log_event.cc 250 KB
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/* Copyright (C) 2000-2004 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; version 2 of the License.
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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


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

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

  DESCRIPTION

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

  typedef unsigned short flag_set;

  /*
    Constructor.

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

    DESCRIPTION

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

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

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

  /*
    Return a pointer to the internal IO_CACHE.

    SYNOPSIS
      operator&()

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

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

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


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

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

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

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

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

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

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

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

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


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

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

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

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

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

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

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


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

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Log_event::Log_event()
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  :temp_buf(0), exec_time(0), flags(0), cache_stmt(0),
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   thd(0)
{
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  server_id=	::server_id;
  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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int Log_event::do_update_pos(RELAY_LOG_INFO *rli)
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{
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  /*
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    rli is null when (as far as I (Guilhem) know) the caller is
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    Load_log_event::do_apply_event *and* that one is called from
    Execute_load_log_event::do_apply_event.  In this case, we don't
    do anything here ; Execute_load_log_event::do_apply_event will
    call Log_event::do_apply_event again later with the proper rli.
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    Strictly speaking, if we were sure that rli is null only in the
    case discussed above, 'if (rli)' is useless here.  But as we are
    not 100% sure, keep it for now.
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    Matz: I don't think we will need this check with this refactoring.
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  */
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  if (rli)
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    rli->stmt_done(log_pos, when);
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  return 0;                                   // Cannot fail currently
}
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Log_event::enum_skip_reason
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Log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  DBUG_PRINT("info", ("ev->server_id=%lu, ::server_id=%lu,"
                      " rli->replicate_same_server_id=%d,"
                      " rli->slave_skip_counter=%d",
                      (ulong) server_id, (ulong) ::server_id,
                      rli->replicate_same_server_id,
                      rli->slave_skip_counter));
  if (server_id == ::server_id && !rli->replicate_same_server_id)
    return EVENT_SKIP_IGNORE;
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  else if (rli->slave_skip_counter > 0)
    return EVENT_SKIP_COUNT;
  else
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    return EVENT_SKIP_NOT;
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}
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/*
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  Log_event::pack_info()
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*/
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void Log_event::pack_info(Protocol *protocol)
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{
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  protocol->store("", &my_charset_bin);
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}


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


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/*
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  Log_event::init_show_field_list()
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*/
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void Log_event::init_show_field_list(List<Item>* field_list)
{
  field_list->push_back(new Item_empty_string("Log_name", 20));
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  field_list->push_back(new Item_return_int("Pos", MY_INT32_NUM_DECIMAL_DIGITS,
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					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Event_type", 20));
  field_list->push_back(new Item_return_int("Server_id", 10,
					    MYSQL_TYPE_LONG));
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  field_list->push_back(new Item_return_int("End_log_pos",
                                            MY_INT32_NUM_DECIMAL_DIGITS,
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					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Info", 20));
}

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/*
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  Log_event::write()
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*/
636

637
bool Log_event::write_header(IO_CACHE* file, ulong event_data_length)
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{
639
  uchar header[LOG_EVENT_HEADER_LEN];
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  DBUG_ENTER("Log_event::write_header");
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  /* Store number of bytes that will be written by this event */
  data_written= event_data_length + sizeof(header);
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  /*
    log_pos != 0 if this is relay-log event. In this case we should not
    change the position
  */
649

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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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/*
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  Log_event::read_log_event()
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  This needn't be format-tolerant, because we only read
  LOG_EVENT_MINIMAL_HEADER_LEN (we just want to read the event's length).

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*/
715

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int Log_event::read_log_event(IO_CACHE* file, String* packet,
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			      pthread_mutex_t* log_lock)
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{
  ulong data_len;
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  int result=0;
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  char buf[LOG_EVENT_MINIMAL_HEADER_LEN];
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  DBUG_ENTER("Log_event::read_log_event");
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  if (log_lock)
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    pthread_mutex_lock(log_lock);
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  if (my_b_read(file, (uchar*) buf, sizeof(buf)))
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  {
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    /*
      If the read hits eof, we must report it as eof so the caller
      will know it can go into cond_wait to be woken up on the next
      update to the log.
    */
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    DBUG_PRINT("error",("file->error: %d", file->error));
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    if (!file->error)
      result= LOG_READ_EOF;
    else
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      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
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    goto end;
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  }
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  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
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  if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN ||
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      data_len > current_thd->variables.max_allowed_packet)
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  {
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    DBUG_PRINT("error",("data_len: %ld", data_len));
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    result= ((data_len < LOG_EVENT_MINIMAL_HEADER_LEN) ? LOG_READ_BOGUS :
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	     LOG_READ_TOO_LARGE);
    goto end;
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  }
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  /* Append the log event header to packet */
  if (packet->append(buf, sizeof(buf)))
  {
    /* Failed to allocate packet */
    result= LOG_READ_MEM;
    goto end;
  }
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  data_len-= LOG_EVENT_MINIMAL_HEADER_LEN;
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  if (data_len)
  {
760
    /* Append rest of event, read directly from file into packet */
761
    if (packet->append(file, data_len))
762
    {
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      /*
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        Fatal error occured when appending rest of the event
        to packet, possible failures:
	1. EOF occured when reading from file, it's really an error
           as data_len is >=0 there's supposed to be more bytes available.
           file->error will have been set to number of bytes left to read
        2. Read was interrupted, file->error would normally be set to -1
        3. Failed to allocate memory for packet, my_errno
           will be ENOMEM(file->error shuold be 0, but since the
           memory allocation occurs before the call to read it might
           be uninitialized)
774
      */
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      result= (my_errno == ENOMEM ? LOG_READ_MEM :
               (file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO));
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      /* Implicit goto end; */
778
    }
779
  }
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end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
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  DBUG_RETURN(result);
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}
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#endif /* !MYSQL_CLIENT */
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#ifndef MYSQL_CLIENT
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#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
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#else
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#define UNLOCK_MUTEX
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#define LOCK_MUTEX
#endif

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/*
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  Log_event::read_log_event()

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  NOTE:
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    Allocates memory;  The caller is responsible for clean-up.
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*/
802

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#ifndef MYSQL_CLIENT
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Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
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                                     const Format_description_log_event *description_event)
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#else
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Log_event* Log_event::read_log_event(IO_CACHE* file,
                                     const Format_description_log_event *description_event)
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#endif
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{
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  DBUG_ENTER("Log_event::read_log_event");
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  DBUG_ASSERT(description_event != 0);
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  char head[LOG_EVENT_MINIMAL_HEADER_LEN];
  /*
    First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
    check the event for sanity and to know its length; no need to really parse
    it. We say "at most" because this could be a 3.23 master, which has header
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    of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
    "minimal" over the set {MySQL >=4.0}).
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  */
  uint header_size= min(description_event->common_header_len,
                        LOG_EVENT_MINIMAL_HEADER_LEN);
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825
  LOCK_MUTEX;
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  DBUG_PRINT("info", ("my_b_tell: %lu", (ulong) my_b_tell(file)));
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  if (my_b_read(file, (uchar *) head, header_size))
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  {
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    DBUG_PRINT("info", ("Log_event::read_log_event(IO_CACHE*,Format_desc*) \
failed my_b_read"));
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    UNLOCK_MUTEX;
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    /*
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      No error here; it could be that we are at the file's end. However
      if the next my_b_read() fails (below), it will be an error as we
      were able to read the first bytes.
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    */
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    DBUG_RETURN(0);
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  }
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  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
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  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;
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#ifndef max_allowed_packet
  THD *thd=current_thd;
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  uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0;
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#endif
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848
  if (data_len > max_allowed_packet)
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  {
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    error = "Event too big";
    goto err;
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  }

854
  if (data_len < header_size)
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  {
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    error = "Event too small";
    goto err;
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  }
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  // some events use the extra byte to null-terminate strings
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  if (!(buf = (char*) my_malloc(data_len+1, MYF(MY_WME))))
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  {
    error = "Out of memory";
    goto err;
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  }
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  buf[data_len] = 0;
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  memcpy(buf, head, header_size);
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  if (my_b_read(file, (uchar*) buf + header_size, data_len - header_size))
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  {
    error = "read error";
    goto err;
  }
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  if ((res= read_log_event(buf, data_len, &error, description_event)))
874
    res->register_temp_buf(buf);
875

876
err:
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  UNLOCK_MUTEX;
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  if (!res)
879
  {
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    DBUG_ASSERT(error != 0);
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    sql_print_error("Error in Log_event::read_log_event(): "
                    "'%s', data_len: %d, event_type: %d",
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		    error,data_len,head[EVENT_TYPE_OFFSET]);
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    my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
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    /*
      The SQL slave thread will check if file->error<0 to know
      if there was an I/O error. Even if there is no "low-level" I/O errors
      with 'file', any of the high-level above errors is worrying
      enough to stop the SQL thread now ; as we are skipping the current event,
      going on with reading and successfully executing other events can
      only corrupt the slave's databases. So stop.
    */
    file->error= -1;
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  }
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  DBUG_RETURN(res);
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}

898

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/*
900
  Log_event::read_log_event()
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  Binlog format tolerance is in (buf, event_len, description_event)
  constructors.
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*/
904

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Log_event* Log_event::read_log_event(const char* buf, uint event_len,
				     const char **error,
                                     const Format_description_log_event *description_event)
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{
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  Log_event* ev;
  DBUG_ENTER("Log_event::read_log_event(char*,...)");
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  DBUG_ASSERT(description_event != 0);
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  DBUG_PRINT("info", ("binlog_version: %d", description_event->binlog_version));
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  /* Check the integrity */
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  if (event_len < EVENT_LEN_OFFSET ||
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      buf[EVENT_TYPE_OFFSET] >= ENUM_END_EVENT ||
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      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
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    DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
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  }
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922
  switch(buf[EVENT_TYPE_OFFSET]) {
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  case QUERY_EVENT:
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    ev  = new Query_log_event(buf, event_len, description_event, QUERY_EVENT);
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    break;
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  case LOAD_EVENT:
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    ev = new Load_log_event(buf, event_len, description_event);
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    break;
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  case NEW_LOAD_EVENT:
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    ev = new Load_log_event(buf, event_len, description_event);
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    break;
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  case ROTATE_EVENT:
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    ev = new Rotate_log_event(buf, event_len, description_event);
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    break;
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#ifdef HAVE_REPLICATION
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  case SLAVE_EVENT: /* can never happen (unused event) */
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    ev = new Slave_log_event(buf, event_len);
    break;
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#endif /* HAVE_REPLICATION */
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  case CREATE_FILE_EVENT:
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    ev = new Create_file_log_event(buf, event_len, description_event);
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    break;
  case APPEND_BLOCK_EVENT:
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    ev = new Append_block_log_event(buf, event_len, description_event);
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    break;
  case DELETE_FILE_EVENT:
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    ev = new Delete_file_log_event(buf, event_len, description_event);
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    break;
  case EXEC_LOAD_EVENT:
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    ev = new Execute_load_log_event(buf, event_len, description_event);
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    break;
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  case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
    ev = new Start_log_event_v3(buf, description_event);
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    break;
  case STOP_EVENT:
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    ev = new Stop_log_event(buf, description_event);
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    break;
  case INTVAR_EVENT:
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    ev = new Intvar_log_event(buf, description_event);
960
    break;
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  case XID_EVENT:
    ev = new Xid_log_event(buf, description_event);
    break;
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  case RAND_EVENT:
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    ev = new Rand_log_event(buf, description_event);
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    break;
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  case USER_VAR_EVENT:
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    ev = new User_var_log_event(buf, description_event);
    break;
  case FORMAT_DESCRIPTION_EVENT:
    ev = new Format_description_log_event(buf, event_len, description_event); 
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    break;
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#if defined(HAVE_REPLICATION) 
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  case PRE_GA_WRITE_ROWS_EVENT:
    ev = new Write_rows_log_event_old(buf, event_len, description_event);
    break;
  case PRE_GA_UPDATE_ROWS_EVENT:
    ev = new Update_rows_log_event_old(buf, event_len, description_event);
    break;
  case PRE_GA_DELETE_ROWS_EVENT:
    ev = new Delete_rows_log_event_old(buf, event_len, description_event);
    break;
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  case WRITE_ROWS_EVENT:
    ev = new Write_rows_log_event(buf, event_len, description_event);
    break;
  case UPDATE_ROWS_EVENT:
    ev = new Update_rows_log_event(buf, event_len, description_event);
    break;
  case DELETE_ROWS_EVENT:
    ev = new Delete_rows_log_event(buf, event_len, description_event);
    break;
  case TABLE_MAP_EVENT:
    ev = new Table_map_log_event(buf, event_len, description_event);
    break;
#endif
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  case BEGIN_LOAD_QUERY_EVENT:
    ev = new Begin_load_query_log_event(buf, event_len, description_event);
    break;
  case EXECUTE_LOAD_QUERY_EVENT:
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    ev= new Execute_load_query_log_event(buf, event_len, description_event);
    break;
  case INCIDENT_EVENT:
    ev = new Incident_log_event(buf, event_len, description_event);
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    break;
1005
  default:
1006 1007
    DBUG_PRINT("error",("Unknown event code: %d",
                        (int) buf[EVENT_TYPE_OFFSET]));
1008
    ev= NULL;
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    break;
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  }
1011

1012 1013 1014 1015
  DBUG_PRINT("read_event", ("%s(type_code: %d; event_len: %d)",
                            ev ? ev->get_type_str() : "<unknown>",
                            buf[EVENT_TYPE_OFFSET],
                            event_len));
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  /*
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    is_valid() are small event-specific sanity tests which are
    important; for example there are some my_malloc() in constructors
    (e.g. Query_log_event::Query_log_event(char*...)); when these
    my_malloc() fail we can't return an error out of the constructor
    (because constructor is "void") ; so instead we leave the pointer we
    wanted to allocate (e.g. 'query') to 0 and we test it in is_valid().
    Same for Format_description_log_event, member 'post_header_len'.
1024
  */
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  if (!ev || !ev->is_valid())
1026
  {
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    DBUG_PRINT("error",("Found invalid event in binary log"));

1029
    delete ev;
1030
#ifdef MYSQL_CLIENT
1031
    if (!force_opt) /* then mysqlbinlog dies */
1032 1033
    {
      *error= "Found invalid event in binary log";
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      DBUG_RETURN(0);
1035
    }
1036
    ev= new Unknown_log_event(buf, description_event);
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#else
    *error= "Found invalid event in binary log";
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    DBUG_RETURN(0);
1040
#endif
1041
  }
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  DBUG_RETURN(ev);  
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}

1045
#ifdef MYSQL_CLIENT
1046

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/*
1048
  Log_event::print_header()
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*/
1050

1051 1052 1053
void Log_event::print_header(IO_CACHE* file,
                             PRINT_EVENT_INFO* print_event_info,
                             bool is_more __attribute__((unused)))
1054
{
1055
  char llbuff[22];
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  my_off_t hexdump_from= print_event_info->hexdump_from;
1057
  DBUG_ENTER("Log_event::print_header");
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1059
  my_b_printf(file, "#");
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  print_timestamp(file);
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  my_b_printf(file, " server id %d  end_log_pos %s ", server_id,
              llstr(log_pos,llbuff));
1063

1064
  /* mysqlbinlog --hexdump */
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  if (print_event_info->hexdump_from)
1066
  {
1067
    my_b_printf(file, "\n");
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    uchar *ptr= (uchar*)temp_buf;
    my_off_t size=
      uint4korr(ptr + EVENT_LEN_OFFSET) - LOG_EVENT_MINIMAL_HEADER_LEN;
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    my_off_t i;

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

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    /* Pretty-print event common header if header is exactly 19 bytes */
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    if (print_event_info->common_header_len == LOG_EVENT_MINIMAL_HEADER_LEN)
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    {
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
      char emit_buf[256];               // Enough for storing one line
      my_b_printf(file, "# Position  Timestamp   Type   Master ID        "
                  "Size      Master Pos    Flags \n");
      int const bytes_written=
        my_snprintf(emit_buf, sizeof(emit_buf),
                    "# %8.8lx %02x %02x %02x %02x   %02x   "
                    "%02x %02x %02x %02x   %02x %02x %02x %02x   "
                    "%02x %02x %02x %02x   %02x %02x\n",
                    (unsigned long) hexdump_from,
                    ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5], ptr[6],
                    ptr[7], ptr[8], ptr[9], ptr[10], ptr[11], ptr[12], ptr[13],
                    ptr[14], ptr[15], ptr[16], ptr[17], ptr[18]);
      DBUG_ASSERT(bytes_written >= 0);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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      ptr += LOG_EVENT_MINIMAL_HEADER_LEN;
      hexdump_from += LOG_EVENT_MINIMAL_HEADER_LEN;
    }
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    /* Rest of event (without common header) */
    for (i= 0, c= char_string, h=hex_string;
	 i < size;
	 i++, ptr++)
1103
    {
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      my_snprintf(h, 4, "%02x ", *ptr);
      h += 3;
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      *c++= my_isalnum(&my_charset_bin, *ptr) ? *ptr : '.';
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      if (i % 16 == 15)
      {
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        /*
          my_b_printf() does not support full printf() formats, so we
          have to do it this way.

          TODO: Rewrite my_b_printf() to support full printf() syntax.
         */
        char emit_buf[256];
        int const bytes_written=
          my_snprintf(emit_buf, sizeof(emit_buf),
                      "# %8.8lx %-48.48s |%16s|\n",
                      (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                      hex_string, char_string);
        DBUG_ASSERT(bytes_written >= 0);
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        DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
	my_b_write(file, (uchar*) emit_buf, bytes_written);
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	hex_string[0]= 0;
	char_string[0]= 0;
	c= char_string;
	h= hex_string;
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      }
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      else if (i % 8 == 7) *h++ = ' ';
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    }
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    *c= '\0';
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    /* Non-full last line */
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    if (hex_string[0])
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    {
      char emit_buf[256];
      int const bytes_written=
        my_snprintf(emit_buf, sizeof(emit_buf),
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                    "# %8.8lx %-48.48s |%s|\n",
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                    (unsigned long) (hexdump_from + (i & 0xfffffff0)),
                    hex_string, char_string);
      DBUG_ASSERT(bytes_written >= 0);
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      DBUG_ASSERT(static_cast<size_t>(bytes_written) < sizeof(emit_buf));
      my_b_write(file, (uchar*) emit_buf, bytes_written);
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    }
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    /*
      need a # to prefix the rest of printouts for example those of
      Rows_log_event::print_helper().
    */
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    my_b_write(file, reinterpret_cast<const uchar*>("# "), 2);
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  }
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  DBUG_VOID_RETURN;
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}

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

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  size_t const tmp_str_sz= base64_needed_encoded_length((int) size);
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  char *const tmp_str= (char *) my_malloc(tmp_str_sz, MYF(MY_WME));
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  if (!tmp_str) {
    fprintf(stderr, "\nError: Out of memory. "
            "Could not print correct binlog event.\n");
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    DBUG_VOID_RETURN;
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  }
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  if (base64_encode(ptr, (size_t) size, tmp_str))
  {
    DBUG_ASSERT(0);
  }
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  if (my_b_tell(file) == 0)
    my_b_printf(file, "\nBINLOG '\n");

  my_b_printf(file, "%s\n", tmp_str);

  if (!more)
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    my_b_printf(file, "'%s\n", print_event_info->delimiter);
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  my_free(tmp_str, MYF(0));
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  DBUG_VOID_RETURN;
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}


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

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


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

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

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

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

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

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

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

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/*
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  SYNOPSIS
    Query_log_event::Query_log_event()
      thd               - thread handle
      query_arg         - array of char representing the query
      query_length      - size of the  `query_arg' array
      using_trans       - there is a modified transactional table
      suppress_use      - suppress the generation of 'USE' statements
      killed_status_arg - an optional with default to THD::KILLED_NO_VALUE
                          if the value is different from the default, the arg
                          is set to the current thd->killed value.
                          A caller might need to masquerade thd->killed with
                          THD::NOT_KILLED.
  DESCRIPTION
  Creates an event for binlogging
  The value for local `killed_status' can be supplied by caller.
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*/
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Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
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				 ulong query_length, bool using_trans,
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				 bool suppress_use, THD::killed_state killed_status_arg)
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  :Log_event(thd_arg,
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	     ((thd_arg->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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   thread_id(thd_arg->thread_id),
   /* save the original thread id; we already know the server id */
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   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
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   auto_increment_offset(thd_arg->variables.auto_increment_offset),
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   lc_time_names_number(thd_arg->variables.lc_time_names->number),
   charset_database_number(0)
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{
  time_t end_time;
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  if (killed_status_arg == THD::KILLED_NO_VALUE)
    killed_status_arg= thd_arg->killed;
  error_code=
    (killed_status_arg == THD::NOT_KILLED) ? thd_arg->net.last_errno :
    ((thd_arg->system_thread & SYSTEM_THREAD_DELAYED_INSERT) ? 0 :
     thd->killed_errno());
  
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  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 (thd_arg->variables.collation_database != thd_arg->db_charset)
    charset_database_number= thd_arg->variables.collation_database->number;
  
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  /*
    If we don't use flags2 for anything else than options contained in
    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",
                     (ulong) flags2, sql_mode));
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}
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#endif /* MYSQL_CLIENT */
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/* 2 utility functions for the next method */

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/* 
  Get the pointer for a string (src) that contains the length in
  the first byte. Set the output string (dst) to the string value
  and place the length of the string in the byte after the string.
*/
static void get_str_len_and_pointer(const Log_event::Byte **src, 
                                    const char **dst, 
                                    uint *len)
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{
  if ((*len= **src))
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    *dst= (char *)*src + 1;                          // Will be copied later
  (*src)+= *len + 1;
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}

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

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/*
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  Query_log_event::Query_log_event()
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  This is used by the SQL slave thread to prepare the event before execution.
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*/
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Query_log_event::Query_log_event(const char* buf, uint event_len,
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                                 const Format_description_log_event
                                 *description_event,
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                                 Log_event_type event_type)
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  :Log_event(buf, description_event), data_buf(0), query(NullS),
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   db(NullS), catalog_len(0), status_vars_len(0),
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   flags2_inited(0), sql_mode_inited(0), charset_inited(0),
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   auto_increment_increment(1), auto_increment_offset(1),
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   time_zone_len(0), lc_time_names_number(0), charset_database_number(0)
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{
  ulong data_len;
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  uint32 tmp;
  uint8 common_header_len, post_header_len;
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  Log_event::Byte *start;
  const Log_event::Byte *end;
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  bool catalog_nz= 1;
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  DBUG_ENTER("Query_log_event::Query_log_event(char*,...)");

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

  /*
    5.0 format starts here.
    Depending on the format, we may or not have affected/warnings etc
    The remnent post-header to be parsed has length:
  */
  tmp= post_header_len - QUERY_HEADER_MINIMAL_LEN; 
  if (tmp)
1623
  {
1624 1625 1626 1627 1628
    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;
1629
  }
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  /*
    We have parsed everything we know in the post header for QUERY_EVENT,
    the rest of post header is either comes from older version MySQL or
    dedicated to derived events (e.g. Execute_load_query...)
  */

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  /* variable-part: the status vars; only in MySQL 5.0  */
  
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  start= (Log_event::Byte*) (buf+post_header_len);
  end= (const Log_event::Byte*) (start+status_vars_len);
  for (const Log_event::Byte* pos= start; pos < end;)
1641
  {
1642 1643 1644 1645
    switch (*pos++) {
    case Q_FLAGS2_CODE:
      flags2_inited= 1;
      flags2= uint4korr(pos);
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      DBUG_PRINT("info",("In Query_log_event, read flags2: %lu", (ulong) flags2));
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660
      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;
    }
1661
    case Q_CATALOG_NZ_CODE:
1662
      get_str_len_and_pointer(&pos, &catalog, &catalog_len);
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      break;
    case Q_AUTO_INCREMENT:
      auto_increment_increment= uint2korr(pos);
      auto_increment_offset=    uint2korr(pos+2);
      pos+= 4;
      break;
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    case Q_CHARSET_CODE:
    {
      charset_inited= 1;
      memcpy(charset, pos, 6);
      pos+= 6;
      break;
    }
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    case Q_TIME_ZONE_CODE:
    {
1678
      get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len);
1679 1680
      break;
    }
1681 1682 1683 1684 1685 1686
    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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    case Q_LC_TIME_NAMES_CODE:
      lc_time_names_number= uint2korr(pos);
      pos+= 2;
      break;
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    case Q_CHARSET_DATABASE_CODE:
      charset_database_number= uint2korr(pos);
      pos+= 2;
      break;
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    default:
      /* That's why you must write status vars in growing order of code */
      DBUG_PRINT("info",("Query_log_event has unknown status vars (first has\
 code: %u), skipping the rest of them", (uint) *(pos-1)));
1699
      pos= (const uchar*) end;                         // Break loop
1700
    }
1701
  }
1702
  
1703
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
1704 1705 1706 1707 1708 1709
  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
                                              time_zone_len + 1 +
                                              data_len + 1 +
                                              QUERY_CACHE_FLAGS_SIZE +
                                              db_len + 1,
                                              MYF(MY_WME))))
1710
#else
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  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
                                             time_zone_len + 1 +
                                             data_len + 1,
                                             MYF(MY_WME))))
1715
#endif
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      DBUG_VOID_RETURN;
1717
  if (catalog_len)                                  // If catalog is given
1718
  {
1719
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1720
      copy_str_and_move(&catalog, &start, catalog_len);
1721 1722 1723
    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
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      catalog= (const char *)start;
1725 1726
      start+= catalog_len+1;
    }
1727
  }
1728
  if (time_zone_len)
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    copy_str_and_move(&time_zone_str, &start, time_zone_len);
1730

1731
  /* A 2nd variable part; this is common to all versions */ 
1732
  memcpy((char*) start, end, data_len);          // Copy db and query
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  start[data_len]= '\0';              // End query with \0 (For safetly)
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  db= (char *)start;
  query= (char *)(start + db_len + 1);
1736 1737
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

1740

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1741
/*
1742
  Query_log_event::print()
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*/
1744

1745
#ifdef MYSQL_CLIENT
1746
void Query_log_event::print_query_header(IO_CACHE* file,
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					 PRINT_EVENT_INFO* print_event_info)
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{
1749
  // TODO: print the catalog ??
1750
  char buff[40],*end;				// Enough for SET TIMESTAMP
1751 1752 1753
  bool different_db= 1;
  uint32 tmp;

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  if (!print_event_info->short_form)
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  {
1756 1757 1758 1759
    print_header(file, print_event_info, FALSE);
    my_b_printf(file, "\t%s\tthread_id=%lu\texec_time=%lu\terror_code=%d\n",
                get_type_str(), (ulong) thread_id, (ulong) exec_time,
                error_code);
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  }

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  if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db)
1763
  {
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    if (different_db= memcmp(print_event_info->db, db, db_len + 1))
      memcpy(print_event_info->db, db, db_len + 1);
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    if (db[0] && different_db) 
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      my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter);
1768
  }
1769

1770
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
1771
  end= strmov(end, print_event_info->delimiter);
1772
  *end++='\n';
1773
  my_b_write(file, (uchar*) buff, (uint) (end-buff));
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  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(file,"SET @@session.pseudo_thread_id=%lu%s\n",
                (ulong)thread_id, print_event_info->delimiter);
1777

1778
  /*
1779 1780 1781
    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).
1782 1783 1784 1785
  */
  if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
  {
    /* tmp is a bitmask of bits which have changed. */
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    if (likely(print_event_info->flags2_inited)) 
1787
      /* All bits which have changed */
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      tmp= (print_event_info->flags2) ^ flags2;
1789 1790
    else /* that's the first Query event we read */
    {
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      print_event_info->flags2_inited= 1;
1792 1793 1794 1795 1796 1797
      tmp= ~((uint32)0); /* all bits have changed */
    }

    if (unlikely(tmp)) /* some bits have changed */
    {
      bool need_comma= 0;
1798
      my_b_printf(file, "SET ");
1799 1800 1801 1802 1803 1804
      print_set_option(file, tmp, OPTION_NO_FOREIGN_KEY_CHECKS, ~flags2,
                   "@@session.foreign_key_checks", &need_comma);
      print_set_option(file, tmp, OPTION_AUTO_IS_NULL, flags2,
                   "@@session.sql_auto_is_null", &need_comma);
      print_set_option(file, tmp, OPTION_RELAXED_UNIQUE_CHECKS, ~flags2,
                   "@@session.unique_checks", &need_comma);
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      my_b_printf(file,"%s\n", print_event_info->delimiter);
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      print_event_info->flags2= flags2;
1807 1808 1809 1810
    }
  }

  /*
1811 1812 1813 1814 1815 1816 1817 1818 1819 1820
    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.
1821 1822 1823 1824
  */

  if (likely(sql_mode_inited))
  {
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    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
1826
    {
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      print_event_info->sql_mode_inited= 1;
1828
      /* force a difference to force write */
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      print_event_info->sql_mode= ~sql_mode;
1830
    }
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    if (unlikely(print_event_info->sql_mode != sql_mode))
1832
    {
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      my_b_printf(file,"SET @@session.sql_mode=%lu%s\n",
                  (ulong)sql_mode, print_event_info->delimiter);
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      print_event_info->sql_mode= sql_mode;
1836 1837
    }
  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
1840
  {
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    my_b_printf(file,"SET @@session.auto_increment_increment=%lu, @@session.auto_increment_offset=%lu%s\n",
                auto_increment_increment,auto_increment_offset,
                print_event_info->delimiter);
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    print_event_info->auto_increment_increment= auto_increment_increment;
    print_event_info->auto_increment_offset=    auto_increment_offset;
1846 1847
  }

1848 1849
  /* TODO: print the catalog when we feature SET CATALOG */

1850 1851
  if (likely(charset_inited))
  {
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1852
    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
1853
    {
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      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
1856
    }
1857
    if (unlikely(bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6)))
1858
    {
1859 1860 1861
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
1862
        /* for mysql client */
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        my_b_printf(file, "/*!\\C %s */%s\n",
                    cs_info->csname, print_event_info->delimiter);
1865
      }
1866 1867 1868 1869
      my_b_printf(file,"SET "
                  "@@session.character_set_client=%d,"
                  "@@session.collation_connection=%d,"
                  "@@session.collation_server=%d"
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                  "%s\n",
1871 1872
                  uint2korr(charset),
                  uint2korr(charset+2),
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                  uint2korr(charset+4),
                  print_event_info->delimiter);
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      memcpy(print_event_info->charset, charset, 6);
1876 1877
    }
  }
1878 1879
  if (time_zone_len)
  {
1880 1881
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
1882
    {
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      my_b_printf(file,"SET @@session.time_zone='%s'%s\n",
                  time_zone_str, print_event_info->delimiter);
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      memcpy(print_event_info->time_zone_str, time_zone_str, time_zone_len+1);
1886 1887
    }
  }
1888 1889
  if (lc_time_names_number != print_event_info->lc_time_names_number)
  {
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    my_b_printf(file, "SET @@session.lc_time_names=%d%s\n",
                lc_time_names_number, print_event_info->delimiter);
1892 1893
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
1894 1895 1896
  if (charset_database_number != print_event_info->charset_database_number)
  {
    if (charset_database_number)
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      my_b_printf(file, "SET @@session.collation_database=%d%s\n",
                  charset_database_number, print_event_info->delimiter);
1899
    else
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1900 1901
      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
1902 1903
    print_event_info->charset_database_number= charset_database_number;
  }
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}

1906

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void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
1909 1910 1911
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
1912
  my_b_write(&cache, (uchar*) query, q_len);
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  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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1914
}
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1915
#endif /* MYSQL_CLIENT */
1916

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1917

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/*
1919
  Query_log_event::do_apply_event()
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1920
*/
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1921

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1922
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1923

1924
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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1925
{
1926
  return do_apply_event(rli, query, q_len);
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}


1930
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli,
1931
                                      const char *query_arg, uint32 q_len_arg)
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{
1933
  LEX_STRING new_db;
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1934
  int expected_error,actual_error= 0;
1935
  /*
1936 1937 1938
    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
1939
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
1940
    you.
1941
  */
1942
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
1943 1944 1945
  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' */
1946 1947
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1948

1949
  /*
1950 1951 1952 1953 1954 1955 1956 1957
    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.
1958
  */
1959
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
1960 1961
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

1962 1963
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
  const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
1964

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1965 1966 1967 1968 1969 1970 1971
  /*
    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
1972
            ::do_apply_event(), then the companion SET also have so
1973
            we don't need to reset_one_shot_variables().
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1974
  */
1975
  if (rpl_filter->db_ok(thd->db))
1976 1977
  {
    thd->set_time((time_t)when);
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1978 1979
    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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    VOID(pthread_mutex_lock(&LOCK_thread_count));
1981
    thd->query_id = next_query_id();
1982
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
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    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
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    DBUG_PRINT("query",("%s",thd->query));
1985

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    if (ignored_error_code((expected_error= error_code)) ||
1987
	!check_expected_error(thd,rli,expected_error))
1988 1989 1990
    {
      if (flags2_inited)
        /*
1991 1992
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
1993
        */
1994
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
1995 1996
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
1997 1998
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
1999 2000 2001 2002 2003
      */
      /*
        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
2004 2005 2006
        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).
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
      */
      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))))
          {
            /*
2025 2026 2027 2028
              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).
2029
            */
2030
            set_slave_thread_default_charset(thd, rli);
2031 2032 2033 2034 2035
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
2036 2037 2038
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
2039
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
2040 2041 2042 2043 2044 2045
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058
      if (lc_time_names_number)
      {
        if (!(thd->variables.lc_time_names=
              my_locale_by_number(lc_time_names_number)))
        {
          my_printf_error(ER_UNKNOWN_ERROR,
                      "Unknown locale: '%d'", MYF(0), lc_time_names_number);
          thd->variables.lc_time_names= &my_locale_en_US;
          goto compare_errors;
        }
      }
      else
        thd->variables.lc_time_names= &my_locale_en_US;
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
      if (charset_database_number)
      {
        CHARSET_INFO *cs;
        if (!(cs= get_charset(charset_database_number, MYF(0))))
        {
          char buf[20];
          int10_to_str((int) charset_database_number, buf, -10);
          my_error(ER_UNKNOWN_COLLATION, MYF(0), buf);
          goto compare_errors;
        }
        thd->variables.collation_database= cs;
      }
      else
        thd->variables.collation_database= thd->db_charset;
      
2074
      /* Execute the query (note that we bypass dispatch_command()) */
2075 2076
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
2077 2078

    }
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    else
    {
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      /*
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        The query got a really bad error on the master (thread killed etc),
        which could be inconsistent. Parse it to test the table names: if the
        replicate-*-do|ignore-table rules say "this query must be ignored" then
        we exit gracefully; otherwise we warn about the bad error and tell DBA
        to check/fix it.
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      */
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      if (mysql_test_parse_for_slave(thd, thd->query, thd->query_length))
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        clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli)); /* Can ignore query */
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      else
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      {
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        rli->report(ERROR_LEVEL, expected_error, 
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                          "\
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Query partially completed on the master (error on master: %d) \
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and was aborted. There is a chance that your master is inconsistent at this \
point. If you are sure that your master is ok, run this query manually on the \
slave and then restart the slave with SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; \
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START SLAVE; . Query: '%s'", expected_error, thd->query);
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        thd->query_error= 1;
      }
      goto end;
    }
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    /* If the query was not ignored, it is printed to the general log */
    if (thd->net.last_errno != ER_SLAVE_IGNORED_TABLE)
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      general_log_print(thd, COM_QUERY, "%s", thd->query);
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compare_errors:
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     /*
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      If we expected a non-zero error code, and we don't get the same error
      code, and none of them should be ignored.
    */
    DBUG_PRINT("info",("expected_error: %d  last_errno: %d",
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 		       expected_error, thd->net.last_errno));
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    if ((expected_error != (actual_error= thd->net.last_errno)) &&
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 	expected_error &&
 	!ignored_error_code(actual_error) &&
 	!ignored_error_code(expected_error))
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    {
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      rli->report(ERROR_LEVEL, 0,
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                      "\
Query caused different errors on master and slave.     \
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Error on master: '%s' (%d), Error on slave: '%s' (%d). \
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Default database: '%s'. Query: '%s'",
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                      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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      thd->query_error= 1;
    }
    /*
      If we get the same error code as expected, or they should be ignored. 
    */
    else if (expected_error == actual_error ||
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 	     ignored_error_code(actual_error))
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    {
      DBUG_PRINT("info",("error ignored"));
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      clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
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    }
    /*
      Other cases: mostly we expected no error and get one.
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    */
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    else if (thd->query_error || thd->is_fatal_error)
    {
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      rli->report(ERROR_LEVEL, actual_error,
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                      "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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      thd->query_error= 1;
    }
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    /*
      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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  return thd->query_error;
}

int Query_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
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  /*
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    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.
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  */
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  if (thd->one_shot_set)
  {
    rli->inc_event_relay_log_pos();
    return 0;
  }
  else
    return Log_event::do_update_pos(rli);
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}
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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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**************************************************************************/
2248

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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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  DBUG_ENTER("Start_log_event_v3::print");

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

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  if (!print_event_info->short_form)
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  {
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    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tStart: binlog v %d, server v %s created ",
                binlog_version, server_version);
    print_timestamp(&cache);
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    if (created)
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      my_b_printf(&cache," at startup");
    my_b_printf(&cache, "\n");
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    if (flags & LOG_EVENT_BINLOG_IN_USE_F)
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      my_b_printf(&cache, "# Warning: this binlog was not closed properly. "
                  "Most probably mysqld crashed writing it.\n");
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  }
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  if (!artificial_event && created)
  {
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#ifdef WHEN_WE_HAVE_THE_RESET_CONNECTION_SQL_COMMAND
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    /*
      This is for mysqlbinlog: like in replication, we want to delete the stale
      tmp files left by an unclean shutdown of mysqld (temporary tables)
      and rollback unfinished transaction.
      Probably this can be done with RESET CONNECTION (syntax to be defined).
    */
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    my_b_printf(&cache,"RESET CONNECTION%s\n", print_event_info->delimiter);
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#else
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    my_b_printf(&cache,"ROLLBACK%s\n", print_event_info->delimiter);
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#endif
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  }
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  DBUG_VOID_RETURN;
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}
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#endif /* MYSQL_CLIENT */
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/*
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  Start_log_event_v3::Start_log_event_v3()
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*/
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Start_log_event_v3::Start_log_event_v3(const char* buf,
                                       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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  // prevent overrun if log is corrupted on disk
  server_version[ST_SERVER_VER_LEN-1]= 0;
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  created= uint4korr(buf+ST_CREATED_OFFSET);
  /* We use log_pos to mark if this was an artificial event or not */
  artificial_event= (log_pos == 0);
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}

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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)) ||
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          my_b_safe_write(file, (uchar*) buff, sizeof(buff)));
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}
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#endif
2352

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/*
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  Start_log_event_v3::do_apply_event()
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  The master started

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

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

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

/*
  Format_description_log_event 1st ctor.

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

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

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

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


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

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

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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().
  */
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  uchar buff[FORMAT_DESCRIPTION_HEADER_LEN];
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  int2store(buff + ST_BINLOG_VER_OFFSET,binlog_version);
  memcpy((char*) buff + ST_SERVER_VER_OFFSET,server_version,ST_SERVER_VER_LEN);
  int4store(buff + ST_CREATED_OFFSET,created);
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  buff[ST_COMMON_HEADER_LEN_OFFSET]= LOG_EVENT_HEADER_LEN;
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  memcpy((char*) buff+ST_COMMON_HEADER_LEN_OFFSET+1, (uchar*) post_header_len,
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         LOG_EVENT_TYPES);
  return (write_header(file, sizeof(buff)) ||
          my_b_safe_write(file, buff, sizeof(buff)));
}
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#endif
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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int Format_description_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
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  DBUG_ENTER("Format_description_log_event::do_apply_event");
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#ifdef USING_TRANSACTIONS
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  /*
    As a transaction NEVER spans on 2 or more binlogs:
    if we have an active transaction at this point, the master died
    while writing the transaction to the binary log, i.e. while
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    flushing the binlog cache to the binlog. XA guarantees that master has
    rolled back. So we roll back.
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    Note: this event could be sent by the master to inform us of the
    format of its binlog; in other words maybe it is not at its
    original place when it comes to us; we'll know this by checking
    log_pos ("artificial" events have log_pos == 0).
  */
  if (!artificial_event && created && thd->transaction.all.nht)
  {
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    /* This is not an error (XA is safe), just an information */
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    rli->report(INFORMATION_LEVEL, 0,
                "Rolling back unfinished transaction (no COMMIT "
                "or ROLLBACK in relay log). A probable cause is that "
                "the master died while writing the transaction to "
                "its binary log, thus rolled back too."); 
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    const_cast<RELAY_LOG_INFO*>(rli)->cleanup_context(thd, 1);
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  }
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#endif
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  /*
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    If this event comes from ourselves, there is no cleaning task to
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    perform, we don't call Start_log_event_v3::do_apply_event()
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    (this was just to update the log's description event).
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  */
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  if (server_id != (uint32) ::server_id)
  {
    /*
      If the event was not requested by the slave i.e. the master sent
      it while the slave asked for a position >4, the event will make
      rli->group_master_log_pos advance. Say that the slave asked for
      position 1000, and the Format_desc event's end is 96. Then in
      the beginning of replication rli->group_master_log_pos will be
      0, then 96, then jump to first really asked event (which is
      >96). So this is ok.
    */
    DBUG_RETURN(Start_log_event_v3::do_apply_event(rli));
  }
  DBUG_RETURN(0);
}

int Format_description_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
  /* save the information describing this binlog */
  delete rli->relay_log.description_event_for_exec;
  rli->relay_log.description_event_for_exec= this;

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  if (server_id == (uint32) ::server_id)
  {
    /*
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      We only increase the relay log position if we are skipping
      events and do not touch any group_* variables, nor flush the
      relay log info.  If there is a crash, we will have to re-skip
      the events again, but that is a minor issue.

      If we do not skip stepping the group log position (and the
      server id was changed when restarting the server), it might well
      be that we start executing at a position that is invalid, e.g.,
      at a Rows_log_event or a Query_log_event preceeded by a
      Intvar_log_event instead of starting at a Table_map_log_event or
      the Intvar_log_event respectively.
     */
    rli->inc_event_relay_log_pos();
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    return 0;
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  }
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  else
  {
    return Log_event::do_update_pos(rli);
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  }
}

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Log_event::enum_skip_reason
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Format_description_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
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{
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  return Log_event::EVENT_SKIP_NOT;
2693
}
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#endif

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/**
   Splits the event's 'server_version' string into three numeric pieces stored
   into 'server_version_split':
   X.Y.Zabc (X,Y,Z numbers, a not a digit) -> {X,Y,Z}
   X.Yabc -> {X,Y,0}
   Xabc -> {X,0,0}
   'server_version_split' is then used for lookups to find if the server which
   created this event has some known bug.
*/
void Format_description_log_event::calc_server_version_split()
{
  char *p= server_version, *r;
  ulong number;
  for (uint i= 0; i<=2; i++)
  {
    number= strtoul(p, &r, 10);
    server_version_split[i]= (uchar)number;
    DBUG_ASSERT(number < 256); // fit in uchar
    p= r;
    DBUG_ASSERT(!((i == 0) && (*r != '.'))); // should be true in practice
    if (*r == '.')
      p++; // skip the dot
  }
  DBUG_PRINT("info",("Format_description_log_event::server_version_split:"
                     " '%s' %d %d %d", server_version,
                     server_version_split[0],
                     server_version_split[1], server_version_split[2]));
}


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

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

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  if (check_fname_outside_temp_buf())
    pos= strmov(pos, "LOCAL ");
  pos= strmov(pos, "INFILE '");
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  memcpy(pos, fname, fname_len);
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  pos= strmov(pos+fname_len, "' ");
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  if (sql_ex.opt_flags & REPLACE_FLAG)
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    pos= strmov(pos, " REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
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    pos= strmov(pos, " IGNORE ");

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  pos= strmov(pos ,"INTO");

  if (fn_end)
    *fn_end= pos;

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

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  /* We have to create all optinal fields as the default is not empty */
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  pos= strmov(pos, "` FIELDS TERMINATED BY ");
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  pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len);
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
    pos= strmov(pos, " OPTIONALLY ");
  pos= strmov(pos, " ENCLOSED BY ");
  pos= pretty_print_str(pos, sql_ex.enclosed, sql_ex.enclosed_len);
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  pos= strmov(pos, " ESCAPED BY ");
  pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
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  pos= strmov(pos, " LINES TERMINATED BY ");
  pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
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  if (sql_ex.line_start_len)
  {
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    pos= strmov(pos, " STARTING BY ");
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    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
2822
  }
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  if ((long) skip_lines > 0)
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  {
    pos= strmov(pos, " IGNORE ");
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    pos= longlong10_to_str((longlong) skip_lines, pos, 10);
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    pos= strmov(pos," LINES ");    
  }
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  if (num_fields)
  {
    uint i;
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    const char *field= fields;
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    pos= strmov(pos, " (");
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    for (i = 0; i < num_fields; i++)
    {
      if (i)
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      {
        *pos++= ' ';
        *pos++= ',';
      }
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      memcpy(pos, field, field_lens[i]);
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      pos+=   field_lens[i];
      field+= field_lens[i]  + 1;
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    }
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    *pos++= ')';
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  }
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  *end= pos;
}


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

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

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/*
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  Load_log_event::write_data_header()
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*/
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bool Load_log_event::write_data_header(IO_CACHE* file)
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{
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  char buf[LOAD_HEADER_LEN];
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  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
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  int4store(buf + L_EXEC_TIME_OFFSET, exec_time);
  int4store(buf + L_SKIP_LINES_OFFSET, skip_lines);
  buf[L_TBL_LEN_OFFSET] = (char)table_name_len;
  buf[L_DB_LEN_OFFSET] = (char)db_len;
  int4store(buf + L_NUM_FIELDS_OFFSET, num_fields);
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  return my_b_safe_write(file, (uchar*)buf, LOAD_HEADER_LEN) != 0;
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}
2884

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/*
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  Load_log_event::write_data_body()
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*/
2889

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bool Load_log_event::write_data_body(IO_CACHE* file)
2891
{
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  if (sql_ex.write_data(file))
    return 1;
  if (num_fields && fields && field_lens)
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  {
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    if (my_b_safe_write(file, (uchar*)field_lens, num_fields) ||
	my_b_safe_write(file, (uchar*)fields, field_block_len))
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      return 1;
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  }
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  return (my_b_safe_write(file, (uchar*)table_name, table_name_len + 1) ||
	  my_b_safe_write(file, (uchar*)db, db_len + 1) ||
	  my_b_safe_write(file, (uchar*)fname, fname_len));
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}

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/*
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  Load_log_event::Load_log_event()
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*/
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Load_log_event::Load_log_event(THD *thd_arg, sql_exchange *ex,
			       const char *db_arg, const char *table_name_arg,
			       List<Item> &fields_arg,
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			       enum enum_duplicates handle_dup,
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			       bool ignore, bool using_trans)
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  :Log_event(thd_arg, !thd_arg->tmp_table_used ?
	     0 : LOG_EVENT_THREAD_SPECIFIC_F, using_trans),
   thread_id(thd_arg->thread_id),
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   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
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   table_name(table_name_arg ? table_name_arg : ""),
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   db(db_arg), fname(ex->file_name), local_fname(FALSE)
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{
  time_t end_time;
  time(&end_time);
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  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;
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  if (ex->dumpfile)
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    sql_ex.opt_flags|= DUMPFILE_FLAG;
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  if (ex->opt_enclosed)
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    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;
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  sql_ex.empty_flags= 0;
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  switch (handle_dup) {
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  case DUP_REPLACE:
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    sql_ex.opt_flags|= REPLACE_FLAG;
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    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
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  }
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  if (ignore)
    sql_ex.opt_flags|= IGNORE_FLAG;
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  if (!ex->field_term->length())
    sql_ex.empty_flags |= FIELD_TERM_EMPTY;
  if (!ex->enclosed->length())
    sql_ex.empty_flags |= ENCLOSED_EMPTY;
  if (!ex->line_term->length())
    sql_ex.empty_flags |= LINE_TERM_EMPTY;
  if (!ex->line_start->length())
    sql_ex.empty_flags |= LINE_START_EMPTY;
  if (!ex->escaped->length())
    sql_ex.empty_flags |= ESCAPED_EMPTY;
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  skip_lines = ex->skip_lines;
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  List_iterator<Item> li(fields_arg);
  field_lens_buf.length(0);
  fields_buf.length(0);
  Item* item;
  while ((item = li++))
  {
    num_fields++;
    uchar len = (uchar) strlen(item->name);
    field_block_len += len + 1;
    fields_buf.append(item->name, len + 1);
    field_lens_buf.append((char*)&len, 1);
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  }

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  field_lens = (const uchar*)field_lens_buf.ptr();
  fields = fields_buf.ptr();
}
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#endif /* !MYSQL_CLIENT */
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/*
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  Load_log_event::Load_log_event()
2996

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

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Load_log_event::Load_log_event(const char *buf, uint event_len,
                               const Format_description_log_event *description_event)
  :Log_event(buf, description_event), num_fields(0), fields(0),
   field_lens(0),field_block_len(0),
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   table_name(0), db(0), fname(0), local_fname(FALSE)
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{
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  DBUG_ENTER("Load_log_event");
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  /*
    I (Guilhem) manually tested replication of LOAD DATA INFILE for 3.23->5.0,
    4.0->5.0 and 5.0->5.0 and it works.
  */
  if (event_len)
    copy_log_event(buf, event_len,
                   ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
                    LOAD_HEADER_LEN + 
                    description_event->common_header_len :
                    LOAD_HEADER_LEN + LOG_EVENT_HEADER_LEN),
                   description_event);
  /* otherwise it's a derived class, will call copy_log_event() itself */
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  DBUG_VOID_RETURN;
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}

3024

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/*
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  Load_log_event::copy_log_event()
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*/
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int Load_log_event::copy_log_event(const char *buf, ulong event_len,
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                                   int body_offset,
                                   const Format_description_log_event *description_event)
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{
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  DBUG_ENTER("Load_log_event::copy_log_event");
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  uint data_len;
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  char* buf_end = (char*)buf + event_len;
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  /* this is the beginning of the post-header */
  const char* data_head = buf + description_event->common_header_len;
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  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
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  exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
  skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
  table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];
  db_len = (uint)data_head[L_DB_LEN_OFFSET];
  num_fields = uint4korr(data_head + L_NUM_FIELDS_OFFSET);
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3044
	  
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3045
  if ((int) event_len < body_offset)
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    DBUG_RETURN(1);
3047 3048 3049 3050
  /*
    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.
  */
3051 3052 3053
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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3054
    DBUG_RETURN(1);
3055
  
3056
  data_len = event_len - body_offset;
3057
  if (num_fields > data_len) // simple sanity check against corruption
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3058
    DBUG_RETURN(1);
3059
  for (uint i = 0; i < num_fields; i++)
3060
    field_block_len += (uint)field_lens[i] + 1;
3061

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3062 3063 3064 3065
  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
3066 3067
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
3068

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3069
  DBUG_RETURN(0);
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3070 3071 3072
}


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/*
3074
  Load_log_event::print()
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3075
*/
3076 3077

#ifdef MYSQL_CLIENT
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void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
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  print(file, print_event_info, 0);
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}

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3083

3084
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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			   bool commented)
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3086
{
3087 3088
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  DBUG_ENTER("Load_log_event::print");
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3090
  if (!print_event_info->short_form)
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3091
  {
3092 3093 3094
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
                thread_id, exec_time);
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3095 3096
  }

3097
  bool different_db= 1;
3098
  if (db)
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3099
  {
3100 3101 3102 3103 3104 3105
    /*
      If the database is different from the one of the previous statement, we
      need to print the "use" command, and we update the last_db.
      But if commented, the "use" is going to be commented so we should not
      update the last_db.
    */
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3106
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
3107
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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  }
3110
  
3111
  if (db && db[0] && different_db)
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    my_b_printf(&cache, "%suse %s%s\n", 
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            commented ? "# " : "",
3114
            db, print_event_info->delimiter);
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3115

3116
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
3118 3119
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
3120
  my_b_printf(&cache, "%sLOAD DATA ",
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3121
              commented ? "# " : "");
3122
  if (check_fname_outside_temp_buf())
3123 3124
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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3125

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  if (sql_ex.opt_flags & REPLACE_FLAG)
3127
    my_b_printf(&cache," REPLACE ");
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  else if (sql_ex.opt_flags & IGNORE_FLAG)
3129
    my_b_printf(&cache," IGNORE ");
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3130
  
3131 3132 3133
  my_b_printf(&cache, "INTO TABLE `%s`", table_name);
  my_b_printf(&cache, " FIELDS TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.field_term, sql_ex.field_term_len);
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3134

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3135
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
3136 3137 3138
    my_b_printf(&cache," OPTIONALLY ");
  my_b_printf(&cache, " ENCLOSED BY ");
  pretty_print_str(&cache, sql_ex.enclosed, sql_ex.enclosed_len);
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3139
     
3140 3141
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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3142
     
3143 3144
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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3145

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3146

3147
  if (sql_ex.line_start)
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3148
  {
3149 3150
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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3151
  }
3152
  if ((long) skip_lines > 0)
3153
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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3154

3155 3156 3157 3158
  if (num_fields)
  {
    uint i;
    const char* field = fields;
3159
    my_b_printf(&cache, " (");
3160
    for (i = 0; i < num_fields; i++)
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3161
    {
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      if (i)
3163 3164
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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3165
	  
3166
      field += field_lens[i]  + 1;
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    }
3168
    my_b_printf(&cache, ")");
3169
  }
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3170

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3171
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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3172
  DBUG_VOID_RETURN;
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3173
}
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3174
#endif /* MYSQL_CLIENT */
3175

3176

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3177
/*
3178
  Load_log_event::set_fields()
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3179 3180 3181 3182 3183

  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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*/
3185

3186
#ifndef MYSQL_CLIENT
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3187
void Load_log_event::set_fields(const char* affected_db, 
3188 3189
				List<Item> &field_list,
                                Name_resolution_context *context)
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3190 3191
{
  uint i;
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3192
  const char* field = fields;
3193
  for (i= 0; i < num_fields; i++)
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3194
  {
3195 3196
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
3197
    field+= field_lens[i]  + 1;
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3198
  }
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}
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3200
#endif /* !MYSQL_CLIENT */
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3201 3202


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3203
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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3204 3205
/*
  Does the data loading job when executing a LOAD DATA on the slave
3206

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3207
  SYNOPSIS
3208
    Load_log_event::do_apply_event
3209 3210 3211
      net
      rli
      use_rli_only_for_errors	  - if set to 1, rli is provided to
3212
                                  Load_log_event::do_apply_event
3213 3214 3215 3216 3217 3218
                                  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
3219
                                  Execute_load_log_event::do_apply_event).
3220 3221 3222
                                  - if set to 0, rli is provided for
                                  full use, i.e. for error reports and
                                  position advancing.
3223

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3224 3225
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
3226

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3227
  RETURN VALUE
3228
    0           Success
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3229 3230
    1    	Failure
*/
3231

3232
int Load_log_event::do_apply_event(NET* net, RELAY_LOG_INFO const *rli,
3233
                                   bool use_rli_only_for_errors)
3234
{
3235 3236 3237 3238
  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);
3239
  DBUG_ASSERT(thd->query == 0);
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3240
  thd->query_length= 0;                         // Should not be needed
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3241
  thd->query_error= 0;
3242
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
3243

3244
  /* see Query_log_event::do_apply_event() and BUG#13360 */
3245
  DBUG_ASSERT(!rli->m_table_map.count());
3246
  /*
3247
    Usually lex_start() is called by mysql_parse(), but we need it here
3248 3249
    as the present method does not call mysql_parse().
  */
3250 3251 3252
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

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3253
  if (!use_rli_only_for_errors)
3254
  {
3255 3256
    /*
      Saved for InnoDB, see comment in
3257
      Query_log_event::do_apply_event()
3258
    */
3259
    const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
3260
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
3261
  }
3262 3263
 
   /*
3264 3265 3266 3267 3268 3269 3270
    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
3271
    done by testing rules in Create_file_log_event::do_apply_event()
3272 3273 3274
    and then discarding Append_block and al. Another way is do the
    filtering in the I/O thread (more efficient: no disk writes at
    all).
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3275 3276 3277 3278 3279 3280 3281 3282


    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
3283
            ::do_apply_event(), then the companion SET also have so
3284
            we don't need to reset_one_shot_variables().
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3285
  */
3286
  if (rpl_filter->db_ok(thd->db))
3287
  {
3288 3289
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
3290
    thd->query_id = next_query_id();
3291
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
3292 3293 3294 3295 3296 3297
    /*
      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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3298
    mysql_reset_errors(thd, 0);
3299 3300 3301

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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3302
    tables.db= thd->strmake(thd->db, thd->db_length);
3303
    tables.alias = tables.table_name = (char*) table_name;
3304
    tables.lock_type = TL_WRITE;
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3305
    tables.updating= 1;
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3306

3307
    // the table will be opened in mysql_load    
3308
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
3309 3310 3311 3312 3313 3314 3315 3316
    {
      // TODO: this is a bug - this needs to be moved to the I/O thread
      if (net)
        skip_load_data_infile(net);
    }
    else
    {
      char llbuff[22];
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3317
      char *end;
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3318
      enum enum_duplicates handle_dup;
3319
      bool ignore= 0;
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3320 3321
      char *load_data_query;

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3322
      /*
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3323 3324
        Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST
        and written to slave's binlog if binlogging is on.
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3325
      */
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3326
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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3327
      {
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3328 3329 3330 3331 3332
        /*
          This will set thd->fatal_error in case of OOM. So we surely will notice
          that something is wrong.
        */
        goto error;
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3333
      }
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3334 3335 3336 3337 3338 3339 3340

      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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3341
      if (sql_ex.opt_flags & REPLACE_FLAG)
3342
      {
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3343
	handle_dup= DUP_REPLACE;
3344
      }
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3345
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3346 3347 3348 3349
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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3350
      else
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3351
      {
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3352
        /*
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3353
	  When replication is running fine, if it was DUP_ERROR on the
3354
          master then we could choose IGNORE here, because if DUP_ERROR
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3355
          suceeded on master, and data is identical on the master and slave,
3356
          then there should be no uniqueness errors on slave, so IGNORE is
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3357
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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3358 3359 3360
          (because the data on the master and slave happen to be different
	  (user error or bug), we want LOAD DATA to print an error message on
	  the slave to discover the problem.
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3361 3362

          If reading from net (a 3.23 master), mysql_load() will change this
3363
          to IGNORE.
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3364 3365
        */
        handle_dup= DUP_ERROR;
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3366
      }
3367 3368 3369 3370 3371 3372 3373 3374 3375 3376
      /*
        We need to set thd->lex->sql_command and thd->lex->duplicates
        since InnoDB tests these variables to decide if this is a LOAD
        DATA ... REPLACE INTO ... statement even though mysql_parse()
        is not called.  This is not needed in 5.0 since there the LOAD
        DATA ... statement is replicated using mysql_parse(), which
        sets the thd->lex fields correctly.
      */
      thd->lex->sql_command= SQLCOM_LOAD;
      thd->lex->duplicates= handle_dup;
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3377

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3378
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3379 3380 3381 3382 3383
      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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3384 3385 3386 3387 3388
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3389 3390 3391 3392 3393 3394

      ex.opt_enclosed = (sql_ex.opt_flags & OPT_ENCLOSED_FLAG);
      if (sql_ex.empty_flags & FIELD_TERM_EMPTY)
	ex.field_term->length(0);

      ex.skip_lines = skip_lines;
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3395
      List<Item> field_list;
3396 3397
      thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
      set_fields(tables.db, field_list, &thd->lex->select_lex.context);
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3398
      thd->variables.pseudo_thread_id= thread_id;
3399 3400 3401 3402 3403 3404 3405 3406 3407
      if (net)
      {
	// mysql_load will use thd->net to read the file
	thd->net.vio = net->vio;
	/*
	  Make sure the client does not get confused about the packet sequence
	*/
	thd->net.pkt_nr = net->pkt_nr;
      }
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3408
      /*
3409
        It is safe to use tmp_list twice because we are not going to
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3410 3411
        update it inside mysql_load().
      */
3412 3413
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
3414
                     handle_dup, ignore, net != 0))
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3415
        thd->query_error= 1;
3416
      if (thd->cuted_fields)
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3417
      {
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3418
	/* log_pos is the position of the LOAD event in the master log */
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3419 3420 3421 3422 3423 3424 3425
        sql_print_warning("Slave: load data infile on table '%s' at "
                          "log position %s in log '%s' produced %ld "
                          "warning(s). Default database: '%s'",
                          (char*) table_name,
                          llstr(log_pos,llbuff), RPL_LOG_NAME, 
                          (ulong) thd->cuted_fields,
                          print_slave_db_safe(thd->db));
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3426
      }
3427 3428 3429
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3430 3431
  }
  else
3432 3433 3434 3435 3436 3437 3438 3439 3440
  {
    /*
      We will just ask the master to send us /dev/null if we do not
      want to load the data.
      TODO: this a bug - needs to be done in I/O thread
    */
    if (net)
      skip_load_data_infile(net);
  }
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3441 3442

error:
3443
  thd->net.vio = 0; 
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3444
  const char *remember_db= thd->db;
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3445
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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3446
  thd->catalog= 0;
3447
  thd->set_db(NULL, 0);                   /* will free the current database */
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3448
  thd->query= 0;
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3449
  thd->query_length= 0;
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3450
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3451
  close_thread_tables(thd);
3452 3453 3454 3455

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error",
                  thd->query_error= 0; thd->is_fatal_error= 1;);

3456 3457
  if (thd->query_error)
  {
3458
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3459 3460 3461 3462 3463 3464 3465 3466 3467
    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);       
    }
3468
    rli->report(ERROR_LEVEL, sql_errno,"\
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3469
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3470
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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3471
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3472 3473
    return 1;
  }
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3474
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3475

3476
  if (thd->is_fatal_error)
3477
  {
3478 3479 3480 3481 3482 3483 3484 3485 3486
    char buf[256];
    my_snprintf(buf, sizeof(buf),
                "Running LOAD DATA INFILE on table '%-.64s'."
                " Default database: '%-.64s'",
                (char*)table_name,
                print_slave_db_safe(remember_db));

    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), buf);
3487 3488 3489
    return 1;
  }

3490
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
3491
}
unknown's avatar
SCRUM  
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3492
#endif
3493 3494


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3495
/**************************************************************************
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3496
  Rotate_log_event methods
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3497
**************************************************************************/
3498

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3499
/*
3500
  Rotate_log_event::pack_info()
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3501
*/
3502

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3503
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3504
void Rotate_log_event::pack_info(Protocol *protocol)
3505
{
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3506
  char buf1[256], buf[22];
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3507
  String tmp(buf1, sizeof(buf1), log_cs);
3508
  tmp.length(0);
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3509
  tmp.append(new_log_ident, ident_len);
3510
  tmp.append(STRING_WITH_LEN(";pos="));
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3511 3512
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3513
}
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3514
#endif
3515

3516

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3517
/*
3518
  Rotate_log_event::print()
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3519
*/
3520 3521

#ifdef MYSQL_CLIENT
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3522
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3523
{
3524
  char buf[22];
3525 3526
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3527

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3528
  if (print_event_info->short_form)
3529
    return;
3530 3531
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
3532
  if (new_log_ident)
3533
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
3534
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
3535
}
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3536
#endif /* MYSQL_CLIENT */
3537 3538


3539

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3540
/*
3541
  Rotate_log_event::Rotate_log_event() (2 constructors)
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3542
*/
3543

3544 3545

#ifndef MYSQL_CLIENT
3546
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3547 3548 3549 3550 3551 3552 3553 3554
                                   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];
3555
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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3556 3557
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
3558 3559
#endif
  if (flags & DUP_NAME)
3560
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3561 3562 3563 3564 3565
  DBUG_VOID_RETURN;
}
#endif


3566 3567
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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3568
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3569
{
3570
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3571
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3572 3573
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3574 3575
  uint ident_offset;
  if (event_len < header_size)
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3576
    DBUG_VOID_RETURN;
3577
  buf += header_size;
3578 3579 3580 3581
  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; 
3582
  set_if_smaller(ident_len,FN_REFLEN-1);
3583
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
3584
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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3585
  DBUG_VOID_RETURN;
3586
}
3587 3588


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3589
/*
3590
  Rotate_log_event::write()
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3591
*/
3592

3593
#ifndef MYSQL_CLIENT
3594
bool Rotate_log_event::write(IO_CACHE* file)
3595
{
3596
  char buf[ROTATE_HEADER_LEN];
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3597
  int8store(buf + R_POS_OFFSET, pos);
3598
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
3599 3600
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
3601
}
3602
#endif
3603

3604

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3605
/*
3606
  Rotate_log_event::do_apply_event()
3607

3608
  Got a rotate log event from the master
3609

3610 3611 3612
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3613

3614
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3615
    in a A -> B -> A setup.
3616
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3617 3618 3619

  RETURN VALUES
    0	ok
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3620
*/
3621

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3622
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3623
int Rotate_log_event::do_update_pos(RELAY_LOG_INFO *rli)
3624
{
3625
  DBUG_ENTER("Rotate_log_event::do_update_pos");
3626 3627 3628 3629
#ifndef DBUG_OFF
  char buf[32];
#endif

3630 3631
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
3632 3633
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
3634 3635

  pthread_mutex_lock(&rli->data_lock);
3636
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3637
  /*
3638 3639 3640 3641
    If we are in a transaction or in a group: the only normal case is
    when the I/O thread was copying a big transaction, then it was
    stopped and restarted: we have this in the relay log:

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3642 3643 3644 3645 3646
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
3647 3648 3649 3650

    In that case, we don't want to touch the coordinates which
    correspond to the beginning of the transaction.  Starting from
    5.0.0, there also are some rotates from the slave itself, in the
3651
    relay log, which shall not change the group positions.
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3652
  */
3653
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
3654
      !rli->is_in_group())
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3655
  {
3656 3657 3658 3659
    DBUG_PRINT("info", ("old group_master_log_name: '%s'  "
                        "old group_master_log_pos: %lu",
                        rli->group_master_log_name,
                        (ulong) rli->group_master_log_pos));
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3660 3661
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3662
    rli->group_master_log_pos= pos;
3663 3664 3665
    strmake(rli->group_relay_log_name, rli->event_relay_log_name,
            sizeof(rli->group_relay_log_name) - 1);
    rli->notify_group_relay_log_name_update();
3666
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3667 3668
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
3669
                        rli->group_master_log_name,
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3670
                        (ulong) rli->group_master_log_pos));
3671
    /*
3672 3673
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3674 3675 3676 3677 3678
      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);
3679
    set_slave_thread_default_charset(thd, rli);
3680
    thd->variables.sql_mode= global_system_variables.sql_mode;
3681 3682
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3683
  }
3684 3685 3686
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
3687

3688
  DBUG_RETURN(0);
3689
}
3690

3691 3692

Log_event::enum_skip_reason
3693
Rotate_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3694
{
3695
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
3696 3697

  switch (reason) {
3698
  case Log_event::EVENT_SKIP_NOT:
3699
  case Log_event::EVENT_SKIP_COUNT:
3700
    return Log_event::EVENT_SKIP_NOT;
3701

3702 3703
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
3704 3705
  }
  DBUG_ASSERT(0);
3706
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
3707 3708
}

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3709
#endif
3710 3711


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3712
/**************************************************************************
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3713
	Intvar_log_event methods
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3714
**************************************************************************/
3715

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3716
/*
3717
  Intvar_log_event::pack_info()
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3718
*/
3719

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3720
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3721
void Intvar_log_event::pack_info(Protocol *protocol)
3722
{
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3723 3724
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3725
  *pos++= '=';
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3726
  pos= longlong10_to_str(val, pos, -10);
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  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3728
}
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3729
#endif
3730

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3731

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3732
/*
3733
  Intvar_log_event::Intvar_log_event()
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3734
*/
3735

3736 3737 3738
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3739
{
3740 3741 3742
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3743 3744
}

3745

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3746
/*
3747
  Intvar_log_event::get_var_type_name()
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3748
*/
3749 3750

const char* Intvar_log_event::get_var_type_name()
3751
{
3752 3753 3754 3755 3756
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3757 3758
}

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3759

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3760
/*
3761
  Intvar_log_event::write()
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3762
*/
3763

3764
#ifndef MYSQL_CLIENT
3765
bool Intvar_log_event::write(IO_CACHE* file)
3766
{
3767 3768
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
3769
  int8store(buf + I_VAL_OFFSET, val);
3770 3771
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3772
}
3773
#endif
3774

3775

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3776
/*
3777
  Intvar_log_event::print()
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3778
*/
3779 3780

#ifdef MYSQL_CLIENT
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3781
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3782
{
3783 3784 3785
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3786 3787
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3788

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3789
  if (!print_event_info->short_form)
3790
  {
3791 3792
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
3793
  }
3794

3795
  my_b_printf(&cache, "SET ");
3796 3797 3798 3799 3800 3801 3802
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
3803 3804 3805 3806
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
3807
  }
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3808 3809
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
3810
}
3811
#endif
3812

3813

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3814
/*
3815
  Intvar_log_event::do_apply_event()
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3816
*/
3817

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3818
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3819
int Intvar_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3820
{
3821 3822 3823 3824 3825 3826
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

3827 3828
  switch (type) {
  case LAST_INSERT_ID_EVENT:
3829 3830
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
3831 3832
    break;
  case INSERT_ID_EVENT:
3833
    thd->force_one_auto_inc_interval(val);
3834 3835
    break;
  }
3836 3837 3838 3839 3840
  return 0;
}

int Intvar_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3841
  rli->inc_event_relay_log_pos();
3842
  return 0;
3843
}
3844 3845 3846


Log_event::enum_skip_reason
3847
Intvar_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3848 3849
{
  /*
3850 3851 3852 3853 3854 3855
    It is a common error to set the slave skip counter to 1 instead of
    2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
3856 3857
  */
  if (rli->slave_skip_counter == 1)
3858
    return Log_event::EVENT_SKIP_IGNORE;
3859
  else
3860
    return Log_event::do_shall_skip(rli);
3861 3862
}

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3863
#endif
3864

3865

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3866
/**************************************************************************
3867
  Rand_log_event methods
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3868
**************************************************************************/
3869

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3870
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3871
void Rand_log_event::pack_info(Protocol *protocol)
3872
{
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3873 3874 3875 3876 3877
  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);
3878
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3879
}
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3880
#endif
3881 3882


3883 3884 3885
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3886
{
3887 3888 3889
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3890 3891
}

3892

3893
#ifndef MYSQL_CLIENT
3894
bool Rand_log_event::write(IO_CACHE* file)
3895
{
3896
  uchar buf[16];
3897 3898
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3899 3900
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3901
}
3902
#endif
3903

3904 3905

#ifdef MYSQL_CLIENT
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3906
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3907
{
3908 3909 3910
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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3911
  char llbuff[22],llbuff2[22];
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3912
  if (!print_event_info->short_form)
3913
  {
3914 3915
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
3916
  }
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3917 3918 3919
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
3920
}
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3921
#endif /* MYSQL_CLIENT */
3922

3923

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3924
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3925
int Rand_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3926
{
3927 3928 3929 3930 3931 3932
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

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3933 3934
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3935 3936 3937 3938 3939
  return 0;
}

int Rand_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3940
  rli->inc_event_relay_log_pos();
3941 3942
  return 0;
}
3943

3944 3945

Log_event::enum_skip_reason
3946
Rand_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3947 3948
{
  /*
3949 3950 3951 3952 3953 3954
    It is a common error to set the slave skip counter to 1 instead of
    2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
3955 3956
  */
  if (rli->slave_skip_counter == 1)
3957
    return Log_event::EVENT_SKIP_IGNORE;
3958
  else
3959
    return Log_event::do_shall_skip(rli);
3960 3961
}

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3962
#endif /* !MYSQL_CLIENT */
3963

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3964

3965 3966 3967 3968 3969 3970 3971
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3972 3973
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3974
  pos= longlong10_to_str(xid, pos, 10);
3975
  pos= strmov(pos, " */");
3976 3977 3978 3979
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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3980 3981 3982 3983 3984 3985 3986 3987
/*
  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
*/
3988 3989 3990 3991

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3992 3993 3994
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3995
  memcpy((char*) &xid, buf, sizeof(xid));
3996 3997 3998
}


3999
#ifndef MYSQL_CLIENT
4000 4001 4002
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
4003
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
4004
}
4005
#endif
4006 4007 4008


#ifdef MYSQL_CLIENT
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4009
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4010
{
4011 4012 4013
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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4014
  if (!print_event_info->short_form)
4015
  {
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4016 4017 4018
    char buf[64];
    longlong10_to_str(xid, buf, 10);

4019 4020
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
4021
  }
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4022
  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
4023 4024 4025 4026 4027
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4028
int Xid_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4029
{
4030
  /* For a slave Xid_log_event is COMMIT */
4031 4032
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
4033
  return end_trans(thd, COMMIT);
4034 4035 4036 4037
}
#endif /* !MYSQL_CLIENT */


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/**************************************************************************
4039
  User_var_log_event methods
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**************************************************************************/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
4046
  uint val_offset= 4 + name_len;
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  uint event_len= val_offset;

  if (is_null)
  {
4051 4052
    if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME))))
      return;
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    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
4062 4063 4064
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
4065 4066
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
4069 4070
      if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME))))
        return;
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      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
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    case DECIMAL_RESULT:
    {
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      if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH,
                                   MYF(MY_WME))))
        return;
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      String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin);
      my_decimal dec;
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      binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0],
                        val[1]);
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      my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str);
      event_len= str.length() + val_offset;
      break;
    } 
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    case STRING_RESULT:
4087
      /* 15 is for 'COLLATE' and other chars */
4088 4089
      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
4090
      CHARSET_INFO *cs;
4091 4092
      if (!buf)
        return;
4093 4094 4095 4096 4097 4098 4099
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
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        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
4103 4104
        event_len= p-buf;
      }
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      break;
4106
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
4113
  buf[1]= '`';
4114
  memcpy(buf+2, name, name_len);
4115 4116
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
4117
  protocol->store(buf, event_len, &my_charset_bin);
4118
  my_free(buf, MYF(0));
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}
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#endif /* !MYSQL_CLIENT */
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User_var_log_event::
User_var_log_event(const char* buf,
                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
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{
4128
  buf+= description_event->common_header_len;
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  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
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  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
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  if (is_null)
  {
    type= STRING_RESULT;
4136
    charset_number= my_charset_bin.number;
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    val_len= 0;
    val= 0;  
  }
  else
  {
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    type= (Item_result) buf[UV_VAL_IS_NULL];
    charset_number= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE);
    val_len= uint4korr(buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
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		       UV_CHARSET_NUMBER_SIZE);
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    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
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  }
}


4152
#ifndef MYSQL_CLIENT
4153
bool User_var_log_event::write(IO_CACHE* file)
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{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
4158
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
4159
  uint buf1_length;
4160
  ulong event_length;
4161

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  int4store(buf, name_len);
4163 4164 4165 4166
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
4167
    val_len= 0;                                 // Length of 'pos'
4168 4169
  }    
  else
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  {
    buf1[1]= type;
    int4store(buf1 + 2, charset_number);

    switch (type) {
    case REAL_RESULT:
      float8store(buf2, *(double*) val);
      break;
    case INT_RESULT:
      int8store(buf2, *(longlong*) val);
      break;
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    case DECIMAL_RESULT:
    {
      my_decimal *dec= (my_decimal *)val;
      dec->fix_buffer_pointer();
      buf2[0]= (char)(dec->intg + dec->frac);
      buf2[1]= (char)dec->frac;
4187
      decimal2bin((decimal_t*)val, buf2+2, buf2[0], buf2[1]);
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      val_len= decimal_bin_size(buf2[0], buf2[1]) + 2;
      break;
    }
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    case STRING_RESULT:
4192
      pos= (uchar*) val;
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      break;
4194
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return 0;
    }
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    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;
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  }
4202 4203 4204 4205 4206

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

  return (write_header(file, event_length) ||
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          my_b_safe_write(file, (uchar*) buf, sizeof(buf))   ||
	  my_b_safe_write(file, (uchar*) name, name_len)     ||
	  my_b_safe_write(file, (uchar*) buf1, buf1_length) ||
	  my_b_safe_write(file, pos, val_len));
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}
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#endif
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4214

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/*
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  User_var_log_event::print()
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*/
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#ifdef MYSQL_CLIENT
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void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
4222 4223 4224
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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  if (!print_event_info->short_form)
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  {
4227 4228
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

4231
  my_b_printf(&cache, "SET @`");
4232
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
4233
  my_b_printf(&cache, "`");
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  if (is_null)
  {
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    my_b_printf(&cache, ":=NULL%s\n", print_event_info->delimiter);
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  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
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      my_b_printf(&cache, ":=%.14g%s\n", real_val, print_event_info->delimiter);
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      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
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      my_b_printf(&cache, ":=%s%s\n", int_buf, print_event_info->delimiter);
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      break;
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    case DECIMAL_RESULT:
    {
      char str_buf[200];
      int str_len= sizeof(str_buf) - 1;
      int precision= (int)val[0];
      int scale= (int)val[1];
4258 4259
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

4263
      bin2decimal((uchar*) val+2, &dec, precision, scale);
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      decimal2string(&dec, str_buf, &str_len, 0, 0, 0);
      str_buf[str_len]= 0;
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      my_b_printf(&cache, ":=%s%s\n", str_buf, print_event_info->delimiter);
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      break;
    }
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    case STRING_RESULT:
4270
    {
4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284
      /*
        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.
      */
4285 4286 4287 4288
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
4289
        break; // no error, as we are 'void'
4290
      str_to_hex(hex_str, val, val_len);
4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301
      /*
        For proper behaviour when mysqlbinlog|mysql, we need to explicitely
        specify the variable's collation. It will however cause problems when
        people want to mysqlbinlog|mysql into another server not supporting the
        character set. But there's not much to do about this and it's unlikely.
      */
      if (!(cs= get_charset(charset_number, MYF(0))))
        /*
          Generate an unusable command (=> syntax error) is probably the best
          thing we can do here.
        */
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        my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter);
4303
      else
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        my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n",
                    cs->csname, hex_str, cs->name,
                    print_event_info->delimiter);
4307
      my_afree(hex_str);
4308
    }
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      break;
4310
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
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      return;
    }
  }
}
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#endif
4318

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/*
4321
  User_var_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4325
int User_var_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
  Item *it= 0;
4328 4329 4330
  CHARSET_INFO *charset;
  if (!(charset= get_charset(charset_number, MYF(MY_WME))))
    return 1;
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  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
4334 4335
  double real_val;
  longlong int_val;
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4337 4338 4339 4340 4341 4342
  /*
    We are now in a statement until the associated query log event has
    been processed.
   */
  const_cast<RELAY_LOG_INFO*>(rli)->set_flag(RELAY_LOG_INFO::IN_STMT);

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  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
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      it= new Item_float(real_val);
4353
      val= (char*) &real_val;		// Pointer to value in native format
4354
      val_len= 8;
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      break;
    case INT_RESULT:
4357 4358 4359
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
4360
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
4364
      Item_decimal *dec= new Item_decimal((uchar*) val+2, val[0], val[1]);
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      it= dec;
      val= (char *)dec->val_decimal(NULL);
      val_len= sizeof(my_decimal);
      break;
    }
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    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
4373
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
4380 4381 4382 4383
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
4384
  e.fix_fields(thd, 0);
4385 4386 4387 4388 4389
  /*
    A variable can just be considered as a table with
    a single record and with a single column. Thus, like
    a column value, it could always have IMPLICIT derivation.
   */
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  e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0);
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  free_root(thd->mem_root,0);
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4393 4394 4395 4396 4397
  return 0;
}

int User_var_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
4398
  rli->inc_event_relay_log_pos();
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  return 0;
}
4401

4402
Log_event::enum_skip_reason
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User_var_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  /*
    It is a common error to set the slave skip counter to 1 instead
    of 2 when recovering from an insert which used a auto increment,
    rand, or user var.  Therefore, if the slave skip counter is 1, we
    just say that this event should be skipped by ignoring it, meaning
    that we do not change the value of the slave skip counter since it
    will be decreased by the following insert event.
  */
  if (rli->slave_skip_counter == 1)
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}
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#endif /* !MYSQL_CLIENT */
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/**************************************************************************
4422
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
4426
#ifdef MYSQL_CLIENT
4427
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
4428
{
4429 4430
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
4432
    return;
4433 4434
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
4435 4436
}
#endif  
4437

4438
#ifndef MYSQL_CLIENT
4439
void Slave_log_event::pack_info(Protocol *protocol)
4440
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
4442 4443 4444 4445 4446 4447 4448
  pos= strmov(buf, "host=");
  pos= strnmov(pos, master_host, HOSTNAME_LENGTH);
  pos= strmov(pos, ",port=");
  pos= int10_to_str((long) master_port, pos, 10);
  pos= strmov(pos, ",log=");
  pos= strmov(pos, master_log);
  pos= strmov(pos, ",pos=");
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  pos= longlong10_to_str(master_pos, pos, 10);
4450
  protocol->store(buf, pos-buf, &my_charset_bin);
4451
}
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#endif /* !MYSQL_CLIENT */
4453 4454 4455 4456


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
4457
				 RELAY_LOG_INFO* rli)
4458
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
4459 4460 4461 4462
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
4463

4464 4465 4466 4467 4468
  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);
4469
  master_log_len = strlen(rli->group_master_log_name);
4470 4471 4472
  // 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))))
4473
  {
4474 4475 4476
    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;
4477
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
4478
    master_port = mi->port;
4479
    master_pos = rli->group_master_log_pos;
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    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
4481
			(ulong) master_pos));
4482
  }
4483 4484 4485 4486 4487 4488
  else
    sql_print_error("Out of memory while recording slave event");
  pthread_mutex_unlock(&rli->data_lock);
  pthread_mutex_unlock(&mi->data_lock);
  DBUG_VOID_RETURN;
}
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#endif /* !MYSQL_CLIENT */
4490 4491 4492 4493 4494 4495 4496 4497 4498


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


#ifdef MYSQL_CLIENT
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void Slave_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4500
{
4501 4502
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4503
  char llbuff[22];
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  if (print_event_info->short_form)
4505
    return;
4506 4507
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n\
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Slave: master_host: '%s'  master_port: %d  master_log: '%s'  master_pos: %s\n",
4509 4510
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
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#endif /* MYSQL_CLIENT */
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int Slave_log_event::get_data_size()
{
  return master_host_len + master_log_len + 1 + SL_MASTER_HOST_OFFSET;
}


4520
#ifndef MYSQL_CLIENT
4521
bool Slave_log_event::write(IO_CACHE* file)
4522
{
4523
  ulong event_length= get_data_size();
4524 4525 4526
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4527 4528

  return (write_header(file, event_length) ||
4529
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
4530
}
4531
#endif
4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542


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)
4543
  {
4544 4545
    master_host = 0;
    return;
4546
  }
4547 4548
  master_log_len = strlen(master_log);
}
4549

4550

4551 4552 4553
/* 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)
4554
{
4555
  if (event_len < LOG_EVENT_HEADER_LEN)
4556
    return;
4557
  event_len -= LOG_EVENT_HEADER_LEN;
4558 4559 4560 4561 4562
  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);
4563 4564
}

4565

4566
#ifndef MYSQL_CLIENT
4567
int Slave_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4568 4569 4570
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
4571
  return 0;
4572
}
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4573
#endif /* !MYSQL_CLIENT */
4574 4575


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4576
/**************************************************************************
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4577
	Stop_log_event methods
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4578
**************************************************************************/
4579

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4580
/*
4581
  Stop_log_event::print()
4582
*/
4583 4584

#ifdef MYSQL_CLIENT
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4585
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4586
{
4587 4588 4589
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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4590
  if (print_event_info->short_form)
4591 4592
    return;

4593 4594
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
4595
}
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4596
#endif /* MYSQL_CLIENT */
4597

4598

4599
/*
4600
  Stop_log_event::do_apply_event()
4601 4602 4603 4604 4605 4606 4607 4608

  The master stopped.  We used to clean up all temporary tables but
  this is useless as, as the master has shut down properly, it has
  written all DROP TEMPORARY TABLE (prepared statements' deletion is
  TODO only when we binlog prep stmts).  We used to clean up
  slave_load_tmpdir, but this is useless as it has been cleared at the
  end of LOAD DATA INFILE.  So we have nothing to do here.  The place
  were we must do this cleaning is in
4609
  Start_log_event_v3::do_apply_event(), not here. Because if we come
4610
  here, the master was sane.
4611 4612
*/

4613
#ifndef MYSQL_CLIENT
4614
int Stop_log_event::do_update_pos(RELAY_LOG_INFO *rli)
4615
{
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4616 4617
  /*
    We do not want to update master_log pos because we get a rotate event
4618
    before stop, so by now group_master_log_name is set to the next log.
4619
    If we updated it, we will have incorrect master coordinates and this
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4620
    could give false triggers in MASTER_POS_WAIT() that we have reached
4621
    the target position when in fact we have not.
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4622
  */
4623 4624 4625 4626 4627 4628 4629
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4630 4631
  return 0;
}
4632

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4633
#endif /* !MYSQL_CLIENT */
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4634
#endif /* HAVE_REPLICATION */
4635

4636

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4637
/**************************************************************************
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4638
	Create_file_log_event methods
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4639
**************************************************************************/
4640 4641

/*
4642
  Create_file_log_event ctor
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4643
*/
4644 4645

#ifndef MYSQL_CLIENT
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4646 4647 4648 4649
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,
4650
                      bool ignore,
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4651
		      char* block_arg, uint block_len_arg, bool using_trans)
4652
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4653
		  using_trans),
4654
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4655
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4656
{
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4657
  DBUG_ENTER("Create_file_log_event");
4658
  sql_ex.force_new_format();
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4659
  DBUG_VOID_RETURN;
4660
}
4661

4662

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4663
/*
4664
  Create_file_log_event::write_data_body()
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4665
*/
4666

4667
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4668
{
4669 4670
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4671
    return res;
4672 4673
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
4674 4675
}

4676

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4677
/*
4678
  Create_file_log_event::write_data_header()
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4679
*/
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4680

4681
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4682
{
4683
  bool res;
4684
  uchar buf[CREATE_FILE_HEADER_LEN];
4685 4686
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4687
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4688
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4689 4690 4691
}


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4692
/*
4693
  Create_file_log_event::write_base()
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4694
*/
4695

4696
bool Create_file_log_event::write_base(IO_CACHE* file)
4697
{
4698 4699 4700 4701
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4702 4703 4704
  return res;
}

4705
#endif /* !MYSQL_CLIENT */
4706

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4707
/*
4708
  Create_file_log_event ctor
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4709
*/
4710

4711 4712 4713
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)
4714
{
4715 4716 4717 4718 4719
  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];
4720
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
4721 4722 4723 4724 4725 4726 4727
      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))
unknown's avatar
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4728
    DBUG_VOID_RETURN;
4729
  if (description_event->binlog_version!=1)
4730
  {
4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747
    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);
4748 4749 4750 4751 4752 4753 4754 4755 4756
    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;
4757
  }
unknown's avatar
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4758
  DBUG_VOID_RETURN;
4759 4760
}

4761

unknown's avatar
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4762
/*
4763
  Create_file_log_event::print()
unknown's avatar
unknown committed
4764
*/
4765 4766

#ifdef MYSQL_CLIENT
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4767
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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4768
				  bool enable_local)
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4769
{
4770 4771
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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4772
  if (print_event_info->short_form)
4773 4774
  {
    if (enable_local && check_fname_outside_temp_buf())
unknown's avatar
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4775
      Load_log_event::print(file, print_event_info);
4776
    return;
4777 4778 4779 4780
  }

  if (enable_local)
  {
unknown's avatar
unknown committed
4781
    Load_log_event::print(file, print_event_info,
4782
			  !check_fname_outside_temp_buf());
unknown's avatar
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4783 4784 4785 4786
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
4787
    my_b_printf(&cache, "#"); 
4788 4789
  }

4790
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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4791
}
4792

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4793

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4794
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4795
{
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4796
  print(file, print_event_info, 0);
4797
}
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4798
#endif /* MYSQL_CLIENT */
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4799

4800

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4801
/*
4802
  Create_file_log_event::pack_info()
unknown's avatar
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4803
*/
4804

unknown's avatar
SCRUM  
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4805
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4806
void Create_file_log_event::pack_info(Protocol *protocol)
4807
{
4808 4809 4810
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
unknown's avatar
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4811
  pos= strmov(pos + db_len, ";table=");
4812
  memcpy(pos, table_name, table_name_len);
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4813
  pos= strmov(pos + table_name_len, ";file_id=");
4814 4815 4816
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
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4817
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4818
}
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4819
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4820 4821


unknown's avatar
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4822
/*
4823
  Create_file_log_event::do_apply_event()
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4824
*/
4825

unknown's avatar
SCRUM  
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4826
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4827
int Create_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4828
{
unknown's avatar
unknown committed
4829 4830
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4831 4832 4833
  int fd = -1;
  IO_CACHE file;
  int error = 1;
unknown's avatar
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4834

4835
  bzero((char*)&file, sizeof(file));
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4836 4837
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4838
  thd->proc_info= proc_info;
4839 4840 4841 4842
  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 ||
4843 4844 4845
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4846 4847 4848
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
4849 4850 4851 4852
    goto err;
  }
  
  // a trick to avoid allocating another buffer
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4853 4854
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4855 4856
  if (write_base(&file))
  {
unknown's avatar
unknown committed
4857
    strmov(ext, ".info"); // to have it right in the error message
4858 4859 4860
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
4861 4862 4863 4864 4865 4866
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4867 4868 4869 4870
  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)
4871
  {
4872 4873 4874
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
4875 4876
    goto err;
  }
4877
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
4878
  {
4879 4880 4881
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
4882 4883
    goto err;
  }
4884 4885
  error=0;					// Everything is ok

4886 4887 4888 4889 4890
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
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4891
  thd->proc_info= 0;
4892
  return error == 0;
4893
}
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unknown committed
4894
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4895

4896

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4897
/**************************************************************************
unknown's avatar
unknown committed
4898
	Append_block_log_event methods
unknown's avatar
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4899
**************************************************************************/
4900

unknown's avatar
unknown committed
4901
/*
4902
  Append_block_log_event ctor
unknown's avatar
unknown committed
4903
*/
4904 4905

#ifndef MYSQL_CLIENT  
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4906 4907
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
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4908 4909 4910
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
unknown's avatar
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4911
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4912 4913
{
}
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4914
#endif
4915 4916


unknown's avatar
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4917
/*
4918
  Append_block_log_event ctor
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4919
*/
4920

4921 4922 4923
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)
4924
{
4925 4926 4927 4928 4929 4930
  DBUG_ENTER("Append_block_log_event::Append_block_log_event(char*,...)");
  uint8 common_header_len= description_event->common_header_len; 
  uint8 append_block_header_len=
    description_event->post_header_len[APPEND_BLOCK_EVENT-1];
  uint total_header_len= common_header_len+append_block_header_len;
  if (len < total_header_len)
unknown's avatar
unknown committed
4931
    DBUG_VOID_RETURN;
4932 4933 4934
  file_id= uint4korr(buf + common_header_len + AB_FILE_ID_OFFSET);
  block= (char*)buf + total_header_len;
  block_len= len - total_header_len;
unknown's avatar
unknown committed
4935
  DBUG_VOID_RETURN;
4936 4937 4938
}


unknown's avatar
unknown committed
4939
/*
4940
  Append_block_log_event::write()
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unknown committed
4941
*/
4942

4943
#ifndef MYSQL_CLIENT
4944
bool Append_block_log_event::write(IO_CACHE* file)
4945
{
4946
  uchar buf[APPEND_BLOCK_HEADER_LEN];
4947
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4948 4949
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4950
	  my_b_safe_write(file, (uchar*) block, block_len));
4951
}
4952
#endif
4953 4954


unknown's avatar
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4955
/*
4956
  Append_block_log_event::print()
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4957
*/
4958 4959

#ifdef MYSQL_CLIENT  
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4960
void Append_block_log_event::print(FILE* file,
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4961
				   PRINT_EVENT_INFO* print_event_info)
4962
{
4963 4964
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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4965
  if (print_event_info->short_form)
4966
    return;
4967 4968 4969
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#%s: file_id: %d  block_len: %d\n",
              get_type_str(), file_id, block_len);
4970
}
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4971
#endif /* MYSQL_CLIENT */
4972 4973


unknown's avatar
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4974
/*
4975
  Append_block_log_event::pack_info()
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4976
*/
4977

unknown's avatar
SCRUM  
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4978
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4979
void Append_block_log_event::pack_info(Protocol *protocol)
4980 4981 4982 4983 4984 4985
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
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4986
  protocol->store(buf, length, &my_charset_bin);
4987 4988 4989
}


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4990
/*
4991
  Append_block_log_event::get_create_or_append()
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4992 4993
*/

4994
int Append_block_log_event::get_create_or_append() const
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4995
{
4996
  return 0; /* append to the file, fail if not exists */
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4997 4998
}

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4999
/*
5000
  Append_block_log_event::do_apply_event()
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5001
*/
5002

5003
int Append_block_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5004
{
5005
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
5006
  int fd;
5007
  int error = 1;
5008
  DBUG_ENTER("Append_block_log_event::do_apply_event");
5009

unknown's avatar
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5010 5011
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
5012
  thd->proc_info= proc_info;
5013 5014 5015 5016 5017 5018 5019
  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)
    {
5020 5021 5022
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
5023 5024 5025
      goto err;
    }
  }
5026 5027
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
5028
  {
5029 5030 5031
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
5032 5033
    goto err;
  }
5034
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5035
  {
5036 5037 5038
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
5039 5040 5041
    goto err;
  }
  error=0;
5042

5043 5044 5045
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
5046
  thd->proc_info= 0;
5047
  DBUG_RETURN(error);
5048
}
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5049
#endif
5050 5051


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5052
/**************************************************************************
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5053
	Delete_file_log_event methods
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5054
**************************************************************************/
5055

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5056
/*
5057
  Delete_file_log_event ctor
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5058
*/
5059 5060

#ifndef MYSQL_CLIENT
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5061 5062 5063
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)
5064 5065
{
}
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5066
#endif
5067

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5068
/*
5069
  Delete_file_log_event ctor
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5070
*/
5071

5072 5073 5074
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)
5075
{
5076 5077 5078
  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))
5079
    return;
5080
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
5081 5082 5083
}


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5084
/*
5085
  Delete_file_log_event::write()
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5086
*/
5087

5088
#ifndef MYSQL_CLIENT
5089
bool Delete_file_log_event::write(IO_CACHE* file)
5090
{
5091
 uchar buf[DELETE_FILE_HEADER_LEN];
5092
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
5093 5094
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
5095
}
5096
#endif
5097 5098


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5099
/*
5100
  Delete_file_log_event::print()
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5101
*/
5102 5103

#ifdef MYSQL_CLIENT  
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5104
void Delete_file_log_event::print(FILE* file,
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				  PRINT_EVENT_INFO* print_event_info)
5106
{
5107 5108
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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5109
  if (print_event_info->short_form)
5110
    return;
5111 5112
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
5113
}
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#endif /* MYSQL_CLIENT */
5115

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5116
/*
5117
  Delete_file_log_event::pack_info()
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5118
*/
5119

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5120
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5121
void Delete_file_log_event::pack_info(Protocol *protocol)
5122 5123 5124 5125
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5126
  protocol->store(buf, (int32) length, &my_charset_bin);
5127
}
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5128
#endif
5129

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5130
/*
5131
  Delete_file_log_event::do_apply_event()
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5132
*/
5133

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5134
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5135
int Delete_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5136 5137
{
  char fname[FN_REFLEN+10];
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5138
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
5139
  (void) my_delete(fname, MYF(MY_WME));
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5140
  strmov(ext, ".info");
5141
  (void) my_delete(fname, MYF(MY_WME));
5142
  return 0;
5143
}
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#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5145 5146


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5147
/**************************************************************************
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5148
	Execute_load_log_event methods
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**************************************************************************/
5150

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5151
/*
5152
  Execute_load_log_event ctor
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5153
*/
5154 5155

#ifndef MYSQL_CLIENT  
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Execute_load_log_event::Execute_load_log_event(THD *thd_arg, const char* db_arg,
					       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id), db(db_arg)
5159 5160
{
}
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#endif
5162 5163
  

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5164
/*
5165
  Execute_load_log_event ctor
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5166
*/
5167

5168 5169 5170
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)
5171
{
5172 5173 5174
  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))
5175
    return;
5176
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
5177 5178 5179
}


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5180
/*
5181
  Execute_load_log_event::write()
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5182
*/
5183

5184
#ifndef MYSQL_CLIENT
5185
bool Execute_load_log_event::write(IO_CACHE* file)
5186
{
5187
  uchar buf[EXEC_LOAD_HEADER_LEN];
5188
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
5189 5190
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
5191
}
5192
#endif
5193 5194


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5195
/*
5196
  Execute_load_log_event::print()
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5197
*/
5198 5199

#ifdef MYSQL_CLIENT  
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void Execute_load_log_event::print(FILE* file,
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5201
				   PRINT_EVENT_INFO* print_event_info)
5202
{
5203 5204
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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5205
  if (print_event_info->short_form)
5206
    return;
5207 5208 5209
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
5210
}
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5211
#endif
5212

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5213
/*
5214
  Execute_load_log_event::pack_info()
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5215
*/
5216

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5217
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5218
void Execute_load_log_event::pack_info(Protocol *protocol)
5219 5220 5221 5222
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5223
  protocol->store(buf, (int32) length, &my_charset_bin);
5224 5225 5226
}


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5227
/*
5228
  Execute_load_log_event::do_apply_event()
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5229
*/
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5230

5231
int Execute_load_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5232 5233
{
  char fname[FN_REFLEN+10];
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5234
  char *ext;
5235
  int fd;
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5236
  int error= 1;
5237
  IO_CACHE file;
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  Load_log_event *lev= 0;
5239

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  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
5241 5242
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
5243 5244 5245
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5246 5247 5248
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
5249 5250
    goto err;
  }
5251
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
5252 5253
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
5254
      lev->get_type_code() != NEW_LOAD_EVENT)
5255
  {
5256
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
5257
                    "file '%s' appears corrupted", fname);
5258 5259
    goto err;
  }
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5260

5261
  lev->thd = thd;
5262
  /*
5263
    lev->do_apply_event should use rli only for errors i.e. should
5264 5265
    not advance rli's position.

5266
    lev->do_apply_event is the place where the table is loaded (it
5267
    calls mysql_load()).
5268
  */
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5269

5270 5271
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
  if (lev->do_apply_event(0,rli,1)) 
5272
  {
5273 5274 5275 5276 5277 5278 5279 5280
    /*
      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.
    */
5281
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
5282 5283
    if (tmp)
    {
5284
      rli->report(ERROR_LEVEL, rli->last_error().number,
5285
                  "%s. Failed executing load from '%s'", tmp, fname);
5286 5287
      my_free(tmp,MYF(0));
    }
5288 5289
    goto err;
  }
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5290 5291 5292 5293 5294 5295 5296 5297 5298 5299
  /*
    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;
  }
5300
  (void) my_delete(fname, MYF(MY_WME));
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  memcpy(ext, ".data", 6);
5302
  (void) my_delete(fname, MYF(MY_WME));
5303
  error = 0;
5304

5305 5306 5307
err:
  delete lev;
  if (fd >= 0)
5308
  {
5309
    my_close(fd, MYF(0));
5310 5311
    end_io_cache(&file);
  }
5312
  return error;
5313
}
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5314

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5315
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5316 5317


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5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342
/**************************************************************************
	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)
5343
int Begin_load_query_log_event::get_create_or_append() const
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5344
{
5345
  return 1; /* create the file */
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}
#endif /* defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


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


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


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

  buf+= desc_event->common_header_len;

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

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

  file_id= uint4korr(buf + ELQ_FILE_ID_OFFSET);
}


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


5400
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
5404
  uchar buf[EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN];
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  int4store(buf, file_id);
  int4store(buf + 4, fn_pos_start);
  int4store(buf + 4 + 4, fn_pos_end);
5408 5409
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
5411
#endif
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#ifdef MYSQL_CLIENT
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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info)
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{
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  print(file, print_event_info, 0);
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}


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void Execute_load_query_log_event::print(FILE* file,
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                                         PRINT_EVENT_INFO* print_event_info,
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                                         const char *local_fname)
{
5426 5427 5428
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
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  if (local_fname)
  {
5432
    my_b_write(&cache, (uchar*) query, fn_pos_start);
5433 5434 5435
    my_b_printf(&cache, " LOCAL INFILE \'");
    my_b_printf(&cache, local_fname);
    my_b_printf(&cache, "\'");
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    if (dup_handling == LOAD_DUP_REPLACE)
5437 5438
      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
5439
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
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5440
    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  }
  else
  {
5444
    my_b_write(&cache, (uchar*) query, q_len);
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5445
    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  }

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  if (!print_event_info->short_form)
5449
    my_b_printf(&cache, "# file_id: %d \n", file_id);
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}
#endif


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Execute_load_query_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
5458
  if (!(buf= (char*) my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME))))
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    return;
  pos= buf;
  if (db && db_len)
  {
    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
    pos= strmov(pos+db_len, "`; ");
  }
  if (query && q_len)
  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
  pos= strmov(pos, " ;file_id=");
  pos= int10_to_str((long) file_id, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}


int
5480
Execute_load_query_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
  char *p;
  char *buf;
  char *fname;
  char *fname_end;
  int error;

5488 5489
  buf= (char*) my_malloc(q_len + 1 - (fn_pos_end - fn_pos_start) +
                         (FN_REFLEN + 10) + 10 + 8 + 5, MYF(MY_WME));
5490 5491 5492

  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", buf= NULL;);

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  /* Replace filename and LOCAL keyword in query before executing it */
5494
  if (buf == NULL)
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  {
5496 5497
    rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR,
                ER(ER_SLAVE_FATAL_ERROR), "Not enough memory");
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    return 1;
  }

  p= buf;
  memcpy(p, query, fn_pos_start);
  p+= fn_pos_start;
5504
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
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  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
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5507
  *(p++)='\'';
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  switch (dup_handling) {
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5509
  case LOAD_DUP_IGNORE:
5510
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
5513
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
5519
  p= strmake(p, STRING_WITH_LEN(" INTO"));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

5522
  error= Query_log_event::do_apply_event(rli, buf, p-buf);
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  /* Forging file name for deletion in same buffer */
  *fname_end= 0;

5527 5528 5529 5530 5531 5532
  /*
    If there was an error the slave is going to stop, leave the
    file so that we can re-execute this event at START SLAVE.
  */
  if (!error)
    (void) my_delete(fname, MYF(MY_WME));
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
  return error;
}
#endif


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5540
/**************************************************************************
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5541
	sql_ex_info methods
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**************************************************************************/
5543

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5544
/*
5545
  sql_ex_info::write_data()
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5546
*/
5547

5548
bool sql_ex_info::write_data(IO_CACHE* file)
5549 5550 5551
{
  if (new_format())
  {
5552 5553 5554 5555 5556
    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) ||
5557
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568
  }
  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;
5569
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
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  }
}


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5574
/*
5575
  sql_ex_info::init()
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5576
*/
5577

5578
char *sql_ex_info::init(char *buf, char *buf_end, bool use_new_format)
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{
  cached_new_format = use_new_format;
  if (use_new_format)
  {
    empty_flags=0;
    /*
      The code below assumes that buf will not disappear from
      under our feet during the lifetime of the event. This assumption
      holds true in the slave thread if the log is in new format, but is not
      the case when we have old format because we will be reusing net buffer
      to read the actual file before we write out the Create_file event.
    */
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    const char *ptr= buf;
    if (read_str(&ptr, buf_end, (const char **) &field_term, &field_term_len) ||
	read_str(&ptr, buf_end, (const char **) &enclosed,   &enclosed_len) ||
	read_str(&ptr, buf_end, (const char **) &line_term,  &line_term_len) ||
	read_str(&ptr, buf_end, (const char **) &line_start, &line_start_len) ||
	read_str(&ptr, buf_end, (const char **) &escaped,    &escaped_len))
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      return 0;
    opt_flags = *buf++;
  }
  else
  {
    field_term_len= enclosed_len= line_term_len= line_start_len= escaped_len=1;
    field_term = buf++;			// Use first byte in string
    enclosed=	 buf++;
    line_term=   buf++;
    line_start=  buf++;
    escaped=     buf++;
    opt_flags =  *buf++;
    empty_flags= *buf++;
    if (empty_flags & FIELD_TERM_EMPTY)
      field_term_len=0;
    if (empty_flags & ENCLOSED_EMPTY)
      enclosed_len=0;
    if (empty_flags & LINE_TERM_EMPTY)
      line_term_len=0;
    if (empty_flags & LINE_START_EMPTY)
      line_start_len=0;
    if (empty_flags & ESCAPED_EMPTY)
      escaped_len=0;
  }
  return buf;
}
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/**************************************************************************
	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),
5633
    m_row_count(0),
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    m_table(tbl_arg),
    m_table_id(tid),
5636 5637
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0),
5638 5639
    m_flags(0)
{
5640 5641
  /*
    We allow a special form of dummy event when the table, and cols
5642
    are null and the table id is ~0UL.  This is a temporary
5643 5644
    solution, to be able to terminate a started statement in the
    binary log: the extreneous events will be removed in the future.
5645
   */
5646 5647
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5648 5649 5650 5651 5652 5653 5654 5655 5656 5657

  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)))
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  {
    /* 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));
  }
5663
  else
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  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= 0;
  }
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}
#endif

Rows_log_event::Rows_log_event(const char *buf, uint event_len,
                               Log_event_type event_type,
                               const Format_description_log_event
                               *description_event)
  : Log_event(buf, description_event),
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    m_row_count(0),
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    m_rows_buf(0), m_rows_cur(0), m_rows_end(0)
{
  DBUG_ENTER("Rows_log_event::Rows_log_event(const char*,...)");
  uint8 const common_header_len= description_event->common_header_len;
  uint8 const post_header_len= description_event->post_header_len[event_type-1];

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

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

  m_flags= uint2korr(post_start);

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  uchar const *const var_start=
    (const uchar *)buf + common_header_len + post_header_len;
  uchar const *const ptr_width= var_start;
5707
  uchar *ptr_after_width= (uchar*) ptr_width;
5708
  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
5709
  m_width = net_field_length(&ptr_after_width);
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  DBUG_PRINT("debug", ("m_width=%lu", m_width));
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols,
                          m_width <= sizeof(m_bitbuf)*8 ? m_bitbuf : NULL,
                          (m_width + 7) & ~7UL,
                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
    ptr_after_width+= (m_width + 7) / 8;
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    DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
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  }
  else
  {
    // Needed because bitmap_init() does not set it to null on failure
    m_cols.bitmap= NULL;
    DBUG_VOID_RETURN;
  }
5728

5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743
  m_cols_ai.bitmap= m_cols.bitmap; /* See explanation in is_valid() */

  if (event_type == UPDATE_ROWS_EVENT)
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));

    /* if bitmap_init fails, catched in is_valid() */
    if (likely(!bitmap_init(&m_cols_ai,
                            m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
                            (m_width + 7) & ~7UL,
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
      ptr_after_width+= (m_width + 7) / 8;
5744 5745
      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
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    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

5755
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
5756

5757
  size_t const data_size= event_len - (ptr_rows_data - (const uchar *) buf);
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  DBUG_PRINT("info",("m_table_id: %lu  m_flags: %d  m_width: %lu  data_size: %lu",
5759
                     m_table_id, m_flags, m_width, (ulong) data_size));
5760

5761
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
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  if (likely((bool)m_rows_buf))
  {
    m_rows_end= m_rows_buf + data_size;
    m_rows_cur= m_rows_end;
    memcpy(m_rows_buf, ptr_rows_data, data_size);
  }
  else
    m_cols.bitmap= 0; // to not free it

  DBUG_VOID_RETURN;
}

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

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int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

5786 5787
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
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  DBUG_EXECUTE_IF("old_row_based_repl_4_byte_map_id_master",
                  return 6 + no_bytes_in_map(&m_cols) + (end - buf) +
                  (type_code == UPDATE_ROWS_EVENT ? no_bytes_in_map(&m_cols_ai) : 0) +
                  (m_rows_cur - m_rows_buf););
  int data_size= ROWS_HEADER_LEN;
  data_size+= no_bytes_in_map(&m_cols);
  data_size+= end - buf;

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

  data_size+= (m_rows_cur - m_rows_buf);
  return data_size; 
}


5805
#ifndef MYSQL_CLIENT
5806
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
5807 5808 5809 5810 5811 5812
{
  /*
    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
  */
5813
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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  DBUG_PRINT("enter", ("row_data: 0x%lx  length: %lu", (ulong) row_data,
                       (ulong) length));
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  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
5821
  DBUG_DUMP("row_data", row_data, min(length, 32));
5822
#endif
5823 5824

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
5825
  DBUG_ASSERT(!m_rows_buf || m_rows_end && m_rows_buf < m_rows_end);
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  DBUG_ASSERT(m_rows_cur <= m_rows_end);

  /* The cast will always work since m_rows_cur <= m_rows_end */
5829
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
5830
  {
5831
    size_t const block_size= 1024;
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    my_ptrdiff_t const cur_size= m_rows_cur - m_rows_buf;
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    my_ptrdiff_t const new_alloc= 
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        block_size * ((cur_size + length + block_size - 1) / block_size);
5835

5836
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
5837
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854
    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;
  }

5855
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
5856 5857
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
5858
  m_row_count++;
5859 5860 5861 5862 5863
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
5864
int Rows_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5865
{
5866
  DBUG_ENTER("Rows_log_event::do_apply_event(st_relay_log_info*)");
5867
  int error= 0;
5868
  uchar const *row_start= m_rows_buf;
5869 5870

  /*
5871 5872 5873
    If m_table_id == ~0UL, then we have a dummy event that does not
    contain any data.  In that case, we just remove all tables in the
    tables_to_lock list, close the thread tables, and return with
5874
    success.
5875
   */
5876
  if (m_table_id == ~0UL)
5877 5878 5879 5880 5881 5882 5883
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

5884
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5885
    close_thread_tables(thd);
5886 5887 5888
    thd->clear_error();
    DBUG_RETURN(0);
  }
5889 5890 5891

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
5892
    do_apply_event(). We still check here to prevent future coding
5893
    errors.
5894 5895 5896 5897
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
5898 5899 5900 5901
    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.
5902
  */
5903
  if (!thd->lock)
5904
  {
5905 5906
    bool need_reopen= 1; /* To execute the first lap of the loop below */

5907
    /*
5908
      lock_tables() reads the contents of thd->lex, so they must be
5909
      initialized. Contrary to in
5910
      Table_map_log_event::do_apply_event() we don't call
5911
      mysql_init_query() as that may reset the binlog format.
5912
    */
5913
    lex_start(thd);
5914

5915 5916 5917
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
5918 5919
      if (!need_reopen)
      {
5920 5921 5922 5923 5924 5925 5926
        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;
5927 5928 5929 5930 5931
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' in %s event: when locking tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"),
                      get_type_str());
5932 5933 5934 5935
          thd->is_fatal_error= 1;
        }
        else
        {
5936 5937 5938
          rli->report(ERROR_LEVEL, error,
                      "Error in %s event: when locking tables",
                      get_type_str());
5939
        }
5940
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5941 5942
        DBUG_RETURN(error);
      }
5943

5944
      /*
5945
        So we need to reopen the tables.
5946

5947 5948
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
5949

5950 5951 5952
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
5953

5954 5955
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
5956 5957
       */
      thd->binlog_flush_pending_rows_event(false);
5958 5959
      TABLE_LIST *tables= rli->tables_to_lock;
      close_tables_for_reopen(thd, &tables);
5960

5961 5962
      uint tables_count= rli->tables_to_lock_count;
      if ((error= open_tables(thd, &tables, &tables_count, 0)))
5963 5964 5965 5966 5967 5968 5969 5970
      {
        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;
5971 5972 5973 5974
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' on reopening tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"));
5975 5976
          thd->query_error= 1;
        }
5977
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5978
        DBUG_RETURN(error);
5979
      }
5980
    }
5981 5982 5983 5984 5985 5986 5987 5988 5989 5990

    /*
      When the open and locking succeeded, we check all tables to
      ensure that they still have the correct type.

      We can use a down cast here since we know that every table added
      to the tables_to_lock is a RPL_TABLE_LIST.
    */

    {
5991
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
5992 5993 5994 5995 5996 5997 5998
      for ( ; ptr ; ptr= static_cast<RPL_TABLE_LIST*>(ptr->next_global))
      {
        if (ptr->m_tabledef.compatible_with(rli, ptr->table))
        {
          mysql_unlock_tables(thd, thd->lock);
          thd->lock= 0;
          thd->query_error= 1;
5999
          const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
6000 6001 6002 6003 6004
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

6005
    /*
6006 6007
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
6008 6009 6010

      We also invalidate the query cache for all the tables, since
      they will now be changed.
6011 6012 6013 6014 6015 6016 6017

      TODO [/Matz]: Maybe the query cache should not be invalidated
      here? It might be that a table is not changed, even though it
      was locked for the statement.  We do know that each
      Rows_log_event contain at least one row, so after processing one
      Rows_log_event, we can invalidate the query cache for the
      associated table.
6018
     */
6019
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
6020
    {
6021
      const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
6022
    }
6023 6024 6025
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
6026
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
6027 6028
  }

6029 6030
  DBUG_ASSERT(rli->tables_to_lock == NULL && rli->tables_to_lock_count == 0);

6031
  TABLE* table= const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.get_table(m_table_id);
6032 6033 6034 6035 6036

  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
6037
      (this was set up by Table_map_log_event::do_apply_event()
6038
      which tested replicate-* rules).
6039
    */
6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066

    /*
      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));

6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077
    /*
      Now we are in a statement and will stay in a statement until we
      see a STMT_END_F.

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

6078
    error= do_before_row_operations(table);
6079
    while (error == 0 && row_start < m_rows_end)
6080
    {
6081
      uchar const *row_end= NULL;
6082
      if ((error= do_prepare_row(thd, rli, table, row_start, &row_end)))
6083 6084
        break; // We should perform the after-row operation even in
               // the case of error
6085

6086
      DBUG_ASSERT(row_end != NULL); // cannot happen
6087
      DBUG_ASSERT(row_end <= m_rows_end);
6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105

      /* 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:
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	rli->report(ERROR_LEVEL, thd->net.last_errno,
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                    "Error in %s event: row application failed",
                    get_type_str());
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	thd->query_error= 1;
	break;
      }

      row_start= row_end;
    }
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
6116
                    const_cast<RELAY_LOG_INFO*>(rli)->abort_slave= 1;);
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    error= do_after_row_operations(table, error);
    if (!cache_stmt)
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    {
      DBUG_PRINT("info", ("Marked that we need to keep log"));
      thd->options|= OPTION_KEEP_LOG;
    }
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  }

  if (error)
  {                     /* error has occured during the transaction */
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    rli->report(ERROR_LEVEL, thd->net.last_errno,
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                "Error in %s event: error during transaction execution "
                "on table %s.%s",
                get_type_str(), table->s->db.str,
                table->s->table_name.str);
6132

6133
    /*
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      If one day we honour --skip-slave-errors in row-based replication, and
      the error should be skipped, then we would clear mappings, rollback,
      close tables, but the slave SQL thread would not stop and then may
      assume the mapping is still available, the tables are still open...
      So then we should clear mappings/rollback/close here only if this is a
      STMT_END_F.
      For now we code, knowing that error is not skippable and so slave SQL
      thread is certainly going to stop.
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      rollback at the caller along with sbr.
6143
    */
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    thd->reset_current_stmt_binlog_row_based();
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    const_cast<RELAY_LOG_INFO*>(rli)->cleanup_context(thd, error);
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    thd->query_error= 1;
    DBUG_RETURN(error);
  }

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  /*
    This code would ideally be placed in do_update_pos() instead, but
    since we have no access to table there, we do the setting of
    last_event_start_time here instead.
  */
  if (table && (table->s->primary_key == MAX_KEY) &&
      !cache_stmt && get_flags(STMT_END_F) == RLE_NO_FLAGS)
  {
    /*
      ------------ Temporary fix until WL#2975 is implemented ---------

      This event is not the last one (no STMT_END_F). If we stop now
      (in case of terminate_slave_thread()), how will we restart? We
      have to restart from Table_map_log_event, but as this table is
      not transactional, the rows already inserted will still be
      present, and idempotency is not guaranteed (no PK) so we risk
      that repeating leads to double insert. So we desperately try to
      continue, hope we'll eventually leave this buggy situation (by
      executing the final Rows_log_event). If we are in a hopeless
      wait (reached end of last relay log and nothing gets appended
      there), we timeout after one minute, and notify DBA about the
      problem.  When WL#2975 is implemented, just remove the member
      st_relay_log_info::last_event_start_time and all its occurences.
    */
    const_cast<RELAY_LOG_INFO*>(rli)->last_event_start_time= time(0);
  }

  DBUG_RETURN(0);
}

6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193
Log_event::enum_skip_reason
Rows_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  /*
    If the slave skip counter is 1 and this event does not end a
    statement, then we should not start executing on the next event.
    Otherwise, we defer the decision to the normal skipping logic.
  */
  if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}

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int
Rows_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
  DBUG_ENTER("Rows_log_event::do_update_pos");
  int error= 0;

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

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  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);
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    /*
      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);
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    /*
      Now what if this is not a transactional engine? we still need to
      flush the pending event to the binlog; we did it with
      thd->binlog_flush_pending_rows_event(). Note that we imitate
      what is done for real queries: a call to
      ha_autocommit_or_rollback() (sometimes only if involves a
      transactional engine), and a call to be sure to have the pending
      event flushed.
    */

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    thd->reset_current_stmt_binlog_row_based();
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    rli->cleanup_context(thd, 0);
6245 6246
    if (error == 0)
    {
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      /*
        Indicate that a statement is finished.
        Step the group log position if we are not in a transaction,
        otherwise increase the event log position.
       */
      rli->stmt_done(log_pos, when);

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      /*
        Clear any errors pushed in thd->net.last_err* if for example "no key
        found" (as this is allowed). This is a safety measure; apparently
        those errors (e.g. when executing a Delete_rows_log_event of a
        non-existing row, like in rpl_row_mystery22.test,
        thd->net.last_error = "Can't find record in 't1'" and last_errno=1032)
        do not become visible. We still prefer to wipe them out.
      */
      thd->clear_error();
    }
    else
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      rli->report(ERROR_LEVEL, error,
                  "Error in %s event: commit of row events failed, "
                  "table `%s`.`%s`",
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                  get_type_str(), m_table->s->db.str,
                  m_table->s->table_name.str);
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  }
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  else
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  {
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    rli->inc_event_relay_log_pos();
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  }

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  DBUG_RETURN(error);
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}
6278

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

#ifndef MYSQL_CLIENT
bool Rows_log_event::write_data_header(IO_CACHE *file)
{
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  uchar 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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  uchar sbuf[sizeof(m_width)];
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  my_ptrdiff_t const data_size= m_rows_cur - m_rows_buf;
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  bool res= false;
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  uchar *const sbuf_end= net_store_length(sbuf, (size_t) m_width);
  DBUG_ASSERT(static_cast<size_t>(sbuf_end - sbuf) <= sizeof(sbuf));
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  DBUG_DUMP("m_width", sbuf, (size_t) (sbuf_end - sbuf));
  res= res || my_b_safe_write(file, sbuf, (size_t) (sbuf_end - sbuf));
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  DBUG_DUMP("m_cols", (uchar*) m_cols.bitmap, no_bytes_in_map(&m_cols));
  res= res || my_b_safe_write(file, (uchar*) m_cols.bitmap,
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                              no_bytes_in_map(&m_cols));
  /*
    TODO[refactor write]: Remove the "down cast" here (and elsewhere).
   */
  if (get_type_code() == UPDATE_ROWS_EVENT)
  {
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    DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
              no_bytes_in_map(&m_cols_ai));
    res= res || my_b_safe_write(file, (uchar*) m_cols_ai.bitmap,
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                                no_bytes_in_map(&m_cols_ai));
  }
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  DBUG_DUMP("rows", m_rows_buf, data_size);
  res= res || my_b_safe_write(file, m_rows_buf, (size_t) data_size);
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  return res;

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}
#endif

6333
#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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  size_t bytes= my_snprintf(buf, sizeof(buf),
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                               "table_id: %lu%s", m_table_id, flagstr);
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  protocol->store(buf, bytes, &my_charset_bin);
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}
#endif

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#ifdef MYSQL_CLIENT
void Rows_log_event::print_helper(FILE *file,
                                  PRINT_EVENT_INFO *print_event_info,
                                  char const *const name)
{
  IO_CACHE *const head= &print_event_info->head_cache;
  IO_CACHE *const body= &print_event_info->body_cache;
  if (!print_event_info->short_form)
  {
    bool const last_stmt_event= get_flags(STMT_END_F);
    print_header(head, print_event_info, !last_stmt_event);
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    my_b_printf(head, "\t%s: table id %lu%s\n",
                name, m_table_id,
                last_stmt_event ? " flags: STMT_END_F" : "");
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    print_base64(body, print_event_info, !last_stmt_event);
  }

  if (get_flags(STMT_END_F))
  {
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    copy_event_cache_to_file_and_reinit(head, file);
    copy_event_cache_to_file_and_reinit(body, file);
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  }
}
#endif

6370
/**************************************************************************
6371
	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)
{
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  DBUG_ASSERT(m_table_id != ~0UL);
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  /*
    In TABLE_SHARE, "db" and "table_name" are 0-terminated (see this comment in
    table.cc / alloc_table_share():
      Use the fact the key is db/0/table_name/0
    As we rely on this let's assert it.
  */
  DBUG_ASSERT((tbl->s->db.str == 0) ||
              (tbl->s->db.str[tbl->s->db.length] == 0));
  DBUG_ASSERT(tbl->s->table_name.str[tbl->s->table_name.length] == 0);


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

  /* If malloc fails, catched in is_valid() */
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  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
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  {
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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];
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  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
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                     event_len, common_header_len, post_header_len));

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  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
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  DBUG_DUMP("event buffer", (uchar*) buf, event_len);
6447
#endif
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  /* Read the post-header */
  const char *post_start= buf + common_header_len;

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

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

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

  /* Extract the length of the various parts from the buffer */
6474
  uchar const *const ptr_dblen= (uchar const*)vpart + 0;
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  m_dblen= *(uchar*) ptr_dblen;
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  /* Length of database name + counter + terminating null */
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  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
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  /* Length of table name + counter + terminating null */
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  uchar const *const ptr_colcnt= ptr_tbllen + m_tbllen + 2;
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  uchar *ptr_after_colcnt= (uchar*) ptr_colcnt;
  m_colcnt= net_field_length(&ptr_after_colcnt);
6485

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  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
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                     (ulong) m_dblen, (long) (ptr_dblen-(const uchar*)vpart), 
                     (ulong) m_tbllen, (long) (ptr_tbllen-(const uchar*)vpart),
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                     m_colcnt, (long) (ptr_colcnt-(const uchar*)vpart)));
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  /* Allocate mem for all fields in one go. If fails, catched in is_valid() */
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  m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                     &m_dbnam, (uint) m_dblen + 1,
                                     &m_tblnam, (uint) m_tbllen + 1,
                                     &m_coltype, (uint) m_colcnt,
                                     NullS);
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  if (m_memory)
  {
    /* Copy the different parts into their memory */
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    strncpy(const_cast<char*>(m_dbnam), (const char*)ptr_dblen  + 1, m_dblen + 1);
    strncpy(const_cast<char*>(m_tblnam), (const char*)ptr_tbllen + 1, m_tbllen + 1);
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    memcpy(m_coltype, ptr_after_colcnt, m_colcnt);
  }

  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)
6527
int Table_map_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
6528
{
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  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
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  DBUG_ENTER("Table_map_log_event::do_apply_event(st_relay_log_info*)");
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  DBUG_ASSERT(rli->sql_thd == thd);

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

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  if (!(memory= my_multi_malloc(MYF(MY_WME),
                                &table_list, (uint) sizeof(RPL_TABLE_LIST),
                                &db_mem, (uint) NAME_LEN + 1,
                                &tname_mem, (uint) NAME_LEN + 1,
                                NullS)))
6546
    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
6547 6548 6549 6550 6551 6552 6553 6554 6555 6556

  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);
6557 6558 6559

  int error= 0;

6560 6561 6562
  if (!rpl_filter->db_ok(table_list->db) ||
      (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list)))
  {
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    my_free(memory, MYF(MY_WME));
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  }
  else
6566
  {
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    /*
      open_tables() reads the contents of thd->lex, so they must be
      initialized, so we should call lex_start(); to be even safer, we
      call mysql_init_query() which does a more complete set of inits.
    */
6572 6573
    lex_start(thd);
    mysql_reset_thd_for_next_command(thd);
6574
    /*
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      Check if the slave is set to use SBR.  If so, it should switch
      to using RBR until the end of the "statement", i.e., next
      STMT_END_F or next error.
6578
    */
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    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
6581
    {
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      thd->set_current_stmt_binlog_row_based();
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    }

    /*
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      Open the table if it is not already open and add the table to
      table map.  Note that for any table that should not be
      replicated, a filter is needed.

      The creation of a new TABLE_LIST is used to up-cast the
      table_list consisting of RPL_TABLE_LIST items. This will work
      since the only case where the argument to open_tables() is
      changed, is when thd->lex->query_tables == table_list, i.e.,
      when the statement requires prelocking. Since this is not
      executed when a statement is executed, this case will not occur.
      As a precaution, an assertion is added to ensure that the bad
      case is not a fact.

      Either way, the memory in the list is *never* released
      internally in the open_tables() function, hence we take a copy
      of the pointer to make sure that it's not lost.
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    */
    uint count;
6604 6605 6606
    DBUG_ASSERT(thd->lex->query_tables != table_list);
    TABLE_LIST *tmp_table_list= table_list;
    if ((error= open_tables(thd, &tmp_table_list, &count, 0)))
6607
    {
6608
      if (thd->query_error || thd->is_fatal_error)
6609
      {
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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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        rli->report(ERROR_LEVEL, actual_error,
                    "Error '%s' on opening table `%s`.`%s`",
                    (actual_error ? thd->net.last_error :
                     "unexpected success or fatal error"),
                    table_list->db, table_list->table_name);
6620
        thd->query_error= 1;
6621
      }
6622
      goto err;
6623 6624
    }

6625
    m_table= table_list->table;
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    /*
      This will fail later otherwise, the 'in_use' field should be
      set to the current thread.
    */
    DBUG_ASSERT(m_table->in_use);

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    /*
      Use placement new to construct the table_def instance in the
      memory allocated for it inside table_list.
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      The memory allocated by the table_def structure (i.e., not the
      memory allocated *for* the table_def structure) is released
      inside st_relay_log_info::clear_tables_to_lock() by calling the
      table_def destructor explicitly.
6641
    */
6642
    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt);
6643
    table_list->m_tabledef_valid= TRUE;
6644 6645

    /*
6646
      We record in the slave's information that the table should be
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6647
      locked by linking the table into the list of tables to lock.
6648
    */
6649
    table_list->next_global= table_list->next_local= rli->tables_to_lock;
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    const_cast<RELAY_LOG_INFO*>(rli)->tables_to_lock= table_list;
    const_cast<RELAY_LOG_INFO*>(rli)->tables_to_lock_count++;
6652
    /* 'memory' is freed in clear_tables_to_lock */
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  }

6655
  DBUG_RETURN(error);
6656

6657
err:
6658
  my_free(memory, MYF(MY_WME));
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  DBUG_RETURN(error);
}
6661

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Log_event::enum_skip_reason
Table_map_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
{
  /*
    If the slave skip counter is 1, then we should not start executing
    on the next event.
  */
  if (rli->slave_skip_counter == 1)
    return Log_event::EVENT_SKIP_IGNORE;
  else
    return Log_event::do_shall_skip(rli);
}

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

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

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
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  DBUG_ASSERT(m_table_id != ~0UL);
6687
  uchar buf[TABLE_MAP_HEADER_LEN];
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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 + TM_MAPID_OFFSET, (ulonglong)m_table_id);
  int2store(buf + TM_FLAGS_OFFSET, m_flags);
  return (my_b_safe_write(file, buf, TABLE_MAP_HEADER_LEN));
}

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

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  uchar const dbuf[]= { (uchar) m_dblen };
  uchar const tbuf[]= { (uchar) m_tbllen };
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  uchar cbuf[sizeof(m_colcnt)];
  uchar *const cbuf_end= net_store_length(cbuf, (size_t) m_colcnt);
  DBUG_ASSERT(static_cast<size_t>(cbuf_end - cbuf) <= sizeof(cbuf));
6713

6714
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
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          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
          my_b_safe_write(file, 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.
 */

6730
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
6734
    size_t bytes= my_snprintf(buf, sizeof(buf),
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                                 "table_id: %lu (%s.%s)",
6736
                              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)
  {
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    print_header(&print_event_info->head_cache, print_event_info, TRUE);
    my_b_printf(&print_event_info->head_cache,
                "\tTable_map: `%s`.`%s` mapped to number %lu\n",
                m_dbnam, m_tblnam, m_table_id);
    print_base64(&print_event_info->body_cache, print_event_info, TRUE);
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  }
}
#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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  /* 
     Do not raise the error flag in case of hitting to an unique attribute
  */
  table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
  /* 
     NDB specific: update from ndb master wrapped as Write_rows
  */
  /*
    so that the event should be applied to replace slave's row
  */
  table->file->extra(HA_EXTRA_WRITE_CAN_REPLACE);
  /* 
     NDB specific: if update from ndb master wrapped as Write_rows
     does not find the row it's assumed idempotent binlog applying
     is taking place; don't raise the error.
  */
  table->file->extra(HA_EXTRA_IGNORE_NO_KEY);
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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.
  */
6830
  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)
{
6852 6853 6854 6855 6856 6857 6858 6859 6860
  int local_error= 0;
  table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
  table->file->extra(HA_EXTRA_WRITE_CANNOT_REPLACE);
  /*
    reseting the extra with 
    table->file->extra(HA_EXTRA_NO_IGNORE_NO_KEY); 
    fires bug#27077
    todo: explain or fix
  */
6861
  if ((local_error= table->file->ha_end_bulk_insert()))
6862 6863 6864 6865
  {
    table->file->print_error(local_error, MYF(0));
  }
  return error? error : local_error;
6866 6867
}

6868
int Write_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
6869
                                         TABLE *table,
6870 6871
                                         uchar const *const row_start,
                                         uchar const **const row_end)
6872 6873
{
  DBUG_ASSERT(table != NULL);
6874 6875
  DBUG_ASSERT(row_start && row_end);

6876 6877 6878 6879 6880 6881
  if (int error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                            &m_master_reclength, table->write_set, WRITE_ROWS_EVENT))
  {
    thd->net.last_errno= error;
    return error;
  }
6882
  bitmap_copy(table->read_set, table->write_set);
6883
  return 0;
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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; }
  };

}


6929 6930 6931 6932 6933 6934 6935 6936 6937 6938
/*
  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,
6939
                         size_t master_reclength,
6940 6941
                         my_ptrdiff_t master_fields)
{
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6942
  DBUG_PRINT("info", ("Copying to 0x%lx "
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6943
                      "from field %lu at offset %lu "
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6944 6945
                      "to field %d at offset %lu",
                      (long) table->record[0],
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                      (ulong) master_fields, (ulong) master_reclength,
6947
                      table->s->fields, table->s->reclength));
6948 6949 6950 6951 6952
  /*
    Copying the extra fields of the slave that does not exist on
    master into record[0] (which are basically the default values).
  */
  DBUG_ASSERT(master_reclength <= table->s->reclength);
6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995
  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;

6996
      case MYSQL_TYPE_BIT:
6997
        Field_bit *f= static_cast<Field_bit*>(*field_ptr);
6998 6999 7000 7001 7002 7003 7004
        if (f->bit_len > 0)
        {
          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);
        }
7005 7006 7007 7008 7009 7010 7011
        break;
      }
    }
  }
  return 0;                                     // All OK
}

7012 7013
#define DBUG_PRINT_BITSET(N,FRM,BS)                \
  do {                                             \
7014 7015 7016 7017 7018 7019 7020
    char buf[256];                                 \
    for (uint i = 0 ; i < (BS)->n_bits ; ++i)      \
      buf[i] = bitmap_is_set((BS), i) ? '1' : '0'; \
    buf[(BS)->n_bits] = '\0';                      \
    DBUG_PRINT((N), ((FRM), buf));                 \
  } while (0)

7021

7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047
/**
   Check if an error is a duplicate key error.

   This function is used to check if an error code is one of the
   duplicate key error, i.e., and error code for which it is sensible
   to do a <code>get_dup_key()</code> to retrieve the duplicate key.

   @param errcode The error code to check.

   @return <code>true</code> if the error code is such that
   <code>get_dup_key()</code> will return true, <code>false</code>
   otherwise.
 */
bool
is_duplicate_key_error(int errcode)
{
  switch (errcode)
  {
  case HA_ERR_FOUND_DUPP_KEY:
  case HA_ERR_FOUND_DUPP_UNIQUE:
    return true;
  }
  return false;
}


7048 7049 7050
/*
  Replace the provided record in the database.

7051 7052 7053 7054 7055 7056 7057 7058
  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.
7059

7060 7061
  RETURN VALUE
      Error code on failure, 0 on success.
7062

7063 7064 7065 7066
  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.
7067 7068
 */
static int
7069 7070 7071
replace_record(THD *thd, TABLE *table,
               ulong const master_reclength,
               uint const master_fields)
7072
{
7073
  DBUG_ENTER("replace_record");
7074 7075 7076 7077 7078 7079
  DBUG_ASSERT(table != NULL && thd != NULL);

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

7080
#ifndef DBUG_OFF
7081
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7082 7083 7084 7085
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

7086 7087
  while ((error= table->file->ha_write_row(table->record[0])))
  {
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    if (error == HA_ERR_LOCK_DEADLOCK || error == HA_ERR_LOCK_WAIT_TIMEOUT)
    {
      table->file->print_error(error, MYF(0)); /* to check at exec_relay_log_event */
      DBUG_RETURN(error);
    }
7093 7094 7095
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
      /* We failed to retrieve the duplicate key */
7096
      DBUG_RETURN(error);
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    }

    /*
       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.
     */
7109
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
7110
    {
7111
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
7112
      if (error)
7113 7114
      {
        table->file->print_error(error, MYF(0));
7115
        DBUG_RETURN(error);
7116
      }
7117 7118 7119 7120 7121
    }
    else
    {
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
7122
        DBUG_RETURN(my_errno);
7123 7124 7125 7126 7127 7128
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
7129
          DBUG_RETURN(ENOMEM);
7130 7131
      }

7132
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum, 0);
7133
      error= table->file->index_read_idx(table->record[1], keynum,
7134
                                         (const uchar*)key.get(),
7135
                                         HA_WHOLE_KEY,
7136 7137
                                         HA_READ_KEY_EXACT);
      if (error)
7138 7139
      {
        table->file->print_error(error, MYF(0));
7140
        DBUG_RETURN(error);
7141
      }
7142 7143 7144 7145 7146 7147 7148
    }

    /*
       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).

7149 7150 7151
       First we copy the columns into table->record[0] that are not
       present on the master from table->record[1], if there are any.
    */
7152
    copy_extra_record_fields(table, master_reclength, master_fields);
7153

7154
    /*
7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173
       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]);
7174 7175
      if (error)
        table->file->print_error(error, MYF(0));
7176
      DBUG_RETURN(error);
7177 7178 7179 7180
    }
    else
    {
      if ((error= table->file->ha_delete_row(table->record[1])))
7181 7182
      {
        table->file->print_error(error, MYF(0));
7183
        DBUG_RETURN(error);
7184
      }
7185 7186 7187
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
7188

7189
  DBUG_RETURN(error);
7190 7191 7192 7193 7194
}

int Write_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);
7195
  int error= replace_record(thd, table, m_master_reclength, m_width);
7196 7197 7198 7199 7200 7201 7202
  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)
{
7203
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
7204 7205 7206 7207 7208 7209 7210 7211
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7212 7213 7214 7215 7216 7217
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
7218
{
7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231
  /*
    Need to set the X bit and the filler bits in both records since
    there are engines that do not set it correctly.

    In addition, since MyISAM checks that one hasn't tampered with the
    record, it is necessary to restore the old bytes into the record
    after doing the comparison.

    TODO[record format ndb]: Remove it once NDB returns correct
    records. Check that the other engines also return correct records.
   */

  bool result= FALSE;
7232
  uchar saved_x[2], saved_filler[2];
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  if (table->s->null_bytes > 0)
  {
    for (int i = 0 ; i < 2 ; ++i)
    {
      saved_x[i]= table->record[i][0];
      saved_filler[i]= table->record[i][table->s->null_bytes - 1];
      table->record[i][0]|= 1U;
      table->record[i][table->s->null_bytes - 1]|=
        256U - (1U << table->s->last_null_bit_pos);
    }
  }

7246
  if (table->s->blob_fields + table->s->varchar_fields == 0)
7247 7248 7249 7250 7251
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

7252 7253 7254 7255
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
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  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

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  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
7263
  {
7264
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
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    {
      result= TRUE;
      goto record_compare_exit;
    }
7269
  }
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record_compare_exit:
  /*
    Restore the saved bytes.

    TODO[record format ndb]: Remove this code once NDB returns the
    correct record format.
  */
  if (table->s->null_bytes > 0)
  {
    for (int i = 0 ; i < 2 ; ++i)
    {
      table->record[i][0]= saved_x[i];
      table->record[i][table->s->null_bytes - 1]= saved_filler[i];
    }
7285
  }
7286 7287

  return result;
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}


/*
  Find the row given by 'key', if the table has keys, or else use a table scan
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  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.

  @param table Pointer to table to search
  @param key   Pointer to key to use for search, if table has key

  @pre <code>table->record[0]</code> shall contain the row to locate
  and <code>key</code> shall contain a key to use for searching, if
  the engine has a key.

  @post If the return value is zero, <code>table->record[1]</code>
  will contain the fetched row and the internal "cursor" will refer to
  the row. If the return value is non-zero,
  <code>table->record[1]</code> is undefined.  In either case,
  <code>table->record[0]</code> is undefined.

  @return Zero if the row was successfully fetched into
  <code>table->record[1]</code>, error code otherwise.
7313
 */
7314

7315
static int find_and_fetch_row(TABLE *table, uchar *key)
7316
{
7317
  DBUG_ENTER("find_and_fetch_row(TABLE *table, uchar *key, uchar *record)");
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  DBUG_PRINT("enter", ("table: 0x%lx, key: 0x%lx  record: 0x%lx",
		       (long) table, (long) key, (long) table->record[1]));
7320 7321 7322

  DBUG_ASSERT(table->in_use != NULL);

7323
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7324

7325 7326
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
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  {
    /*
      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
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      the "cursor" (i.e., record[0] in this case) at the correct row.
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      TODO: Add a check that the correct record has been fetched by
      comparing with the original record. Take into account that the
      record on the master and slave can be of different
      length. Something along these lines should work:

      ADD>>>  store_record(table,record[1]);
              int error= table->file->rnd_pos(table->record[0], table->file->ref);
      ADD>>>  DBUG_ASSERT(memcmp(table->record[1], table->record[0],
                                 table->s->reclength) == 0);

7345 7346
    */
    table->file->position(table->record[0]);
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    int error= table->file->rnd_pos(table->record[0], table->file->ref);
    /*
      rnd_pos() returns the record in table->record[0], so we have to
      move it to table->record[1].
     */
    bmove_align(table->record[1], table->record[0], table->s->reclength);
    DBUG_RETURN(error);
7354 7355
  }

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7356
  /* We need to retrieve all fields */
7357 7358
  /* TODO: Move this out from this function to main loop */
  table->use_all_columns();
unknown's avatar
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7359

7360 7361 7362
  if (table->s->keys > 0)
  {
    int error;
7363
    /* We have a key: search the table using the index */
7364
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
7365
      DBUG_RETURN(error);
7366

7367 7368 7369 7370 7371
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7372 7373
    DBUG_DUMP("table->record[0]", table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", table->record[1], table->s->reclength);
7374 7375
#endif

7376 7377 7378 7379 7380 7381
    /*
      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.
    */
7382 7383 7384
    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
    table->record[1][pos]= 0xFF;
unknown's avatar
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7385 7386
    if ((error= table->file->index_read(table->record[1], key, HA_WHOLE_KEY,
                                        HA_READ_KEY_EXACT)))
7387 7388
    {
      table->file->print_error(error, MYF(0));
7389
      table->file->ha_index_end();
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      DBUG_RETURN(error);
    }

7393 7394 7395 7396 7397
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7398 7399
    DBUG_DUMP("table->record[0]", table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", table->record[1], table->s->reclength);
7400
#endif
7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413
    /*
      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.
7414
    */
7415
    if (table->key_info->flags & HA_NOSAME)
7416 7417
    {
      table->file->ha_index_end();
7418
      DBUG_RETURN(0);
7419
    }
7420

7421
    while (record_compare(table))
7422 7423
    {
      int error;
7424

7425 7426 7427 7428 7429
      /*
        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.
7430 7431 7432

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
7433
      */
7434 7435 7436 7437 7438 7439
      if (table->s->null_bytes > 0)
      {
        table->record[1][table->s->null_bytes - 1]|=
          256U - (1U << table->s->last_null_bit_pos);
      }

7440
      if ((error= table->file->index_next(table->record[1])))
7441 7442
      {
	table->file->print_error(error, MYF(0));
7443
        table->file->ha_index_end();
7444 7445 7446
	DBUG_RETURN(error);
      }
    }
7447 7448 7449 7450 7451

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
7452 7453 7454 7455
  }
  else
  {
    int restart_count= 0; // Number of times scanning has restarted from top
7456 7457 7458 7459 7460 7461 7462
    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 */
7463 7464
    do
    {
7465
      error= table->file->rnd_next(table->record[1]);
7466

7467 7468
      DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
      DBUG_DUMP("record[1]", table->record[1], table->s->reclength);
7469

7470
      switch (error) {
7471 7472 7473 7474 7475 7476 7477 7478 7479 7480 7481
      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));
7482
        DBUG_PRINT("info", ("Record not found"));
7483
        table->file->ha_rnd_end();
7484 7485 7486
	DBUG_RETURN(error);
      }
    }
7487
    while (restart_count < 2 && record_compare(table));
7488

7489 7490 7491
    /*
      Have to restart the scan to be able to fetch the next row.
    */
7492
    DBUG_PRINT("info", ("Record %sfound", restart_count == 2 ? "not " : ""));
7493 7494
    table->file->ha_rnd_end();

7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512
    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
7513
  ,m_memory(NULL), m_key(NULL), m_after_image(NULL)
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#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),
7530
    m_memory(NULL), m_key(NULL), m_after_image(NULL)
7531 7532 7533 7534 7535 7536 7537 7538 7539 7540
#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);

7541
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
7542 7543 7544
      table->s->primary_key < MAX_KEY)
  {
    /*
7545
      We don't need to allocate any memory for m_after_image and
7546 7547 7548 7549 7550 7551 7552 7553 7554
      m_key since they are not used.
    */
    return 0;
  }

  int error= 0;

  if (table->s->keys > 0)
  {
7555 7556 7557 7558 7559 7560
    m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                       &m_after_image,
                                       (uint) table->s->reclength,
                                       &m_key,
                                       (uint) table->key_info->key_length,
                                       NullS);
7561 7562 7563
  }
  else
  {
7564 7565
    m_after_image= (uchar*) my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (uchar*)m_after_image;
7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578
    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
7579
  m_memory= NULL;
7580
  m_after_image= NULL;
7581
  m_key= NULL;
7582 7583 7584 7585

  return error;
}

7586
int Delete_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7587
                                          TABLE *table,
7588 7589
                                          uchar const *const row_start,
                                          uchar const **const row_end)
7590
{
7591
  DBUG_ASSERT(row_start && row_end);
7592 7593 7594 7595 7596 7597
  /*
    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);

7598 7599 7600 7601 7602 7603 7604
  if (int error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                            &m_master_reclength, table->read_set, DELETE_ROWS_EVENT))
  {
    thd->net.last_errno= error;
    return error;
  }

7605 7606 7607 7608 7609 7610 7611 7612 7613 7614 7615
  /*
    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);
  }

7616
  return 0;
7617 7618 7619 7620
}

int Delete_rows_log_event::do_exec_row(TABLE *table)
{
7621
  int error;
7622 7623
  DBUG_ASSERT(table != NULL);

7624 7625 7626 7627 7628 7629 7630 7631
  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]);
7632
  }
7633 7634 7635 7636 7637 7638 7639 7640 7641
  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)
{
7642
  Rows_log_event::print_helper(file, print_event_info, "Delete_rows");
7643 7644 7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655
}
#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,
7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671
                                             ulong tid,
                                             MY_BITMAP const *cols_bi,
                                             MY_BITMAP const *cols_ai,
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols_bi, is_transactional)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)

#endif
{
  init(cols_ai);
}

Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
                                             ulong tid,
                                             MY_BITMAP const *cols,
7672 7673 7674 7675 7676 7677
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)
#endif
{
7678 7679 7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692
  init(cols);
}

void Update_rows_log_event::init(MY_BITMAP const *cols)
{
  /* if bitmap_init fails, catched in is_valid() */
  if (likely(!bitmap_init(&m_cols_ai,
                          m_width <= sizeof(m_bitbuf_ai)*8 ? m_bitbuf_ai : NULL,
                          (m_width + 7) & ~7UL,
                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
  }
7693 7694 7695
}
#endif /* !defined(MYSQL_CLIENT) */

7696 7697 7698 7699 7700 7701 7702 7703 7704

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


7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731
/*
  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)
  {
7732 7733 7734 7735 7736 7737
    m_memory= (uchar*) my_multi_malloc(MYF(MY_WME),
                                       &m_after_image,
                                       (uint) table->s->reclength,
                                       &m_key,
                                       (uint) table->key_info->key_length,
                                       NullS);
7738 7739 7740
  }
  else
  {
7741 7742
    m_after_image= (uchar*) my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= m_after_image;
7743 7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757
    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));
7758
  m_memory= NULL;
7759
  m_after_image= NULL;
7760
  m_key= NULL;
7761 7762 7763 7764

  return error;
}

7765
int Update_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7766
                                          TABLE *table,
7767 7768
                                          uchar const *const row_start,
                                          uchar const **const row_end)
7769
{
7770 7771
  int error;
  DBUG_ASSERT(row_start && row_end);
7772 7773 7774 7775 7776 7777
  /*
    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);

7778 7779 7780 7781 7782 7783
  /*
    We need to perform some juggling below since unpack_row() always
    unpacks into table->record[0]. For more information, see the
    comments for unpack_row().
  */

7784
  /* record[0] is the before image for the update */
7785 7786 7787 7788 7789 7790 7791
  if ((error= unpack_row(rli, table, m_width, row_start, &m_cols, row_end,
                         &m_master_reclength, table->read_set, UPDATE_ROWS_EVENT)))
  {
    thd->net.last_errno= error;
    return error;
  }

7792
  store_record(table, record[1]);
7793
  uchar const *next_start = *row_end;
7794
  /* m_after_image is the after image for the update */
7795 7796 7797 7798 7799 7800 7801
  if ((error= unpack_row(rli, table, m_width, next_start, &m_cols_ai, row_end,
                         &m_master_reclength, table->write_set, UPDATE_ROWS_EVENT)))
  {
    thd->net.last_errno= error;
    return error;
  }

7802 7803
  bmove_align(m_after_image, table->record[0], table->s->reclength);
  restore_record(table, record[1]);
7804

7805 7806 7807 7808 7809
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7810 7811
  DBUG_DUMP("record[0]",     table->record[0], table->s->reclength);
  DBUG_DUMP("m_after_image", m_after_image, table->s->reclength);
7812
#endif
7813

7814 7815 7816 7817 7818 7819 7820 7821 7822 7823 7824
  /*
    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);
  }

7825
  return error;
7826 7827 7828 7829 7830 7831
}

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

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

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  /*
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    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
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    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.
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  */
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  bmove_align(table->record[0], m_after_image, table->s->reclength);
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  copy_extra_record_fields(table, m_master_reclength, m_width);
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  /*
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    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.
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  */
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  error= table->file->ha_update_row(table->record[1], table->record[0]);
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  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)
{
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  Rows_log_event::print_helper(file, print_event_info, "Update_rows");
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}
#endif

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Incident_log_event::Incident_log_event(const char *buf, uint event_len,
                                       const Format_description_log_event *descr_event)
  : Log_event(buf, descr_event)
{
  DBUG_ENTER("Incident_log_event::Incident_log_event");
  uint8 const common_header_len=
    descr_event->common_header_len;
  uint8 const post_header_len=
    descr_event->post_header_len[INCIDENT_EVENT-1];

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

  m_incident= static_cast<Incident>(uint2korr(buf + common_header_len));
  char const *ptr= buf + common_header_len + post_header_len;
  char const *const str_end= buf + event_len;
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  uint8 len= 0;                   // Assignment to keep compiler happy
  const char *str= NULL;          // Assignment to keep compiler happy
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  read_str(&ptr, str_end, &str, &len);
  m_message.str= const_cast<char*>(str);
  m_message.length= len;
  DBUG_PRINT("info", ("m_incident: %d", m_incident));
  DBUG_VOID_RETURN;
}


Incident_log_event::~Incident_log_event()
{
}


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

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

  DBUG_ASSERT(0 <= m_incident);
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  DBUG_ASSERT((size_t) m_incident <= sizeof(description)/sizeof(*description));
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  return description[m_incident];
}


#ifndef MYSQL_CLIENT
void Incident_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
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  size_t bytes;
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  if (m_message.length > 0)
    bytes= my_snprintf(buf, sizeof(buf), "#%d (%s)",
                       m_incident, description());
  else
    bytes= my_snprintf(buf, sizeof(buf), "#%d (%s): %s",
                       m_incident, description(), m_message.str);
  protocol->store(buf, bytes, &my_charset_bin);
}
#endif


#ifdef MYSQL_CLIENT
void
Incident_log_event::print(FILE *file,
                          PRINT_EVENT_INFO *print_event_info)
{
  if (print_event_info->short_form)
    return;

  Write_on_release_cache cache(&print_event_info->head_cache, file);
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# Incident: %s", description());
}
#endif

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int
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Incident_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
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  DBUG_ENTER("Incident_log_event::do_apply_event");
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  rli->report(ERROR_LEVEL, ER_SLAVE_INCIDENT,
              ER(ER_SLAVE_INCIDENT),
              description(),
              m_message.length > 0 ? m_message.str : "<none>");
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  DBUG_RETURN(1);
}
#endif

bool
Incident_log_event::write_data_header(IO_CACHE *file)
{
  DBUG_ENTER("Incident_log_event::write_data_header");
  DBUG_PRINT("enter", ("m_incident: %d", m_incident));
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  uchar buf[sizeof(int16)];
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  int2store(buf, (int16) m_incident);
  DBUG_RETURN(my_b_safe_write(file, buf, sizeof(buf)));
}

bool
Incident_log_event::write_data_body(IO_CACHE *file)
{
  DBUG_ENTER("Incident_log_event::write_data_body");
  DBUG_RETURN(write_str(file, m_message.str, m_message.length));
}