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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.

   There are special exceptions to the terms and conditions of the GPL as it
   is applied to this software. View the full text of the exception in file
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   EXCEPTIONS-CLIENT in the directory of this software distribution.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   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 */
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#include <my_global.h>
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#include <my_sys.h>
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#include <my_time.h>
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#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
#ifdef	 HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(MSDOS) && !defined(__WIN__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_SELECT_H
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#include <select.h>
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#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
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#endif /* !defined(MSDOS) && !defined(__WIN__) */
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#ifdef HAVE_POLL
#include <sys/poll.h>
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#endif
#ifdef HAVE_SYS_UN_H
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#include <sys/un.h>
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#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h>				/* because of signal()	*/
#endif
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

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#include <sql_common.h>
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#include "client_settings.h"
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#undef net_buffer_length
#undef max_allowed_packet
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ulong 		net_buffer_length=8192;
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ulong		max_allowed_packet= 1024L*1024L*1024L;
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#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool	net_flush(NET *net);
#endif

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#if defined(MSDOS) || defined(__WIN__)
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/* socket_errno is defined in my_global.h for all platforms */
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#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
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#endif /* __WIN__ */
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/*
  If allowed through some configuration, then this needs to
  be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
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#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)

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static void append_wild(char *to,char *end,const char *wild);
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sig_handler my_pipe_sig_handler(int sig);
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static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;

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/*
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  Initialize the MySQL client library
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  SYNOPSIS
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    mysql_server_init()
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  NOTES
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    Should be called before doing any other calls to the MySQL
    client library to initialize thread specific variables etc.
    It's called by mysql_init() to ensure that things will work for
    old not threaded applications that doesn't call mysql_server_init()
    directly.
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  RETURN
    0  ok
    1  could not initialize environment (out of memory or thread keys)
*/

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int STDCALL mysql_server_init(int argc __attribute__((unused)),
			      char **argv __attribute__((unused)),
			      char **groups __attribute__((unused)))
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{
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  int result= 0;
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  if (!mysql_client_init)
  {
    mysql_client_init=1;
    org_my_init_done=my_init_done;
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    if (my_init())				/* Will init threads */
      return 1;
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    init_client_errs();
    if (!mysql_port)
    {
      mysql_port = MYSQL_PORT;
#ifndef MSDOS
      {
	struct servent *serv_ptr;
	char	*env;
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        /*
          if builder specifically requested a default port, use that
          (even if it coincides with our factory default).
          only if they didn't do we check /etc/services (and, failing
          on that, fall back to the factory default of 3306).
          either default can be overridden by the environment variable
          MYSQL_TCP_PORT, which in turn can be overridden with command
          line options.
        */

#if MYSQL_PORT_DEFAULT == 0
        if ((serv_ptr = getservbyname("mysql", "tcp")))
          mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
#endif
        if ((env = getenv("MYSQL_TCP_PORT")))
          mysql_port =(uint) atoi(env);
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      }
#endif
    }
    if (!mysql_unix_port)
    {
      char *env;
#ifdef __WIN__
      mysql_unix_port = (char*) MYSQL_NAMEDPIPE;
#else
      mysql_unix_port = (char*) MYSQL_UNIX_ADDR;
#endif
      if ((env = getenv("MYSQL_UNIX_PORT")))
	mysql_unix_port = env;
    }
    mysql_debug(NullS);
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#if defined(SIGPIPE) && !defined(__WIN__) && !defined(__NETWARE__)
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    (void) signal(SIGPIPE, SIG_IGN);
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#endif
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#ifdef EMBEDDED_LIBRARY
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    if (argc > -1)
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       result= init_embedded_server(argc, argv, groups);
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#endif
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  }
#ifdef THREAD
  else
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    result= (int)my_thread_init();         /* Init if new thread */
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#endif
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  return result;
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}
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/*
  Free all memory and resources used by the client library

  NOTES
    When calling this there should not be any other threads using
    the library.

    To make things simpler when used with windows dll's (which calls this
    function automaticly), it's safe to call this function multiple times.
*/


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void STDCALL mysql_server_end()
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{
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  if (!mysql_client_init)
    return;

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#ifdef EMBEDDED_LIBRARY
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  end_embedded_server();
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#endif
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  finish_client_errs();
  vio_end();

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  /* If library called my_init(), free memory allocated by it */
  if (!org_my_init_done)
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  {
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    my_end(MY_DONT_FREE_DBUG);
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#ifndef THREAD
  /* Remove TRACING, if enabled by mysql_debug() */
    DBUG_POP();
#endif
  }
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  else
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  {
    free_charsets();
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    mysql_thread_end();
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  }

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  mysql_client_init= org_my_init_done= 0;
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#ifdef EMBEDDED_SERVER
  if (stderror_file)
  {
    fclose(stderror_file);
    stderror_file= 0;
  }
#endif
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}
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static MYSQL_PARAMETERS mysql_internal_parameters=
{&max_allowed_packet, &net_buffer_length};

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MYSQL_PARAMETERS *STDCALL mysql_get_parameters(void)
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{
  return &mysql_internal_parameters;
}

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my_bool STDCALL mysql_thread_init()
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{
#ifdef THREAD
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  return my_thread_init();
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#else
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  return 0;
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#endif
}

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void STDCALL mysql_thread_end()
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{
#ifdef THREAD
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  my_thread_end();
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#endif
}

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/*
  Let the user specify that we don't want SIGPIPE;  This doesn't however work
  with threaded applications as we can have multiple read in progress.
*/
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static MYSQL* spawn_init(MYSQL* parent, const char* host,
			 unsigned int port,
			 const char* user,
			 const char* passwd);

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/*
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  Expand wildcard to a sql string
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*/

static void
append_wild(char *to, char *end, const char *wild)
{
  end-=5;					/* Some extra */
  if (wild && wild[0])
  {
    to=strmov(to," like '");
    while (*wild && to < end)
    {
      if (*wild == '\\' || *wild == '\'')
	*to++='\\';
      *to++= *wild++;
    }
    if (*wild)					/* Too small buffer */
      *to++='%';				/* Nicer this way */
    to[0]='\'';
    to[1]=0;
  }
}


/**************************************************************************
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  Init debugging if MYSQL_DEBUG environment variable is found
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**************************************************************************/

void STDCALL
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mysql_debug(const char *debug __attribute__((unused)))
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{
#ifndef DBUG_OFF
  char	*env;
  if (_db_on_)
    return;					/* Already using debugging */
  if (debug)
  {
    DEBUGGER_ON;
    DBUG_PUSH(debug);
  }
  else if ((env = getenv("MYSQL_DEBUG")))
  {
    DEBUGGER_ON;
    DBUG_PUSH(env);
#if !defined(_WINVER) && !defined(WINVER)
    puts("\n-------------------------------------------------------");
    puts("MYSQL_DEBUG found. libmysql started with the following:");
    puts(env);
    puts("-------------------------------------------------------\n");
#else
    {
      char buff[80];
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      buff[sizeof(buff)-1]= 0;
      strxnmov(buff,sizeof(buff)-1,"libmysql: ", env, NullS);
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      MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
    }
#endif
  }
#endif
}


/**************************************************************************
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  Close the server connection if we get a SIGPIPE
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   ARGSUSED
**************************************************************************/

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sig_handler
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my_pipe_sig_handler(int sig __attribute__((unused)))
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{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
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  (void) signal(SIGPIPE, my_pipe_sig_handler);
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#endif
}

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/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
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				   unsigned long length)
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{
  DBUG_ENTER("mysql_master_query");
  if (mysql_master_send_query(mysql, q, length))
    DBUG_RETURN(1);
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  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
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}
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my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
					unsigned long length)
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{
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  MYSQL *master = mysql->master;
  DBUG_ENTER("mysql_master_send_query");
  if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
    DBUG_RETURN(1);
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  master->reconnect= 1;
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  mysql->last_used_con = master;
  DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
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}


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/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
				  unsigned long length)
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{
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  DBUG_ENTER("mysql_slave_query");
  if (mysql_slave_send_query(mysql, q, length))
    DBUG_RETURN(1);
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  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
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}


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my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
				   unsigned long length)
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{
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  MYSQL* last_used_slave, *slave_to_use = 0;
  DBUG_ENTER("mysql_slave_send_query");
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  if ((last_used_slave = mysql->last_used_slave))
    slave_to_use = last_used_slave->next_slave;
  else
    slave_to_use = mysql->next_slave;
  /*
    Next_slave is always safe to use - we have a circular list of slaves
    if there are no slaves, mysql->next_slave == mysql
  */
  mysql->last_used_con = mysql->last_used_slave = slave_to_use;
  if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
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						    0,0,0,0))
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    DBUG_RETURN(1);
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  slave_to_use->reconnect= 1;
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  DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
}
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/* enable/disable parsing of all queries to decide
   if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 1;
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}

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void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 0;
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}

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/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
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{
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  return mysql->options.rpl_parse;
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}

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/*  enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
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{
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  mysql->options.no_master_reads = 0;
}
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void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
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{
  mysql->options.no_master_reads = 1;
}

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/* get the value of the master read flag */
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my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
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{
  return !(mysql->options.no_master_reads);
}

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/*
  We may get an error while doing replication internals.
  In this case, we add a special explanation to the original
  error
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*/
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static void expand_error(MYSQL* mysql, int error)
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{
  char tmp[MYSQL_ERRMSG_SIZE];
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  char *p;
  uint err_length;
  strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
  p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
  err_length= (uint) (p - mysql->net.last_error);
  strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
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  mysql->net.last_errno = error;
}

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/*
  This function assumes we have just called SHOW SLAVE STATUS and have
  read the given result and row
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*/
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static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
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{
  MYSQL* master;
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  DBUG_ENTER("get_master");
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  if (mysql_num_fields(res) < 3)
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    DBUG_RETURN(1); /* safety */
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  /* use the same username and password as the original connection */
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  if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
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    DBUG_RETURN(1);
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  mysql->master = master;
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  DBUG_RETURN(0);
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}

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/*
  Assuming we already know that mysql points to a master connection,
  retrieve all the slaves
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*/
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static my_bool get_slaves_from_master(MYSQL* mysql)
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{
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  MYSQL_RES* res = 0;
  MYSQL_ROW row;
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  my_bool error = 1;
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  int has_auth_info;
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  int port_ind;
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  DBUG_ENTER("get_slaves_from_master");
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  if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
  {
    expand_error(mysql, CR_PROBE_MASTER_CONNECT);
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    DBUG_RETURN(1);
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  }
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  mysql->reconnect= 1;
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  if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
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    DBUG_RETURN(1);
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  }

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  switch (mysql_num_fields(res)) {
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  case 5:
    has_auth_info = 0;
    port_ind=2;
    break;
  case 7:
    has_auth_info = 1;
    port_ind=4;
    break;
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  default:
    goto err;
  }

  while ((row = mysql_fetch_row(res)))
  {
    MYSQL* slave;
    const char* tmp_user, *tmp_pass;

    if (has_auth_info)
    {
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      tmp_user = row[2];
      tmp_pass = row[3];
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    }
    else
    {
      tmp_user = mysql->user;
      tmp_pass = mysql->passwd;
    }

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    if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
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			     tmp_user, tmp_pass)))
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      goto err;
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    /* Now add slave into the circular linked list */
    slave->next_slave = mysql->next_slave;
    mysql->next_slave = slave;
  }
  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}

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my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
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{
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  MYSQL_RES *res= 0;
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  MYSQL_ROW row;
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  my_bool error= 1;
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  DBUG_ENTER("mysql_rpl_probe");

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  /*
    First determine the replication role of the server we connected to
    the most reliable way to do this is to run SHOW SLAVE STATUS and see
    if we have a non-empty master host. This is still not fool-proof -
    it is not a sin to have a master that has a dormant slave thread with
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    a non-empty master host. However, it is more reliable to check
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    for empty master than whether the slave thread is actually running
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  */
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  if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_STATUS);
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    DBUG_RETURN(1);
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  }
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  row= mysql_fetch_row(res);
  /*
    Check master host for emptiness/NULL
    For MySQL 4.0 it's enough to check for row[0]
  */
  if (row && row[0] && *(row[0]))
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  {
    /* this is a slave, ask it for the master */
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    if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
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      goto err;
  }
  else
  {
    mysql->master = mysql;
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    if (get_slaves_from_master(mysql))
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      goto err;
  }

  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}


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/*
  Make a not so fool-proof decision on where the query should go, to
  the master or the slave. Ideally the user should always make this
  decision himself with mysql_master_query() or mysql_slave_query().
  However, to be able to more easily port the old code, we support the
  option of an educated guess - this should work for most applications,
  however, it may make the wrong decision in some particular cases. If
  that happens, the user would have to change the code to call
  mysql_master_query() or mysql_slave_query() explicitly in the place
  where we have made the wrong decision
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*/
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enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
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{
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  const char *q_end= q + len;
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  for (; q < q_end; ++q)
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  {
    char c;
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    if (my_isalpha(&my_charset_latin1, (c= *q)))
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    {
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      switch (my_tolower(&my_charset_latin1,c)) {
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      case 'i':  /* insert */
      case 'u':  /* update or unlock tables */
      case 'l':  /* lock tables or load data infile */
      case 'd':  /* drop or delete */
      case 'a':  /* alter */
	return MYSQL_RPL_MASTER;
      case 'c':  /* create or check */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_MASTER;
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      case 's': /* select or show */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_SLAVE;
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      case 'f': /* flush */
      case 'r': /* repair */
      case 'g': /* grant */
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	return MYSQL_RPL_ADMIN;
      default:
	return MYSQL_RPL_SLAVE;
      }
    }
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  }
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  return MYSQL_RPL_MASTER;		/* By default, send to master */
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}


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/**************************************************************************
  Connect to sql server
  If host == 0 then use localhost
**************************************************************************/
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#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
	      const char *user, const char *passwd)
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{
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  MYSQL *res;
  mysql=mysql_init(mysql);			/* Make it thread safe */
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  {
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    DBUG_ENTER("mysql_connect");
    if (!(res=mysql_real_connect(mysql,host,user,passwd,NullS,0,NullS,0)))
    {
      if (mysql->free_me)
	my_free((gptr) mysql,MYF(0));
    }
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    mysql->reconnect= 1;
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    DBUG_RETURN(res);
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  }
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}
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#endif
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/**************************************************************************
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  Change user and database
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**************************************************************************/
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int cli_read_change_user_result(MYSQL *mysql, char *buff, const char *passwd)
{
  NET *net= &mysql->net;
  ulong pkt_length;

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  pkt_length= cli_safe_read(mysql);
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  if (pkt_length == packet_error)
    return 1;

  if (pkt_length == 1 && net->read_pos[0] == 254 &&
      mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
  {
    /*
      By sending this very specific reply server asks us to send scrambled
      password in old format. The reply contains scramble_323.
    */
    scramble_323(buff, mysql->scramble, passwd);
    if (my_net_write(net, buff, SCRAMBLE_LENGTH_323 + 1) || net_flush(net))
    {
      net->last_errno= CR_SERVER_LOST;
      strmov(net->sqlstate, unknown_sqlstate);
      strmov(net->last_error,ER(net->last_errno));
      return 1;
    }
    /* Read what server thinks about out new auth message report */
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    if (cli_safe_read(mysql) == packet_error)
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      return 1;
  }
  return 0;
}
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my_bool	STDCALL mysql_change_user(MYSQL *mysql, const char *user,
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				  const char *passwd, const char *db)
{
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  char buff[USERNAME_LENGTH+SCRAMBLED_PASSWORD_CHAR_LENGTH+NAME_LEN+2];
  char *end= buff;
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  int rc;
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  DBUG_ENTER("mysql_change_user");

  if (!user)
    user="";
  if (!passwd)
    passwd="";
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  /* Store user into the buffer */
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  end= strmake(end, user, USERNAME_LENGTH) + 1;
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  /* write scrambled password according to server capabilities */
  if (passwd[0])
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  {
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    if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
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    {
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      *end++= SCRAMBLE_LENGTH;
      scramble(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH;
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    }
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    else
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    {
      scramble_323(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH_323 + 1;
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    }
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  }
  else
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    *end++= '\0';                               /* empty password */
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  /* Add database if needed */
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  end= strmake(end, db ? db : "", NAME_LEN) + 1;
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  /* Write authentication package */
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  simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (end-buff),1);
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  rc= (*mysql->methods->read_change_user_result)(mysql, buff, passwd);

  /*
    The server will close all statements no matter was the attempt
    to change user successful or not.
  */
  mysql_detach_stmt_list(&mysql->stmts);
  if (rc == 0)
  {
    /* Free old connect information */
    my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));

    /* alloc new connect information */
    mysql->user=  my_strdup(user,MYF(MY_WME));
    mysql->passwd=my_strdup(passwd,MYF(MY_WME));
    mysql->db=    db ? my_strdup(db,MYF(MY_WME)) : 0;
  }
  DBUG_RETURN(rc);
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}

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#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

#if defined(__NETWARE__)
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/* Default to value of USER on NetWare, if unset use "UNKNOWN_USER" */
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void read_user_name(char *name)
{
  char *str=getenv("USER");
  strmake(name, str ? str : "UNKNOWN_USER", USERNAME_LENGTH);
}

#elif !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)

void read_user_name(char *name)
{
  DBUG_ENTER("read_user_name");
  if (geteuid() == 0)
    (void) strmov(name,"root");		/* allow use of surun */
  else
  {
#ifdef HAVE_GETPWUID
    struct passwd *skr;
    const char *str;
    if ((str=getlogin()) == NULL)
    {
      if ((skr=getpwuid(geteuid())) != NULL)
	str=skr->pw_name;
      else if (!(str=getenv("USER")) && !(str=getenv("LOGNAME")) &&
	       !(str=getenv("LOGIN")))
	str="UNKNOWN_USER";
    }
    (void) strmake(name,str,USERNAME_LENGTH);
#elif HAVE_CUSERID
    (void) cuserid(name);
#else
    strmov(name,"UNKNOWN_USER");
#endif
  }
  DBUG_VOID_RETURN;
}

#else /* If MSDOS || VMS */

void read_user_name(char *name)
{
  char *str=getenv("USER");		/* ODBC will send user variable */
  strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}

#endif

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my_bool handle_local_infile(MYSQL *mysql, const char *net_filename)
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{
  my_bool result= 1;
  uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
  NET *net= &mysql->net;
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  int readcount;
  void *li_ptr;          /* pass state to local_infile functions */
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  char *buf;		/* buffer to be filled by local_infile_read */
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  struct st_mysql_options *options= &mysql->options;
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  DBUG_ENTER("handle_local_infile");

  /* check that we've got valid callback functions */
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  if (!(options->local_infile_init &&
	options->local_infile_read &&
	options->local_infile_end &&
	options->local_infile_error))
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  {
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    /* if any of the functions is invalid, set the default */
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    mysql_set_local_infile_default(mysql);
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  }

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  /* copy filename into local memory and allocate read buffer */
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  if (!(buf=my_malloc(packet_length, MYF(0))))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    strmov(net->last_error, ER(net->last_errno=CR_OUT_OF_MEMORY));
    DBUG_RETURN(1);
  }
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  /* initialize local infile (open file, usually) */
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  if ((*options->local_infile_init)(&li_ptr, net_filename,
    options->local_infile_userdata))
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  {
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    VOID(my_net_write(net,"",0));               /* Server needs one packet */
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    net_flush(net);
    strmov(net->sqlstate, unknown_sqlstate);
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    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
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    goto err;
  }

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  /* read blocks of data from local infile callback */
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  while ((readcount =
	  (*options->local_infile_read)(li_ptr, buf,
					packet_length)) > 0)
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  {
    if (my_net_write(net,buf,readcount))
    {
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      DBUG_PRINT("error",
		 ("Lost connection to MySQL server during LOAD DATA of local file"));
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      strmov(net->sqlstate, unknown_sqlstate);
      net->last_errno=CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));
      goto err;
    }
  }
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  /* Send empty packet to mark end of file */
  if (my_net_write(net,"",0) || net_flush(net))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    net->last_errno=CR_SERVER_LOST;
    sprintf(net->last_error,ER(net->last_errno),errno);
    goto err;
  }
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  if (readcount < 0)
  {
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    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
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    goto err;
  }
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  result=0;					/* Ok */

err:
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  /* free up memory allocated with _init, usually */
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  (*options->local_infile_end)(li_ptr);
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  my_free(buf, MYF(0));
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  DBUG_RETURN(result);
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}


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/****************************************************************************
  Default handlers for LOAD LOCAL INFILE
****************************************************************************/

typedef struct st_default_local_infile
{
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  int fd;
  int error_num;
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  const char *filename;
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  char error_msg[LOCAL_INFILE_ERROR_LEN];
} default_local_infile_data;


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/*
  Open file for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_init()
    ptr			Store pointer to internal data here
    filename		File name to open. This may be in unix format !


  NOTES
    Even if this function returns an error, the load data interface
    guarantees that default_local_infile_end() is called.

  RETURN
    0	ok
    1	error
*/

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static int default_local_infile_init(void **ptr, const char *filename,
             void *userdata __attribute__ ((unused)))
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{
  default_local_infile_data *data;
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  char tmp_name[FN_REFLEN];
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  if (!(*ptr= data= ((default_local_infile_data *)
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		     my_malloc(sizeof(default_local_infile_data),  MYF(0)))))
    return 1; /* out of memory */
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  data->error_msg[0]= 0;
  data->error_num=    0;
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  data->filename= filename;
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  fn_format(tmp_name, filename, "", "", MY_UNPACK_FILENAME);
  if ((data->fd = my_open(tmp_name, O_RDONLY, MYF(0))) < 0)
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  {
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    data->error_num= my_errno;
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    my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
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                EE(EE_FILENOTFOUND), tmp_name, data->error_num);
    return 1;
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  }
  return 0; /* ok */
}


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/*
  Read data for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_read()
    ptr			Points to handle allocated by _init
    buf			Read data here
    buf_len		Ammount of data to read

  RETURN
    > 0		number of bytes read
    == 0	End of data
    < 0		Error
*/

static int default_local_infile_read(void *ptr, char *buf, uint buf_len)
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{
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  int count;
  default_local_infile_data*data = (default_local_infile_data *) ptr;
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  if ((count= (int) my_read(data->fd, (byte *) buf, buf_len, MYF(0))) < 0)
  {
    data->error_num= EE_READ; /* the errmsg for not entire file read */
    my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
		EE(EE_READ),
		data->filename, my_errno);
  }
  return count;
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}


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/*
  Read data for LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_end()
    ptr			Points to handle allocated by _init
			May be NULL if _init failed!

  RETURN
*/

static void default_local_infile_end(void *ptr)
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{
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  default_local_infile_data *data= (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
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  {
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    if (data->fd >= 0)
      my_close(data->fd, MYF(MY_WME));
    my_free(ptr, MYF(MY_WME));
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  }
}


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/*
  Return error from LOAD LOCAL INFILE

  SYNOPSIS
    default_local_infile_end()
    ptr			Points to handle allocated by _init
			May be NULL if _init failed!
    error_msg		Store error text here
    error_msg_len	Max lenght of error_msg

  RETURN
    error message number
*/

static int
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default_local_infile_error(void *ptr, char *error_msg, uint error_msg_len)
{
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  default_local_infile_data *data = (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
  {
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    strmake(error_msg, data->error_msg, error_msg_len);
    return data->error_num;
  }
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  /* This can only happen if we got error on malloc of handle */
  strmov(error_msg, ER(CR_OUT_OF_MEMORY));
  return CR_OUT_OF_MEMORY;
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}


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void
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mysql_set_local_infile_handler(MYSQL *mysql,
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                               int (*local_infile_init)(void **, const char *,
                               void *),
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                               int (*local_infile_read)(void *, char *, uint),
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                               void (*local_infile_end)(void *),
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                               int (*local_infile_error)(void *, char *, uint),
                               void *userdata)
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{
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  mysql->options.local_infile_init=  local_infile_init;
  mysql->options.local_infile_read=  local_infile_read;
  mysql->options.local_infile_end=   local_infile_end;
  mysql->options.local_infile_error= local_infile_error;
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  mysql->options.local_infile_userdata = userdata;
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}


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void mysql_set_local_infile_default(MYSQL *mysql)
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{
  mysql->options.local_infile_init=  default_local_infile_init;
  mysql->options.local_infile_read=  default_local_infile_read;
  mysql->options.local_infile_end=   default_local_infile_end;
  mysql->options.local_infile_error= default_local_infile_error;
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}


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/**************************************************************************
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  Do a query. If query returned rows, free old rows.
  Read data by mysql_store_result or by repeat call of mysql_fetch_row
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**************************************************************************/

int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
  return mysql_real_query(mysql,query, (uint) strlen(query));
}

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static MYSQL* spawn_init(MYSQL* parent, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  MYSQL* child;
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  DBUG_ENTER("spawn_init");
  if (!(child= mysql_init(0)))
    DBUG_RETURN(0);

  child->options.user= my_strdup((user) ? user :
				 (parent->user ? parent->user :
				  parent->options.user), MYF(0));
  child->options.password= my_strdup((passwd) ? passwd :
				     (parent->passwd ?
				      parent->passwd :
				      parent->options.password), MYF(0));
  child->options.port= port;
  child->options.host= my_strdup((host) ? host :
				 (parent->host ?
				  parent->host :
				  parent->options.host), MYF(0));
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  if (parent->db)
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    child->options.db= my_strdup(parent->db, MYF(0));
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  else if (parent->options.db)
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    child->options.db= my_strdup(parent->options.db, MYF(0));
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  /*
    rpl_pivot is set to 1 in mysql_init();  Reset it as we are not doing
    replication here
  */
  child->rpl_pivot= 0;
  DBUG_RETURN(child);
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}


int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  if (mysql->master != mysql && !mysql->master->rpl_pivot)
    mysql_close(mysql->master);
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  if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  return 0;
}

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int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
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			unsigned int port,
			const char* user,
			const char* passwd)
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{
  MYSQL* slave;
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  if (!(slave = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  slave->next_slave = mysql->next_slave;
  mysql->next_slave = slave;
  return 0;
}

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/**************************************************************************
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  Return next field of the query results
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**************************************************************************/

MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
  if (result->current_field >= result->field_count)
    return(NULL);
  return &result->fields[result->current_field++];
}

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/**************************************************************************
  Move to a specific row and column
**************************************************************************/

void STDCALL
mysql_data_seek(MYSQL_RES *result, my_ulonglong row)
{
  MYSQL_ROWS	*tmp=0;
  DBUG_PRINT("info",("mysql_data_seek(%ld)",(long) row));
  if (result->data)
    for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
  result->current_row=0;
  result->data_cursor = tmp;
}


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/*************************************************************************
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  put the row or field cursor one a position one got from mysql_row_tell()
  This doesn't restore any data. The next mysql_fetch_row or
  mysql_fetch_field will return the next row or field after the last used
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*************************************************************************/

MYSQL_ROW_OFFSET STDCALL
mysql_row_seek(MYSQL_RES *result, MYSQL_ROW_OFFSET row)
{
  MYSQL_ROW_OFFSET return_value=result->data_cursor;
  result->current_row= 0;
  result->data_cursor= row;
  return return_value;
}


MYSQL_FIELD_OFFSET STDCALL
mysql_field_seek(MYSQL_RES *result, MYSQL_FIELD_OFFSET field_offset)
{
  MYSQL_FIELD_OFFSET return_value=result->current_field;
  result->current_field=field_offset;
  return return_value;
}

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/*****************************************************************************
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  List all databases
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_dbs(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_dbs");

  append_wild(strmov(buff,"show databases"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}


/*****************************************************************************
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  List all tables in a database
  If wild is given then only the tables matching wild is returned
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_tables(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_tables");

  append_wild(strmov(buff,"show tables"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}

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MYSQL_FIELD *cli_list_fields(MYSQL *mysql)
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{
  MYSQL_DATA *query;
  if (!(query= cli_read_rows(mysql,(MYSQL_FIELD*) 0, 
			     protocol_41(mysql) ? 8 : 6)))
    return NULL;

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  mysql->field_count= (uint) query->rows;
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  return unpack_fields(query,&mysql->field_alloc,
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		       mysql->field_count, 1, mysql->server_capabilities);
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}


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/**************************************************************************
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  List all fields in a table
  If wild is given then only the fields matching wild is returned
  Instead of this use query:
  show fields in 'table' like "wild"
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**************************************************************************/

MYSQL_RES * STDCALL
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mysql_list_fields(MYSQL *mysql, const char *table, const char *wild)
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{
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  MYSQL_RES   *result;
  MYSQL_FIELD *fields;
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  char	     buff[257],*end;
  DBUG_ENTER("mysql_list_fields");
  DBUG_PRINT("enter",("table: '%s'  wild: '%s'",table,wild ? wild : ""));

  end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
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  free_old_query(mysql);
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  if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
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      !(fields= (*mysql->methods->list_fields)(mysql)))
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    DBUG_RETURN(NULL);

  if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
					 MYF(MY_WME | MY_ZEROFILL))))
    DBUG_RETURN(NULL);
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  result->methods= mysql->methods;
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  result->field_alloc=mysql->field_alloc;
  mysql->fields=0;
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  result->field_count = mysql->field_count;
  result->fields= fields;
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  result->eof=1;
  DBUG_RETURN(result);
}

/* List all running processes (threads) in server */

MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
  MYSQL_DATA *fields;
  uint field_count;
  uchar *pos;
  DBUG_ENTER("mysql_list_processes");

  LINT_INIT(fields);
  if (simple_command(mysql,COM_PROCESS_INFO,0,0,0))
    DBUG_RETURN(0);
  free_old_query(mysql);
  pos=(uchar*) mysql->net.read_pos;
  field_count=(uint) net_field_length(&pos);
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  if (!(fields = (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*) 0,
					      protocol_41(mysql) ? 7 : 5)))
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    DBUG_RETURN(NULL);
  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
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				    mysql->server_capabilities)))
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    DBUG_RETURN(0);
  mysql->status=MYSQL_STATUS_GET_RESULT;
  mysql->field_count=field_count;
  DBUG_RETURN(mysql_store_result(mysql));
}

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#ifdef USE_OLD_FUNCTIONS
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int  STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_createdb");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
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}


int  STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_drop_db");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
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}
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#endif
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int STDCALL
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mysql_shutdown(MYSQL *mysql, enum mysql_enum_shutdown_level shutdown_level)
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{
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  uchar level[1];
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  DBUG_ENTER("mysql_shutdown");
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  level[0]= (uchar) shutdown_level;
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  DBUG_RETURN(simple_command(mysql, COM_SHUTDOWN, (char *)level, 1, 0));
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}


int STDCALL
mysql_refresh(MYSQL *mysql,uint options)
{
  uchar bits[1];
  DBUG_ENTER("mysql_refresh");
  bits[0]= (uchar) options;
  DBUG_RETURN(simple_command(mysql,COM_REFRESH,(char*) bits,1,0));
}

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int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
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  char buff[4];
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  DBUG_ENTER("mysql_kill");
  int4store(buff,pid);
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  DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,sizeof(buff),0));
}


int STDCALL
mysql_set_server_option(MYSQL *mysql, enum enum_mysql_set_option option)
{
  char buff[2];
  DBUG_ENTER("mysql_set_server_option");
  int2store(buff, (uint) option);
  DBUG_RETURN(simple_command(mysql, COM_SET_OPTION, buff, sizeof(buff), 0));
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}


int STDCALL
mysql_dump_debug_info(MYSQL *mysql)
{
  DBUG_ENTER("mysql_dump_debug_info");
  DBUG_RETURN(simple_command(mysql,COM_DEBUG,0,0,0));
}

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const char *cli_read_statistics(MYSQL *mysql)
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{
  mysql->net.read_pos[mysql->packet_length]=0;	/* End of stat string */
  if (!mysql->net.read_pos[0])
  {
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    strmov(mysql->net.sqlstate, unknown_sqlstate);
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    mysql->net.last_errno=CR_WRONG_HOST_INFO;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    return mysql->net.last_error;
  }
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  return (char*) mysql->net.read_pos;
}

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const char * STDCALL
mysql_stat(MYSQL *mysql)
{
  DBUG_ENTER("mysql_stat");
  if (simple_command(mysql,COM_STATISTICS,0,0,0))
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    DBUG_RETURN(mysql->net.last_error);
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  DBUG_RETURN((*mysql->methods->read_statistics)(mysql));
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}


int STDCALL
mysql_ping(MYSQL *mysql)
{
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  int res;
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  DBUG_ENTER("mysql_ping");
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  res= simple_command(mysql,COM_PING,0,0,0);
  if (res == CR_SERVER_LOST && mysql->reconnect)
    res= simple_command(mysql,COM_PING,0,0,0);
  DBUG_RETURN(res);
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}


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const char * STDCALL
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mysql_get_server_info(MYSQL *mysql)
{
  return((char*) mysql->server_version);
}


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const char * STDCALL
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mysql_get_host_info(MYSQL *mysql)
{
  return(mysql->host_info);
}


uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
  return (mysql->protocol_version);
}

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const char * STDCALL
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mysql_get_client_info(void)
{
  return (char*) MYSQL_SERVER_VERSION;
}

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ulong STDCALL mysql_get_client_version(void)
{
  return MYSQL_VERSION_ID;
}

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my_bool STDCALL mysql_eof(MYSQL_RES *res)
{
  return res->eof;
}

MYSQL_FIELD * STDCALL mysql_fetch_field_direct(MYSQL_RES *res,uint fieldnr)
{
  return &(res)->fields[fieldnr];
}

MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res)
{
  return (res)->fields;
}

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MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
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{
  return res->data_cursor;
}

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MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
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{
  return (res)->current_field;
}

/* MYSQL */

unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
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  return mysql->last_used_con->field_count;
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}

my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
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  return mysql->last_used_con->affected_rows;
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}

my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
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  return mysql->last_used_con->insert_id;
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}

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const char *STDCALL mysql_sqlstate(MYSQL *mysql)
{
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  return mysql ? mysql->net.sqlstate : cant_connect_sqlstate;
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}

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uint STDCALL mysql_warning_count(MYSQL *mysql)
{
  return mysql->warning_count;
}

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const char *STDCALL mysql_info(MYSQL *mysql)
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{
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  return mysql->info;
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}

ulong STDCALL mysql_thread_id(MYSQL *mysql)
{
  return (mysql)->thread_id;
}

const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
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  return mysql->charset->csname;
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}

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void STDCALL mysql_get_character_set_info(MYSQL *mysql, MY_CHARSET_INFO *csinfo)
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{
  csinfo->number   = mysql->charset->number;
  csinfo->state    = mysql->charset->state;
  csinfo->csname   = mysql->charset->csname;
  csinfo->name     = mysql->charset->name;
  csinfo->comment  = mysql->charset->comment;
  csinfo->mbminlen = mysql->charset->mbminlen;
  csinfo->mbmaxlen = mysql->charset->mbmaxlen;

  if (mysql->options.charset_dir)
    csinfo->dir = mysql->options.charset_dir;
  else
    csinfo->dir = charsets_dir;
}
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uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

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my_bool STDCALL mysql_embedded(void)
{
#ifdef EMBEDDED_LIBRARY
  return 1;
#else
  return 0;
#endif
}

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/****************************************************************************
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  Some support functions
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****************************************************************************/

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/*
  Functions called my my_net_init() to set some application specific variables
*/

void my_net_local_init(NET *net)
{
  net->max_packet=   (uint) net_buffer_length;
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  my_net_set_read_timeout(net, CLIENT_NET_READ_TIMEOUT);
  my_net_set_write_timeout(net, CLIENT_NET_WRITE_TIMEOUT);
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  net->retry_count=  1;
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  net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}

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/*
  This function is used to create HEX string that you
  can use in a SQL statement in of the either ways:
    INSERT INTO blob_column VALUES (0xAABBCC);  (any MySQL version)
    INSERT INTO blob_column VALUES (X'AABBCC'); (4.1 and higher)
  
  The string in "from" is encoded to a HEX string.
  The result is placed in "to" and a terminating null byte is appended.
  
  The string pointed to by "from" must be "length" bytes long.
  You must allocate the "to" buffer to be at least length*2+1 bytes long.
  Each character needs two bytes, and you need room for the terminating
  null byte. When mysql_hex_string() returns, the contents of "to" will
  be a null-terminated string. The return value is the length of the
  encoded string, not including the terminating null character.

  The return value does not contain any leading 0x or a leading X' and
  trailing '. The caller must supply whichever of those is desired.
*/

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ulong STDCALL
mysql_hex_string(char *to, const char *from, ulong length)
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{
  char *to0= to;
  const char *end;
            
  for (end= from + length; from < end; from++)
  {
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    *to++= _dig_vec_upper[((unsigned char) *from) >> 4];
    *to++= _dig_vec_upper[((unsigned char) *from) & 0x0F];
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  }
  *to= '\0';
  return (ulong) (to-to0);
}

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/*
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  Add escape characters to a string (blob?) to make it suitable for a insert
  to should at least have place for length*2+1 chars
  Returns the length of the to string
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*/

ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
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  return escape_string_for_mysql(default_charset_info, to, 0, from, length);
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}

ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
			 ulong length)
{
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  if (mysql->server_status & SERVER_STATUS_NO_BACKSLASH_ESCAPES)
    return escape_quotes_for_mysql(mysql->charset, to, 0, from, length);
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  return escape_string_for_mysql(mysql->charset, to, 0, from, length);
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}

void STDCALL
myodbc_remove_escape(MYSQL *mysql,char *name)
{
  char *to;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
  char *end;
  LINT_INIT(end);
  if (use_mb_flag)
    for (end=name; *end ; end++) ;
#endif

  for (to=name ; *name ; name++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar( mysql->charset, name , end ) ) )
    {
      while (l--)
	*to++ = *name++;
      name--;
      continue;
    }
#endif
    if (*name == '\\' && name[1])
      name++;
    *to++= *name;
  }
  *to=0;
}
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/********************************************************************
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 Implementation of new client API for 4.1 version.
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 mysql_stmt_* are real prototypes used by applications.
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 To make API work in embedded library all functions performing
 real I/O are prefixed with 'cli_' (abbreviated from 'Call Level
 Interface'). This functions are invoked via pointers set in
 MYSQL::methods structure. Embedded counterparts, prefixed with
 'emb_' reside in libmysqld/lib_sql.cc.
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*********************************************************************/

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/******************* Declarations ***********************************/
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/* Default number of rows fetched per one COM_STMT_FETCH command. */
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#define DEFAULT_PREFETCH_ROWS (ulong) 1
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/*
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  These functions are called by function pointer MYSQL_STMT::read_row_func.
  Each function corresponds to one of the read methods:
  - mysql_stmt_fetch without prior mysql_stmt_store_result,
  - mysql_stmt_fetch when result is stored,
  - mysql_stmt_fetch when there are no rows (always returns MYSQL_NO_DATA)
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*/

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static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row);
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static int stmt_read_row_from_cursor(MYSQL_STMT *stmt, unsigned char **row);
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static int stmt_read_row_no_data(MYSQL_STMT *stmt, unsigned char **row);
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static int stmt_read_row_no_result_set(MYSQL_STMT *stmt, unsigned char **row);
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/*
  This function is used in mysql_stmt_store_result if
  STMT_ATTR_UPDATE_MAX_LENGTH attribute is set.
*/
static void stmt_update_metadata(MYSQL_STMT *stmt, MYSQL_ROWS *data);
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static my_bool setup_one_fetch_function(MYSQL_BIND *, MYSQL_FIELD *field);
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/* Auxilary function used to reset statement handle. */

#define RESET_SERVER_SIDE 1
#define RESET_LONG_DATA 2
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#define RESET_STORE_RESULT 4
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static my_bool reset_stmt_handle(MYSQL_STMT *stmt, uint flags);

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/*
  Maximum sizes of MYSQL_TYPE_DATE, MYSQL_TYPE_TIME, MYSQL_TYPE_DATETIME
  values stored in network buffer.
*/

/* 1 (length) + 2 (year) + 1 (month) + 1 (day) */
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#define MAX_DATE_REP_LENGTH 5
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/*
  1 (length) + 1 (is negative) + 4 (day count) + 1 (hour)
  + 1 (minute) + 1 (seconds) + 4 (microseconds)
*/
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#define MAX_TIME_REP_LENGTH 13
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/*
  1 (length) + 2 (year) + 1 (month) + 1 (day) +
  1 (hour) + 1 (minute) + 1 (second) + 4 (microseconds)
*/
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#define MAX_DATETIME_REP_LENGTH 12
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#define MAX_DOUBLE_STRING_REP_LENGTH 331
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/* A macro to check truncation errors */

#define IS_TRUNCATED(value, is_unsigned, min, max, umax) \
        ((is_unsigned) ? (((value) > (umax) || (value) < 0) ? 1 : 0) : \
                         (((value) > (max)  || (value) < (min)) ? 1 : 0))

#define BIND_RESULT_DONE 1
/*
  We report truncations only if at least one of MYSQL_BIND::error
  pointers is set. In this case stmt->bind_result_done |-ed with
  this flag.
*/
#define REPORT_DATA_TRUNCATION 2

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/**************** Misc utility functions ****************************/
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/*
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  Reallocate the NET package to have at least length bytes available.
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  SYNPOSIS
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    my_realloc_str()
    net                 The NET structure to modify.
    length              Ensure that net->buff has space for at least
                        this number of bytes.
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  RETURN VALUES
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    0   Success.
    1   Error, i.e. out of memory or requested packet size is bigger
        than max_allowed_packet. The error code is stored in net->last_errno.
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*/

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static my_bool my_realloc_str(NET *net, ulong length)
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{
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  ulong buf_length= (ulong) (net->write_pos - net->buff);
  my_bool res=0;
  DBUG_ENTER("my_realloc_str");
  if (buf_length + length > net->max_packet)
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  {
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    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
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  }
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  DBUG_RETURN(res);
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}


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/* Clear possible error statee of struct NET */

static void net_clear_error(NET *net)
{
  if (net->last_errno)
  {
    net->last_errno= 0;
    net->last_error[0]= '\0';
    strmov(net->sqlstate, not_error_sqlstate);
  }
}

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static void stmt_clear_error(MYSQL_STMT *stmt)
{
  if (stmt->last_errno)
  {
    stmt->last_errno= 0;
    stmt->last_error[0]= '\0';
    strmov(stmt->sqlstate, not_error_sqlstate);
  }
}

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/*
  Set statement error code, sqlstate, and error message
  from given errcode and sqlstate.
*/

static void set_stmt_error(MYSQL_STMT * stmt, int errcode,
                           const char *sqlstate)
{
  DBUG_ENTER("set_stmt_error");
  DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
  DBUG_ASSERT(stmt != 0);

  stmt->last_errno= errcode;
  strmov(stmt->last_error, ER(errcode));
  strmov(stmt->sqlstate, sqlstate);

  DBUG_VOID_RETURN;
}


/*
  Set statement error code, sqlstate, and error message.
*/

void set_stmt_errmsg(MYSQL_STMT * stmt, const char *err, int errcode,
                     const char *sqlstate)
{
  DBUG_ENTER("set_stmt_errmsg");
  DBUG_PRINT("enter", ("error: %d/%s '%s'", errcode, sqlstate, err));
  DBUG_ASSERT(stmt != 0);

  stmt->last_errno= errcode;
  if (err && err[0])
    strmov(stmt->last_error, err);
  strmov(stmt->sqlstate, sqlstate);

  DBUG_VOID_RETURN;
}
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/*
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  Read and unpack server reply to COM_STMT_PREPARE command (sent from
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  mysql_stmt_prepare).
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  SYNOPSIS
    cli_read_prepare_result()
    mysql   connection handle
    stmt    statement handle
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  RETURN VALUES
    0	ok
    1	error
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*/

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my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
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{
  uchar *pos;
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  uint field_count, param_count;
  ulong packet_length;
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  MYSQL_DATA *fields_data;
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  DBUG_ENTER("cli_read_prepare_result");
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  mysql= mysql->last_used_con;
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  if ((packet_length= cli_safe_read(mysql)) == packet_error)
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    DBUG_RETURN(1);
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  mysql->warning_count= 0;
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  pos= (uchar*) mysql->net.read_pos;
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  stmt->stmt_id= uint4korr(pos+1); pos+= 5;
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  /* Number of columns in result set */
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  field_count=   uint2korr(pos);   pos+= 2;
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  /* Number of placeholders in the statement */
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  param_count=   uint2korr(pos);   pos+= 2;
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  if (packet_length >= 12)
    mysql->warning_count= uint2korr(pos+1);
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  if (param_count != 0)
  {
    MYSQL_DATA *param_data;

    /* skip parameters data: we don't support it yet */
    if (!(param_data= (*mysql->methods->read_rows)(mysql, (MYSQL_FIELD*)0, 7)))
      DBUG_RETURN(1);
    free_rows(param_data);
  }

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  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
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    if (!(fields_data= (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*)0,7)))
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      DBUG_RETURN(1);
    if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
				      field_count,0,
				      mysql->server_capabilities)))
      DBUG_RETURN(1);
  }
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  stmt->field_count=  field_count;
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  stmt->param_count=  (ulong) param_count;
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  DBUG_PRINT("exit",("field_count: %u  param_count: %u  warning_count: %u",
                     field_count, param_count, (uint) mysql->warning_count));
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  DBUG_RETURN(0);
}


/*
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  Allocate memory and init prepared statement structure.

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  SYNOPSIS
    mysql_stmt_init()
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    mysql   connection handle

  DESCRIPTION
    This is an entry point of the new API. Returned handle stands for
    a server-side prepared statement. Memory for this structure (~700
    bytes) is allocated using 'malloc'. Once created, the handle can be
    reused many times. Created statement handle is bound to connection
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    handle provided to this call: its lifetime is limited by lifetime
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    of connection.
    'mysql_stmt_init()' is a pure local call, server side structure is
    created only in mysql_stmt_prepare.
    Next steps you may want to make:
    - set a statement attribute (mysql_stmt_attr_set()),
    - prepare statement handle with a query (mysql_stmt_prepare()),
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    - close statement handle and free its memory (mysql_stmt_close()),
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    - reset statement with mysql_stmt_reset() (a no-op which will
      just return).
    Behaviour of the rest of API calls on this statement is not defined yet
    (though we're working on making each wrong call sequence return
    error).
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  RETURN VALUE
    statement structure upon success and NULL if out of
    memory
*/

MYSQL_STMT * STDCALL
mysql_stmt_init(MYSQL *mysql)
{
  MYSQL_STMT *stmt;
  DBUG_ENTER("mysql_stmt_init");

  if (!(stmt= (MYSQL_STMT *) my_malloc(sizeof(MYSQL_STMT),
                                       MYF(MY_WME | MY_ZEROFILL))))
  {
    set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }

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  init_alloc_root(&stmt->mem_root, 2048, 2048);
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  init_alloc_root(&stmt->result.alloc, 4096, 4096);
  stmt->result.alloc.min_malloc= sizeof(MYSQL_ROWS);
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  mysql->stmts= list_add(mysql->stmts, &stmt->list);
  stmt->list.data= stmt;
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  stmt->state= MYSQL_STMT_INIT_DONE;
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  stmt->mysql= mysql;
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  stmt->read_row_func= stmt_read_row_no_result_set;
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  stmt->prefetch_rows= DEFAULT_PREFETCH_ROWS;
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  strmov(stmt->sqlstate, not_error_sqlstate);
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  /* The rest of statement members was bzeroed inside malloc */
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  DBUG_RETURN(stmt);
}

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/*
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  Prepare server side statement with query.

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  SYNOPSIS
    mysql_stmt_prepare()
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    stmt    statement handle
    query   statement to prepare
    length  statement length
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  DESCRIPTION
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    Associate statement with statement handle. This is done both on
    client and server sides. At this point the server parses given query
    and creates an internal structure to represent it.
    Next steps you may want to make:
    - find out if this statement returns a result set by
      calling mysql_stmt_field_count(), and get result set metadata
      with mysql_stmt_result_metadata(),
    - if query contains placeholders, bind input parameters to placeholders
      using mysql_stmt_bind_param(),
    - otherwise proceed directly to mysql_stmt_execute().

  IMPLEMENTATION NOTES
  - if this is a re-prepare of the statement, first close previous data
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    structure on the server and free old statement data
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  - then send the query to server and get back number of placeholders,
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    number of columns in result set (if any), and result set metadata.
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    At the same time allocate memory for input and output parameters
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    to have less checks in mysql_stmt_bind_{param, result}.
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  RETURN VALUES
    0  success
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   !0  error
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*/

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int STDCALL
mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query, ulong length)
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{
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  MYSQL *mysql= stmt->mysql;
  DBUG_ENTER("mysql_stmt_prepare");

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  if (!mysql)
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  {
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    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
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  /*
    Reset the last error in any case: that would clear the statement
    if the previous prepare failed.
  */
  stmt->last_errno= 0;
  stmt->last_error[0]= '\0';

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  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    /* This is second prepare with another statement */
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    char buff[MYSQL_STMT_HEADER];               /* 4 bytes - stmt id */
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    if (reset_stmt_handle(stmt, RESET_LONG_DATA | RESET_STORE_RESULT))
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      DBUG_RETURN(1);
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    /*
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      These members must be reset for API to
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      function in case of error or misuse.
    */
    stmt->bind_param_done= stmt->bind_result_done= FALSE;
    stmt->param_count= stmt->field_count= 0;
    free_root(&stmt->mem_root, MYF(MY_KEEP_PREALLOC));

    int4store(buff, stmt->stmt_id);
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    /*
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      Close statement in server

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      If there was a 'use' result from another statement, or from
      mysql_use_result it won't be freed in mysql_stmt_free_result and
      we should get 'Commands out of sync' here.
    */
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    stmt->state= MYSQL_STMT_INIT_DONE;
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    if (stmt_command(mysql, COM_STMT_CLOSE, buff, 4, stmt))
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    {
      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                      mysql->net.sqlstate);
      DBUG_RETURN(1);
    }
  }

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  if (stmt_command(mysql, COM_STMT_PREPARE, query, length, stmt))
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  {
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    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
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  }

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  if ((*mysql->methods->read_prepare_result)(mysql, stmt))
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  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
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    DBUG_RETURN(1);
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  }
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  /*
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    alloc_root will return valid address even in case when param_count
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    and field_count are zero. Thus we should never rely on stmt->bind
    or stmt->params when checking for existence of placeholders or
    result set.
  */
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  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
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                                                (stmt->param_count +
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                                                 stmt->field_count))))
  {
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
  stmt->bind= stmt->params + stmt->param_count;
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  stmt->state= MYSQL_STMT_PREPARE_DONE;
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  DBUG_PRINT("info", ("Parameter count: %u", stmt->param_count));
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  DBUG_RETURN(0);
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}

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/*
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  Get result set metadata from reply to mysql_stmt_execute.
  This is used mainly for SHOW commands, as metadata for these
  commands is sent only with result set.
  To be removed when all commands will fully support prepared mode.
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*/

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static unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
2082
{
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  MYSQL_FIELD *fields, *field, *end;
  MEM_ROOT *alloc= &stmt->mem_root;
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  MYSQL *mysql= stmt->mysql->last_used_con;
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2087
  stmt->field_count= mysql->field_count;
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  /*
2090
    Get the field information for non-select statements
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    like SHOW and DESCRIBE commands
  */
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  if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc,
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						 sizeof(MYSQL_FIELD) *
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						 stmt->field_count)) ||
      !(stmt->bind= (MYSQL_BIND *) alloc_root(alloc,
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					      sizeof(MYSQL_BIND) *
					      stmt->field_count)))
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    return 0;
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  for (fields= mysql->fields, end= fields+stmt->field_count,
2102
	 field= stmt->fields;
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       field && fields < end; fields++, field++)
  {
    field->db       = strdup_root(alloc,fields->db);
    field->table    = strdup_root(alloc,fields->table);
    field->org_table= strdup_root(alloc,fields->org_table);
    field->name     = strdup_root(alloc,fields->name);
    field->org_name = strdup_root(alloc,fields->org_name);
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    field->charsetnr= fields->charsetnr;
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    field->length   = fields->length;
    field->type     = fields->type;
    field->flags    = fields->flags;
    field->decimals = fields->decimals;
    field->def      = fields->def ? strdup_root(alloc,fields->def): 0;
    field->max_length= 0;
  }
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  return stmt->field_count;
}
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/*
  Update result set columns metadata if it was sent again in
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  reply to COM_STMT_EXECUTE.
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*/

static void update_stmt_fields(MYSQL_STMT *stmt)
{
  MYSQL_FIELD *field= stmt->mysql->fields;
  MYSQL_FIELD *field_end= field + stmt->field_count;
  MYSQL_FIELD *stmt_field= stmt->fields;
2132
  MYSQL_BIND *my_bind= stmt->bind_result_done ? stmt->bind : 0;
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142

  DBUG_ASSERT(stmt->field_count == stmt->mysql->field_count);

  for (; field < field_end; ++field, ++stmt_field)
  {
    stmt_field->charsetnr= field->charsetnr;
    stmt_field->length   = field->length;
    stmt_field->type     = field->type;
    stmt_field->flags    = field->flags;
    stmt_field->decimals = field->decimals;
2143
    if (my_bind)
2144 2145
    {
      /* Ignore return value: it should be 0 if bind_result succeeded. */
2146
      (void) setup_one_fetch_function(my_bind++, stmt_field);
2147
    }
2148 2149 2150
  }
}

2151
/*
2152 2153 2154 2155 2156 2157 2158 2159 2160
  Returns prepared statement metadata in the form of a result set.

  SYNOPSIS
    mysql_stmt_result_metadata()
    stmt  statement handle

  DESCRIPTION
    This function should be used after mysql_stmt_execute().
    You can safely check that prepared statement has a result set by calling
2161
    mysql_stmt_field_count(): if number of fields is not zero, you can call
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    this function to get fields metadata.
    Next steps you may want to make:
    - find out number of columns in result set by calling
      mysql_num_fields(res) (the same value is returned by
2166
      mysql_stmt_field_count())
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    - fetch metadata for any column with mysql_fetch_field,
      mysql_fetch_field_direct, mysql_fetch_fields, mysql_field_seek.
    - free returned MYSQL_RES structure with mysql_free_result.
    - proceed to binding of output parameters.
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  RETURN
    NULL  statement contains no result set or out of memory.
          In the latter case you can retreive error message
          with mysql_stmt_error.
    MYSQL_RES  a result set with no rows
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*/

MYSQL_RES * STDCALL
2180
mysql_stmt_result_metadata(MYSQL_STMT *stmt)
2181 2182
{
  MYSQL_RES *result;
2183
  DBUG_ENTER("mysql_stmt_result_metadata");
2184

2185 2186 2187 2188 2189 2190 2191 2192 2193
  /*
    stmt->fields is only defined if stmt->field_count is not null;
    stmt->field_count is initialized in prepare.
  */
  if (!stmt->field_count)
     DBUG_RETURN(0);

  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result),
                                      MYF(MY_WME | MY_ZEROFILL))))
2194
  {
2195 2196 2197
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }
2198

2199 2200
  result->methods=	stmt->mysql->methods;
  result->eof=		1;                      /* Marker for buffered */
2201 2202
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
2203
  /* The rest of members of 'result' was bzeroed inside malloc */
2204
  DBUG_RETURN(result);
2205 2206
}

2207

2208
/*
2209 2210
  Returns parameter columns meta information in the form of
  result set.
2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223

  SYNOPSYS
    mysql_stmt_param_metadata()
    stmt    statement handle

  DESCRIPTION
    This function can be called after you prepared the statement handle
    with mysql_stmt_prepare().
    XXX: not implemented yet.

  RETURN
    MYSQL_RES on success, 0 if there is no metadata.
    Currently this function always returns 0.
2224 2225 2226
*/

MYSQL_RES * STDCALL
2227
mysql_stmt_param_metadata(MYSQL_STMT *stmt)
2228
{
2229
  DBUG_ENTER("mysql_stmt_param_metadata");
2230

2231 2232 2233 2234
  if (!stmt->param_count)
    DBUG_RETURN(0);

  /*
2235 2236
    TODO: Fix this when server sends the information.
    Till then keep a dummy prototype.
2237 2238 2239 2240 2241
  */
  DBUG_RETURN(0); 
}


2242 2243 2244 2245 2246 2247 2248 2249 2250 2251
/* Store type of parameter in network buffer. */

static void store_param_type(char **pos, MYSQL_BIND *param)
{
  uint typecode= param->buffer_type | (param->is_unsigned ? 32768 : 0);
  int2store(*pos, typecode);
  *pos+= 2;
}


2252 2253
/*
  Functions to store parameter data in network packet.
2254

2255 2256 2257 2258 2259
  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

2260
  DESCRIPTION
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    These funtions are invoked from mysql_stmt_execute() by
    MYSQL_BIND::store_param_func pointer. This pointer is set once per
    many executions in mysql_stmt_bind_param(). The caller must ensure
    that network buffer have enough capacity to store parameter
    (MYSQL_BIND::buffer_length contains needed number of bytes).
2266
*/
2267 2268 2269

static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
2270
  *(net->write_pos++)= *(uchar *) param->buffer;
2271 2272
}

2273 2274 2275 2276 2277 2278
static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
2279

2280
static void store_param_int32(NET *net, MYSQL_BIND *param)
2281
{
2282 2283 2284 2285
  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
2286

2287 2288 2289 2290 2291 2292
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
2293

2294 2295 2296 2297 2298
static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
2299 2300
}

2301 2302 2303 2304 2305 2306
static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
2307

2308 2309 2310
static void store_param_time(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
2311
  char buff[MAX_TIME_REP_LENGTH], *pos;
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  uint length;

  pos= buff+1;
  pos[0]= tm->neg ? 1: 0;
  int4store(pos+1, tm->day);
  pos[5]= (uchar) tm->hour;
  pos[6]= (uchar) tm->minute;
  pos[7]= (uchar) tm->second;
  int4store(pos+8, tm->second_part);
  if (tm->second_part)
2322
    length= 12;
2323 2324 2325 2326
  else if (tm->hour || tm->minute || tm->second || tm->day)
    length= 8;
  else
    length= 0;
2327
  buff[0]= (char) length++;
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  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
2334
  char buff[MAX_DATETIME_REP_LENGTH], *pos;
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  uint length;

  pos= buff+1;

  int2store(pos, tm->year);
  pos[2]= (uchar) tm->month;
  pos[3]= (uchar) tm->day;
  pos[4]= (uchar) tm->hour;
  pos[5]= (uchar) tm->minute;
  pos[6]= (uchar) tm->second;
  int4store(pos+7, tm->second_part);
  if (tm->second_part)
    length= 11;
  else if (tm->hour || tm->minute || tm->second)
    length= 7;
  else if (tm->year || tm->month || tm->day)
    length= 4;
  else
    length= 0;
2354
  buff[0]= (char) length++;
2355 2356 2357 2358 2359 2360
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void store_param_date(NET *net, MYSQL_BIND *param)
{
2361 2362 2363
  MYSQL_TIME tm= *((MYSQL_TIME *) param->buffer);
  tm.hour= tm.minute= tm.second= tm.second_part= 0;
  net_store_datetime(net, &tm);
2364 2365 2366 2367 2368 2369 2370
}

static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  net_store_datetime(net, tm);
}
2371

2372
static void store_param_str(NET *net, MYSQL_BIND *param)
2373
{
2374 2375
  /* param->length is always set in mysql_stmt_bind_param */
  ulong length= *param->length;
2376 2377
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
2378
  net->write_pos= (uchar*) to+length;
2379 2380
}

2381

2382
/*
2383 2384 2385 2386 2387 2388 2389 2390 2391
  Mark if the parameter is NULL.

  SYNOPSIS
    store_param_null()
    net			MySQL NET connection
    param		MySQL bind param

  DESCRIPTION
    A data package starts with a string of bits where we set a bit
2392 2393
    if a parameter is NULL. Unlike bit string in result set row, here
    we don't have reserved bits for OK/error packet.
2394 2395
*/

2396
static void store_param_null(NET *net, MYSQL_BIND *param)
2397
{
2398
  uint pos= param->param_number;
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2399
  net->buff[pos/8]|=  (uchar) (1 << (pos & 7));
2400
}
2401 2402 2403


/*
2404 2405 2406
  Store one parameter in network packet: data is read from
  client buffer and saved in network packet by means of one
  of store_param_xxxx functions.
2407 2408
*/

2409
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
2410
{
2411
  NET *net= &stmt->mysql->net;
2412
  DBUG_ENTER("store_param");
2413
  DBUG_PRINT("enter",("type: %d  buffer: 0x%lx  length: %lu  is_null: %d",
2414
		      param->buffer_type,
2415 2416
		      (long) (param->buffer ? param->buffer : NullS),
                      *param->length, *param->is_null));
2417 2418

  if (*param->is_null)
2419 2420
    store_param_null(net, param);
  else
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2421
  {
2422 2423
    /*
      Param->length should ALWAYS point to the correct length for the type
2424
      Either to the length pointer given by the user or param->buffer_length
2425
    */
2426
    if ((my_realloc_str(net, *param->length)))
2427
    {
2428
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
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venu@myvenu.com committed
2429
      DBUG_RETURN(1);
2430
    }
2431
    (*param->store_param_func)(net, param);
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2432 2433
  }
  DBUG_RETURN(0);
2434 2435
}

2436

2437
/*
2438
  Auxilary function to send COM_STMT_EXECUTE packet to server and read reply.
2439
  Used from cli_stmt_execute, which is in turn used by mysql_stmt_execute.
2440 2441
*/

2442
static my_bool execute(MYSQL_STMT *stmt, char *packet, ulong length)
2443
{
2444 2445
  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
2446
  char buff[4 /* size of stmt id */ +
2447
            5 /* execution flags */];
2448 2449
  my_bool res;

2450
  DBUG_ENTER("execute");
2451
  DBUG_DUMP("packet", packet, length);
2452

2453 2454
  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
2455
  buff[4]= (char) stmt->flags;
2456
  int4store(buff+5, 1);                         /* iteration count */
2457

2458
  res= test(cli_advanced_command(mysql, COM_STMT_EXECUTE, buff, sizeof(buff),
2459 2460 2461
                                 packet, length, 1, NULL) ||
            (*mysql->methods->read_query_result)(mysql));
  stmt->affected_rows= mysql->affected_rows;
2462
  stmt->server_status= mysql->server_status;
2463 2464
  stmt->insert_id= mysql->insert_id;
  if (res)
2465
  {
2466
    set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
2467
    DBUG_RETURN(1);
2468 2469 2470 2471
  }
  DBUG_RETURN(0);
}

2472 2473

int cli_stmt_execute(MYSQL_STMT *stmt)
2474
{
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SCRUM  
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2475
  DBUG_ENTER("cli_stmt_execute");
2476 2477 2478

  if (stmt->param_count)
  {
2479 2480
    MYSQL *mysql= stmt->mysql;
    NET        *net= &mysql->net;
2481
    MYSQL_BIND *param, *param_end;
2482
    char       *param_data;
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2483 2484 2485
    ulong length;
    uint null_count;
    my_bool    result;
2486

2487 2488 2489 2490 2491
    if (!stmt->bind_param_done)
    {
      set_stmt_error(stmt, CR_PARAMS_NOT_BOUND, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2492 2493
    if (mysql->status != MYSQL_STATUS_READY ||
        mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
2494 2495 2496 2497
    {
      set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2498

2499 2500 2501
    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
2502 2503 2504 2505 2506
    if (my_realloc_str(net, null_count + 1))
    {
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2507 2508 2509 2510 2511
    bzero((char*) net->write_pos, null_count);
    net->write_pos+= null_count;
    param_end= stmt->params + stmt->param_count;

    /* In case if buffers (type) altered, indicate to server */
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2512 2513
    *(net->write_pos)++= (uchar) stmt->send_types_to_server;
    if (stmt->send_types_to_server)
2514
    {
2515 2516 2517 2518 2519
      if (my_realloc_str(net, 2 * stmt->param_count))
      {
        set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
        DBUG_RETURN(1);
      }
2520 2521 2522 2523 2524
      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
2525
        store_param_type((char**) &net->write_pos, param);
2526 2527 2528
    }

    for (param= stmt->params; param < param_end; param++)
2529
    {
2530
      /* check if mysql_stmt_send_long_data() was used */
2531 2532
      if (param->long_data_used)
	param->long_data_used= 0;	/* Clear for next execute call */
2533
      else if (store_param(stmt, param))
2534
	DBUG_RETURN(1);
2535
    }
2536 2537
    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
2538
    if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
2539
    {
2540
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2541
      DBUG_RETURN(1);
2542
    }
2543
    result= execute(stmt, param_data, length);
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2544
    stmt->send_types_to_server=0;
2545
    my_free(param_data, MYF(MY_WME));
2546 2547 2548
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
2549 2550
}

2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564
/*
  Read one row from buffered result set.  Result set is created by prior
  call to mysql_stmt_store_result().
  SYNOPSIS
    stmt_read_row_buffered()

  RETURN VALUE
    0             - success; *row is set to valid row pointer (row data
                    is stored in result set buffer)
    MYSQL_NO_DATA - end of result set. *row is set to NULL
*/

static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row)
{
2565
  if (stmt->data_cursor)
2566
  {
2567 2568
    *row= (uchar *) stmt->data_cursor->data;
    stmt->data_cursor= stmt->data_cursor->next;
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    return 0;
  }
  *row= 0;
  return MYSQL_NO_DATA;
}

/*
  Read one row from network: unbuffered non-cursor fetch.
  If last row was read, or error occured, erase this statement
  from record pointing to object unbuffered fetch is performed from.

  SYNOPSIS
    stmt_read_row_unbuffered()
    stmt  statement handle
    row   pointer to write pointer to row data;

  RETURN VALUE
    0           - success; *row contains valid address of a row;
                  row data is stored in network buffer
    1           - error; error code is written to
2589
                  stmt->last_{errno,error}; *row is not changed
2590
  MYSQL_NO_DATA - end of file was read from network;
2591
                  *row is set to NULL
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*/

static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row)
{
  int rc= 1;
  MYSQL *mysql= stmt->mysql;
2598
  /*
2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609
    This function won't be called if stmt->field_count is zero
    or execution wasn't done: this is ensured by mysql_stmt_execute.
  */
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
    return 1;
  }
  if (mysql->status != MYSQL_STATUS_GET_RESULT)
  {
    set_stmt_error(stmt, stmt->unbuffered_fetch_cancelled ?
2610
                   CR_FETCH_CANCELED : CR_COMMANDS_OUT_OF_SYNC,
2611 2612 2613 2614 2615 2616 2617
                   unknown_sqlstate);
    goto error;
  }
  if ((*mysql->methods->unbuffered_fetch)(mysql, (char**) row))
  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
2618 2619 2620 2621 2622 2623 2624
    /*
      If there was an error, there are no more pending rows:
      reset statement status to not hang up in following
      mysql_stmt_close (it will try to flush result set before
      closing the statement).
    */
    mysql->status= MYSQL_STATUS_READY;
2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639
    goto error;
  }
  if (!*row)
  {
    mysql->status= MYSQL_STATUS_READY;
    rc= MYSQL_NO_DATA;
    goto error;
  }
  return 0;
error:
  if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
    mysql->unbuffered_fetch_owner= 0;
  return rc;
}

2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672

/*
  Fetch statement row using server side cursor.

  SYNOPSIS
    stmt_read_row_from_cursor()

  RETURN VALUE
    0            success
    1            error
  MYSQL_NO_DATA  end of data
*/

static int
stmt_read_row_from_cursor(MYSQL_STMT *stmt, unsigned char **row)
{
  if (stmt->data_cursor)
    return stmt_read_row_buffered(stmt, row);
  if (stmt->server_status & SERVER_STATUS_LAST_ROW_SENT)
    stmt->server_status &= ~SERVER_STATUS_LAST_ROW_SENT;
  else
  {
    MYSQL *mysql= stmt->mysql;
    NET *net= &mysql->net;
    MYSQL_DATA *result= &stmt->result;
    char buff[4 /* statement id */ +
              4 /* number of rows to fetch */];

    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
    /* Send row request to the server */
    int4store(buff, stmt->stmt_id);
2673
    int4store(buff + 4, stmt->prefetch_rows); /* number of rows to fetch */
2674
    if ((*mysql->methods->advanced_command)(mysql, COM_STMT_FETCH,
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                                            buff, sizeof(buff), NullS, 0,
                                            1, NULL))
2677 2678 2679 2680
    {
      set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
      return 1;
    }
2681
    if ((*mysql->methods->read_rows_from_cursor)(stmt))
2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692
      return 1;
    stmt->server_status= mysql->server_status;

    stmt->data_cursor= result->data;
    return stmt_read_row_buffered(stmt, row);
  }
  *row= 0;
  return MYSQL_NO_DATA;
}


2693 2694 2695 2696 2697 2698 2699 2700
/*
  Default read row function to not SIGSEGV in client in
  case of wrong sequence of API calls.
*/

static int
stmt_read_row_no_data(MYSQL_STMT *stmt  __attribute__((unused)),
                      unsigned char **row  __attribute__((unused)))
2701 2702 2703 2704 2705 2706 2707
{
  return MYSQL_NO_DATA;
}

static int
stmt_read_row_no_result_set(MYSQL_STMT *stmt  __attribute__((unused)),
                      unsigned char **row  __attribute__((unused)))
2708
{
2709 2710
  set_stmt_error(stmt, CR_NO_RESULT_SET, unknown_sqlstate);
  return 1;
2711 2712
}

2713 2714 2715 2716 2717 2718 2719 2720

/*
  Get/set statement attributes

  SYNOPSIS
    mysql_stmt_attr_get()
    mysql_stmt_attr_set()

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2721
    attr_type  statement attribute
2722 2723 2724 2725 2726 2727
    value      casted to const void * pointer to value.

  RETURN VALUE
    0 success
   !0 wrong attribute type
*/
2728

2729 2730 2731 2732 2733 2734 2735 2736
my_bool STDCALL mysql_stmt_attr_set(MYSQL_STMT *stmt,
                                    enum enum_stmt_attr_type attr_type,
                                    const void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
    stmt->update_max_length= value ? *(const my_bool*) value : 0;
    break;
2737
  case STMT_ATTR_CURSOR_TYPE:
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  {
    ulong cursor_type;
    cursor_type= value ? *(ulong*) value : 0UL;
    if (cursor_type > (ulong) CURSOR_TYPE_READ_ONLY)
      goto err_not_implemented;
    stmt->flags= cursor_type;
    break;
  }
  case STMT_ATTR_PREFETCH_ROWS:
  {
    ulong prefetch_rows= value ? *(ulong*) value : DEFAULT_PREFETCH_ROWS;
    if (value == 0)
      return TRUE;
    stmt->prefetch_rows= prefetch_rows;
2752
    break;
2753
  }
2754
  default:
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    goto err_not_implemented;
2756 2757
  }
  return FALSE;
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err_not_implemented:
  set_stmt_error(stmt, CR_NOT_IMPLEMENTED, unknown_sqlstate);
  return TRUE;
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}


2764
my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
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                                    enum enum_stmt_attr_type attr_type,
                                    void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
2770
    *(unsigned long *) value= stmt->update_max_length;
2771
    break;
2772
  case STMT_ATTR_CURSOR_TYPE:
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    *(ulong*) value= stmt->flags;
2774
      break;
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  case STMT_ATTR_PREFETCH_ROWS:
    *(ulong*) value= stmt->prefetch_rows;
    break;
2778
  default:
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    return TRUE;
  }
  return FALSE;
}


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/*
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  Send placeholders data to server (if there are placeholders)
  and execute prepared statement.

  SYNOPSIS
    mysql_stmt_execute()
    stmt  statement handle. The handle must be created
          with mysql_stmt_init() and prepared with
          mysql_stmt_prepare(). If there are placeholders
          in the statement they must be bound to local
          variables with mysql_stmt_bind_param().

  DESCRIPTION
    This function will automatically flush pending result
    set (if there is one), send parameters data to the server
    and read result of statement execution.
    If previous result set was cached with mysql_stmt_store_result()
    it will also be freed in the beginning of this call.
    The server can return 3 types of responses to this command:
    - error, can be retrieved with mysql_stmt_error()
    - ok, no result set pending. In this case we just update
      stmt->insert_id and stmt->affected_rows.
    - the query returns a result set: there could be 0 .. N
    rows in it. In this case the server can also send updated
    result set metadata.

    Next steps you may want to make:
    - find out if there is result set with mysql_stmt_field_count().
    If there is one:
    - optionally, cache entire result set on client to unblock
    connection with mysql_stmt_store_result()
    - bind client variables to result set columns and start read rows
    with mysql_stmt_fetch().
    - reset statement with mysql_stmt_reset() or close it with
    mysql_stmt_close()
    Otherwise:
    - find out last insert id and number of affected rows with
    mysql_stmt_insert_id(), mysql_stmt_affected_rows()

  RETURN
    0   success
    1   error, message can be retrieved with mysql_stmt_error().
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*/

2829
int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt)
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{
2831
  MYSQL *mysql= stmt->mysql;
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  DBUG_ENTER("mysql_stmt_execute");
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  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }

2840
  if (reset_stmt_handle(stmt, RESET_STORE_RESULT))
2841
    DBUG_RETURN(1);
2842 2843
  /*
    No need to check for stmt->state: if the statement wasn't
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2844
    prepared we'll get 'unknown statement handler' error from server.
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  */
  if (mysql->methods->stmt_execute(stmt))
    DBUG_RETURN(1);
2848
  if (mysql->field_count)
2849
  {
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    /* Server has sent result set metadata */
    if (stmt->field_count == 0)
    {
      /*
        This is 'SHOW'/'EXPLAIN'-like query. Current implementation of
        prepared statements can't send result set metadata for these queries
        on prepare stage. Read it now.
      */
      alloc_stmt_fields(stmt);
    }
    else
    {
      /*
        Update result set metadata if it for some reason changed between
        prepare and execute, i.e.:
        - in case of 'SELECT ?' we don't know column type unless data was
          supplied to mysql_stmt_execute, so updated column type is sent
          now.
        - if data dictionary changed between prepare and execute, for
          example a table used in the query was altered.
        Note, that now (4.1.3) we always send metadata in reply to
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        COM_STMT_EXECUTE (even if it is not necessary), so either this or
2872
        previous branch always works.
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        TODO: send metadata only when it's really necessary and add a warning
        'Metadata changed' when it's sent twice.
      */
      update_stmt_fields(stmt);
    }
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  }
  stmt->state= MYSQL_STMT_EXECUTE_DONE;
  if (stmt->field_count)
  {
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    if (stmt->server_status & SERVER_STATUS_CURSOR_EXISTS)
    {
      mysql->status= MYSQL_STATUS_READY;
      stmt->read_row_func= stmt_read_row_from_cursor;
    }
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    else if (stmt->flags & CURSOR_TYPE_READ_ONLY)
    {
      /*
        This is a single-row result set, a result set with no rows, EXPLAIN,
        SHOW VARIABLES, or some other command which either a) bypasses the
        cursors framework in the server and writes rows directly to the
        network or b) is more efficient if all (few) result set rows are
        precached on client and server's resources are freed.
      */
      DBUG_RETURN(mysql_stmt_store_result(stmt));
    }
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    else
    {
      stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
      stmt->unbuffered_fetch_cancelled= FALSE;
      stmt->read_row_func= stmt_read_row_unbuffered;
    }
2904
  }
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  DBUG_RETURN(0);
}

2908

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/*
  Return total parameters count in the statement
*/

2913
ulong STDCALL mysql_stmt_param_count(MYSQL_STMT * stmt)
2914
{
2915
  DBUG_ENTER("mysql_stmt_param_count");
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  DBUG_RETURN(stmt->param_count);
}

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/*
  Return total affected rows from the last statement
*/

my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
2925
  return stmt->affected_rows;
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}
2927

2928

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/*
  Returns the number of result columns for the most recent query
  run on this statement.
*/

unsigned int STDCALL mysql_stmt_field_count(MYSQL_STMT *stmt)
{
  return stmt->field_count;
}

2939
/*
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  Return last inserted id for auto_increment columns.

  SYNOPSIS
    mysql_stmt_insert_id()
    stmt    statement handle

  DESCRIPTION
    Current implementation of this call has a caveat: stmt->insert_id is
    unconditionally updated from mysql->insert_id in the end of each
    mysql_stmt_execute(). This works OK if mysql->insert_id contains new
    value (sent in reply to mysql_stmt_execute()), otherwise stmt->insert_id
    value gets undefined, as it's updated from some arbitrary value saved in
    connection structure during some other call.
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*/

my_ulonglong STDCALL mysql_stmt_insert_id(MYSQL_STMT *stmt)
{
  return stmt->insert_id;
}

2960

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static my_bool int_is_null_true= 1;		/* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;

2964

2965
/*
2966
  Set up input data buffers for a statement.
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  SYNOPSIS
    mysql_stmt_bind_param()
    stmt    statement handle
            The statement must be prepared with mysql_stmt_prepare().
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    my_bind Array of mysql_stmt_param_count() bind parameters.
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            This function doesn't check that size of this argument
            is >= mysql_stmt_field_count(): it's user's responsibility.

  DESCRIPTION
    Use this call after mysql_stmt_prepare() to bind user variables to
    placeholders.
    Each element of bind array stands for a placeholder. Placeholders
    are counted from 0.  For example statement
    'INSERT INTO t (a, b) VALUES (?, ?)'
    contains two placeholders, and for such statement you should supply
    bind array of two elements (MYSQL_BIND bind[2]).

    By properly initializing bind array you can bind virtually any
    C language type to statement's placeholders:
    First, it's strongly recommended to always zero-initialize entire
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    bind structure before setting its members. This will both shorten
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    your application code and make it robust to future extensions of
    MYSQL_BIND structure.
2991
    Then you need to assign typecode of your application buffer to
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    MYSQL_BIND::buffer_type. The following typecodes with their
    correspondence to C language types are supported:
    MYSQL_TYPE_TINY       for 8-bit integer variables. Normally it's
                          'signed char' and 'unsigned char';
    MYSQL_TYPE_SHORT      for 16-bit signed and unsigned variables. This
                          is usually 'short' and 'unsigned short';
    MYSQL_TYPE_LONG       for 32-bit signed and unsigned variables. It
                          corresponds to 'int' and 'unsigned int' on
                          vast majority of platforms. On IA-32 and some
                          other 32-bit systems you can also use 'long'
                          here;
    MYSQL_TYPE_LONGLONG   64-bit signed or unsigned integer.  Stands for
                          '[unsigned] long long' on most platforms;
    MYSQL_TYPE_FLOAT      32-bit floating point type, 'float' on most
                          systems;
    MYSQL_TYPE_DOUBLE     64-bit floating point type, 'double' on most
                          systems;
    MYSQL_TYPE_TIME       broken-down time stored in MYSQL_TIME
                          structure
    MYSQL_TYPE_DATE       date stored in MYSQL_TIME structure
    MYSQL_TYPE_DATETIME   datetime stored in MYSQL_TIME structure See
                          more on how to use these types for sending
                          dates and times below;
    MYSQL_TYPE_STRING     character string, assumed to be in
                          character-set-client. If character set of
                          client is not equal to character set of
                          column, value for this placeholder will be
                          converted to destination character set before
                          insert.
    MYSQL_TYPE_BLOB       sequence of bytes. This sequence is assumed to
                          be in binary character set (which is the same
                          as no particular character set), and is never
                          converted to any other character set. See also
                          notes about supplying string/blob length
                          below.
    MYSQL_TYPE_NULL       special typecode for binding nulls.
    These C/C++ types are not supported yet by the API: long double,
    bool.

    As you can see from the list above, it's responsibility of
    application programmer to ensure that chosen typecode properly
    corresponds to host language type. For example on all platforms
    where we build MySQL packages (as of MySQL 4.1.4) int is a 32-bit
    type. So for int you can always assume that proper typecode is
    MYSQL_TYPE_LONG (however queer it sounds, the name is legacy of the
    old MySQL API). In contrary sizeof(long) can be 4 or 8 8-bit bytes,
    depending on platform.

    TODO: provide client typedefs for each integer and floating point
    typecode, i. e. int8, uint8, float32, etc.

    Once typecode was set, it's necessary to assign MYSQL_BIND::buffer
    to point to the buffer of given type. Finally, additional actions
    may be taken for some types or use cases:

3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106
    Binding integer types.
      For integer types you might also need to set MYSQL_BIND::is_unsigned
      member. Set it to TRUE when binding unsigned char, unsigned short,
      unsigned int, unsigned long, unsigned long long.

    Binding floating point types.
      For floating point types you just need to set
      MYSQL_BIND::buffer_type and MYSQL_BIND::buffer. The rest of the
      members should be zero-initialized.

    Binding NULLs.
      You might have a column always NULL, never NULL, or sometimes
      NULL.  For an always NULL column set MYSQL_BIND::buffer_type to
      MYSQL_TYPE_NULL.  The rest of the members just need to be
      zero-initialized.  For never NULL columns set
      MYSQL_BIND::is_null to 0, or this has already been done if you
      zero-initialized the entire structure.  If you set
      MYSQL_TYPE::is_null to point to an application buffer of type
      'my_bool', then this buffer will be checked on each execution:
      this way you can set the buffer to TRUE, or any non-0 value for
      NULLs, and to FALSE or 0 for not NULL data.

    Binding text strings and sequences of bytes.
      For strings, in addition to MYSQL_BIND::buffer_type and
      MYSQL_BIND::buffer you need to set MYSQL_BIND::length or
      MYSQL_BIND::buffer_length.  If 'length' is set, 'buffer_length'
      is ignored. 'buffer_length' member should be used when size of
      string doesn't change between executions. If you want to vary
      buffer length for each value, set 'length' to point to an
      application buffer of type 'unsigned long' and set this long to
      length of the string before each mysql_stmt_execute().

    Binding dates and times.
      For binding dates and times prepared statements API provides
      clients with MYSQL_TIME structure. A pointer to instance of this
      structure should be assigned to MYSQL_BIND::buffer whenever
      MYSQL_TYPE_TIME, MYSQL_TYPE_DATE, MYSQL_TYPE_DATETIME typecodes
      are used.  When typecode is MYSQL_TYPE_TIME, only members
      'hour', 'minute', 'second' and 'neg' (is time offset negative)
      are used. These members only will be sent to the server.
      MYSQL_TYPE_DATE implies use of 'year', 'month', 'day', 'neg'.
      MYSQL_TYPE_DATETIME utilizes both parts of MYSQL_TIME structure.
      You don't have to set MYSQL_TIME::time_type member: it's not
      used when sending data to the server, typecode information is
      enough.  'second_part' member can hold microsecond precision of
      time value, but now it's only supported on protocol level: you
      can't store microsecond in a column, or use in temporal
      calculations. However, if you send a time value with microsecond
      part for 'SELECT ?', statement, you'll get it back unchanged
      from the server.

    Data conversion.
      If conversion from host language type to data representation,
      corresponding to SQL type, is required it's done on the server.
      Data truncation is possible when conversion is lossy. For
      example, if you supply MYSQL_TYPE_DATETIME value out of valid
      SQL type TIMESTAMP range, the same conversion will be applied as
      if this value would have been sent as string in the old
      protocol.  TODO: document how the server will behave in case of
      truncation/data loss.
3107 3108 3109 3110 3111

    After variables were bound, you can repeatedly set/change their
    values and mysql_stmt_execute() the statement.

    See also: mysql_stmt_send_long_data() for sending long text/blob
3112
    data in pieces, examples in tests/mysql_client_test.c.
3113 3114 3115 3116 3117 3118 3119 3120 3121 3122
    Next steps you might want to make:
    - execute statement with mysql_stmt_execute(),
    - reset statement using mysql_stmt_reset() or reprepare it with
      another query using mysql_stmt_prepare()
    - close statement with mysql_stmt_close().

  IMPLEMENTATION
    The function copies given bind array to internal storage of the
    statement, and sets up typecode-specific handlers to perform
    serialization of bound data. This means that although you don't need
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    to call this routine after each assignment to bind buffers, you
    need to call it each time you change parameter typecodes, or other
3125 3126 3127
    members of MYSQL_BIND array.
    This is a pure local call. Data types of client buffers are sent
    along with buffers' data at first execution of the statement.
3128 3129 3130 3131

  RETURN
    0  success
    1  error, can be retrieved with mysql_stmt_error.
3132 3133
*/

3134
my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT *stmt, MYSQL_BIND *my_bind)
3135
{
3136 3137
  uint count=0;
  MYSQL_BIND *param, *end;
3138
  DBUG_ENTER("mysql_stmt_bind_param");
3139

3140 3141 3142 3143 3144 3145 3146 3147 3148 3149
  if (!stmt->param_count)
  {
    if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
    {
      set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
      DBUG_RETURN(1);
    }
    DBUG_RETURN(0);
  }

3150
  /* Allocated on prepare */
3151
  memcpy((char*) stmt->params, (char*) my_bind,
3152 3153 3154 3155 3156
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
3157
  {
3158
    param->param_number= count++;
3159 3160
    param->long_data_used= 0;

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    /* If param->is_null is not set, then the value can never be NULL */
    if (!param->is_null)
      param->is_null= &int_is_null_false;

3165 3166
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
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    case MYSQL_TYPE_NULL:
3168
      param->is_null= &int_is_null_true;
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3169
      break;
3170
    case MYSQL_TYPE_TINY:
3171
      /* Force param->length as this is fixed for this type */
3172 3173
      param->length= &param->buffer_length;
      param->buffer_length= 1;
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      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
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      param->length= &param->buffer_length;
      param->buffer_length= 2;
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      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
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      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
3187 3188
      param->length= &param->buffer_length;
      param->buffer_length= 8;
3189 3190 3191
      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
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      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
3197 3198
      param->length= &param->buffer_length;
      param->buffer_length= 8;
3199 3200
      param->store_param_func= store_param_double;
      break;
3201 3202
    case MYSQL_TYPE_TIME:
      param->store_param_func= store_param_time;
3203
      param->buffer_length= MAX_TIME_REP_LENGTH;
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      break;
    case MYSQL_TYPE_DATE:
      param->store_param_func= store_param_date;
3207
      param->buffer_length= MAX_DATE_REP_LENGTH;
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      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->store_param_func= store_param_datetime;
3212
      param->buffer_length= MAX_DATETIME_REP_LENGTH;
3213
      break;
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    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
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3217
    case MYSQL_TYPE_BLOB:
3218
    case MYSQL_TYPE_VARCHAR:
3219 3220
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
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    case MYSQL_TYPE_DECIMAL:
    case MYSQL_TYPE_NEWDECIMAL:
3223
      param->store_param_func= store_param_str;
3224
      /*
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        For variable length types user must set either length or
        buffer_length.
3227
      */
3228 3229
      break;
    default:
3230
      strmov(stmt->sqlstate, unknown_sqlstate);
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      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
3233
	      param->buffer_type, count);
3234
      DBUG_RETURN(1);
3235
    }
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    /*
      If param->length is not given, change it to point to buffer_length.
      This way we can always use *param->length to get the length of data
    */
    if (!param->length)
      param->length= &param->buffer_length;
3242
  }
3243
  /* We have to send/resend type information to MySQL */
3244 3245
  stmt->send_types_to_server= TRUE;
  stmt->bind_param_done= TRUE;
3246 3247 3248
  DBUG_RETURN(0);
}

3249

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/********************************************************************
 Long data implementation
*********************************************************************/

/*
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  Send long data in pieces to the server

  SYNOPSIS
3258
    mysql_stmt_send_long_data()
3259 3260 3261 3262
    stmt			Statement handler
    param_number		Parameter number (0 - N-1)
    data			Data to send to server
    length			Length of data to send (may be 0)
3263

3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287
  DESCRIPTION
    This call can be used repeatedly to send long data in pieces
    for any string/binary placeholder. Data supplied for
    a placeholder is saved at server side till execute, and then
    used instead of value from MYSQL_BIND object. More precisely,
    if long data for a parameter was supplied, MYSQL_BIND object
    corresponding to this parameter is not sent to server. In the
    end of execution long data states of placeholders are reset,
    so next time values of such placeholders will be taken again
    from MYSQL_BIND array.
    The server does not reply to this call: if there was an error
    in data handling (which now only can happen if server run out
    of memory) it would be returned in reply to
    mysql_stmt_execute().
    You should choose type of long data carefully if you care
    about character set conversions performed by server when the
    statement is executed.  No conversion is performed at all for
    MYSQL_TYPE_BLOB and other binary typecodes. For
    MYSQL_TYPE_STRING and the rest of text placeholders data is
    converted from client character set to character set of
    connection. If these character sets are different, this
    conversion may require additional memory at server, equal to
    total size of supplied pieces.

3288
  RETURN VALUES
3289 3290
    0	ok
    1	error
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*/

3293
my_bool STDCALL
3294
mysql_stmt_send_long_data(MYSQL_STMT *stmt, uint param_number,
3295
		     const char *data, ulong length)
3296 3297
{
  MYSQL_BIND *param;
3298
  DBUG_ENTER("mysql_stmt_send_long_data");
3299
  DBUG_ASSERT(stmt != 0);
3300 3301
  DBUG_PRINT("enter",("param no: %d  data: 0x%lx, length : %ld",
		      param_number, (long) data, length));
3302

3303 3304 3305 3306 3307 3308 3309 3310 3311
  /*
    We only need to check for stmt->param_count, if it's not null
    prepare was done.
  */
  if (param_number >= stmt->param_count)
  {
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
    DBUG_RETURN(1);
  }
3312

3313
  param= stmt->params+param_number;
3314
  if (!IS_LONGDATA(param->buffer_type))
3315
  {
3316
    /* Long data handling should be used only for string/binary types */
3317
    strmov(stmt->sqlstate, unknown_sqlstate);
3318 3319 3320 3321
    sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	    param->param_number);
    DBUG_RETURN(1);
  }
3322

3323
  /*
3324 3325 3326
    Send long data packet if there is data or we're sending long data
    for the first time.
  */
3327
  if (length || param->long_data_used == 0)
3328
  {
3329
    MYSQL *mysql= stmt->mysql;
3330
    /* Packet header: stmt id (4 bytes), param no (2 bytes) */
3331 3332
    char buff[MYSQL_LONG_DATA_HEADER];

3333 3334
    int4store(buff, stmt->stmt_id);
    int2store(buff + 4, param_number);
3335 3336
    param->long_data_used= 1;

3337 3338 3339 3340
    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
3341 3342
    if ((*mysql->methods->advanced_command)(mysql, COM_STMT_SEND_LONG_DATA,
                                            buff, sizeof(buff), data,
3343
                                            length, 1, NULL))
3344
    {
3345 3346
      set_stmt_errmsg(stmt, mysql->net.last_error,
		      mysql->net.last_errno, mysql->net.sqlstate);
3347 3348 3349 3350 3351 3352
      DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}

3353

3354
/********************************************************************
3355
 Fetch and conversion of result set rows (binary protocol).
3356 3357
*********************************************************************/

3358 3359 3360 3361 3362 3363 3364 3365
/*
  Read date, (time, datetime) value from network buffer and store it
  in MYSQL_TIME structure.

  SYNOPSIS
    read_binary_{date,time,datetime}()
    tm    MYSQL_TIME structure to fill
    pos   pointer to current position in network buffer.
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3366 3367
          These functions increase pos to point to the beginning of the
          next column.
3368 3369 3370 3371 3372 3373

  Auxiliary functions to read time (date, datetime) values from network
  buffer and store in MYSQL_TIME structure. Jointly used by conversion
  and no-conversion fetching.
*/

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konstantin@mysql.com committed
3374
static void read_binary_time(MYSQL_TIME *tm, uchar **pos)
3375
{
3376
  /* net_field_length will set pos to the first byte of data */
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3377 3378 3379
  uint length= net_field_length(pos);

  if (length)
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3380 3381 3382
  {
    uchar *to= *pos;
    tm->neg= (bool) to[0];
3383

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3384 3385 3386 3387 3388 3389
    tm->day=    (ulong) sint4korr(to+1);
    tm->hour=   (uint) to[5];
    tm->minute= (uint) to[6];
    tm->second= (uint) to[7];
    tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
    tm->year= tm->month= 0;
3390 3391 3392 3393 3394 3395
    if (tm->day)
    {
      /* Convert days to hours at once */
      tm->hour+= tm->day*24;
      tm->day= 0;
    }
3396 3397
    tm->time_type= MYSQL_TIMESTAMP_TIME;

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3398
    *pos+= length;
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3399
  }
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3400
  else
3401
    set_zero_time(tm, MYSQL_TIMESTAMP_TIME);
3402 3403
}

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3404
static void read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
3405
{
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3406
  uint length= net_field_length(pos);
3407

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3408
  if (length)
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konstantin@mysql.com committed
3409 3410
  {
    uchar *to= *pos;
3411

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3412 3413 3414 3415
    tm->neg=    0;
    tm->year=   (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day=    (uint) to[3];
3416

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3417 3418 3419 3420 3421 3422 3423 3424 3425
    if (length > 4)
    {
      tm->hour=   (uint) to[4];
      tm->minute= (uint) to[5];
      tm->second= (uint) to[6];
    }
    else
      tm->hour= tm->minute= tm->second= 0;
    tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
3426
    tm->time_type= MYSQL_TIMESTAMP_DATETIME;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3427 3428

    *pos+= length;
3429
  }
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konstantin@mysql.com committed
3430
  else
3431
    set_zero_time(tm, MYSQL_TIMESTAMP_DATETIME);
3432 3433
}

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konstantin@mysql.com committed
3434
static void read_binary_date(MYSQL_TIME *tm, uchar **pos)
3435
{
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konstantin@mysql.com committed
3436
  uint length= net_field_length(pos);
3437

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konstantin@mysql.com committed
3438
  if (length)
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konstantin@mysql.com committed
3439 3440 3441 3442 3443
  {
    uchar *to= *pos;
    tm->year =  (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day= (uint) to[3];
3444

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3445 3446 3447
    tm->hour= tm->minute= tm->second= 0;
    tm->second_part= 0;
    tm->neg= 0;
3448
    tm->time_type= MYSQL_TIMESTAMP_DATE;
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konstantin@mysql.com committed
3449 3450

    *pos+= length;
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konstantin@mysql.com committed
3451
  }
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konstantin@mysql.com committed
3452
  else
3453
    set_zero_time(tm, MYSQL_TIMESTAMP_DATE);
3454 3455
}

3456

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3457 3458 3459 3460 3461 3462 3463 3464 3465
/*
  Convert string to supplied buffer of any type.

  SYNOPSIS
    fetch_string_with_conversion()
    param   output buffer descriptor
    value   column data
    length  data length
*/
3466

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3467 3468
static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
                                         uint length)
3469
{
3470
  char *buffer= (char *)param->buffer;
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konstantin@mysql.com committed
3471
  int err= 0;
3472
  char *endptr= value + length;
3473

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3474 3475 3476 3477
  /*
    This function should support all target buffer types: the rest
    of conversion functions can delegate conversion to it.
  */
3478
  switch (param->buffer_type) {
3479 3480
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3481
  case MYSQL_TYPE_TINY:
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konstantin@mysql.com committed
3482
  {
3483
    longlong data= my_strtoll10(value, &endptr, &err);
3484
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3485
                                 INT_MIN8, INT_MAX8, UINT_MAX8) || err > 0);
3486
    *buffer= (uchar) data;
3487
    break;
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konstantin@mysql.com committed
3488
  }
3489
  case MYSQL_TYPE_SHORT:
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konstantin@mysql.com committed
3490
  {
3491
    longlong data= my_strtoll10(value, &endptr, &err);
3492
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3493
                                 INT_MIN16, INT_MAX16, UINT_MAX16) || err > 0);
3494
    shortstore(buffer, (short) data);
3495
    break;
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konstantin@mysql.com committed
3496
  }
3497
  case MYSQL_TYPE_LONG:
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konstantin@mysql.com committed
3498
  {
3499
    longlong data= my_strtoll10(value, &endptr, &err);
3500
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3501
                                 INT_MIN32, INT_MAX32, UINT_MAX32) || err > 0);
3502
    longstore(buffer, (int32) data);
3503
    break;
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konstantin@mysql.com committed
3504
  }
3505
  case MYSQL_TYPE_LONGLONG:
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konstantin@mysql.com committed
3506
  {
3507 3508 3509
    longlong data= my_strtoll10(value, &endptr, &err);
    *param->error= param->is_unsigned ? err != 0 :
                                       (err > 0 || (err == 0 && data < 0));
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konstantin@mysql.com committed
3510
    longlongstore(buffer, data);
3511
    break;
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konstantin@mysql.com committed
3512
  }
3513
  case MYSQL_TYPE_FLOAT:
3514
  {
3515 3516 3517 3518
    double data= my_strntod(&my_charset_latin1, value, length, &endptr, &err);
    float fdata= (float) data;
    *param->error= (fdata != data) | test(err);
    floatstore(buffer, fdata);
3519 3520
    break;
  }
3521
  case MYSQL_TYPE_DOUBLE:
3522
  {
3523 3524
    double data= my_strntod(&my_charset_latin1, value, length, &endptr, &err);
    *param->error= test(err);
3525
    doublestore(buffer, data);
3526 3527
    break;
  }
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konstantin@mysql.com committed
3528 3529 3530 3531
  case MYSQL_TYPE_TIME:
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
    str_to_time(value, length, tm, &err);
3532
    *param->error= test(err);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3533 3534 3535 3536
    break;
  }
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_DATETIME:
3537
  case MYSQL_TYPE_TIMESTAMP:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3538 3539
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
3540
    (void) str_to_datetime(value, length, tm, TIME_FUZZY_DATE, &err);
3541 3542
    *param->error= test(err) && (param->buffer_type == MYSQL_TYPE_DATE &&
                                 tm->time_type != MYSQL_TIMESTAMP_DATE);
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3543 3544 3545 3546 3547 3548
    break;
  }
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
3549 3550
  case MYSQL_TYPE_DECIMAL:
  case MYSQL_TYPE_NEWDECIMAL:
3551
  default:
3552
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566
    /*
      Copy column data to the buffer taking into account offset,
      data length and buffer length.
    */
    char *start= value + param->offset;
    char *end= value + length;
    ulong copy_length;
    if (start < end)
    {
      copy_length= end - start;
      /* We've got some data beyond offset: copy up to buffer_length bytes */
      if (param->buffer_length)
        memcpy(buffer, start, min(copy_length, param->buffer_length));
    }
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monty@mashka.mysql.fi committed
3567
    else
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konstantin@mysql.com committed
3568 3569 3570
      copy_length= 0;
    if (copy_length < param->buffer_length)
      buffer[copy_length]= '\0';
3571
    *param->error= copy_length > param->buffer_length;
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konstantin@mysql.com committed
3572 3573 3574 3575
    /*
      param->length will always contain length of entire column;
      number of copied bytes may be way different:
    */
3576
    *param->length= length;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3577
    break;
3578
  }
3579
  }
3580 3581
}

3582

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3583 3584
/*
  Convert integer value to client buffer of any type.
3585

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3586 3587 3588 3589 3590 3591
  SYNOPSIS
    fetch_long_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
*/
3592

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konstantin@mysql.com committed
3593
static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
3594
                                       longlong value, my_bool is_unsigned)
3595
{
3596
  char *buffer= (char *)param->buffer;
3597

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konstantin@mysql.com committed
3598
  switch (param->buffer_type) {
3599 3600
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3601
  case MYSQL_TYPE_TINY:
3602
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3603
                                INT_MIN8, INT_MAX8, UINT_MAX8);
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konstantin@mysql.com committed
3604
    *(uchar *)param->buffer= (uchar) value;
3605 3606
    break;
  case MYSQL_TYPE_SHORT:
3607
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3608
                                INT_MIN16, INT_MAX16, UINT_MAX16);
3609
    shortstore(buffer, (short) value);
3610 3611
    break;
  case MYSQL_TYPE_LONG:
3612
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3613
                                INT_MIN32, INT_MAX32, UINT_MAX32);
3614
    longstore(buffer, (int32) value);
3615 3616
    break;
  case MYSQL_TYPE_LONGLONG:
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konstantin@mysql.com committed
3617
    longlongstore(buffer, value);
3618
    *param->error= param->is_unsigned != is_unsigned && value < 0;
3619 3620
    break;
  case MYSQL_TYPE_FLOAT:
3621
  {
3622
    /*
3623
      We need to mark the local variable volatile to
3624 3625 3626
      workaround Intel FPU executive precision feature.
      (See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
    */
3627
    volatile float data;
3628
    if (is_unsigned)
3629
    {
3630
      data= (float) ulonglong2double(value);
3631 3632
      *param->error= ((ulonglong) value) != ((ulonglong) data);
    }
3633
    else
3634 3635 3636 3637
    {
      data= (float)value;
      *param->error= value != ((longlong) data);
    }
3638
    floatstore(buffer, data);
3639 3640
    break;
  }
3641
  case MYSQL_TYPE_DOUBLE:
3642
  {
3643
    volatile double data;
3644
    if (is_unsigned)
3645
    {
3646
      data= ulonglong2double(value);
3647 3648
      *param->error= ((ulonglong) value) != ((ulonglong) data);
    }
3649
    else
3650
    {
3651
      data= (double)value;
3652 3653
      *param->error= value != ((longlong) data);
    }
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konstantin@mysql.com committed
3654
    doublestore(buffer, data);
3655 3656
    break;
  }
3657 3658 3659 3660 3661 3662
  case MYSQL_TYPE_TIME:
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_TIMESTAMP:
  case MYSQL_TYPE_DATETIME:
  {
    int error;
3663 3664
    value= number_to_datetime(value, (MYSQL_TIME *) buffer, TIME_FUZZY_DATE,
                              &error);
3665 3666 3667
    *param->error= test(error);
    break;
  }
3668
  default:
3669
  {
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konstantin@mysql.com committed
3670
    char buff[22];                              /* Enough for longlong */
3671
    char *end= longlong10_to_str(value, buff, is_unsigned ? 10: -10);
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konstantin@mysql.com committed
3672
    /* Resort to string conversion which supports all typecodes */
3673 3674 3675 3676 3677 3678 3679 3680 3681 3682
    uint length= (uint) (end-buff);

    if (field->flags & ZEROFILL_FLAG && length < field->length &&
        field->length < 21)
    {
      bmove_upp((char*) buff+field->length,buff+length, length);
      bfill((char*) buff, field->length - length,'0');
      length= field->length;
    }
    fetch_string_with_conversion(param, buff, length);
kent@mysql.com's avatar
kent@mysql.com committed
3683
    break;
3684
  }
3685
  }
3686 3687
}

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3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698
/*
  Convert double/float column to supplied buffer of any type.

  SYNOPSIS
    fetch_float_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
    width   default number of significant digits used when converting
            float/double to string
*/
3699

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3700 3701
static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                        double value, int width)
3702
{
3703
  char *buffer= (char *)param->buffer;
3704
  double val64 = (value < 0 ? -floor(-value) : floor(value));
3705

konstantin@mysql.com's avatar
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3706
  switch (param->buffer_type) {
3707 3708
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3709
  case MYSQL_TYPE_TINY:
3710 3711 3712 3713 3714 3715
    /*
      We need to _store_ data in the buffer before the truncation check to
      workaround Intel FPU executive precision feature.
      (See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
      Sic: AFAIU it does not guarantee to work.
    */
3716
    if (param->is_unsigned)
3717
      *buffer= (uint8) value;
3718
    else
3719
      *buffer= (int8) value;
3720 3721
    *param->error= val64 != (param->is_unsigned ? (double)((uint8) *buffer) :
                                                  (double)((int8) *buffer));
3722 3723
    break;
  case MYSQL_TYPE_SHORT:
3724 3725 3726 3727 3728 3729 3730 3731 3732 3733
    if (param->is_unsigned)
    {
      ushort data= (ushort) value;
      shortstore(buffer, data);
    }
    else
    {
      short data= (short) value;
      shortstore(buffer, data);
    }
3734
    *param->error= val64 != (param->is_unsigned ? (double) (*(ushort*) buffer):
3735
                                                  (double) (*(short*) buffer));
3736 3737
    break;
  case MYSQL_TYPE_LONG:
3738 3739 3740 3741 3742 3743 3744 3745 3746 3747
    if (param->is_unsigned)
    {
      uint32 data= (uint32) value;
      longstore(buffer, data);
    }
    else
    {
      int32 data= (int32) value;
      longstore(buffer, data);
    }
3748
    *param->error= val64 != (param->is_unsigned ? (double) (*(uint32*) buffer):
3749 3750
                                                  (double) (*(int32*) buffer));
      break;
3751
  case MYSQL_TYPE_LONGLONG:
3752 3753 3754 3755 3756 3757 3758 3759 3760 3761
    if (param->is_unsigned)
    {
      ulonglong data= (ulonglong) value;
      longlongstore(buffer, data);
    }
    else
    {
      longlong data= (longlong) value;
      longlongstore(buffer, data);
    }
3762
    *param->error= val64 != (param->is_unsigned ?
3763
                             ulonglong2double(*(ulonglong*) buffer) :
3764
                             (double) (*(longlong*) buffer));
3765 3766 3767
    break;
  case MYSQL_TYPE_FLOAT:
  {
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konstantin@mysql.com committed
3768
    float data= (float) value;
3769
    floatstore(buffer, data);
3770
    *param->error= (*(float*) buffer) != value;
3771 3772 3773 3774
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
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konstantin@mysql.com committed
3775
    doublestore(buffer, value);
3776 3777
    break;
  }
3778
  default:
3779
  {
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konstantin@mysql.com committed
3780 3781 3782 3783 3784
    /*
      Resort to fetch_string_with_conversion: this should handle
      floating point -> string conversion nicely, honor all typecodes
      and param->offset possibly set in mysql_stmt_fetch_column
    */
3785
    char buff[MAX_DOUBLE_STRING_REP_LENGTH];
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konstantin@mysql.com committed
3786 3787 3788
    char *end;
    /* TODO: move this to a header shared between client and server. */
#define NOT_FIXED_DEC  31
3789
    if (field->decimals >= NOT_FIXED_DEC)
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konstantin@mysql.com committed
3790 3791
#undef NOT_FIXED_DEC
    {
3792 3793 3794 3795 3796 3797 3798 3799
      /*
        The 14 below is to ensure that the server and client has the same
        precisions. This will ensure that on the same machine you get the
        same value as a string independent of the protocol you use.
      */
      sprintf(buff, "%-*.*g", (int) min(sizeof(buff)-1,
                                        param->buffer_length),
	      min(14,width), value);
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konstantin@mysql.com committed
3800 3801 3802
      end= strcend(buff, ' ');
      *end= 0;
    }
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monty@mashka.mysql.fi committed
3803
    else
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konstantin@mysql.com committed
3804
    {
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      sprintf(buff, "%.*f", (int) field->decimals, value);
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      end= strend(buff);
    }
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    {
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      size_t length= end - buff;
      if (field->flags & ZEROFILL_FLAG && length < field->length &&
          field->length < MAX_DOUBLE_STRING_REP_LENGTH - 1)
      {
        bmove_upp((char*) buff + field->length, buff + length, length);
        bfill((char*) buff, field->length - length, '0');
        length= field->length;
      }
      fetch_string_with_conversion(param, buff, length);
3819
    }
3820

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    break;
  }
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  }
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}

3826

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/*
  Fetch time/date/datetime to supplied buffer of any type

  SYNOPSIS
    param   output buffer descriptor
    time    column data
*/

static void fetch_datetime_with_conversion(MYSQL_BIND *param,
3836
                                           MYSQL_FIELD *field,
3837
                                           MYSQL_TIME *my_time)
3838 3839
{
  switch (param->buffer_type) {
3840 3841
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3842
  case MYSQL_TYPE_DATE:
3843 3844
    *(MYSQL_TIME *)(param->buffer)= *my_time;
    *param->error= my_time->time_type != MYSQL_TIMESTAMP_DATE;
3845
    break;
3846
  case MYSQL_TYPE_TIME:
3847 3848
    *(MYSQL_TIME *)(param->buffer)= *my_time;
    *param->error= my_time->time_type != MYSQL_TIMESTAMP_TIME;
3849
    break;
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  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
3852
    *(MYSQL_TIME *)(param->buffer)= *my_time;
3853
    /* No error: time and date are compatible with datetime */
3854
    break;
3855
  case MYSQL_TYPE_YEAR:
3856
    shortstore(param->buffer, my_time->year);
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    *param->error= 1;
    break;
  case MYSQL_TYPE_FLOAT:
  case MYSQL_TYPE_DOUBLE:
  {
3862
    ulonglong value= TIME_to_ulonglong(my_time);
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    fetch_float_with_conversion(param, field,
                                ulonglong2double(value), DBL_DIG);
    break;
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  }
  case MYSQL_TYPE_TINY:
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_INT24:
  case MYSQL_TYPE_LONG:
  case MYSQL_TYPE_LONGLONG:
  {
3873
    longlong value= (longlong) TIME_to_ulonglong(my_time);
3874
    fetch_long_with_conversion(param, field, value, TRUE);
3875
    break;
3876
  }
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  default:
  {
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    /*
      Convert time value  to string and delegate the rest to
      fetch_string_with_conversion:
    */
3883
    char buff[MAX_DATE_STRING_REP_LENGTH];
3884
    uint length= my_TIME_to_str(my_time, buff);
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    /* Resort to string conversion */
    fetch_string_with_conversion(param, (char *)buff, length);
    break;
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  }
  }
}
3891

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/*
  Fetch and convert result set column to output buffer.

  SYNOPSIS
    fetch_result_with_conversion()
    param   output buffer descriptor
    field   column metadata
    row     points to a column of result set tuple in binary format

  DESCRIPTION
    This is a fallback implementation of column fetch used
    if column and output buffer types do not match.
    Increases tuple pointer to point at the next column within the
    tuple.
*/
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static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                         uchar **row)
3911
{
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  enum enum_field_types field_type= field->type;
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  uint field_is_unsigned= field->flags & UNSIGNED_FLAG;
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  switch (field_type) {
  case MYSQL_TYPE_TINY:
  {
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    uchar value= **row;
    /* sic: we need to cast to 'signed char' as 'char' may be unsigned */
    longlong data= field_is_unsigned ? (longlong) value :
                                       (longlong) (signed char) value;
3922
    fetch_long_with_conversion(param, field, data, 0);
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    *row+= 1;
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    break;
  }
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
  {
3929
    short value= sint2korr(*row);
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    longlong data= field_is_unsigned ? (longlong) (unsigned short) value :
                                       (longlong) value;
3932
    fetch_long_with_conversion(param, field, data, 0);
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    *row+= 2;
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    break;
  }
3936
  case MYSQL_TYPE_INT24: /* mediumint is sent as 4 bytes int */
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  case MYSQL_TYPE_LONG:
  {
3939 3940
    int32 value= sint4korr(*row);
    longlong data= field_is_unsigned ? (longlong) (uint32) value :
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3941
                                       (longlong) value;
3942
    fetch_long_with_conversion(param, field, data, 0);
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    *row+= 4;
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    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
    longlong value= (longlong)sint8korr(*row);
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    fetch_long_with_conversion(param, field, value,
                               field->flags & UNSIGNED_FLAG);
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    *row+= 8;
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    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
    float value;
    float4get(value,*row);
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3958
    fetch_float_with_conversion(param, field, value, FLT_DIG);
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    *row+= 4;
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    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
    double value;
    float8get(value,*row);
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    fetch_float_with_conversion(param, field, value, DBL_DIG);
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    *row+= 8;
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    break;
  }
  case MYSQL_TYPE_DATE:
  {
3972
    MYSQL_TIME tm;
3973

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    read_binary_date(&tm, row);
3975
    fetch_datetime_with_conversion(param, field, &tm);
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    break;
  }
  case MYSQL_TYPE_TIME:
  {
3980
    MYSQL_TIME tm;
3981

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    read_binary_time(&tm, row);
3983
    fetch_datetime_with_conversion(param, field, &tm);
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    break;
  }
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME tm;
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    read_binary_datetime(&tm, row);
3992
    fetch_datetime_with_conversion(param, field, &tm);
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    break;
  }
3995
  default:
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  {
    ulong length= net_field_length(row);
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    fetch_string_with_conversion(param, (char*) *row, length);
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    *row+= length;
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    break;
  }
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  }
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}

4005

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/*
  Functions to fetch data to application buffers without conversion.

  All functions have the following characteristics:

  SYNOPSIS
    fetch_result_xxx()
    param   MySQL bind param
    pos     Row value

  DESCRIPTION
    These are no-conversion functions, used in binary protocol to store
    rows in application buffers. A function used only if type of binary data
    is compatible with type of application buffer.

  RETURN
    none
*/

4025 4026
static void fetch_result_tinyint(MYSQL_BIND *param, MYSQL_FIELD *field,
                                 uchar **row)
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{
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  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  uchar data= **row;
  *(uchar *)param->buffer= data;
4031
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX8;
4032
  (*row)++;
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}

4035 4036
static void fetch_result_short(MYSQL_BIND *param, MYSQL_FIELD *field,
                               uchar **row)
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{
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  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  ushort data= (ushort) sint2korr(*row);
  shortstore(param->buffer, data);
4041
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX16;
4042
  *row+= 2;
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}

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static void fetch_result_int32(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
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{
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  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  uint32 data= (uint32) sint4korr(*row);
  longstore(param->buffer, data);
4052
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX32;
4053
  *row+= 4;
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}

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static void fetch_result_int64(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
4059
{
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  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  ulonglong data= (ulonglong) sint8korr(*row);
4062
  *param->error= param->is_unsigned != field_is_unsigned && data > LONGLONG_MAX;
4063
  longlongstore(param->buffer, data);
4064
  *row+= 8;
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}

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static void fetch_result_float(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
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{
  float value;
  float4get(value,*row);
4073
  floatstore(param->buffer, value);
4074
  *row+= 4;
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}

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static void fetch_result_double(MYSQL_BIND *param,
                                MYSQL_FIELD *field __attribute__((unused)),
                                uchar **row)
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{
  double value;
  float8get(value,*row);
4083
  doublestore(param->buffer, value);
4084
  *row+= 8;
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}

4087 4088 4089
static void fetch_result_time(MYSQL_BIND *param,
                              MYSQL_FIELD *field __attribute__((unused)),
                              uchar **row)
4090 4091
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
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  read_binary_time(tm, row);
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}

4095 4096 4097
static void fetch_result_date(MYSQL_BIND *param,
                              MYSQL_FIELD *field __attribute__((unused)),
                              uchar **row)
4098 4099
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
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  read_binary_date(tm, row);
4101 4102
}

4103 4104 4105
static void fetch_result_datetime(MYSQL_BIND *param,
                                  MYSQL_FIELD *field __attribute__((unused)),
                                  uchar **row)
4106 4107
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
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4108
  read_binary_datetime(tm, row);
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}

4111 4112 4113
static void fetch_result_bin(MYSQL_BIND *param,
                             MYSQL_FIELD *field __attribute__((unused)),
                             uchar **row)
4114
{
4115 4116 4117
  ulong length= net_field_length(row);
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
4118
  *param->length= length;
4119
  *param->error= copy_length < length;
4120 4121
  *row+= length;
}
4122

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static void fetch_result_str(MYSQL_BIND *param,
                             MYSQL_FIELD *field __attribute__((unused)),
                             uchar **row)
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{
  ulong length= net_field_length(row);
4128 4129
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
4130 4131
  /* Add an end null if there is room in the buffer */
  if (copy_length != param->buffer_length)
4132
    ((uchar *)param->buffer)[copy_length]= '\0';
4133
  *param->length= length;			/* return total length */
4134
  *param->error= copy_length < length;
4135
  *row+= length;
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}

4138

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/*
  functions to calculate max lengths for strings during
  mysql_stmt_store_result()
*/

static void skip_result_fixed(MYSQL_BIND *param,
			      MYSQL_FIELD *field __attribute__((unused)),
			      uchar **row)

{
  (*row)+= param->pack_length;
}


static void skip_result_with_length(MYSQL_BIND *param __attribute__((unused)),
				    MYSQL_FIELD *field __attribute__((unused)),
				    uchar **row)

{
  ulong length= net_field_length(row);
  (*row)+= length;
}


static void skip_result_string(MYSQL_BIND *param __attribute__((unused)),
			       MYSQL_FIELD *field,
			       uchar **row)

{
  ulong length= net_field_length(row);
  (*row)+= length;
  if (field->max_length < length)
    field->max_length= length;
}


4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192
/*
  Check that two field types are binary compatible i. e.
  have equal representation in the binary protocol and
  require client-side buffers of the same type.

  SYNOPSIS
    is_binary_compatible()
    type1   parameter type supplied by user
    type2   field type, obtained from result set metadata

  RETURN
    TRUE or FALSE
*/

static my_bool is_binary_compatible(enum enum_field_types type1,
                                    enum enum_field_types type2)
{
  static const enum enum_field_types
4193 4194 4195
    range1[]= { MYSQL_TYPE_SHORT, MYSQL_TYPE_YEAR, MYSQL_TYPE_NULL },
    range2[]= { MYSQL_TYPE_INT24, MYSQL_TYPE_LONG, MYSQL_TYPE_NULL },
    range3[]= { MYSQL_TYPE_DATETIME, MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_NULL },
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    range4[]= { MYSQL_TYPE_ENUM, MYSQL_TYPE_SET, MYSQL_TYPE_TINY_BLOB,
                MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB, MYSQL_TYPE_BLOB,
                MYSQL_TYPE_VAR_STRING, MYSQL_TYPE_STRING, MYSQL_TYPE_GEOMETRY,
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                MYSQL_TYPE_DECIMAL, MYSQL_TYPE_NULL };
  static const enum enum_field_types
4201 4202
   *range_list[]= { range1, range2, range3, range4 },
   **range_list_end= range_list + sizeof(range_list)/sizeof(*range_list);
4203
   const enum enum_field_types **range, *type;
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  if (type1 == type2)
    return TRUE;
  for (range= range_list; range != range_list_end; ++range)
  {
    /* check that both type1 and type2 are in the same range */
    bool type1_found= FALSE, type2_found= FALSE;
4211
    for (type= *range; *type != MYSQL_TYPE_NULL; type++)
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    {
      type1_found|= type1 == *type;
      type2_found|= type2 == *type;
    }
    if (type1_found || type2_found)
      return type1_found && type2_found;
  }
  return FALSE;
}


/*
  Setup a fetch function for one column of a result set.

  SYNOPSIS
    setup_one_fetch_function()
    param    output buffer descriptor
    field    column descriptor

  DESCRIPTION
    When user binds result set buffers or when result set
    metadata is changed, we need to setup fetch (and possibly
    conversion) functions for all columns of the result set.
    In addition to that here we set up skip_result function, used
    to update result set metadata in case when
    STMT_ATTR_UPDATE_MAX_LENGTH attribute is set.
    Notice that while fetch_result is chosen depending on both
    field->type and param->type, skip_result depends on field->type
    only.

  RETURN
    TRUE   fetch function for this typecode was not found (typecode
          is not supported by the client library)
    FALSE  success
*/

static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
{
4250 4251
  DBUG_ENTER("setup_one_fetch_function");

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  /* Setup data copy functions for the different supported types */
  switch (param->buffer_type) {
  case MYSQL_TYPE_NULL: /* for dummy binds */
    /*
      It's not binary compatible with anything the server can return:
      no need to setup fetch_result, as it'll be reset anyway
    */
    *param->length= 0;
    break;
  case MYSQL_TYPE_TINY:
    param->fetch_result= fetch_result_tinyint;
    *param->length= 1;
    break;
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
    param->fetch_result= fetch_result_short;
    *param->length= 2;
    break;
  case MYSQL_TYPE_INT24:
  case MYSQL_TYPE_LONG:
    param->fetch_result= fetch_result_int32;
    *param->length= 4;
    break;
  case MYSQL_TYPE_LONGLONG:
    param->fetch_result= fetch_result_int64;
    *param->length= 8;
    break;
  case MYSQL_TYPE_FLOAT:
    param->fetch_result= fetch_result_float;
    *param->length= 4;
    break;
  case MYSQL_TYPE_DOUBLE:
    param->fetch_result= fetch_result_double;
    *param->length= 8;
    break;
  case MYSQL_TYPE_TIME:
    param->fetch_result= fetch_result_time;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_DATE:
    param->fetch_result= fetch_result_date;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
    param->fetch_result= fetch_result_datetime;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
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  case MYSQL_TYPE_BIT:
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    DBUG_ASSERT(param->buffer_length != 0);
    param->fetch_result= fetch_result_bin;
    break;
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
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  case MYSQL_TYPE_DECIMAL:
  case MYSQL_TYPE_NEWDECIMAL:
4312
  case MYSQL_TYPE_NEWDATE:
4313 4314 4315 4316
    DBUG_ASSERT(param->buffer_length != 0);
    param->fetch_result= fetch_result_str;
    break;
  default:
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    DBUG_PRINT("error", ("Unknown param->buffer_type: %u",
                         (uint) param->buffer_type));
    DBUG_RETURN(TRUE);
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  }
  if (! is_binary_compatible(param->buffer_type, field->type))
    param->fetch_result= fetch_result_with_conversion;

  /* Setup skip_result functions (to calculate max_length) */
  param->skip_result= skip_result_fixed;
  switch (field->type) {
  case MYSQL_TYPE_NULL: /* for dummy binds */
    param->pack_length= 0;
    field->max_length= 0;
    break;
  case MYSQL_TYPE_TINY:
    param->pack_length= 1;
    field->max_length= 4;                     /* as in '-127' */
    break;
  case MYSQL_TYPE_YEAR:
  case MYSQL_TYPE_SHORT:
    param->pack_length= 2;
    field->max_length= 6;                     /* as in '-32767' */
    break;
  case MYSQL_TYPE_INT24:
    field->max_length= 9;  /* as in '16777216' or in '-8388607' */
    param->pack_length= 4;
    break;
  case MYSQL_TYPE_LONG:
    field->max_length= 11;                    /* '-2147483647' */
    param->pack_length= 4;
    break;
  case MYSQL_TYPE_LONGLONG:
    field->max_length= 21;                    /* '18446744073709551616' */
    param->pack_length= 8;
    break;
  case MYSQL_TYPE_FLOAT:
    param->pack_length= 4;
    field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_DOUBLE:
    param->pack_length= 8;
    field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_TIME:
    field->max_length= 15;                    /* 19:23:48.123456 */
    param->skip_result= skip_result_with_length;
  case MYSQL_TYPE_DATE:
    field->max_length= 10;                    /* 2003-11-11 */
    param->skip_result= skip_result_with_length;
    break;
    break;
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
    param->skip_result= skip_result_with_length;
    field->max_length= MAX_DATE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_DECIMAL:
4374
  case MYSQL_TYPE_NEWDECIMAL:
4375 4376 4377 4378 4379 4380 4381 4382 4383
  case MYSQL_TYPE_ENUM:
  case MYSQL_TYPE_SET:
  case MYSQL_TYPE_GEOMETRY:
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
ramil@mysql.com's avatar
ramil@mysql.com committed
4384
  case MYSQL_TYPE_BIT:
4385
  case MYSQL_TYPE_NEWDATE:
4386 4387 4388
    param->skip_result= skip_result_string;
    break;
  default:
4389 4390
    DBUG_PRINT("error", ("Unknown field->type: %u", (uint) field->type));
    DBUG_RETURN(TRUE);
4391
  }
4392
  DBUG_RETURN(FALSE);
4393 4394 4395
}


4396
/*
4397
  Setup the bind buffers for resultset processing
4398 4399
*/

4400
my_bool STDCALL mysql_stmt_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *my_bind)
4401
{
4402
  MYSQL_BIND *param, *end;
4403
  MYSQL_FIELD *field;
4404
  ulong       bind_count= stmt->field_count;
4405
  uint        param_count= 0;
4406
  DBUG_ENTER("mysql_stmt_bind_result");
4407
  DBUG_PRINT("enter",("field_count: %lu", bind_count));
4408

4409
  if (!bind_count)
4410
  {
4411 4412 4413 4414
    int errorcode= (int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE ?
                   CR_NO_PREPARE_STMT : CR_NO_STMT_METADATA;
    set_stmt_error(stmt, errorcode, unknown_sqlstate);
    DBUG_RETURN(1);
4415 4416 4417 4418 4419
  }

  /*
    We only need to check that stmt->field_count - if it is not null
    stmt->bind was initialized in mysql_stmt_prepare
4420 4421 4422
    stmt->bind overlaps with bind if mysql_stmt_bind_param
    is called from mysql_stmt_store_result.
  */
4423

4424 4425 4426
  if (stmt->bind != my_bind)
    memcpy((char*) stmt->bind, (char*) my_bind,
           sizeof(MYSQL_BIND) * bind_count);
4427

4428 4429 4430
  for (param= stmt->bind, end= param + bind_count, field= stmt->fields ;
       param < end ;
       param++, field++)
4431
  {
4432 4433
    DBUG_PRINT("info",("buffer_type: %u  field_type: %u",
                       (uint) param->buffer_type, (uint) field->type));
4434 4435
    /*
      Set param->is_null to point to a dummy variable if it's not set.
4436
      This is to make the execute code easier
4437 4438
    */
    if (!param->is_null)
4439
      param->is_null= &param->is_null_value;
4440

4441
    if (!param->length)
4442 4443 4444 4445
      param->length= &param->length_value;

    if (!param->error)
      param->error= &param->error_value;
4446

4447
    param->param_number= param_count++;
4448 4449
    param->offset= 0;

4450 4451
    if (setup_one_fetch_function(param, field))
    {
4452 4453
      strmov(stmt->sqlstate, unknown_sqlstate);
      sprintf(stmt->last_error,
4454 4455
              ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
              field->type, param_count);
4456 4457
      DBUG_RETURN(1);
    }
4458
  }
4459 4460 4461 4462
  stmt->bind_result_done= BIND_RESULT_DONE;
  if (stmt->mysql->options.report_data_truncation)
    stmt->bind_result_done|= REPORT_DATA_TRUNCATION;

4463 4464 4465
  DBUG_RETURN(0);
}

4466

4467
/*
4468
  Fetch row data to bind buffers
4469 4470
*/

4471
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
4472
{
4473
  MYSQL_BIND  *my_bind, *end;
4474
  MYSQL_FIELD *field;
4475
  uchar *null_ptr, bit;
4476
  int truncation_count= 0;
4477 4478 4479 4480 4481 4482
  /*
    Precondition: if stmt->field_count is zero or row is NULL, read_row_*
    function must return no data.
  */
  DBUG_ASSERT(stmt->field_count);
  DBUG_ASSERT(row);
4483

4484 4485 4486
  if (!stmt->bind_result_done)
  {
    /* If output parameters were not bound we should just return success */
4487
    return 0;
4488
  }
4489 4490

  null_ptr= row;
4491 4492
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */
4493

venu@myvenu.com's avatar
venu@myvenu.com committed
4494
  /* Copy complete row to application buffers */
4495 4496 4497 4498
  for (my_bind= stmt->bind, end= my_bind + stmt->field_count,
         field= stmt->fields ;
       my_bind < end ;
       my_bind++, field++)
4499
  {
4500
    *my_bind->error= 0;
4501
    if (*null_ptr & bit)
4502 4503
    {
      /*
4504
        We should set both row_ptr and is_null to be able to see
4505 4506 4507 4508 4509
        nulls in mysql_stmt_fetch_column. This is because is_null may point
        to user data which can be overwritten between mysql_stmt_fetch and
        mysql_stmt_fetch_column, and in this case nullness of column will be
        lost. See mysql_stmt_fetch_column for details.
      */
4510 4511
      my_bind->row_ptr= NULL;
      *my_bind->is_null= 1;
4512
    }
4513
    else
4514
    {
4515 4516 4517 4518
      *my_bind->is_null= 0;
      my_bind->row_ptr= row;
      (*my_bind->fetch_result)(my_bind, field, &row);
      truncation_count+= *my_bind->error;
4519
    }
4520
    if (!((bit<<=1) & 255))
4521
    {
4522
      bit= 1;					/* To next byte */
4523
      null_ptr++;
4524 4525
    }
  }
4526 4527
  if (truncation_count && (stmt->bind_result_done & REPORT_DATA_TRUNCATION))
    return MYSQL_DATA_TRUNCATED;
4528 4529 4530
  return 0;
}

4531

4532
int cli_unbuffered_fetch(MYSQL *mysql, char **row)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4533
{
4534
  if (packet_error == cli_safe_read(mysql))
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4535 4536
    return 1;

4537 4538
  *row= ((mysql->net.read_pos[0] == 254) ? NULL :
	 (char*) (mysql->net.read_pos+1));
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4539 4540
  return 0;
}
4541

4542

4543
/*
4544
  Fetch and return row data to bound buffers, if any
4545 4546
*/

4547
int STDCALL mysql_stmt_fetch(MYSQL_STMT *stmt)
4548
{
4549
  int rc;
4550
  uchar *row;
4551
  DBUG_ENTER("mysql_stmt_fetch");
4552

4553
  if ((rc= (*stmt->read_row_func)(stmt, &row)) ||
4554
      ((rc= stmt_fetch_row(stmt, row)) && rc != MYSQL_DATA_TRUNCATED))
4555
  {
4556
    stmt->state= MYSQL_STMT_PREPARE_DONE;       /* XXX: this is buggy */
4557 4558
    stmt->read_row_func= (rc == MYSQL_NO_DATA) ? 
      stmt_read_row_no_data : stmt_read_row_no_result_set;
4559
  }
4560
  else
4561
  {
4562 4563
    /* This is to know in mysql_stmt_fetch_column that data was fetched */
    stmt->state= MYSQL_STMT_FETCH_DONE;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4564
  }
4565
  DBUG_RETURN(rc);
4566 4567
}

4568

4569
/*
4570
  Fetch data for one specified column data
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4571 4572

  SYNOPSIS
4573
    mysql_stmt_fetch_column()
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4574
    stmt		Prepared statement handler
4575
    my_bind		Where data should be placed. Should be filled in as
4576
			when calling mysql_stmt_bind_result()
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4577 4578 4579
    column		Column to fetch (first column is 0)
    ulong offset	Offset in result data (to fetch blob in pieces)
			This is normally 0
4580
  RETURN
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4581 4582
    0	ok
    1	error
4583 4584
*/

4585
int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *my_bind,
4586
                                    uint column, ulong offset)
4587
{
4588
  MYSQL_BIND *param= stmt->bind+column;
4589
  DBUG_ENTER("mysql_stmt_fetch_column");
4590

4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601
  if ((int) stmt->state < (int) MYSQL_STMT_FETCH_DONE)
  {
    set_stmt_error(stmt, CR_NO_DATA, unknown_sqlstate);
    return 1;
  }
  if (column >= stmt->field_count)
  {
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
    DBUG_RETURN(1);
  }

4602 4603 4604
  if (!my_bind->error)
    my_bind->error= &my_bind->error_value;
  *my_bind->error= 0;
4605
  if (param->row_ptr)
4606
  {
4607
    MYSQL_FIELD *field= stmt->fields+column;
4608
    uchar *row= param->row_ptr;
4609 4610 4611 4612 4613
    my_bind->offset= offset;
    if (my_bind->is_null)
      *my_bind->is_null= 0;
    if (my_bind->length) /* Set the length if non char/binary types */
      *my_bind->length= *param->length;
4614
    else
4615 4616
      my_bind->length= &param->length_value;       /* Needed for fetch_result() */
    fetch_result_with_conversion(my_bind, field, &row);
4617
  }
4618 4619
  else
  {
4620 4621
    if (my_bind->is_null)
      *my_bind->is_null= 1;
4622
  }
4623 4624 4625 4626
  DBUG_RETURN(0);
}


4627
/*
4628 4629 4630
  Read all rows of data from server  (binary format)
*/

4631
int cli_read_binary_rows(MYSQL_STMT *stmt)
4632 4633 4634 4635
{
  ulong      pkt_len;
  uchar      *cp;
  MYSQL      *mysql= stmt->mysql;
4636 4637
  MYSQL_DATA *result= &stmt->result;
  MYSQL_ROWS *cur, **prev_ptr= &result->data;
4638 4639
  NET        *net;

4640 4641
  DBUG_ENTER("cli_read_binary_rows");

4642 4643 4644
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
4645
    DBUG_RETURN(1);
4646 4647 4648
  }

  net = &mysql->net;
4649
  mysql= mysql->last_used_con;
4650

4651
  while ((pkt_len= cli_safe_read(mysql)) != packet_error)
4652
  {
4653 4654
    cp= net->read_pos;
    if (cp[0] != 254 || pkt_len >= 8)
4655
    {
4656 4657 4658 4659
      if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
                                          sizeof(MYSQL_ROWS) + pkt_len - 1)))
      {
        set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
4660
        goto err;
4661 4662 4663 4664 4665
      }
      cur->data= (MYSQL_ROW) (cur+1);
      *prev_ptr= cur;
      prev_ptr= &cur->next;
      memcpy((char *) cur->data, (char *) cp+1, pkt_len-1);
4666 4667
      cur->length= pkt_len;		/* To allow us to do sanity checks */
      result->rows++;
4668
    }
4669
    else
4670
    {
4671 4672 4673 4674
      /* end of data */
      *prev_ptr= 0;
      mysql->warning_count= uint2korr(cp+1);
      mysql->server_status= uint2korr(cp+3);
4675 4676
      DBUG_PRINT("info",("status: %u  warning_count: %u",
                         mysql->server_status, mysql->warning_count));
4677 4678 4679
      DBUG_RETURN(0);
    }
  }
4680
  set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
4681 4682

err:
4683
  DBUG_RETURN(1);
4684 4685
}

4686

4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700
/*
  Update meta data for statement

  SYNOPSIS
    stmt_update_metadata()
    stmt			Statement handler
    row				Binary data

  NOTES
    Only updates MYSQL_FIELD->max_length for strings
*/

static void stmt_update_metadata(MYSQL_STMT *stmt, MYSQL_ROWS *data)
{
4701
  MYSQL_BIND  *my_bind, *end;
4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712
  MYSQL_FIELD *field;
  uchar *null_ptr, bit;
  uchar *row= (uchar*) data->data;
#ifndef DBUG_OFF
  uchar *row_end= row + data->length;
#endif

  null_ptr= row;
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */

4713
  /* Go through all fields and calculate metadata */
4714 4715 4716
  for (my_bind= stmt->bind, end= my_bind + stmt->field_count, field= stmt->fields ;
       my_bind < end ;
       my_bind++, field++)
4717 4718
  {
    if (!(*null_ptr & bit))
4719
      (*my_bind->skip_result)(my_bind, field, &row);
4720 4721 4722 4723 4724 4725 4726 4727 4728 4729
    DBUG_ASSERT(row <= row_end);
    if (!((bit<<=1) & 255))
    {
      bit= 1;					/* To next byte */
      null_ptr++;
    }
  }
}


4730 4731 4732 4733 4734 4735 4736
/*
  Store or buffer the binary results to stmt
*/

int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
  MYSQL *mysql= stmt->mysql;
4737
  MYSQL_DATA *result= &stmt->result;
4738
  DBUG_ENTER("mysql_stmt_store_result");
4739 4740 4741 4742 4743

  mysql= mysql->last_used_con;

  if (!stmt->field_count)
    DBUG_RETURN(0);
4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764

  if ((int) stmt->state < (int) MYSQL_STMT_EXECUTE_DONE)
  {
    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
    DBUG_RETURN(1);
  }

  if (mysql->status == MYSQL_STATUS_READY &&
      stmt->server_status & SERVER_STATUS_CURSOR_EXISTS)
  {
    /*
      Server side cursor exist, tell server to start sending the rows
    */
    NET *net= &mysql->net;
    char buff[4 /* statement id */ +
              4 /* number of rows to fetch */];

    /* Send row request to the server */
    int4store(buff, stmt->stmt_id);
    int4store(buff + 4, (int)~0); /* number of rows to fetch */
    if (cli_advanced_command(mysql, COM_STMT_FETCH, buff, sizeof(buff),
4765
                             NullS, 0, 1, NULL))
4766 4767 4768 4769 4770 4771
    {
      set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
      DBUG_RETURN(1);
    }
  }
  else if (mysql->status != MYSQL_STATUS_GET_RESULT)
4772
  {
4773
    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
4774
    DBUG_RETURN(1);
4775
  }
4776

4777 4778 4779 4780 4781 4782
  if (stmt->update_max_length && !stmt->bind_result_done)
  {
    /*
      We must initalize the bind structure to be able to calculate
      max_length
    */
4783
    MYSQL_BIND  *my_bind, *end;
4784 4785 4786
    MYSQL_FIELD *field;
    bzero((char*) stmt->bind, sizeof(*stmt->bind)* stmt->field_count);

4787 4788 4789 4790
    for (my_bind= stmt->bind, end= my_bind + stmt->field_count,
           field= stmt->fields;
	 my_bind < end ;
	 my_bind++, field++)
4791
    {
4792 4793
      my_bind->buffer_type= MYSQL_TYPE_NULL;
      my_bind->buffer_length=1;
4794 4795
    }

4796 4797
    if (mysql_stmt_bind_result(stmt, stmt->bind))
      DBUG_RETURN(1);
4798 4799 4800
    stmt->bind_result_done= 0;			/* No normal bind done */
  }

4801
  if ((*mysql->methods->read_binary_rows)(stmt))
4802
  {
4803 4804 4805
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
4806
    mysql->status= MYSQL_STATUS_READY;
4807
    DBUG_RETURN(1);
4808
  }
4809

4810 4811 4812 4813
  /* Assert that if there was a cursor, all rows have been fetched */
  DBUG_ASSERT(mysql->status != MYSQL_STATUS_READY ||
              (mysql->server_status & SERVER_STATUS_LAST_ROW_SENT));

4814 4815 4816 4817 4818 4819 4820
  if (stmt->update_max_length)
  {
    MYSQL_ROWS *cur= result->data;
    for(; cur; cur=cur->next)
      stmt_update_metadata(stmt, cur);
  }

4821 4822
  stmt->data_cursor= result->data;
  mysql->affected_rows= stmt->affected_rows= result->rows;
4823 4824 4825
  stmt->read_row_func= stmt_read_row_buffered;
  mysql->unbuffered_fetch_owner= 0;             /* set in stmt_execute */
  mysql->status= MYSQL_STATUS_READY;		/* server is ready */
4826
  DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_stmt_fetch() */
4827 4828
}

4829

4830 4831 4832 4833 4834 4835 4836
/*
  Seek to desired row in the statement result set
*/

MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
4837
  MYSQL_ROW_OFFSET offset= stmt->data_cursor;
4838
  DBUG_ENTER("mysql_stmt_row_seek");
4839

4840 4841
  stmt->data_cursor= row;
  DBUG_RETURN(offset);
4842 4843
}

4844

4845 4846 4847 4848
/*
  Return the current statement row cursor position
*/

4849
MYSQL_ROW_OFFSET STDCALL
4850 4851 4852
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_row_tell");
4853

4854
  DBUG_RETURN(stmt->data_cursor);
4855 4856
}

4857

4858 4859 4860 4861 4862 4863 4864
/*
  Move the stmt result set data cursor to specified row
*/

void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
4865
  MYSQL_ROWS *tmp= stmt->result.data;
4866 4867
  DBUG_ENTER("mysql_stmt_data_seek");
  DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
4868

4869 4870 4871
  for (; tmp && row; --row, tmp= tmp->next)
    ;
  stmt->data_cursor= tmp;
4872 4873 4874 4875 4876 4877
  if (!row && tmp)
  {
       /*  Rewind the counter */
    stmt->read_row_func= stmt_read_row_buffered;
    stmt->state= MYSQL_STMT_EXECUTE_DONE;
  }
4878
  DBUG_VOID_RETURN;
4879 4880
}

4881

4882 4883 4884 4885 4886 4887 4888
/*
  Return total rows the current statement result set
*/

my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_num_rows");
4889

4890
  DBUG_RETURN(stmt->result.rows);
4891
}
4892

4893

4894 4895 4896 4897 4898
/*
  Free the client side memory buffers, reset long data state
  on client if necessary, and reset the server side statement if
  this has been requested.
*/
4899

4900 4901 4902
static my_bool reset_stmt_handle(MYSQL_STMT *stmt, uint flags)
{
  /* If statement hasn't been prepared there is nothing to reset */
4903 4904 4905
  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    MYSQL *mysql= stmt->mysql;
4906
    MYSQL_DATA *result= &stmt->result;
4907

4908 4909 4910 4911
    /*
      Reset stored result set if so was requested or it's a part
      of cursor fetch.
    */
4912
    if (flags & RESET_STORE_RESULT)
4913 4914
    {
      /* Result buffered */
4915 4916 4917 4918
      free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
      result->data= NULL;
      result->rows= 0;
      stmt->data_cursor= NULL;
4919
    }
4920
    if (flags & RESET_LONG_DATA)
4921
    {
4922 4923 4924 4925 4926
      MYSQL_BIND *param= stmt->params, *param_end= param + stmt->param_count;
      /* Clear long_data_used flags */
      for (; param < param_end; param++)
        param->long_data_used= 0;
    }
4927
    stmt->read_row_func= stmt_read_row_no_result_set;
4928 4929 4930
    if (mysql)
    {
      if ((int) stmt->state > (int) MYSQL_STMT_PREPARE_DONE)
4931
      {
4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942
        if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
          mysql->unbuffered_fetch_owner= 0;
        if (stmt->field_count && mysql->status != MYSQL_STATUS_READY)
        {
          /* There is a result set and it belongs to this statement */
          (*mysql->methods->flush_use_result)(mysql);
          if (mysql->unbuffered_fetch_owner)
            *mysql->unbuffered_fetch_owner= TRUE;
          mysql->status= MYSQL_STATUS_READY;
        }
      }
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      if (flags & RESET_SERVER_SIDE)
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      {
        /*
          Reset the server side statement and close the server side
          cursor if it exists.
        */
        char buff[MYSQL_STMT_HEADER]; /* packet header: 4 bytes for stmt id */
        int4store(buff, stmt->stmt_id);
4951
        if ((*mysql->methods->advanced_command)(mysql, COM_STMT_RESET, buff,
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4952
                                                sizeof(buff), 0, 0, 0, NULL))
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        {
          set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                          mysql->net.sqlstate);
          stmt->state= MYSQL_STMT_INIT_DONE;
          return 1;
        }
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        stmt_clear_error(stmt);
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      }
    }
    stmt->state= MYSQL_STMT_PREPARE_DONE;
  }
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  return 0;
}

my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_free_result");

  /* Free the client side and close the server side cursor if there is one */
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  DBUG_RETURN(reset_stmt_handle(stmt, RESET_LONG_DATA | RESET_STORE_RESULT));
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}

4975
/********************************************************************
4976
 statement error handling and close
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*********************************************************************/
4978

4979
/*
4980
  Close the statement handle by freeing all alloced resources
4981

4982
  SYNOPSIS
4983
    mysql_stmt_close()
4984
    stmt	       Statement handle
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  RETURN VALUES
    0	ok
    1	error
*/
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my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
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{
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  MYSQL *mysql= stmt->mysql;
  int rc= 0;
  DBUG_ENTER("mysql_stmt_close");
4996

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  free_root(&stmt->result.alloc, MYF(0));
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  free_root(&stmt->mem_root, MYF(0));

  if (mysql)
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  {
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    mysql->stmts= list_delete(mysql->stmts, &stmt->list);
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    /*
      Clear NET error state: if the following commands come through
      successfully, connection will still be usable for other commands.
    */
    net_clear_error(&mysql->net);
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    if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
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    {
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      char buff[MYSQL_STMT_HEADER];             /* 4 bytes - stmt id */
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      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
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        /*
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          Flush result set of the connection. If it does not belong
          to this statement, set a warning.
        */
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        (*mysql->methods->flush_use_result)(mysql);
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        if (mysql->unbuffered_fetch_owner)
          *mysql->unbuffered_fetch_owner= TRUE;
        mysql->status= MYSQL_STATUS_READY;
      }
      int4store(buff, stmt->stmt_id);
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      if ((rc= stmt_command(mysql, COM_STMT_CLOSE, buff, 4, stmt)))
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      {
        set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                        mysql->net.sqlstate);
      }
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    }
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  }
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  my_free((gptr) stmt, MYF(MY_WME));
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  DBUG_RETURN(test(rc));
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}

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/*
  Reset the statement buffers in server
*/

my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_reset");
  DBUG_ASSERT(stmt != 0);
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  if (!stmt->mysql)
  {
    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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    DBUG_RETURN(1);
  }
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  /* Reset the client and server sides of the prepared statement */
  DBUG_RETURN(reset_stmt_handle(stmt, RESET_SERVER_SIDE | RESET_LONG_DATA));
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}

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/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
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  DBUG_RETURN(stmt->last_errno);
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}

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const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_sqlstate");
  DBUG_RETURN(stmt->sqlstate);
}

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/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
5080
  DBUG_RETURN(stmt->last_error);
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}

5083

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/********************************************************************
 Transactional APIs
*********************************************************************/

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/*
  Commit the current transaction
*/

5092
my_bool STDCALL mysql_commit(MYSQL * mysql)
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{
  DBUG_ENTER("mysql_commit");
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  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
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}

/*
5099
  Rollback the current transaction
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*/

5102
my_bool STDCALL mysql_rollback(MYSQL * mysql)
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{
  DBUG_ENTER("mysql_rollback");
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  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
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}


/*
  Set autocommit to either true or false
*/

5113
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
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{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

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  DBUG_RETURN((my_bool) mysql_real_query(mysql, auto_mode ?
                                         "set autocommit=1":"set autocommit=0",
                                         16));
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}
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/********************************************************************
5125
 Multi query execution + SPs APIs
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*********************************************************************/

/*
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  Returns true/false to indicate whether any more query results exist
  to be read using mysql_next_result()
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*/

my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
5135
  my_bool res;
5136
  DBUG_ENTER("mysql_more_results");
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  res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
5139
	1: 0);
5140
  DBUG_PRINT("exit",("More results exists ? %d", res));
5141
  DBUG_RETURN(res);
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}

5144

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/*
  Reads and returns the next query results
*/
5148
int STDCALL mysql_next_result(MYSQL *mysql)
5149
{
5150
  DBUG_ENTER("mysql_next_result");
5151

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  if (mysql->status != MYSQL_STATUS_READY)
  {
    strmov(mysql->net.sqlstate, unknown_sqlstate);
    strmov(mysql->net.last_error,
	   ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
    DBUG_RETURN(1);
  }

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  mysql->net.last_error[0]= 0;
  mysql->net.last_errno= 0;
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  strmov(mysql->net.sqlstate, not_error_sqlstate);
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  mysql->affected_rows= ~(my_ulonglong) 0;

  if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
5166 5167
    DBUG_RETURN((*mysql->methods->next_result)(mysql));

5168
  DBUG_RETURN(-1);				/* No more results */
5169
}
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5170

5171

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MYSQL_RES * STDCALL mysql_use_result(MYSQL *mysql)
{
  return (*mysql->methods->use_result)(mysql);
}

my_bool STDCALL mysql_read_query_result(MYSQL *mysql)
{
  return (*mysql->methods->read_query_result)(mysql);
}