log_event.cc 256 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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    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->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0) |
               (suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0),
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	     using_trans),
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   data_buf(0), query(query_arg), catalog(thd_arg->catalog),
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   db(thd_arg->db), q_len((uint32) query_length),
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   thread_id(thd_arg->thread_id),
   /* save the original thread id; we already know the server id */
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   slave_proxy_id(thd_arg->variables.pseudo_thread_id),
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   flags2_inited(1), sql_mode_inited(1), charset_inited(1),
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   sql_mode(thd_arg->variables.sql_mode),
   auto_increment_increment(thd_arg->variables.auto_increment_increment),
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   auto_increment_offset(thd_arg->variables.auto_increment_offset),
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   lc_time_names_number(thd_arg->variables.lc_time_names->number),
   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)
1622
  {
1623 1624 1625 1626 1627
    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;
1628
  }
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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;)
1640
  {
1641 1642 1643 1644
    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));
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
      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;
    }
1660
    case Q_CATALOG_NZ_CODE:
1661
      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;
    }
1675 1676
    case Q_TIME_ZONE_CODE:
    {
1677
      get_str_len_and_pointer(&pos, &time_zone_str, &time_zone_len);
1678 1679
      break;
    }
1680 1681 1682 1683 1684 1685
    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)));
1698
      pos= (const uchar*) end;                         // Break loop
1699
    }
1700
  }
1701
  
1702
#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE)
1703 1704 1705 1706 1707 1708
  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))))
1709
#else
1710 1711 1712 1713
  if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 +
                                             time_zone_len + 1 +
                                             data_len + 1,
                                             MYF(MY_WME))))
1714
#endif
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      DBUG_VOID_RETURN;
1716
  if (catalog_len)                                  // If catalog is given
1717
  {
1718
    if (likely(catalog_nz)) // true except if event comes from 5.0.0|1|2|3.
1719
      copy_str_and_move(&catalog, &start, catalog_len);
1720 1721 1722
    else
    {
      memcpy(start, catalog, catalog_len+1); // copy end 0
1723
      catalog= (const char *)start;
1724 1725
      start+= catalog_len+1;
    }
1726
  }
1727
  if (time_zone_len)
1728
    copy_str_and_move(&time_zone_str, &start, time_zone_len);
1729

1730
  /* A 2nd variable part; this is common to all versions */ 
1731
  memcpy((char*) start, end, data_len);          // Copy db and query
1732
  start[data_len]= '\0';              // End query with \0 (For safetly)
1733 1734
  db= (char *)start;
  query= (char *)(start + db_len + 1);
1735 1736
  q_len= data_len - db_len -1;
  DBUG_VOID_RETURN;
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}

1739

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1740
/*
1741
  Query_log_event::print()
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*/
1743

1744
#ifdef MYSQL_CLIENT
1745
void Query_log_event::print_query_header(IO_CACHE* file,
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					 PRINT_EVENT_INFO* print_event_info)
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{
1748
  // TODO: print the catalog ??
1749
  char buff[40],*end;				// Enough for SET TIMESTAMP
1750 1751 1752
  bool different_db= 1;
  uint32 tmp;

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  if (!print_event_info->short_form)
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  {
1755 1756 1757 1758
    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)
1762
  {
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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);
1767
  }
1768

1769
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
1770
  end= strmov(end, print_event_info->delimiter);
1771
  *end++='\n';
1772
  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);
1776

1777
  /*
1778 1779 1780
    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).
1781 1782 1783 1784
  */
  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)) 
1786
      /* All bits which have changed */
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      tmp= (print_event_info->flags2) ^ flags2;
1788 1789
    else /* that's the first Query event we read */
    {
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      print_event_info->flags2_inited= 1;
1791 1792 1793 1794 1795 1796
      tmp= ~((uint32)0); /* all bits have changed */
    }

    if (unlikely(tmp)) /* some bits have changed */
    {
      bool need_comma= 0;
1797
      my_b_printf(file, "SET ");
1798 1799 1800 1801 1802 1803
      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;
1806 1807 1808 1809
    }
  }

  /*
1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
    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.
1820 1821 1822 1823
  */

  if (likely(sql_mode_inited))
  {
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    if (unlikely(!print_event_info->sql_mode_inited)) /* first Query event */
1825
    {
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      print_event_info->sql_mode_inited= 1;
1827
      /* force a difference to force write */
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      print_event_info->sql_mode= ~sql_mode;
1829
    }
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    if (unlikely(print_event_info->sql_mode != sql_mode))
1831
    {
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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;
1835 1836
    }
  }
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  if (print_event_info->auto_increment_increment != auto_increment_increment ||
      print_event_info->auto_increment_offset != auto_increment_offset)
1839
  {
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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;
1845 1846
  }

1847 1848
  /* TODO: print the catalog when we feature SET CATALOG */

1849 1850
  if (likely(charset_inited))
  {
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1851
    if (unlikely(!print_event_info->charset_inited)) /* first Query event */
1852
    {
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      print_event_info->charset_inited= 1;
      print_event_info->charset[0]= ~charset[0]; // force a difference to force write
1855
    }
1856
    if (unlikely(bcmp((uchar*) print_event_info->charset, (uchar*) charset, 6)))
1857
    {
1858 1859 1860
      CHARSET_INFO *cs_info= get_charset(uint2korr(charset), MYF(MY_WME));
      if (cs_info)
      {
1861
        /* for mysql client */
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        my_b_printf(file, "/*!\\C %s */%s\n",
                    cs_info->csname, print_event_info->delimiter);
1864
      }
1865 1866 1867 1868
      my_b_printf(file,"SET "
                  "@@session.character_set_client=%d,"
                  "@@session.collation_connection=%d,"
                  "@@session.collation_server=%d"
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                  "%s\n",
1870 1871
                  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);
1875 1876
    }
  }
1877 1878
  if (time_zone_len)
  {
1879 1880
    if (bcmp((uchar*) print_event_info->time_zone_str,
             (uchar*) time_zone_str, time_zone_len+1))
1881
    {
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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);
1885 1886
    }
  }
1887 1888
  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);
1891 1892
    print_event_info->lc_time_names_number= lc_time_names_number;
  }
1893 1894 1895
  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);
1898
    else
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1899 1900
      my_b_printf(file, "SET @@session.collation_database=DEFAULT%s\n",
                  print_event_info->delimiter);
1901 1902
    print_event_info->charset_database_number= charset_database_number;
  }
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}

1905

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1906
void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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{
1908 1909 1910
  Write_on_release_cache cache(&print_event_info->head_cache, file);

  print_query_header(&cache, print_event_info);
1911
  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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}
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1914
#endif /* MYSQL_CLIENT */
1915

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1916

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1917
/*
1918
  Query_log_event::do_apply_event()
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1919
*/
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1920

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1921
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
1922

1923
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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1924
{
1925
  return do_apply_event(rli, query, q_len);
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}


1929
int Query_log_event::do_apply_event(RELAY_LOG_INFO const *rli,
1930
                                      const char *query_arg, uint32 q_len_arg)
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{
1932
  LEX_STRING new_db;
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1933
  int expected_error,actual_error= 0;
1934
  /*
1935 1936 1937
    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
1938
    Query_log_event::do_apply_event()). Same for thd->db.  Thank
1939
    you.
1940
  */
1941
  thd->catalog= catalog_len ? (char *) catalog : (char *)"";
1942 1943 1944
  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' */
1945 1946
  thd->variables.auto_increment_increment= auto_increment_increment;
  thd->variables.auto_increment_offset=    auto_increment_offset;
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1947

1948
  /*
1949 1950 1951 1952 1953 1954 1955 1956
    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.
1957
  */
1958
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
1959 1960
  DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));

1961 1962
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
  const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
1963

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1964 1965 1966 1967 1968 1969 1970
  /*
    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
1971
            ::do_apply_event(), then the companion SET also have so
1972
            we don't need to reset_one_shot_variables().
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1973
  */
1974
  if (rpl_filter->db_ok(thd->db))
1975 1976
  {
    thd->set_time((time_t)when);
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    thd->query_length= q_len_arg;
    thd->query= (char*)query_arg;
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    VOID(pthread_mutex_lock(&LOCK_thread_count));
1980
    thd->query_id = next_query_id();
1981
    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));
1984

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    if (ignored_error_code((expected_error= error_code)) ||
1986
	!check_expected_error(thd,rli,expected_error))
1987 1988 1989
    {
      if (flags2_inited)
        /*
1990 1991
          all bits of thd->options which are 1 in OPTIONS_WRITTEN_TO_BIN_LOG
          must take their value from flags2.
1992
        */
1993
        thd->options= flags2|(thd->options & ~OPTIONS_WRITTEN_TO_BIN_LOG);
1994 1995
      /*
        else, we are in a 3.23/4.0 binlog; we previously received a
1996 1997
        Rotate_log_event which reset thd->options and sql_mode etc, so
        nothing to do.
1998 1999 2000 2001 2002
      */
      /*
        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
2003 2004 2005
        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).
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
      */
      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))))
          {
            /*
2024 2025 2026 2027
              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).
2028
            */
2029
            set_slave_thread_default_charset(thd, rli);
2030 2031 2032 2033 2034
            goto compare_errors;
          }
          thd->update_charset(); // for the charset change to take effect
        }
      }
2035 2036 2037
      if (time_zone_len)
      {
        String tmp(time_zone_str, time_zone_len, &my_charset_bin);
2038
        if (!(thd->variables.time_zone= my_tz_find(thd, &tmp)))
2039 2040 2041 2042 2043 2044
        {
          my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), tmp.c_ptr());
          thd->variables.time_zone= global_system_variables.time_zone;
          goto compare_errors;
        }
      }
2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057
      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;
2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072
      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;
      
2073
      /* Execute the query (note that we bypass dispatch_command()) */
2074 2075
      const char* found_semicolon= NULL;
      mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
2076 2077

    }
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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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      thd->killed= THD::NOT_KILLED;
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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++= ',';
      }
2843
      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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*/
2872

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bool Load_log_event::write_data_header(IO_CACHE* file)
2874
{
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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;
2883
}
2884

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/*
2887
  Load_log_event::write_data_body()
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*/
2889

2890
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,
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             thd_arg->thread_specific_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0,
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             using_trans),
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   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;
2962

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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()
2997

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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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}

3025

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/*
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  Load_log_event::copy_log_event()
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*/
3029

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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)
3033
{
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  DBUG_ENTER("Load_log_event::copy_log_event");
3035
  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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  if ((int) event_len < body_offset)
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3047
    DBUG_RETURN(1);
3048 3049 3050 3051
  /*
    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.
  */
3052 3053 3054
  if (!(field_lens= (uchar*)sql_ex.init((char*)buf + body_offset,
                                        buf_end,
                                        buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
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3055
    DBUG_RETURN(1);
3056
  
3057
  data_len = event_len - body_offset;
3058
  if (num_fields > data_len) // simple sanity check against corruption
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3059
    DBUG_RETURN(1);
3060
  for (uint i = 0; i < num_fields; i++)
3061
    field_block_len += (uint)field_lens[i] + 1;
3062

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3063 3064 3065 3066
  fields = (char*)field_lens + num_fields;
  table_name  = fields + field_block_len;
  db = table_name + table_name_len + 1;
  fname = db + db_len + 1;
3067 3068
  fname_len = strlen(fname);
  // null termination is accomplished by the caller doing buf[event_len]=0
3069

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3070
  DBUG_RETURN(0);
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3071 3072 3073
}


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3074
/*
3075
  Load_log_event::print()
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3076
*/
3077 3078

#ifdef MYSQL_CLIENT
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void Load_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
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3080
{
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  print(file, print_event_info, 0);
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3082 3083
}

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3084

3085
void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info,
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3086
			   bool commented)
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3087
{
3088 3089
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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3090
  DBUG_ENTER("Load_log_event::print");
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3091
  if (!print_event_info->short_form)
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3092
  {
3093 3094 3095
    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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3096 3097
  }

3098
  bool different_db= 1;
3099
  if (db)
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3100
  {
3101 3102 3103 3104 3105 3106
    /*
      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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3107
    if ((different_db= memcmp(print_event_info->db, db, db_len + 1)) &&
3108
        !commented)
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      memcpy(print_event_info->db, db, db_len + 1);
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3110
  }
3111
  
3112
  if (db && db[0] && different_db)
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    my_b_printf(&cache, "%suse %s%s\n", 
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3114
            commented ? "# " : "",
3115
            db, print_event_info->delimiter);
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3116

3117
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
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    my_b_printf(&cache,"%sSET @@session.pseudo_thread_id=%lu%s\n",
3119 3120
            commented ? "# " : "", (ulong)thread_id,
            print_event_info->delimiter);
3121
  my_b_printf(&cache, "%sLOAD DATA ",
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3122
              commented ? "# " : "");
3123
  if (check_fname_outside_temp_buf())
3124 3125
    my_b_printf(&cache, "LOCAL ");
  my_b_printf(&cache, "INFILE '%-*s' ", fname_len, fname);
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3126

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3127
  if (sql_ex.opt_flags & REPLACE_FLAG)
3128
    my_b_printf(&cache," REPLACE ");
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3129
  else if (sql_ex.opt_flags & IGNORE_FLAG)
3130
    my_b_printf(&cache," IGNORE ");
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3131
  
3132 3133 3134
  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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3135

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3136
  if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
3137 3138 3139
    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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3140
     
3141 3142
  my_b_printf(&cache, " ESCAPED BY ");
  pretty_print_str(&cache, sql_ex.escaped, sql_ex.escaped_len);
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3143
     
3144 3145
  my_b_printf(&cache," LINES TERMINATED BY ");
  pretty_print_str(&cache, sql_ex.line_term, sql_ex.line_term_len);
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3146

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3147

3148
  if (sql_ex.line_start)
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3149
  {
3150 3151
    my_b_printf(&cache," STARTING BY ");
    pretty_print_str(&cache, sql_ex.line_start, sql_ex.line_start_len);
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3152
  }
3153
  if ((long) skip_lines > 0)
3154
    my_b_printf(&cache, " IGNORE %ld LINES", (long) skip_lines);
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3155

3156 3157 3158 3159
  if (num_fields)
  {
    uint i;
    const char* field = fields;
3160
    my_b_printf(&cache, " (");
3161
    for (i = 0; i < num_fields; i++)
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3162
    {
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3163
      if (i)
3164 3165
	my_b_printf(&cache, ",");
      my_b_printf(&cache, field);
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3166
	  
3167
      field += field_lens[i]  + 1;
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3168
    }
3169
    my_b_printf(&cache, ")");
3170
  }
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3171

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3172
  my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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3173
  DBUG_VOID_RETURN;
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3174
}
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3175
#endif /* MYSQL_CLIENT */
3176

3177

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3178
/*
3179
  Load_log_event::set_fields()
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3180 3181 3182 3183 3184

  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

3187
#ifndef MYSQL_CLIENT
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3188
void Load_log_event::set_fields(const char* affected_db, 
3189 3190
				List<Item> &field_list,
                                Name_resolution_context *context)
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3191 3192
{
  uint i;
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3193
  const char* field = fields;
3194
  for (i= 0; i < num_fields; i++)
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3195
  {
3196 3197
    field_list.push_back(new Item_field(context,
                                        affected_db, table_name, field));
3198
    field+= field_lens[i]  + 1;
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  }
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3200
}
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3201
#endif /* !MYSQL_CLIENT */
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3202 3203


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3204
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
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3205 3206
/*
  Does the data loading job when executing a LOAD DATA on the slave
3207

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3208
  SYNOPSIS
3209
    Load_log_event::do_apply_event
3210 3211 3212
      net
      rli
      use_rli_only_for_errors	  - if set to 1, rli is provided to
3213
                                  Load_log_event::do_apply_event
3214 3215 3216 3217 3218 3219
                                  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
3220
                                  Execute_load_log_event::do_apply_event).
3221 3222 3223
                                  - if set to 0, rli is provided for
                                  full use, i.e. for error reports and
                                  position advancing.
3224

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3225 3226
  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
3227

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3228
  RETURN VALUE
3229
    0           Success
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3230 3231
    1    	Failure
*/
3232

3233
int Load_log_event::do_apply_event(NET* net, RELAY_LOG_INFO const *rli,
3234
                                   bool use_rli_only_for_errors)
3235
{
3236 3237 3238 3239
  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);
3240
  DBUG_ASSERT(thd->query == 0);
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3241
  thd->query_length= 0;                         // Should not be needed
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3242
  thd->query_error= 0;
3243
  clear_all_errors(thd, const_cast<RELAY_LOG_INFO*>(rli));
3244

3245
  /* see Query_log_event::do_apply_event() and BUG#13360 */
3246
  DBUG_ASSERT(!rli->m_table_map.count());
3247
  /*
3248
    Usually lex_start() is called by mysql_parse(), but we need it here
3249 3250
    as the present method does not call mysql_parse().
  */
3251 3252 3253
  lex_start(thd);
  mysql_reset_thd_for_next_command(thd);

unknown's avatar
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3254
  if (!use_rli_only_for_errors)
3255
  {
3256 3257
    /*
      Saved for InnoDB, see comment in
3258
      Query_log_event::do_apply_event()
3259
    */
3260
    const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
3261
    DBUG_PRINT("info", ("log_pos: %lu", (ulong) log_pos));
3262
  }
3263 3264
 
   /*
3265 3266 3267 3268 3269 3270 3271
    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
3272
    done by testing rules in Create_file_log_event::do_apply_event()
3273 3274 3275
    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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3276 3277 3278 3279 3280 3281 3282 3283


    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
3284
            ::do_apply_event(), then the companion SET also have so
3285
            we don't need to reset_one_shot_variables().
unknown's avatar
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3286
  */
3287
  if (rpl_filter->db_ok(thd->db))
3288
  {
3289 3290
    thd->set_time((time_t)when);
    VOID(pthread_mutex_lock(&LOCK_thread_count));
3291
    thd->query_id = next_query_id();
3292
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
3293 3294 3295 3296 3297 3298
    /*
      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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3299
    mysql_reset_errors(thd, 0);
3300 3301 3302

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
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3303
    tables.db= thd->strmake(thd->db, thd->db_length);
3304
    tables.alias = tables.table_name = (char*) table_name;
3305
    tables.lock_type = TL_WRITE;
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3306
    tables.updating= 1;
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3307

3308
    // the table will be opened in mysql_load    
3309
    if (rpl_filter->is_on() && !rpl_filter->tables_ok(thd->db, &tables))
3310 3311 3312 3313 3314 3315 3316 3317
    {
      // 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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3318
      char *end;
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3319
      enum enum_duplicates handle_dup;
3320
      bool ignore= 0;
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3321 3322
      char *load_data_query;

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3323
      /*
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3324 3325
        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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3326
      */
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3327
      if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1)))
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3328
      {
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3329 3330 3331 3332 3333
        /*
          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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3334
      }
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3335 3336 3337 3338 3339 3340 3341

      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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3342
      if (sql_ex.opt_flags & REPLACE_FLAG)
3343
      {
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3344
	handle_dup= DUP_REPLACE;
3345
      }
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3346
      else if (sql_ex.opt_flags & IGNORE_FLAG)
3347 3348 3349 3350
      {
        ignore= 1;
        handle_dup= DUP_ERROR;
      }
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3351
      else
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3352
      {
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3353
        /*
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3354
	  When replication is running fine, if it was DUP_ERROR on the
3355
          master then we could choose IGNORE here, because if DUP_ERROR
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3356
          suceeded on master, and data is identical on the master and slave,
3357
          then there should be no uniqueness errors on slave, so IGNORE is
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3358
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
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3359 3360 3361
          (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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3362 3363

          If reading from net (a 3.23 master), mysql_load() will change this
3364
          to IGNORE.
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3365 3366
        */
        handle_dup= DUP_ERROR;
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3367
      }
3368 3369 3370 3371 3372 3373 3374 3375 3376 3377
      /*
        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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3378

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3379
      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
3380 3381 3382 3383 3384
      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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3385 3386 3387 3388 3389
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;
3390 3391 3392 3393 3394 3395

      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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3396
      List<Item> field_list;
3397 3398
      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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3399
      thd->variables.pseudo_thread_id= thread_id;
3400 3401 3402 3403 3404 3405 3406 3407 3408
      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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3409
      /*
3410
        It is safe to use tmp_list twice because we are not going to
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3411 3412
        update it inside mysql_load().
      */
3413 3414
      List<Item> tmp_list;
      if (mysql_load(thd, &ex, &tables, field_list, tmp_list, tmp_list,
3415
                     handle_dup, ignore, net != 0))
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3416
        thd->query_error= 1;
3417
      if (thd->cuted_fields)
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3418
      {
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3419
	/* log_pos is the position of the LOAD event in the master log */
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3420 3421 3422 3423 3424 3425 3426
        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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3427
      }
3428 3429 3430
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
3431 3432
  }
  else
3433 3434 3435 3436 3437 3438 3439 3440 3441
  {
    /*
      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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3442 3443

error:
3444
  thd->net.vio = 0; 
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3445
  const char *remember_db= thd->db;
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3446
  VOID(pthread_mutex_lock(&LOCK_thread_count));
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3447
  thd->catalog= 0;
3448
  thd->set_db(NULL, 0);                   /* will free the current database */
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3449
  thd->query= 0;
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3450
  thd->query_length= 0;
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3451
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3452
  close_thread_tables(thd);
3453 3454 3455 3456

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

3457 3458
  if (thd->query_error)
  {
3459
    /* this err/sql_errno code is copy-paste from net_send_error() */
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3460 3461 3462 3463 3464 3465 3466 3467 3468
    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);       
    }
3469
    rli->report(ERROR_LEVEL, sql_errno,"\
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3470
Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'",
3471
                    err, (char*)table_name, print_slave_db_safe(remember_db));
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3472
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3473 3474
    return 1;
  }
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3475
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
3476

3477
  if (thd->is_fatal_error)
3478
  {
3479 3480 3481 3482 3483 3484 3485 3486 3487
    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);
3488 3489 3490
    return 1;
  }

3491
  return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); 
3492
}
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SCRUM  
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3493
#endif
3494 3495


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3496
/**************************************************************************
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3497
  Rotate_log_event methods
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3498
**************************************************************************/
3499

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3500
/*
3501
  Rotate_log_event::pack_info()
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3502
*/
3503

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3504
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3505
void Rotate_log_event::pack_info(Protocol *protocol)
3506
{
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3507
  char buf1[256], buf[22];
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3508
  String tmp(buf1, sizeof(buf1), log_cs);
3509
  tmp.length(0);
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3510
  tmp.append(new_log_ident, ident_len);
3511
  tmp.append(STRING_WITH_LEN(";pos="));
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3512 3513
  tmp.append(llstr(pos,buf));
  protocol->store(tmp.ptr(), tmp.length(), &my_charset_bin);
3514
}
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3515
#endif
3516

3517

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3518
/*
3519
  Rotate_log_event::print()
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3520
*/
3521 3522

#ifdef MYSQL_CLIENT
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3523
void Rotate_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3524
{
3525
  char buf[22];
3526 3527
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3528

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3529
  if (print_event_info->short_form)
3530
    return;
3531 3532
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tRotate to ");
3533
  if (new_log_ident)
3534
    my_b_write(&cache, (uchar*) new_log_ident, (uint)ident_len);
3535
  my_b_printf(&cache, "  pos: %s\n", llstr(pos, buf));
3536
}
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3537
#endif /* MYSQL_CLIENT */
3538 3539


3540

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3541
/*
3542
  Rotate_log_event::Rotate_log_event() (2 constructors)
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3543
*/
3544

3545 3546

#ifndef MYSQL_CLIENT
3547
Rotate_log_event::Rotate_log_event(const char* new_log_ident_arg,
3548 3549 3550 3551 3552 3553 3554 3555
                                   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];
3556
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(...,flags)");
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3557 3558
  DBUG_PRINT("enter",("new_log_ident: %s  pos: %s  flags: %lu", new_log_ident_arg,
                      llstr(pos_arg, buff), (ulong) flags));
3559 3560
#endif
  if (flags & DUP_NAME)
3561
    new_log_ident= my_strndup(new_log_ident_arg, ident_len, MYF(MY_WME));
3562 3563 3564 3565 3566
  DBUG_VOID_RETURN;
}
#endif


3567 3568
Rotate_log_event::Rotate_log_event(const char* buf, uint event_len,
                                   const Format_description_log_event* description_event)
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3569
  :Log_event(buf, description_event) ,new_log_ident(0), flags(DUP_NAME)
3570
{
3571
  DBUG_ENTER("Rotate_log_event::Rotate_log_event(char*,...)");
3572
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
3573 3574
  uint8 header_size= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[ROTATE_EVENT-1];
3575 3576
  uint ident_offset;
  if (event_len < header_size)
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3577
    DBUG_VOID_RETURN;
3578
  buf += header_size;
3579 3580 3581 3582
  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; 
3583
  set_if_smaller(ident_len,FN_REFLEN-1);
3584
  new_log_ident= my_strndup(buf + ident_offset, (uint) ident_len, MYF(MY_WME));
3585
  DBUG_PRINT("debug", ("new_log_ident: '%s'", new_log_ident));
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3586
  DBUG_VOID_RETURN;
3587
}
3588 3589


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3590
/*
3591
  Rotate_log_event::write()
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3592
*/
3593

3594
#ifndef MYSQL_CLIENT
3595
bool Rotate_log_event::write(IO_CACHE* file)
3596
{
3597
  char buf[ROTATE_HEADER_LEN];
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3598
  int8store(buf + R_POS_OFFSET, pos);
3599
  return (write_header(file, ROTATE_HEADER_LEN + ident_len) ||
3600 3601
          my_b_safe_write(file, (uchar*)buf, ROTATE_HEADER_LEN) ||
          my_b_safe_write(file, (uchar*)new_log_ident, (uint) ident_len));
3602
}
3603
#endif
3604

3605

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3606
/*
3607
  Rotate_log_event::do_apply_event()
3608

3609
  Got a rotate log event from the master
3610

3611 3612 3613
  IMPLEMENTATION
    This is mainly used so that we can later figure out the logname and
    position for the master.
3614

3615
    We can't rotate the slave's BINlog as this will cause infinitive rotations
3616
    in a A -> B -> A setup.
3617
    The NOTES below is a wrong comment which will disappear when 4.1 is merged.
3618 3619 3620

  RETURN VALUES
    0	ok
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3621
*/
3622

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3623
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3624
int Rotate_log_event::do_update_pos(RELAY_LOG_INFO *rli)
3625
{
3626
  DBUG_ENTER("Rotate_log_event::do_update_pos");
3627 3628 3629 3630
#ifndef DBUG_OFF
  char buf[32];
#endif

3631 3632
  DBUG_PRINT("info", ("server_id=%lu; ::server_id=%lu",
                      (ulong) this->server_id, (ulong) ::server_id));
3633 3634
  DBUG_PRINT("info", ("new_log_ident: %s", this->new_log_ident));
  DBUG_PRINT("info", ("pos: %s", llstr(this->pos, buf)));
3635 3636

  pthread_mutex_lock(&rli->data_lock);
3637
  rli->event_relay_log_pos= my_b_tell(rli->cur_log);
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3638
  /*
3639 3640 3641 3642
    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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3643 3644 3645 3646 3647
    BEGIN
    ...
    ROTATE (a fake one)
    ...
    COMMIT or ROLLBACK
3648 3649 3650 3651

    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
3652
    relay log, which shall not change the group positions.
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3653
  */
3654
  if ((server_id != ::server_id || rli->replicate_same_server_id) &&
3655
      !rli->is_in_group())
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3656
  {
3657 3658 3659 3660
    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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3661 3662
    memcpy(rli->group_master_log_name, new_log_ident, ident_len+1);
    rli->notify_group_master_log_name_update();
3663
    rli->group_master_log_pos= pos;
3664 3665 3666
    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();
3667
    rli->group_relay_log_pos= rli->event_relay_log_pos;
3668 3669
    DBUG_PRINT("info", ("new group_master_log_name: '%s'  "
                        "new group_master_log_pos: %lu",
3670
                        rli->group_master_log_name,
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3671
                        (ulong) rli->group_master_log_pos));
3672
    /*
3673 3674
      Reset thd->options and sql_mode etc, because this could be the signal of
      a master's downgrade from 5.0 to 4.0.
3675 3676 3677 3678 3679
      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);
3680
    set_slave_thread_default_charset(thd, rli);
3681
    thd->variables.sql_mode= global_system_variables.sql_mode;
3682 3683
    thd->variables.auto_increment_increment=
      thd->variables.auto_increment_offset= 1;
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3684
  }
3685 3686 3687
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
3688

3689
  DBUG_RETURN(0);
3690
}
3691

3692 3693

Log_event::enum_skip_reason
3694
Rotate_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3695
{
3696
  enum_skip_reason reason= Log_event::do_shall_skip(rli);
3697 3698

  switch (reason) {
3699
  case Log_event::EVENT_SKIP_NOT:
3700
  case Log_event::EVENT_SKIP_COUNT:
3701
    return Log_event::EVENT_SKIP_NOT;
3702

3703 3704
  case Log_event::EVENT_SKIP_IGNORE:
    return Log_event::EVENT_SKIP_IGNORE;
3705 3706
  }
  DBUG_ASSERT(0);
3707
  return Log_event::EVENT_SKIP_NOT;             // To keep compiler happy
3708 3709
}

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3710
#endif
3711 3712


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3713
/**************************************************************************
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3714
	Intvar_log_event methods
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3715
**************************************************************************/
3716

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3717
/*
3718
  Intvar_log_event::pack_info()
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3719
*/
3720

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3721
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3722
void Intvar_log_event::pack_info(Protocol *protocol)
3723
{
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3724 3725
  char buf[256], *pos;
  pos= strmake(buf, get_var_type_name(), sizeof(buf)-23);
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3726
  *pos++= '=';
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3727
  pos= longlong10_to_str(val, pos, -10);
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  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
3729
}
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3730
#endif
3731

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3732

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3733
/*
3734
  Intvar_log_event::Intvar_log_event()
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3735
*/
3736

3737 3738 3739
Intvar_log_event::Intvar_log_event(const char* buf,
                                   const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3740
{
3741 3742 3743
  buf+= description_event->common_header_len;
  type= buf[I_TYPE_OFFSET];
  val= uint8korr(buf+I_VAL_OFFSET);
3744 3745
}

3746

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3747
/*
3748
  Intvar_log_event::get_var_type_name()
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3749
*/
3750 3751

const char* Intvar_log_event::get_var_type_name()
3752
{
3753 3754 3755 3756 3757
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
3758 3759
}

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3760

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3761
/*
3762
  Intvar_log_event::write()
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3763
*/
3764

3765
#ifndef MYSQL_CLIENT
3766
bool Intvar_log_event::write(IO_CACHE* file)
3767
{
3768 3769
  uchar buf[9];
  buf[I_TYPE_OFFSET]= (uchar) type;
3770
  int8store(buf + I_VAL_OFFSET, val);
3771 3772
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3773
}
3774
#endif
3775

3776

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3777
/*
3778
  Intvar_log_event::print()
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3779
*/
3780 3781

#ifdef MYSQL_CLIENT
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3782
void Intvar_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3783
{
3784 3785 3786
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);
3787 3788
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);
3789

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3790
  if (!print_event_info->short_form)
3791
  {
3792 3793
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tIntvar\n");
3794
  }
3795

3796
  my_b_printf(&cache, "SET ");
3797 3798 3799 3800 3801 3802 3803
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
3804 3805 3806 3807
  case INVALID_INT_EVENT:
  default: // cannot happen
    msg="INVALID_INT";
    break;
3808
  }
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3809 3810
  my_b_printf(&cache, "%s=%s%s\n",
              msg, llstr(val,llbuff), print_event_info->delimiter);
3811
}
3812
#endif
3813

3814

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3815
/*
3816
  Intvar_log_event::do_apply_event()
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3817
*/
3818

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3819
#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
3820
int Intvar_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3821
{
3822 3823 3824 3825 3826 3827
  /*
    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);

3828 3829
  switch (type) {
  case LAST_INSERT_ID_EVENT:
3830 3831
    thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 1;
    thd->first_successful_insert_id_in_prev_stmt= val;
3832 3833
    break;
  case INSERT_ID_EVENT:
3834
    thd->force_one_auto_inc_interval(val);
3835 3836
    break;
  }
3837 3838 3839 3840 3841
  return 0;
}

int Intvar_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3842
  rli->inc_event_relay_log_pos();
3843
  return 0;
3844
}
3845 3846 3847


Log_event::enum_skip_reason
3848
Intvar_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3849 3850
{
  /*
3851 3852 3853 3854 3855 3856
    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.
3857 3858
  */
  if (rli->slave_skip_counter == 1)
3859
    return Log_event::EVENT_SKIP_IGNORE;
3860
  else
3861
    return Log_event::do_shall_skip(rli);
3862 3863
}

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3864
#endif
3865

3866

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3867
/**************************************************************************
3868
  Rand_log_event methods
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3869
**************************************************************************/
3870

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3871
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3872
void Rand_log_event::pack_info(Protocol *protocol)
3873
{
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3874 3875 3876 3877 3878
  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);
3879
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
3880
}
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3881
#endif
3882 3883


3884 3885 3886
Rand_log_event::Rand_log_event(const char* buf,
                               const Format_description_log_event* description_event)
  :Log_event(buf, description_event)
3887
{
3888 3889 3890
  buf+= description_event->common_header_len;
  seed1= uint8korr(buf+RAND_SEED1_OFFSET);
  seed2= uint8korr(buf+RAND_SEED2_OFFSET);
3891 3892
}

3893

3894
#ifndef MYSQL_CLIENT
3895
bool Rand_log_event::write(IO_CACHE* file)
3896
{
3897
  uchar buf[16];
3898 3899
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
3900 3901
  return (write_header(file, sizeof(buf)) ||
          my_b_safe_write(file, buf, sizeof(buf)));
3902
}
3903
#endif
3904

3905 3906

#ifdef MYSQL_CLIENT
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3907
void Rand_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
3908
{
3909 3910 3911
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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3912
  char llbuff[22],llbuff2[22];
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3913
  if (!print_event_info->short_form)
3914
  {
3915 3916
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tRand\n");
3917
  }
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3918 3919 3920
  my_b_printf(&cache, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s%s\n",
              llstr(seed1, llbuff),llstr(seed2, llbuff2),
              print_event_info->delimiter);
3921
}
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3922
#endif /* MYSQL_CLIENT */
3923

3924

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3925
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
3926
int Rand_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
3927
{
3928 3929 3930 3931 3932 3933
  /*
    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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3934 3935
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
3936 3937 3938 3939 3940
  return 0;
}

int Rand_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
3941
  rli->inc_event_relay_log_pos();
3942 3943
  return 0;
}
3944

3945 3946

Log_event::enum_skip_reason
3947
Rand_log_event::do_shall_skip(RELAY_LOG_INFO *rli)
3948 3949
{
  /*
3950 3951 3952 3953 3954 3955
    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.
3956 3957
  */
  if (rli->slave_skip_counter == 1)
3958
    return Log_event::EVENT_SKIP_IGNORE;
3959
  else
3960
    return Log_event::do_shall_skip(rli);
3961 3962
}

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3963
#endif /* !MYSQL_CLIENT */
3964

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3965

3966 3967 3968 3969 3970 3971 3972
/**************************************************************************
  Xid_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
3973 3974
  char buf[128], *pos;
  pos= strmov(buf, "COMMIT /* xid=");
3975
  pos= longlong10_to_str(xid, pos, 10);
3976
  pos= strmov(pos, " */");
3977 3978 3979 3980
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif

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3981 3982 3983 3984 3985 3986 3987 3988
/*
  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
*/
3989 3990 3991 3992

Xid_log_event::
Xid_log_event(const char* buf,
              const Format_description_log_event *description_event)
3993 3994 3995
  :Log_event(buf, description_event)
{
  buf+= description_event->common_header_len;
3996
  memcpy((char*) &xid, buf, sizeof(xid));
3997 3998 3999
}


4000
#ifndef MYSQL_CLIENT
4001 4002 4003
bool Xid_log_event::write(IO_CACHE* file)
{
  return write_header(file, sizeof(xid)) ||
4004
         my_b_safe_write(file, (uchar*) &xid, sizeof(xid));
4005
}
4006
#endif
4007 4008 4009


#ifdef MYSQL_CLIENT
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4010
void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4011
{
4012 4013 4014
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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4015
  if (!print_event_info->short_form)
4016
  {
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4017 4018 4019
    char buf[64];
    longlong10_to_str(xid, buf, 10);

4020 4021
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tXid = %s\n", buf);
4022
  }
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4023
  my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter);
4024 4025 4026 4027 4028
}
#endif /* MYSQL_CLIENT */


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4029
int Xid_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4030
{
4031
  /* For a slave Xid_log_event is COMMIT */
4032 4033
  general_log_print(thd, COM_QUERY,
                    "COMMIT /* implicit, from Xid_log_event */");
4034
  return end_trans(thd, COMMIT);
4035 4036 4037 4038
}
#endif /* !MYSQL_CLIENT */


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/**************************************************************************
4040
  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;
4047
  uint val_offset= 4 + name_len;
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  uint event_len= val_offset;

  if (is_null)
  {
4052 4053
    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);
4063 4064 4065
      if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER,
                                   MYF(MY_WME))))
        return;
4066 4067
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
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      break;
    case INT_RESULT:
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      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:
4088
      /* 15 is for 'COLLATE' and other chars */
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      buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15,
                             MYF(MY_WME));
4091
      CHARSET_INFO *cs;
4092 4093
      if (!buf)
        return;
4094 4095 4096 4097 4098 4099 4100
      if (!(cs= get_charset(charset_number, MYF(0))))
      {
        strmov(buf+val_offset, "???");
        event_len+= 3;
      }
      else
      {
4101 4102 4103
        char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS);
        p= str_to_hex(p, val, val_len);
        p= strxmov(p, " COLLATE ", cs->name, NullS);
4104 4105
        event_len= p-buf;
      }
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      break;
4107
    case ROW_RESULT:
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    default:
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      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
4114
  buf[1]= '`';
4115
  memcpy(buf+2, name, name_len);
4116 4117
  buf[2+name_len]= '`';
  buf[3+name_len]= '=';
4118
  protocol->store(buf, event_len, &my_charset_bin);
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  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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{
4129
  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;
4137
    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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  }
}


4153
#ifndef MYSQL_CLIENT
4154
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];
4159
  uchar buf2[max(8, DECIMAL_MAX_FIELD_SIZE + 2)], *pos= buf2;
4160
  uint buf1_length;
4161
  ulong event_length;
4162

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  int4store(buf, name_len);
4164 4165 4166 4167
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
4168
    val_len= 0;                                 // Length of 'pos'
4169 4170
  }    
  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;
4188
      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:
4193
      pos= (uchar*) val;
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      break;
4195
    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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  }
4203 4204 4205 4206 4207

  /* 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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4215

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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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{
4223 4224 4225
  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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  {
4228 4229
    print_header(&cache, print_event_info, FALSE);
    my_b_printf(&cache, "\tUser_var\n");
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  }

4232
  my_b_printf(&cache, "SET @`");
4233
  my_b_write(&cache, (uchar*) name, (uint) (name_len));
4234
  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];
4259 4260
      decimal_digit_t dec_buf[10];
      decimal_t dec;
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      dec.len= 10;
      dec.buf= dec_buf;

4264
      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:
4271
    {
4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285
      /*
        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.
      */
4286 4287 4288 4289
      char *hex_str;
      CHARSET_INFO *cs;

      if (!(hex_str= (char *)my_alloca(2*val_len+1+2))) // 2 hex digits / byte
4290
        break; // no error, as we are 'void'
4291
      str_to_hex(hex_str, val, val_len);
4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302
      /*
        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);
4304
      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);
4308
      my_afree(hex_str);
4309
    }
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      break;
4311
    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
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/*
4322
  User_var_log_event::do_apply_event()
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*/
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#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4326
int User_var_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
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{
  Item *it= 0;
4329 4330 4331
  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;
4335 4336
  double real_val;
  longlong int_val;
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4338 4339 4340 4341 4342 4343
  /*
    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);
4354
      val= (char*) &real_val;		// Pointer to value in native format
4355
      val_len= 8;
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      break;
    case INT_RESULT:
4358 4359 4360
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
4361
      val_len= 8;
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      break;
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    case DECIMAL_RESULT:
    {
4365
      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;
4374
    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);
4381 4382 4383 4384
  /*
    Item_func_set_user_var can't substitute something else on its place =>
    0 can be passed as last argument (reference on item)
  */
4385
  e.fix_fields(thd, 0);
4386 4387 4388 4389 4390
  /*
    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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4394 4395 4396 4397 4398
  return 0;
}

int User_var_log_event::do_update_pos(RELAY_LOG_INFO *rli)
{
4399
  rli->inc_event_relay_log_pos();
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  return 0;
}
4402

4403
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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/**************************************************************************
4423
  Slave_log_event methods
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**************************************************************************/
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#ifdef HAVE_REPLICATION
4427
#ifdef MYSQL_CLIENT
4428
void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info)
4429
{
4430 4431
  Write_on_release_cache cache(&print_event_info->head_cache, file_arg);

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  if (print_event_info->short_form)
4433
    return;
4434 4435
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n# %s", "Unknown event\n");
4436 4437
}
#endif  
4438

4439
#ifndef MYSQL_CLIENT
4440
void Slave_log_event::pack_info(Protocol *protocol)
4441
{
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  char buf[256+HOSTNAME_LENGTH], *pos;
4443 4444 4445 4446 4447 4448 4449
  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);
4451
  protocol->store(buf, pos-buf, &my_charset_bin);
4452
}
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#endif /* !MYSQL_CLIENT */
4454 4455 4456 4457


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
4458
				 RELAY_LOG_INFO* rli)
4459
  :Log_event(thd_arg, 0, 0) , mem_pool(0), master_host(0)
4460 4461 4462 4463
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
4464

4465 4466 4467 4468 4469
  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);
4470
  master_log_len = strlen(rli->group_master_log_name);
4471 4472 4473
  // 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))))
4474
  {
4475 4476 4477
    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;
4478
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
4479
    master_port = mi->port;
4480
    master_pos = rli->group_master_log_pos;
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    DBUG_PRINT("info", ("master_log: %s  pos: %lu", master_log,
4482
			(ulong) master_pos));
4483
  }
4484 4485 4486 4487 4488 4489
  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 */
4491 4492 4493 4494 4495 4496 4497 4498 4499


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)
4501
{
4502 4503
  Write_on_release_cache cache(&print_event_info->head_cache, file);

4504
  char llbuff[22];
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  if (print_event_info->short_form)
4506
    return;
4507 4508
  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",
4510 4511
	  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;
}


4521
#ifndef MYSQL_CLIENT
4522
bool Slave_log_event::write(IO_CACHE* file)
4523
{
4524
  ulong event_length= get_data_size();
4525 4526 4527
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
4528 4529

  return (write_header(file, event_length) ||
4530
          my_b_safe_write(file, (uchar*) mem_pool, event_length));
4531
}
4532
#endif
4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543


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)
4544
  {
4545 4546
    master_host = 0;
    return;
4547
  }
4548 4549
  master_log_len = strlen(master_log);
}
4550

4551

4552 4553 4554
/* 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)
4555
{
4556
  if (event_len < LOG_EVENT_HEADER_LEN)
4557
    return;
4558
  event_len -= LOG_EVENT_HEADER_LEN;
4559 4560 4561 4562 4563
  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);
4564 4565
}

4566

4567
#ifndef MYSQL_CLIENT
4568
int Slave_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4569 4570 4571
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
4572
  return 0;
4573
}
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4574
#endif /* !MYSQL_CLIENT */
4575 4576


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4577
/**************************************************************************
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4578
	Stop_log_event methods
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4579
**************************************************************************/
4580

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4581
/*
4582
  Stop_log_event::print()
4583
*/
4584 4585

#ifdef MYSQL_CLIENT
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4586
void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4587
{
4588 4589 4590
  Write_on_release_cache cache(&print_event_info->head_cache, file,
                               Write_on_release_cache::FLUSH_F);

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4591
  if (print_event_info->short_form)
4592 4593
    return;

4594 4595
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\tStop\n");
4596
}
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4597
#endif /* MYSQL_CLIENT */
4598

4599

4600
/*
4601
  Stop_log_event::do_apply_event()
4602 4603 4604 4605 4606 4607 4608 4609

  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
4610
  Start_log_event_v3::do_apply_event(), not here. Because if we come
4611
  here, the master was sane.
4612 4613
*/

4614
#ifndef MYSQL_CLIENT
4615
int Stop_log_event::do_update_pos(RELAY_LOG_INFO *rli)
4616
{
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4617 4618
  /*
    We do not want to update master_log pos because we get a rotate event
4619
    before stop, so by now group_master_log_name is set to the next log.
4620
    If we updated it, we will have incorrect master coordinates and this
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4621
    could give false triggers in MASTER_POS_WAIT() that we have reached
4622
    the target position when in fact we have not.
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4623
  */
4624 4625 4626 4627 4628 4629 4630
  if (thd->options & OPTION_BEGIN)
    rli->inc_event_relay_log_pos();
  else
  {
    rli->inc_group_relay_log_pos(0);
    flush_relay_log_info(rli);
  }
4631 4632
  return 0;
}
4633

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4634
#endif /* !MYSQL_CLIENT */
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4635
#endif /* HAVE_REPLICATION */
4636

4637

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4638
/**************************************************************************
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4639
	Create_file_log_event methods
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4640
**************************************************************************/
4641 4642

/*
4643
  Create_file_log_event ctor
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4644
*/
4645 4646

#ifndef MYSQL_CLIENT
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4647 4648 4649 4650
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,
4651
                      bool ignore,
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4652
		      char* block_arg, uint block_len_arg, bool using_trans)
4653
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup, ignore,
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4654
		  using_trans),
4655
   fake_base(0), block(block_arg), event_buf(0), block_len(block_len_arg),
4656
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
4657
{
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4658
  DBUG_ENTER("Create_file_log_event");
4659
  sql_ex.force_new_format();
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4660
  DBUG_VOID_RETURN;
4661
}
4662

4663

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4664
/*
4665
  Create_file_log_event::write_data_body()
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4666
*/
4667

4668
bool Create_file_log_event::write_data_body(IO_CACHE* file)
4669
{
4670 4671
  bool res;
  if ((res= Load_log_event::write_data_body(file)) || fake_base)
4672
    return res;
4673 4674
  return (my_b_safe_write(file, (uchar*) "", 1) ||
          my_b_safe_write(file, (uchar*) block, block_len));
4675 4676
}

4677

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4678
/*
4679
  Create_file_log_event::write_data_header()
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4680
*/
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4681

4682
bool Create_file_log_event::write_data_header(IO_CACHE* file)
4683
{
4684
  bool res;
4685
  uchar buf[CREATE_FILE_HEADER_LEN];
4686 4687
  if ((res= Load_log_event::write_data_header(file)) || fake_base)
    return res;
4688
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
4689
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN) != 0;
4690 4691 4692
}


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4693
/*
4694
  Create_file_log_event::write_base()
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4695
*/
4696

4697
bool Create_file_log_event::write_base(IO_CACHE* file)
4698
{
4699 4700 4701 4702
  bool res;
  fake_base= 1;                                 // pretend we are Load event
  res= write(file);
  fake_base= 0;
4703 4704 4705
  return res;
}

4706
#endif /* !MYSQL_CLIENT */
4707

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4708
/*
4709
  Create_file_log_event ctor
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4710
*/
4711

4712 4713 4714
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)
4715
{
4716 4717 4718 4719 4720
  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];
4721
  if (!(event_buf= (char*) my_memdup(buf, len, MYF(MY_WME))) ||
4722 4723 4724 4725 4726 4727 4728
      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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4729
    DBUG_VOID_RETURN;
4730
  if (description_event->binlog_version!=1)
4731
  {
4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748
    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);
4749 4750 4751 4752 4753 4754 4755 4756 4757
    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;
4758
  }
unknown's avatar
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4759
  DBUG_VOID_RETURN;
4760 4761
}

4762

unknown's avatar
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4763
/*
4764
  Create_file_log_event::print()
unknown's avatar
unknown committed
4765
*/
4766 4767

#ifdef MYSQL_CLIENT
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4768
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info,
unknown's avatar
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4769
				  bool enable_local)
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4770
{
4771 4772
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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4773
  if (print_event_info->short_form)
4774 4775
  {
    if (enable_local && check_fname_outside_temp_buf())
unknown's avatar
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4776
      Load_log_event::print(file, print_event_info);
4777
    return;
4778 4779 4780 4781
  }

  if (enable_local)
  {
unknown's avatar
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4782
    Load_log_event::print(file, print_event_info,
4783
			  !check_fname_outside_temp_buf());
unknown's avatar
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4784 4785 4786 4787
    /* 
       That one is for "file_id: etc" below: in mysqlbinlog we want the #, in
       SHOW BINLOG EVENTS we don't.
    */
4788
    my_b_printf(&cache, "#"); 
4789 4790
  }

4791
  my_b_printf(&cache, " file_id: %d  block_len: %d\n", file_id, block_len);
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4792
}
4793

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4794

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4795
void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
4796
{
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4797
  print(file, print_event_info, 0);
4798
}
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4799
#endif /* MYSQL_CLIENT */
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4800

4801

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4802
/*
4803
  Create_file_log_event::pack_info()
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4804
*/
4805

unknown's avatar
SCRUM  
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4806
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4807
void Create_file_log_event::pack_info(Protocol *protocol)
4808
{
4809 4810 4811
  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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4812
  pos= strmov(pos + db_len, ";table=");
4813
  memcpy(pos, table_name, table_name_len);
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4814
  pos= strmov(pos + table_name_len, ";file_id=");
4815 4816 4817
  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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4818
  protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
4819
}
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4820
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4821 4822


unknown's avatar
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4823
/*
4824
  Create_file_log_event::do_apply_event()
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4825
*/
4826

unknown's avatar
SCRUM  
unknown committed
4827
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4828
int Create_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
4829
{
unknown's avatar
unknown committed
4830 4831
  char proc_info[17+FN_REFLEN+10], *fname_buf;
  char *ext;
4832 4833 4834
  int fd = -1;
  IO_CACHE file;
  int error = 1;
unknown's avatar
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4835

4836
  bzero((char*)&file, sizeof(file));
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4837 4838
  fname_buf= strmov(proc_info, "Making temp file ");
  ext= slave_load_file_stem(fname_buf, file_id, server_id, ".info");
4839
  thd->proc_info= proc_info;
4840 4841 4842 4843
  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 ||
4844 4845 4846
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
4847 4848 4849
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
4850 4851 4852 4853
    goto err;
  }
  
  // a trick to avoid allocating another buffer
unknown's avatar
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4854 4855
  fname= fname_buf;
  fname_len= (uint) (strmov(ext, ".data") - fname);
4856 4857
  if (write_base(&file))
  {
unknown's avatar
unknown committed
4858
    strmov(ext, ".info"); // to have it right in the error message
4859 4860 4861
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not write to file '%s'",
                fname_buf);
4862 4863 4864 4865 4866 4867
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
4868 4869 4870 4871
  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)
4872
  {
4873 4874 4875
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: could not open file '%s'",
                fname_buf);
4876 4877
    goto err;
  }
4878
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
4879
  {
4880 4881 4882
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Create_file event: write to '%s' failed",
                fname_buf);
4883 4884
    goto err;
  }
4885 4886
  error=0;					// Everything is ok

4887 4888 4889 4890 4891
err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
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unknown committed
4892
  thd->proc_info= 0;
4893
  return error == 0;
4894
}
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unknown committed
4895
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
4896

4897

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4898
/**************************************************************************
unknown's avatar
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4899
	Append_block_log_event methods
unknown's avatar
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4900
**************************************************************************/
4901

unknown's avatar
unknown committed
4902
/*
4903
  Append_block_log_event ctor
unknown's avatar
unknown committed
4904
*/
4905 4906

#ifndef MYSQL_CLIENT  
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4907 4908
Append_block_log_event::Append_block_log_event(THD* thd_arg, const char* db_arg,
					       char* block_arg,
unknown's avatar
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4909 4910 4911
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
unknown's avatar
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4912
   block_len(block_len_arg), file_id(thd_arg->file_id), db(db_arg)
4913 4914
{
}
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4915
#endif
4916 4917


unknown's avatar
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4918
/*
4919
  Append_block_log_event ctor
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4920
*/
4921

4922 4923 4924
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)
4925
{
4926 4927 4928 4929 4930 4931
  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
4932
    DBUG_VOID_RETURN;
4933 4934 4935
  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
4936
  DBUG_VOID_RETURN;
4937 4938 4939
}


unknown's avatar
unknown committed
4940
/*
4941
  Append_block_log_event::write()
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unknown committed
4942
*/
4943

4944
#ifndef MYSQL_CLIENT
4945
bool Append_block_log_event::write(IO_CACHE* file)
4946
{
4947
  uchar buf[APPEND_BLOCK_HEADER_LEN];
4948
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
4949 4950
  return (write_header(file, APPEND_BLOCK_HEADER_LEN + block_len) ||
          my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
4951
	  my_b_safe_write(file, (uchar*) block, block_len));
4952
}
4953
#endif
4954 4955


unknown's avatar
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4956
/*
4957
  Append_block_log_event::print()
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4958
*/
4959 4960

#ifdef MYSQL_CLIENT  
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4961
void Append_block_log_event::print(FILE* file,
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4962
				   PRINT_EVENT_INFO* print_event_info)
4963
{
4964 4965
  Write_on_release_cache cache(&print_event_info->head_cache, file);

unknown's avatar
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4966
  if (print_event_info->short_form)
4967
    return;
4968 4969 4970
  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);
4971
}
unknown's avatar
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4972
#endif /* MYSQL_CLIENT */
4973 4974


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4975
/*
4976
  Append_block_log_event::pack_info()
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4977
*/
4978

unknown's avatar
SCRUM  
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4979
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
4980
void Append_block_log_event::pack_info(Protocol *protocol)
4981 4982 4983 4984 4985 4986
{
  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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4987
  protocol->store(buf, length, &my_charset_bin);
4988 4989 4990
}


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4991
/*
4992
  Append_block_log_event::get_create_or_append()
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4993 4994
*/

4995
int Append_block_log_event::get_create_or_append() const
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unknown committed
4996
{
4997
  return 0; /* append to the file, fail if not exists */
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4998 4999
}

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5000
/*
5001
  Append_block_log_event::do_apply_event()
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unknown committed
5002
*/
5003

5004
int Append_block_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5005
{
5006
  char proc_info[17+FN_REFLEN+10], *fname= proc_info+17;
5007
  int fd;
5008
  int error = 1;
5009
  DBUG_ENTER("Append_block_log_event::do_apply_event");
5010

unknown's avatar
unknown committed
5011 5012
  fname= strmov(proc_info, "Making temp file ");
  slave_load_file_stem(fname, file_id, server_id, ".data");
5013
  thd->proc_info= proc_info;
5014 5015 5016 5017 5018 5019 5020
  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)
    {
5021 5022 5023
      rli->report(ERROR_LEVEL, my_errno,
                  "Error in %s event: could not create file '%s'",
                  get_type_str(), fname);
5024 5025 5026
      goto err;
    }
  }
5027 5028
  else if ((fd = my_open(fname, O_WRONLY | O_APPEND | O_BINARY | O_NOFOLLOW,
                         MYF(MY_WME))) < 0)
5029
  {
5030 5031 5032
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: could not open file '%s'",
                get_type_str(), fname);
5033 5034
    goto err;
  }
5035
  if (my_write(fd, (uchar*) block, block_len, MYF(MY_WME+MY_NABP)))
5036
  {
5037 5038 5039
    rli->report(ERROR_LEVEL, my_errno,
                "Error in %s event: write to '%s' failed",
                get_type_str(), fname);
5040 5041 5042
    goto err;
  }
  error=0;
5043

5044 5045 5046
err:
  if (fd >= 0)
    my_close(fd, MYF(0));
5047
  thd->proc_info= 0;
5048
  DBUG_RETURN(error);
5049
}
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5050
#endif
5051 5052


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5053
/**************************************************************************
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5054
	Delete_file_log_event methods
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5055
**************************************************************************/
5056

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5057
/*
5058
  Delete_file_log_event ctor
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5059
*/
5060 5061

#ifndef MYSQL_CLIENT
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5062 5063 5064
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)
5065 5066
{
}
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5067
#endif
5068

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5069
/*
5070
  Delete_file_log_event ctor
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5071
*/
5072

5073 5074 5075
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)
5076
{
5077 5078 5079
  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))
5080
    return;
5081
  file_id= uint4korr(buf + common_header_len + DF_FILE_ID_OFFSET);
5082 5083 5084
}


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5085
/*
5086
  Delete_file_log_event::write()
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5087
*/
5088

5089
#ifndef MYSQL_CLIENT
5090
bool Delete_file_log_event::write(IO_CACHE* file)
5091
{
5092
 uchar buf[DELETE_FILE_HEADER_LEN];
5093
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
5094 5095
 return (write_header(file, sizeof(buf)) ||
         my_b_safe_write(file, buf, sizeof(buf)));
5096
}
5097
#endif
5098 5099


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5100
/*
5101
  Delete_file_log_event::print()
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5102
*/
5103 5104

#ifdef MYSQL_CLIENT  
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5105
void Delete_file_log_event::print(FILE* file,
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				  PRINT_EVENT_INFO* print_event_info)
5107
{
5108 5109
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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5110
  if (print_event_info->short_form)
5111
    return;
5112 5113
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Delete_file: file_id=%u\n", file_id);
5114
}
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#endif /* MYSQL_CLIENT */
5116

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5117
/*
5118
  Delete_file_log_event::pack_info()
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*/
5120

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5121
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5122
void Delete_file_log_event::pack_info(Protocol *protocol)
5123 5124 5125 5126
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5127
  protocol->store(buf, (int32) length, &my_charset_bin);
5128
}
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#endif
5130

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5131
/*
5132
  Delete_file_log_event::do_apply_event()
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5133
*/
5134

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5135
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5136
int Delete_file_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5137 5138
{
  char fname[FN_REFLEN+10];
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5139
  char *ext= slave_load_file_stem(fname, file_id, server_id, ".data");
5140
  (void) my_delete(fname, MYF(MY_WME));
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  strmov(ext, ".info");
5142
  (void) my_delete(fname, MYF(MY_WME));
5143
  return 0;
5144
}
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5145
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5146 5147


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5148
/**************************************************************************
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5149
	Execute_load_log_event methods
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**************************************************************************/
5151

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5152
/*
5153
  Execute_load_log_event ctor
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5154
*/
5155 5156

#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)
5160 5161
{
}
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#endif
5163 5164
  

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/*
5166
  Execute_load_log_event ctor
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5167
*/
5168

5169 5170 5171
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)
5172
{
5173 5174 5175
  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))
5176
    return;
5177
  file_id= uint4korr(buf + common_header_len + EL_FILE_ID_OFFSET);
5178 5179 5180
}


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5181
/*
5182
  Execute_load_log_event::write()
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5183
*/
5184

5185
#ifndef MYSQL_CLIENT
5186
bool Execute_load_log_event::write(IO_CACHE* file)
5187
{
5188
  uchar buf[EXEC_LOAD_HEADER_LEN];
5189
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
5190 5191
  return (write_header(file, sizeof(buf)) || 
          my_b_safe_write(file, buf, sizeof(buf)));
5192
}
5193
#endif
5194 5195


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5196
/*
5197
  Execute_load_log_event::print()
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5198
*/
5199 5200

#ifdef MYSQL_CLIENT  
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void Execute_load_log_event::print(FILE* file,
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5202
				   PRINT_EVENT_INFO* print_event_info)
5203
{
5204 5205
  Write_on_release_cache cache(&print_event_info->head_cache, file);

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5206
  if (print_event_info->short_form)
5207
    return;
5208 5209 5210
  print_header(&cache, print_event_info, FALSE);
  my_b_printf(&cache, "\n#Exec_load: file_id=%d\n",
              file_id);
5211
}
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#endif
5213

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5214
/*
5215
  Execute_load_log_event::pack_info()
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5216
*/
5217

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5218
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
5219
void Execute_load_log_event::pack_info(Protocol *protocol)
5220 5221 5222 5223
{
  char buf[64];
  uint length;
  length= (uint) my_sprintf(buf, (buf, ";file_id=%u", (uint) file_id));
5224
  protocol->store(buf, (int32) length, &my_charset_bin);
5225 5226 5227
}


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5228
/*
5229
  Execute_load_log_event::do_apply_event()
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5230
*/
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5231

5232
int Execute_load_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5233 5234
{
  char fname[FN_REFLEN+10];
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5235
  char *ext;
5236
  int fd;
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  int error= 1;
5238
  IO_CACHE file;
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  Load_log_event *lev= 0;
5240

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  ext= slave_load_file_stem(fname, file_id, server_id, ".info");
5242 5243
  if ((fd = my_open(fname, O_RDONLY | O_BINARY | O_NOFOLLOW,
                    MYF(MY_WME))) < 0 ||
5244 5245 5246
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
5247 5248 5249
    rli->report(ERROR_LEVEL, my_errno,
                "Error in Exec_load event: could not open file '%s'",
                fname);
5250 5251
    goto err;
  }
5252
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
5253 5254
                                                         (pthread_mutex_t*)0,
                                                         rli->relay_log.description_event_for_exec)) ||
5255
      lev->get_type_code() != NEW_LOAD_EVENT)
5256
  {
5257
    rli->report(ERROR_LEVEL, 0, "Error in Exec_load event: "
5258
                    "file '%s' appears corrupted", fname);
5259 5260
    goto err;
  }
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5261

5262
  lev->thd = thd;
5263
  /*
5264
    lev->do_apply_event should use rli only for errors i.e. should
5265 5266
    not advance rli's position.

5267
    lev->do_apply_event is the place where the table is loaded (it
5268
    calls mysql_load()).
5269
  */
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5270

5271 5272
  const_cast<RELAY_LOG_INFO*>(rli)->future_group_master_log_pos= log_pos;
  if (lev->do_apply_event(0,rli,1)) 
5273
  {
5274 5275 5276 5277 5278 5279 5280 5281
    /*
      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.
    */
5282
    char *tmp= my_strdup(rli->last_error().message, MYF(MY_WME));
5283 5284
    if (tmp)
    {
5285
      rli->report(ERROR_LEVEL, rli->last_error().number,
5286
                  "%s. Failed executing load from '%s'", tmp, fname);
5287 5288
      my_free(tmp,MYF(0));
    }
5289 5290
    goto err;
  }
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5291 5292 5293 5294 5295 5296 5297 5298 5299 5300
  /*
    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;
  }
5301
  (void) my_delete(fname, MYF(MY_WME));
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5302
  memcpy(ext, ".data", 6);
5303
  (void) my_delete(fname, MYF(MY_WME));
5304
  error = 0;
5305

5306 5307 5308
err:
  delete lev;
  if (fd >= 0)
5309
  {
5310
    my_close(fd, MYF(0));
5311 5312
    end_io_cache(&file);
  }
5313
  return error;
5314
}
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5315

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5316
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */
5317 5318


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5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343
/**************************************************************************
	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)
5344
int Begin_load_query_log_event::get_create_or_append() const
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5345
{
5346
  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;
}


5401
#ifndef MYSQL_CLIENT
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bool
Execute_load_query_log_event::write_post_header_for_derived(IO_CACHE* file)
{
5405
  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);
5409 5410
  *(buf + 4 + 4 + 4)= (uchar) dup_handling;
  return my_b_safe_write(file, buf, EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN);
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}
5412
#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)
{
5427 5428 5429
  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)
  {
5433
    my_b_write(&cache, (uchar*) query, fn_pos_start);
5434 5435 5436
    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)
5438 5439
      my_b_printf(&cache, " REPLACE");
    my_b_printf(&cache, " INTO");
5440
    my_b_write(&cache, (uchar*) query + fn_pos_end, q_len-fn_pos_end);
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5441
    my_b_printf(&cache, "%s\n", print_event_info->delimiter);
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  }
  else
  {
5445
    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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  }

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5449
  if (!print_event_info->short_form)
5450
    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;
5459
  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
5481
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;

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

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  DBUG_EXECUTE_IF("LOAD_DATA_INFILE_has_fatal_error", my_free(buf, MYF(0)); buf= NULL;);
5493

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  /* Replace filename and LOCAL keyword in query before executing it */
5495
  if (buf == NULL)
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  {
5497 5498
    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;
5505
  fname= (p= strmake(p, STRING_WITH_LEN(" INFILE \'")));
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  p= slave_load_file_stem(p, file_id, server_id, ".data");
  fname_end= p= strend(p);                      // Safer than p=p+5
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  *(p++)='\'';
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  switch (dup_handling) {
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  case LOAD_DUP_IGNORE:
5511
    p= strmake(p, STRING_WITH_LEN(" IGNORE"));
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    break;
  case LOAD_DUP_REPLACE:
5514
    p= strmake(p, STRING_WITH_LEN(" REPLACE"));
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    break;
  default:
    /* Ordinary load data */
    break;
  }
5520
  p= strmake(p, STRING_WITH_LEN(" INTO"));
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  p= strmake(p, query+fn_pos_end, q_len-fn_pos_end);

5523
  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;

5528 5529 5530 5531 5532 5533
  /*
    If there was an error the slave is going to stop, leave the
    file so that we can re-execute this event at START SLAVE.
  */
  if (!error)
    (void) my_delete(fname, MYF(MY_WME));
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  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
  return error;
}
#endif


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/**************************************************************************
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5542
	sql_ex_info methods
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**************************************************************************/
5544

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5545
/*
5546
  sql_ex_info::write_data()
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5547
*/
5548

5549
bool sql_ex_info::write_data(IO_CACHE* file)
5550 5551 5552
{
  if (new_format())
  {
5553 5554 5555 5556 5557
    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) ||
5558
	    my_b_safe_write(file,(uchar*) &opt_flags,1));
5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569
  }
  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;
5570
    return my_b_safe_write(file, (uchar*) &old_ex, sizeof(old_ex)) != 0;
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  }
}


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5575
/*
5576
  sql_ex_info::init()
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*/
5578

5579
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))
5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623
      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),
5634
    m_row_count(0),
5635 5636
    m_table(tbl_arg),
    m_table_id(tid),
5637 5638
    m_width(tbl_arg ? tbl_arg->s->fields : 1),
    m_rows_buf(0), m_rows_cur(0), m_rows_end(0),
5639 5640
    m_flags(0)
{
5641 5642
  /*
    We allow a special form of dummy event when the table, and cols
5643
    are null and the table id is ~0UL.  This is a temporary
5644 5645
    solution, to be able to terminate a started statement in the
    binary log: the extreneous events will be removed in the future.
5646
   */
5647 5648
  DBUG_ASSERT(tbl_arg && tbl_arg->s && tid != ~0UL ||
              !tbl_arg && !cols && tid == ~0UL);
5649 5650 5651 5652 5653 5654 5655 5656

  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,
5657
                          m_width,
5658
                          false)))
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  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
5662
    {
5663
      memcpy(m_cols.bitmap, cols->bitmap, no_bytes_in_map(cols));
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      create_last_word_mask(&m_cols);
    }
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  }
5667
  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;
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  uchar *ptr_after_width= (uchar*) ptr_width;
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  DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
5713
  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,
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                          m_width,
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                          false)))
  {
    DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
    memcpy(m_cols.bitmap, ptr_after_width, (m_width + 7) / 8);
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    create_last_word_mask(&m_cols);
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    ptr_after_width+= (m_width + 7) / 8;
5725
    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;
  }
5733

5734 5735 5736 5737 5738 5739 5740 5741 5742
  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,
5743
                            m_width,
5744 5745 5746 5747
                            false)))
    {
      DBUG_PRINT("debug", ("Reading from %p", ptr_after_width));
      memcpy(m_cols_ai.bitmap, ptr_after_width, (m_width + 7) / 8);
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      create_last_word_mask(&m_cols_ai);
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      ptr_after_width+= (m_width + 7) / 8;
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      DBUG_DUMP("m_cols_ai", (uchar*) m_cols_ai.bitmap,
                no_bytes_in_map(&m_cols_ai));
5752 5753 5754 5755 5756 5757 5758 5759 5760
    }
    else
    {
      // Needed because bitmap_init() does not set it to null on failure
      m_cols_ai.bitmap= 0;
      DBUG_VOID_RETURN;
    }
  }

5761
  const uchar* const ptr_rows_data= (const uchar*) ptr_after_width;
5762

5763
  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",
5765
                     m_table_id, m_flags, m_width, (ulong) data_size));
5766

5767
  m_rows_buf= (uchar*) my_malloc(data_size, MYF(MY_WME));
5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784
  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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}

5788 5789 5790 5791
int Rows_log_event::get_data_size()
{
  int const type_code= get_type_code();

5792 5793
  uchar buf[sizeof(m_width)+1];
  uchar *end= net_store_length(buf, (m_width + 7) / 8);
5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810

  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; 
}


5811
#ifndef MYSQL_CLIENT
5812
int Rows_log_event::do_add_row_data(uchar *row_data, size_t length)
5813 5814 5815 5816 5817 5818
{
  /*
    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
  */
5819
  DBUG_ENTER("Rows_log_event::do_add_row_data");
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5820 5821
  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
5827
  DBUG_DUMP("row_data", row_data, min(length, 32));
5828
#endif
5829 5830

  DBUG_ASSERT(m_rows_buf <= m_rows_cur);
5831
  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 */
5835
  if (static_cast<size_t>(m_rows_end - m_rows_cur) <= length)
5836
  {
5837
    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= 
5840
        block_size * ((cur_size + length + block_size - 1) / block_size);
5841

5842
    uchar* const new_buf= (uchar*)my_realloc((uchar*)m_rows_buf, (uint) new_alloc,
5843
                                           MYF(MY_ALLOW_ZERO_PTR|MY_WME));
5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860
    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;
  }

5861
  DBUG_ASSERT(m_rows_cur + length <= m_rows_end);
5862 5863
  memcpy(m_rows_cur, row_data, length);
  m_rows_cur+= length;
5864
  m_row_count++;
5865 5866 5867 5868 5869
  DBUG_RETURN(0);
}
#endif

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
5870
int Rows_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
5871
{
5872
  DBUG_ENTER("Rows_log_event::do_apply_event(st_relay_log_info*)");
5873
  int error= 0;
5874
  uchar const *row_start= m_rows_buf;
5875 5876

  /*
5877 5878 5879
    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
5880
    success.
5881
   */
5882
  if (m_table_id == ~0UL)
5883 5884 5885 5886 5887 5888 5889
  {
    /*
       This one is supposed to be set: just an extra check so that
       nothing strange has happened.
     */
    DBUG_ASSERT(get_flags(STMT_END_F));

5890
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5891
    close_thread_tables(thd);
5892 5893 5894
    thd->clear_error();
    DBUG_RETURN(0);
  }
5895 5896 5897

  /*
    'thd' has been set by exec_relay_log_event(), just before calling
5898
    do_apply_event(). We still check here to prevent future coding
5899
    errors.
5900 5901 5902 5903
  */
  DBUG_ASSERT(rli->sql_thd == thd);

  /*
5904 5905 5906 5907
    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.
5908
  */
5909
  if (!thd->lock)
5910
  {
5911 5912
    bool need_reopen= 1; /* To execute the first lap of the loop below */

5913
    /*
5914
      lock_tables() reads the contents of thd->lex, so they must be
5915
      initialized. Contrary to in
5916
      Table_map_log_event::do_apply_event() we don't call
5917
      mysql_init_query() as that may reset the binlog format.
5918
    */
5919
    lex_start(thd);
5920

5921 5922 5923
    while ((error= lock_tables(thd, rli->tables_to_lock,
                               rli->tables_to_lock_count, &need_reopen)))
    {
5924 5925
      if (!need_reopen)
      {
5926 5927 5928 5929 5930 5931 5932
        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;
5933 5934 5935 5936 5937
          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());
5938 5939 5940 5941
          thd->is_fatal_error= 1;
        }
        else
        {
5942 5943 5944
          rli->report(ERROR_LEVEL, error,
                      "Error in %s event: when locking tables",
                      get_type_str());
5945
        }
5946
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5947 5948
        DBUG_RETURN(error);
      }
5949

5950
      /*
5951
        So we need to reopen the tables.
5952

5953 5954
        We need to flush the pending RBR event, since it keeps a
        pointer to an open table.
5955

5956 5957 5958
        ALTERNATIVE SOLUTION (not implemented): Extract a pointer to
        the pending RBR event and reset the table pointer after the
        tables has been reopened.
5959

5960 5961
        NOTE: For this new scheme there should be no pending event:
        need to add code to assert that is the case.
5962 5963
       */
      thd->binlog_flush_pending_rows_event(false);
5964 5965
      TABLE_LIST *tables= rli->tables_to_lock;
      close_tables_for_reopen(thd, &tables);
5966

5967 5968
      uint tables_count= rli->tables_to_lock_count;
      if ((error= open_tables(thd, &tables, &tables_count, 0)))
5969 5970 5971 5972 5973 5974 5975 5976
      {
        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;
5977 5978 5979 5980
          rli->report(ERROR_LEVEL, actual_error,
                      "Error '%s' on reopening tables",
                      (actual_error ? thd->net.last_error :
                       "unexpected success or fatal error"));
5981 5982
          thd->query_error= 1;
        }
5983
        const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
5984
        DBUG_RETURN(error);
5985
      }
5986
    }
5987 5988 5989 5990 5991 5992 5993 5994 5995 5996

    /*
      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.
    */

    {
5997
      RPL_TABLE_LIST *ptr= rli->tables_to_lock;
5998 5999 6000 6001 6002 6003 6004
      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;
6005
          const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();
6006 6007 6008 6009 6010
          DBUG_RETURN(ERR_BAD_TABLE_DEF);
        }
      }
    }

6011
    /*
6012 6013
      ... and then we add all the tables to the table map and remove
      them from tables to lock.
6014 6015 6016

      We also invalidate the query cache for all the tables, since
      they will now be changed.
6017 6018 6019 6020 6021 6022 6023

      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.
6024
     */
6025
    for (TABLE_LIST *ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
6026
    {
6027
      const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.set_table(ptr->table_id, ptr->table);
6028
    }
6029 6030 6031
#ifdef HAVE_QUERY_CACHE
    query_cache.invalidate_locked_for_write(rli->tables_to_lock);
#endif
6032 6033
  }

6034
  TABLE* table= const_cast<RELAY_LOG_INFO*>(rli)->m_table_map.get_table(m_table_id);
6035 6036 6037 6038 6039

  if (table)
  {
    /*
      table == NULL means that this table should not be replicated
6040
      (this was set up by Table_map_log_event::do_apply_event()
6041
      which tested replicate-* rules).
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 6067 6068 6069

    /*
      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));

6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080
    /*
      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);

6081
    error= do_before_row_operations(table);
6082
    while (error == 0 && row_start < m_rows_end)
6083
    {
6084
      uchar const *row_end= NULL;
6085
      if ((error= do_prepare_row(thd, rli, table, row_start, &row_end)))
6086 6087
        break; // We should perform the after-row operation even in
               // the case of error
6088

6089
      DBUG_ASSERT(row_end != NULL); // cannot happen
6090
      DBUG_ASSERT(row_end <= m_rows_end);
6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108

      /* 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. %s",
                    get_type_str(),
                    thd->net.last_error ? thd->net.last_error : "");
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	thd->query_error= 1;
	break;
      }

      row_start= row_end;
    }
    DBUG_EXECUTE_IF("STOP_SLAVE_after_first_Rows_event",
6120
                    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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  }

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  /*
    We need to delay this clear until the table def is no longer needed.
    The table def is needed in unpack_row().
  */
  if (rli->tables_to_lock && get_flags(STMT_END_F))
    const_cast<RELAY_LOG_INFO*>(rli)->clear_tables_to_lock();

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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 "
6140
                "on table %s.%s. %s",
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                get_type_str(), table->s->db.str,
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                table->s->table_name.str,
                thd->net.last_error ? thd->net.last_error : "");
6144

6145
    /*
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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.
6155
    */
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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);
}

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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();
6256
    rli->cleanup_context(thd, 0);
6257 6258
    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);
6282
  }
6283
  else
6284
  {
6285
    rli->inc_event_relay_log_pos();
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  }

6288
  DBUG_RETURN(error);
6289
}
6290

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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;
6317
  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));
6320

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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));
6323

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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

6345
#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);
6353
  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

6382
/**************************************************************************
6383
	Table_map_log_event member functions and support functions
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**************************************************************************/

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/**
  @page How replication of field metadata works.
  
  When a table map is created, the master first calls 
6390
  Table_map_log_event::save_field_metadata() which calculates how many 
6391
  values will be in the field metadata. Only those fields that require the 
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  extra data are added. The method also loops through all of the fields in 
  the table calling the method Field::save_field_metadata() which returns the
  values for the field that will be saved in the metadata and replicated to
  the slave. Once all fields have been processed, the table map is written to
  the binlog adding the size of the field metadata and the field metadata to
  the end of the body of the table map.

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  When a table map is read on the slave, the field metadata is read from the 
  table map and passed to the table_def class constructor which saves the 
  field metadata from the table map into an array based on the type of the 
  field. Field metadata values not present (those fields that do not use extra 
  data) in the table map are initialized as zero (0). The array size is the 
  same as the columns for the table on the slave.

*/

/**
  Save the field metadata based on the real_type of the field.
  The metadata saved depends on the type of the field. Some fields
  store a single byte for pack_length() while others store two bytes
  for field_length (max length).
  
  @retval 0 Ok.

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

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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),
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    m_colcnt(tbl->s->fields), m_field_metadata(0),
    m_table_id(tid), m_null_bits(0), m_flags(flags)
6458
{
6459
  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() */
6478
  if ((m_memory= (uchar*) my_malloc(m_colcnt, MYF(MY_WME))))
6479
  {
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    m_coltype= reinterpret_cast<uchar*>(m_memory);
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    for (unsigned int i= 0 ; i < m_table->s->fields ; ++i)
      m_coltype[i]= m_table->field[i]->type();
  }
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  /*
    Calculate a bitmap for the results of maybe_null() for all columns.
    The bitmap is used to determine when there is a column from the master
    that is not on the slave and is null and thus not in the row data during
    replication.
  */
  uint num_null_bytes= (m_table->s->fields + 7) / 8;
  m_data_size+= num_null_bytes;
  m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                 &m_null_bits, num_null_bytes,
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                                 &m_field_metadata, (m_colcnt * 2),
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                                 NULL);
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  bzero(m_field_metadata, (m_colcnt * 2));

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

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

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

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

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

  : Log_event(buf, description_event),
#ifndef MYSQL_CLIENT
  m_table(NULL),
#endif
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  m_memory(NULL),
  m_field_metadata(0), m_field_metadata_size(0)
6537
{
6538
  unsigned int bytes_read= 0;
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  DBUG_ENTER("Table_map_log_event::Table_map_log_event(const char*,uint,...)");

  uint8 common_header_len= description_event->common_header_len;
  uint8 post_header_len= description_event->post_header_len[TABLE_MAP_EVENT-1];
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  DBUG_PRINT("info",("event_len: %u  common_header_len: %d  post_header_len: %d",
6544 6545
                     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);
6552
#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);
6567
    m_table_id= (ulong) uint6korr(post_start);
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    post_start+= TM_FLAGS_OFFSET;
  }

6571
  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 */
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  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 */
6583
  uchar const *const ptr_tbllen= ptr_dblen + m_dblen + 2;
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  m_tbllen= *(uchar*) ptr_tbllen;
6585 6586

  /* Length of table name + counter + terminating null */
6587
  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);
6590

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  DBUG_PRINT("info",("m_dblen: %lu  off: %ld  m_tbllen: %lu  off: %ld  m_colcnt: %lu  off: %ld",
6592 6593
                     (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);
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    ptr_after_colcnt= ptr_after_colcnt + m_colcnt;
    bytes_read= ptr_after_colcnt - (uchar *)buf;
    DBUG_PRINT("info", ("Bytes read: %d.\n", bytes_read));
    if (bytes_read < event_len)
    {
      m_field_metadata_size= net_field_length(&ptr_after_colcnt);
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      DBUG_ASSERT(m_field_metadata_size <= (m_colcnt * 2));
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      uint num_null_bytes= (m_colcnt + 7) / 8;
      m_meta_memory= (uchar *)my_multi_malloc(MYF(MY_WME),
                                     &m_null_bits, num_null_bytes,
                                     &m_field_metadata, m_field_metadata_size,
                                     NULL);
      memcpy(m_field_metadata, ptr_after_colcnt, m_field_metadata_size);
      ptr_after_colcnt= (uchar*)ptr_after_colcnt + m_field_metadata_size;
      memcpy(m_null_bits, ptr_after_colcnt, num_null_bytes);
    }
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  }

  DBUG_VOID_RETURN;
}
#endif

Table_map_log_event::~Table_map_log_event()
{
6634
  my_free(m_meta_memory, MYF(MY_ALLOW_ZERO_PTR));
6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649
  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)
6650
int Table_map_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
6651
{
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  RPL_TABLE_LIST *table_list;
  char *db_mem, *tname_mem;
  size_t dummy_len;
  void *memory;
6656
  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)))
6669
    DBUG_RETURN(HA_ERR_OUT_OF_MEM);
6670 6671 6672 6673 6674 6675 6676 6677 6678 6679

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

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  if (!rpl_filter->db_ok(table_list->db) ||
      (rpl_filter->is_on() && !rpl_filter->tables_ok("", table_list)))
  {
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    my_free(memory, MYF(MY_WME));
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  }
  else
6689
  {
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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.
    */
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    lex_start(thd);
    mysql_reset_thd_for_next_command(thd);
6697
    /*
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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.
6701
    */
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    if (!thd->current_stmt_binlog_row_based &&
        mysql_bin_log.is_open() && (thd->options & OPTION_BIN_LOG))
6704
    {
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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;
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    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)))
6730
    {
6731
      if (thd->query_error || thd->is_fatal_error)
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      {
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        /*
          Error reporting borrowed from Query_log_event with many excessive
          simplifications (we don't honour --slave-skip-errors)
        */
        uint actual_error= thd->net.last_errno;
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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);
6743
        thd->query_error= 1;
6744
      }
6745
      goto err;
6746 6747
    }

6748
    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.
6764
    */
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    new (&table_list->m_tabledef) table_def(m_coltype, m_colcnt, 
         m_field_metadata, m_field_metadata_size, m_null_bits);
6767
    table_list->m_tabledef_valid= TRUE;
6768 6769

    /*
6770
      We record in the slave's information that the table should be
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6771
      locked by linking the table into the list of tables to lock.
6772
    */
6773
    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++;
6776
    /* 'memory' is freed in clear_tables_to_lock */
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  }

6779
  DBUG_RETURN(error);
6780

6781
err:
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  my_free(memory, MYF(MY_WME));
6783 6784
  DBUG_RETURN(error);
}
6785

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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;
}

6805 6806 6807 6808 6809
#endif /* !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) */

#ifndef MYSQL_CLIENT
bool Table_map_log_event::write_data_header(IO_CACHE *file)
{
6810
  DBUG_ASSERT(m_table_id != ~0UL);
6811
  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 };
6833

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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));
6837

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  /*
    Store the size of the field metadata.
  */
  uchar mbuf[sizeof(m_field_metadata_size)];
6842
  uchar *const mbuf_end= net_store_length(mbuf, m_field_metadata_size);
6843

6844
  return (my_b_safe_write(file, dbuf,      sizeof(dbuf)) ||
6845
          my_b_safe_write(file, (const uchar*)m_dbnam,   m_dblen+1) ||
6846
          my_b_safe_write(file, tbuf,      sizeof(tbuf)) ||
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          my_b_safe_write(file, (const uchar*)m_tblnam,  m_tbllen+1) ||
          my_b_safe_write(file, cbuf, (size_t) (cbuf_end - cbuf)) ||
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          my_b_safe_write(file, m_coltype, m_colcnt) ||
          my_b_safe_write(file, mbuf, (size_t) (mbuf_end - mbuf)) ||
          my_b_safe_write(file, m_field_metadata, m_field_metadata_size),
          my_b_safe_write(file, m_null_bits, (m_colcnt + 7) / 8));
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 }
#endif

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

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

6863
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
6864 6865 6866
void Table_map_log_event::pack_info(Protocol *protocol)
{
    char buf[256];
6867
    size_t bytes= my_snprintf(buf, sizeof(buf),
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                                 "table_id: %lu (%s.%s)",
6869
                              m_table_id, m_dbnam, m_tblnam);
6870 6871
    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)
  {
6883 6884 6885 6886 6887
    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;
6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957
  /* 
     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);
6958 6959 6960 6961 6962
  /*
    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.
  */
6963
  table->file->ha_start_bulk_insert(0);
6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984
  /*
    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)
{
6985 6986 6987 6988 6989 6990 6991 6992 6993
  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
  */
6994
  if ((local_error= table->file->ha_end_bulk_insert()))
6995 6996 6997 6998
  {
    table->file->print_error(local_error, MYF(0));
  }
  return error? error : local_error;
6999 7000
}

7001
int Write_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7002
                                         TABLE *table,
7003 7004
                                         uchar const *const row_start,
                                         uchar const **const row_end)
7005 7006
{
  DBUG_ASSERT(table != NULL);
7007 7008
  DBUG_ASSERT(row_start && row_end);

7009 7010 7011 7012 7013 7014
  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;
  }
7015
  bitmap_copy(table->read_set, table->write_set);
7016
  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; }
  };

}


7062 7063 7064 7065 7066 7067 7068 7069 7070 7071
/*
  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,
7072
                         size_t master_reclength,
7073 7074
                         my_ptrdiff_t master_fields)
{
7075
  DBUG_ENTER("copy_extra_record_fields(table, master_reclen, master_fields)");
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7076
  DBUG_PRINT("info", ("Copying to 0x%lx "
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                      "from field %lu at offset %lu "
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                      "to field %d at offset %lu",
                      (long) table->record[0],
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                      (ulong) master_fields, (ulong) master_reclength,
7081
                      table->s->fields, table->s->reclength));
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  /*
    Copying the extra fields of the slave that does not exist on
    master into record[0] (which are basically the default values).
  */
7086 7087 7088 7089 7090

  if (table->s->fields < (uint) master_fields)
    DBUG_RETURN(0);

 DBUG_ASSERT(master_reclength <= table->s->reclength);
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  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;

7134
      case MYSQL_TYPE_BIT:
7135
        Field_bit *f= static_cast<Field_bit*>(*field_ptr);
7136 7137 7138 7139 7140 7141 7142
        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);
        }
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        break;
      }
    }
  }
7147
  DBUG_RETURN(0);                                     // All OK
7148 7149
}

7150 7151
#define DBUG_PRINT_BITSET(N,FRM,BS)                \
  do {                                             \
7152 7153 7154 7155 7156 7157 7158
    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)

7159

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/**
   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;
}


7186 7187 7188
/*
  Replace the provided record in the database.

7189 7190 7191 7192 7193 7194 7195 7196
  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.
7197

7198 7199
  RETURN VALUE
      Error code on failure, 0 on success.
7200

7201 7202 7203 7204
  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.
7205 7206
 */
static int
7207 7208 7209
replace_record(THD *thd, TABLE *table,
               ulong const master_reclength,
               uint const master_fields)
7210
{
7211
  DBUG_ENTER("replace_record");
7212 7213 7214 7215 7216 7217
  DBUG_ASSERT(table != NULL && thd != NULL);

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

7218
#ifndef DBUG_OFF
7219
  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
7220 7221 7222 7223
  DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);
  DBUG_PRINT_BITSET("debug", "read_set = %s", table->read_set);
#endif

7224 7225
  while ((error= table->file->ha_write_row(table->record[0])))
  {
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7226 7227 7228 7229 7230
    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);
    }
7231 7232
    if ((keynum= table->file->get_dup_key(error)) < 0)
    {
7233 7234 7235 7236 7237 7238
      table->file->print_error(error, MYF(0));
      /*
        We failed to retrieve the duplicate key
        - either because the error was not "duplicate key" error
        - or because the information which key is not available
      */
7239
      DBUG_RETURN(error);
7240 7241 7242 7243 7244 7245 7246 7247 7248 7249 7250 7251
    }

    /*
       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.
     */
7252
    if (table->file->ha_table_flags() & HA_DUPLICATE_POS)
7253
    {
7254
      error= table->file->rnd_pos(table->record[1], table->file->dup_ref);
7255
      if (error)
7256 7257
      {
        table->file->print_error(error, MYF(0));
7258
        DBUG_RETURN(error);
7259
      }
7260 7261 7262 7263 7264
    }
    else
    {
      if (table->file->extra(HA_EXTRA_FLUSH_CACHE))
      {
7265
        DBUG_RETURN(my_errno);
7266 7267 7268 7269 7270 7271
      }

      if (key.get() == NULL)
      {
        key.assign(static_cast<char*>(my_alloca(table->s->max_unique_length)));
        if (key.get() == NULL)
7272
          DBUG_RETURN(ENOMEM);
7273 7274
      }

7275
      key_copy((uchar*)key.get(), table->record[0], table->key_info + keynum, 0);
7276
      error= table->file->index_read_idx(table->record[1], keynum,
7277
                                         (const uchar*)key.get(),
7278
                                         HA_WHOLE_KEY,
7279 7280
                                         HA_READ_KEY_EXACT);
      if (error)
7281 7282
      {
        table->file->print_error(error, MYF(0));
7283
        DBUG_RETURN(error);
7284
      }
7285 7286 7287 7288 7289 7290 7291
    }

    /*
       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).

7292 7293 7294
       First we copy the columns into table->record[0] that are not
       present on the master from table->record[1], if there are any.
    */
7295
    copy_extra_record_fields(table, master_reclength, master_fields);
7296

7297
    /*
7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309 7310 7311 7312 7313 7314 7315 7316
       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]);
7317
      if (error && error != HA_ERR_RECORD_IS_THE_SAME)
7318
        table->file->print_error(error, MYF(0));
7319 7320
      else
        error= 0;
7321
      DBUG_RETURN(error);
7322 7323 7324 7325
    }
    else
    {
      if ((error= table->file->ha_delete_row(table->record[1])))
7326 7327
      {
        table->file->print_error(error, MYF(0));
7328
        DBUG_RETURN(error);
7329
      }
7330 7331 7332
      /* Will retry ha_write_row() with the offending row removed. */
    }
  }
7333

7334
  DBUG_RETURN(error);
7335 7336 7337 7338 7339
}

int Write_rows_log_event::do_exec_row(TABLE *table)
{
  DBUG_ASSERT(table != NULL);
7340
  int error= replace_record(thd, table, m_master_reclength, m_width);
7341 7342 7343 7344 7345 7346 7347
  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)
{
7348
  Rows_log_event::print_helper(file, print_event_info, "Write_rows");
7349 7350 7351 7352 7353 7354 7355 7356
}
#endif

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

#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
7357 7358 7359 7360 7361 7362
/*
  Compares table->record[0] and table->record[1]

  Returns TRUE if different.
*/
static bool record_compare(TABLE *table)
7363
{
7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376
  /*
    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;
7377
  uchar saved_x[2], saved_filler[2];
7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390

  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);
    }
  }

7391
  if (table->s->blob_fields + table->s->varchar_fields == 0)
7392 7393 7394 7395 7396
  {
    result= cmp_record(table,record[1]);
    goto record_compare_exit;
  }

7397 7398 7399 7400
  /* Compare null bits */
  if (memcmp(table->null_flags,
	     table->null_flags+table->s->rec_buff_length,
	     table->s->null_bytes))
7401 7402 7403 7404 7405
  {
    result= TRUE;				// Diff in NULL value
    goto record_compare_exit;
  }

7406 7407
  /* Compare updated fields */
  for (Field **ptr=table->field ; *ptr ; ptr++)
7408
  {
7409
    if ((*ptr)->cmp_binary_offset(table->s->rec_buff_length))
7410 7411 7412 7413
    {
      result= TRUE;
      goto record_compare_exit;
    }
7414
  }
7415 7416 7417 7418 7419 7420 7421 7422 7423 7424 7425 7426 7427 7428 7429

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];
    }
7430
  }
7431 7432

  return result;
7433 7434 7435 7436 7437
}


/*
  Find the row given by 'key', if the table has keys, or else use a table scan
7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457
  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.
7458
 */
7459

7460
static int find_and_fetch_row(TABLE *table, uchar *key)
7461
{
7462
  DBUG_ENTER("find_and_fetch_row(TABLE *table, uchar *key, uchar *record)");
7463 7464
  DBUG_PRINT("enter", ("table: 0x%lx, key: 0x%lx  record: 0x%lx",
		       (long) table, (long) key, (long) table->record[1]));
7465 7466 7467

  DBUG_ASSERT(table->in_use != NULL);

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

7470 7471
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
      table->s->primary_key < MAX_KEY)
7472 7473 7474 7475 7476 7477
  {
    /*
      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
7478
      the "cursor" (i.e., record[0] in this case) at the correct row.
7479 7480 7481 7482 7483 7484 7485 7486 7487 7488 7489

      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);

7490 7491
    */
    table->file->position(table->record[0]);
7492 7493 7494 7495 7496 7497 7498
    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);
7499 7500
  }

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7501
  /* We need to retrieve all fields */
7502 7503
  /* TODO: Move this out from this function to main loop */
  table->use_all_columns();
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7504

7505 7506 7507
  if (table->s->keys > 0)
  {
    int error;
7508
    /* We have a key: search the table using the index */
7509
    if (!table->file->inited && (error= table->file->ha_index_init(0, FALSE)))
7510
      DBUG_RETURN(error);
7511

7512 7513 7514 7515 7516
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7517 7518
    DBUG_DUMP("table->record[0]", table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", table->record[1], table->s->reclength);
7519 7520
#endif

7521 7522 7523 7524 7525 7526
    /*
      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.
    */
7527 7528 7529
    my_ptrdiff_t const pos=
      table->s->null_bytes > 0 ? table->s->null_bytes - 1 : 0;
    table->record[1][pos]= 0xFF;
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7530 7531
    if ((error= table->file->index_read(table->record[1], key, HA_WHOLE_KEY,
                                        HA_READ_KEY_EXACT)))
7532 7533
    {
      table->file->print_error(error, MYF(0));
7534
      table->file->ha_index_end();
7535 7536 7537
      DBUG_RETURN(error);
    }

7538 7539 7540 7541 7542
  /*
    Don't print debug messages when running valgrind since they can
    trigger false warnings.
   */
#ifndef HAVE_purify
7543 7544
    DBUG_DUMP("table->record[0]", table->record[0], table->s->reclength);
    DBUG_DUMP("table->record[1]", table->record[1], table->s->reclength);
7545
#endif
7546 7547 7548 7549 7550 7551 7552 7553 7554 7555 7556 7557 7558
    /*
      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.
7559
    */
7560
    if (table->key_info->flags & HA_NOSAME)
7561 7562
    {
      table->file->ha_index_end();
7563
      DBUG_RETURN(0);
7564
    }
7565

7566
    while (record_compare(table))
7567 7568
    {
      int error;
7569

7570 7571 7572 7573 7574
      /*
        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.
7575 7576 7577

        TODO[record format ndb]: Remove this code once NDB returns the
        correct record format.
7578
      */
7579 7580 7581 7582 7583 7584
      if (table->s->null_bytes > 0)
      {
        table->record[1][table->s->null_bytes - 1]|=
          256U - (1U << table->s->last_null_bit_pos);
      }

7585
      if ((error= table->file->index_next(table->record[1])))
7586 7587
      {
	table->file->print_error(error, MYF(0));
7588
        table->file->ha_index_end();
7589 7590 7591
	DBUG_RETURN(error);
      }
    }
7592 7593 7594 7595 7596

    /*
      Have to restart the scan to be able to fetch the next row.
    */
    table->file->ha_index_end();
7597 7598 7599 7600
  }
  else
  {
    int restart_count= 0; // Number of times scanning has restarted from top
7601 7602 7603 7604 7605 7606 7607
    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 */
7608 7609
    do
    {
7610
      error= table->file->rnd_next(table->record[1]);
7611

7612 7613
      DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
      DBUG_DUMP("record[1]", table->record[1], table->s->reclength);
7614

7615
      switch (error) {
7616 7617 7618 7619 7620 7621 7622 7623 7624 7625 7626
      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));
7627
        DBUG_PRINT("info", ("Record not found"));
7628
        table->file->ha_rnd_end();
7629 7630 7631
	DBUG_RETURN(error);
      }
    }
7632
    while (restart_count < 2 && record_compare(table));
7633

7634 7635 7636
    /*
      Have to restart the scan to be able to fetch the next row.
    */
7637
    DBUG_PRINT("info", ("Record %sfound", restart_count == 2 ? "not " : ""));
7638 7639
    table->file->ha_rnd_end();

7640 7641 7642 7643 7644 7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657
    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
7658
  ,m_memory(NULL), m_key(NULL), m_after_image(NULL)
7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674
#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),
7675
    m_memory(NULL), m_key(NULL), m_after_image(NULL)
7676 7677 7678 7679 7680 7681 7682 7683 7684 7685
#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);

7686
  if ((table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
7687 7688 7689
      table->s->primary_key < MAX_KEY)
  {
    /*
7690
      We don't need to allocate any memory for m_after_image and
7691 7692 7693 7694 7695 7696 7697 7698 7699
      m_key since they are not used.
    */
    return 0;
  }

  int error= 0;

  if (table->s->keys > 0)
  {
7700 7701 7702 7703 7704 7705
    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);
7706 7707 7708
  }
  else
  {
7709 7710
    m_after_image= (uchar*) my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= (uchar*)m_after_image;
7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723
    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
7724
  m_memory= NULL;
7725
  m_after_image= NULL;
7726
  m_key= NULL;
7727 7728 7729 7730

  return error;
}

7731
int Delete_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
7732
                                          TABLE *table,
7733 7734
                                          uchar const *const row_start,
                                          uchar const **const row_end)
7735
{
7736
  DBUG_ASSERT(row_start && row_end);
7737 7738 7739 7740 7741 7742 7743
  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;
  }

7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754
  /*
    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);
  }

7755
  return 0;
7756 7757 7758 7759
}

int Delete_rows_log_event::do_exec_row(TABLE *table)
{
7760
  int error;
7761 7762
  DBUG_ASSERT(table != NULL);

7763 7764 7765 7766 7767 7768 7769 7770
  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]);
7771
  }
7772 7773 7774 7775 7776 7777 7778 7779 7780
  return error;
}

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

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


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

/*
  Constructor used to build an event for writing to the binary log.
 */
#if !defined(MYSQL_CLIENT)
Update_rows_log_event::Update_rows_log_event(THD *thd_arg, TABLE *tbl_arg,
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                                             ulong tid,
                                             MY_BITMAP const *cols_bi,
                                             MY_BITMAP const *cols_ai,
                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols_bi, is_transactional)
#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,
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                                             bool is_transactional)
: Rows_log_event(thd_arg, tbl_arg, tid, cols, is_transactional)
#ifdef HAVE_REPLICATION
  , m_memory(NULL), m_key(NULL)
#endif
{
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  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,
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                          m_width,
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                          false)))
  {
    /* Cols can be zero if this is a dummy binrows event */
    if (likely(cols != NULL))
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    {
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      memcpy(m_cols_ai.bitmap, cols->bitmap, no_bytes_in_map(cols));
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      create_last_word_mask(&m_cols_ai);
    }
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  }
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}
#endif /* !defined(MYSQL_CLIENT) */

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


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/*
  Constructor used by slave to read the event from the binary log.
 */
#ifdef HAVE_REPLICATION
Update_rows_log_event::Update_rows_log_event(const char *buf, uint event_len,
                                             const
                                             Format_description_log_event
                                             *description_event)
#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)
  {
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    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);
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  }
  else
  {
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    m_after_image= (uchar*) my_malloc(table->s->reclength, MYF(MY_WME));
    m_memory= m_after_image;
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    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));
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  m_memory= NULL;
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  m_after_image= NULL;
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  m_key= NULL;
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  return error;
}

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int Update_rows_log_event::do_prepare_row(THD *thd, RELAY_LOG_INFO const *rli,
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                                          TABLE *table,
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                                          uchar const *const row_start,
                                          uchar const **const row_end)
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{
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  int error;
  DBUG_ASSERT(row_start && row_end);
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  /*
    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().
  */

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  /* record[0] is the before image for the update */
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  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;
  }

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  store_record(table, record[1]);
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  uchar const *next_start = *row_end;
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  /* m_after_image is the after image for the update */
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  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;
  }

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  bmove_align(m_after_image, table->record[0], table->s->reclength);
  restore_record(table, record[1]);
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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("record[0]",     table->record[0], table->s->reclength);
  DBUG_DUMP("m_after_image", m_after_image, table->s->reclength);
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#endif
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  /*
    If we will access rows using the random access method, m_key will
    be set to NULL, so we do not need to make a key copy in that case.
   */
  if (m_key)
  {
    KEY *const key_info= table->key_info;

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

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  return error;
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}

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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  if (error == HA_ERR_RECORD_IS_THE_SAME)
    error= 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));
}