to point to places
    in the data_buf of this event. Now the event is going to be deleted
    probably, so data_buf will be freed, so the thd->... listed above will be
    pointers to freed memory. 
    So we must set them to 0, so that those bad pointers values are not later
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    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.
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  */
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  thd->catalog= 0;
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  thd->set_db(NULL, 0);                 /* will free the current database */
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  thd->query= 0;			// just to be sure
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  thd->query_length= 0;
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  VOID(pthread_mutex_unlock(&LOCK_thread_count));
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  close_thread_tables(thd);      
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  /*
    As a disk space optimization, future masters will not log an event for
    LAST_INSERT_ID() if that function returned 0 (and thus they will be able
    to replace the THD::stmt_depends_on_first_successful_insert_id_in_prev_stmt
    variable by (THD->first_successful_insert_id_in_prev_stmt > 0) ; with the
    resetting below we are ready to support that.
  */
  thd->first_successful_insert_id_in_prev_stmt_for_binlog= 0;
  thd->first_successful_insert_id_in_prev_stmt= 0;
  thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 0;
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  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
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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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/**************************************************************************
	Muted_query_log_event methods
**************************************************************************/

#ifndef MYSQL_CLIENT
/*
  Muted_query_log_event::Muted_query_log_event()
*/
Muted_query_log_event::Muted_query_log_event()
  :Query_log_event()
{
}
#endif


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/**************************************************************************
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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
2404 2405 2406
    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.
2407 2408 2409 2410 2411 2412
  */
  DBUG_RETURN(Start_log_event_v3::exec_event(rli));
}
#endif

  /**************************************************************************
2413
        Load_log_event methods
2414
   General note about Load_log_event: the binlogging of LOAD DATA INFILE is
2415
   going to be changed in 5.0 (or maybe in 5.1; not decided yet).
2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427
   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).
  **************************************************************************/
2428

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/*
2430
  Load_log_event::pack_info()
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*/
2432

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SCRUM  
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
2434
uint Load_log_event::get_query_buffer_length()
2435
{
2436
  return
2437 2438
    5 + db_len + 3 +                        // "use DB; "
    18 + fname_len + 2 +                    // "LOAD DATA INFILE 'file''"
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    7 +					    // LOCAL
2440
    9 +                                     // " REPLACE or IGNORE "
2441
    13 + table_name_len*2 +                 // "INTO TABLE `table`"
2442 2443 2444 2445
    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'"
2446 2447
    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'"
    15 + 22 +                               // " IGNORE xxx  LINES"
2448
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"
2449
}
2450

2451 2452 2453 2454 2455 2456 2457

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)
2458
  {
2459 2460
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
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    pos= strmov(pos+db_len, "`; ");
2462
  }
2463

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  pos= strmov(pos, "LOAD DATA ");
2465 2466 2467 2468

  if (fn_start)
    *fn_start= pos;

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  if (check_fname_outside_temp_buf())
    pos= strmov(pos, "LOCAL ");
  pos= strmov(pos, "INFILE '");
2472
  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
2474

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  if (sql_ex.opt_flags & REPLACE_FLAG)
2476
    pos= strmov(pos, " REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
2478 2479
    pos= strmov(pos, " IGNORE ");

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

  pos= strmov(pos ," TABLE `");
2486 2487 2488
  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 */
2490
  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);
2496

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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
2499

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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
2502 2503
  if (sql_ex.line_start_len)
  {
2504
    pos= strmov(pos, " STARTING BY ");
2505
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
2506
  }
2507

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  if ((long) skip_lines > 0)
2509 2510
  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
2512 2513
    pos= strmov(pos," LINES ");    
  }
2514 2515 2516 2517

  if (num_fields)
  {
    uint i;
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    const char *field= fields;
2519
    pos= strmov(pos, " (");
2520 2521 2522
    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
2527
      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
2530
    }
2531
    *pos++= ')';
2532
  }
2533

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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));
2547
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
2549

2550

2551 2552
#ifndef MYSQL_CLIENT

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2553
/*
2554
  Load_log_event::write_data_header()
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2555
*/
2556

2557
bool Load_log_event::write_data_header(IO_CACHE* file)
2558
{
2559
  char buf[LOAD_HEADER_LEN];
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2560
  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
2561 2562 2563 2564 2565
  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);
2566
  return my_b_safe_write(file, (byte*)buf, LOAD_HEADER_LEN) != 0;
2567
}
2568

2569

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2570
/*
2571
  Load_log_event::write_data_body()
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2572
*/
2573

2574
bool Load_log_event::write_data_body(IO_CACHE* file)
2575
{
2576 2577 2578
  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
2579
  {
2580 2581 2582
    if (my_b_safe_write(file, (byte*)field_lens, num_fields) ||
	my_b_safe_write(file, (byte*)fields, field_block_len))
      return 1;
2583
  }
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  return (my_b_safe_write(file, (byte*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (byte*)db, db_len + 1) ||
	  my_b_safe_write(file, (byte*)fname, fname_len));
2587 2588
}

2589

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2590
/*
2591
  Load_log_event::Load_log_event()
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2592
*/
2593

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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,
2597
			       enum enum_duplicates handle_dup,
2598
			       bool ignore, bool using_trans)
2599 2600 2601
  :Log_event(thd_arg, !thd_arg->tmp_table_used ?
	     0 : LOG_EVENT_THREAD_SPECIFIC_F, using_trans),
   thread_id(thd_arg->thread_id),
2602
   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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2603 2604
   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
2605
   table_name(table_name_arg ? table_name_arg : ""),
2606
   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
2610
  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;
2627
    
2628
  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
2630
  if (ex->opt_enclosed)
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2631
    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
2632

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  sql_ex.empty_flags= 0;
2634

2635
  switch (handle_dup) {
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2636
  case DUP_REPLACE:
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2637
    sql_ex.opt_flags|= REPLACE_FLAG;
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    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
2642
  }
2643 2644
  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
2645

2646 2647 2648 2649 2650 2651 2652 2653 2654 2655
  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;
2656
    
2657
  skip_lines = ex->skip_lines;
2658

2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669
  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);
2670 2671
  }

2672 2673 2674
  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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2675
#endif /* !MYSQL_CLIENT */
2676

2677

2678
/*
2679
  Load_log_event::Load_log_event()
2680

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2681 2682 2683
  NOTE
    The caller must do buf[event_len] = 0 before he starts using the
    constructed event.
2684 2685
*/

2686 2687 2688 2689
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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2690
   table_name(0), db(0), fname(0), local_fname(FALSE)
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{
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  DBUG_ENTER("Load_log_event");
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  /*
    I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
    4.0->5.0 and 5.0->5.0 and it works.
  */
  if (event_len)
    copy_log_event(buf, event_len,
                   ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                    LOAD_HEADER_LEN + 
                    description_event->common_header_len :
                    LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
                   description_event);
  /* otherwise it's a derived class, will call copy_log_event() itself */
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2705
  DBUG_VOID_RETURN;
2706 2707
}

2708

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2709
/*
2710
  Load_log_event::copy_log_event()
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2711
*/
2712

2713
int Load_log_event::copy_log_event(const char *buf, ulong event_len,
2714 2715
                                   int body_offset,
                                   const Format_description_log_event *description_event)
2716
{
2717
  DBUG_ENTER("Load_log_event::copy_log_event");
2718
  uint data_len;
2719
  char* buf_end = (char*)buf + event_len;
2720 2721
  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
2723 2724 2725 2726 2727
  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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2729
  if ((int) event_len < body_offset)
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    DBUG_RETURN(1);
2731 2732 2733 2734
  /*
    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.
  */
2735 2736 2737
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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2738
    DBUG_RETURN(1);
2739
  
2740
  data_len = event_len - body_offset;
2741
  if (num_fields > data_len) // simple sanity check against corruption
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2742
    DBUG_RETURN(1);
2743
  for (uint i = 0; i < num_fields; i++)
2744
    field_block_len += (uint)field_lens[i] + 1;
2745

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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;
2750 2751
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
2752

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2753
  DBUG_RETURN(0);
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}


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2757
/*
2758
  Load_log_event::print()
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2759
*/
2760 2761

#ifdef MYSQL_CLIENT
2762
void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
2763
{
2764
  print(file, print_event_info, 0);
2765 2766
}

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2768
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");
2772
  if (!print_event_info->short_form)
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2773
  {
2774
    print_header(file, print_event_info);
2775
    fprintf(file, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
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	    thread_id, exec_time);
  }

2779
  bool different_db= 1;
2780
  if (db)
2781
  {
2782 2783 2784 2785 2786 2787
    /*
      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.
    */
2788
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
2789
        !commented)
2790
      memcpy(print_event_info->db, db, db_len + 1);
2791
  }
2792
  
2793
  if (db && db[0] && different_db)
2794 2795 2796
    fprintf(file, "%suse %s;\n", 
            commented ? "# " : "",
            db);
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2798 2799 2800
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"%sSET @@session.pseudo_thread_id=%lu;\n",
            commented ? "# " : "", (ulong)thread_id);
2801 2802
  fprintf(file, "%sLOAD DATA ",
          commented ? "# " : "");
2803 2804
  if (check_fname_outside_temp_buf())
    fprintf(file, "LOCAL ");
2805
  fprintf(file, "INFILE '%-*s' ", fname_len, fname);
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2806

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monty@narttu.mysql.fi committed
2807
  if (sql_ex.opt_flags & REPLACE_FLAG)
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2808
    fprintf(file," REPLACE ");
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2809
  else if (sql_ex.opt_flags & IGNORE_FLAG)
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2810 2811
    fprintf(file," IGNORE ");
  
2812
  fprintf(file, "INTO TABLE `%s`", table_name);
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2813 2814
  fprintf(file, " FIELDS TERMINATED BY ");
  pretty_print_str(file, sql_ex.field_term, sql_ex.field_term_len);
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2815

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2816 2817 2818 2819
  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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2820
     
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2821 2822
  fprintf(file, " ESCAPED BY ");
  pretty_print_str(file, sql_ex.escaped, sql_ex.escaped_len);
bk@work.mysql.com's avatar
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2823
     
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2824 2825 2826
  fprintf(file," LINES TERMINATED BY ");
  pretty_print_str(file, sql_ex.line_term, sql_ex.line_term_len);

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bk@work.mysql.com committed
2827

2828
  if (sql_ex.line_start)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2829
  {
2830
    fprintf(file," STARTING BY ");
2831
    pretty_print_str(file, sql_ex.line_start, sql_ex.line_start_len);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2832
  }
2833 2834
  if ((long) skip_lines > 0)
    fprintf(file, " IGNORE %ld LINES", (long) skip_lines);
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2835

2836 2837 2838 2839
  if (num_fields)
  {
    uint i;
    const char* field = fields;
2840 2841
    fprintf(file, " (");
    for (i = 0; i < num_fields; i++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2842
    {
2843
      if (i)
2844 2845
	fputc(',', file);
      fprintf(file, field);
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bk@work.mysql.com committed
2846
	  
2847
      field += field_lens[i]  + 1;
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2848
    }
2849 2850
    fputc(')', file);
  }
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bk@work.mysql.com committed
2851 2852

  fprintf(file, ";\n");
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2853
  DBUG_VOID_RETURN;
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bk@work.mysql.com committed
2854
}
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monty@narttu.mysql.fi committed
2855
#endif /* MYSQL_CLIENT */
2856

2857

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monty@narttu.mysql.fi committed
2858
/*
2859
  Load_log_event::set_fields()
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2860 2861 2862 2863 2864

  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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monty@narttu.mysql.fi committed
2865
*/
2866

2867
#ifndef MYSQL_CLIENT
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lars@mysql.com committed
2868
void Load_log_event::set_fields(const char* affected_db, 
2869 2870
				List<Item> &field_list,
                                Name_resolution_context *context)
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2871 2872
{
  uint i;
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2873
  const char* field = fields;
2874
  for (i= 0; i < num_fields; i++)
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monty@hundin.mysql.fi committed
2875
  {
2876 2877
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
2878
    field+= field_lens[i]  + 1;
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2879
  }
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2880
}
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2881
#endif /* !MYSQL_CLIENT */
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bk@work.mysql.com committed
2882 2883


hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
2884
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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monty@mashka.mysql.fi committed
2885 2886
/*
  Does the data loading job when executing a LOAD DATA on the slave
2887

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monty@mashka.mysql.fi committed
2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901
  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.
2902

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2903 2904 2905 2906 2907 2908 2909
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
 
  RETURN VALUE
    0           Success                                                 
    1    	Failure
*/
2910

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2911 2912
int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli, 
			       bool use_rli_only_for_errors)
2913
{
2914 2915 2916 2917
  LEX_STRING new_db;
  new_db.length= db_len;
  new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length);
  thd->set_db(new_db.str, new_db.length);
2918
  DBUG_ASSERT(thd->query == 0);
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2919
  thd->query_length= 0;                         // Should not be needed
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monty@mysql.com committed
2920
  thd->query_error= 0;
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2921
  clear_all_errors(thd, rli);
2922 2923 2924

  /* see Query_log_event::exec_event() and BUG#13360 */
  DBUG_ASSERT(!rli->m_table_map.count());
2925 2926 2927 2928
  /*
    Usually mysql_init_query() is called by mysql_parse(), but we need it here
    as the present method does not call mysql_parse().
  */
2929
  mysql_init_query(thd, 0, 0);
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monty@mysql.com committed
2930
  if (!use_rli_only_for_errors)
2931
  {
2932
    /* Saved for InnoDB, see comment in Query_log_event::exec_event() */
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monty@mysql.com committed
2933
    rli->future_group_master_log_pos= log_pos;
2934
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
2935
  }
2936 2937
 
   /*
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2938 2939 2940 2941 2942 2943 2944 2945 2946 2947
    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).
lars@mysql.com's avatar
lars@mysql.com committed
2948 2949 2950 2951 2952 2953 2954 2955 2956 2957


    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().
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2958
  */
2959
  if (rpl_filter->db_ok(thd->db))
2960
  {
2961 2962
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
2963
    thd->query_id = next_query_id();
2964
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
2965 2966 2967 2968 2969 2970
    /*
      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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2971
    mysql_reset_errors(thd, 0);
2972 2973 2974

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
2975
    tables.db= thd->strmake(thd->db, thd->db_length);
2976
    tables.alias = tables.table_name = (char*) table_name;
2977
    tables.lock_type = TL_WRITE;
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monty@narttu.mysql.fi committed
2978
    tables.updating= 1;
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bell@sanja.is.com.ua committed
2979

2980
    // the table will be opened in mysql_load    
2981
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
2982 2983 2984 2985 2986 2987 2988 2989
    {
      // 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];
2990
      char *end;
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2991
      enum enum_duplicates handle_dup;
2992
      bool ignore= 0;
2993 2994
      char *load_data_query;

2995
      /*
2996 2997
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
2998
      */
2999
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
3000
      {
3001 3002 3003 3004 3005
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
3006
      }
3007 3008 3009 3010 3011 3012 3013

      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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3014
      if (sql_ex.opt_flags & REPLACE_FLAG)
3015
      {
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3016
	handle_dup= DUP_REPLACE;
3017
      }
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monty@narttu.mysql.fi committed
3018
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3019 3020 3021 3022
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3023
      else
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monty@narttu.mysql.fi committed
3024
      {
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monty@narttu.mysql.fi committed
3025
        /*
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monty@narttu.mysql.fi committed
3026
	  When replication is running fine, if it was DUP_ERROR on the
3027
          master then we could choose IGNORE here, because if DUP_ERROR
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monty@narttu.mysql.fi committed
3028
          suceeded on master, and data is identical on the master and slave,
3029
          then there should be no uniqueness errors on slave, so IGNORE is
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3030
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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3031 3032 3033
          (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.
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3034 3035

          If reading from net (a 3.23 master), mysql_load() will change this
3036
          to IGNORE.
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3037 3038
        */
        handle_dup= DUP_ERROR;
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monty@narttu.mysql.fi committed
3039
      }
3040 3041 3042 3043 3044 3045 3046 3047 3048 3049
      /*
        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;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3050

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3051
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3052 3053 3054 3055 3056
      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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monty@narttu.mysql.fi committed
3057 3058 3059 3060 3061
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3062 3063 3064 3065 3066 3067

      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;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3068
      List<Item> field_list;
3069
      thd->main_lex.select_lex.context.resolve_in_table_list_only(&tables);
3070
      set_fields(tables.db, field_list, &thd->main_lex.select_lex.context);
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monty@narttu.mysql.fi committed
3071
      thd->variables.pseudo_thread_id= thread_id;
3072
      List<Item> set_fields;
3073 3074 3075 3076 3077 3078 3079 3080 3081
      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;
      }
3082 3083 3084 3085 3086
      /*
        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,
3087
                     handle_dup, ignore, net != 0))
3088
        thd->query_error= 1;
3089
      if (thd->cuted_fields)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3090
      {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3091
	/* log_pos is the position of the LOAD event in the master log */
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lars@mysql.com committed
3092 3093 3094 3095 3096 3097 3098
        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));
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3099
      }
3100 3101 3102
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3103 3104
  }
  else
3105 3106 3107 3108 3109 3110 3111 3112 3113
  {
    /*
      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);
  }
3114 3115

error:
3116
  thd->net.vio = 0; 
3117
  const char *remember_db= thd->db;
3118
  VOID(pthread_mutex_lock(&LOCK_thread_count));
3119
  thd->catalog= 0;
3120
  thd->set_db(NULL, 0);                   /* will free the current database */
3121
  thd->query= 0;
3122
  thd->query_length= 0;
3123
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3124 3125 3126
  close_thread_tables(thd);
  if (thd->query_error)
  {
3127
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3128 3129 3130 3131 3132 3133 3134 3135 3136
    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);       
    }
3137
    slave_print_msg(ERROR_LEVEL, rli, sql_errno,"\
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monty@narttu.mysql.fi committed
3138
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3139
                    err, (char*)table_name, print_slave_db_safe(remember_db));
3140
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3141 3142
    return 1;
  }
3143
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3144
	    
3145
  if (thd->is_fatal_error)
3146
  {
3147
    slave_print_msg(ERROR_LEVEL, rli, ER_UNKNOWN_ERROR, "\
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monty@mashka.mysql.fi committed
3148
Fatal error running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3149
                    (char*)table_name, print_slave_db_safe(remember_db));
3150 3151 3152
    return 1;
  }

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3153
  return ( use_rli_only_for_errors ? 0 : Log_event::exec_event(rli) ); 
3154
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3155
#endif
3156 3157


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3158
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3159
  Rotate_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3160
**************************************************************************/
3161

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3162
/*
3163
  Rotate_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3164
*/
3165

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3166
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3167
void Rotate_log_event::pack_info(Protocol *protocol)
3168
{
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monty@narttu.mysql.fi committed
3169
  char buf1[256], buf[22];
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monty@mashka.mysql.fi committed
3170
  String tmp(buf1, sizeof(buf1), log_cs);
3171
  tmp.length(0);
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monty@narttu.mysql.fi committed
3172
  tmp.append(new_log_ident, ident_len);
3173
  tmp.append(STRING_WITH_LEN(";pos="));
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monty@narttu.mysql.fi committed
3174 3175
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3176
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3177
#endif
3178

3179

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3180
/*
3181
  Rotate_log_event::print()
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monty@narttu.mysql.fi committed
3182
*/
3183 3184

#ifdef MYSQL_CLIENT
3185
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3186
{
3187
  char buf[22];
3188

3189
  if (print_event_info->short_form)
3190
    return;
3191
  print_header(file, print_event_info);
3192 3193 3194
  fprintf(file, "\tRotate to ");
  if (new_log_ident)
    my_fwrite(file, (byte*) new_log_ident, (uint)ident_len, 
3195
              MYF(MY_NABP | MY_WME));
3196
  fprintf(file, "  pos: %s", llstr(pos, buf));
3197
  fputc('\n', file);
3198
  fflush(file);
3199
}
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3200
#endif /* MYSQL_CLIENT */
3201 3202


3203

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3204
/*
3205
  Rotate_log_event::Rotate_log_event() (2 constructors)
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3206
*/
3207

3208 3209

#ifndef MYSQL_CLIENT
3210
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3211 3212 3213 3214 3215 3216 3217 3218
                                   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];
3219
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
3220 3221 3222 3223
  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)
3224
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3225 3226 3227 3228 3229
  DBUG_VOID_RETURN;
}
#endif


3230 3231
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
3232
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3233
{
3234
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3235
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3236 3237
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3238 3239
  uint ident_offset;
  if (event_len < header_size)
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3240
    DBUG_VOID_RETURN;
3241
  buf += header_size;
3242 3243 3244 3245
  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; 
3246
  set_if_smaller(ident_len,FN_REFLEN-1);
3247
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
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3248
  DBUG_VOID_RETURN;
3249
}
3250 3251


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3252
/*
3253
  Rotate_log_event::write()
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3254
*/
3255

3256
#ifndef MYSQL_CLIENT
3257
bool Rotate_log_event::write(IO_CACHE* file)
3258
{
3259
  char buf[ROTATE_HEADER_LEN];
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3260
  int8store(buf + R_POS_OFFSET, pos);
3261 3262 3263
  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));
3264
}
3265
#endif
3266

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3267
/*
3268 3269
  Rotate_log_event::exec_event()

3270
  Got a rotate log event from the master
3271

3272 3273 3274
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3275

3276
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3277
    in a A -> B -> A setup.
3278
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3279 3280 3281

  RETURN VALUES
    0	ok
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3282
*/
3283

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3284
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3285
int Rotate_log_event::exec_event(struct st_relay_log_info* rli)
3286
{
3287 3288 3289
  DBUG_ENTER("Rotate_log_event::exec_event");

  pthread_mutex_lock(&rli->data_lock);
3290
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3291 3292 3293 3294 3295 3296 3297 3298 3299
  /*
    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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3300 3301
    In that case, we don't want to touch the coordinates which correspond to
    the beginning of the transaction.
3302 3303
    Starting from 5.0.0, there also are some rotates from the slave itself, in
    the relay log.
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3304
  */
3305
  if (!(thd->options & OPTION_BEGIN))
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3306
  {
3307 3308
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3309 3310
    rli->group_master_log_pos= pos;
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3311 3312
    DBUG_PRINT("info", ("group_master_log_name: '%s'  "
                        "group_master_log_pos: %lu",
3313
                        rli->group_master_log_name,
3314
                        (ulong) rli->group_master_log_pos));
3315
    /*
3316 3317
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3318 3319 3320 3321 3322
      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);
3323
    set_slave_thread_default_charset(thd, rli);
3324
    thd->variables.sql_mode= global_system_variables.sql_mode;
3325 3326
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3327
  }
3328 3329 3330 3331
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
  DBUG_RETURN(0);
3332
}
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#endif
3334 3335


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3336
/**************************************************************************
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3337
	Intvar_log_event methods
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3338
**************************************************************************/
3339

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3340
/*
3341
  Intvar_log_event::pack_info()
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3342
*/
3343

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3344
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3345
void Intvar_log_event::pack_info(Protocol *protocol)
3346
{
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3347 3348
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3349
  *pos++= '=';
3350
  pos= longlong10_to_str(val, pos, -10);
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3351
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3352
}
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3353
#endif
3354

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3355

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3356
/*
3357
  Intvar_log_event::Intvar_log_event()
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3358
*/
3359

3360 3361 3362
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3363
{
3364 3365 3366
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3367 3368
}

3369

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3370
/*
3371
  Intvar_log_event::get_var_type_name()
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3372
*/
3373 3374

const char* Intvar_log_event::get_var_type_name()
3375
{
3376 3377 3378 3379 3380
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3381 3382
}

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3384
/*
3385
  Intvar_log_event::write()
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3386
*/
3387

3388
#ifndef MYSQL_CLIENT
3389
bool Intvar_log_event::write(IO_CACHE* file)
3390
{
3391 3392
  byte buf[9];
  buf[I_TYPE_OFFSET]= (byte) type;
3393
  int8store(buf + I_VAL_OFFSET, val);
3394 3395
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3396
}
3397
#endif
3398

3399

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3400
/*
3401
  Intvar_log_event::print()
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3402
*/
3403 3404

#ifdef MYSQL_CLIENT
3405
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3406
{
3407 3408 3409
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3410

3411
  if (!print_event_info->short_form)
3412
  {
3413
    print_header(file, print_event_info);
3414 3415
    fprintf(file, "\tIntvar\n");
  }
3416

3417 3418 3419 3420 3421 3422 3423 3424
  fprintf(file, "SET ");
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
3425 3426 3427 3428
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
3429 3430 3431
  }
  fprintf(file, "%s=%s;\n", msg, llstr(val,llbuff));
  fflush(file);
3432
}
3433
#endif
3434

3435

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3436
/*
3437
  Intvar_log_event::exec_event()
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3438
*/
3439

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3440
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3441
int Intvar_log_event::exec_event(struct st_relay_log_info* rli)
3442
{
3443 3444
  switch (type) {
  case LAST_INSERT_ID_EVENT:
3445 3446
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
3447 3448
    break;
  case INSERT_ID_EVENT:
3449
    thd->force_one_auto_inc_interval(val);
3450 3451
    break;
  }
3452
  rli->inc_event_relay_log_pos();
3453
  return 0;
3454
}
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3455
#endif
3456

3457

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3458
/**************************************************************************
3459
  Rand_log_event methods
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3460
**************************************************************************/
3461

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3462
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3463
void Rand_log_event::pack_info(Protocol *protocol)
3464
{
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3465 3466 3467 3468 3469
  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);
3470
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3471
}
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3472
#endif
3473 3474


3475 3476 3477
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3478
{
3479 3480 3481
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3482 3483
}

3484

3485
#ifndef MYSQL_CLIENT
3486
bool Rand_log_event::write(IO_CACHE* file)
3487
{
3488
  byte buf[16];
3489 3490
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3491 3492
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3493
}
3494
#endif
3495

3496 3497

#ifdef MYSQL_CLIENT
3498
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3499
{
3500
  char llbuff[22],llbuff2[22];
3501
  if (!print_event_info->short_form)
3502
  {
3503
    print_header(file, print_event_info);
3504
    fprintf(file, "\tRand\n");
3505
  }
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3506
  fprintf(file, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s;\n",
3507
	  llstr(seed1, llbuff),llstr(seed2, llbuff2));
3508
  fflush(file);
3509
}
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3510
#endif /* MYSQL_CLIENT */
3511

3512

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3513
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3514
int Rand_log_event::exec_event(struct st_relay_log_info* rli)
3515
{
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3516 3517
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3518
  rli->inc_event_relay_log_pos();
3519 3520
  return 0;
}
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3521
#endif /* !MYSQL_CLIENT */
3522

3523

3524 3525 3526 3527 3528 3529 3530
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3531 3532
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3533
  pos= longlong10_to_str(xid, pos, 10);
3534
  pos= strmov(pos, " */");
3535 3536 3537 3538
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

3539 3540 3541 3542 3543 3544 3545 3546
/*
  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
*/
3547 3548 3549 3550

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3551 3552 3553
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3554
  memcpy((char*) &xid, buf, sizeof(xid));
3555 3556 3557
}


3558
#ifndef MYSQL_CLIENT
3559 3560 3561 3562 3563
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
         my_b_safe_write(file, (byte*) &xid, sizeof(xid));
}
3564
#endif
3565 3566 3567


#ifdef MYSQL_CLIENT
3568
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3569
{
3570
  if (!print_event_info->short_form)
3571
  {
3572 3573 3574
    char buf[64];
    longlong10_to_str(xid, buf, 10);

3575
    print_header(file, print_event_info);
3576 3577
    fprintf(file, "\tXid = %s\n", buf);
    fflush(file);
3578
  }
3579
  fprintf(file, "COMMIT;\n");
3580 3581 3582 3583 3584 3585 3586
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::exec_event(struct st_relay_log_info* rli)
{
3587
  /* For a slave Xid_log_event is COMMIT */
3588 3589
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
3590
  return end_trans(thd, COMMIT) || Log_event::exec_event(rli);
3591 3592 3593 3594
}
#endif /* !MYSQL_CLIENT */


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3595
/**************************************************************************
3596
  User_var_log_event methods
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3597
**************************************************************************/
3598

3599
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3600 3601 3602
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
3603
  uint val_offset= 4 + name_len;
3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618
  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));
3619 3620
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
3621 3622 3623 3624 3625
      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;
3626 3627 3628 3629 3630 3631 3632 3633 3634 3635
    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;
    } 
3636
    case STRING_RESULT:
3637 3638 3639 3640 3641 3642 3643 3644 3645 3646
      /* 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
      {
3647 3648 3649
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
3650 3651
        event_len= p-buf;
      }
3652
      break;
3653
    case ROW_RESULT:
3654
    default:
3655 3656 3657 3658 3659
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
3660 3661 3662 3663
  buf[1]= '`';
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
  memcpy(buf+2, name, name_len);
3664
  protocol->store(buf, event_len, &my_charset_bin);
3665 3666
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
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3667
#endif /* !MYSQL_CLIENT */
3668 3669


3670 3671 3672 3673
User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3674
{
3675
  buf+= description_event->common_header_len;
3676 3677
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
3678 3679
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
3680 3681 3682
  if (is_null)
  {
    type= STRING_RESULT;
3683
    charset_number= my_charset_bin.number;
3684 3685 3686 3687 3688
    val_len= 0;
    val= 0;  
  }
  else
  {
3689 3690 3691
    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 + 
3692
		       UV_CHARSET_NUMBER_SIZE);
3693 3694
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
3695 3696 3697 3698
  }
}


3699
#ifndef MYSQL_CLIENT
3700
bool User_var_log_event::write(IO_CACHE* file)
3701 3702 3703 3704
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
3705
  char buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
3706
  uint buf1_length;
3707
  ulong event_length;
3708

3709
  int4store(buf, name_len);
3710 3711 3712 3713 3714 3715 3716
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
    val_len= 0;
  }    
  else
3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727
  {
    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;
3728 3729 3730 3731 3732 3733
    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;
3734
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
3735 3736 3737
      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
3738 3739 3740
    case STRING_RESULT:
      pos= val;
      break;
3741
    case ROW_RESULT:
3742
    default:
3743 3744 3745
      DBUG_ASSERT(1);
      return 0;
    }
3746 3747
    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
3748
  }
3749 3750 3751 3752 3753 3754

  /* 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))   ||
3755 3756 3757
	  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));
3758
}
3759
#endif
3760

3761

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3762
/*
3763
  User_var_log_event::print()
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3764
*/
3765 3766

#ifdef MYSQL_CLIENT
3767
void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3768
{
3769
  if (!print_event_info->short_form)
3770
  {
3771
    print_header(file, print_event_info);
3772 3773 3774
    fprintf(file, "\tUser_var\n");
  }

3775
  fprintf(file, "SET @`");
3776
  my_fwrite(file, (byte*) name, (uint) (name_len), MYF(MY_NABP | MY_WME));
3777
  fprintf(file, "`");
3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795

  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;
3796 3797 3798 3799 3800 3801
    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
3802 3803
      decimal_digit_t dec_buf[10];
      decimal_t dec;
3804 3805 3806 3807 3808 3809
      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;
3810
      fprintf(file, ":=%s;\n",str_buf);
3811 3812
      break;
    }
3813
    case STRING_RESULT:
3814
    {
3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828
      /*
        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.
      */
3829 3830 3831 3832
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
3833
        break; // no error, as we are 'void'
3834
      str_to_hex(hex_str, val, val_len);
3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847
      /*
        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
3848
        fprintf(file, ":=_%s %s COLLATE `%s`;\n", cs->csname, hex_str, cs->name);
3849
      my_afree(hex_str);
3850
    }
3851
      break;
3852
    case ROW_RESULT:
3853
    default:
3854
      DBUG_ASSERT(1);
3855 3856 3857 3858 3859
      return;
    }
  }
  fflush(file);
}
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#endif
3861

3862

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3863
/*
3864
  User_var_log_event::exec_event()
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3865
*/
3866

3867
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3868 3869 3870
int User_var_log_event::exec_event(struct st_relay_log_info* rli)
{
  Item *it= 0;
3871 3872 3873
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
3874 3875 3876
  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
3877 3878
  double real_val;
  longlong int_val;
3879 3880 3881 3882 3883 3884 3885 3886 3887 3888

  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
3889
      it= new Item_float(real_val);
3890
      val= (char*) &real_val;		// Pointer to value in native format
3891
      val_len= 8;
3892 3893
      break;
    case INT_RESULT:
3894 3895 3896
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
3897
      val_len= 8;
3898
      break;
3899 3900 3901 3902 3903 3904 3905 3906
    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;
    }
3907 3908 3909
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
3910
    case ROW_RESULT:
3911
    default:
3912 3913 3914 3915 3916
      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
3917 3918 3919 3920
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
3921
  e.fix_fields(thd, 0);
3922 3923 3924 3925 3926
  /*
    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.
   */
3927
  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT);
3928
  free_root(thd->mem_root,0);
3929

3930
  rli->inc_event_relay_log_pos();
3931 3932
  return 0;
}
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3933
#endif /* !MYSQL_CLIENT */
3934 3935


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3936
/**************************************************************************
3937
  Slave_log_event methods
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3938
**************************************************************************/
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3940
#ifdef HAVE_REPLICATION
3941
#ifdef MYSQL_CLIENT
3942
void Unknown_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3943
{
3944
  if (print_event_info->short_form)
3945
    return;
3946
  print_header(file, print_event_info);
3947 3948 3949 3950
  fputc('\n', file);
  fprintf(file, "# %s", "Unknown event\n");
}
#endif  
3951

3952
#ifndef MYSQL_CLIENT
3953
void Slave_log_event::pack_info(Protocol *protocol)
3954
{
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3955
  char buf[256+HOSTNAME_LENGTH], *pos;
3956 3957 3958 3959 3960 3961 3962
  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=");
3963
  pos= longlong10_to_str(master_pos, pos, 10);
3964
  protocol->store(buf, pos-buf, &my_charset_bin);
3965
}
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#endif /* !MYSQL_CLIENT */
3967 3968 3969 3970


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
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3971
				 struct st_relay_log_info* rli)
3972
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
3973 3974 3975 3976
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
3977

3978 3979 3980 3981 3982
  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);
3983
  master_log_len = strlen(rli->group_master_log_name);
3984 3985 3986
  // 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))))
3987
  {
3988 3989 3990
    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;
3991
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
3992
    master_port = mi->port;
3993
    master_pos = rli->group_master_log_pos;
3994 3995
    DBUG_PRINT("info", ("master_log: %s  pos: %d", master_log,
			(ulong) master_pos));
3996
  }
3997 3998 3999 4000 4001 4002
  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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4003
#endif /* !MYSQL_CLIENT */
4004 4005 4006 4007 4008 4009 4010 4011 4012


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


#ifdef MYSQL_CLIENT
4013
void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4014 4015
{
  char llbuff[22];
4016
  if (print_event_info->short_form)
4017
    return;
4018
  print_header(file, print_event_info);
4019
  fputc('\n', file);
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4020 4021
  fprintf(file, "\
Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
4022 4023
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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4024
#endif /* MYSQL_CLIENT */
4025 4026 4027 4028 4029 4030 4031 4032


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


4033
#ifndef MYSQL_CLIENT
4034
bool Slave_log_event::write(IO_CACHE* file)
4035
{
4036
  ulong event_length= get_data_size();
4037 4038 4039
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4040 4041 4042

  return (write_header(file, event_length) ||
          my_b_safe_write(file, (byte*) mem_pool, event_length));
4043
}
4044
#endif
4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055


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)
4056
  {
4057 4058
    master_host = 0;
    return;
4059
  }
4060 4061
  master_log_len = strlen(master_log);
}
4062

4063

4064 4065 4066
/* 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)
4067
{
4068
  if (event_len < LOG_EVENT_HEADER_LEN)
4069
    return;
4070
  event_len -= LOG_EVENT_HEADER_LEN;
4071 4072 4073 4074 4075
  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);
4076 4077
}

4078

4079 4080 4081 4082 4083 4084 4085
#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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4086
#endif /* !MYSQL_CLIENT */
4087 4088


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/**************************************************************************
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4090
	Stop_log_event methods
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4091
**************************************************************************/
4092

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4093
/*
4094
  Stop_log_event::print()
4095
*/
4096 4097

#ifdef MYSQL_CLIENT
4098
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4099
{
4100
  if (print_event_info->short_form)
4101 4102
    return;

4103
  print_header(file, print_event_info);
4104 4105
  fprintf(file, "\tStop\n");
  fflush(file);
4106
}
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4107
#endif /* MYSQL_CLIENT */
4108

4109

4110
/*
4111
  Stop_log_event::exec_event()
4112

4113
  The master stopped.
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4114
  We used to clean up all temporary tables but this is useless as, as the
4115 4116
  master has shut down properly, it has written all DROP TEMPORARY TABLE
  (prepared statements' deletion is TODO only when we binlog prep stmts).
4117 4118 4119
  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.
4120
  The place were we must do this cleaning is in Start_log_event_v3::exec_event(),
4121
  not here. Because if we come here, the master was sane.
4122 4123
*/

4124
#ifndef MYSQL_CLIENT
4125
int Stop_log_event::exec_event(struct st_relay_log_info* rli)
4126
{
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4127 4128
  /*
    We do not want to update master_log pos because we get a rotate event
4129
    before stop, so by now group_master_log_name is set to the next log.
4130
    If we updated it, we will have incorrect master coordinates and this
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4131
    could give false triggers in MASTER_POS_WAIT() that we have reached
4132
    the target position when in fact we have not.
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4133
  */
4134 4135 4136 4137 4138 4139 4140
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4141 4142
  return 0;
}
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4143
#endif /* !MYSQL_CLIENT */
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4144
#endif /* HAVE_REPLICATION */
4145

4146

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4147
/**************************************************************************
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4148
	Create_file_log_event methods
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4149
**************************************************************************/
4150 4151

/*
4152
  Create_file_log_event ctor
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4153
*/
4154 4155

#ifndef MYSQL_CLIENT
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4156 4157 4158 4159
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,
4160
                      bool ignore,
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4161
		      char* block_arg, uint block_len_arg, bool using_trans)
4162
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4163
		  using_trans),
4164
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4165
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4166
{
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4167
  DBUG_ENTER("Create_file_log_event");
4168
  sql_ex.force_new_format();
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4169
  DBUG_VOID_RETURN;
4170
}
4171

4172

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4173
/*
4174
  Create_file_log_event::write_data_body()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4175
*/
4176

4177
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4178
{
4179 4180
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4181 4182
    return res;
  return (my_b_safe_write(file, (byte*) "", 1) ||
4183
          my_b_safe_write(file, (byte*) block, block_len));
4184 4185
}

4186

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4187
/*
4188
  Create_file_log_event::write_data_header()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4189
*/
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4190

4191
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4192
{
4193
  bool res;
4194
  byte buf[CREATE_FILE_HEADER_LEN];
4195 4196
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4197
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4198
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4199 4200 4201
}


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monty@narttu.mysql.fi committed
4202
/*
4203
  Create_file_log_event::write_base()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4204
*/
4205

4206
bool Create_file_log_event::write_base(IO_CACHE* file)
4207
{
4208 4209 4210 4211
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4212 4213 4214
  return res;
}

4215
#endif /* !MYSQL_CLIENT */
4216

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monty@narttu.mysql.fi committed
4217
/*
4218
  Create_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4219
*/
4220

4221 4222 4223
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)
4224
{
4225 4226 4227 4228 4229
  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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monty@mysql.com committed
4230
  if (!(event_buf= my_memdup((byte*) buf, len, MYF(MY_WME))) ||
4231 4232 4233 4234 4235 4236 4237
      copy_log_event(event_buf,len,
                     ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                      load_header_len + header_len :
                      (fake_base ? (header_len+load_header_len) :
                       (header_len+load_header_len) +
                       create_file_header_len)),
                     description_event))
monty@mysql.com's avatar
monty@mysql.com committed
4238
    DBUG_VOID_RETURN;
4239
  if (description_event->binlog_version!=1)
4240
  {
4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257
    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);
4258 4259 4260 4261 4262 4263 4264 4265 4266
    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;
4267
  }
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monty@mysql.com committed
4268
  DBUG_VOID_RETURN;
4269 4270
}

4271

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4272
/*
4273
  Create_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4274
*/
4275 4276

#ifdef MYSQL_CLIENT
4277
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
lars@mysql.com's avatar
lars@mysql.com committed
4278
				  bool enable_local)
nick@mysql.com's avatar
nick@mysql.com committed
4279
{
4280
  if (print_event_info->short_form)
4281 4282
  {
    if (enable_local && check_fname_outside_temp_buf())
4283
      Load_log_event::print(file, print_event_info);
4284
    return;
4285 4286 4287 4288
  }

  if (enable_local)
  {
4289
    Load_log_event::print(file, print_event_info,
4290
			  !check_fname_outside_temp_buf());
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4291 4292 4293 4294 4295
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
    fprintf(file, "#"); 
4296 4297
  }

4298
  fprintf(file, " file_id: %d  block_len: %d\n", file_id, block_len);
nick@mysql.com's avatar
nick@mysql.com committed
4299
}
4300

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monty@mashka.mysql.fi committed
4301

4302
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4303
{
4304
  print(file, print_event_info, 0);
4305
}
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monty@mashka.mysql.fi committed
4306
#endif /* MYSQL_CLIENT */
nick@mysql.com's avatar
nick@mysql.com committed
4307

4308

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4309
/*
4310
  Create_file_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4311
*/
4312

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SCRUM  
hf@deer.mysql.r18.ru committed
4313
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4314
void Create_file_log_event::pack_info(Protocol *protocol)
4315
{
4316 4317 4318
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4319
  pos= strmov(pos + db_len, ";table=");
4320
  memcpy(pos, table_name, table_name_len);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4321
  pos= strmov(pos + table_name_len, ";file_id=");
4322 4323 4324
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4325
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4326
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4327
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4328 4329


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4330
/*
4331
  Create_file_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4332
*/
4333

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4334
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4335
int Create_file_log_event::exec_event(struct st_relay_log_info* rli)
4336
{
4337 4338
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4339 4340 4341
  int fd = -1;
  IO_CACHE file;
  int error = 1;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4342

4343
  bzero((char*)&file, sizeof(file));
4344 4345
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4346
  thd->proc_info= proc_info;
4347 4348 4349 4350
  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 ||
4351 4352 4353
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4354 4355
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4356 4357 4358 4359
    goto err;
  }
  
  // a trick to avoid allocating another buffer
4360 4361
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4362 4363
  if (write_base(&file))
  {
4364
    strmov(ext, ".info"); // to have it right in the error message
4365 4366 4367
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in Create_file event: could not write to file '%s'",
                    fname_buf);
4368 4369 4370 4371 4372 4373
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4374 4375 4376 4377
  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)
4378
  {
4379 4380
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "could not open file '%s'", fname_buf);
4381 4382
    goto err;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4383
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4384
  {
4385 4386
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Create_file event: "
                    "write to '%s' failed", fname_buf);
4387 4388
    goto err;
  }
4389 4390
  error=0;					// Everything is ok

4391 4392 4393 4394 4395
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
4396
  thd->proc_info= 0;
4397
  return error ? 1 : Log_event::exec_event(rli);
4398
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4399
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4400

4401

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monty@mashka.mysql.fi committed
4402
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4403
	Append_block_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4404
**************************************************************************/
4405

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4406
/*
4407
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4408
*/
4409 4410

#ifndef MYSQL_CLIENT  
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monty@narttu.mysql.fi committed
4411 4412
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4413 4414 4415
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4416
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4417 4418
{
}
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4419
#endif
4420 4421


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4422
/*
4423
  Append_block_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4424
*/
4425

4426 4427 4428
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)
4429
{
4430 4431 4432 4433 4434 4435
  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
4436
    DBUG_VOID_RETURN;
4437 4438 4439
  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
4440
  DBUG_VOID_RETURN;
4441 4442 4443
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4444
/*
4445
  Append_block_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4446
*/
4447

4448
#ifndef MYSQL_CLIENT
4449
bool Append_block_log_event::write(IO_CACHE* file)
4450 4451 4452
{
  byte buf[APPEND_BLOCK_HEADER_LEN];
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4453 4454
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4455 4456
	  my_b_safe_write(file, (byte*) block, block_len));
}
4457
#endif
4458 4459


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4460
/*
4461
  Append_block_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4462
*/
4463 4464

#ifdef MYSQL_CLIENT  
lars@mysql.com's avatar
lars@mysql.com committed
4465
void Append_block_log_event::print(FILE* file,
4466
				   PRINT_EVENT_INFO* print_event_info)
4467
{
4468
  if (print_event_info->short_form)
4469
    return;
4470
  print_header(file, print_event_info);
4471
  fputc('\n', file);
4472 4473
  fprintf(file, "#%s: file_id: %d  block_len: %d\n",
	  get_type_str(), file_id, block_len);
4474
}
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4475
#endif /* MYSQL_CLIENT */
4476 4477


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4478
/*
4479
  Append_block_log_event::pack_info()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4480
*/
4481

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4482
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4483
void Append_block_log_event::pack_info(Protocol *protocol)
4484 4485 4486 4487 4488 4489
{
  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
4490
  protocol->store(buf, length, &my_charset_bin);
4491 4492 4493
}


4494
/*
4495
  Append_block_log_event::get_create_or_append()
4496 4497
*/

4498
int Append_block_log_event::get_create_or_append() const
4499
{
4500
  return 0; /* append to the file, fail if not exists */
4501 4502
}

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4503
/*
4504
  Append_block_log_event::exec_event()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4505
*/
4506

4507
int Append_block_log_event::exec_event(struct st_relay_log_info* rli)
4508
{
4509
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
4510
  int fd;
4511
  int error = 1;
monty@mysql.com's avatar
monty@mysql.com committed
4512
  DBUG_ENTER("Append_block_log_event::exec_event");
4513

4514 4515
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
4516
  thd->proc_info= proc_info;
4517 4518 4519 4520 4521 4522 4523
  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)
    {
4524 4525 4526
      slave_print_msg(ERROR_LEVEL, rli, my_errno,
                      "Error in %s event: could not create file '%s'",
                      get_type_str(), fname);
4527 4528 4529
      goto err;
    }
  }
4530 4531
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
4532
  {
4533 4534 4535
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: could not open file '%s'",
                    get_type_str(), fname);
4536 4537
    goto err;
  }
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monty@hundin.mysql.fi committed
4538
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
4539
  {
4540 4541 4542
    slave_print_msg(ERROR_LEVEL, rli, my_errno,
                    "Error in %s event: write to '%s' failed",
                    get_type_str(), fname);
4543 4544 4545
    goto err;
  }
  error=0;
4546

4547 4548 4549
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
4550
  thd->proc_info= 0;
monty@mysql.com's avatar
monty@mysql.com committed
4551
  DBUG_RETURN(error ? error : Log_event::exec_event(rli));
4552
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
4553
#endif
4554 4555


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4556
/**************************************************************************
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4557
	Delete_file_log_event methods
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4558
**************************************************************************/
4559

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4560
/*
4561
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4562
*/
4563 4564

#ifndef MYSQL_CLIENT
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monty@narttu.mysql.fi committed
4565 4566 4567
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)
4568 4569
{
}
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monty@narttu.mysql.fi committed
4570
#endif
4571

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monty@narttu.mysql.fi committed
4572
/*
4573
  Delete_file_log_event ctor
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4574
*/
4575

4576 4577 4578
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)
4579
{
4580 4581 4582
  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))
4583
    return;
4584
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
4585 4586 4587
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4588
/*
4589
  Delete_file_log_event::write()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4590
*/
4591

4592
#ifndef MYSQL_CLIENT
4593
bool Delete_file_log_event::write(IO_CACHE* file)
4594 4595 4596
{
 byte buf[DELETE_FILE_HEADER_LEN];
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
4597 4598
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
4599
}
4600
#endif
4601 4602


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4603
/*
4604
  Delete_file_log_event::print()
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
4605
*/
4606 4607

#ifdef MYSQL_CLIENT  
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lars@mysql.com committed
4608
void Delete_file_log_event::print(FILE* file,
4609
				  PRINT_EVENT_INFO* print_event_info)
4610
{
4611
  if (print_event_info->short_form)
4612
    return;
4613
  print_header(file, print_event_info);
4614 4615 4616
  fputc('\n', file);
  fprintf(file, "#Delete_file: file_id=%u\n", file_id);
}
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4617
#endif /* MYSQL_CLIENT */
4618

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monty@narttu.mysql.fi committed
4619
/*
4620
  Delete_file_log_event::pack_info()
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4621
*/
4622

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SCRUM  
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4623
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4624
void Delete_file_log_event::pack_info(Protocol *protocol)
4625 4626 4627 4628
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4629
  protocol->store(buf, (int32) length, &my_charset_bin);
4630
}
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4631
#endif
4632

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4633
/*
4634
  Delete_file_log_event::exec_event()
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4635
*/
4636

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SCRUM  
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4637
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4638 4639 4640
int Delete_file_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
4641
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
4642
  (void) my_delete(fname, MYF(MY_WME));
4643
  strmov(ext, ".info");
4644 4645 4646
  (void) my_delete(fname, MYF(MY_WME));
  return Log_event::exec_event(rli);
}
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4647
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4648 4649


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4650
/**************************************************************************
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monty@narttu.mysql.fi committed
4651
	Execute_load_log_event methods
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monty@mashka.mysql.fi committed
4652
**************************************************************************/
4653

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monty@narttu.mysql.fi committed
4654
/*
4655
  Execute_load_log_event ctor
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4656
*/
4657 4658

#ifndef MYSQL_CLIENT  
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4659 4660 4661
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)
4662 4663
{
}
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4664
#endif
4665 4666
  

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4667
/*
4668
  Execute_load_log_event ctor
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4669
*/
4670

4671 4672 4673
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)
4674
{
4675 4676 4677
  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))
4678
    return;
4679
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
4680 4681 4682
}


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monty@narttu.mysql.fi committed
4683
/*
4684
  Execute_load_log_event::write()
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monty@narttu.mysql.fi committed
4685
*/
4686

4687
#ifndef MYSQL_CLIENT
4688
bool Execute_load_log_event::write(IO_CACHE* file)
4689 4690 4691
{
  byte buf[EXEC_LOAD_HEADER_LEN];
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
4692 4693
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
4694
}
4695
#endif
4696 4697


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4698
/*
4699
  Execute_load_log_event::print()
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4700
*/
4701 4702

#ifdef MYSQL_CLIENT  
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lars@mysql.com committed
4703
void Execute_load_log_event::print(FILE* file,
4704
				   PRINT_EVENT_INFO* print_event_info)
4705
{
4706
  if (print_event_info->short_form)
4707
    return;
4708
  print_header(file, print_event_info);
4709 4710 4711 4712
  fputc('\n', file);
  fprintf(file, "#Exec_load: file_id=%d\n",
	  file_id);
}
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4713
#endif
4714

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4715
/*
4716
  Execute_load_log_event::pack_info()
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4717
*/
4718

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4719
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4720
void Execute_load_log_event::pack_info(Protocol *protocol)
4721 4722 4723 4724
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
4725
  protocol->store(buf, (int32) length, &my_charset_bin);
4726 4727 4728
}


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monty@narttu.mysql.fi committed
4729
/*
4730
  Execute_load_log_event::exec_event()
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4731
*/
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4732

4733
int Execute_load_log_event::exec_event(struct st_relay_log_info* rli)
4734 4735
{
  char fname[FN_REFLEN+10];
4736
  char *ext;
4737
  int fd;
4738
  int error= 1;
4739
  IO_CACHE file;
4740
  Load_log_event *lev= 0;
4741

4742
  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
4743 4744
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
4745 4746 4747
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4748 4749
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Error in Exec_load event: "
                    "could not open file '%s'", fname);
4750 4751
    goto err;
  }
4752
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
4753 4754
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
4755
      lev->get_type_code() != NEW_LOAD_EVENT)
4756
  {
4757 4758
    slave_print_msg(ERROR_LEVEL, rli, 0, "Error in Exec_load event: "
                    "file '%s' appears corrupted", fname);
4759 4760
    goto err;
  }
4761

4762
  lev->thd = thd;
4763 4764
  /*
    lev->exec_event should use rli only for errors
4765 4766 4767
    i.e. should not advance rli's position.
    lev->exec_event is the place where the table is loaded (it calls
    mysql_load()).
4768
  */
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guilhem@mysql.com committed
4769

4770
  rli->future_group_master_log_pos= log_pos;
4771
  if (lev->exec_event(0,rli,1)) 
4772
  {
4773 4774 4775 4776 4777 4778 4779 4780 4781
    /*
      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));
4782 4783
    if (tmp)
    {
4784 4785 4786 4787
      slave_print_msg(ERROR_LEVEL, rli,
                      rli->last_slave_errno, /* ok to re-use error code */
                      "%s. Failed executing load from '%s'", 
                      tmp, fname);
4788 4789
      my_free(tmp,MYF(0));
    }
4790 4791
    goto err;
  }
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4792 4793 4794 4795 4796 4797 4798 4799 4800 4801
  /*
    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;
  }
4802
  (void) my_delete(fname, MYF(MY_WME));
4803
  memcpy(ext, ".data", 6);
4804
  (void) my_delete(fname, MYF(MY_WME));
4805
  error = 0;
4806

4807 4808 4809
err:
  delete lev;
  if (fd >= 0)
4810
  {
4811
    my_close(fd, MYF(0));
4812 4813
    end_io_cache(&file);
  }
4814
  return error ? error : Log_event::exec_event(rli);
4815
}
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4817
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4818 4819


4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844
/**************************************************************************
	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)
4845
int Begin_load_query_log_event::get_create_or_append() const
4846
{
4847
  return 1; /* create the file */
4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901
}
#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;
}


4902
#ifndef MYSQL_CLIENT
4903 4904 4905 4906 4907 4908 4909 4910 4911 4912
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);
}
4913
#endif
4914 4915 4916


#ifdef MYSQL_CLIENT
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4917
void Execute_load_query_log_event::print(FILE* file,
4918
                                         PRINT_EVENT_INFO* print_event_info)
4919
{
4920
  print(file, print_event_info, 0);
4921 4922 4923
}


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lars@mysql.com committed
4924
void Execute_load_query_log_event::print(FILE* file,
4925
                                         PRINT_EVENT_INFO* print_event_info,
4926 4927
                                         const char *local_fname)
{
4928
  print_query_header(file, print_event_info);
4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948

  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");
  }

4949
  if (!print_event_info->short_form)
4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992
    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))))
  {
4993
    slave_print_msg(ERROR_LEVEL, rli, my_errno, "Not enough memory");
4994 4995 4996 4997 4998 4999
    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
5000
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
5001 5002
  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
5003
  *(p++)='\'';
5004
  switch (dup_handling) {
5005
  case LOAD_DUP_IGNORE:
5006
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
5007 5008
    break;
  case LOAD_DUP_REPLACE:
5009
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
5010 5011 5012 5013 5014
    break;
  default:
    /* Ordinary load data */
    break;
  }
5015
  p= strmake(p, STRING_WITH_LEN(" INTO"));
5016 5017 5018 5019 5020 5021 5022
  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;

5023 5024 5025 5026 5027 5028
  /*
    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));
5029 5030 5031 5032 5033 5034 5035

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


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5036
/**************************************************************************
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monty@narttu.mysql.fi committed
5037
	sql_ex_info methods
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monty@mashka.mysql.fi committed
5038
**************************************************************************/
5039

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monty@narttu.mysql.fi committed
5040
/*
5041
  sql_ex_info::write_data()
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monty@narttu.mysql.fi committed
5042
*/
5043

5044
bool sql_ex_info::write_data(IO_CACHE* file)
5045 5046 5047
{
  if (new_format())
  {
5048 5049 5050 5051 5052
    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) ||
5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064
	    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;
5065
    return my_b_safe_write(file, (byte*) &old_ex, sizeof(old_ex)) != 0;
5066 5067 5068 5069
  }
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
5070
/*
5071
  sql_ex_info::init()
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monty@narttu.mysql.fi committed
5072
*/
5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086

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.
    */
5087 5088 5089 5090 5091
    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))
5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117
      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;
}
5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129


#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),
5130
    m_row_count(0),
5131 5132
    m_table(tbl_arg),
    m_table_id(tid),
5133 5134
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0),
5135 5136
    m_flags(0)
{
5137 5138
  /*
    We allow a special form of dummy event when the table, and cols
5139
    are null and the table id is ~0UL.  This is a temporary
5140 5141
    solution, to be able to terminate a started statement in the
    binary log: the extreneous events will be removed in the future.
5142
   */
5143 5144
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5145 5146 5147 5148 5149 5150 5151 5152 5153 5154

  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)))
5155 5156 5157 5158 5159
  {
    /* 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));
  }
5160 5161 5162 5163 5164 5165 5166 5167 5168 5169
  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),
5170
    m_row_count(0),
5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197
    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);

5198 5199
  byte const *const var_start= (const byte *)buf + common_header_len + 
    post_header_len;
5200
  byte const *const ptr_width= var_start;
5201 5202
  uchar *ptr_after_width= (uchar*) ptr_width;
  m_width = net_field_length(&ptr_after_width);
5203 5204

  const uint byte_count= (m_width + 7) / 8;
5205
  const byte* const ptr_rows_data= var_start + byte_count + 1;
5206

5207
  my_size_t const data_size= event_len - (ptr_rows_data - (const byte *) buf);
5208 5209 5210
  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));

5211
  m_rows_buf= (byte*)my_malloc(data_size, MYF(MY_WME));
5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234
  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().
5235
  my_free((gptr)m_rows_buf, MYF(MY_ALLOW_ZERO_PTR));
5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246
}

#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
  */
5247 5248 5249
  DBUG_ENTER("Rows_log_event::do_add_row_data");
  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       length));
5250
  DBUG_DUMP("row_data", (const char*)row_data, min(length, 32));
5251 5252

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
5253
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
5254 5255 5256 5257 5258 5259 5260 5261
  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;
5262 5263
    my_ptrdiff_t const new_alloc= 
        block_size * ((cur_size + length) / block_size + block_size - 1);
5264

5265 5266
    byte* const new_buf= (byte*)my_realloc((gptr)m_rows_buf, new_alloc,
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286
    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;
5287
  m_row_count++;
5288 5289 5290 5291 5292 5293
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
/*
5294 5295
  Unpack a row into a record.
  
5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316
  SYNOPSIS
    unpack_row()
    rli     Relay log info
    table   Table to unpack into
    colcnt  Number of columns to read from record
    record  Record where the data should be unpacked
    row     Packed row data
    cols    Pointer to columns data to fill in
    row_end Pointer to variable that will hold the value of the
            one-after-end position for the row
    master_reclength
            Pointer to variable that will hold the length of the
            record on the master side
    rw_set  Pointer to bitmap that holds either the read_set or the
            write_set of the table

  DESCRIPTION

      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.
5317

5318 5319
      At most 'colcnt' columns are read: if the table is larger than
      that, the remaining fields are not filled in.
5320
 */
5321 5322
static int
unpack_row(RELAY_LOG_INFO *rli,
5323
           TABLE *table, uint const colcnt, byte *record,
5324
           char const *row, MY_BITMAP const *cols,
5325 5326
           char const **row_end, ulong *master_reclength,
           MY_BITMAP* const rw_set)
5327 5328
{
  DBUG_ASSERT(record && row);
5329
  my_ptrdiff_t const offset= record - (byte*) table->record[0];
5330 5331 5332 5333 5334 5335 5336 5337
  my_size_t master_null_bytes= table->s->null_bytes;

  if (colcnt != table->s->fields)
  {
    Field **fptr= &table->field[colcnt-1];
    do
      master_null_bytes= (*fptr)->last_null_byte();
    while (master_null_bytes == 0 && fptr-- > table->field);
5338

5339 5340 5341 5342 5343 5344
    if (master_null_bytes == 0)
      master_null_bytes= table->s->null_bytes;
  }

  DBUG_ASSERT(master_null_bytes <= table->s->null_bytes);
  memcpy(record, row, master_null_bytes);            // [1]
5345
  int error= 0;
5346

5347
  bitmap_set_all(rw_set);
5348

5349
  Field **const begin_ptr = table->field;
5350
  Field **field_ptr;
5351
  {
5352 5353 5354
    char const *ptr= row + master_null_bytes;
    Field **const end_ptr= begin_ptr + colcnt;
    for (field_ptr= begin_ptr ; field_ptr < end_ptr ; ++field_ptr)
5355 5356 5357 5358 5359 5360
    {
      Field *const f= *field_ptr;

      if (bitmap_is_set(cols, field_ptr -  begin_ptr))
      {
        ptr= f->unpack(f->ptr + offset, ptr);
5361 5362
        /* Field...::unpack() cannot return 0 */
        DBUG_ASSERT(ptr != NULL);
5363 5364
      }
      else
5365
        bitmap_clear_bit(rw_set, field_ptr - begin_ptr);
5366 5367 5368 5369 5370 5371
    }

    *row_end = ptr;
    if (master_reclength)
    {
      if (*field_ptr)
5372
        *master_reclength = (*field_ptr)->ptr - (char*) table->record[0];
5373 5374 5375 5376
      else
        *master_reclength = table->s->reclength;
    }
  }
5377

5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388
  /*
    Set properties for remaining columns, if there are any. We let the
    corresponding bit in the write_set be set, to write the value if
    it was not there already. We iterate over all remaining columns,
    even if there were an error, to get as many error messages as
    possible.  We are still able to return a pointer to the next row,
    so wedo that.
   */
  for ( ; *field_ptr ; ++field_ptr)
  {
    if ((*field_ptr)->flags & (NOT_NULL_FLAG | NO_DEFAULT_VALUE_FLAG))
5389
    {
5390 5391 5392 5393 5394 5395
      slave_print_msg(ERROR_LEVEL, rli, ER_NO_DEFAULT_FOR_FIELD, 
                      "Field `%s` of table `%s`.`%s` "
                      "has no default value and cannot be NULL",
                      (*field_ptr)->field_name, table->s->db.str, 
                      table->s->table_name.str);
      error = ER_NO_DEFAULT_FOR_FIELD;
5396 5397
    }
    else
5398
      (*field_ptr)->set_default();
5399
  }
5400 5401

  return error;
5402 5403 5404 5405 5406 5407
}

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;
5408
  char const *row_start= (char const *)m_rows_buf;
5409 5410

  /*
5411
    If m_table_id == ~0UL, then we have a dummy event that does
5412
    not contain any data.  In that case, we just remove all tables in
5413 5414
    the tables_to_lock list, close the thread tables, step the relay
    log position, and return with success.
5415
   */
5416
  if (m_table_id == ~0UL)
5417 5418 5419 5420 5421 5422 5423 5424
  {
    /*
       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();
5425
    close_thread_tables(thd);
5426 5427 5428 5429
    thd->clear_error();
    rli->inc_event_relay_log_pos();
    DBUG_RETURN(0);
  }
5430 5431 5432 5433 5434 5435 5436 5437

  /*
    '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);

  /*
5438 5439 5440 5441
    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.
5442
  */
5443
  if (!thd->lock)
5444
  {
5445 5446
    bool need_reopen= 1; /* To execute the first lap of the loop below */

5447
    /*
5448
      lock_tables() reads the contents of thd->lex, so they must be
5449 5450
      initialized. Contrary to in Table_map_log_event::exec_event() we don't
      call mysql_init_query() as that may reset the binlog format.
5451
    */
5452
    lex_start(thd, NULL, 0);
5453

5454 5455 5456
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
5457 5458 5459
      if (!need_reopen)
      {
        slave_print_msg(ERROR_LEVEL, rli, error,
5460 5461
                        "Error in %s event: when locking tables",
                        get_type_str());
5462
        rli->clear_tables_to_lock();
5463 5464
        DBUG_RETURN(error);
      }
5465

5466
      /*
5467
        So we need to reopen the tables.
5468

5469 5470
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
5471

5472 5473 5474
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
5475

5476 5477
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
5478 5479
       */
      thd->binlog_flush_pending_rows_event(false);
5480
      close_tables_for_reopen(thd, &rli->tables_to_lock);
5481

5482 5483
      if ((error= open_tables(thd, &rli->tables_to_lock,
                              &rli->tables_to_lock_count, 0)))
5484 5485 5486 5487 5488 5489 5490 5491 5492
      {
        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,
5493
                          "Error '%s' on reopening tables",
5494
                          (actual_error ? thd->net.last_error :
5495
                           "unexpected success or fatal error"));
5496 5497
          thd->query_error= 1;
        }
5498
        rli->clear_tables_to_lock();
5499
        DBUG_RETURN(error);
5500
      }
5501
    }
5502 5503 5504
    /*
      When the open and locking succeeded, we add all the tables to
      the table map and remove them from tables to lock.
5505 5506 5507

      We also invalidate the query cache for all the tables, since
      they will now be changed.
5508 5509
     */
    
5510 5511
    TABLE_LIST *ptr;
    for (ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
5512 5513 5514
    {
      rli->m_table_map.set_table(ptr->table_id, ptr->table);
      rli->touching_table(ptr->db, ptr->table_name, ptr->table_id);
5515
    }
5516 5517 5518
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
5519
    rli->clear_tables_to_lock();
5520 5521
  }

5522 5523
  DBUG_ASSERT(rli->tables_to_lock == NULL && rli->tables_to_lock_count == 0);

5524 5525 5526 5527 5528 5529 5530 5531 5532
  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).
    */
5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560

    /*
      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);
5561 5562
    while (error == 0 && row_start < (const char*) m_rows_end)
    {
5563 5564 5565 5566 5567
      char const *row_end= NULL;
      if ((error= do_prepare_row(thd, rli, table, row_start, &row_end)))
        break; // We should to the after-row operation even in the
               // case of error
      
5568
      DBUG_ASSERT(row_end != NULL); // cannot happen
5569
      DBUG_ASSERT(row_end <= (const char*)m_rows_end);
5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600

      /* 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)
5601 5602 5603 5604
    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
5605 5606 5607 5608
  }

  if (error)
  {                     /* error has occured during the transaction */
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
5609 5610 5611 5612 5613 5614
    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);
     /*
5615 5616 5617 5618 5619 5620 5621 5622 5623
      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.
    */
5624
    thd->reset_current_stmt_binlog_row_based();
5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667
    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.
    */

5668
    thd->reset_current_stmt_binlog_row_based();
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    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);
  }

5694
  if (table && (table->s->primary_key == MAX_KEY) && !cache_stmt)
5695 5696
  {
    /*
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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.
5711
    */
5712
    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
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  DBUG_ASSERT(m_table_id != ~0UL);
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  {
                    int4store(buf + 0, m_table_id);
                    int2store(buf + 4, m_flags);
                    return (my_b_safe_write(file, buf, 6));
                  });
  int6store(buf + RW_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + RW_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, ROWS_HEADER_LEN));
}

bool Rows_log_event::write_data_body(IO_CACHE*file)
{
  /*
     Note that this should be the number of *bits*, not the number of
     bytes.
  */
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  char sbuf[sizeof(m_width)];
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  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;

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  char *const sbuf_end= net_store_length((char*) sbuf, (uint) m_width);
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  DBUG_ASSERT(static_cast<my_size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
5750

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  return (my_b_safe_write(file, reinterpret_cast<byte*>(sbuf),
                          sbuf_end - 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

5759
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Rows_log_event::pack_info(Protocol *protocol)
{
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  char buf[256];
  char const *const flagstr=
    get_flags(STMT_END_F) ? " flags: STMT_END_F" : "";
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  my_size_t bytes= my_snprintf(buf, sizeof(buf),
                               "table_id: %lu%s", m_table_id, flagstr);
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  protocol->store(buf, bytes, &my_charset_bin);
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}
#endif

/**************************************************************************
5772
	Table_map_log_event member functions and support functions
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**************************************************************************/

/*
  Constructor used to build an event for writing to the binary log.
  Mats says tbl->s lives longer than this event so it's ok to copy pointers
  (tbl->s->db etc) and not pointer content.
 */
#if !defined(MYSQL_CLIENT)
Table_map_log_event::Table_map_log_event(THD *thd, TABLE *tbl, ulong tid,
                                         bool is_transactional, uint16 flags)
  : Log_event(thd, 0, is_transactional),
    m_table(tbl),
    m_dbnam(tbl->s->db.str),
    m_dblen(m_dbnam ? tbl->s->db.length : 0),
    m_tblnam(tbl->s->table_name.str),
    m_tbllen(tbl->s->table_name.length),
    m_colcnt(tbl->s->fields), m_coltype(0),
    m_table_id(tid),
    m_flags(flags)
{
5793
  DBUG_ASSERT(m_table_id != ~0UL);
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  /*
    In TABLE_SHARE, "db" and "table_name" are 0-terminated (see this comment in
    table.cc / alloc_table_share():
      Use the fact the key is db/0/table_name/0
    As we rely on this let's assert it.
  */
  DBUG_ASSERT((tbl->s->db.str == 0) ||
              (tbl->s->db.str[tbl->s->db.length] == 0));
  DBUG_ASSERT(tbl->s->table_name.str[tbl->s->table_name.length] == 0);


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

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

5861
  DBUG_ASSERT(m_table_id != ~0UL);
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  m_flags= uint2korr(post_start);

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

  /* Extract the length of the various parts from the buffer */
5869
  byte const* const ptr_dblen= (byte const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
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  /* Length of database name + counter + terminating null */
  byte const* const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
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  /* Length of table name + counter + terminating null */
  byte const* const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
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  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
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  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);

5942 5943
  if (memory == NULL)
    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
5944

5945
  uint 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)))
  {
    my_free((gptr) memory, MYF(MY_WME));
  }
  else
5964
  {
5965 5966 5967 5968 5969 5970
    /*
      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);
5971
    /*
5972 5973 5974
      Check if the slave is set to use SBR.  If so, it should switch
      to using RBR until the end of the "statement", i.e., next
      STMT_END_F or next error.
5975
    */
5976 5977
    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
5978
    {
5979
      thd->set_current_stmt_binlog_row_based();
5980 5981 5982 5983
    }

    /*
      Open the table if it is not already open and add the table to table map.
5984
      Note that for any table that should not be replicated, a filter is needed.
5985 5986
    */
    uint count;
5987
    if ((error= open_tables(thd, &table_list, &count, 0)))
5988
    {
5989
      if (thd->query_error || thd->is_fatal_error)
5990
      {
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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;
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        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;
6002
      }
6003
      goto err;
6004 6005
    }

6006
    m_table= table_list->table;
6007 6008 6009 6010 6011 6012 6013

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

6014 6015
    table_def const def(m_coltype, m_colcnt);
    if (def.compatible_with(rli, m_table))
6016 6017
    {
      thd->query_error= 1;
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      error= ERR_BAD_TABLE_DEF;
      goto err;
6020
      /* purecov: end */
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    }

    /*
6024 6025 6026
      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.
6027
    */
6028 6029 6030 6031
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
    rli->tables_to_lock= table_list;
    rli->tables_to_lock_count++;
    /* 'memory' is freed in clear_tables_to_lock */
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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();
6046
  DBUG_RETURN(error);
6047

6048 6049
err:
  my_free((gptr) memory, MYF(MY_WME));
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  DBUG_RETURN(error);
}
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
6057
  DBUG_ASSERT(m_table_id != ~0UL);
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  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 };

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  char cbuf[sizeof(m_colcnt)];
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  char *const cbuf_end= net_store_length((char*) cbuf, (uint) m_colcnt);
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  DBUG_ASSERT(static_cast<my_size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
6084

6085
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
6086
          my_b_safe_write(file, (const byte*)m_dbnam,   m_dblen+1) ||
6087
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
6088
          my_b_safe_write(file, (const byte*)m_tblnam,  m_tbllen+1) ||
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          my_b_safe_write(file, reinterpret_cast<byte*>(cbuf),
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                          cbuf_end - (char*) 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.
 */

6102
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
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    my_size_t bytes= my_snprintf(buf, sizeof(buf),
                                 "table_id: %lu (%s.%s)",
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                              m_table_id, m_dbnam, m_tblnam);
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    protocol->store(buf, bytes, &my_charset_bin);
}
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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;

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  table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);  // Needed for ndbcluster
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  table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);  // Needed for ndbcluster
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  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.
  */
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  table->file->ha_start_bulk_insert(0);
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  /*
    We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
    any TIMESTAMP column with data from the row but instead will use
    the event's current time.
    As we replicate from TIMESTAMP to TIMESTAMP and slave has no extra
    columns, we know that all TIMESTAMP columns on slave will receive explicit
    data from the row, so TIMESTAMP_NO_AUTO_SET is ok.
    When we allow a table without TIMESTAMP to be replicated to a table having
    more columns including a TIMESTAMP column, or when we allow a TIMESTAMP
    column to be replicated into a BIGINT column and the slave's table has a
    TIMESTAMP column, then the slave's TIMESTAMP column will take its value
    from set_time() which we called earlier (consistent with SBR). And then in
    some cases we won't want TIMESTAMP_NO_AUTO_SET (will require some code to
    analyze if explicit data is provided for slave's TIMESTAMP columns).
  */
  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)
6211
    error= table->file->ha_end_bulk_insert();
6212 6213 6214
  return error;
}

6215 6216 6217 6218
int Write_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
                                         TABLE *table,
                                         char const *row_start,
                                         char const **row_end)
6219 6220
{
  DBUG_ASSERT(table != NULL);
6221 6222 6223 6224
  DBUG_ASSERT(row_start && row_end);

  int error;
  error= unpack_row(rli,
6225
                    table, m_width, table->record[0],
6226 6227 6228
                    row_start, &m_cols, row_end, &m_master_reclength,
                    table->write_set);
  bitmap_copy(table->read_set, table->write_set);
6229
  return error;
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}

/*
  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; }
  };

}


6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347
/*
  Copy "extra" columns from record[1] to record[0].

  Copy the extra fields that are not present on the master but are
  present on the slave from record[1] to record[0].  This is used
  after fetching a record that are to be updated, either inside
  replace_record() or as part of executing an update_row().
 */
static int
copy_extra_record_fields(TABLE *table,
                         my_size_t master_reclength,
                         my_ptrdiff_t master_fields)
{
  DBUG_PRINT("info", ("Copying to %p from field %d at offset %u to field %d at offset %u", 
                      table->record[0], 
                      master_fields, master_reclength,
                      table->s->fields, table->s->reclength));
  if (master_reclength < table->s->reclength)
    bmove_align(table->record[0] + master_reclength,
                table->record[1] + master_reclength,
                table->s->reclength - master_reclength);
    
  /*
    Bit columns are special.  We iterate over all the remaining
    columns and copy the "extra" bits to the new record.  This is
    not a very good solution: it should be refactored on
    opportunity.

    REFACTORING SUGGESTION (Matz).  Introduce a member function
    similar to move_field_offset() called copy_field_offset() to
    copy field values and implement it for all Field subclasses. Use
    this function to copy data from the found record to the record
    that are going to be inserted.

    The copy_field_offset() function need to be a virtual function,
    which in this case will prevent copying an entire range of
    fields efficiently.
  */
  {
    Field **field_ptr= table->field + master_fields;
    for ( ; *field_ptr ; ++field_ptr)
    {
      /*
        Set the null bit according to the values in record[1]
       */
      if ((*field_ptr)->maybe_null() &&
          (*field_ptr)->is_null_in_record(reinterpret_cast<uchar*>(table->record[1])))
        (*field_ptr)->set_null();
      else
        (*field_ptr)->set_notnull();

      /*
        Do the extra work for special columns.
       */
      switch ((*field_ptr)->real_type())
      {
      default:
        /* Nothing to do */
        break;

      case FIELD_TYPE_BIT:
        Field_bit *f= static_cast<Field_bit*>(*field_ptr);
        my_ptrdiff_t const offset= table->record[1] - table->record[0];
        uchar const bits=
          get_rec_bits(f->bit_ptr + offset, f->bit_ofs, f->bit_len);
        set_rec_bits(bits, f->bit_ptr, f->bit_ofs, f->bit_len);
        break;
      }
    }
  }
  return 0;                                     // All OK
}

6348 6349 6350
/*
  Replace the provided record in the database.

6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366
  SYNOPSIS
      replace_record()
      thd    Thread context for writing the record.
      table  Table to which record should be written.
      master_reclength
             Offset to first column that is not present on the master,
             alternatively the length of the record on the master
             side.

  RETURN VALUE
      Error code on failure, 0 on success.

  DESCRIPTION
      Similar to how it is done in mysql_insert(), we first try to do
      a ha_write_row() and of that fails due to duplicated keys (or
      indices), we do an ha_update_row() or a ha_delete_row() instead.
6367 6368
 */
static int
6369 6370 6371
replace_record(THD *thd, TABLE *table,
               ulong const master_reclength,
               uint const master_fields)
6372
{
6373
  DBUG_ENTER("replace_record");
6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384
  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 */
6385
      DBUG_RETURN(HA_ERR_FOUND_DUPP_KEY);
6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397
    }

    /*
       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.
     */
6398
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
6399
    {
6400
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
6401
      if (error)
6402
        DBUG_RETURN(error);
6403 6404 6405 6406 6407
    }
    else
    {
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
6408
        DBUG_RETURN(my_errno);
6409 6410 6411 6412 6413 6414
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
6415
          DBUG_RETURN(ENOMEM);
6416 6417
      }

6418 6419 6420
      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(),
6421 6422 6423
                                         table->key_info[keynum].key_length,
                                         HA_READ_KEY_EXACT);
      if (error)
6424
        DBUG_RETURN(error);
6425 6426 6427 6428 6429 6430 6431
    }

    /*
       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).

6432 6433 6434
       First we copy the columns into table->record[0] that are not
       present on the master from table->record[1], if there are any.
    */
6435
    copy_extra_record_fields(table, master_reclength, master_fields);
6436 6437
    
    /*
6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456
       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]);
6457
      DBUG_RETURN(error);
6458 6459 6460 6461
    }
    else
    {
      if ((error= table->file->ha_delete_row(table->record[1])))
6462
        DBUG_RETURN(error);
6463 6464 6465
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
6466
  DBUG_RETURN(error);
6467 6468 6469 6470 6471
}

int Write_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);
6472
  int error= replace_record(thd, table, m_master_reclength, m_width);
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  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)
6494 6495 6496 6497 6498 6499
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
6500
{
6501 6502 6503 6504 6505 6506 6507 6508 6509
  if (table->s->blob_fields + table->s->varchar_fields == 0)
    return cmp_record(table,record[1]);
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
    return TRUE;				// Diff in NULL value
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
6510
  {
6511 6512
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
      return TRUE;
6513
  }
6514
  return FALSE;
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}


/*
  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.
 */
6523

6524
static int find_and_fetch_row(TABLE *table, byte *key)
6525 6526
{
  DBUG_ENTER("find_and_fetch_row(TABLE *table, byte *key, byte *record)");
6527 6528
  DBUG_PRINT("enter", ("table: 0x%lx, key: 0x%lx  record: 0x%lx",
		       (long) table, (long) key, (long) table->record[1]));
6529 6530 6531

  DBUG_ASSERT(table->in_use != NULL);

6532 6533
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
6534 6535 6536 6537 6538 6539
  {
    /*
      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
6540
      the "cursor" (i.e., record[0] in this case) at the correct row.
6541 6542 6543 6544 6545
    */
    table->file->position(table->record[0]);
    DBUG_RETURN(table->file->rnd_pos(table->record[0], table->file->ref));
  }

6546
  DBUG_ASSERT(table->record[1]);
6547

tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
6548
  /* We need to retrieve all fields */
6549 6550
  /* TODO: Move this out from this function to main loop */
  table->use_all_columns();
tomas@poseidon.ndb.mysql.com's avatar
tomas@poseidon.ndb.mysql.com committed
6551

6552 6553 6554
  if (table->s->keys > 0)
  {
    int error;
6555
    /* We have a key: search the table using the index */
6556 6557
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
      return error;
6558 6559 6560 6561 6562 6563 6564
    
    /*
      We need to set the null bytes to ensure that the filler bit are
      all set when returning.  There are storage engines that just set
      the necessary bits on the bytes and don't set the filler bits
      correctly.
    */
6565 6566 6567
    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
    table->record[1][pos]= 0xFF;
6568 6569 6570
    if ((error= table->file->index_read(table->record[1], key,
                                        table->key_info->key_length,
                                        HA_READ_KEY_EXACT)))
6571 6572
    {
      table->file->print_error(error, MYF(0));
6573
      table->file->ha_index_end();
6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589
      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.
6590
    */
6591
    if (table->key_info->flags & HA_NOSAME)
6592 6593
    {
      table->file->ha_index_end();
6594
      DBUG_RETURN(0);
6595
    }
6596

6597
    while (record_compare(table))
6598 6599
    {
      int error;
6600 6601 6602 6603 6604 6605
      /*
        We need to set the null bytes to ensure that the filler bit
        are all set when returning.  There are storage engines that
        just set the necessary bits on the bytes and don't set the
        filler bits correctly.
      */
6606 6607 6608
      my_ptrdiff_t const pos=
        table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
      table->record[1][pos]= 0xFF;
6609
      if ((error= table->file->index_next(table->record[1])))
6610 6611
      {
	table->file->print_error(error, MYF(0));
6612
        table->file->ha_index_end();
6613 6614 6615
	DBUG_RETURN(error);
      }
    }
6616 6617 6618 6619 6620

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
6621 6622 6623 6624
  }
  else
  {
    int restart_count= 0; // Number of times scanning has restarted from top
6625 6626 6627 6628 6629 6630 6631
    int error;

    /* We don't have a key: search the table using rnd_next() */
    if ((error= table->file->ha_rnd_init(1)))
      return error;

    /* Continue until we find the right record or have made a full loop */
6632 6633
    do
    {
6634 6635 6636 6637 6638 6639
      /*
        We need to set the null bytes to ensure that the filler bit
        are all set when returning.  There are storage engines that
        just set the necessary bits on the bytes and don't set the
        filler bits correctly.
      */
6640 6641 6642
      my_ptrdiff_t const pos=
        table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
      table->record[1][pos]= 0xFF;
6643
      error= table->file->rnd_next(table->record[1]);
6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656
      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));
6657
        table->file->ha_rnd_end();
6658 6659 6660
	DBUG_RETURN(error);
      }
    }
6661
    while (restart_count < 2 && record_compare(table));
6662

6663 6664 6665 6666 6667
    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_rnd_end();

6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685
    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
6686
  ,m_memory(NULL), m_key(NULL), m_after_image(NULL)
6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702
#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),
6703
    m_memory(NULL), m_key(NULL), m_after_image(NULL)
6704 6705 6706 6707 6708 6709 6710 6711 6712 6713
#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);

6714
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
6715 6716 6717
      table->s->primary_key < MAX_KEY)
  {
    /*
6718
      We don't need to allocate any memory for m_after_image and
6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729
      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),
6730
		      &m_after_image, table->s->reclength,
6731 6732 6733 6734 6735
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
6736 6737
    m_after_image= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_after_image;
6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750
    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  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
6751
  m_memory= NULL;
6752
  m_after_image= NULL;
6753
  m_key= NULL;
6754 6755 6756 6757

  return error;
}

6758 6759 6760 6761
int Delete_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
                                          TABLE *table,
                                          char const *row_start,
                                          char const **row_end)
6762
{
6763 6764
  int error;
  DBUG_ASSERT(row_start && row_end);
6765 6766 6767 6768 6769 6770
  /*
    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);

6771 6772
  error= unpack_row(rli,
                    table, m_width, table->record[0], 
6773 6774
                    row_start, &m_cols, row_end, &m_master_reclength,
                    table->read_set);
6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785
  /*
    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);
  }

6786
  return error;
6787 6788 6789 6790
}

int Delete_rows_log_event::do_exec_row(TABLE *table)
{
6791
  int error;
6792 6793
  DBUG_ASSERT(table != NULL);

6794 6795 6796 6797 6798 6799 6800 6801
  if (!(error= find_and_fetch_row(table, m_key)))
  { 
    /*
      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]);
6802
  }
6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869
  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);

  int error= 0;

  if (table->s->keys > 0)
  {
    m_memory=
      my_multi_malloc(MYF(MY_WME),
6870
		      &m_after_image, table->s->reclength,
6871 6872 6873 6874 6875
		      &m_key, table->key_info->key_length,
		      NULL);
  }
  else
  {
6876 6877
    m_after_image= (byte*)my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (gptr)m_after_image;
6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892
    m_key= NULL;
  }
  if (!m_memory)
    return HA_ERR_OUT_OF_MEM;

  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));
6893
  m_memory= NULL;
6894
  m_after_image= NULL;
6895
  m_key= NULL;
6896 6897 6898 6899

  return error;
}

6900 6901 6902 6903
int Update_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
                                          TABLE *table,
                                          char const *row_start,
                                          char const **row_end)
6904
{
6905 6906
  int error;
  DBUG_ASSERT(row_start && row_end);
6907 6908 6909 6910 6911 6912 6913
  /*
    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 */
6914 6915
  error= unpack_row(rli,
                    table, m_width, table->record[0],
6916 6917
                    row_start, &m_cols, row_end, &m_master_reclength,
                    table->read_set);
6918
  row_start = *row_end;
6919
  /* m_after_image is the after image for the update */
6920 6921
  error= unpack_row(rli,
                    table, m_width, m_after_image,
6922 6923
                    row_start, &m_cols, row_end, &m_master_reclength,
                    table->write_set);
6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935

  /*
    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);
  }

6936
  return error;
6937 6938 6939 6940 6941 6942
}

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

6943
  int error= find_and_fetch_row(table, m_key);
6944 6945 6946
  if (error)
    return error;

6947
  /*
6948 6949 6950 6951 6952 6953
    We have to ensure that the new record (i.e., the after image) is
    in record[0] and the old record (i.e., the before image) is in
    record[1].  This since some storage engines require this (for
    example, the partition engine).

    Since find_and_fetch_row() puts the fetched record (i.e., the old
6954 6955 6956 6957 6958
    record) in record[1], we can keep it there. We put the new record
    (i.e., the after image) into record[0], and copy the fields that
    are on the slave (i.e., in record[1]) into record[0], effectively
    overwriting the default values that where put there by the
    unpack_row() function.
6959
  */
6960
  bmove_align(table->record[0], m_after_image, table->s->reclength);
6961
  copy_extra_record_fields(table, m_master_reclength, m_width);
6962

6963
  /*
6964 6965 6966 6967
    Now we have the right row to update.  The old row (the one we're
    looking for) is in record[1] and the new row has is in record[0].
    We also have copied the original values already in the slave's
    database into the after image delivered from the master.
6968
  */
6969
  error= table->file->ha_update_row(table->record[1], table->record[0]);
6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988

  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) */