libmysql.c 111 KB
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/* Copyright (C) 2000-2003 MySQL AB
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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   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>
#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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ulong 		net_buffer_length=8192;
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ulong		max_allowed_packet= 1024L*1024L*1024L;
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ulong		net_read_timeout=  CLIENT_NET_READ_TIMEOUT;
ulong		net_write_timeout= CLIENT_NET_WRITE_TIMEOUT;
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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 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;
	if ((serv_ptr = getservbyname("mysql", "tcp")))
	  mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
	if ((env = getenv("MYSQL_TCP_PORT")))
	  mysql_port =(uint) atoi(env);
      }
#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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    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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void STDCALL mysql_server_end()
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{
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#ifdef EMBEDDED_LIBRARY
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  end_embedded_server();
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#endif
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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(0);
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#ifndef THREAD
  /* Remove TRACING, if enabled by mysql_debug() */
    DBUG_POP();
#endif
  }
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  else
    mysql_thread_end();
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  mysql_client_init= org_my_init_done= 0;
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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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pipe_sig_handler(int sig __attribute__((unused)))
{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
  (void) signal(SIGPIPE,pipe_sig_handler);
#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);
  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);
  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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  }

  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
**************************************************************************/
596

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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));
    }
    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;

  pkt_length= net_safe_read(mysql);
  
  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 */
    if (net_safe_read(mysql) == packet_error)
      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[512],*end=buff;
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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=strmov(end,user)+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= strmov(end, db ? db : "") + 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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  if ((*mysql->methods->read_change_user_result)(mysql, buff, passwd))
    DBUG_RETURN(1);
693
  /* Free old connect information */
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  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));

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  /* alloc new connect information */
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  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(0);
}

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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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  {
    my_net_write(net,"",0);		/* Server needs one packet */
    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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  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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/**************************************************************************
  Get column lengths of the current row
  If one uses mysql_use_result, res->lengths contains the length information,
  else the lengths are calculated from the offset between pointers.
**************************************************************************/

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ulong * STDCALL
mysql_fetch_lengths(MYSQL_RES *res)
{
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  MYSQL_ROW column;
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  if (!(column=res->current_row))
    return 0;					/* Something is wrong */
  if (res->data)
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    (*res->methods->fetch_lengths)(res->lengths, column, res->field_count);
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  return res->lengths;
}

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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 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))
    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)
{
  DBUG_ENTER("mysql_ping");
  DBUG_RETURN(simple_command(mysql,COM_PING,0,0,0));
}


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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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/*
  Get version number for server in a form easy to test on

  SYNOPSIS
    mysql_get_server_version()
    mysql		Connection

  EXAMPLE
    4.1.0-alfa ->  40100
  
  NOTES
    We will ensure that a newer server always has a bigger number.

  RETURN
   Signed number > 323000
*/

ulong STDCALL
mysql_get_server_version(MYSQL *mysql)
{
  uint major, minor, version;
  char *pos= mysql->server_version, *end_pos;
  major=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  minor=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  version= (uint) strtoul(pos, &end_pos, 10);
  return (ulong) major*10000L+(ulong) (minor*100+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)
{
  return mysql->net.sqlstate;
}

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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)
{
  return mysql->charset->name;
}


uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

/****************************************************************************
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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;
  net->read_timeout= (uint) net_read_timeout;
  net->write_timeout=(uint) 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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/*
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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, 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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  return escape_string_for_mysql(mysql->charset, to, from, length);
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}


char * STDCALL
mysql_odbc_escape_string(MYSQL *mysql,
			 char *to, ulong to_length,
			 const char *from, ulong from_length,
			 void *param,
			 char * (*extend_buffer)
			 (void *, char *, ulong *))
{
  char *to_end=to+to_length-5;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
#endif

  for (end=from+from_length; from != end ; from++)
  {
    if (to >= to_end)
    {
      to_length = (ulong) (end-from)+512;	/* We want this much more */
      if (!(to=(*extend_buffer)(param, to, &to_length)))
	return to;
      to_end=to+to_length-5;
    }
#ifdef USE_MB
    {
      int l;
      if (use_mb_flag && (l = my_ismbchar(mysql->charset, from, end)))
      {
	while (l--)
	  *to++ = *from++;
	from--;
	continue;
      }
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  return to;
}

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;
}
1641 1642

/********************************************************************
1643
 Implementation of new client API for 4.1 version.
1644

1645
 mysql_stmt_* are real prototypes used by applications.
1646

1647 1648 1649 1650 1651
 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.
1652 1653
*********************************************************************/

1654
/******************* Declarations ***********************************/
1655

1656

1657
/*
1658 1659 1660 1661 1662
  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)
1663 1664
*/

1665 1666 1667
static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_no_data(MYSQL_STMT *stmt, unsigned char **row);
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1669 1670 1671 1672 1673
/*
  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);
1674

1675 1676 1677 1678 1679 1680
/*
  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) */
1681
#define MAX_DATE_REP_LENGTH 5
1682 1683 1684 1685 1686

/*
  1 (length) + 1 (is negative) + 4 (day count) + 1 (hour)
  + 1 (minute) + 1 (seconds) + 4 (microseconds)
*/
1687
#define MAX_TIME_REP_LENGTH 13
1688 1689 1690 1691 1692

/*
  1 (length) + 2 (year) + 1 (month) + 1 (day) +
  1 (hour) + 1 (minute) + 1 (second) + 4 (microseconds)
*/
1693
#define MAX_DATETIME_REP_LENGTH 12
1694 1695


1696
/**************** Misc utility functions ****************************/
1697 1698

/*
1699
  Reallocate the NET package to be at least of 'length' bytes
1700

1701 1702
  SYNPOSIS
   my_realloc_str()
1703 1704
   net                 The NET structure to modify
   length              Ensure that net->buff is at least this big
1705

1706 1707 1708
  RETURN VALUES
  0	ok
  1	Error
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*/

1711
static my_bool my_realloc_str(NET *net, ulong length)
1712
{
1713 1714 1715 1716
  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)
1717
  {
1718 1719
    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
1720
  }
1721
  DBUG_RETURN(res);
1722 1723 1724
}


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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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1764
/*
1765 1766
  Read and unpack server reply to COM_PREPARE command (sent from
  mysql_stmt_prepare).
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1768 1769 1770 1771
  SYNOPSIS
    cli_read_prepare_result()
    mysql   connection handle
    stmt    statement handle
1772 1773 1774 1775

  RETURN VALUES
    0	ok
    1	error
1776 1777
*/

1778
my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
1779 1780
{
  uchar *pos;
1781
  uint field_count, param_count;
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  MYSQL_DATA *fields_data;
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  DBUG_ENTER("read_prepare_result");
1784

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  mysql= mysql->last_used_con;
1786
  if (net_safe_read(mysql) == packet_error)
1787
    DBUG_RETURN(1);
1788

1789
  pos= (uchar*) mysql->net.read_pos;
1790
  stmt->stmt_id= uint4korr(pos+1); pos+= 5;
1791
  /* Number of columns in result set */
1792
  field_count=   uint2korr(pos);   pos+= 2;
1793
  /* Number of placeholders in the statement */
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  param_count=   uint2korr(pos);   pos+= 2;
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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);
  }

1806 1807 1808 1809
  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
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1811
    mysql->extra_info= net_field_length_ll(&pos);
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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=  (uint) field_count;
  stmt->param_count=  (ulong) param_count;
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  DBUG_RETURN(0);
}

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#ifdef HAVE_DEPRECATED_411_API
MYSQL_STMT * STDCALL mysql_prepare(MYSQL *mysql, const char *query,
                                   unsigned long query_length)
{
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  MYSQL_STMT *stmt;
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  DBUG_ENTER("mysql_prepare");

1832
  stmt= mysql_stmt_init(mysql);
1833 1834
  if (stmt && mysql_stmt_prepare(stmt, query, query_length))
  {
1835
    mysql_stmt_close(stmt);
1836 1837 1838 1839 1840
    DBUG_RETURN(0);
  }
  DBUG_RETURN(stmt);
}
#endif
1841 1842

/*
1843 1844
  Allocate memory and init prepared statement structure.

1845 1846
  SYNOPSIS
    mysql_stmt_init()
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
    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
    handle provided to this call: it's lifetime is limited by lifetime
    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()),
    - close statement handle and free it's memory (mysql_stmt_close()),
    - 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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1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885
  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);
  }

1886
  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;
1892
  stmt->mysql= mysql;
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  stmt->read_row_func= stmt_read_row_no_data;
  /* The rest of statement members was bzeroed inside malloc */
1895 1896 1897 1898

  DBUG_RETURN(stmt);
}

1899

1900
/*
1901 1902
  Prepare server side statement with query.

1903 1904
  SYNOPSIS
    mysql_stmt_prepare()
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    stmt    statement handle
    query   statement to prepare
    length  statement length
1908 1909

  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
1923
    structure on the server and free old statement data
1924
  - then send the query to server and get back number of placeholders,
1925
    number of columns in result set (if any), and result set metadata.
1926
    At the same time allocate memory for input and output parameters
1927
    to have less checks in mysql_stmt_bind_{param, result}.
1928

1929 1930
  RETURN VALUES
    0  success
1931
   !0  error
1932 1933
*/

1934 1935
int STDCALL
mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query, ulong length)
1936
{
1937 1938 1939
  MYSQL *mysql= stmt->mysql;
  DBUG_ENTER("mysql_stmt_prepare");

1940
  if (!mysql)
1941
  {
1942 1943
    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
1944
    DBUG_RETURN(1);
1945
  }
1946 1947 1948 1949

  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    /* This is second prepare with another statement */
1950
    char buff[MYSQL_STMT_HEADER];               /* 4 bytes - stmt id */
1951 1952 1953

    mysql_stmt_free_result(stmt);
    /*
1954
      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;
    stmt->last_errno= 0;
    stmt->last_error[0]= '\0';
    free_root(&stmt->mem_root, MYF(MY_KEEP_PREALLOC));

    int4store(buff, stmt->stmt_id);
    /*
      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.
    */
    if (simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1))
    {
      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                      mysql->net.sqlstate);
      DBUG_RETURN(1);
    }
    stmt->state= MYSQL_STMT_INIT_DONE;
  }

1978 1979
  if (simple_command(mysql, COM_PREPARE, query, length, 1))
  {
1980 1981 1982
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
1983 1984
  }

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  if ((*mysql->methods->read_prepare_result)(mysql, stmt))
1986 1987 1988
  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
1989
    DBUG_RETURN(1);
1990
  }
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1991

1992
  /*
1993
    alloc_root will return valid address even in case param_count
1994 1995 1996 1997
    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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1998 1999
  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
2000
                                                (stmt->param_count +
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2001 2002 2003
                                                 stmt->field_count))))
  {
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2004
    DBUG_RETURN(1);
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2005 2006
  }
  stmt->bind= stmt->params + stmt->param_count;
2007
  stmt->state= MYSQL_STMT_PREPARE_DONE;
2008
  DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
2009
  DBUG_RETURN(0);
2010 2011
}

2012
/*
2013 2014 2015 2016
  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.
2017 2018
*/

2019
static unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
2020
{
2021 2022
  MYSQL_FIELD *fields, *field, *end;
  MEM_ROOT *alloc= &stmt->mem_root;
2023
  MYSQL *mysql= stmt->mysql->last_used_con;
2024

2025
  stmt->field_count= mysql->field_count;
2026

2027
  /*
2028
    Get the field information for non-select statements
2029 2030
    like SHOW and DESCRIBE commands
  */
2031
  if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc,
2032
						 sizeof(MYSQL_FIELD) *
2033 2034
						 stmt->field_count)) ||
      !(stmt->bind= (MYSQL_BIND *) alloc_root(alloc,
2035 2036
					      sizeof(MYSQL_BIND) *
					      stmt->field_count)))
2037
    return 0;
2038 2039

  for (fields= mysql->fields, end= fields+stmt->field_count,
2040
	 field= stmt->fields;
2041 2042 2043 2044 2045 2046 2047
       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);
2048
    field->charsetnr= fields->charsetnr;
2049 2050 2051 2052 2053 2054 2055
    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;
  }
2056 2057
  return stmt->field_count;
}
2058

2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082

/*
  Update result set columns metadata if it was sent again in
  reply to COM_EXECUTE.
*/

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;

  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;
  }
}

2083
/*
2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
  Returns prepared statement metadata in the form of a result set.

  SYNOPSIS
    mysql_stmt_result_metadata()
    stmt  statement handle

  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

  DESCRIPTION
    This function should be used after mysql_stmt_execute().
    You can safely check that prepared statement has a result set by calling
    mysql_stmt_num_fields(): if number of fields is not zero, you can call
    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
      mysql_stmt_num_fields)
    - 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.
2109 2110 2111
*/

MYSQL_RES * STDCALL
2112
mysql_stmt_result_metadata(MYSQL_STMT *stmt)
2113 2114
{
  MYSQL_RES *result;
2115
  DBUG_ENTER("mysql_stmt_result_metadata");
2116

2117 2118 2119 2120 2121 2122 2123 2124 2125
  /*
    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))))
2126
  {
2127 2128 2129
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }
2130

2131 2132
  result->methods=	stmt->mysql->methods;
  result->eof=		1;                      /* Marker for buffered */
2133 2134
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
2135
  /* The rest of members of 'result' was bzeroed inside malloc */
2136
  DBUG_RETURN(result);
2137 2138
}

2139

2140
/*
2141 2142
  Returns parameter columns meta information in the form of
  result set.
2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155

  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.
2156 2157 2158
*/

MYSQL_RES * STDCALL
2159
mysql_stmt_param_metadata(MYSQL_STMT *stmt)
2160
{
2161
  DBUG_ENTER("mysql_stmt_param_metadata");
2162

2163 2164 2165 2166
  if (!stmt->param_count)
    DBUG_RETURN(0);

  /*
2167 2168
    TODO: Fix this when server sends the information.
    Till then keep a dummy prototype.
2169 2170 2171 2172 2173
  */
  DBUG_RETURN(0); 
}


2174 2175 2176 2177 2178 2179 2180 2181 2182 2183
/* 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;
}


2184 2185
/*
  Functions to store parameter data in network packet.
2186

2187 2188 2189 2190 2191
  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

2192 2193 2194 2195 2196 2197
  DESCRIPTION
    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).
2198
*/
2199 2200 2201 2202

static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
  *(net->write_pos++)= (uchar) *param->buffer;
2203 2204
}

2205 2206 2207 2208 2209 2210
static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
2211

2212
static void store_param_int32(NET *net, MYSQL_BIND *param)
2213
{
2214 2215 2216 2217
  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
2218

2219 2220 2221 2222 2223 2224
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
2225

2226 2227 2228 2229 2230
static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
2231 2232
}

2233 2234 2235 2236 2237 2238
static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
2239

2240 2241 2242
static void store_param_time(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
2243
  char buff[MAX_TIME_REP_LENGTH], *pos;
2244 2245 2246 2247 2248 2249 2250 2251 2252 2253
  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)
2254
    length= 12;
2255 2256 2257 2258
  else if (tm->hour || tm->minute || tm->second || tm->day)
    length= 8;
  else
    length= 0;
2259
  buff[0]= (char) length++;
2260 2261 2262 2263 2264 2265
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
2266
  char buff[MAX_DATETIME_REP_LENGTH], *pos;
2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285
  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;
2286
  buff[0]= (char) length++;
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void store_param_date(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  net_store_datetime(net, tm);
}

static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  net_store_datetime(net, tm);
}
2304

2305
static void store_param_str(NET *net, MYSQL_BIND *param)
2306
{
2307 2308
  /* param->length is always set in mysql_stmt_bind_param */
  ulong length= *param->length;
2309 2310
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
2311
  net->write_pos= (uchar*) to+length;
2312 2313
}

2314

2315
/*
2316 2317 2318 2319 2320 2321 2322 2323 2324
  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
2325 2326
    if a parameter is NULL. Unlike bit string in result set row, here
    we don't have reserved bits for OK/error packet.
2327 2328
*/

2329
static void store_param_null(NET *net, MYSQL_BIND *param)
2330
{
2331
  uint pos= param->param_number;
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2332
  net->buff[pos/8]|=  (uchar) (1 << (pos & 7));
2333
}
2334 2335 2336


/*
2337 2338 2339
  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.
2340 2341
*/

2342
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
2343
{
2344
  NET *net= &stmt->mysql->net;
2345
  DBUG_ENTER("store_param");
2346 2347 2348 2349 2350 2351
  DBUG_PRINT("enter",("type: %d, buffer:%lx, length: %lu  is_null: %d",
		      param->buffer_type,
		      param->buffer ? param->buffer : "0", *param->length,
		      *param->is_null));

  if (*param->is_null)
2352 2353
    store_param_null(net, param);
  else
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2354
  {
2355 2356
    /*
      Param->length should ALWAYS point to the correct length for the type
2357
      Either to the length pointer given by the user or param->buffer_length
2358
    */
2359
    if ((my_realloc_str(net, *param->length)))
2360
    {
2361
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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2362
      DBUG_RETURN(1);
2363
    }
2364
    (*param->store_param_func)(net, param);
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2365 2366
  }
  DBUG_RETURN(0);
2367 2368
}

2369

2370
/*
2371 2372
  Auxilary function to send COM_EXECUTE packet to server and read reply.
  Used from cli_stmt_execute, which is in turn used by mysql_stmt_execute.
2373 2374
*/

2375
static my_bool execute(MYSQL_STMT *stmt, char *packet, ulong length)
2376
{
2377 2378
  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
2379
  char buff[4 /* size of stmt id */ +
2380
            5 /* execution flags */];
2381
  DBUG_ENTER("execute");
2382 2383
  DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));

2384 2385
  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
2386 2387 2388 2389
  buff[4]= (char) 0;                            /* no flags */
  int4store(buff+5, 1);                         /* iteration count */
  if (cli_advanced_command(mysql, COM_EXECUTE, buff, sizeof(buff),
                           packet, length, 1) ||
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2390
      (*mysql->methods->read_query_result)(mysql))
2391
  {
2392
    set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
2393
    DBUG_RETURN(1);
2394
  }
2395
  stmt->affected_rows= mysql->affected_rows;
2396
  stmt->insert_id= mysql->insert_id;
2397 2398 2399
  DBUG_RETURN(0);
}

2400 2401

int cli_stmt_execute(MYSQL_STMT *stmt)
2402
{
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2403
  DBUG_ENTER("cli_stmt_execute");
2404 2405 2406

  if (stmt->param_count)
  {
2407 2408
    NET        *net= &stmt->mysql->net;
    MYSQL_BIND *param, *param_end;
2409
    char       *param_data;
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2410 2411 2412
    ulong length;
    uint null_count;
    my_bool    result;
2413

2414 2415 2416 2417 2418 2419
    if (!stmt->bind_param_done)
    {
      set_stmt_error(stmt, CR_PARAMS_NOT_BOUND, unknown_sqlstate);
      DBUG_RETURN(1);
    }

2420 2421 2422 2423 2424 2425 2426 2427
    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
    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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2428 2429
    *(net->write_pos)++= (uchar) stmt->send_types_to_server;
    if (stmt->send_types_to_server)
2430
    {
2431 2432 2433 2434 2435
      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
2436
        store_param_type((char**) &net->write_pos, param);
2437 2438 2439
    }

    for (param= stmt->params; param < param_end; param++)
2440
    {
2441
      /* check if mysql_stmt_send_long_data() was used */
2442 2443
      if (param->long_data_used)
	param->long_data_used= 0;	/* Clear for next execute call */
2444
      else if (store_param(stmt, param))
2445
	DBUG_RETURN(1);
2446
    }
2447 2448
    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
2449
    if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
2450
    {
2451
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2452
      DBUG_RETURN(1);
2453
    }
2454
    result= execute(stmt, param_data, length);
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2455
    stmt->send_types_to_server=0;
2456
    my_free(param_data, MYF(MY_WME));
2457 2458 2459
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
2460 2461
}

2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475
/*
  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)
{
2476
  if (stmt->data_cursor)
2477
  {
2478 2479
    *row= (uchar *) stmt->data_cursor->data;
    stmt->data_cursor= stmt->data_cursor->next;
2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
    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
2500
                  stmt->last_{errno,error}; *row is not changed
2501
  MYSQL_NO_DATA - end of file was read from network;
2502
                  *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;
2509
  /*
2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528
    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 ?
                   CR_FETCH_CANCELLED : CR_COMMANDS_OUT_OF_SYNC,
                   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);
2529 2530 2531 2532 2533 2534 2535
    /*
      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;
2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567
    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;
}

/*
  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)))
{
  if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
  {
    set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
    return 1;
  }
  return MYSQL_NO_DATA;
}

2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582

/*
  Get/set statement attributes

  SYNOPSIS
    mysql_stmt_attr_get()
    mysql_stmt_attr_set()

    attr_type  statemenet attribute
    value      casted to const void * pointer to value.

  RETURN VALUE
    0 success
   !0 wrong attribute type
*/
2583

2584 2585 2586 2587 2588 2589 2590 2591
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;
2592
  default:
2593 2594 2595 2596 2597 2598
    return TRUE;
  }
  return FALSE;
}


2599
my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
2600 2601 2602 2603 2604 2605
                                    enum enum_stmt_attr_type attr_type,
                                    void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
    *(unsigned long *) value= stmt->update_max_length;
2606
    break;
2607
  default:
2608 2609 2610 2611 2612 2613
    return TRUE;
  }
  return FALSE;
}


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2614
/*
2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655
  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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2656 2657
*/

2658
int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt)
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2659
{
2660
  MYSQL *mysql= stmt->mysql;
2661
  DBUG_ENTER("mysql_stmt_execute");
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2662

2663 2664 2665
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
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2666
    DBUG_RETURN(1);
2667 2668 2669 2670 2671 2672 2673 2674 2675
  }

  mysql_stmt_free_result(stmt);
  /*
    No need to check for stmt->state: if the statement wasn't
    prepared we'll get 'unknown statemenet handler' error from server.
  */
  if (mysql->methods->stmt_execute(stmt))
    DBUG_RETURN(1);
2676
  if (mysql->field_count)
2677
  {
2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705
    /* 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
        COM_EXECUTE (even if it is not necessary), so either this or
        previous always branch works.
        TODO: send metadata only when it's really necessary and add a warning
        'Metadata changed' when it's sent twice.
      */
      update_stmt_fields(stmt);
    }
2706 2707 2708 2709 2710 2711 2712 2713
  }
  stmt->state= MYSQL_STMT_EXECUTE_DONE;
  if (stmt->field_count)
  {
    stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
    stmt->unbuffered_fetch_cancelled= FALSE;
    stmt->read_row_func= stmt_read_row_unbuffered;
  }
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2714 2715 2716
  DBUG_RETURN(0);
}

2717

2718 2719 2720 2721
/*
  Return total parameters count in the statement
*/

2722
ulong STDCALL mysql_stmt_param_count(MYSQL_STMT * stmt)
2723
{
2724
  DBUG_ENTER("mysql_stmt_param_count");
2725 2726 2727
  DBUG_RETURN(stmt->param_count);
}

2728 2729 2730 2731 2732 2733
/*
  Return total affected rows from the last statement
*/

my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
2734
  return stmt->affected_rows;
2735
}
2736

2737

2738 2739 2740 2741 2742 2743 2744 2745 2746 2747
/*
  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;
}

2748
/*
2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761
  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.
2762 2763 2764 2765 2766 2767 2768
*/

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

2769

2770 2771 2772
static my_bool int_is_null_true= 1;		/* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;

2773

2774
/*
2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787
  Setup the input parameter data buffers from application

  SYNOPSIS
    mysql_stmt_bind_param()
    stmt    statement handle
            The statement must be prepared with mysql_stmt_prepare().
    bind    Array of mysql_stmt_param_count() bind parameters.

  RETURN
    0  success
    1  error, can be retrieved with mysql_stmt_error.
       Note, that this function doesn't check that size of MYSQL_BIND
       array is >= mysql_stmt_field_count(),
2788 2789
*/

2790
my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT *stmt, MYSQL_BIND *bind)
2791
{
2792 2793
  uint count=0;
  MYSQL_BIND *param, *end;
2794
  DBUG_ENTER("mysql_stmt_bind_param");
2795

2796 2797 2798 2799 2800 2801 2802 2803 2804 2805
  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);
  }

2806 2807 2808 2809 2810 2811 2812
  /* Allocated on prepare */
  memcpy((char*) stmt->params, (char*) bind,
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
2813
  {
2814
    param->param_number= count++;
2815 2816
    param->long_data_used= 0;

2817 2818 2819 2820
    /* 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;

2821 2822
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
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2823
    case MYSQL_TYPE_NULL:
2824
      param->is_null= &int_is_null_true;
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2825
      break;
2826
    case MYSQL_TYPE_TINY:
2827
      /* Force param->length as this is fixed for this type */
2828 2829
      param->length= &param->buffer_length;
      param->buffer_length= 1;
2830 2831 2832
      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
2833 2834
      param->length= &param->buffer_length;
      param->buffer_length= 2;
2835 2836 2837
      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
2838 2839
      param->length= &param->buffer_length;
      param->buffer_length= 4;
2840 2841 2842
      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
2843 2844
      param->length= &param->buffer_length;
      param->buffer_length= 8;
2845 2846 2847
      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
2848 2849
      param->length= &param->buffer_length;
      param->buffer_length= 4;
2850 2851 2852
      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
2853 2854
      param->length= &param->buffer_length;
      param->buffer_length= 8;
2855 2856
      param->store_param_func= store_param_double;
      break;
2857 2858
    case MYSQL_TYPE_TIME:
      param->store_param_func= store_param_time;
2859
      param->buffer_length= MAX_TIME_REP_LENGTH;
2860 2861 2862
      break;
    case MYSQL_TYPE_DATE:
      param->store_param_func= store_param_date;
2863
      param->buffer_length= MAX_DATE_REP_LENGTH;
2864 2865 2866 2867
      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->store_param_func= store_param_datetime;
2868
      param->buffer_length= MAX_DATETIME_REP_LENGTH;
2869
      break;
2870 2871 2872
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
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2873
    case MYSQL_TYPE_BLOB:
2874 2875 2876
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
      param->store_param_func= store_param_str;
2877
      /*
2878 2879
        For variable length types user must set either length or
        buffer_length.
2880
      */
2881 2882
      break;
    default:
2883
      strmov(stmt->sqlstate, unknown_sqlstate);
2884 2885
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
2886
	      param->buffer_type, count);
2887
      DBUG_RETURN(1);
2888
    }
2889 2890 2891 2892 2893 2894
    /*
      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;
2895
  }
2896
  /* We have to send/resend type information to MySQL */
2897 2898
  stmt->send_types_to_server= TRUE;
  stmt->bind_param_done= TRUE;
2899 2900 2901
  DBUG_RETURN(0);
}

2902

2903 2904 2905 2906 2907
/********************************************************************
 Long data implementation
*********************************************************************/

/*
2908 2909 2910
  Send long data in pieces to the server

  SYNOPSIS
2911
    mysql_stmt_send_long_data()
2912 2913 2914 2915
    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)
2916

2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940
  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.

2941
  RETURN VALUES
2942 2943
    0	ok
    1	error
2944 2945
*/

2946
my_bool STDCALL
2947
mysql_stmt_send_long_data(MYSQL_STMT *stmt, uint param_number,
2948
		     const char *data, ulong length)
2949 2950
{
  MYSQL_BIND *param;
2951
  DBUG_ENTER("mysql_stmt_send_long_data");
2952
  DBUG_ASSERT(stmt != 0);
2953
  DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
2954
		      param_number, data, length));
2955

2956 2957 2958 2959 2960 2961 2962 2963 2964
  /*
    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);
  }
2965

2966
  param= stmt->params+param_number;
2967 2968 2969 2970 2971 2972 2973
  if (param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
      param->buffer_type > MYSQL_TYPE_STRING)
  {
    /*
      Long data handling should be used only for string/binary
      types only
    */
2974
    strmov(stmt->sqlstate, unknown_sqlstate);
2975 2976 2977 2978
    sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	    param->param_number);
    DBUG_RETURN(1);
  }
2979

2980
  /*
2981 2982 2983
    Send long data packet if there is data or we're sending long data
    for the first time.
  */
2984
  if (length || param->long_data_used == 0)
2985
  {
2986
    MYSQL *mysql= stmt->mysql;
2987
    /* Packet header: stmt id (4 bytes), param no (2 bytes) */
2988 2989
    char buff[MYSQL_LONG_DATA_HEADER];

2990 2991
    int4store(buff, stmt->stmt_id);
    int2store(buff + 4, param_number);
2992 2993
    param->long_data_used= 1;

2994 2995 2996 2997
    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
2998 2999
    if ((*mysql->methods->advanced_command)(mysql, COM_LONG_DATA, buff,
					    sizeof(buff), data, length, 1))
3000
    {
3001 3002
      set_stmt_errmsg(stmt, mysql->net.last_error,
		      mysql->net.last_errno, mysql->net.sqlstate);
3003 3004 3005 3006 3007 3008
      DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}

3009

3010
/********************************************************************
3011
  Fetch-bind related implementations
3012 3013
*********************************************************************/

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3014 3015 3016
/****************************************************************************
  Functions to fetch data to application buffers

3017
  All functions have the following characteristics:
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3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028

  SYNOPSIS
    fetch_result_xxx()
    param   MySQL bind param
    row     Row value

  RETURN VALUES
    0	ok
    1	Error	(Can't alloc net->buffer)
****************************************************************************/

3029
static void set_zero_time(MYSQL_TIME *tm)
3030
{
3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041
  tm->year= tm->month= tm->day= 0;
  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  tm->neg= (bool)0;
}

/* Read TIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_time(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
3042

3043
  /* net_field_length will set pos to the first byte of data */
3044 3045 3046 3047 3048
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
    return 0;
  }
3049 3050 3051

  to= *pos;
  tm->neg= (bool) to[0];
3052 3053 3054 3055 3056

  tm->day=    (ulong) sint4korr(to+1);
  tm->hour=   (uint) to[5];
  tm->minute= (uint) to[6];
  tm->second= (uint) to[7];
3057
  tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
3058 3059 3060 3061 3062 3063 3064 3065 3066 3067

  tm->year= tm->month= 0;
  return length;
}

/* Read DATETIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
3068

3069 3070 3071 3072 3073
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
    return 0;
  }
3074 3075 3076 3077 3078 3079 3080 3081

  to= *pos;

  tm->neg=    0;
  tm->year=   (uint) sint2korr(to);
  tm->month=  (uint) to[2];
  tm->day=    (uint) to[3];

3082 3083 3084 3085 3086 3087 3088 3089
  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;
3090
  tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
3091 3092 3093 3094 3095 3096 3097 3098
  return length;
}

/* Read DATE from binary packet and return it to MYSQL_TIME */
static uint read_binary_date(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
3099

3100 3101 3102
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
3103
    return 0;
3104
  }
3105 3106

  to= *pos;
3107 3108 3109 3110 3111 3112 3113 3114
  tm->year =  (uint) sint2korr(to);
  tm->month=  (uint) to[2];
  tm->day= (uint) to[3];

  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  tm->neg= 0;
  return length;
3115 3116
}

3117
/* Convert Numeric to buffer types */
3118 3119
static void send_data_long(MYSQL_BIND *param, MYSQL_FIELD *field,
			   longlong value)
3120
{
3121
  char *buffer= param->buffer;
3122 3123
  uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);

3124
  switch (param->buffer_type) {
3125 3126
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3127 3128 3129 3130
  case MYSQL_TYPE_TINY:
    *param->buffer= (uchar) value;
    break;
  case MYSQL_TYPE_SHORT:
3131
    int2store(buffer, value);
3132 3133
    break;
  case MYSQL_TYPE_LONG:
3134
    int4store(buffer, value);
3135 3136
    break;
  case MYSQL_TYPE_LONGLONG:
3137
    int8store(buffer, value);
3138 3139
    break;
  case MYSQL_TYPE_FLOAT:
3140
  {
3141 3142
    float data= (field_is_unsigned ? (float) ulonglong2double(value) :
		 (float) value);
3143 3144 3145
    float4store(buffer, data);
    break;
  }
3146
  case MYSQL_TYPE_DOUBLE:
3147
  {
3148 3149
    double data= (field_is_unsigned ? ulonglong2double(value) :
		 (double) value);
3150 3151 3152
    float8store(buffer, data);
    break;
  }
3153
  default:
3154
  {
3155
    char tmp[22];				/* Enough for longlong */
3156
    uint length= (uint)(longlong10_to_str(value,(char *)tmp,
3157 3158
                                          field_is_unsigned ? 10: -10) -
                        tmp);
3159
    ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
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3160 3161 3162 3163
    if ((long) copy_length < 0)
      copy_length=0;
    else
      memcpy(buffer, (char *)tmp+param->offset, copy_length);
3164 3165
    *param->length= length;

3166 3167 3168
    if (copy_length != param->buffer_length)
      *(buffer+copy_length)= '\0';
  }
3169
  }
3170 3171
}

3172

3173
/* Convert Double to buffer types */
3174

3175
static void send_data_double(MYSQL_BIND *param, double value)
3176
{
3177 3178 3179
  char *buffer= param->buffer;

  switch(param->buffer_type) {
3180 3181
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3182 3183 3184 3185 3186 3187 3188
  case MYSQL_TYPE_TINY:
    *buffer= (uchar)value;
    break;
  case MYSQL_TYPE_SHORT:
    int2store(buffer, (short)value);
    break;
  case MYSQL_TYPE_LONG:
3189
    int4store(buffer, (long)value);
3190 3191 3192 3193 3194
    break;
  case MYSQL_TYPE_LONGLONG:
    int8store(buffer, (longlong)value);
    break;
  case MYSQL_TYPE_FLOAT:
3195 3196 3197 3198 3199
  {
    float data= (float)value;
    float4store(buffer, data);
    break;
  }
3200
  case MYSQL_TYPE_DOUBLE:
3201 3202 3203 3204 3205
  {
    double data= (double)value;
    float8store(buffer, data);
    break;
  }
3206
  default:
3207
  {
3208
    char tmp[128];
3209 3210
    uint length= my_sprintf(tmp,(tmp,"%g",value));
    ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
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3211 3212 3213 3214
    if ((long) copy_length < 0)
      copy_length=0;
    else
      memcpy(buffer, (char *)tmp+param->offset, copy_length);
3215 3216
    *param->length= length;

3217 3218 3219
    if (copy_length != param->buffer_length)
      *(buffer+copy_length)= '\0';
  }
3220
  }
3221 3222
}

3223

3224
/* Convert string to buffer types */
3225

3226
static void send_data_str(MYSQL_BIND *param, char *value, uint length)
3227
{
3228
  char *buffer= param->buffer;
3229
  int err=0;
3230 3231

  switch(param->buffer_type) {
3232 3233
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3234
  case MYSQL_TYPE_TINY:
3235
  {
3236
    uchar data= (uchar)my_strntol(&my_charset_latin1,value,length,10,NULL,
3237
				  &err);
3238
    *buffer= data;
3239
    break;
3240
  }
3241 3242
  case MYSQL_TYPE_SHORT:
  {
3243
    short data= (short)my_strntol(&my_charset_latin1,value,length,10,NULL,
3244
				  &err);
3245 3246 3247 3248 3249
    int2store(buffer, data);
    break;
  }
  case MYSQL_TYPE_LONG:
  {
3250
    int32 data= (int32)my_strntol(&my_charset_latin1,value,length,10,NULL,
3251
				  &err);
3252
    int4store(buffer, data);
3253 3254 3255 3256
    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
3257
    longlong data= my_strntoll(&my_charset_latin1,value,length,10,NULL,&err);
3258 3259 3260 3261 3262
    int8store(buffer, data);
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
3263
    float data = (float)my_strntod(&my_charset_latin1,value,length,NULL,&err);
3264 3265 3266 3267 3268
    float4store(buffer, data);
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
3269
    double data= my_strntod(&my_charset_latin1,value,length,NULL,&err);
3270 3271 3272
    float8store(buffer, data);
    break;
  }
3273 3274 3275 3276 3277 3278
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
    *param->length= length;
    length= min(length-param->offset, param->buffer_length);
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3279 3280
    if ((long) length > 0)
      memcpy(buffer, value+param->offset, length);
3281
    break;
3282
  default:
3283
    *param->length= length;
3284
    length= min(length-param->offset, param->buffer_length);
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3285 3286 3287 3288
    if ((long) length < 0)
      length= 0;
    else
      memcpy(buffer, value+param->offset, length);
3289
    if (length != param->buffer_length)
3290
      buffer[length]= '\0';
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3291
  }
3292 3293
}

3294

3295
static void send_data_time(MYSQL_BIND *param, MYSQL_TIME ltime,
3296 3297 3298
                           uint length)
{
  switch (param->buffer_type) {
3299 3300
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3301 3302 3303 3304 3305 3306 3307

  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_TIME:
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
3308

3309 3310 3311 3312 3313 3314 3315 3316 3317 3318
    tm->year= ltime.year;
    tm->month= ltime.month;
    tm->day= ltime.day;

    tm->hour= ltime.hour;
    tm->minute= ltime.minute;
    tm->second= ltime.second;

    tm->second_part= ltime.second_part;
    tm->neg= ltime.neg;
3319
    break;
3320 3321 3322 3323
  }
  default:
  {
    char buff[25];
3324

3325 3326 3327 3328 3329
    if (!length)
      ltime.time_type= MYSQL_TIMESTAMP_NONE;
    switch (ltime.time_type) {
    case MYSQL_TIMESTAMP_DATE:
      length= my_sprintf(buff,(buff, "%04d-%02d-%02d", ltime.year,
3330
                               ltime.month,ltime.day));
3331 3332 3333
      break;
    case MYSQL_TIMESTAMP_FULL:
      length= my_sprintf(buff,(buff, "%04d-%02d-%02d %02d:%02d:%02d",
3334 3335
                               ltime.year,ltime.month,ltime.day,
                               ltime.hour,ltime.minute,ltime.second));
3336 3337 3338
      break;
    case MYSQL_TIMESTAMP_TIME:
      length= my_sprintf(buff, (buff, "%02d:%02d:%02d",
3339
                                ltime.hour,ltime.minute,ltime.second));
3340 3341 3342 3343 3344
      break;
    default:
      length= 0;
      buff[0]='\0';
    }
3345
    send_data_str(param, (char *)buff, length);
3346 3347 3348
  }
  }
}
3349

3350

3351
/* Fetch data to buffers */
3352

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3353
static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
3354 3355
{
  ulong length;
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3356 3357
  enum enum_field_types field_type= field->type;

3358 3359 3360
  switch (field_type) {
  case MYSQL_TYPE_TINY:
  {
3361
    char value= (char) **row;
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3362
    uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
3363 3364
    longlong data= ((field_is_unsigned) ? (longlong) (unsigned char) value:
		    (longlong) value);
3365
    send_data_long(param, field, data);
3366
    length= 1;
3367 3368 3369 3370 3371
    break;
  }
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
  {
3372
    short value= sint2korr(*row);
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3373
    uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
3374 3375
    longlong data= ((field_is_unsigned) ? (longlong) (unsigned short) value:
		    (longlong) value);
3376
    send_data_long(param, field, data);
3377
    length= 2;
3378 3379 3380 3381
    break;
  }
  case MYSQL_TYPE_LONG:
  {
3382
    long value= sint4korr(*row);
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3383
    uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
3384 3385
    longlong data= ((field_is_unsigned) ? (longlong) (unsigned long) value:
		    (longlong) value);
3386
    send_data_long(param, field, data);
3387
    length= 4;
3388 3389 3390 3391 3392
    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
    longlong value= (longlong)sint8korr(*row);
3393
    send_data_long(param, field, value);
3394
    length= 8;
3395 3396 3397 3398 3399 3400
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
    float value;
    float4get(value,*row);
3401
    send_data_double(param,value);
3402
    length= 4;
3403 3404 3405 3406 3407 3408
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
    double value;
    float8get(value,*row);
3409
    send_data_double(param,value);
3410
    length= 8;
3411 3412 3413 3414
    break;
  }
  case MYSQL_TYPE_DATE:
  {
3415
    MYSQL_TIME tm;
3416

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
3417
    length= read_binary_date(&tm, row);
3418 3419
    tm.time_type= MYSQL_TIMESTAMP_DATE;
    send_data_time(param, tm, length);
3420 3421 3422 3423
    break;
  }
  case MYSQL_TYPE_TIME:
  {
3424
    MYSQL_TIME tm;
3425

3426 3427 3428 3429 3430 3431 3432 3433 3434
    length= read_binary_time(&tm, row);
    tm.time_type= MYSQL_TIMESTAMP_TIME;
    send_data_time(param, tm, length);
    break;
  }
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME tm;
3435

3436 3437 3438
    length= read_binary_datetime(&tm, row);
    tm.time_type= MYSQL_TIMESTAMP_FULL;
    send_data_time(param, tm, length);
3439 3440
    break;
  }
3441 3442
  default:
    length= net_field_length(row);
3443
    send_data_str(param,(char*) *row,length);
3444 3445 3446 3447 3448
    break;
  }
  *row+= length;
}

3449

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3450 3451
static void fetch_result_tinyint(MYSQL_BIND *param, uchar **row)
{
3452
  *param->buffer= **row;
3453
  (*row)++;
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3454 3455 3456 3457
}

static void fetch_result_short(MYSQL_BIND *param, uchar **row)
{
3458
  short value = (short)sint2korr(*row);
3459
  shortstore(param->buffer, value);
3460
  *row+= 2;
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3461 3462 3463 3464
}

static void fetch_result_int32(MYSQL_BIND *param, uchar **row)
{
3465
  int32 value= (int32)sint4korr(*row);
3466
  longstore(param->buffer, value);
3467
  *row+= 4;
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3468 3469 3470
}

static void fetch_result_int64(MYSQL_BIND *param, uchar **row)
3471
{
3472
  longlong value= (longlong)sint8korr(*row);
3473
  longlongstore(param->buffer, value);
3474
  *row+= 8;
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3475 3476 3477 3478 3479 3480
}

static void fetch_result_float(MYSQL_BIND *param, uchar **row)
{
  float value;
  float4get(value,*row);
3481
  floatstore(param->buffer, value);
3482
  *row+= 4;
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3483 3484 3485 3486 3487 3488
}

static void fetch_result_double(MYSQL_BIND *param, uchar **row)
{
  double value;
  float8get(value,*row);
3489
  doublestore(param->buffer, value);
3490
  *row+= 8;
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3491 3492
}

3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
static void fetch_result_time(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_time(tm, row);
}

static void fetch_result_date(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_date(tm, row);
}

static void fetch_result_datetime(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_datetime(tm, row);
}

3511
static void fetch_result_bin(MYSQL_BIND *param, uchar **row)
3512
{
3513 3514 3515
  ulong length= net_field_length(row);
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
3516
  *param->length= length;
3517 3518
  *row+= length;
}
3519

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3520 3521 3522
static void fetch_result_str(MYSQL_BIND *param, uchar **row)
{
  ulong length= net_field_length(row);
3523 3524
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
3525 3526 3527
  /* Add an end null if there is room in the buffer */
  if (copy_length != param->buffer_length)
    *(param->buffer+copy_length)= '\0';
3528
  *param->length= length;			/* return total length */
3529
  *row+= length;
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3530 3531
}

3532

3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569
/*
  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;
}



3570
/*
3571
  Setup the bind buffers for resultset processing
3572 3573
*/

3574
my_bool STDCALL mysql_stmt_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
3575
{
3576
  MYSQL_BIND *param, *end;
3577
  MYSQL_FIELD *field;
3578
  ulong       bind_count;
3579
  uint        param_count= 0;
3580
  DBUG_ENTER("mysql_stmt_bind_result");
3581 3582
  DBUG_ASSERT(stmt != 0);

3583 3584 3585 3586 3587 3588
  if (!stmt->field_count)
  {
    if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
    {
      set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
    }
3589
    DBUG_RETURN(0);
3590 3591 3592 3593 3594 3595 3596
  }
  bind_count= stmt->field_count;

  /*
    We only need to check that stmt->field_count - if it is not null
    stmt->bind was initialized in mysql_stmt_prepare
   */
3597

3598
  memcpy((char*) stmt->bind, (char*) bind, sizeof(MYSQL_BIND) * bind_count);
3599

3600 3601 3602
  for (param= stmt->bind, end= param + bind_count, field= stmt->fields ;
       param < end ;
       param++, field++)
3603
  {
3604 3605
    /*
      Set param->is_null to point to a dummy variable if it's not set.
3606
      This is to make the execute code easier
3607 3608
    */
    if (!param->is_null)
monty@mashka.mysql.fi's avatar
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3609
      param->is_null= &param->internal_is_null;
3610

3611
    if (!param->length)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3612
      param->length= &param->internal_length;
3613

3614
    param->param_number= param_count++;
3615 3616
    param->offset= 0;

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venu@myvenu.com committed
3617 3618
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
3619
    case MYSQL_TYPE_NULL: /* for dummy binds */
3620
      *param->length= 0;
3621
      break;
venu@myvenu.com's avatar
venu@myvenu.com committed
3622 3623
    case MYSQL_TYPE_TINY:
      param->fetch_result= fetch_result_tinyint;
3624
      *param->length= 1;
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venu@myvenu.com committed
3625 3626
      break;
    case MYSQL_TYPE_SHORT:
3627
    case MYSQL_TYPE_YEAR:
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venu@myvenu.com committed
3628
      param->fetch_result= fetch_result_short;
3629
      *param->length= 2;
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venu@myvenu.com committed
3630
      break;
3631
    case MYSQL_TYPE_INT24:
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venu@myvenu.com committed
3632 3633
    case MYSQL_TYPE_LONG:
      param->fetch_result= fetch_result_int32;
3634
      *param->length= 4;
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venu@myvenu.com committed
3635 3636 3637
      break;
    case MYSQL_TYPE_LONGLONG:
      param->fetch_result= fetch_result_int64;
3638
      *param->length= 8;
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venu@myvenu.com committed
3639 3640 3641
      break;
    case MYSQL_TYPE_FLOAT:
      param->fetch_result= fetch_result_float;
3642
      *param->length= 4;
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venu@myvenu.com committed
3643 3644 3645
      break;
    case MYSQL_TYPE_DOUBLE:
      param->fetch_result= fetch_result_double;
3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659
      *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);
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3660 3661 3662 3663
      break;
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
3664
    case MYSQL_TYPE_BLOB:
3665 3666 3667
      DBUG_ASSERT(param->buffer_length != 0);
      param->fetch_result= fetch_result_bin;
      break;
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3668 3669
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
3670
      DBUG_ASSERT(param->buffer_length != 0);
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venu@myvenu.com committed
3671 3672 3673
      param->fetch_result= fetch_result_str;
      break;
    default:
3674
      strmov(stmt->sqlstate, unknown_sqlstate);
3675 3676
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
3677
	      param->buffer_type, param_count);
venu@myvenu.com's avatar
venu@myvenu.com committed
3678
      DBUG_RETURN(1);
peter@mysql.com's avatar
peter@mysql.com committed
3679
    }
3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731

    /* 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;
      break;
    case MYSQL_TYPE_TINY:
      param->pack_length= 1;
      break;
    case MYSQL_TYPE_YEAR:
    case MYSQL_TYPE_SHORT:
      param->pack_length= 2;
      break;
    case MYSQL_TYPE_INT24:
    case MYSQL_TYPE_LONG:
      param->pack_length= 4;
      break;
    case MYSQL_TYPE_LONGLONG:
      param->pack_length= 8;
      break;
    case MYSQL_TYPE_FLOAT:
      param->pack_length= 4;
      break;
    case MYSQL_TYPE_DOUBLE:
      param->pack_length= 8;
      break;
    case MYSQL_TYPE_TIME:
    case MYSQL_TYPE_DATE:
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->skip_result= skip_result_with_length;
      break;
    case MYSQL_TYPE_DECIMAL:
    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:
      param->skip_result= skip_result_string;
      break;
    default:
      strmov(stmt->sqlstate, unknown_sqlstate);
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
	      field->type, param_count);
      DBUG_RETURN(1);
    }
3732
  }
3733
  stmt->bind_result_done= TRUE;
3734 3735 3736
  DBUG_RETURN(0);
}

3737

3738
/*
3739
  Fetch row data to bind buffers
3740 3741
*/

3742
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
3743
{
3744
  MYSQL_BIND  *bind, *end;
3745
  MYSQL_FIELD *field;
3746
  uchar *null_ptr, bit;
3747 3748 3749 3750 3751 3752
  /*
    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);
3753

3754 3755 3756
  if (!stmt->bind_result_done)
  {
    /* If output parameters were not bound we should just return success */
3757
    return 0;
3758
  }
3759 3760

  null_ptr= row;
3761 3762
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */
3763

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3764
  /* Copy complete row to application buffers */
3765 3766
  for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields ;
       bind < end ;
3767
       bind++, field++)
3768
  {
3769
    if (*null_ptr & bit)
3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780
    {
      /*
        We should set both inter_buffer and is_null to be able to see
        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.
      */
      bind->inter_buffer= NULL;
      *bind->is_null= 1;
    }
3781
    else
3782
    {
3783
      *bind->is_null= 0;
3784
      bind->inter_buffer= row;
3785 3786
      if (field->type == bind->buffer_type)
        (*bind->fetch_result)(bind, &row);
3787
      else
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3788
        fetch_results(bind, field, &row);
3789
    }
3790
    if (!((bit<<=1) & 255))
3791
    {
3792
      bit= 1;					/* To next byte */
3793
      null_ptr++;
3794 3795 3796 3797 3798
    }
  }
  return 0;
}

3799

3800
int cli_unbuffered_fetch(MYSQL *mysql, char **row)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
3801 3802 3803 3804
{
  if (packet_error == net_safe_read(mysql))
    return 1;

3805 3806
  *row= ((mysql->net.read_pos[0] == 254) ? NULL :
	 (char*) (mysql->net.read_pos+1));
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
3807 3808
  return 0;
}
3809

3810

3811
/*
3812
  Fetch and return row data to bound buffers, if any
3813 3814
*/

3815
int STDCALL mysql_stmt_fetch(MYSQL_STMT *stmt)
3816
{
3817
  int rc;
3818
  uchar *row;
3819
  DBUG_ENTER("mysql_stmt_fetch");
3820

3821 3822
  if ((rc= (*stmt->read_row_func)(stmt, &row)) ||
      (rc= stmt_fetch_row(stmt, row)))
3823
  {
3824 3825
    stmt->state= MYSQL_STMT_PREPARE_DONE;       /* XXX: this is buggy */
    stmt->read_row_func= stmt_read_row_no_data;
3826
  }
3827
  else
3828
  {
3829 3830
    /* 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
3831
  }
3832
  DBUG_RETURN(rc);
3833 3834
}

3835

3836
/*
3837
  Fetch data for one specified column data
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3838 3839

  SYNOPSIS
3840
    mysql_stmt_fetch_column()
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3841
    stmt		Prepared statement handler
3842
    bind		Where data should be placed. Should be filled in as
3843
			when calling mysql_stmt_bind_result()
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monty@mashka.mysql.fi committed
3844 3845 3846
    column		Column to fetch (first column is 0)
    ulong offset	Offset in result data (to fetch blob in pieces)
			This is normally 0
3847
  RETURN
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monty@mashka.mysql.fi committed
3848 3849
    0	ok
    1	error
3850 3851
*/

3852
int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind,
3853
                                    uint column, ulong offset)
3854
{
3855
  MYSQL_BIND *param= stmt->bind+column;
3856
  DBUG_ENTER("mysql_stmt_fetch_column");
3857

3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868
  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);
  }

3869
  if (param->inter_buffer)
3870
  {
3871
    MYSQL_FIELD *field= stmt->fields+column;
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monty@mashka.mysql.fi committed
3872
    uchar *row= param->inter_buffer;
3873 3874 3875 3876
    bind->offset= offset;
    if (bind->is_null)
      *bind->is_null= 0;
    if (bind->length) /* Set the length if non char/binary types */
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3877
      *bind->length= *param->length;
3878
    else
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3879 3880
      bind->length= &param->internal_length;	/* Needed for fetch_result() */
    fetch_results(bind, field, &row);
3881
  }
3882 3883 3884 3885 3886
  else
  {
    if (bind->is_null)
      *bind->is_null= 1;
  }
3887 3888 3889 3890
  DBUG_RETURN(0);
}


3891
/*
3892 3893 3894
  Read all rows of data from server  (binary format)
*/

3895
int cli_read_binary_rows(MYSQL_STMT *stmt)
3896 3897 3898 3899
{
  ulong      pkt_len;
  uchar      *cp;
  MYSQL      *mysql= stmt->mysql;
3900 3901
  MYSQL_DATA *result= &stmt->result;
  MYSQL_ROWS *cur, **prev_ptr= &result->data;
3902
  NET        *net = &mysql->net;
3903
  DBUG_ENTER("cli_read_binary_rows");
3904

3905
  mysql= mysql->last_used_con;
3906

3907
  while ((pkt_len= net_safe_read(mysql)) != packet_error)
3908
  {
3909 3910
    cp= net->read_pos;
    if (cp[0] != 254 || pkt_len >= 8)
3911
    {
3912 3913 3914 3915
      if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
                                          sizeof(MYSQL_ROWS) + pkt_len - 1)))
      {
        set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
3916
        goto err;
3917 3918 3919 3920 3921
      }
      cur->data= (MYSQL_ROW) (cur+1);
      *prev_ptr= cur;
      prev_ptr= &cur->next;
      memcpy((char *) cur->data, (char *) cp+1, pkt_len-1);
3922 3923
      cur->length= pkt_len;		/* To allow us to do sanity checks */
      result->rows++;
3924
    }
3925
    else
3926
    {
3927 3928 3929 3930
      /* end of data */
      *prev_ptr= 0;
      mysql->warning_count= uint2korr(cp+1);
      mysql->server_status= uint2korr(cp+3);
3931 3932 3933
      DBUG_RETURN(0);
    }
  }
3934
  set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
3935 3936

err:
3937
  DBUG_RETURN(1);
3938 3939
}

3940

3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983
/*
  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)
{
  MYSQL_BIND  *bind, *end;
  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 */

  /* Go throw all fields and calculate metadata */
  for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields ;
       bind < end ;
       bind++, field++)
  {
    if (!(*null_ptr & bit))
      (*bind->skip_result)(bind, field, &row);
    DBUG_ASSERT(row <= row_end);
    if (!((bit<<=1) & 255))
    {
      bit= 1;					/* To next byte */
      null_ptr++;
    }
  }
}


3984 3985 3986 3987 3988 3989 3990
/*
  Store or buffer the binary results to stmt
*/

int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
  MYSQL *mysql= stmt->mysql;
3991
  MYSQL_DATA *result= &stmt->result;
3992
  DBUG_ENTER("mysql_stmt_store_result");
3993 3994 3995 3996 3997

  mysql= mysql->last_used_con;

  if (!stmt->field_count)
    DBUG_RETURN(0);
3998 3999
  if ((int) stmt->state < (int) MYSQL_STMT_EXECUTE_DONE ||
      mysql->status != MYSQL_STATUS_GET_RESULT)
4000
  {
4001
    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
4002
    DBUG_RETURN(1);
4003
  }
4004
  if (result->data)
4005
  {
4006 4007 4008 4009
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
    stmt->data_cursor= NULL;
4010
  }
4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033

  if (stmt->update_max_length && !stmt->bind_result_done)
  {
    /*
      We must initalize the bind structure to be able to calculate
      max_length
    */
    MYSQL_BIND  *bind, *end;
    MYSQL_FIELD *field;
    bzero((char*) stmt->bind, sizeof(*stmt->bind)* stmt->field_count);

    for (bind= stmt->bind, end= bind + stmt->field_count, field= stmt->fields;
	 bind < end ;
	 bind++, field++)
    {
      bind->buffer_type= field->type;
      bind->buffer_length=1;
    }

    mysql_stmt_bind_result(stmt, stmt->bind);
    stmt->bind_result_done= 0;			/* No normal bind done */
  }

4034
  if ((*mysql->methods->read_binary_rows)(stmt))
4035
  {
4036 4037 4038
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
4039
    mysql->status= MYSQL_STATUS_READY;
4040
    DBUG_RETURN(1);
4041
  }
4042

4043 4044 4045 4046 4047 4048 4049
  if (stmt->update_max_length)
  {
    MYSQL_ROWS *cur= result->data;
    for(; cur; cur=cur->next)
      stmt_update_metadata(stmt, cur);
  }

4050 4051
  stmt->data_cursor= result->data;
  mysql->affected_rows= stmt->affected_rows= result->rows;
4052 4053 4054
  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 */
4055
  DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_stmt_fetch() */
4056 4057
}

4058

4059 4060 4061 4062 4063 4064 4065
/*
  Seek to desired row in the statement result set
*/

MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
4066
  MYSQL_ROW_OFFSET offset= stmt->data_cursor;
4067
  DBUG_ENTER("mysql_stmt_row_seek");
4068

4069 4070
  stmt->data_cursor= row;
  DBUG_RETURN(offset);
4071 4072
}

4073

4074 4075 4076 4077
/*
  Return the current statement row cursor position
*/

4078
MYSQL_ROW_OFFSET STDCALL
4079 4080 4081
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_row_tell");
4082

4083
  DBUG_RETURN(stmt->data_cursor);
4084 4085
}

4086

4087 4088 4089 4090 4091 4092 4093
/*
  Move the stmt result set data cursor to specified row
*/

void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
4094
  MYSQL_ROWS *tmp= stmt->result.data;
4095 4096
  DBUG_ENTER("mysql_stmt_data_seek");
  DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
4097

4098 4099 4100
  for (; tmp && row; --row, tmp= tmp->next)
    ;
  stmt->data_cursor= tmp;
4101
  DBUG_VOID_RETURN;
4102 4103
}

4104

4105 4106 4107 4108 4109 4110 4111
/*
  Return total rows the current statement result set
*/

my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_num_rows");
4112

4113
  DBUG_RETURN(stmt->result.rows);
4114
}
4115

4116 4117
my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
{
4118
  MYSQL_DATA *result= &stmt->result;
4119 4120 4121
  DBUG_ENTER("mysql_stmt_free_result");

  DBUG_ASSERT(stmt != 0);
4122

4123 4124 4125 4126
  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    MYSQL *mysql= stmt->mysql;

4127
    if (result->data)
4128 4129
    {
      /* Result buffered */
4130 4131 4132 4133
      free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
      result->data= NULL;
      result->rows= 0;
      stmt->data_cursor= NULL;
4134
    }
4135 4136 4137

    if (mysql && stmt->field_count &&
        (int) stmt->state > (int) MYSQL_STMT_PREPARE_DONE)
4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153
    {
      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
        /* There is a result set and it belongs to this statement */
        flush_use_result(mysql);
        mysql->status= MYSQL_STATUS_READY;
      }
    }
    stmt->state= MYSQL_STMT_PREPARE_DONE;
    stmt->read_row_func= stmt_read_row_no_data;
  }
  DBUG_RETURN(0);
}

4154
/********************************************************************
4155
 statement error handling and close
4156
*********************************************************************/
4157

4158
/*
4159
  Close the statement handle by freeing all alloced resources
4160

4161
  SYNOPSIS
4162
    mysql_stmt_close()
4163
    stmt	       Statement handle
4164

4165 4166 4167 4168
  RETURN VALUES
    0	ok
    1	error
*/
4169

4170
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
4171
{
4172 4173 4174
  MYSQL *mysql= stmt->mysql;
  int rc= 0;
  DBUG_ENTER("mysql_stmt_close");
4175

4176
  free_root(&stmt->result.alloc, MYF(0));
4177 4178 4179
  free_root(&stmt->mem_root, MYF(0));

  if (mysql)
4180
  {
4181 4182
    mysql->stmts= list_delete(mysql->stmts, &stmt->list);
    if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
4183
    {
4184
      char buff[MYSQL_STMT_HEADER];             /* 4 bytes - stmt id */
4185 4186 4187 4188 4189

      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
4190
        /*
4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204
          Flush result set of the connection. If it does not belong
          to this statement, set a warning.
        */
        flush_use_result(mysql);
        if (mysql->unbuffered_fetch_owner)
          *mysql->unbuffered_fetch_owner= TRUE;
        mysql->status= MYSQL_STATUS_READY;
      }
      int4store(buff, stmt->stmt_id);
      if ((rc= simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1)))
      {
        set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                        mysql->net.sqlstate);
      }
4205
    }
4206
  }
4207

4208
  my_free((gptr) stmt, MYF(MY_WME));
4209

4210
  DBUG_RETURN(test(rc));
4211 4212
}

4213 4214 4215 4216 4217 4218
/*
  Reset the statement buffers in server
*/

my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
4219
  char buff[MYSQL_STMT_HEADER]; /* packet header: 4 bytes for stmt id */
4220
  MYSQL *mysql;
4221
  MYSQL_BIND *param, *param_end;
4222 4223
  DBUG_ENTER("mysql_stmt_reset");
  DBUG_ASSERT(stmt != 0);
4224 4225 4226 4227

  /* If statement hasnt been prepared there is nothing to reset */
  if ((int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE)
    DBUG_RETURN(0);
4228

4229 4230
  mysql= stmt->mysql->last_used_con;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
4231
  if ((*mysql->methods->advanced_command)(mysql, COM_RESET_STMT, buff,
4232
                                          sizeof(buff), 0, 0, 0))
4233
  {
4234
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
4235 4236 4237
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
  }
4238 4239 4240 4241 4242 4243 4244

  /* Clear long_data_used for next call (as we do in mysql_stmt_execute() */
  for (param= stmt->params, param_end= param + stmt->param_count;
       param < param_end;
       param++)
    param->long_data_used= 0;

4245 4246 4247
  DBUG_RETURN(0);
}

4248 4249 4250 4251 4252 4253 4254
/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
4255
  DBUG_RETURN(stmt->last_errno);
4256 4257
}

4258 4259 4260 4261 4262 4263
const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_sqlstate");
  DBUG_RETURN(stmt->sqlstate);
}

4264 4265 4266 4267 4268 4269 4270
/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
4271
  DBUG_RETURN(stmt->last_error);
4272 4273
}

4274

4275 4276 4277 4278
/********************************************************************
 Transactional APIs
*********************************************************************/

4279 4280 4281 4282
/*
  Commit the current transaction
*/

4283
my_bool STDCALL mysql_commit(MYSQL * mysql)
4284 4285
{
  DBUG_ENTER("mysql_commit");
4286
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
4287 4288 4289
}

/*
4290
  Rollback the current transaction
4291 4292
*/

4293
my_bool STDCALL mysql_rollback(MYSQL * mysql)
4294 4295
{
  DBUG_ENTER("mysql_rollback");
4296
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
4297 4298 4299 4300 4301 4302 4303
}


/*
  Set autocommit to either true or false
*/

4304
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
4305 4306 4307 4308 4309
{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

  if (auto_mode) /* set to true */
4310 4311
    DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
4312
}
4313 4314 4315


/********************************************************************
4316
 Multi query execution + SPs APIs
4317 4318 4319
*********************************************************************/

/*
4320 4321
  Returns true/false to indicate whether any more query results exist
  to be read using mysql_next_result()
4322 4323 4324 4325
*/

my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
4326
  my_bool res;
4327
  DBUG_ENTER("mysql_more_results");
4328 4329

  res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
4330
	1: 0);
4331
  DBUG_PRINT("exit",("More results exists ? %d", res));
4332
  DBUG_RETURN(res);
4333 4334
}

4335

4336 4337 4338
/*
  Reads and returns the next query results
*/
4339
int STDCALL mysql_next_result(MYSQL *mysql)
4340
{
4341
  DBUG_ENTER("mysql_next_result");
4342

4343 4344 4345 4346 4347 4348 4349 4350
  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);
  }

4351 4352
  mysql->net.last_error[0]= 0;
  mysql->net.last_errno= 0;
4353
  strmov(mysql->net.sqlstate, not_error_sqlstate);
4354 4355 4356
  mysql->affected_rows= ~(my_ulonglong) 0;

  if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
4357 4358
    DBUG_RETURN((*mysql->methods->next_result)(mysql));

4359
  DBUG_RETURN(-1);				/* No more results */
4360
}
hf@deer.(none)'s avatar
hf@deer.(none) committed
4361

4362

hf@deer.(none)'s avatar
hf@deer.(none) committed
4363 4364 4365 4366 4367 4368 4369 4370 4371 4372
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);
}