mariadb/sql/log_event.cc

/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   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.
   
   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
#ifdef __GNUC__
#pragma implementation				// gcc: Class implementation
#endif
#include  "mysql_priv.h"
#include "slave.h"
#include <my_dir.h>
#endif /* MYSQL_CLIENT */

#define log_cs	&my_charset_latin1

/*
  my_b_safe_write()
*/

inline int my_b_safe_write(IO_CACHE* file, const byte *buf,
			   int len)
{
  /*
    Sasha: We are not writing this with the ? operator to avoid hitting
    a possible compiler bug. At least gcc 2.95 cannot deal with 
    several layers of ternary operators that evaluated comma(,) operator
    expressions inside - I do have a test case if somebody wants it
  */
  if (file->type == SEQ_READ_APPEND)
    return my_b_append(file, buf,len);
  return my_b_write(file, buf,len);
}


/*
  pretty_print_str()
*/

#ifdef MYSQL_CLIENT
static void pretty_print_str(FILE* file, char* str, int len)
{
  char* end = str + len;
  fputc('\'', file);
  while (str < end)
  {
    char c;
    switch ((c=*str++)) {
    case '\n': fprintf(file, "\\n"); break;
    case '\r': fprintf(file, "\\r"); break;
    case '\\': fprintf(file, "\\\\"); break;
    case '\b': fprintf(file, "\\b"); break;
    case '\t': fprintf(file, "\\t"); break;
    case '\'': fprintf(file, "\\'"); break;
    case 0   : fprintf(file, "\\0"); break;
    default:
      fputc(c, file);
      break;
    }
  }
  fputc('\'', file);
}
#endif // MYSQL_CLIENT


/*
  ignored_error_code()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
inline int ignored_error_code(int err_code)
{
  return use_slave_mask && bitmap_is_set(&slave_error_mask, err_code);
}
#endif

/*
  pretty_print_str()
*/

#ifndef MYSQL_CLIENT
static char* pretty_print_str(char* packet, char* str, int len)
{
  char* end = str + len;
  char* pos= packet;
  *pos++= '\'';
  while (str < end)
  {
    char c;
    switch ((c=*str++)) {
    case '\n': pos= strmov(pos, "\\n"); break;
    case '\r': pos= strmov(pos, "\\r"); break;
    case '\\': pos= strmov(pos, "\\\\"); break;
    case '\b': pos= strmov(pos, "\\b"); break;
    case '\t': pos= strmov(pos, "\\t"); break;
    case '\'': pos= strmov(pos, "\\'"); break;
    case 0   : pos= strmov(pos, "\\0"); break;
    default:
      *pos++= (char)c;
      break;
    }
  }
  *pos++= '\'';
  return pos;
}
#endif /* !MYSQL_CLIENT */


/*
  slave_load_file_stem()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
static inline char* slave_load_file_stem(char*buf, uint file_id,
					 int event_server_id)
{
  fn_format(buf,"SQL_LOAD-",slave_load_tmpdir,"",0); /* 4+32); */
  buf = strend(buf);
  buf = int10_to_str(::server_id, buf, 10);
  *buf++ = '-';
  buf = int10_to_str(event_server_id, buf, 10);
  *buf++ = '-';
  return int10_to_str(file_id, buf, 10);
}
#endif

/*
  cleanup_load_tmpdir()

  Delete all temporary files used for SQL_LOAD.

  TODO
  - When we get a 'server start' event, we should only remove
    the files associated with the server id that just started.
    Easily fixable by adding server_id as a prefix to the log files.
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
static void cleanup_load_tmpdir()
{
  MY_DIR *dirp;
  FILEINFO *file;
  uint i;
  if (!(dirp=my_dir(slave_load_tmpdir,MYF(MY_WME))))
    return;

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

  my_dirend(dirp);
}
#endif


/*
  write_str()
*/

static bool write_str(IO_CACHE *file, char *str, byte length)
{
  return (my_b_safe_write(file, &length, 1) ||
	  my_b_safe_write(file, (byte*) str, (int) length));
}


/*
  read_str()
*/

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


/**************************************************************************
	Log_event methods
**************************************************************************/

/*
  Log_event::get_type_str()
*/

const char* Log_event::get_type_str()
{
  switch(get_type_code()) {
  case START_EVENT:  return "Start";
  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";
  case NEW_LOAD_EVENT:   return "New_load";
  case SLAVE_EVENT:  return "Slave";
  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";
  case RAND_EVENT: return "RAND";
  case USER_VAR_EVENT: return "User var";
  default: /* impossible */ return "Unknown";
  }
}


/*
  Log_event::Log_event()
*/

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


Log_event::Log_event()
  :temp_buf(0), exec_time(0), cached_event_len(0), flags(0), cache_stmt(0),
   thd(0)
{
  server_id=	::server_id;
  when=		time(NULL);
  log_pos=	0;
}
#endif /* !MYSQL_CLIENT */


/*
  Log_event::Log_event()
*/

Log_event::Log_event(const char* buf, bool old_format)
  :temp_buf(0), cached_event_len(0), cache_stmt(0)
{
  when = uint4korr(buf);
  server_id = uint4korr(buf + SERVER_ID_OFFSET);
  if (old_format)
  {
    log_pos=0;
    flags=0;
  }
  else
  {
    log_pos = uint4korr(buf + LOG_POS_OFFSET);
    flags = uint2korr(buf + FLAGS_OFFSET);
  }
#ifndef MYSQL_CLIENT
  thd = 0;
#endif  
}

#ifndef MYSQL_CLIENT
#ifdef HAVE_REPLICATION

/*
  Log_event::exec_event()
*/

int Log_event::exec_event(struct st_relay_log_info* rli)
{
  /*
    rli is null when (as far as I (Guilhem) know)
    the caller is
    Load_log_event::exec_event *and* that one is called from
    Execute_load_log_event::exec_event. 
    In this case, we don't do anything here ;
    Execute_load_log_event::exec_event will call Log_event::exec_event
    again later with the proper rli.
    Strictly speaking, if we were sure that rli is null
    only in the case discussed above, 'if (rli)' is useless here.
    But as we are not 100% sure, keep it for now.
  */
  if (rli)  
  {
    /*
      If in a transaction, and if the slave supports transactions,
      just inc_event_relay_log_pos(). We only have to check for OPTION_BEGIN
      (not OPTION_NOT_AUTOCOMMIT) as transactions are logged
      with BEGIN/COMMIT, not with SET AUTOCOMMIT= .
      
      CAUTION: opt_using_transactions means
      innodb || bdb ; suppose the master supports InnoDB and BDB, 
      but the slave supports only BDB, problems
      will arise: 
      - suppose an InnoDB table is created on the master,
      - then it will be MyISAM on the slave
      - but as opt_using_transactions is true, the slave will believe he is
      transactional with the MyISAM table. And problems will come when one
      does START SLAVE; STOP SLAVE; START SLAVE; (the slave will resume at
      BEGIN whereas there has not been any rollback). This is the problem of
      using opt_using_transactions instead of a finer
      "does the slave support _the_transactional_handler_used_on_the_master_".
      
      More generally, we'll have problems when a query mixes a transactional
      handler and MyISAM and STOP SLAVE is issued in the middle of the
      "transaction". START SLAVE will resume at BEGIN while the MyISAM table
      has already been updated.
      
    */
    if ((thd->options & OPTION_BEGIN) && opt_using_transactions)
      rli->inc_event_relay_log_pos(get_event_len());
    else
    {
      rli->inc_group_relay_log_pos(get_event_len(),log_pos);
      flush_relay_log_info(rli);
    }
  }
  return 0;
}


/*
  Log_event::pack_info()
*/

void Log_event::pack_info(Protocol *protocol)
{
  protocol->store("", &my_charset_bin);
}


/*
  Log_event::net_send()

  Only called by SHOW BINLOG EVENTS
*/

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


/*
  Log_event::init_show_field_list()
*/

void Log_event::init_show_field_list(List<Item>* field_list)
{
  field_list->push_back(new Item_empty_string("Log_name", 20));
  field_list->push_back(new Item_return_int("Pos", 11,
					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Event_type", 20));
  field_list->push_back(new Item_return_int("Server_id", 10,
					    MYSQL_TYPE_LONG));
  field_list->push_back(new Item_return_int("Orig_log_pos", 11,
					    MYSQL_TYPE_LONGLONG));
  field_list->push_back(new Item_empty_string("Info", 20));
}

#endif // !MYSQL_CLIENT

/*
  Log_event::write()
*/

int Log_event::write(IO_CACHE* file)
{
  return (write_header(file) || write_data(file)) ? -1 : 0;
}


/*
  Log_event::write_header()
*/

int Log_event::write_header(IO_CACHE* file)
{
  char buf[LOG_EVENT_HEADER_LEN];
  char* pos = buf;
  int4store(pos, (ulong) when); // timestamp
  pos += 4;
  *pos++ = get_type_code(); // event type code
  int4store(pos, server_id);
  pos += 4;
  long tmp=get_data_size() + LOG_EVENT_HEADER_LEN;
  int4store(pos, tmp);
  pos += 4;
  int4store(pos, log_pos);
  pos += 4;
  int2store(pos, flags);
  pos += 2;
  return (my_b_safe_write(file, (byte*) buf, (uint) (pos - buf)));
}


/*
  Log_event::read_log_event()
*/

#ifndef MYSQL_CLIENT
int Log_event::read_log_event(IO_CACHE* file, String* packet,
			      pthread_mutex_t* log_lock)
{
  ulong data_len;
  int result=0;
  char buf[LOG_EVENT_HEADER_LEN];
  DBUG_ENTER("read_log_event");

  if (log_lock)
    pthread_mutex_lock(log_lock);
  if (my_b_read(file, (byte*) buf, sizeof(buf)))
  {
    /*
      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.
    */
    DBUG_PRINT("error",("file->error: %d", file->error));
    if (!file->error)
      result= LOG_READ_EOF;
    else
      result= (file->error > 0 ? LOG_READ_TRUNC : LOG_READ_IO);
    goto end;
  }
  data_len= uint4korr(buf + EVENT_LEN_OFFSET);
  if (data_len < LOG_EVENT_HEADER_LEN ||
      data_len > current_thd->variables.max_allowed_packet)
  {
    DBUG_PRINT("error",("data_len: %ld", data_len));
    result= ((data_len < LOG_EVENT_HEADER_LEN) ? LOG_READ_BOGUS :
	     LOG_READ_TOO_LARGE);
    goto end;
  }
  packet->append(buf, sizeof(buf));
  data_len-= LOG_EVENT_HEADER_LEN;
  if (data_len)
  {
    if (packet->append(file, data_len))
    {
      /*
	Here we should never hit EOF in a non-error condition.
	EOF means we are reading the event partially, which should
	never happen.
      */
      result= file->error >= 0 ? LOG_READ_TRUNC: LOG_READ_IO;
      /* Implicit goto end; */
    }
  }

end:
  if (log_lock)
    pthread_mutex_unlock(log_lock);
  DBUG_RETURN(result);
}
#endif // !MYSQL_CLIENT

#ifndef MYSQL_CLIENT
#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
#define max_allowed_packet current_thd->variables.max_allowed_packet
#else
#define UNLOCK_MUTEX
#define LOCK_MUTEX
#endif

/*
  Log_event::read_log_event()

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

#ifndef MYSQL_CLIENT
Log_event* Log_event::read_log_event(IO_CACHE* file,
				     pthread_mutex_t* log_lock,
				     bool old_format)
#else
Log_event* Log_event::read_log_event(IO_CACHE* file, bool old_format)
#endif  
{
  char head[LOG_EVENT_HEADER_LEN];
  uint header_size= old_format ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;

  LOCK_MUTEX;
  if (my_b_read(file, (byte *) head, header_size))
  {
    UNLOCK_MUTEX;
    return 0;
  }

  uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
  char *buf= 0;
  const char *error= 0;
  Log_event *res=  0;

  if (data_len > max_allowed_packet)
  {
    error = "Event too big";
    goto err;
  }

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

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

err:
  UNLOCK_MUTEX;
  if (error)
  {
    sql_print_error("Error in Log_event::read_log_event(): '%s', \
data_len=%d,event_type=%d",error,data_len,head[EVENT_TYPE_OFFSET]);
    my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
    /*
      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;
  }
  return res;
}


/*
  Log_event::read_log_event()
*/

Log_event* Log_event::read_log_event(const char* buf, int event_len,
				     const char **error, bool old_format)
{
  if (event_len < EVENT_LEN_OFFSET ||
      (uint) event_len != uint4korr(buf+EVENT_LEN_OFFSET))
  {
    *error="Sanity check failed";		// Needed to free buffer
    return NULL; // general sanity check - will fail on a partial read
  }
  
  Log_event* ev = NULL;
  
  switch(buf[EVENT_TYPE_OFFSET]) {
  case QUERY_EVENT:
    ev  = new Query_log_event(buf, event_len, old_format);
    break;
  case LOAD_EVENT:
    ev = new Load_log_event(buf, event_len, old_format);
    break;
  case NEW_LOAD_EVENT:
    ev = new Load_log_event(buf, event_len, old_format);
    break;
  case ROTATE_EVENT:
    ev = new Rotate_log_event(buf, event_len, old_format);
    break;
#ifdef HAVE_REPLICATION
  case SLAVE_EVENT:
    ev = new Slave_log_event(buf, event_len);
    break;
#endif /* HAVE_REPLICATION */
  case CREATE_FILE_EVENT:
    ev = new Create_file_log_event(buf, event_len, old_format);
    break;
  case APPEND_BLOCK_EVENT:
    ev = new Append_block_log_event(buf, event_len);
    break;
  case DELETE_FILE_EVENT:
    ev = new Delete_file_log_event(buf, event_len);
    break;
  case EXEC_LOAD_EVENT:
    ev = new Execute_load_log_event(buf, event_len);
    break;
  case START_EVENT:
    ev = new Start_log_event(buf, old_format);
    break;
#ifdef HAVE_REPLICATION
  case STOP_EVENT:
    ev = new Stop_log_event(buf, old_format);
    break;
#endif /* HAVE_REPLICATION */
  case INTVAR_EVENT:
    ev = new Intvar_log_event(buf, old_format);
    break;
  case RAND_EVENT:
    ev = new Rand_log_event(buf, old_format);
    break;
  case USER_VAR_EVENT:
    ev = new User_var_log_event(buf, old_format);
    break;
  default:
    break;
  }
  if (!ev || !ev->is_valid())
  {
    delete ev;
#ifdef MYSQL_CLIENT
    if (!force_opt)
    {
      *error= "Found invalid event in binary log";
      return 0;
    }
    ev= new Unknown_log_event(buf, old_format);
#else
    *error= "Found invalid event in binary log";
    return 0;
#endif
  }
  ev->cached_event_len = event_len;
  return ev;  
}

#ifdef MYSQL_CLIENT

/*
  Log_event::print_header()
*/

void Log_event::print_header(FILE* file)
{
  char llbuff[22];
  fputc('#', file);
  print_timestamp(file);
  fprintf(file, " server id %d  log_pos %s ", server_id,
	  llstr(log_pos,llbuff)); 
}

/*
  Log_event::print_timestamp()
*/

void Log_event::print_timestamp(FILE* file, time_t* ts)
{
  struct tm *res;
  if (!ts)
    ts = &when;
#ifdef MYSQL_SERVER				// This is always false
  struct tm tm_tmp;
  localtime_r(ts,(res= &tm_tmp));
#else
  res=localtime(ts);
#endif

  fprintf(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);
}

#endif // MYSQL_CLIENT

/*
  Log_event::set_log_pos()
*/

#ifndef MYSQL_CLIENT
void Log_event::set_log_pos(MYSQL_LOG* log)
{
  if (!log_pos)
    log_pos = my_b_tell(&log->log_file);
}
#endif // !MYSQL_CLIENT


/**************************************************************************
	Query_log_event methods
**************************************************************************/

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

/*
  Query_log_event::pack_info()
*/

void Query_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
  if (!(buf= my_malloc(9 + db_len + q_len, MYF(MY_WME))))
    return;
  pos= buf;    
  if (db && db_len)
  {
    pos= strmov(buf, "use `");
    memcpy(pos, db, db_len);
    pos+= db_len;
    pos= strmov(pos, "`; ");
  }
  if (query && q_len)
  {
    memcpy(pos, query, q_len);
    pos+= q_len;
  }
  protocol->store(buf, pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
#endif


/*
  Query_log_event::write()
*/

int Query_log_event::write(IO_CACHE* file)
{
  return query ? Log_event::write(file) : -1; 
}


/*
  Query_log_event::write_data()
*/

int Query_log_event::write_data(IO_CACHE* file)
{
  if (!query)
    return -1;
  
  char buf[QUERY_HEADER_LEN]; 
  int4store(buf + Q_THREAD_ID_OFFSET, thread_id);
  int4store(buf + Q_EXEC_TIME_OFFSET, exec_time);
  buf[Q_DB_LEN_OFFSET] = (char) db_len;
  int2store(buf + Q_ERR_CODE_OFFSET, error_code);

  return (my_b_safe_write(file, (byte*) buf, QUERY_HEADER_LEN) ||
	  my_b_safe_write(file, (db) ? (byte*) db : (byte*)"", db_len + 1) ||
	  my_b_safe_write(file, (byte*) query, q_len)) ? -1 : 0;
}


/*
  Query_log_event::Query_log_event()
*/

#ifndef MYSQL_CLIENT
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
				 ulong query_length, bool using_trans)
  :Log_event(thd_arg, !thd_arg->tmp_table_used ? 
	     0 : LOG_EVENT_THREAD_SPECIFIC_F, using_trans), 
   data_buf(0), query(query_arg),
   db(thd_arg->db), q_len((uint32) query_length),
  error_code(thd_arg->killed ? ER_SERVER_SHUTDOWN: thd_arg->net.last_errno),
  thread_id(thd_arg->thread_id)
{
  time_t end_time;
  time(&end_time);
  exec_time = (ulong) (end_time  - thd->start_time);
  db_len = (db) ? (uint32) strlen(db) : 0;
}
#endif /* MYSQL_CLIENT */

/*
  Query_log_event::Query_log_event()
*/

Query_log_event::Query_log_event(const char* buf, int event_len,
				 bool old_format)
  :Log_event(buf, old_format),data_buf(0), query(NULL), db(NULL)
{
  ulong data_len;
  if (old_format)
  {
    if ((uint)event_len < OLD_HEADER_LEN + QUERY_HEADER_LEN)
      return;				
    data_len = event_len - (QUERY_HEADER_LEN + OLD_HEADER_LEN);
    buf += OLD_HEADER_LEN;
  }
  else
  {
    if ((uint)event_len < QUERY_EVENT_OVERHEAD)
      return;				
    data_len = event_len - QUERY_EVENT_OVERHEAD;
    buf += LOG_EVENT_HEADER_LEN;
  }

  exec_time = uint4korr(buf + Q_EXEC_TIME_OFFSET);
  error_code = uint2korr(buf + Q_ERR_CODE_OFFSET);

  if (!(data_buf = (char*) my_malloc(data_len + 1, MYF(MY_WME))))
    return;

  memcpy(data_buf, buf + Q_DATA_OFFSET, data_len);
  thread_id = uint4korr(buf + Q_THREAD_ID_OFFSET);
  db = data_buf;
  db_len = (uint)buf[Q_DB_LEN_OFFSET];
  query=data_buf + db_len + 1;
  q_len = data_len - 1 - db_len;
  *((char*)query+q_len) = 0;
}


/*
  Query_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Query_log_event::print(FILE* file, bool short_form, char* last_db)
{
  char buff[40],*end;				// Enough for SET TIMESTAMP
  if (!short_form)
  {
    print_header(file);
    fprintf(file, "\tQuery\tthread_id=%lu\texec_time=%lu\terror_code=%d\n",
	    (ulong) thread_id, (ulong) exec_time, error_code);
  }

  bool same_db = 0;

  if (db && last_db)
  {
    if (!(same_db = !memcmp(last_db, db, db_len + 1)))
      memcpy(last_db, db, db_len + 1);
  }
  
  if (db && db[0] && !same_db)
    fprintf(file, "use %s;\n", db);
  end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10);
  *end++=';';
  *end++='\n';
  my_fwrite(file, (byte*) buff, (uint) (end-buff),MYF(MY_NABP | MY_WME));
  if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
    fprintf(file,"SET @@session.pseudo_thread_id=%lu;\n",(ulong)thread_id);
  my_fwrite(file, (byte*) query, q_len, MYF(MY_NABP | MY_WME));
  fprintf(file, ";\n");
}
#endif /* MYSQL_CLIENT */


/*
  Query_log_event::exec_event()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Query_log_event::exec_event(struct st_relay_log_info* rli)
{
  int expected_error,actual_error = 0;
  thd->db = rewrite_db((char*)db);

  /*
    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.
    So the position to store is event_master_log_pos + event_len
    since we must store the pos of the END of the current log event (COMMIT).
  */
  rli->event_len= get_event_len();

  if (db_ok(thd->db, replicate_do_db, replicate_ignore_db))
  {
    thd->set_time((time_t)when);
    thd->current_tablenr = 0;
    thd->query_length= q_len;
    VOID(pthread_mutex_lock(&LOCK_thread_count));
    thd->query = (char*)query;
    thd->query_id = query_id++;
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
    thd->query_error= 0;			// clear error
    thd->clear_error();
    
    thd->variables.pseudo_thread_id= thread_id;		// for temp tables
	
    /*
      Sanity check to make sure the master did not get a really bad
      error on the query.
    */
    if (ignored_error_code((expected_error = error_code)) ||
	!check_expected_error(thd,rli,expected_error))
    {
      mysql_log.write(thd,COM_QUERY,"%s",thd->query);
      DBUG_PRINT("query",("%s",thd->query));
      mysql_parse(thd, thd->query, q_len);

      DBUG_PRINT("info",("expected_error: %d  last_errno: %d",
			 expected_error, thd->net.last_errno));
      if ((expected_error != (actual_error= thd->net.last_errno)) &&
	  expected_error &&
	  !ignored_error_code(actual_error) &&
	  !ignored_error_code(expected_error))
      {
	const char* errmsg = "Slave: did not get the expected error\
 running query from master - expected: '%s' (%d), got '%s' (%d)"; 
	sql_print_error(errmsg, ER_SAFE(expected_error),
			expected_error,
			actual_error ? thd->net.last_error: "no error",
			actual_error);
	thd->query_error = 1;
      }
      else if (expected_error == actual_error ||
	       ignored_error_code(actual_error))
      {
	DBUG_PRINT("info",("error ignored"));
	thd->query_error = 0;
	*rli->last_slave_error = 0;
	rli->last_slave_errno = 0;
      }
    }
    else
    {
      // master could be inconsistent, abort and tell DBA to check/fix it
      VOID(pthread_mutex_lock(&LOCK_thread_count));
      thd->db = thd->query = 0;
      VOID(pthread_mutex_unlock(&LOCK_thread_count));
      //thd->variables.convert_set = 0;
      close_thread_tables(thd);
      free_root(&thd->mem_root,0);
      return 1;
    }
  }
  thd->db= 0;				// prevent db from being freed
  VOID(pthread_mutex_lock(&LOCK_thread_count));
  thd->query= 0;			// just to be sure
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
  // assume no convert for next query unless set explictly
  //thd->variables.convert_set = 0;
  close_thread_tables(thd);
      
  if (thd->query_error || thd->is_fatal_error)
  {
    slave_print_error(rli,actual_error, "error '%s' on query '%s'",
		      actual_error ? thd->net.last_error :
		      "unexpected success or fatal error", query);
    free_root(&thd->mem_root,0);
    return 1;
  }
  free_root(&thd->mem_root,0);
  return Log_event::exec_event(rli); 
}
#endif


/**************************************************************************
	Start_log_event methods
**************************************************************************/

/*
  Start_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Start_log_event::pack_info(Protocol *protocol)
{
  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: ");
  pos=int10_to_str(binlog_version, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
}
#endif


/*
  Start_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Start_log_event::print(FILE* file, bool short_form, char* last_db)
{
  if (short_form)
    return;

  print_header(file);
  fprintf(file, "\tStart: binlog v %d, server v %s created ", binlog_version,
	  server_version);
  print_timestamp(file, &created);
  fputc('\n', file);
  fflush(file);
}
#endif /* MYSQL_CLIENT */

/*
  Start_log_event::Start_log_event()
*/

Start_log_event::Start_log_event(const char* buf,
				 bool old_format)
  :Log_event(buf, old_format)
{
  buf += (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  binlog_version = uint2korr(buf+ST_BINLOG_VER_OFFSET);
  memcpy(server_version, buf+ST_SERVER_VER_OFFSET,
	 ST_SERVER_VER_LEN);
  created = uint4korr(buf+ST_CREATED_OFFSET);
}


/*
  Start_log_event::write_data()
*/

int Start_log_event::write_data(IO_CACHE* file)
{
  char buff[START_HEADER_LEN];
  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);
  return (my_b_safe_write(file, (byte*) buff, sizeof(buff)) ? -1 : 0);
}

/*
  Start_log_event::exec_event()

  The master started

  IMPLEMENTATION
    - 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 + locks that we got.
      However, we don't clean temporary tables if the master was 3.23
      (this is because a 3.23 master writes a Start_log_event at every
      binlog rotation; if we were not careful we would remove temp tables
      on the slave when FLUSH LOGS is issued on the master). 

  TODO
    - 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.
    - If we have an active transaction at this point, the master died
      in the middle while writing the transaction to the binary log.
      In this case we should stop the slave.
      Guilhem 2003-06: I don't think we should. As the binlog is written before
      the table changes are committed, rollback has occured on the master; we
      should rather rollback on the slave and go on. If we don't rollback, and
      the next query is not BEGIN, then it will be considered as part of the
      unfinished transaction, and so will be rolled back at next BEGIN, which is
      a bug.
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Start_log_event::exec_event(struct st_relay_log_info* rli)
{
  DBUG_ENTER("Start_log_event::exec_event");

  if (!rli->mi->old_format)
  {
    /*
      If the master died before writing the COMMIT to the binlog, rollback;
      otherwise it does not hurt to rollback.
    */
    ha_rollback(thd);
    /* 
       If 4.0 master, all temporary tables have been deleted on the master; 
       if 3.23 master, this is far from sure.
    */
    close_temporary_tables(thd);
    /*
      If we have old format, load_tmpdir is cleaned up by the I/O thread
    */
    cleanup_load_tmpdir();
  }
  DBUG_RETURN(Log_event::exec_event(rli));
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */

/**************************************************************************
	Load_log_event methods
**************************************************************************/

/*
  Load_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Load_log_event::pack_info(Protocol *protocol)
{
  char *buf, *pos;
  uint buf_len;

  buf_len= 
    5 + db_len + 3 +                        // "use DB; "
    18 + fname_len + 2 +                    // "LOAD DATA INFILE 'file''"
    9 +                                     // " REPLACE or IGNORE "
    11 + table_name_len +                   // "INTO TABLE table"
    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'"
    19 + sql_ex.line_start_len*4 + 2 +      // " LINES STARTING BY 'str'" 
    15 + 22 +                               // " IGNORE xxx  LINES" 
    3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)"

  buf= my_malloc(buf_len, MYF(MY_WME));
  if (!buf)
    return;
  pos= buf;
  if (db && db_len)
  {
    pos= strmov(pos, "use `");
    memcpy(pos, db, db_len);
    pos+= db_len;  
    pos= strmov(pos, "`; ");
  }

  pos= strmov(pos, "LOAD DATA INFILE '");
  memcpy(pos, fname, fname_len);
  pos+= fname_len;
  pos= strmov(pos, "' ");

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

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

  if (sql_ex.field_term_len)
  {
    pos= strmov(pos, " FIELDS TERMINATED BY ");
    pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len);
  }

  if (sql_ex.enclosed_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);
  }

  if (sql_ex.escaped_len)
  {
    pos= strmov(pos, " ESCAPED BY ");
    pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len);
  }

  bool line_lexem_added= false;
  if (sql_ex.line_term_len)
  {
    pos= strmov(pos, " LINES TERMINATED BY ");
    pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len);
    line_lexem_added= true;
  }

  if (sql_ex.line_start_len)
  {
    if (!line_lexem_added)
      pos= strmov(pos," LINES");
    pos= strmov(pos, " STARTING BY ");
    pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len);
  }

  if ((int)skip_lines > 0)
  {
    pos= strmov(pos, " IGNORE ");
    pos= longlong10_to_str((long) skip_lines, pos, 10);
    pos= strmov(pos," LINES ");    
  }

  if (num_fields)
  {
    uint i;
    const char* field = fields;
    pos= strmov(pos, " (");
    for (i = 0; i < num_fields; i++)
    {
      if (i)
        pos= strmov(pos, " ,");
      memcpy(pos, field, field_lens[i]);
      pos+= field_lens[i];
      field += field_lens[i]  + 1;
    }
    *pos++= ')';
  }

  protocol->store(buf, pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
#endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */


/*
  Load_log_event::write_data_header()
*/

int Load_log_event::write_data_header(IO_CACHE* file)
{
  char buf[LOAD_HEADER_LEN];
  int4store(buf + L_THREAD_ID_OFFSET, thread_id);
  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);
  return my_b_safe_write(file, (byte*)buf, LOAD_HEADER_LEN);
}


/*
  Load_log_event::write_data_body()
*/

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


/*
  Load_log_event::Load_log_event()
*/

#ifndef MYSQL_CLIENT
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,
			       enum enum_duplicates handle_dup,
			       bool using_trans)
  :Log_event(thd_arg, 0, using_trans), thread_id(thd_arg->thread_id),
   num_fields(0), fields(0), field_lens(0),field_block_len(0),
   table_name(table_name_arg ? table_name_arg : ""),
   db(db_arg), fname(ex->file_name)
{
  time_t end_time;
  time(&end_time);
  exec_time = (ulong) (end_time  - thd_arg->start_time);
  /* db can never be a zero pointer in 4.0 */
  db_len = (uint32) strlen(db);
  table_name_len = (uint32) strlen(table_name);
  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;
    
  if (ex->dumpfile)
    sql_ex.opt_flags|= DUMPFILE_FLAG;
  if (ex->opt_enclosed)
    sql_ex.opt_flags|= OPT_ENCLOSED_FLAG;

  sql_ex.empty_flags= 0;

  switch (handle_dup) {
  case DUP_IGNORE:
    sql_ex.opt_flags|= IGNORE_FLAG;
    break;
  case DUP_REPLACE:
    sql_ex.opt_flags|= REPLACE_FLAG;
    break;
  case DUP_UPDATE:				// Impossible here
  case DUP_ERROR:
    break;	
  }

  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;
    
  skip_lines = ex->skip_lines;

  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);
  }

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

/*
  Load_log_event::Load_log_event()

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

Load_log_event::Load_log_event(const char *buf, int event_len,
			       bool old_format)
  :Log_event(buf, old_format),num_fields(0),fields(0),
   field_lens(0),field_block_len(0),
   table_name(0),db(0),fname(0)
{
  if (!event_len) // derived class, will call copy_log_event() itself
    return;
  copy_log_event(buf, event_len, old_format);
}


/*
  Load_log_event::copy_log_event()
*/

int Load_log_event::copy_log_event(const char *buf, ulong event_len,
				   bool old_format)
{
  uint data_len;
  char* buf_end = (char*)buf + event_len;
  uint header_len= old_format ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  const char* data_head = buf + header_len;
  thread_id = uint4korr(data_head + L_THREAD_ID_OFFSET);
  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);
	  
  int body_offset = ((buf[EVENT_TYPE_OFFSET] == LOAD_EVENT) ?
		     LOAD_HEADER_LEN + header_len :
		     get_data_body_offset());
  
  if ((int) event_len < body_offset)
    return 1;
  /*
    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.
  */
  if (!(field_lens=(uchar*)sql_ex.init((char*)buf + body_offset,
		  buf_end,
		  buf[EVENT_TYPE_OFFSET] != LOAD_EVENT)))
    return 1;
  
  data_len = event_len - body_offset;
  if (num_fields > data_len) // simple sanity check against corruption
    return 1;
  for (uint i = 0; i < num_fields; i++)
    field_block_len += (uint)field_lens[i] + 1;

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


/*
  Load_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Load_log_event::print(FILE* file, bool short_form, char* last_db)
{
  if (!short_form)
  {
    print_header(file);
    fprintf(file, "\tQuery\tthread_id=%ld\texec_time=%ld\n",
	    thread_id, exec_time);
  }

  bool same_db = 0;
  if (db && last_db)
  {
    if (!(same_db = !memcmp(last_db, db, db_len + 1)))
      memcpy(last_db, db, db_len + 1);
  }
  
  if (db && db[0] && !same_db)
    fprintf(file, "use %s;\n", db);

  fprintf(file, "LOAD DATA ");
  if (check_fname_outside_temp_buf())
    fprintf(file, "LOCAL ");
  fprintf(file, "INFILE '%-*s' ", fname_len, fname);

  if (sql_ex.opt_flags & REPLACE_FLAG)
    fprintf(file," REPLACE ");
  else if (sql_ex.opt_flags & IGNORE_FLAG)
    fprintf(file," IGNORE ");
  
  fprintf(file, "INTO TABLE %s ", table_name);
  if (sql_ex.field_term)
  {
    fprintf(file, " FIELDS TERMINATED BY ");
    pretty_print_str(file, sql_ex.field_term, sql_ex.field_term_len);
  }

  if (sql_ex.enclosed)
  {
    if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG)
      fprintf(file," OPTIONALLY ");
    fprintf(file, " ENCLOSED BY ");
    pretty_print_str(file, sql_ex.enclosed, sql_ex.enclosed_len);
  }
     
  if (sql_ex.escaped)
  {
    fprintf(file, " ESCAPED BY ");
    pretty_print_str(file, sql_ex.escaped, sql_ex.escaped_len);
  }
     
  bool line_lexem_added= false;
  if (sql_ex.line_term)
  {
    fprintf(file," LINES TERMINATED BY ");
    pretty_print_str(file, sql_ex.line_term, sql_ex.line_term_len);
    line_lexem_added= true;
  }

  if (sql_ex.line_start)
  {
    if (!line_lexem_added)
      fprintf(file," LINES");
    fprintf(file," STARTING BY ");
    pretty_print_str(file, sql_ex.line_start, sql_ex.line_start_len);
  }
     
  if ((int)skip_lines > 0)
    fprintf(file, " IGNORE %ld LINES ", (long) skip_lines);

  if (num_fields)
  {
    uint i;
    const char* field = fields;
    fprintf(file, " (");
    for (i = 0; i < num_fields; i++)
    {
      if (i)
	fputc(',', file);
      fprintf(file, field);
	  
      field += field_lens[i]  + 1;
    }
    fputc(')', file);
  }

  fprintf(file, ";\n");
}
#endif /* MYSQL_CLIENT */


/*
  Load_log_event::set_fields()
*/

#ifndef MYSQL_CLIENT
void Load_log_event::set_fields(List<Item> &field_list)
{
  uint i;
  const char* field = fields;
  for (i= 0; i < num_fields; i++)
  {
    field_list.push_back(new Item_field(db, table_name, field));	  
    field+= field_lens[i]  + 1;
  }
}
#endif // !MYSQL_CLIENT

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

  SYNOPSIS
    Load_log_event::exec_event
      net  
      rli                             
      use_rli_only_for_errors	  - if set to 1, rli is provided to 
                                  Load_log_event::exec_event only for this 
				  function to have RPL_LOG_NAME and 
				  rli->last_slave_error, both being used by 
				  error reports. rli's position advancing
				  is skipped (done by the caller which is
				  Execute_load_log_event::exec_event).
				  - if set to 0, rli is provided for full use,
				  i.e. for error reports and position
				  advancing.

  DESCRIPTION
    Does the data loading job when executing a LOAD DATA on the slave
 
  RETURN VALUE
    0           Success                                                 
    1    	Failure
*/

int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli, 
			       bool use_rli_only_for_errors)
{
  thd->db = rewrite_db((char*)db);
  DBUG_ASSERT(thd->query == 0);
  thd->query = 0;				// Should not be needed
  thd->query_error = 0;
	    
  if (db_ok(thd->db, replicate_do_db, replicate_ignore_db))
  {
    thd->set_time((time_t)when);
    thd->current_tablenr = 0;
    VOID(pthread_mutex_lock(&LOCK_thread_count));
    thd->query_id = query_id++;
    VOID(pthread_mutex_unlock(&LOCK_thread_count));

    TABLE_LIST tables;
    bzero((char*) &tables,sizeof(tables));
    tables.db = thd->db;
    tables.alias = tables.real_name = (char*)table_name;
    tables.lock_type = TL_WRITE;
    tables.updating= 1;
    // the table will be opened in mysql_load    
    if (table_rules_on && !tables_ok(thd, &tables))
    {
      // 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];
      enum enum_duplicates handle_dup;
      if (sql_ex.opt_flags & REPLACE_FLAG)
	handle_dup= DUP_REPLACE;
      else if (sql_ex.opt_flags & IGNORE_FLAG)
        handle_dup= DUP_IGNORE;
      else
        /*
          Note that when replication is running fine, if it was DUP_ERROR on the 
          master then we could choose DUP_IGNORE here, because if DUP_ERROR
          suceeded on master, and data is identical on the master and slave,
          then there should be no uniqueness errors on slave, so DUP_IGNORE is
          the same as DUP_ERROR. But in the unlikely case of uniqueness errors
          (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.

          If reading from net (a 3.23 master), mysql_load() will change this
          to DUP_IGNORE.
        */
        handle_dup= DUP_ERROR;

      sql_exchange ex((char*)fname, sql_ex.opt_flags & DUMPFILE_FLAG);
      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);
      ex.field_term= &field_term;
      ex.enclosed= &enclosed;
      ex.line_term= &line_term;
      ex.line_start= &line_start;
      ex.escaped= &escaped;

      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;
      List<Item> field_list;
      set_fields(field_list);
      thd->variables.pseudo_thread_id= thread_id;
      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;
      }
      if (mysql_load(thd, &ex, &tables, field_list, handle_dup, net != 0,
		     TL_WRITE))
	thd->query_error = 1;
      if (thd->cuted_fields)
      {
	/*
	  log_pos is the position of the LOAD event in the master log
	*/
	sql_print_error("Slave: load data infile at position %s in log \
'%s' produced %d warning(s)", llstr(log_pos,llbuff), RPL_LOG_NAME, 
			thd->cuted_fields );
      }
      if (net)
        net->pkt_nr= thd->net.pkt_nr;
    }
  }
  else
  {
    /*
      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);
  }
	    
  thd->net.vio = 0; 
  thd->db= 0;					// prevent db from being freed
  close_thread_tables(thd);
  if (thd->query_error)
  {
    /* this err/sql_errno code is copy-paste from send_error() */
    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);       
    }
    slave_print_error(rli,sql_errno,
		      "Error '%s' running load data infile",
		      err);
    free_root(&thd->mem_root,0);
    return 1;
  }
  free_root(&thd->mem_root,0);
	    
  if (thd->is_fatal_error)
  {
    sql_print_error("Fatal error running LOAD DATA INFILE");
    return 1;
  }

  return ( use_rli_only_for_errors ? 0 : Log_event::exec_event(rli) ); 
}
#endif


/**************************************************************************
  Rotate_log_event methods
**************************************************************************/

/*
  Rotate_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Rotate_log_event::pack_info(Protocol *protocol)
{
  char *buf, *b_pos;
  if (!(buf= my_malloc(ident_len + 45, MYF(MY_WME))))
    return;
  b_pos= buf;
  memcpy(buf, new_log_ident, ident_len);
  b_pos+= ident_len;
  b_pos= strmov(b_pos, ";pos=");
  b_pos=longlong10_to_str(pos, b_pos, 10);
  protocol->store(buf, b_pos-buf, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
#endif


/*
  Rotate_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Rotate_log_event::print(FILE* file, bool short_form, char* last_db)
{
  char buf[22];
  if (short_form)
    return;

  print_header(file);
  fprintf(file, "\tRotate to ");
  if (new_log_ident)
    my_fwrite(file, (byte*) new_log_ident, (uint)ident_len, 
	      MYF(MY_NABP | MY_WME));
  fprintf(file, "  pos: %s", llstr(pos, buf));
  fputc('\n', file);
  fflush(file);
}
#endif // MYSQL_CLIENT


/*
  Rotate_log_event::Rotate_log_event()
*/

Rotate_log_event::Rotate_log_event(const char* buf, int event_len,
				   bool old_format)
  :Log_event(buf, old_format),new_log_ident(NULL),alloced(0)
{
  // The caller will ensure that event_len is what we have at EVENT_LEN_OFFSET
  int header_size = (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  uint ident_offset;
  if (event_len < header_size)
    return;
  buf += header_size;
  if (old_format)
  {
    ident_len = (uint)(event_len - OLD_HEADER_LEN);
    pos = 4;
    ident_offset = 0;
  }
  else
  {
    ident_len = (uint)(event_len - ROTATE_EVENT_OVERHEAD);
    pos = uint8korr(buf + R_POS_OFFSET);
    ident_offset = ROTATE_HEADER_LEN;
  }
  set_if_smaller(ident_len,FN_REFLEN-1);
  if (!(new_log_ident= my_strdup_with_length((byte*) buf +
					     ident_offset,
					     (uint) ident_len,
					     MYF(MY_WME))))
    return;
  alloced = 1;
}


/*
  Rotate_log_event::write_data()
*/

int Rotate_log_event::write_data(IO_CACHE* file)
{
  char buf[ROTATE_HEADER_LEN];
  int8store(buf, pos + R_POS_OFFSET);
  return (my_b_safe_write(file, (byte*)buf, ROTATE_HEADER_LEN) ||
	  my_b_safe_write(file, (byte*)new_log_ident, (uint) ident_len));
}


/*
  Rotate_log_event::exec_event()

  Got a rotate log even from the master

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

    We can't rotate the slave as this will cause infinitive rotations
    in a A -> B -> A setup.

  RETURN VALUES
    0	ok
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Rotate_log_event::exec_event(struct st_relay_log_info* rli)
{
  char* log_name = rli->group_master_log_name;
  DBUG_ENTER("Rotate_log_event::exec_event");

  pthread_mutex_lock(&rli->data_lock);
  memcpy(log_name, new_log_ident, ident_len+1);
  rli->group_master_log_pos = pos;
  rli->event_relay_log_pos += get_event_len();
  rli->group_relay_log_pos = rli->event_relay_log_pos;
  DBUG_PRINT("info", ("group_master_log_pos: %d", (ulong) rli->group_master_log_pos));
  pthread_mutex_unlock(&rli->data_lock);
  pthread_cond_broadcast(&rli->data_cond);
  flush_relay_log_info(rli);
  DBUG_RETURN(0);
}
#endif


/**************************************************************************
	Intvar_log_event methods
**************************************************************************/

/*
  Intvar_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Intvar_log_event::pack_info(Protocol *protocol)
{
  char buf[64], *pos;
  pos= strmov(buf, get_var_type_name());
  *(pos++)='=';
  pos= longlong10_to_str(val, pos, -10);
  protocol->store(buf, pos-buf, &my_charset_bin);
}
#endif


/*
  Intvar_log_event::Intvar_log_event()
*/

Intvar_log_event::Intvar_log_event(const char* buf, bool old_format)
  :Log_event(buf, old_format)
{
  buf += (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  type = buf[I_TYPE_OFFSET];
  val = uint8korr(buf+I_VAL_OFFSET);
}


/*
  Intvar_log_event::get_var_type_name()
*/

const char* Intvar_log_event::get_var_type_name()
{
  switch(type) {
  case LAST_INSERT_ID_EVENT: return "LAST_INSERT_ID";
  case INSERT_ID_EVENT: return "INSERT_ID";
  default: /* impossible */ return "UNKNOWN";
  }
}


/*
  Intvar_log_event::write_data()
*/

int Intvar_log_event::write_data(IO_CACHE* file)
{
  char buf[9];
  buf[I_TYPE_OFFSET] = type;
  int8store(buf + I_VAL_OFFSET, val);
  return my_b_safe_write(file, (byte*) buf, sizeof(buf));
}


/*
  Intvar_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Intvar_log_event::print(FILE* file, bool short_form, char* last_db)
{
  char llbuff[22];
  const char *msg;
  LINT_INIT(msg);

  if (!short_form)
  {
    print_header(file);
    fprintf(file, "\tIntvar\n");
  }

  fprintf(file, "SET ");
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    msg="LAST_INSERT_ID";
    break;
  case INSERT_ID_EVENT:
    msg="INSERT_ID";
    break;
  }
  fprintf(file, "%s=%s;\n", msg, llstr(val,llbuff));
  fflush(file);
}
#endif


/*
  Intvar_log_event::exec_event()
*/

#if defined(HAVE_REPLICATION)&& !defined(MYSQL_CLIENT)
int Intvar_log_event::exec_event(struct st_relay_log_info* rli)
{
  switch (type) {
  case LAST_INSERT_ID_EVENT:
    thd->last_insert_id_used = 1;
    thd->last_insert_id = val;
    break;
  case INSERT_ID_EVENT:
    thd->next_insert_id = val;
    break;
  }
  rli->inc_event_relay_log_pos(get_event_len());
  return 0;
}
#endif


/**************************************************************************
  Rand_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Rand_log_event::pack_info(Protocol *protocol)
{
  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);
  protocol->store(buf1, (uint) (pos-buf1), &my_charset_bin);
}
#endif


Rand_log_event::Rand_log_event(const char* buf, bool old_format)
  :Log_event(buf, old_format)
{
  buf += (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  seed1 = uint8korr(buf+RAND_SEED1_OFFSET);
  seed2 = uint8korr(buf+RAND_SEED2_OFFSET);
}


int Rand_log_event::write_data(IO_CACHE* file)
{
  char buf[16];
  int8store(buf + RAND_SEED1_OFFSET, seed1);
  int8store(buf + RAND_SEED2_OFFSET, seed2);
  return my_b_safe_write(file, (byte*) buf, sizeof(buf));
}


#ifdef MYSQL_CLIENT
void Rand_log_event::print(FILE* file, bool short_form, char* last_db)
{
  char llbuff[22],llbuff2[22];
  if (!short_form)
  {
    print_header(file);
    fprintf(file, "\tRand\n");
  }
  fprintf(file, "SET @@RAND_SEED1=%s, @@RAND_SEED2=%s;\n",
	  llstr(seed1, llbuff),llstr(seed2, llbuff2));
  fflush(file);
}
#endif // MYSQL_CLIENT


#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Rand_log_event::exec_event(struct st_relay_log_info* rli)
{
  thd->rand.seed1= (ulong) seed1;
  thd->rand.seed2= (ulong) seed2;
  rli->inc_event_relay_log_pos(get_event_len());
  return 0;
}
#endif // !MYSQL_CLIENT


/**************************************************************************
  User_var_log_event methods
**************************************************************************/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void User_var_log_event::pack_info(Protocol* protocol)
{
  char *buf= 0;
  uint val_offset= 2 + name_len;
  uint event_len= val_offset;

  if (is_null)
  {
    buf= my_malloc(val_offset + 5, MYF(MY_WME));
    strmov(buf + val_offset, "NULL");
    event_len= val_offset + 4;
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
      buf= my_malloc(val_offset + FLOATING_POINT_BUFFER, MYF(MY_WME));
      event_len+= my_sprintf(buf + val_offset,
			     (buf + val_offset, "%.14g", real_val));
      break;
    case INT_RESULT:
      buf= my_malloc(val_offset + 22, MYF(MY_WME));
      event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf;
      break;
    case STRING_RESULT:
      /*
	This is correct as pack_info is used for SHOW BINLOG command
	only. But be carefull this is may be incorrect in other cases as
	string may contain \ and '.
      */
      event_len= val_offset + 2 + val_len;
      buf= my_malloc(event_len, MYF(MY_WME));
      buf[val_offset]= '\'';
      memcpy(buf + val_offset + 1, val, val_len);
      buf[val_offset + val_len + 1]= '\'';
      break;
    case ROW_RESULT:
    default:
      DBUG_ASSERT(1);
      return;
    }
  }
  buf[0]= '@';
  buf[1+name_len]= '=';
  memcpy(buf+1, name, name_len);
  protocol->store(buf, event_len, &my_charset_bin);
  my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
}
#endif // !MYSQL_CLIENT


User_var_log_event::User_var_log_event(const char* buf, bool old_format)
  :Log_event(buf, old_format)
{
  buf+= (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
  name_len= uint4korr(buf);
  name= (char *) buf + UV_NAME_LEN_SIZE;
  buf+= UV_NAME_LEN_SIZE + name_len;
  is_null= (bool) *buf;
  if (is_null)
  {
    type= STRING_RESULT;
    charset_number= my_charset_bin.number;
    val_len= 0;
    val= 0;  
  }
  else
  {
    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 + 
		       UV_CHARSET_NUMBER_SIZE);
    val= (char *) (buf + UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE +
		   UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE);
  }
}


int User_var_log_event::write_data(IO_CACHE* file)
{
  char buf[UV_NAME_LEN_SIZE];
  char buf1[UV_VAL_IS_NULL + UV_VAL_TYPE_SIZE + 
	    UV_CHARSET_NUMBER_SIZE + UV_VAL_LEN_SIZE];
  char buf2[8], *pos= buf2;
  uint buf1_length;

  int4store(buf, name_len);
  
  if ((buf1[0]= is_null))
  {
    buf1_length= 1;
    val_len= 0;
  }    
  else
  {
    buf1[1]= type;
    int4store(buf1 + 2, charset_number);
    int4store(buf1 + 2 + UV_CHARSET_NUMBER_SIZE, val_len);
    buf1_length= 10;

    switch (type) {
    case REAL_RESULT:
      float8store(buf2, *(double*) val);
      break;
    case INT_RESULT:
      int8store(buf2, *(longlong*) val);
      break;
    case STRING_RESULT:
      pos= val;
      break;
    case ROW_RESULT:
    default:
      DBUG_ASSERT(1);
      return 0;
    }
  }
  return (my_b_safe_write(file, (byte*) buf, sizeof(buf))   ||
	  my_b_safe_write(file, (byte*) name, name_len)     ||
	  my_b_safe_write(file, (byte*) buf1, buf1_length) ||
	  my_b_safe_write(file, (byte*) pos, val_len));
}


/*
  User_var_log_event::print()
*/

#ifdef MYSQL_CLIENT
void User_var_log_event::print(FILE* file, bool short_form, char* last_db)
{
  if (!short_form)
  {
    print_header(file);
    fprintf(file, "\tUser_var\n");
  }

  fprintf(file, "SET @");
  my_fwrite(file, (byte*) name, (uint) (name_len), MYF(MY_NABP | MY_WME));

  if (is_null)
  {
    fprintf(file, ":=NULL;\n");
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      double real_val;
      float8get(real_val, val);
      fprintf(file, ":=%.14g;\n", real_val);
      break;
    case INT_RESULT:
      char int_buf[22];
      longlong10_to_str(uint8korr(val), int_buf, -10);
      fprintf(file, ":=%s;\n", int_buf);
      break;
    case STRING_RESULT:
      fprintf(file, ":='%s';\n", val);
      break;
    case ROW_RESULT:
    default:
      DBUG_ASSERT(1);
      return;
    }
  }
  fflush(file);
}
#endif


/*
  User_var_log_event::exec_event()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int User_var_log_event::exec_event(struct st_relay_log_info* rli)
{
  Item *it= 0;
  CHARSET_INFO *charset= get_charset(charset_number, MYF(0));
  LEX_STRING user_var_name;
  user_var_name.str= name;
  user_var_name.length= name_len;
  double real_val;
  longlong int_val;

  if (is_null)
  {
    it= new Item_null();
  }
  else
  {
    switch (type) {
    case REAL_RESULT:
      float8get(real_val, val);
      it= new Item_real(real_val);
      val= (char*) &real_val;		// Pointer to value in native format
      val_len= sizeof(real_val);
      break;
    case INT_RESULT:
      int_val= (longlong) uint8korr(val);
      it= new Item_int(int_val);
      val= (char*) &int_val;		// Pointer to value in native format
      val_len= sizeof(int_val);
      break;
    case STRING_RESULT:
      it= new Item_string(val, val_len, charset);
      break;
    case ROW_RESULT:
    default:
      DBUG_ASSERT(1);
      return 0;
    }
  }
  Item_func_set_user_var e(user_var_name, it);
  e.fix_fields(thd, 0, 0);
  e.update_hash(val, val_len, type, charset, DERIVATION_NONE);
  free_root(&thd->mem_root,0);

  rli->inc_event_relay_log_pos(get_event_len());
  return 0;
}
#endif // !MYSQL_CLIENT


/**************************************************************************
  Slave_log_event methods
**************************************************************************/

#ifdef HAVE_REPLICATION
#ifdef MYSQL_CLIENT
void Unknown_log_event::print(FILE* file, bool short_form, char* last_db)
{
  if (short_form)
    return;
  print_header(file);
  fputc('\n', file);
  fprintf(file, "# %s", "Unknown event\n");
}
#endif  

#ifndef MYSQL_CLIENT
void Slave_log_event::pack_info(Protocol *protocol)
{
  char buf[256], *pos;
  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=");
  pos= longlong10_to_str(master_pos, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
}
#endif // !MYSQL_CLIENT


#ifndef MYSQL_CLIENT
Slave_log_event::Slave_log_event(THD* thd_arg,
				 struct st_relay_log_info* rli)
  :Log_event(thd_arg, 0, 0), mem_pool(0), master_host(0)
{
  DBUG_ENTER("Slave_log_event");
  if (!rli->inited)				// QQ When can this happen ?
    DBUG_VOID_RETURN;
  
  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);
  master_log_len = strlen(rli->group_master_log_name);
  // 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))))
  {
    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;
    memcpy(master_log, rli->group_master_log_name, master_log_len + 1);
    master_port = mi->port;
    master_pos = rli->group_master_log_pos;
    DBUG_PRINT("info", ("master_log: %s  pos: %d", master_log,
			(ulong) master_pos));
  }
  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;
}
#endif // !MYSQL_CLIENT


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


#ifdef MYSQL_CLIENT
void Slave_log_event::print(FILE* file, bool short_form, char* last_db)
{
  char llbuff[22];
  if (short_form)
    return;
  print_header(file);
  fputc('\n', file);
  fprintf(file, "Slave: master_host: '%s'  master_port: %d  \
master_log: '%s'  master_pos: %s\n",
	  master_host, master_port, master_log, llstr(master_pos, llbuff));
}
#endif // MYSQL_CLIENT


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


int Slave_log_event::write_data(IO_CACHE* file)
{
  int8store(mem_pool + SL_MASTER_POS_OFFSET, master_pos);
  int2store(mem_pool + SL_MASTER_PORT_OFFSET, master_port);
  // log and host are already there
  return my_b_safe_write(file, (byte*)mem_pool, get_data_size());
}


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)
  {
    master_host = 0;
    return;
  }
  master_log_len = strlen(master_log);
}


Slave_log_event::Slave_log_event(const char* buf, int event_len)
  :Log_event(buf,0),mem_pool(0),master_host(0)
{
  event_len -= LOG_EVENT_HEADER_LEN;
  if (event_len < 0)
    return;
  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);
}


#ifndef MYSQL_CLIENT
int Slave_log_event::exec_event(struct st_relay_log_info* rli)
{
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  return Log_event::exec_event(rli);
}
#endif // !MYSQL_CLIENT


/**************************************************************************
	Stop_log_event methods
**************************************************************************/

/*
  Stop_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Stop_log_event::print(FILE* file, bool short_form, char* last_db)
{
  if (short_form)
    return;

  print_header(file);
  fprintf(file, "\tStop\n");
  fflush(file);
}
#endif // MYSQL_CLIENT


/*
  Stop_log_event::exec_event()

  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 and DO
  RELEASE_LOCK (prepared statements' deletion is TODO).
  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 Start_log_event::exec_event(),
  not here. Because if we come here, the master was sane.
*/

#ifndef MYSQL_CLIENT
int Stop_log_event::exec_event(struct st_relay_log_info* rli)
{
  /*
    We do not want to update master_log pos because we get a rotate event
    before stop, so by now group_master_log_name is set to the next log.
    If we updated it, we will have incorrect master coordinates and this
    could give false triggers in MASTER_POS_WAIT() that we have reached
    the target position when in fact we have not.
  */
  rli->inc_group_relay_log_pos(get_event_len(), 0);  
  flush_relay_log_info(rli);
  return 0;
}
#endif /* !MYSQL_CLIENT */
#endif /* HAVE_REPLICATION */


/**************************************************************************
	Create_file_log_event methods
**************************************************************************/

/*
  Create_file_log_event ctor
*/

#ifndef MYSQL_CLIENT
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,
		      char* block_arg, uint block_len_arg, bool using_trans)
  :Load_log_event(thd_arg,ex,db_arg,table_name_arg,fields_arg,handle_dup,
		  using_trans),
   fake_base(0),block(block_arg),block_len(block_len_arg),
   file_id(thd_arg->file_id = mysql_bin_log.next_file_id())
{
  sql_ex.force_new_format();
}
#endif // !MYSQL_CLIENT


/*
  Create_file_log_event::write_data_body()
*/

int Create_file_log_event::write_data_body(IO_CACHE* file)
{
  int res;
  if ((res = Load_log_event::write_data_body(file)) || fake_base)
    return res;
  return (my_b_safe_write(file, (byte*) "", 1) ||
	  my_b_safe_write(file, (byte*) block, block_len));
}


/*
  Create_file_log_event::write_data_header()
*/

int Create_file_log_event::write_data_header(IO_CACHE* file)
{
  int res;
  if ((res = Load_log_event::write_data_header(file)) || fake_base)
    return res;
  byte buf[CREATE_FILE_HEADER_LEN];
  int4store(buf + CF_FILE_ID_OFFSET, file_id);
  return my_b_safe_write(file, buf, CREATE_FILE_HEADER_LEN);
}


/*
  Create_file_log_event::write_base()
*/

int Create_file_log_event::write_base(IO_CACHE* file)
{
  int res;
  fake_base = 1; // pretend we are Load event
  res = write(file);
  fake_base = 0;
  return res;
}


/*
  Create_file_log_event ctor
*/

Create_file_log_event::Create_file_log_event(const char* buf, int len,
					     bool old_format)
  :Load_log_event(buf,0,old_format),fake_base(0),block(0),inited_from_old(0)
{
  int block_offset;
  if (copy_log_event(buf,len,old_format))
    return;
  if (!old_format)
  {
    file_id = uint4korr(buf + LOG_EVENT_HEADER_LEN +
			+ LOAD_HEADER_LEN + CF_FILE_ID_OFFSET);
    // + 1 for \0 terminating fname  
    block_offset = (LOG_EVENT_HEADER_LEN + Load_log_event::get_data_size() +
		    CREATE_FILE_HEADER_LEN + 1);
    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;
  }
}


/*
  Create_file_log_event::print()
*/

#ifdef MYSQL_CLIENT
void Create_file_log_event::print(FILE* file, bool short_form, 
				  char* last_db, bool enable_local)
{
  if (short_form)
  {
    if (enable_local && check_fname_outside_temp_buf())
      Load_log_event::print(file, 1, last_db);
    return;
  }

  if (enable_local)
  {
    if (!check_fname_outside_temp_buf())
      fprintf(file, "#");
    Load_log_event::print(file, 1, last_db);
    fprintf(file, "#");
  }

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

void Create_file_log_event::print(FILE* file, bool short_form,
				  char* last_db)
{
  print(file,short_form,last_db,0);
}
#endif // MYSQL_CLIENT


/*
  Create_file_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Create_file_log_event::pack_info(Protocol *protocol)
{
  char buf[NAME_LEN*2 + 30 + 21*2], *pos;
  pos= strmov(buf, "db=");
  memcpy(pos, db, db_len);
  pos+= db_len;
  pos= strmov(pos, ";table=");
  memcpy(pos, table_name, table_name_len);
  pos+= table_name_len;
  pos= strmov(pos, ";file_id=");
  pos= int10_to_str((long) file_id, pos, 10);
  pos= strmov(pos, ";block_len=");
  pos= int10_to_str((long) block_len, pos, 10);
  protocol->store(buf, pos-buf, &my_charset_bin);
}
#endif


/*
  Create_file_log_event::exec_event()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Create_file_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname_buf[FN_REFLEN+10];
  char *p;
  int fd = -1;
  IO_CACHE file;
  int error = 1;

  bzero((char*)&file, sizeof(file));
  p = slave_load_file_stem(fname_buf, file_id, server_id);
  strmov(p, ".info");			// strmov takes less code than memcpy
  if ((fd = my_open(fname_buf, O_WRONLY|O_CREAT|O_BINARY|O_TRUNC,
		    MYF(MY_WME))) < 0 ||
      init_io_cache(&file, fd, IO_SIZE, WRITE_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
    slave_print_error(rli,my_errno, "Could not open file '%s'", fname_buf);
    goto err;
  }
  
  // a trick to avoid allocating another buffer
  strmov(p, ".data");
  fname = fname_buf;
  fname_len = (uint)(p-fname) + 5;
  if (write_base(&file))
  {
    strmov(p, ".info"); // to have it right in the error message
    slave_print_error(rli,my_errno, "Could not write to file '%s'", fname_buf);
    goto err;
  }
  end_io_cache(&file);
  my_close(fd, MYF(0));
  
  // fname_buf now already has .data, not .info, because we did our trick
  if ((fd = my_open(fname_buf, O_WRONLY|O_CREAT|O_BINARY|O_TRUNC,
		    MYF(MY_WME))) < 0)
  {
    slave_print_error(rli,my_errno, "Could not open file '%s'", fname_buf);
    goto err;
  }
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
  {
    slave_print_error(rli,my_errno, "Write to '%s' failed", fname_buf);
    goto err;
  }
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  error=0;					// Everything is ok

err:
  if (error)
    end_io_cache(&file);
  if (fd >= 0)
    my_close(fd, MYF(0));
  return error ? 1 : Log_event::exec_event(rli);
}
#endif


/**************************************************************************
	Append_block_log_event methods
**************************************************************************/

/*
  Append_block_log_event ctor
*/

#ifndef MYSQL_CLIENT  
Append_block_log_event::Append_block_log_event(THD* thd_arg, char* block_arg,
					       uint block_len_arg,
					       bool using_trans)
  :Log_event(thd_arg,0, using_trans), block(block_arg),
   block_len(block_len_arg), file_id(thd_arg->file_id)
{
}
#endif


/*
  Append_block_log_event ctor
*/

Append_block_log_event::Append_block_log_event(const char* buf, int len)
  :Log_event(buf, 0),block(0)
{
  if ((uint)len < APPEND_BLOCK_EVENT_OVERHEAD)
    return;
  file_id = uint4korr(buf + LOG_EVENT_HEADER_LEN + AB_FILE_ID_OFFSET);
  block = (char*)buf + APPEND_BLOCK_EVENT_OVERHEAD;
  block_len = len - APPEND_BLOCK_EVENT_OVERHEAD;
}


/*
  Append_block_log_event::write_data()
*/

int Append_block_log_event::write_data(IO_CACHE* file)
{
  byte buf[APPEND_BLOCK_HEADER_LEN];
  int4store(buf + AB_FILE_ID_OFFSET, file_id);
  return (my_b_safe_write(file, buf, APPEND_BLOCK_HEADER_LEN) ||
	  my_b_safe_write(file, (byte*) block, block_len));
}


/*
  Append_block_log_event::print()
*/

#ifdef MYSQL_CLIENT  
void Append_block_log_event::print(FILE* file, bool short_form,
				   char* last_db)
{
  if (short_form)
    return;
  print_header(file);
  fputc('\n', file);
  fprintf(file, "#Append_block: file_id: %d  block_len: %d\n",
	  file_id, block_len);
}
#endif // MYSQL_CLIENT


/*
  Append_block_log_event::pack_info()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Append_block_log_event::pack_info(Protocol *protocol)
{
  char buf[256];
  uint length;
  length= (uint) my_sprintf(buf,
			    (buf, ";file_id=%u;block_len=%u", file_id,
			     block_len));
  protocol->store(buf, (int32) length, &my_charset_bin);
}
#endif


/*
  Append_block_log_event::exec_event()
*/

#if defined( HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Append_block_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
  char *p= slave_load_file_stem(fname, file_id, server_id);
  int fd;
  int error = 1;

  memcpy(p, ".data", 6);
  if ((fd = my_open(fname, O_WRONLY|O_APPEND|O_BINARY, MYF(MY_WME))) < 0)
  {
    slave_print_error(rli,my_errno, "Could not open file '%s'", fname);
    goto err;
  }
  if (my_write(fd, (byte*) block, block_len, MYF(MY_WME+MY_NABP)))
  {
    slave_print_error(rli,my_errno, "Write to '%s' failed", fname);
    goto err;
  }
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  error=0;

err:
  if (fd >= 0)
    my_close(fd, MYF(0));
  return error ? error : Log_event::exec_event(rli);
}
#endif


/**************************************************************************
	Delete_file_log_event methods
**************************************************************************/

/*
  Delete_file_log_event ctor
*/

#ifndef MYSQL_CLIENT
Delete_file_log_event::Delete_file_log_event(THD *thd_arg, bool using_trans)
  :Log_event(thd_arg, 0, using_trans),file_id(thd_arg->file_id)
{
}
#endif

/*
  Delete_file_log_event ctor
*/

Delete_file_log_event::Delete_file_log_event(const char* buf, int len)
  :Log_event(buf, 0),file_id(0)
{
  if ((uint)len < DELETE_FILE_EVENT_OVERHEAD)
    return;
  file_id = uint4korr(buf + LOG_EVENT_HEADER_LEN + AB_FILE_ID_OFFSET);
}


/*
  Delete_file_log_event::write_data()
*/

int Delete_file_log_event::write_data(IO_CACHE* file)
{
 byte buf[DELETE_FILE_HEADER_LEN];
 int4store(buf + DF_FILE_ID_OFFSET, file_id);
 return my_b_safe_write(file, buf, DELETE_FILE_HEADER_LEN);
}


/*
  Delete_file_log_event::print()
*/

#ifdef MYSQL_CLIENT  
void Delete_file_log_event::print(FILE* file, bool short_form,
				  char* last_db)
{
  if (short_form)
    return;
  print_header(file);
  fputc('\n', file);
  fprintf(file, "#Delete_file: file_id=%u\n", file_id);
}
#endif // MYSQL_CLIENT

/*
  Delete_file_log_event::pack_info()
*/

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

/*
  Delete_file_log_event::exec_event()
*/

#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Delete_file_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
  char *p= slave_load_file_stem(fname, file_id, server_id);
  memcpy(p, ".data", 6);
  (void) my_delete(fname, MYF(MY_WME));
  memcpy(p, ".info", 6);
  (void) my_delete(fname, MYF(MY_WME));
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  return Log_event::exec_event(rli);
}
#endif


/**************************************************************************
	Execute_load_log_event methods
**************************************************************************/

/*
  Execute_load_log_event ctor
*/

#ifndef MYSQL_CLIENT  
Execute_load_log_event::Execute_load_log_event(THD *thd_arg, bool using_trans)
  :Log_event(thd_arg, 0, using_trans), file_id(thd_arg->file_id)
{
}
#endif
  

/*
  Execute_load_log_event ctor
*/

Execute_load_log_event::Execute_load_log_event(const char* buf, int len)
  :Log_event(buf, 0), file_id(0)
{
  if ((uint)len < EXEC_LOAD_EVENT_OVERHEAD)
    return;
  file_id = uint4korr(buf + LOG_EVENT_HEADER_LEN + EL_FILE_ID_OFFSET);
}


/*
  Execute_load_log_event::write_data()
*/

int Execute_load_log_event::write_data(IO_CACHE* file)
{
  byte buf[EXEC_LOAD_HEADER_LEN];
  int4store(buf + EL_FILE_ID_OFFSET, file_id);
  return my_b_safe_write(file, buf, EXEC_LOAD_HEADER_LEN);
}


/*
  Execute_load_log_event::print()
*/

#ifdef MYSQL_CLIENT  
void Execute_load_log_event::print(FILE* file, bool short_form,
				   char* last_db)
{
  if (short_form)
    return;
  print_header(file);
  fputc('\n', file);
  fprintf(file, "#Exec_load: file_id=%d\n",
	  file_id);
}
#endif

/*
  Execute_load_log_event::pack_info()
*/

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


/*
  Execute_load_log_event::exec_event()
*/

int Execute_load_log_event::exec_event(struct st_relay_log_info* rli)
{
  char fname[FN_REFLEN+10];
  char *p= slave_load_file_stem(fname, file_id, server_id);
  int fd;
  int error = 1;
  ulong save_options;
  IO_CACHE file;
  Load_log_event* lev = 0;

  memcpy(p, ".info", 6);
  if ((fd = my_open(fname, O_RDONLY|O_BINARY, MYF(MY_WME))) < 0 ||
      init_io_cache(&file, fd, IO_SIZE, READ_CACHE, (my_off_t)0, 0,
		    MYF(MY_WME|MY_NABP)))
  {
    slave_print_error(rli,my_errno, "Could not open file '%s'", fname);
    goto err;
  }
  if (!(lev = (Load_log_event*)Log_event::read_log_event(&file,
							 (pthread_mutex_t*)0,
							 (bool)0)) ||
      lev->get_type_code() != NEW_LOAD_EVENT)
  {
    slave_print_error(rli,0, "File '%s' appears corrupted", fname);
    goto err;
  }
  /*
    We are going to create a Load_log_event to finally load into the table.
    This event should not go into the binlog: in the binlog we only want the
    Create_file, Append_blocks and Execute_load. We disable binary logging and
    restore the thread's options just after finishing the load.
  */
  save_options = thd->options;
  thd->options &= ~ (ulong) (OPTION_BIN_LOG);
  lev->thd = thd;
  /*
    lev->exec_event should use rli only for errors
    i.e. should not advance rli's position
  */
  if (lev->exec_event(0,rli,1)) 
  {
    slave_print_error(rli,my_errno, "Failed executing load from '%s'", fname);
    thd->options = save_options;
    goto err;
  }
  thd->options = save_options;
  (void) my_delete(fname, MYF(MY_WME));
  memcpy(p, ".data", 6);
  (void) my_delete(fname, MYF(MY_WME));
  if (mysql_bin_log.is_open())
    mysql_bin_log.write(this);
  error = 0;

err:
  delete lev;
  if (fd >= 0)
  {
    my_close(fd, MYF(0));
    end_io_cache(&file);
  }
  return error ? error : Log_event::exec_event(rli);
}

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


/**************************************************************************
	sql_ex_info methods
**************************************************************************/

/*
  sql_ex_info::write_data()
*/

int sql_ex_info::write_data(IO_CACHE* file)
{
  if (new_format())
  {
    return (write_str(file, field_term, field_term_len) ||
	    write_str(file, enclosed,   enclosed_len) ||
	    write_str(file, line_term,  line_term_len) ||
	    write_str(file, line_start, line_start_len) ||
	    write_str(file, escaped,    escaped_len) ||
	    my_b_safe_write(file,(byte*) &opt_flags,1));
  }
  else
  {
    old_sql_ex old_ex;
    old_ex.field_term= *field_term;
    old_ex.enclosed=   *enclosed;
    old_ex.line_term=  *line_term;
    old_ex.line_start= *line_start;
    old_ex.escaped=    *escaped;
    old_ex.opt_flags=  opt_flags;
    old_ex.empty_flags=empty_flags;
    return my_b_safe_write(file, (byte*) &old_ex, sizeof(old_ex));
  }
}


/*
  sql_ex_info::init()
*/

char* sql_ex_info::init(char* buf,char* buf_end,bool use_new_format)
{
  cached_new_format = use_new_format;
  if (use_new_format)
  {
    empty_flags=0;
    /*
      The code below assumes that buf will not disappear from
      under our feet during the lifetime of the event. This assumption
      holds true in the slave thread if the log is in new format, but is not
      the case when we have old format because we will be reusing net buffer
      to read the actual file before we write out the Create_file event.
    */
    if (read_str(buf, buf_end, field_term, field_term_len) ||
	read_str(buf, buf_end, enclosed,   enclosed_len) ||
	read_str(buf, buf_end, line_term,  line_term_len) ||
	read_str(buf, buf_end, line_start, line_start_len) ||
	read_str(buf, buf_end, escaped,	   escaped_len))
      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;
}