libmysql.c 143 KB
Newer Older
1
/* Copyright (C) 2000-2004 MySQL AB
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2 3 4

   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
5 6 7 8
   the Free Software Foundation.

   There are special exceptions to the terms and conditions of the GPL as it
   is applied to this software. View the full text of the exception in file
9
   EXCEPTIONS-CLIENT in the directory of this software distribution.
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
10 11

   This program is distributed in the hope that it will be useful,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
12
   but WITHOUT ANY WARRANTY; without even the implied warranty of
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
13 14 15 16 17 18
   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 */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
19

20
#include <my_global.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
21
#include <my_sys.h>
22
#include <my_time.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
#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
43
#include <select.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
44 45 46 47
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
48
#endif /* !defined(MSDOS) && !defined(__WIN__) */
49 50
#ifdef HAVE_POLL
#include <sys/poll.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
51 52
#endif
#ifdef HAVE_SYS_UN_H
53
#include <sys/un.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
54 55 56 57 58 59 60 61
#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h>				/* because of signal()	*/
#endif
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

hf@deer.(none)'s avatar
hf@deer.(none) committed
62
#include <sql_common.h>
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
63
#include "client_settings.h"
hf@deer.(none)'s avatar
hf@deer.(none) committed
64

65 66
#undef net_buffer_length
#undef max_allowed_packet
67

68
ulong 		net_buffer_length=8192;
69
ulong		max_allowed_packet= 1024L*1024L*1024L;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
70

hf@deer.(none)'s avatar
hf@deer.(none) committed
71

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
72 73 74 75 76
#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool	net_flush(NET *net);
#endif

bk@work.mysql.com's avatar
bk@work.mysql.com committed
77
#if defined(MSDOS) || defined(__WIN__)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
78
/* socket_errno is defined in my_global.h for all platforms */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
79 80 81 82
#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
83
#endif /* __WIN__ */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
84

85 86 87 88 89
/*
  If allowed through some configuration, then this needs to
  be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
90 91
#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)

bk@work.mysql.com's avatar
bk@work.mysql.com committed
92
static void append_wild(char *to,char *end,const char *wild);
93
sig_handler my_pipe_sig_handler(int sig);
94 95 96 97

static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;

monty@mysql.com's avatar
monty@mysql.com committed
98 99

/*
monty@mysql.com's avatar
merge  
monty@mysql.com committed
100
  Initialize the MySQL client library
monty@mysql.com's avatar
monty@mysql.com committed
101 102

  SYNOPSIS
monty@mysql.com's avatar
merge  
monty@mysql.com committed
103
    mysql_server_init()
monty@mysql.com's avatar
monty@mysql.com committed
104 105

  NOTES
monty@mysql.com's avatar
merge  
monty@mysql.com committed
106 107 108 109 110
    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.
monty@mysql.com's avatar
monty@mysql.com committed
111 112 113 114 115 116

  RETURN
    0  ok
    1  could not initialize environment (out of memory or thread keys)
*/

monty@mysql.com's avatar
monty@mysql.com committed
117 118 119
int STDCALL mysql_server_init(int argc __attribute__((unused)),
			      char **argv __attribute__((unused)),
			      char **groups __attribute__((unused)))
120
{
121
  int result= 0;
122 123 124 125
  if (!mysql_client_init)
  {
    mysql_client_init=1;
    org_my_init_done=my_init_done;
monty@mysql.com's avatar
monty@mysql.com committed
126 127
    if (my_init())				/* Will init threads */
      return 1;
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
    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);
155
#if defined(SIGPIPE) && !defined(__WIN__) && !defined(__NETWARE__)
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
156
    (void) signal(SIGPIPE, SIG_IGN);
157
#endif
monty@mysql.com's avatar
monty@mysql.com committed
158
#ifdef EMBEDDED_LIBRARY
159
    if (argc > -1)
160
       result= init_embedded_server(argc, argv, groups);
monty@mysql.com's avatar
monty@mysql.com committed
161
#endif
162 163 164
  }
#ifdef THREAD
  else
hf@deer.(none)'s avatar
hf@deer.(none) committed
165
    result= (int)my_thread_init();         /* Init if new thread */
166
#endif
167
  return result;
168
}
tim@black.box's avatar
tim@black.box committed
169

170

171
void STDCALL mysql_server_end()
172
{
monty@mysql.com's avatar
monty@mysql.com committed
173
#ifdef EMBEDDED_LIBRARY
174
  end_embedded_server();
monty@mysql.com's avatar
monty@mysql.com committed
175
#endif
176 177 178
  finish_client_errs();
  vio_end();

179 180
  /* If library called my_init(), free memory allocated by it */
  if (!org_my_init_done)
181
  {
182
    my_end(MY_DONT_FREE_DBUG);
183 184 185 186 187
#ifndef THREAD
  /* Remove TRACING, if enabled by mysql_debug() */
    DBUG_POP();
#endif
  }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
188
  else
189 190
  {
    free_charsets();
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
191
    mysql_thread_end();
192 193
  }

194
  mysql_client_init= org_my_init_done= 0;
195 196 197 198 199 200 201
#ifdef EMBEDDED_SERVER
  if (stderror_file)
  {
    fclose(stderror_file);
    stderror_file= 0;
  }
#endif
202
}
tim@black.box's avatar
tim@black.box committed
203

204 205 206
static MYSQL_PARAMETERS mysql_internal_parameters=
{&max_allowed_packet, &net_buffer_length};

207
MYSQL_PARAMETERS *STDCALL mysql_get_parameters(void)
208 209 210 211
{
  return &mysql_internal_parameters;
}

212
my_bool STDCALL mysql_thread_init()
tim@black.box's avatar
tim@black.box committed
213 214
{
#ifdef THREAD
215
  return my_thread_init();
tim@black.box's avatar
tim@black.box committed
216
#else
217
  return 0;
tim@black.box's avatar
tim@black.box committed
218 219 220
#endif
}

221
void STDCALL mysql_thread_end()
tim@black.box's avatar
tim@black.box committed
222 223
{
#ifdef THREAD
224
  my_thread_end();
tim@black.box's avatar
tim@black.box committed
225 226 227
#endif
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
228 229 230 231
/*
  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.
*/
232 233 234 235 236
static MYSQL* spawn_init(MYSQL* parent, const char* host,
			 unsigned int port,
			 const char* user,
			 const char* passwd);

237

bk@work.mysql.com's avatar
bk@work.mysql.com committed
238 239

/*
240
  Expand wildcard to a sql string
bk@work.mysql.com's avatar
bk@work.mysql.com committed
241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264
*/

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;
  }
}


/**************************************************************************
265
  Init debugging if MYSQL_DEBUG environment variable is found
bk@work.mysql.com's avatar
bk@work.mysql.com committed
266 267 268
**************************************************************************/

void STDCALL
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
269
mysql_debug(const char *debug __attribute__((unused)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
{
#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];
292 293
      buff[sizeof(buff)-1]= 0;
      strxnmov(buff,sizeof(buff)-1,"libmysql: ", env, NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
294 295 296 297 298 299 300 301 302
      MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
    }
#endif
  }
#endif
}


/**************************************************************************
303
  Close the server connection if we get a SIGPIPE
bk@work.mysql.com's avatar
bk@work.mysql.com committed
304 305 306
   ARGSUSED
**************************************************************************/

hf@deer.(none)'s avatar
hf@deer.(none) committed
307
sig_handler
308
my_pipe_sig_handler(int sig __attribute__((unused)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
309 310 311
{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
312
  (void) signal(SIGPIPE, my_pipe_sig_handler);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
313 314 315
#endif
}

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
316 317
/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
318
				   unsigned long length)
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
319 320 321 322
{
  DBUG_ENTER("mysql_master_query");
  if (mysql_master_send_query(mysql, q, length))
    DBUG_RETURN(1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
323
  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
324
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
325

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
326 327
my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
					unsigned long length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
328
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
329 330 331 332
  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);
333
  master->reconnect= 1;
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
334 335
  mysql->last_used_con = master;
  DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
336 337 338
}


hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
339 340 341
/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
				  unsigned long length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
342
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
343 344 345
  DBUG_ENTER("mysql_slave_query");
  if (mysql_slave_send_query(mysql, q, length))
    DBUG_RETURN(1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
346
  DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
347 348 349
}


hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
350 351
my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
				   unsigned long length)
352
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
353 354
  MYSQL* last_used_slave, *slave_to_use = 0;
  DBUG_ENTER("mysql_slave_send_query");
355

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
356 357 358 359 360 361 362 363 364 365
  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,
366
						    0,0,0,0))
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
367
    DBUG_RETURN(1);
368
  slave_to_use->reconnect= 1;
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
369 370
  DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
}
371 372


hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
373 374 375
/* enable/disable parsing of all queries to decide
   if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
376
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
377
  mysql->options.rpl_parse = 1;
378 379
}

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
380
void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
381
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
382
  mysql->options.rpl_parse = 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
383 384
}

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
385 386
/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
387
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
388
  return mysql->options.rpl_parse;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
389 390
}

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
391 392
/*  enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
393
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
394 395
  mysql->options.no_master_reads = 0;
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
396

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
397
void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
398 399 400 401
{
  mysql->options.no_master_reads = 1;
}

peter@mysql.com's avatar
peter@mysql.com committed
402
/* get the value of the master read flag */
403
my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
404 405 406 407
{
  return !(mysql->options.no_master_reads);
}

408 409 410 411 412

/*
  We may get an error while doing replication internals.
  In this case, we add a special explanation to the original
  error
413
*/
414 415

static void expand_error(MYSQL* mysql, int error)
416 417
{
  char tmp[MYSQL_ERRMSG_SIZE];
418 419 420 421 422 423
  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);
424 425 426
  mysql->net.last_errno = error;
}

427 428 429
/*
  This function assumes we have just called SHOW SLAVE STATUS and have
  read the given result and row
430
*/
431

432
static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
433 434
{
  MYSQL* master;
435
  DBUG_ENTER("get_master");
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
436
  if (mysql_num_fields(res) < 3)
437
    DBUG_RETURN(1); /* safety */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
438

439
  /* use the same username and password as the original connection */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
440
  if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
441
    DBUG_RETURN(1);
442
  mysql->master = master;
443
  DBUG_RETURN(0);
444 445
}

446 447 448 449

/*
  Assuming we already know that mysql points to a master connection,
  retrieve all the slaves
450
*/
451

452
static my_bool get_slaves_from_master(MYSQL* mysql)
453
{
454 455
  MYSQL_RES* res = 0;
  MYSQL_ROW row;
456
  my_bool error = 1;
457
  int has_auth_info;
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
458
  int port_ind;
459
  DBUG_ENTER("get_slaves_from_master");
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
460

461 462 463
  if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
  {
    expand_error(mysql, CR_PROBE_MASTER_CONNECT);
464
    DBUG_RETURN(1);
465
  }
466
  mysql->reconnect= 1;
467 468

  if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
469
      !(res = mysql_store_result(mysql)))
470 471
  {
    expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
472
    DBUG_RETURN(1);
473 474
  }

475
  switch (mysql_num_fields(res)) {
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
476 477 478 479 480 481 482 483
  case 5:
    has_auth_info = 0;
    port_ind=2;
    break;
  case 7:
    has_auth_info = 1;
    port_ind=4;
    break;
484 485 486 487 488 489 490 491 492 493 494
  default:
    goto err;
  }

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

    if (has_auth_info)
    {
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
495 496
      tmp_user = row[2];
      tmp_pass = row[3];
497 498 499 500 501 502 503
    }
    else
    {
      tmp_user = mysql->user;
      tmp_pass = mysql->passwd;
    }

sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
504
    if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
505
			     tmp_user, tmp_pass)))
506
      goto err;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
507

508 509 510 511 512 513
    /* Now add slave into the circular linked list */
    slave->next_slave = mysql->next_slave;
    mysql->next_slave = slave;
  }
  error = 0;
err:
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
514
  if (res)
515
    mysql_free_result(res);
516
  DBUG_RETURN(error);
517 518
}

519

520
my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
521
{
522
  MYSQL_RES *res= 0;
523
  MYSQL_ROW row;
524
  my_bool error= 1;
525 526
  DBUG_ENTER("mysql_rpl_probe");

527 528 529 530 531
  /*
    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
peter@mysql.com's avatar
peter@mysql.com committed
532
    a non-empty master host. However, it is more reliable to check
533
    for empty master than whether the slave thread is actually running
534
  */
535
  if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
536
      !(res = mysql_store_result(mysql)))
537 538
  {
    expand_error(mysql, CR_PROBE_SLAVE_STATUS);
539
    DBUG_RETURN(1);
540
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
541

542 543 544 545 546 547
  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]))
548 549
  {
    /* this is a slave, ask it for the master */
550
    if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
551 552 553 554 555
      goto err;
  }
  else
  {
    mysql->master = mysql;
556
    if (get_slaves_from_master(mysql))
557 558 559 560 561
      goto err;
  }

  error = 0;
err:
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
562
  if (res)
563
    mysql_free_result(res);
564
  DBUG_RETURN(error);
565 566 567
}


568 569 570 571 572 573 574 575 576 577
/*
  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
578
*/
579

580 581
enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
582
{
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
583
  const char *q_end= q + len;
584
  for (; q < q_end; ++q)
585 586
  {
    char c;
587
    if (my_isalpha(&my_charset_latin1, (c= *q)))
588
    {
589
      switch (my_tolower(&my_charset_latin1,c)) {
590 591 592 593 594 595 596
      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 */
597
	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
598
	  MYSQL_RPL_MASTER;
599
      case 's': /* select or show */
600
	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
601
	  MYSQL_RPL_SLAVE;
602 603 604
      case 'f': /* flush */
      case 'r': /* repair */
      case 'g': /* grant */
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
605 606 607 608 609
	return MYSQL_RPL_ADMIN;
      default:
	return MYSQL_RPL_SLAVE;
      }
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
610
  }
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
611
  return MYSQL_RPL_MASTER;		/* By default, send to master */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
612 613 614
}


hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
615 616 617 618
/**************************************************************************
  Connect to sql server
  If host == 0 then use localhost
**************************************************************************/
619

hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
620 621 622 623
#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
	      const char *user, const char *passwd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
624
{
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
625 626
  MYSQL *res;
  mysql=mysql_init(mysql);			/* Make it thread safe */
627
  {
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
628 629 630 631 632 633
    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));
    }
634
    mysql->reconnect= 1;
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
635
    DBUG_RETURN(res);
636
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
637
}
hf@deer.mysql.r18.ru's avatar
SCRUM  
hf@deer.mysql.r18.ru committed
638
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
639

640

bk@work.mysql.com's avatar
bk@work.mysql.com committed
641
/**************************************************************************
peter@mysql.com's avatar
peter@mysql.com committed
642
  Change user and database
bk@work.mysql.com's avatar
bk@work.mysql.com committed
643
**************************************************************************/
644

645 646 647 648 649
int cli_read_change_user_result(MYSQL *mysql, char *buff, const char *passwd)
{
  NET *net= &mysql->net;
  ulong pkt_length;

650
  pkt_length= cli_safe_read(mysql);
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
  
  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 */
671
    if (cli_safe_read(mysql) == packet_error)
672 673 674 675
      return 1;
  }
  return 0;
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
676

677

peter@mysql.com's avatar
peter@mysql.com committed
678
my_bool	STDCALL mysql_change_user(MYSQL *mysql, const char *user,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
679 680
				  const char *passwd, const char *db)
{
peter@mysql.com's avatar
peter@mysql.com committed
681
  char buff[512],*end=buff;
682
  int rc;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
683 684 685 686 687 688
  DBUG_ENTER("mysql_change_user");

  if (!user)
    user="";
  if (!passwd)
    passwd="";
peter@mysql.com's avatar
peter@mysql.com committed
689

690
  /* Store user into the buffer */
peter@mysql.com's avatar
peter@mysql.com committed
691
  end=strmov(end,user)+1;
peter@mysql.com's avatar
peter@mysql.com committed
692

693 694
  /* write scrambled password according to server capabilities */
  if (passwd[0])
peter@mysql.com's avatar
peter@mysql.com committed
695
  {
696
    if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
peter@mysql.com's avatar
peter@mysql.com committed
697
    {
698 699 700
      *end++= SCRAMBLE_LENGTH;
      scramble(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH;
peter@mysql.com's avatar
peter@mysql.com committed
701
    }
702
    else
703 704 705
    {
      scramble_323(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH_323 + 1;
peter@mysql.com's avatar
peter@mysql.com committed
706
    }
peter@mysql.com's avatar
peter@mysql.com committed
707 708
  }
  else
709
    *end++= '\0';                               /* empty password */
peter@mysql.com's avatar
peter@mysql.com committed
710
  /* Add database if needed */
711
  end= strmov(end, db ? db : "") + 1;
peter@mysql.com's avatar
peter@mysql.com committed
712 713

  /* Write authentication package */
peter@mysql.com's avatar
peter@mysql.com committed
714
  simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (end-buff),1);
peter@mysql.com's avatar
peter@mysql.com committed
715

716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735
  rc= (*mysql->methods->read_change_user_result)(mysql, buff, passwd);

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

    /* alloc new connect information */
    mysql->user=  my_strdup(user,MYF(MY_WME));
    mysql->passwd=my_strdup(passwd,MYF(MY_WME));
    mysql->db=    db ? my_strdup(db,MYF(MY_WME)) : 0;
  }
  DBUG_RETURN(rc);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
736 737
}

hf@deer.(none)'s avatar
hf@deer.(none) committed
738 739 740 741 742 743
#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

#if defined(__NETWARE__)
744
/* Default to value of USER on NetWare, if unset use "UNKNOWN_USER" */
hf@deer.(none)'s avatar
hf@deer.(none) committed
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790
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

791
my_bool handle_local_infile(MYSQL *mysql, const char *net_filename)
hf@deer.(none)'s avatar
hf@deer.(none) committed
792 793 794 795
{
  my_bool result= 1;
  uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
  NET *net= &mysql->net;
796 797
  int readcount;
  void *li_ptr;          /* pass state to local_infile functions */
serg@serg.mylan's avatar
serg@serg.mylan committed
798
  char *buf;		/* buffer to be filled by local_infile_read */
monty@mysql.com's avatar
monty@mysql.com committed
799
  struct st_mysql_options *options= &mysql->options;
800 801 802
  DBUG_ENTER("handle_local_infile");

  /* check that we've got valid callback functions */
monty@mysql.com's avatar
monty@mysql.com committed
803 804 805 806
  if (!(options->local_infile_init &&
	options->local_infile_read &&
	options->local_infile_end &&
	options->local_infile_error))
hf@deer.(none)'s avatar
hf@deer.(none) committed
807
  {
808
    /* if any of the functions is invalid, set the default */
monty@mysql.com's avatar
monty@mysql.com committed
809
    mysql_set_local_infile_default(mysql);
hf@deer.(none)'s avatar
hf@deer.(none) committed
810 811
  }

812
  /* copy filename into local memory and allocate read buffer */
monty@mysql.com's avatar
monty@mysql.com committed
813 814 815 816 817 818
  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);
  }
819 820

  /* initialize local infile (open file, usually) */
821 822
  if ((*options->local_infile_init)(&li_ptr, net_filename,
    options->local_infile_userdata))
hf@deer.(none)'s avatar
hf@deer.(none) committed
823
  {
824
    VOID(my_net_write(net,"",0));               /* Server needs one packet */
hf@deer.(none)'s avatar
hf@deer.(none) committed
825 826
    net_flush(net);
    strmov(net->sqlstate, unknown_sqlstate);
monty@mysql.com's avatar
monty@mysql.com committed
827 828 829
    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
830 831 832
    goto err;
  }

833
  /* read blocks of data from local infile callback */
monty@mysql.com's avatar
monty@mysql.com committed
834 835 836
  while ((readcount =
	  (*options->local_infile_read)(li_ptr, buf,
					packet_length)) > 0)
hf@deer.(none)'s avatar
hf@deer.(none) committed
837 838 839
  {
    if (my_net_write(net,buf,readcount))
    {
monty@mysql.com's avatar
monty@mysql.com committed
840 841
      DBUG_PRINT("error",
		 ("Lost connection to MySQL server during LOAD DATA of local file"));
hf@deer.(none)'s avatar
hf@deer.(none) committed
842 843 844 845 846 847
      strmov(net->sqlstate, unknown_sqlstate);
      net->last_errno=CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));
      goto err;
    }
  }
848

hf@deer.(none)'s avatar
hf@deer.(none) committed
849 850 851 852 853 854 855 856
  /* 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;
  }
857

hf@deer.(none)'s avatar
hf@deer.(none) committed
858 859
  if (readcount < 0)
  {
monty@mysql.com's avatar
monty@mysql.com committed
860 861 862
    net->last_errno= (*options->local_infile_error)(li_ptr,
						    net->last_error,
						    sizeof(net->last_error)-1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
863 864
    goto err;
  }
865

hf@deer.(none)'s avatar
hf@deer.(none) committed
866 867 868
  result=0;					/* Ok */

err:
869
  /* free up memory allocated with _init, usually */
monty@mysql.com's avatar
monty@mysql.com committed
870
  (*options->local_infile_end)(li_ptr);
871
  my_free(buf, MYF(0));
hf@deer.(none)'s avatar
hf@deer.(none) committed
872
  DBUG_RETURN(result);
873 874 875
}


monty@mysql.com's avatar
monty@mysql.com committed
876 877 878 879 880 881
/****************************************************************************
  Default handlers for LOAD LOCAL INFILE
****************************************************************************/

typedef struct st_default_local_infile
{
882 883
  int fd;
  int error_num;
monty@mysql.com's avatar
monty@mysql.com committed
884
  const char *filename;
885 886 887 888
  char error_msg[LOCAL_INFILE_ERROR_LEN];
} default_local_infile_data;


monty@mysql.com's avatar
monty@mysql.com committed
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906
/*
  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
*/

907 908
static int default_local_infile_init(void **ptr, const char *filename,
             void *userdata __attribute__ ((unused)))
909 910
{
  default_local_infile_data *data;
monty@mysql.com's avatar
monty@mysql.com committed
911
  char tmp_name[FN_REFLEN];
912 913

  if (!(*ptr= data= ((default_local_infile_data *)
monty@mysql.com's avatar
monty@mysql.com committed
914 915
		     my_malloc(sizeof(default_local_infile_data),  MYF(0)))))
    return 1; /* out of memory */
916 917 918

  data->error_msg[0]= 0;
  data->error_num=    0;
monty@mysql.com's avatar
monty@mysql.com committed
919
  data->filename= filename;
920

monty@mysql.com's avatar
monty@mysql.com committed
921 922
  fn_format(tmp_name, filename, "", "", MY_UNPACK_FILENAME);
  if ((data->fd = my_open(tmp_name, O_RDONLY, MYF(0))) < 0)
923
  {
monty@mysql.com's avatar
monty@mysql.com committed
924
    data->error_num= my_errno;
925
    my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
monty@mysql.com's avatar
monty@mysql.com committed
926 927
                EE(EE_FILENOTFOUND), tmp_name, data->error_num);
    return 1;
928 929 930 931 932
  }
  return 0; /* ok */
}


monty@mysql.com's avatar
monty@mysql.com committed
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948
/*
  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)
949
{
monty@mysql.com's avatar
monty@mysql.com committed
950 951
  int count;
  default_local_infile_data*data = (default_local_infile_data *) ptr;
952

monty@mysql.com's avatar
monty@mysql.com committed
953 954 955 956 957 958 959 960
  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;
961 962 963
}


monty@mysql.com's avatar
monty@mysql.com committed
964 965 966 967 968 969 970 971 972 973 974 975
/*
  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)
976
{
monty@mysql.com's avatar
monty@mysql.com committed
977 978
  default_local_infile_data *data= (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
979
  {
monty@mysql.com's avatar
monty@mysql.com committed
980 981 982
    if (data->fd >= 0)
      my_close(data->fd, MYF(MY_WME));
    my_free(ptr, MYF(MY_WME));
983 984 985 986
  }
}


monty@mysql.com's avatar
monty@mysql.com committed
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
/*
  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
1002 1003
default_local_infile_error(void *ptr, char *error_msg, uint error_msg_len)
{
monty@mysql.com's avatar
monty@mysql.com committed
1004 1005 1006
  default_local_infile_data *data = (default_local_infile_data *) ptr;
  if (data)					/* If not error on open */
  {
1007 1008 1009
    strmake(error_msg, data->error_msg, error_msg_len);
    return data->error_num;
  }
monty@mysql.com's avatar
monty@mysql.com committed
1010 1011 1012
  /* 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;
1013 1014 1015
}


monty@mysql.com's avatar
monty@mysql.com committed
1016
void
1017
mysql_set_local_infile_handler(MYSQL *mysql,
1018 1019
                               int (*local_infile_init)(void **, const char *,
                               void *),
1020
                               int (*local_infile_read)(void *, char *, uint),
monty@mysql.com's avatar
monty@mysql.com committed
1021
                               void (*local_infile_end)(void *),
1022 1023
                               int (*local_infile_error)(void *, char *, uint),
                               void *userdata)
1024
{
monty@mysql.com's avatar
monty@mysql.com committed
1025 1026 1027 1028
  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;
1029
  mysql->options.local_infile_userdata = userdata;
1030 1031 1032
}


monty@mysql.com's avatar
monty@mysql.com committed
1033
void mysql_set_local_infile_default(MYSQL *mysql)
1034 1035 1036 1037 1038
{
  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;
hf@deer.(none)'s avatar
hf@deer.(none) committed
1039 1040 1041
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
1042
/**************************************************************************
1043 1044
  Do a query. If query returned rows, free old rows.
  Read data by mysql_store_result or by repeat call of mysql_fetch_row
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1045 1046 1047 1048 1049 1050 1051 1052
**************************************************************************/

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

hf@deer.(none)'s avatar
hf@deer.(none) committed
1053

1054
static MYSQL* spawn_init(MYSQL* parent, const char* host,
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1055 1056
			 unsigned int port, const char* user,
			 const char* passwd)
1057 1058
{
  MYSQL* child;
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
  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));
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1075
  if (parent->db)
1076
    child->options.db= my_strdup(parent->db, MYF(0));
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1077
  else if (parent->options.db)
1078
    child->options.db= my_strdup(parent->options.db, MYF(0));
1079

1080 1081 1082 1083 1084 1085
  /*
    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);
1086 1087 1088 1089 1090
}


int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1091 1092
			 unsigned int port, const char* user,
			 const char* passwd)
1093 1094 1095
{
  if (mysql->master != mysql && !mysql->master->rpl_pivot)
    mysql_close(mysql->master);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1096
  if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
1097 1098 1099 1100
    return 1;
  return 0;
}

1101

1102 1103
int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
1104 1105 1106
			unsigned int port,
			const char* user,
			const char* passwd)
1107 1108
{
  MYSQL* slave;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1109
  if (!(slave = spawn_init(mysql, host, port, user, passwd)))
1110 1111 1112 1113 1114 1115
    return 1;
  slave->next_slave = mysql->next_slave;
  mysql->next_slave = slave;
  return 0;
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1116
/**************************************************************************
1117
  Return next field of the query results
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
**************************************************************************/

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

1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144

/**************************************************************************
  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;
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
1145
/*************************************************************************
1146 1147 1148
  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
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
*************************************************************************/

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;
}

1169

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1170
/*****************************************************************************
1171
  List all databases
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
*****************************************************************************/

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));
}


/*****************************************************************************
1188 1189
  List all tables in a database
  If wild is given then only the tables matching wild is returned
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
*****************************************************************************/

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));
}

1204

1205
MYSQL_FIELD *cli_list_fields(MYSQL *mysql)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1206 1207 1208 1209 1210 1211
{
  MYSQL_DATA *query;
  if (!(query= cli_read_rows(mysql,(MYSQL_FIELD*) 0, 
			     protocol_41(mysql) ? 8 : 6)))
    return NULL;

1212
  mysql->field_count= (uint) query->rows;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1213
  return unpack_fields(query,&mysql->field_alloc,
1214
		       mysql->field_count, 1, mysql->server_capabilities);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1215 1216 1217
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
1218
/**************************************************************************
1219 1220 1221 1222
  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"
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1223 1224 1225
**************************************************************************/

MYSQL_RES * STDCALL
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1226
mysql_list_fields(MYSQL *mysql, const char *table, const char *wild)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1227
{
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1228 1229
  MYSQL_RES   *result;
  MYSQL_FIELD *fields;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1230 1231 1232 1233 1234
  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);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1235
  free_old_query(mysql);
1236
  if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1237
      !(fields= (*mysql->methods->list_fields)(mysql)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1238 1239 1240 1241 1242
    DBUG_RETURN(NULL);

  if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
					 MYF(MY_WME | MY_ZEROFILL))))
    DBUG_RETURN(NULL);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1243

1244
  result->methods= mysql->methods;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1245 1246
  result->field_alloc=mysql->field_alloc;
  mysql->fields=0;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1247 1248
  result->field_count = mysql->field_count;
  result->fields= fields;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
  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);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1269 1270
  if (!(fields = (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*) 0,
					      protocol_41(mysql) ? 7 : 5)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1271 1272
    DBUG_RETURN(NULL);
  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
1273
				    mysql->server_capabilities)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1274 1275 1276 1277 1278 1279
    DBUG_RETURN(0);
  mysql->status=MYSQL_STATUS_GET_RESULT;
  mysql->field_count=field_count;
  DBUG_RETURN(mysql_store_result(mysql));
}

1280

1281
#ifdef USE_OLD_FUNCTIONS
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1282 1283 1284 1285 1286
int  STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_createdb");
  DBUG_PRINT("enter",("db: %s",db));
1287
  DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1288 1289 1290 1291 1292 1293 1294 1295
}


int  STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_drop_db");
  DBUG_PRINT("enter",("db: %s",db));
1296
  DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1297
}
1298
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1299 1300 1301


int STDCALL
1302
mysql_shutdown(MYSQL *mysql, enum mysql_enum_shutdown_level shutdown_level)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1303
{
1304
  uchar level[1];
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1305
  DBUG_ENTER("mysql_shutdown");
1306
  level[0]= (uchar) shutdown_level;
1307
  DBUG_RETURN(simple_command(mysql, COM_SHUTDOWN, (char *)level, 1, 0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
}


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));
}

1320

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1321 1322 1323
int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
1324
  char buff[4];
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1325 1326
  DBUG_ENTER("mysql_kill");
  int4store(buff,pid);
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
  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));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1338 1339 1340 1341 1342 1343 1344 1345 1346 1347
}


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

1348

konstantin@oak.local's avatar
konstantin@oak.local committed
1349
const char *cli_read_statistics(MYSQL *mysql)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1350 1351 1352 1353
{
  mysql->net.read_pos[mysql->packet_length]=0;	/* End of stat string */
  if (!mysql->net.read_pos[0])
  {
1354
    strmov(mysql->net.sqlstate, unknown_sqlstate);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1355 1356 1357 1358
    mysql->net.last_errno=CR_WRONG_HOST_INFO;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    return mysql->net.last_error;
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
1359 1360 1361
  return (char*) mysql->net.read_pos;
}

1362

hf@deer.(none)'s avatar
hf@deer.(none) committed
1363 1364 1365 1366 1367
const char * STDCALL
mysql_stat(MYSQL *mysql)
{
  DBUG_ENTER("mysql_stat");
  if (simple_command(mysql,COM_STATISTICS,0,0,0))
1368
    DBUG_RETURN(mysql->net.last_error);
konstantin@oak.local's avatar
konstantin@oak.local committed
1369
  DBUG_RETURN((*mysql->methods->read_statistics)(mysql));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1370 1371 1372 1373 1374 1375
}


int STDCALL
mysql_ping(MYSQL *mysql)
{
1376
  int res;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1377
  DBUG_ENTER("mysql_ping");
1378 1379 1380 1381
  res= simple_command(mysql,COM_PING,0,0,0);
  if (res == CR_SERVER_LOST && mysql->reconnect)
    res= simple_command(mysql,COM_PING,0,0,0);
  DBUG_RETURN(res);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1382 1383 1384
}


monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1385
const char * STDCALL
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1386 1387 1388 1389 1390 1391
mysql_get_server_info(MYSQL *mysql)
{
  return((char*) mysql->server_version);
}


monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1392
const char * STDCALL
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404
mysql_get_host_info(MYSQL *mysql)
{
  return(mysql->host_info);
}


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

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1405
const char * STDCALL
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1406 1407 1408 1409 1410
mysql_get_client_info(void)
{
  return (char*) MYSQL_SERVER_VERSION;
}

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
1411 1412 1413 1414 1415
ulong STDCALL mysql_get_client_version(void)
{
  return MYSQL_VERSION_ID;
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
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;
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1431
MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1432 1433 1434 1435
{
  return res->data_cursor;
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1436
MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1437 1438 1439 1440 1441 1442 1443 1444
{
  return (res)->current_field;
}

/* MYSQL */

unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
1445
  return mysql->last_used_con->field_count;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1446 1447 1448 1449
}

my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
1450
  return mysql->last_used_con->affected_rows;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1451 1452 1453 1454
}

my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
1455
  return mysql->last_used_con->insert_id;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1456 1457
}

1458 1459 1460 1461 1462
const char *STDCALL mysql_sqlstate(MYSQL *mysql)
{
  return mysql->net.sqlstate;
}

1463 1464 1465 1466 1467
uint STDCALL mysql_warning_count(MYSQL *mysql)
{
  return mysql->warning_count;
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1468
const char *STDCALL mysql_info(MYSQL *mysql)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1469
{
1470
  return mysql->info;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1471 1472 1473 1474 1475 1476 1477 1478 1479
}

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

const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
bar@mysql.com's avatar
bar@mysql.com committed
1480
  return mysql->charset->csname;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1481 1482
}

1483
void STDCALL mysql_get_character_set_info(MYSQL *mysql, MY_CHARSET_INFO *csinfo)
1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497
{
  csinfo->number   = mysql->charset->number;
  csinfo->state    = mysql->charset->state;
  csinfo->csname   = mysql->charset->csname;
  csinfo->name     = mysql->charset->name;
  csinfo->comment  = mysql->charset->comment;
  csinfo->mbminlen = mysql->charset->mbminlen;
  csinfo->mbmaxlen = mysql->charset->mbmaxlen;

  if (mysql->options.charset_dir)
    csinfo->dir = mysql->options.charset_dir;
  else
    csinfo->dir = charsets_dir;
}
monty@mysql.com's avatar
monty@mysql.com committed
1498

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1499 1500 1501 1502 1503 1504 1505 1506 1507
uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

1508 1509 1510 1511 1512 1513 1514 1515 1516 1517

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

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1518
/****************************************************************************
1519
  Some support functions
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1520 1521
****************************************************************************/

1522 1523 1524 1525 1526 1527 1528
/*
  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;
1529 1530
  my_net_set_read_timeout(net, CLIENT_NET_READ_TIMEOUT);
  my_net_set_write_timeout(net, CLIENT_NET_WRITE_TIMEOUT);
1531
  net->retry_count=  1;
1532 1533 1534
  net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}

monty@mysql.com's avatar
monty@mysql.com committed
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554
/*
  This function is used to create HEX string that you
  can use in a SQL statement in of the either ways:
    INSERT INTO blob_column VALUES (0xAABBCC);  (any MySQL version)
    INSERT INTO blob_column VALUES (X'AABBCC'); (4.1 and higher)
  
  The string in "from" is encoded to a HEX string.
  The result is placed in "to" and a terminating null byte is appended.
  
  The string pointed to by "from" must be "length" bytes long.
  You must allocate the "to" buffer to be at least length*2+1 bytes long.
  Each character needs two bytes, and you need room for the terminating
  null byte. When mysql_hex_string() returns, the contents of "to" will
  be a null-terminated string. The return value is the length of the
  encoded string, not including the terminating null character.

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

bar@mysql.com's avatar
bar@mysql.com committed
1555 1556
ulong STDCALL
mysql_hex_string(char *to, const char *from, ulong length)
monty@mysql.com's avatar
monty@mysql.com committed
1557 1558 1559 1560 1561 1562
{
  char *to0= to;
  const char *end;
            
  for (end= from + length; from < end; from++)
  {
monty@mysql.com's avatar
monty@mysql.com committed
1563 1564
    *to++= _dig_vec_upper[((unsigned char) *from) >> 4];
    *to++= _dig_vec_upper[((unsigned char) *from) & 0x0F];
monty@mysql.com's avatar
monty@mysql.com committed
1565 1566 1567 1568 1569
  }
  *to= '\0';
  return (ulong) (to-to0);
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1570
/*
1571 1572 1573
  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
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1574 1575 1576 1577 1578
*/

ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
serg@serg.mylan's avatar
serg@serg.mylan committed
1579
  return escape_string_for_mysql(default_charset_info, to, 0, from, length);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1580 1581 1582 1583 1584 1585
}

ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
			 ulong length)
{
1586 1587
  if (mysql->server_status & SERVER_STATUS_NO_BACKSLASH_ESCAPES)
    return escape_quotes_for_mysql(mysql->charset, to, 0, from, length);
1588
  return escape_string_for_mysql(mysql->charset, to, 0, from, length);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692
}


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;
}
1693 1694

/********************************************************************
1695
 Implementation of new client API for 4.1 version.
1696

1697
 mysql_stmt_* are real prototypes used by applications.
1698

1699 1700 1701 1702 1703
 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.
1704 1705
*********************************************************************/

1706
/******************* Declarations ***********************************/
1707

1708
/* Default number of rows fetched per one COM_STMT_FETCH command. */
1709

monty@mysql.com's avatar
monty@mysql.com committed
1710
#define DEFAULT_PREFETCH_ROWS (ulong) 1
1711

1712
/*
1713 1714 1715 1716 1717
  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)
1718 1719
*/

1720 1721
static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row);
static int stmt_read_row_buffered(MYSQL_STMT *stmt, unsigned char **row);
1722
static int stmt_read_row_from_cursor(MYSQL_STMT *stmt, unsigned char **row);
1723
static int stmt_read_row_no_data(MYSQL_STMT *stmt, unsigned char **row);
1724
static int stmt_read_row_no_result_set(MYSQL_STMT *stmt, unsigned char **row);
1725

1726 1727 1728 1729 1730
/*
  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);
1731
static my_bool setup_one_fetch_function(MYSQL_BIND *, MYSQL_FIELD *field);
1732

1733 1734 1735 1736
/* Auxilary function used to reset statement handle. */

#define RESET_SERVER_SIDE 1
#define RESET_LONG_DATA 2
1737
#define RESET_STORE_RESULT 4
1738 1739 1740

static my_bool reset_stmt_handle(MYSQL_STMT *stmt, uint flags);

1741 1742 1743 1744 1745 1746
/*
  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) */
1747
#define MAX_DATE_REP_LENGTH 5
1748 1749 1750 1751 1752

/*
  1 (length) + 1 (is negative) + 4 (day count) + 1 (hour)
  + 1 (minute) + 1 (seconds) + 4 (microseconds)
*/
1753
#define MAX_TIME_REP_LENGTH 13
1754 1755 1756 1757 1758

/*
  1 (length) + 2 (year) + 1 (month) + 1 (day) +
  1 (hour) + 1 (minute) + 1 (second) + 4 (microseconds)
*/
1759
#define MAX_DATETIME_REP_LENGTH 12
1760

1761
#define MAX_DOUBLE_STRING_REP_LENGTH 331
1762

1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776
/* A macro to check truncation errors */

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

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

1777
/**************** Misc utility functions ****************************/
1778 1779

/*
1780
  Reallocate the NET package to have at least length bytes available.
1781

1782
  SYNPOSIS
1783 1784 1785 1786
    my_realloc_str()
    net                 The NET structure to modify.
    length              Ensure that net->buff has space for at least
                        this number of bytes.
1787

1788
  RETURN VALUES
1789 1790 1791
    0   Success.
    1   Error, i.e. out of memory or requested packet size is bigger
        than max_allowed_packet. The error code is stored in net->last_errno.
1792 1793
*/

1794
static my_bool my_realloc_str(NET *net, ulong length)
1795
{
1796 1797 1798 1799
  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)
1800
  {
1801 1802
    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
1803
  }
1804
  DBUG_RETURN(res);
1805 1806 1807
}


1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
/* Clear possible error statee of struct NET */

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

1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
static void stmt_clear_error(MYSQL_STMT *stmt)
{
  if (stmt->last_errno)
  {
    stmt->last_errno= 0;
    stmt->last_error[0]= '\0';
    strmov(stmt->sqlstate, not_error_sqlstate);
  }
}

1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
/*
  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;
}
1868

1869
/*
1870
  Read and unpack server reply to COM_STMT_PREPARE command (sent from
1871
  mysql_stmt_prepare).
1872

1873 1874 1875 1876
  SYNOPSIS
    cli_read_prepare_result()
    mysql   connection handle
    stmt    statement handle
1877 1878 1879 1880

  RETURN VALUES
    0	ok
    1	error
1881 1882
*/

1883
my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
1884 1885
{
  uchar *pos;
1886 1887
  uint field_count, param_count;
  ulong packet_length;
1888
  MYSQL_DATA *fields_data;
1889
  DBUG_ENTER("cli_read_prepare_result");
1890

1891
  mysql= mysql->last_used_con;
1892
  if ((packet_length= cli_safe_read(mysql)) == packet_error)
1893
    DBUG_RETURN(1);
monty@mysql.com's avatar
monty@mysql.com committed
1894
  mysql->warning_count= 0;
1895

1896
  pos= (uchar*) mysql->net.read_pos;
1897
  stmt->stmt_id= uint4korr(pos+1); pos+= 5;
1898
  /* Number of columns in result set */
1899
  field_count=   uint2korr(pos);   pos+= 2;
1900
  /* Number of placeholders in the statement */
1901
  param_count=   uint2korr(pos);   pos+= 2;
monty@mysql.com's avatar
monty@mysql.com committed
1902 1903
  if (packet_length >= 12)
    mysql->warning_count= uint2korr(pos+1);
1904

1905 1906 1907 1908 1909 1910 1911 1912 1913 1914
  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);
  }

1915 1916 1917 1918
  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
1919

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1920
    if (!(fields_data= (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*)0,7)))
1921 1922 1923 1924 1925 1926
      DBUG_RETURN(1);
    if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
				      field_count,0,
				      mysql->server_capabilities)))
      DBUG_RETURN(1);
  }
monty@mysql.com's avatar
monty@mysql.com committed
1927
  stmt->field_count=  field_count;
1928
  stmt->param_count=  (ulong) param_count;
monty@mysql.com's avatar
monty@mysql.com committed
1929 1930
  DBUG_PRINT("exit",("field_count: %u  param_count: %u  warning_count: %u",
                     field_count, param_count, (uint) mysql->warning_count));
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
1931

1932 1933 1934 1935 1936
  DBUG_RETURN(0);
}


/*
1937 1938
  Allocate memory and init prepared statement structure.

1939 1940
  SYNOPSIS
    mysql_stmt_init()
1941 1942 1943 1944 1945 1946 1947
    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
paul@ice.snake.net's avatar
paul@ice.snake.net committed
1948
    handle provided to this call: its lifetime is limited by lifetime
1949 1950 1951 1952 1953 1954
    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()),
paul@ice.snake.net's avatar
paul@ice.snake.net committed
1955
    - close statement handle and free its memory (mysql_stmt_close()),
1956 1957 1958 1959 1960
    - 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).
1961

1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
  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);
  }

1980
  init_alloc_root(&stmt->mem_root, 2048, 2048);
1981 1982
  init_alloc_root(&stmt->result.alloc, 4096, 4096);
  stmt->result.alloc.min_malloc= sizeof(MYSQL_ROWS);
1983 1984
  mysql->stmts= list_add(mysql->stmts, &stmt->list);
  stmt->list.data= stmt;
1985
  stmt->state= MYSQL_STMT_INIT_DONE;
1986
  stmt->mysql= mysql;
1987
  stmt->read_row_func= stmt_read_row_no_result_set;
1988
  stmt->prefetch_rows= DEFAULT_PREFETCH_ROWS;
1989
  strmov(stmt->sqlstate, not_error_sqlstate);
1990
  /* The rest of statement members was bzeroed inside malloc */
1991 1992 1993 1994

  DBUG_RETURN(stmt);
}

1995

1996
/*
1997 1998
  Prepare server side statement with query.

1999 2000
  SYNOPSIS
    mysql_stmt_prepare()
2001 2002 2003
    stmt    statement handle
    query   statement to prepare
    length  statement length
2004 2005

  DESCRIPTION
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
    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
2019
    structure on the server and free old statement data
2020
  - then send the query to server and get back number of placeholders,
2021
    number of columns in result set (if any), and result set metadata.
2022
    At the same time allocate memory for input and output parameters
2023
    to have less checks in mysql_stmt_bind_{param, result}.
2024

2025 2026
  RETURN VALUES
    0  success
2027
   !0  error
2028 2029
*/

2030 2031
int STDCALL
mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query, ulong length)
2032
{
2033 2034 2035
  MYSQL *mysql= stmt->mysql;
  DBUG_ENTER("mysql_stmt_prepare");

2036
  if (!mysql)
2037
  {
2038 2039
    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
2040
    DBUG_RETURN(1);
2041
  }
2042

2043 2044 2045 2046 2047 2048 2049
  /*
    Reset the last error in any case: that would clear the statement
    if the previous prepare failed.
  */
  stmt->last_errno= 0;
  stmt->last_error[0]= '\0';

2050 2051 2052
  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    /* This is second prepare with another statement */
2053
    char buff[MYSQL_STMT_HEADER];               /* 4 bytes - stmt id */
2054

2055
    if (reset_stmt_handle(stmt, RESET_LONG_DATA | RESET_STORE_RESULT))
2056
      DBUG_RETURN(1);
2057
    /*
2058
      These members must be reset for API to
2059 2060 2061 2062 2063 2064 2065
      function in case of error or misuse.
    */
    stmt->bind_param_done= stmt->bind_result_done= FALSE;
    stmt->param_count= stmt->field_count= 0;
    free_root(&stmt->mem_root, MYF(MY_KEEP_PREALLOC));

    int4store(buff, stmt->stmt_id);
2066

2067
    /*
2068 2069
      Close statement in server

2070 2071 2072 2073
      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.
    */
2074
    stmt->state= MYSQL_STMT_INIT_DONE;
2075
    if (stmt_command(mysql, COM_STMT_CLOSE, buff, 4, stmt))
2076 2077 2078 2079 2080 2081 2082
    {
      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                      mysql->net.sqlstate);
      DBUG_RETURN(1);
    }
  }

2083
  if (stmt_command(mysql, COM_STMT_PREPARE, query, length, stmt))
2084
  {
2085 2086 2087
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
2088 2089
  }

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2090
  if ((*mysql->methods->read_prepare_result)(mysql, stmt))
2091 2092 2093
  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                    mysql->net.sqlstate);
2094
    DBUG_RETURN(1);
2095
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
2096

2097
  /*
2098
    alloc_root will return valid address even in case when param_count
2099 2100 2101 2102
    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.
  */
hf@deer.(none)'s avatar
hf@deer.(none) committed
2103 2104
  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
2105
                                                (stmt->param_count +
hf@deer.(none)'s avatar
hf@deer.(none) committed
2106 2107 2108
                                                 stmt->field_count))))
  {
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2109
    DBUG_RETURN(1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
2110 2111
  }
  stmt->bind= stmt->params + stmt->param_count;
2112
  stmt->state= MYSQL_STMT_PREPARE_DONE;
2113
  DBUG_PRINT("info", ("Parameter count: %u", stmt->param_count));
2114
  DBUG_RETURN(0);
2115 2116
}

2117
/*
2118 2119 2120 2121
  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.
2122 2123
*/

2124
static unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
2125
{
2126 2127
  MYSQL_FIELD *fields, *field, *end;
  MEM_ROOT *alloc= &stmt->mem_root;
2128
  MYSQL *mysql= stmt->mysql->last_used_con;
2129

2130
  stmt->field_count= mysql->field_count;
2131

2132
  /*
2133
    Get the field information for non-select statements
2134 2135
    like SHOW and DESCRIBE commands
  */
2136
  if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc,
2137
						 sizeof(MYSQL_FIELD) *
2138 2139
						 stmt->field_count)) ||
      !(stmt->bind= (MYSQL_BIND *) alloc_root(alloc,
2140 2141
					      sizeof(MYSQL_BIND) *
					      stmt->field_count)))
2142
    return 0;
2143 2144

  for (fields= mysql->fields, end= fields+stmt->field_count,
2145
	 field= stmt->fields;
2146 2147 2148 2149 2150 2151 2152
       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);
2153
    field->charsetnr= fields->charsetnr;
2154 2155 2156 2157 2158 2159 2160
    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;
  }
2161 2162
  return stmt->field_count;
}
2163

2164 2165 2166

/*
  Update result set columns metadata if it was sent again in
2167
  reply to COM_STMT_EXECUTE.
2168 2169 2170 2171 2172 2173 2174
*/

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;
2175
  MYSQL_BIND *my_bind= stmt->bind_result_done ? stmt->bind : 0;
2176 2177 2178 2179 2180 2181 2182 2183 2184 2185

  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;
2186
    if (my_bind)
2187 2188
    {
      /* Ignore return value: it should be 0 if bind_result succeeded. */
2189
      (void) setup_one_fetch_function(my_bind++, stmt_field);
2190
    }
2191 2192 2193
  }
}

2194
/*
2195 2196 2197 2198 2199 2200 2201 2202 2203
  Returns prepared statement metadata in the form of a result set.

  SYNOPSIS
    mysql_stmt_result_metadata()
    stmt  statement handle

  DESCRIPTION
    This function should be used after mysql_stmt_execute().
    You can safely check that prepared statement has a result set by calling
2204
    mysql_stmt_field_count(): if number of fields is not zero, you can call
2205 2206 2207 2208
    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
2209
      mysql_stmt_field_count())
2210 2211 2212 2213
    - 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.
2214 2215 2216 2217 2218 2219

  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
2220 2221 2222
*/

MYSQL_RES * STDCALL
2223
mysql_stmt_result_metadata(MYSQL_STMT *stmt)
2224 2225
{
  MYSQL_RES *result;
2226
  DBUG_ENTER("mysql_stmt_result_metadata");
2227

2228 2229 2230 2231 2232 2233 2234 2235 2236
  /*
    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))))
2237
  {
2238 2239 2240
    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
    DBUG_RETURN(0);
  }
2241

2242 2243
  result->methods=	stmt->mysql->methods;
  result->eof=		1;                      /* Marker for buffered */
2244 2245
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
2246
  /* The rest of members of 'result' was bzeroed inside malloc */
2247
  DBUG_RETURN(result);
2248 2249
}

2250

2251
/*
2252 2253
  Returns parameter columns meta information in the form of
  result set.
2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266

  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.
2267 2268 2269
*/

MYSQL_RES * STDCALL
2270
mysql_stmt_param_metadata(MYSQL_STMT *stmt)
2271
{
2272
  DBUG_ENTER("mysql_stmt_param_metadata");
2273

2274 2275 2276 2277
  if (!stmt->param_count)
    DBUG_RETURN(0);

  /*
2278 2279
    TODO: Fix this when server sends the information.
    Till then keep a dummy prototype.
2280 2281 2282 2283 2284
  */
  DBUG_RETURN(0); 
}


2285 2286 2287 2288 2289 2290 2291 2292 2293 2294
/* 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;
}


2295 2296
/*
  Functions to store parameter data in network packet.
2297

2298 2299 2300 2301 2302
  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

2303
  DESCRIPTION
2304 2305 2306 2307 2308
    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).
2309
*/
2310 2311 2312

static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
2313
  *(net->write_pos++)= *(uchar *) param->buffer;
2314 2315
}

2316 2317 2318 2319 2320 2321
static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
2322

2323
static void store_param_int32(NET *net, MYSQL_BIND *param)
2324
{
2325 2326 2327 2328
  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
2329

2330 2331 2332 2333 2334 2335
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
2336

2337 2338 2339 2340 2341
static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
2342 2343
}

2344 2345 2346 2347 2348 2349
static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
2350

2351 2352 2353
static void store_param_time(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
2354
  char buff[MAX_TIME_REP_LENGTH], *pos;
2355 2356 2357 2358 2359 2360 2361 2362 2363 2364
  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)
2365
    length= 12;
2366 2367 2368 2369
  else if (tm->hour || tm->minute || tm->second || tm->day)
    length= 8;
  else
    length= 0;
2370
  buff[0]= (char) length++;
2371 2372 2373 2374 2375 2376
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
2377
  char buff[MAX_DATETIME_REP_LENGTH], *pos;
2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396
  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;
2397
  buff[0]= (char) length++;
2398 2399 2400 2401 2402 2403
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void store_param_date(NET *net, MYSQL_BIND *param)
{
2404 2405 2406
  MYSQL_TIME tm= *((MYSQL_TIME *) param->buffer);
  tm.hour= tm.minute= tm.second= tm.second_part= 0;
  net_store_datetime(net, &tm);
2407 2408 2409 2410 2411 2412 2413
}

static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  net_store_datetime(net, tm);
}
2414

2415
static void store_param_str(NET *net, MYSQL_BIND *param)
2416
{
2417 2418
  /* param->length is always set in mysql_stmt_bind_param */
  ulong length= *param->length;
2419 2420
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
2421
  net->write_pos= (uchar*) to+length;
2422 2423
}

2424

2425
/*
2426 2427 2428 2429 2430 2431 2432 2433 2434
  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
2435 2436
    if a parameter is NULL. Unlike bit string in result set row, here
    we don't have reserved bits for OK/error packet.
2437 2438
*/

2439
static void store_param_null(NET *net, MYSQL_BIND *param)
2440
{
2441
  uint pos= param->param_number;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
2442
  net->buff[pos/8]|=  (uchar) (1 << (pos & 7));
2443
}
2444 2445 2446


/*
2447 2448 2449
  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.
2450 2451
*/

2452
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
2453
{
2454
  NET *net= &stmt->mysql->net;
2455
  DBUG_ENTER("store_param");
2456
  DBUG_PRINT("enter",("type: %d  buffer: 0x%lx  length: %lu  is_null: %d",
2457
		      param->buffer_type,
2458 2459
		      (long) (param->buffer ? param->buffer : NullS),
                      *param->length, *param->is_null));
2460 2461

  if (*param->is_null)
2462 2463
    store_param_null(net, param);
  else
venu@myvenu.com's avatar
venu@myvenu.com committed
2464
  {
2465 2466
    /*
      Param->length should ALWAYS point to the correct length for the type
2467
      Either to the length pointer given by the user or param->buffer_length
2468
    */
2469
    if ((my_realloc_str(net, *param->length)))
2470
    {
2471
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
venu@myvenu.com's avatar
venu@myvenu.com committed
2472
      DBUG_RETURN(1);
2473
    }
2474
    (*param->store_param_func)(net, param);
venu@myvenu.com's avatar
venu@myvenu.com committed
2475 2476
  }
  DBUG_RETURN(0);
2477 2478
}

2479

2480
/*
2481
  Auxilary function to send COM_STMT_EXECUTE packet to server and read reply.
2482
  Used from cli_stmt_execute, which is in turn used by mysql_stmt_execute.
2483 2484
*/

2485
static my_bool execute(MYSQL_STMT *stmt, char *packet, ulong length)
2486
{
2487 2488
  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
2489
  char buff[4 /* size of stmt id */ +
2490
            5 /* execution flags */];
2491 2492
  my_bool res;

2493
  DBUG_ENTER("execute");
2494
  DBUG_DUMP("packet", packet, length);
2495

2496 2497
  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
2498
  buff[4]= (char) stmt->flags;
2499
  int4store(buff+5, 1);                         /* iteration count */
2500

2501
  res= test(cli_advanced_command(mysql, COM_STMT_EXECUTE, buff, sizeof(buff),
2502 2503 2504
                                 packet, length, 1, NULL) ||
            (*mysql->methods->read_query_result)(mysql));
  stmt->affected_rows= mysql->affected_rows;
2505
  stmt->server_status= mysql->server_status;
2506 2507
  stmt->insert_id= mysql->insert_id;
  if (res)
2508
  {
2509
    set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
2510
    DBUG_RETURN(1);
2511 2512 2513 2514
  }
  DBUG_RETURN(0);
}

2515 2516

int cli_stmt_execute(MYSQL_STMT *stmt)
2517
{
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2518
  DBUG_ENTER("cli_stmt_execute");
2519 2520 2521

  if (stmt->param_count)
  {
2522 2523
    MYSQL *mysql= stmt->mysql;
    NET        *net= &mysql->net;
2524
    MYSQL_BIND *param, *param_end;
2525
    char       *param_data;
venu@myvenu.com's avatar
venu@myvenu.com committed
2526 2527 2528
    ulong length;
    uint null_count;
    my_bool    result;
2529

2530 2531 2532 2533 2534
    if (!stmt->bind_param_done)
    {
      set_stmt_error(stmt, CR_PARAMS_NOT_BOUND, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2535 2536
    if (mysql->status != MYSQL_STATUS_READY ||
        mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
2537 2538 2539 2540
    {
      set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2541

2542 2543 2544
    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
2545 2546 2547 2548 2549
    if (my_realloc_str(net, null_count + 1))
    {
      set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
      DBUG_RETURN(1);
    }
2550 2551 2552 2553 2554
    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 */
venu@myvenu.com's avatar
venu@myvenu.com committed
2555 2556
    *(net->write_pos)++= (uchar) stmt->send_types_to_server;
    if (stmt->send_types_to_server)
2557
    {
2558 2559 2560 2561 2562
      if (my_realloc_str(net, 2 * stmt->param_count))
      {
        set_stmt_error(stmt, net->last_errno, unknown_sqlstate);
        DBUG_RETURN(1);
      }
2563 2564 2565 2566 2567
      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
2568
        store_param_type((char**) &net->write_pos, param);
2569 2570 2571
    }

    for (param= stmt->params; param < param_end; param++)
2572
    {
2573
      /* check if mysql_stmt_send_long_data() was used */
2574 2575
      if (param->long_data_used)
	param->long_data_used= 0;	/* Clear for next execute call */
2576
      else if (store_param(stmt, param))
2577
	DBUG_RETURN(1);
2578
    }
2579 2580
    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
2581
    if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
2582
    {
2583
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
2584
      DBUG_RETURN(1);
2585
    }
2586
    result= execute(stmt, param_data, length);
venu@myvenu.com's avatar
venu@myvenu.com committed
2587
    stmt->send_types_to_server=0;
2588
    my_free(param_data, MYF(MY_WME));
2589 2590 2591
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
2592 2593
}

2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607
/*
  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)
{
2608
  if (stmt->data_cursor)
2609
  {
2610 2611
    *row= (uchar *) stmt->data_cursor->data;
    stmt->data_cursor= stmt->data_cursor->next;
2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631
    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
2632
                  stmt->last_{errno,error}; *row is not changed
2633
  MYSQL_NO_DATA - end of file was read from network;
2634
                  *row is set to NULL
2635 2636 2637 2638 2639 2640
*/

static int stmt_read_row_unbuffered(MYSQL_STMT *stmt, unsigned char **row)
{
  int rc= 1;
  MYSQL *mysql= stmt->mysql;
2641
  /*
2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652
    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 ?
2653
                   CR_FETCH_CANCELED : CR_COMMANDS_OUT_OF_SYNC,
2654 2655 2656 2657 2658 2659 2660
                   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);
2661 2662 2663 2664 2665 2666 2667
    /*
      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;
2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
    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;
}

2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715

/*
  Fetch statement row using server side cursor.

  SYNOPSIS
    stmt_read_row_from_cursor()

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

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

    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
    /* Send row request to the server */
    int4store(buff, stmt->stmt_id);
2716
    int4store(buff + 4, stmt->prefetch_rows); /* number of rows to fetch */
2717
    if ((*mysql->methods->advanced_command)(mysql, COM_STMT_FETCH,
holyfoot/hf@mysql.com/deer.(none)'s avatar
holyfoot/hf@mysql.com/deer.(none) committed
2718 2719
                                            buff, sizeof(buff), NullS, 0,
                                            1, NULL))
2720 2721 2722 2723
    {
      set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
      return 1;
    }
2724
    if ((*mysql->methods->read_rows_from_cursor)(stmt))
2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735
      return 1;
    stmt->server_status= mysql->server_status;

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


2736 2737 2738 2739 2740 2741 2742 2743
/*
  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)))
2744 2745 2746 2747 2748 2749 2750
{
  return MYSQL_NO_DATA;
}

static int
stmt_read_row_no_result_set(MYSQL_STMT *stmt  __attribute__((unused)),
                      unsigned char **row  __attribute__((unused)))
2751
{
2752 2753
  set_stmt_error(stmt, CR_NO_RESULT_SET, unknown_sqlstate);
  return 1;
2754 2755
}

2756 2757 2758 2759 2760 2761 2762 2763

/*
  Get/set statement attributes

  SYNOPSIS
    mysql_stmt_attr_get()
    mysql_stmt_attr_set()

paul@ice.snake.net's avatar
paul@ice.snake.net committed
2764
    attr_type  statement attribute
2765 2766 2767 2768 2769 2770
    value      casted to const void * pointer to value.

  RETURN VALUE
    0 success
   !0 wrong attribute type
*/
2771

2772 2773 2774 2775 2776 2777 2778 2779
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;
2780
  case STMT_ATTR_CURSOR_TYPE:
2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794
  {
    ulong cursor_type;
    cursor_type= value ? *(ulong*) value : 0UL;
    if (cursor_type > (ulong) CURSOR_TYPE_READ_ONLY)
      goto err_not_implemented;
    stmt->flags= cursor_type;
    break;
  }
  case STMT_ATTR_PREFETCH_ROWS:
  {
    ulong prefetch_rows= value ? *(ulong*) value : DEFAULT_PREFETCH_ROWS;
    if (value == 0)
      return TRUE;
    stmt->prefetch_rows= prefetch_rows;
2795
    break;
2796
  }
2797
  default:
2798
    goto err_not_implemented;
2799 2800
  }
  return FALSE;
2801 2802 2803
err_not_implemented:
  set_stmt_error(stmt, CR_NOT_IMPLEMENTED, unknown_sqlstate);
  return TRUE;
2804 2805 2806
}


2807
my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
2808 2809 2810 2811 2812
                                    enum enum_stmt_attr_type attr_type,
                                    void *value)
{
  switch (attr_type) {
  case STMT_ATTR_UPDATE_MAX_LENGTH:
2813
    *(unsigned long *) value= stmt->update_max_length;
2814
    break;
2815
  case STMT_ATTR_CURSOR_TYPE:
2816
    *(ulong*) value= stmt->flags;
2817
      break;
2818 2819 2820
  case STMT_ATTR_PREFETCH_ROWS:
    *(ulong*) value= stmt->prefetch_rows;
    break;
2821
  default:
2822 2823 2824 2825 2826 2827
    return TRUE;
  }
  return FALSE;
}


hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2828
/*
2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869
  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().
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2870 2871
*/

2872
int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2873
{
2874
  MYSQL *mysql= stmt->mysql;
2875
  DBUG_ENTER("mysql_stmt_execute");
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2876

2877 2878 2879
  if (!mysql)
  {
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2880
    DBUG_RETURN(1);
2881 2882
  }

2883
  if (reset_stmt_handle(stmt, RESET_STORE_RESULT))
2884
    DBUG_RETURN(1);
2885 2886
  /*
    No need to check for stmt->state: if the statement wasn't
paul@ice.snake.net's avatar
paul@ice.snake.net committed
2887
    prepared we'll get 'unknown statement handler' error from server.
2888 2889 2890
  */
  if (mysql->methods->stmt_execute(stmt))
    DBUG_RETURN(1);
2891
  if (mysql->field_count)
2892
  {
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913
    /* 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
2914
        COM_STMT_EXECUTE (even if it is not necessary), so either this or
2915
        previous branch always works.
2916 2917 2918 2919 2920
        TODO: send metadata only when it's really necessary and add a warning
        'Metadata changed' when it's sent twice.
      */
      update_stmt_fields(stmt);
    }
2921 2922 2923 2924
  }
  stmt->state= MYSQL_STMT_EXECUTE_DONE;
  if (stmt->field_count)
  {
2925 2926 2927 2928 2929
    if (stmt->server_status & SERVER_STATUS_CURSOR_EXISTS)
    {
      mysql->status= MYSQL_STATUS_READY;
      stmt->read_row_func= stmt_read_row_from_cursor;
    }
2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940
    else if (stmt->flags & CURSOR_TYPE_READ_ONLY)
    {
      /*
        This is a single-row result set, a result set with no rows, EXPLAIN,
        SHOW VARIABLES, or some other command which either a) bypasses the
        cursors framework in the server and writes rows directly to the
        network or b) is more efficient if all (few) result set rows are
        precached on client and server's resources are freed.
      */
      DBUG_RETURN(mysql_stmt_store_result(stmt));
    }
2941 2942 2943 2944 2945 2946
    else
    {
      stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
      stmt->unbuffered_fetch_cancelled= FALSE;
      stmt->read_row_func= stmt_read_row_unbuffered;
    }
2947
  }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2948 2949 2950
  DBUG_RETURN(0);
}

2951

2952 2953 2954 2955
/*
  Return total parameters count in the statement
*/

2956
ulong STDCALL mysql_stmt_param_count(MYSQL_STMT * stmt)
2957
{
2958
  DBUG_ENTER("mysql_stmt_param_count");
2959 2960 2961
  DBUG_RETURN(stmt->param_count);
}

2962 2963 2964 2965 2966 2967
/*
  Return total affected rows from the last statement
*/

my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
2968
  return stmt->affected_rows;
2969
}
2970

2971

2972 2973 2974 2975 2976 2977 2978 2979 2980 2981
/*
  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;
}

2982
/*
2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995
  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.
2996 2997 2998 2999 3000 3001 3002
*/

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

3003

3004 3005 3006
static my_bool int_is_null_true= 1;		/* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;

3007

3008
/*
3009
  Set up input data buffers for a statement.
3010 3011 3012 3013 3014

  SYNOPSIS
    mysql_stmt_bind_param()
    stmt    statement handle
            The statement must be prepared with mysql_stmt_prepare().
3015
    my_bind Array of mysql_stmt_param_count() bind parameters.
3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030
            This function doesn't check that size of this argument
            is >= mysql_stmt_field_count(): it's user's responsibility.

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

    By properly initializing bind array you can bind virtually any
    C language type to statement's placeholders:
    First, it's strongly recommended to always zero-initialize entire
paul@ice.snake.net's avatar
paul@ice.snake.net committed
3031
    bind structure before setting its members. This will both shorten
3032 3033
    your application code and make it robust to future extensions of
    MYSQL_BIND structure.
3034
    Then you need to assign typecode of your application buffer to
3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089
    MYSQL_BIND::buffer_type. The following typecodes with their
    correspondence to C language types are supported:
    MYSQL_TYPE_TINY       for 8-bit integer variables. Normally it's
                          'signed char' and 'unsigned char';
    MYSQL_TYPE_SHORT      for 16-bit signed and unsigned variables. This
                          is usually 'short' and 'unsigned short';
    MYSQL_TYPE_LONG       for 32-bit signed and unsigned variables. It
                          corresponds to 'int' and 'unsigned int' on
                          vast majority of platforms. On IA-32 and some
                          other 32-bit systems you can also use 'long'
                          here;
    MYSQL_TYPE_LONGLONG   64-bit signed or unsigned integer.  Stands for
                          '[unsigned] long long' on most platforms;
    MYSQL_TYPE_FLOAT      32-bit floating point type, 'float' on most
                          systems;
    MYSQL_TYPE_DOUBLE     64-bit floating point type, 'double' on most
                          systems;
    MYSQL_TYPE_TIME       broken-down time stored in MYSQL_TIME
                          structure
    MYSQL_TYPE_DATE       date stored in MYSQL_TIME structure
    MYSQL_TYPE_DATETIME   datetime stored in MYSQL_TIME structure See
                          more on how to use these types for sending
                          dates and times below;
    MYSQL_TYPE_STRING     character string, assumed to be in
                          character-set-client. If character set of
                          client is not equal to character set of
                          column, value for this placeholder will be
                          converted to destination character set before
                          insert.
    MYSQL_TYPE_BLOB       sequence of bytes. This sequence is assumed to
                          be in binary character set (which is the same
                          as no particular character set), and is never
                          converted to any other character set. See also
                          notes about supplying string/blob length
                          below.
    MYSQL_TYPE_NULL       special typecode for binding nulls.
    These C/C++ types are not supported yet by the API: long double,
    bool.

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

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

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

3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149
    Binding integer types.
      For integer types you might also need to set MYSQL_BIND::is_unsigned
      member. Set it to TRUE when binding unsigned char, unsigned short,
      unsigned int, unsigned long, unsigned long long.

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

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

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

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

    Data conversion.
      If conversion from host language type to data representation,
      corresponding to SQL type, is required it's done on the server.
      Data truncation is possible when conversion is lossy. For
      example, if you supply MYSQL_TYPE_DATETIME value out of valid
      SQL type TIMESTAMP range, the same conversion will be applied as
      if this value would have been sent as string in the old
      protocol.  TODO: document how the server will behave in case of
      truncation/data loss.
3150 3151 3152 3153 3154

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

    See also: mysql_stmt_send_long_data() for sending long text/blob
3155
    data in pieces, examples in tests/mysql_client_test.c.
3156 3157 3158 3159 3160 3161 3162 3163 3164 3165
    Next steps you might want to make:
    - execute statement with mysql_stmt_execute(),
    - reset statement using mysql_stmt_reset() or reprepare it with
      another query using mysql_stmt_prepare()
    - close statement with mysql_stmt_close().

  IMPLEMENTATION
    The function copies given bind array to internal storage of the
    statement, and sets up typecode-specific handlers to perform
    serialization of bound data. This means that although you don't need
3166 3167
    to call this routine after each assignment to bind buffers, you
    need to call it each time you change parameter typecodes, or other
3168 3169 3170
    members of MYSQL_BIND array.
    This is a pure local call. Data types of client buffers are sent
    along with buffers' data at first execution of the statement.
3171 3172 3173 3174

  RETURN
    0  success
    1  error, can be retrieved with mysql_stmt_error.
3175 3176
*/

3177
my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT *stmt, MYSQL_BIND *my_bind)
3178
{
3179 3180
  uint count=0;
  MYSQL_BIND *param, *end;
3181
  DBUG_ENTER("mysql_stmt_bind_param");
3182

3183 3184 3185 3186 3187 3188 3189 3190 3191 3192
  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);
  }

3193
  /* Allocated on prepare */
3194
  memcpy((char*) stmt->params, (char*) my_bind,
3195 3196 3197 3198 3199
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
3200
  {
3201
    param->param_number= count++;
3202 3203
    param->long_data_used= 0;

3204 3205 3206 3207
    /* 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;

3208 3209
    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
venu@myvenu.com's avatar
venu@myvenu.com committed
3210
    case MYSQL_TYPE_NULL:
3211
      param->is_null= &int_is_null_true;
venu@myvenu.com's avatar
venu@myvenu.com committed
3212
      break;
3213
    case MYSQL_TYPE_TINY:
3214
      /* Force param->length as this is fixed for this type */
3215 3216
      param->length= &param->buffer_length;
      param->buffer_length= 1;
3217 3218 3219
      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
3220 3221
      param->length= &param->buffer_length;
      param->buffer_length= 2;
3222 3223 3224
      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
3225 3226
      param->length= &param->buffer_length;
      param->buffer_length= 4;
3227 3228 3229
      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
3230 3231
      param->length= &param->buffer_length;
      param->buffer_length= 8;
3232 3233 3234
      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
3235 3236
      param->length= &param->buffer_length;
      param->buffer_length= 4;
3237 3238 3239
      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
3240 3241
      param->length= &param->buffer_length;
      param->buffer_length= 8;
3242 3243
      param->store_param_func= store_param_double;
      break;
3244 3245
    case MYSQL_TYPE_TIME:
      param->store_param_func= store_param_time;
3246
      param->buffer_length= MAX_TIME_REP_LENGTH;
3247 3248 3249
      break;
    case MYSQL_TYPE_DATE:
      param->store_param_func= store_param_date;
3250
      param->buffer_length= MAX_DATE_REP_LENGTH;
3251 3252 3253 3254
      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->store_param_func= store_param_datetime;
3255
      param->buffer_length= MAX_DATETIME_REP_LENGTH;
3256
      break;
3257 3258 3259
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
venu@myvenu.com's avatar
venu@myvenu.com committed
3260
    case MYSQL_TYPE_BLOB:
3261
    case MYSQL_TYPE_VARCHAR:
3262 3263
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
3264 3265
    case MYSQL_TYPE_DECIMAL:
    case MYSQL_TYPE_NEWDECIMAL:
3266
      param->store_param_func= store_param_str;
3267
      /*
3268 3269
        For variable length types user must set either length or
        buffer_length.
3270
      */
3271 3272
      break;
    default:
3273
      strmov(stmt->sqlstate, unknown_sqlstate);
3274 3275
      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
3276
	      param->buffer_type, count);
3277
      DBUG_RETURN(1);
3278
    }
3279 3280 3281 3282 3283 3284
    /*
      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;
3285
  }
3286
  /* We have to send/resend type information to MySQL */
3287 3288
  stmt->send_types_to_server= TRUE;
  stmt->bind_param_done= TRUE;
3289 3290 3291
  DBUG_RETURN(0);
}

3292

3293 3294 3295 3296 3297
/********************************************************************
 Long data implementation
*********************************************************************/

/*
3298 3299 3300
  Send long data in pieces to the server

  SYNOPSIS
3301
    mysql_stmt_send_long_data()
3302 3303 3304 3305
    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)
3306

3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330
  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.

3331
  RETURN VALUES
3332 3333
    0	ok
    1	error
3334 3335
*/

3336
my_bool STDCALL
3337
mysql_stmt_send_long_data(MYSQL_STMT *stmt, uint param_number,
3338
		     const char *data, ulong length)
3339 3340
{
  MYSQL_BIND *param;
3341
  DBUG_ENTER("mysql_stmt_send_long_data");
3342
  DBUG_ASSERT(stmt != 0);
3343 3344
  DBUG_PRINT("enter",("param no: %d  data: 0x%lx, length : %ld",
		      param_number, (long) data, length));
3345

3346 3347 3348 3349 3350 3351 3352 3353 3354
  /*
    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);
  }
3355

3356
  param= stmt->params+param_number;
3357
  if (!IS_LONGDATA(param->buffer_type))
3358
  {
3359
    /* Long data handling should be used only for string/binary types */
3360
    strmov(stmt->sqlstate, unknown_sqlstate);
3361 3362 3363 3364
    sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	    param->param_number);
    DBUG_RETURN(1);
  }
3365

3366
  /*
3367 3368 3369
    Send long data packet if there is data or we're sending long data
    for the first time.
  */
3370
  if (length || param->long_data_used == 0)
3371
  {
3372
    MYSQL *mysql= stmt->mysql;
3373
    /* Packet header: stmt id (4 bytes), param no (2 bytes) */
3374 3375
    char buff[MYSQL_LONG_DATA_HEADER];

3376 3377
    int4store(buff, stmt->stmt_id);
    int2store(buff + 4, param_number);
3378 3379
    param->long_data_used= 1;

3380 3381 3382 3383
    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
3384 3385
    if ((*mysql->methods->advanced_command)(mysql, COM_STMT_SEND_LONG_DATA,
                                            buff, sizeof(buff), data,
3386
                                            length, 1, NULL))
3387
    {
3388 3389
      set_stmt_errmsg(stmt, mysql->net.last_error,
		      mysql->net.last_errno, mysql->net.sqlstate);
3390 3391 3392 3393 3394 3395
      DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}

3396

3397
/********************************************************************
3398
 Fetch and conversion of result set rows (binary protocol).
3399 3400
*********************************************************************/

3401 3402 3403 3404 3405 3406 3407 3408
/*
  Read date, (time, datetime) value from network buffer and store it
  in MYSQL_TIME structure.

  SYNOPSIS
    read_binary_{date,time,datetime}()
    tm    MYSQL_TIME structure to fill
    pos   pointer to current position in network buffer.
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3409 3410
          These functions increase pos to point to the beginning of the
          next column.
3411 3412 3413 3414 3415 3416

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

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3417
static void read_binary_time(MYSQL_TIME *tm, uchar **pos)
3418
{
3419
  /* net_field_length will set pos to the first byte of data */
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3420 3421 3422
  uint length= net_field_length(pos);

  if (length)
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3423 3424 3425
  {
    uchar *to= *pos;
    tm->neg= (bool) to[0];
3426

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3427 3428 3429 3430 3431 3432
    tm->day=    (ulong) sint4korr(to+1);
    tm->hour=   (uint) to[5];
    tm->minute= (uint) to[6];
    tm->second= (uint) to[7];
    tm->second_part= (length > 8) ? (ulong) sint4korr(to+8) : 0;
    tm->year= tm->month= 0;
3433 3434 3435 3436 3437 3438
    if (tm->day)
    {
      /* Convert days to hours at once */
      tm->hour+= tm->day*24;
      tm->day= 0;
    }
3439 3440
    tm->time_type= MYSQL_TIMESTAMP_TIME;

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3441
    *pos+= length;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3442
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3443
  else
3444
    set_zero_time(tm, MYSQL_TIMESTAMP_TIME);
3445 3446
}

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3447
static void read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
3448
{
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3449
  uint length= net_field_length(pos);
3450

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3451
  if (length)
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3452 3453
  {
    uchar *to= *pos;
3454

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3455 3456 3457 3458
    tm->neg=    0;
    tm->year=   (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day=    (uint) to[3];
3459

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3460 3461 3462 3463 3464 3465 3466 3467 3468
    if (length > 4)
    {
      tm->hour=   (uint) to[4];
      tm->minute= (uint) to[5];
      tm->second= (uint) to[6];
    }
    else
      tm->hour= tm->minute= tm->second= 0;
    tm->second_part= (length > 7) ? (ulong) sint4korr(to+7) : 0;
3469
    tm->time_type= MYSQL_TIMESTAMP_DATETIME;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3470 3471

    *pos+= length;
3472
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3473
  else
3474
    set_zero_time(tm, MYSQL_TIMESTAMP_DATETIME);
3475 3476
}

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3477
static void read_binary_date(MYSQL_TIME *tm, uchar **pos)
3478
{
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3479
  uint length= net_field_length(pos);
3480

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3481
  if (length)
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3482 3483 3484 3485 3486
  {
    uchar *to= *pos;
    tm->year =  (uint) sint2korr(to);
    tm->month=  (uint) to[2];
    tm->day= (uint) to[3];
3487

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3488 3489 3490
    tm->hour= tm->minute= tm->second= 0;
    tm->second_part= 0;
    tm->neg= 0;
3491
    tm->time_type= MYSQL_TIMESTAMP_DATE;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3492 3493

    *pos+= length;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3494
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3495
  else
3496
    set_zero_time(tm, MYSQL_TIMESTAMP_DATE);
3497 3498
}

3499

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3500 3501 3502 3503 3504 3505 3506 3507 3508
/*
  Convert string to supplied buffer of any type.

  SYNOPSIS
    fetch_string_with_conversion()
    param   output buffer descriptor
    value   column data
    length  data length
*/
3509

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3510 3511
static void fetch_string_with_conversion(MYSQL_BIND *param, char *value,
                                         uint length)
3512
{
3513
  char *buffer= (char *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3514
  int err= 0;
3515
  char *endptr= value + length;
3516

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3517 3518 3519 3520
  /*
    This function should support all target buffer types: the rest
    of conversion functions can delegate conversion to it.
  */
3521
  switch (param->buffer_type) {
3522 3523
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3524
  case MYSQL_TYPE_TINY:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3525
  {
3526
    longlong data= my_strtoll10(value, &endptr, &err);
3527
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3528
                                 INT_MIN8, INT_MAX8, UINT_MAX8) || err > 0);
3529
    *buffer= (uchar) data;
3530
    break;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3531
  }
3532
  case MYSQL_TYPE_SHORT:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3533
  {
3534
    longlong data= my_strtoll10(value, &endptr, &err);
3535
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3536
                                 INT_MIN16, INT_MAX16, UINT_MAX16) || err > 0);
3537
    shortstore(buffer, (short) data);
3538
    break;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3539
  }
3540
  case MYSQL_TYPE_LONG:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3541
  {
3542
    longlong data= my_strtoll10(value, &endptr, &err);
3543
    *param->error= (IS_TRUNCATED(data, param->is_unsigned,
3544
                                 INT_MIN32, INT_MAX32, UINT_MAX32) || err > 0);
3545
    longstore(buffer, (int32) data);
3546
    break;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3547
  }
3548
  case MYSQL_TYPE_LONGLONG:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3549
  {
3550 3551 3552
    longlong data= my_strtoll10(value, &endptr, &err);
    *param->error= param->is_unsigned ? err != 0 :
                                       (err > 0 || (err == 0 && data < 0));
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3553
    longlongstore(buffer, data);
3554
    break;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3555
  }
3556
  case MYSQL_TYPE_FLOAT:
3557
  {
3558 3559 3560 3561
    double data= my_strntod(&my_charset_latin1, value, length, &endptr, &err);
    float fdata= (float) data;
    *param->error= (fdata != data) | test(err);
    floatstore(buffer, fdata);
3562 3563
    break;
  }
3564
  case MYSQL_TYPE_DOUBLE:
3565
  {
3566 3567
    double data= my_strntod(&my_charset_latin1, value, length, &endptr, &err);
    *param->error= test(err);
3568
    doublestore(buffer, data);
3569 3570
    break;
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3571 3572 3573 3574
  case MYSQL_TYPE_TIME:
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
    str_to_time(value, length, tm, &err);
3575
    *param->error= test(err);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3576 3577 3578 3579
    break;
  }
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_DATETIME:
3580
  case MYSQL_TYPE_TIMESTAMP:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3581 3582
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)buffer;
3583
    (void) str_to_datetime(value, length, tm, TIME_FUZZY_DATE, &err);
3584 3585
    *param->error= test(err) && (param->buffer_type == MYSQL_TYPE_DATE &&
                                 tm->time_type != MYSQL_TIMESTAMP_DATE);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3586 3587 3588 3589 3590 3591
    break;
  }
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
3592 3593
  case MYSQL_TYPE_DECIMAL:
  case MYSQL_TYPE_NEWDECIMAL:
3594
  default:
3595
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609
    /*
      Copy column data to the buffer taking into account offset,
      data length and buffer length.
    */
    char *start= value + param->offset;
    char *end= value + length;
    ulong copy_length;
    if (start < end)
    {
      copy_length= end - start;
      /* We've got some data beyond offset: copy up to buffer_length bytes */
      if (param->buffer_length)
        memcpy(buffer, start, min(copy_length, param->buffer_length));
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3610
    else
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3611 3612 3613
      copy_length= 0;
    if (copy_length < param->buffer_length)
      buffer[copy_length]= '\0';
3614
    *param->error= copy_length > param->buffer_length;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3615 3616 3617 3618
    /*
      param->length will always contain length of entire column;
      number of copied bytes may be way different:
    */
3619
    *param->length= length;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3620
    break;
3621
  }
3622
  }
3623 3624
}

3625

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3626 3627
/*
  Convert integer value to client buffer of any type.
3628

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3629 3630 3631 3632 3633 3634
  SYNOPSIS
    fetch_long_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
*/
3635

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3636
static void fetch_long_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
3637
                                       longlong value, my_bool is_unsigned)
3638
{
3639
  char *buffer= (char *)param->buffer;
3640

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3641
  switch (param->buffer_type) {
3642 3643
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3644
  case MYSQL_TYPE_TINY:
3645
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3646
                                INT_MIN8, INT_MAX8, UINT_MAX8);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3647
    *(uchar *)param->buffer= (uchar) value;
3648 3649
    break;
  case MYSQL_TYPE_SHORT:
3650
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3651
                                INT_MIN16, INT_MAX16, UINT_MAX16);
3652
    shortstore(buffer, (short) value);
3653 3654
    break;
  case MYSQL_TYPE_LONG:
3655
    *param->error= IS_TRUNCATED(value, param->is_unsigned,
3656
                                INT_MIN32, INT_MAX32, UINT_MAX32);
3657
    longstore(buffer, (int32) value);
3658 3659
    break;
  case MYSQL_TYPE_LONGLONG:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3660
    longlongstore(buffer, value);
3661
    *param->error= param->is_unsigned != is_unsigned && value < 0;
3662 3663
    break;
  case MYSQL_TYPE_FLOAT:
3664
  {
3665
    /*
3666
      We need to mark the local variable volatile to
3667 3668 3669
      workaround Intel FPU executive precision feature.
      (See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
    */
3670
    volatile float data;
3671
    if (is_unsigned)
3672
    {
3673
      data= (float) ulonglong2double(value);
3674 3675
      *param->error= ((ulonglong) value) != ((ulonglong) data);
    }
3676
    else
3677 3678 3679 3680
    {
      data= (float)value;
      *param->error= value != ((longlong) data);
    }
3681
    floatstore(buffer, data);
3682 3683
    break;
  }
3684
  case MYSQL_TYPE_DOUBLE:
3685
  {
3686
    volatile double data;
3687
    if (is_unsigned)
3688
    {
3689
      data= ulonglong2double(value);
3690 3691
      *param->error= ((ulonglong) value) != ((ulonglong) data);
    }
3692
    else
3693
    {
3694
      data= (double)value;
3695 3696
      *param->error= value != ((longlong) data);
    }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3697
    doublestore(buffer, data);
3698 3699
    break;
  }
3700 3701 3702 3703 3704 3705
  case MYSQL_TYPE_TIME:
  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_TIMESTAMP:
  case MYSQL_TYPE_DATETIME:
  {
    int error;
3706 3707
    value= number_to_datetime(value, (MYSQL_TIME *) buffer, TIME_FUZZY_DATE,
                              &error);
3708 3709 3710
    *param->error= test(error);
    break;
  }
3711
  default:
3712
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3713
    char buff[22];                              /* Enough for longlong */
3714
    char *end= longlong10_to_str(value, buff, is_unsigned ? 10: -10);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3715
    /* Resort to string conversion which supports all typecodes */
3716 3717 3718 3719 3720 3721 3722 3723 3724 3725
    uint length= (uint) (end-buff);

    if (field->flags & ZEROFILL_FLAG && length < field->length &&
        field->length < 21)
    {
      bmove_upp((char*) buff+field->length,buff+length, length);
      bfill((char*) buff, field->length - length,'0');
      length= field->length;
    }
    fetch_string_with_conversion(param, buff, length);
kent@mysql.com's avatar
kent@mysql.com committed
3726
    break;
3727
  }
3728
  }
3729 3730
}

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741
/*
  Convert double/float column to supplied buffer of any type.

  SYNOPSIS
    fetch_float_with_conversion()
    param   output buffer descriptor
    field   column metadata
    value   column data
    width   default number of significant digits used when converting
            float/double to string
*/
3742

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3743 3744
static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                        double value, int width)
3745
{
3746
  char *buffer= (char *)param->buffer;
3747
  double val64 = (value < 0 ? -floor(-value) : floor(value));
3748

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3749
  switch (param->buffer_type) {
3750 3751
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3752
  case MYSQL_TYPE_TINY:
3753 3754 3755 3756 3757 3758
    /*
      We need to _store_ data in the buffer before the truncation check to
      workaround Intel FPU executive precision feature.
      (See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 for details)
      Sic: AFAIU it does not guarantee to work.
    */
3759
    if (param->is_unsigned)
3760
      *buffer= (uint8) value;
3761
    else
3762
      *buffer= (int8) value;
3763 3764
    *param->error= val64 != (param->is_unsigned ? (double)((uint8) *buffer) :
                                                  (double)((int8) *buffer));
3765 3766
    break;
  case MYSQL_TYPE_SHORT:
3767 3768 3769 3770 3771 3772 3773 3774 3775 3776
    if (param->is_unsigned)
    {
      ushort data= (ushort) value;
      shortstore(buffer, data);
    }
    else
    {
      short data= (short) value;
      shortstore(buffer, data);
    }
3777
    *param->error= val64 != (param->is_unsigned ? (double) (*(ushort*) buffer):
3778
                                                  (double) (*(short*) buffer));
3779 3780
    break;
  case MYSQL_TYPE_LONG:
3781 3782 3783 3784 3785 3786 3787 3788 3789 3790
    if (param->is_unsigned)
    {
      uint32 data= (uint32) value;
      longstore(buffer, data);
    }
    else
    {
      int32 data= (int32) value;
      longstore(buffer, data);
    }
3791
    *param->error= val64 != (param->is_unsigned ? (double) (*(uint32*) buffer):
3792 3793
                                                  (double) (*(int32*) buffer));
      break;
3794
  case MYSQL_TYPE_LONGLONG:
3795 3796 3797 3798 3799 3800 3801 3802 3803 3804
    if (param->is_unsigned)
    {
      ulonglong data= (ulonglong) value;
      longlongstore(buffer, data);
    }
    else
    {
      longlong data= (longlong) value;
      longlongstore(buffer, data);
    }
3805
    *param->error= val64 != (param->is_unsigned ?
3806
                             ulonglong2double(*(ulonglong*) buffer) :
3807
                             (double) (*(longlong*) buffer));
3808 3809 3810
    break;
  case MYSQL_TYPE_FLOAT:
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3811
    float data= (float) value;
3812
    floatstore(buffer, data);
3813
    *param->error= (*(float*) buffer) != value;
3814 3815 3816 3817
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3818
    doublestore(buffer, value);
3819 3820
    break;
  }
3821
  default:
3822
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3823 3824 3825 3826 3827
    /*
      Resort to fetch_string_with_conversion: this should handle
      floating point -> string conversion nicely, honor all typecodes
      and param->offset possibly set in mysql_stmt_fetch_column
    */
3828
    char buff[MAX_DOUBLE_STRING_REP_LENGTH];
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3829 3830 3831
    char *end;
    /* TODO: move this to a header shared between client and server. */
#define NOT_FIXED_DEC  31
3832
    if (field->decimals >= NOT_FIXED_DEC)
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3833 3834
#undef NOT_FIXED_DEC
    {
3835 3836 3837 3838 3839 3840 3841 3842
      /*
        The 14 below is to ensure that the server and client has the same
        precisions. This will ensure that on the same machine you get the
        same value as a string independent of the protocol you use.
      */
      sprintf(buff, "%-*.*g", (int) min(sizeof(buff)-1,
                                        param->buffer_length),
	      min(14,width), value);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3843 3844 3845
      end= strcend(buff, ' ');
      *end= 0;
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3846
    else
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3847
    {
kent@mysql.com's avatar
kent@mysql.com committed
3848
      sprintf(buff, "%.*f", (int) field->decimals, value);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3849 3850
      end= strend(buff);
    }
monty@mysql.com's avatar
monty@mysql.com committed
3851
    fetch_string_with_conversion(param, buff, (uint) (end - buff));
3852 3853
    break;
  }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3854
  }
3855 3856
}

3857

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3858 3859 3860 3861 3862 3863 3864 3865 3866
/*
  Fetch time/date/datetime to supplied buffer of any type

  SYNOPSIS
    param   output buffer descriptor
    time    column data
*/

static void fetch_datetime_with_conversion(MYSQL_BIND *param,
3867
                                           MYSQL_FIELD *field,
3868
                                           MYSQL_TIME *my_time)
3869 3870
{
  switch (param->buffer_type) {
3871 3872
  case MYSQL_TYPE_NULL: /* do nothing */
    break;
3873
  case MYSQL_TYPE_DATE:
3874 3875
    *(MYSQL_TIME *)(param->buffer)= *my_time;
    *param->error= my_time->time_type != MYSQL_TIMESTAMP_DATE;
3876
    break;
3877
  case MYSQL_TYPE_TIME:
3878 3879
    *(MYSQL_TIME *)(param->buffer)= *my_time;
    *param->error= my_time->time_type != MYSQL_TIMESTAMP_TIME;
3880
    break;
3881 3882
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
3883
    *(MYSQL_TIME *)(param->buffer)= *my_time;
3884
    /* No error: time and date are compatible with datetime */
3885
    break;
3886
  case MYSQL_TYPE_YEAR:
3887
    shortstore(param->buffer, my_time->year);
3888 3889 3890 3891 3892
    *param->error= 1;
    break;
  case MYSQL_TYPE_FLOAT:
  case MYSQL_TYPE_DOUBLE:
  {
3893
    ulonglong value= TIME_to_ulonglong(my_time);
3894 3895 3896
    fetch_float_with_conversion(param, field,
                                ulonglong2double(value), DBL_DIG);
    break;
3897 3898 3899 3900 3901 3902 3903
  }
  case MYSQL_TYPE_TINY:
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_INT24:
  case MYSQL_TYPE_LONG:
  case MYSQL_TYPE_LONGLONG:
  {
3904
    longlong value= (longlong) TIME_to_ulonglong(my_time);
3905
    fetch_long_with_conversion(param, field, value, TRUE);
3906
    break;
3907
  }
3908 3909
  default:
  {
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3910 3911 3912 3913
    /*
      Convert time value  to string and delegate the rest to
      fetch_string_with_conversion:
    */
3914
    char buff[MAX_DATE_STRING_REP_LENGTH];
3915
    uint length= my_TIME_to_str(my_time, buff);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3916 3917 3918
    /* Resort to string conversion */
    fetch_string_with_conversion(param, (char *)buff, length);
    break;
3919 3920 3921
  }
  }
}
3922

3923

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938
/*
  Fetch and convert result set column to output buffer.

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

  DESCRIPTION
    This is a fallback implementation of column fetch used
    if column and output buffer types do not match.
    Increases tuple pointer to point at the next column within the
    tuple.
*/
3939

konstantin@mysql.com's avatar
konstantin@mysql.com committed
3940 3941
static void fetch_result_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
                                         uchar **row)
3942
{
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3943
  enum enum_field_types field_type= field->type;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3944
  uint field_is_unsigned= field->flags & UNSIGNED_FLAG;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3945

3946 3947 3948
  switch (field_type) {
  case MYSQL_TYPE_TINY:
  {
3949 3950 3951 3952
    uchar value= **row;
    /* sic: we need to cast to 'signed char' as 'char' may be unsigned */
    longlong data= field_is_unsigned ? (longlong) value :
                                       (longlong) (signed char) value;
3953
    fetch_long_with_conversion(param, field, data, 0);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3954
    *row+= 1;
3955 3956 3957 3958 3959
    break;
  }
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
  {
3960
    short value= sint2korr(*row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3961 3962
    longlong data= field_is_unsigned ? (longlong) (unsigned short) value :
                                       (longlong) value;
3963
    fetch_long_with_conversion(param, field, data, 0);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3964
    *row+= 2;
3965 3966
    break;
  }
3967
  case MYSQL_TYPE_INT24: /* mediumint is sent as 4 bytes int */
3968 3969
  case MYSQL_TYPE_LONG:
  {
3970 3971
    int32 value= sint4korr(*row);
    longlong data= field_is_unsigned ? (longlong) (uint32) value :
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3972
                                       (longlong) value;
3973
    fetch_long_with_conversion(param, field, data, 0);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3974
    *row+= 4;
3975 3976 3977 3978 3979
    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
    longlong value= (longlong)sint8korr(*row);
3980 3981
    fetch_long_with_conversion(param, field, value,
                               field->flags & UNSIGNED_FLAG);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3982
    *row+= 8;
3983 3984 3985 3986 3987 3988
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
    float value;
    float4get(value,*row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3989
    fetch_float_with_conversion(param, field, value, FLT_DIG);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3990
    *row+= 4;
3991 3992 3993 3994 3995 3996
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
    double value;
    float8get(value,*row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3997
    fetch_float_with_conversion(param, field, value, DBL_DIG);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
3998
    *row+= 8;
3999 4000 4001 4002
    break;
  }
  case MYSQL_TYPE_DATE:
  {
4003
    MYSQL_TIME tm;
4004

konstantin@mysql.com's avatar
konstantin@mysql.com committed
4005
    read_binary_date(&tm, row);
4006
    fetch_datetime_with_conversion(param, field, &tm);
4007 4008 4009 4010
    break;
  }
  case MYSQL_TYPE_TIME:
  {
4011
    MYSQL_TIME tm;
4012

konstantin@mysql.com's avatar
konstantin@mysql.com committed
4013
    read_binary_time(&tm, row);
4014
    fetch_datetime_with_conversion(param, field, &tm);
4015 4016 4017 4018 4019 4020
    break;
  }
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME tm;
4021

konstantin@mysql.com's avatar
konstantin@mysql.com committed
4022
    read_binary_datetime(&tm, row);
4023
    fetch_datetime_with_conversion(param, field, &tm);
4024 4025
    break;
  }
4026
  default:
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4027 4028
  {
    ulong length= net_field_length(row);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4029
    fetch_string_with_conversion(param, (char*) *row, length);
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4030
    *row+= length;
4031 4032
    break;
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4033
  }
4034 4035
}

4036

4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055
/*
  Functions to fetch data to application buffers without conversion.

  All functions have the following characteristics:

  SYNOPSIS
    fetch_result_xxx()
    param   MySQL bind param
    pos     Row value

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

  RETURN
    none
*/

4056 4057
static void fetch_result_tinyint(MYSQL_BIND *param, MYSQL_FIELD *field,
                                 uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4058
{
4059 4060 4061
  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  uchar data= **row;
  *(uchar *)param->buffer= data;
4062
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX8;
4063
  (*row)++;
venu@myvenu.com's avatar
venu@myvenu.com committed
4064 4065
}

4066 4067
static void fetch_result_short(MYSQL_BIND *param, MYSQL_FIELD *field,
                               uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4068
{
4069 4070 4071
  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  ushort data= (ushort) sint2korr(*row);
  shortstore(param->buffer, data);
4072
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX16;
4073
  *row+= 2;
venu@myvenu.com's avatar
venu@myvenu.com committed
4074 4075
}

4076 4077 4078
static void fetch_result_int32(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4079
{
4080 4081 4082
  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  uint32 data= (uint32) sint4korr(*row);
  longstore(param->buffer, data);
4083
  *param->error= param->is_unsigned != field_is_unsigned && data > INT_MAX32;
4084
  *row+= 4;
venu@myvenu.com's avatar
venu@myvenu.com committed
4085 4086
}

4087 4088 4089
static void fetch_result_int64(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
4090
{
4091 4092
  my_bool field_is_unsigned= test(field->flags & UNSIGNED_FLAG);
  ulonglong data= (ulonglong) sint8korr(*row);
4093
  *param->error= param->is_unsigned != field_is_unsigned && data > LONGLONG_MAX;
4094
  longlongstore(param->buffer, data);
4095
  *row+= 8;
venu@myvenu.com's avatar
venu@myvenu.com committed
4096 4097
}

4098 4099 4100
static void fetch_result_float(MYSQL_BIND *param,
                               MYSQL_FIELD *field __attribute__((unused)),
                               uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4101 4102 4103
{
  float value;
  float4get(value,*row);
4104
  floatstore(param->buffer, value);
4105
  *row+= 4;
venu@myvenu.com's avatar
venu@myvenu.com committed
4106 4107
}

4108 4109 4110
static void fetch_result_double(MYSQL_BIND *param,
                                MYSQL_FIELD *field __attribute__((unused)),
                                uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4111 4112 4113
{
  double value;
  float8get(value,*row);
4114
  doublestore(param->buffer, value);
4115
  *row+= 8;
venu@myvenu.com's avatar
venu@myvenu.com committed
4116 4117
}

4118 4119 4120
static void fetch_result_time(MYSQL_BIND *param,
                              MYSQL_FIELD *field __attribute__((unused)),
                              uchar **row)
4121 4122
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4123
  read_binary_time(tm, row);
4124 4125
}

4126 4127 4128
static void fetch_result_date(MYSQL_BIND *param,
                              MYSQL_FIELD *field __attribute__((unused)),
                              uchar **row)
4129 4130
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4131
  read_binary_date(tm, row);
4132 4133
}

4134 4135 4136
static void fetch_result_datetime(MYSQL_BIND *param,
                                  MYSQL_FIELD *field __attribute__((unused)),
                                  uchar **row)
4137 4138
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
konstantin@mysql.com's avatar
konstantin@mysql.com committed
4139
  read_binary_datetime(tm, row);
4140 4141
}

4142 4143 4144
static void fetch_result_bin(MYSQL_BIND *param,
                             MYSQL_FIELD *field __attribute__((unused)),
                             uchar **row)
4145
{
4146 4147 4148
  ulong length= net_field_length(row);
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
4149
  *param->length= length;
4150
  *param->error= copy_length < length;
4151 4152
  *row+= length;
}
4153

4154 4155 4156
static void fetch_result_str(MYSQL_BIND *param,
                             MYSQL_FIELD *field __attribute__((unused)),
                             uchar **row)
venu@myvenu.com's avatar
venu@myvenu.com committed
4157 4158
{
  ulong length= net_field_length(row);
4159 4160
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
4161 4162
  /* Add an end null if there is room in the buffer */
  if (copy_length != param->buffer_length)
4163
    ((uchar *)param->buffer)[copy_length]= '\0';
4164
  *param->length= length;			/* return total length */
4165
  *param->error= copy_length < length;
4166
  *row+= length;
venu@myvenu.com's avatar
venu@myvenu.com committed
4167 4168
}

4169

4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205
/*
  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;
}


4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223
/*
  Check that two field types are binary compatible i. e.
  have equal representation in the binary protocol and
  require client-side buffers of the same type.

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

  RETURN
    TRUE or FALSE
*/

static my_bool is_binary_compatible(enum enum_field_types type1,
                                    enum enum_field_types type2)
{
  static const enum enum_field_types
4224 4225 4226
    range1[]= { MYSQL_TYPE_SHORT, MYSQL_TYPE_YEAR, MYSQL_TYPE_NULL },
    range2[]= { MYSQL_TYPE_INT24, MYSQL_TYPE_LONG, MYSQL_TYPE_NULL },
    range3[]= { MYSQL_TYPE_DATETIME, MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_NULL },
4227 4228 4229
    range4[]= { MYSQL_TYPE_ENUM, MYSQL_TYPE_SET, MYSQL_TYPE_TINY_BLOB,
                MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_LONG_BLOB, MYSQL_TYPE_BLOB,
                MYSQL_TYPE_VAR_STRING, MYSQL_TYPE_STRING, MYSQL_TYPE_GEOMETRY,
4230 4231
                MYSQL_TYPE_DECIMAL, MYSQL_TYPE_NULL };
  static const enum enum_field_types
4232 4233
   *range_list[]= { range1, range2, range3, range4 },
   **range_list_end= range_list + sizeof(range_list)/sizeof(*range_list);
4234
   const enum enum_field_types **range, *type;
4235 4236 4237 4238 4239 4240 4241

  if (type1 == type2)
    return TRUE;
  for (range= range_list; range != range_list_end; ++range)
  {
    /* check that both type1 and type2 are in the same range */
    bool type1_found= FALSE, type2_found= FALSE;
4242
    for (type= *range; *type != MYSQL_TYPE_NULL; type++)
4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280
    {
      type1_found|= type1 == *type;
      type2_found|= type2 == *type;
    }
    if (type1_found || type2_found)
      return type1_found && type2_found;
  }
  return FALSE;
}


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

  SYNOPSIS
    setup_one_fetch_function()
    param    output buffer descriptor
    field    column descriptor

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

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

static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
{
4281 4282
  DBUG_ENTER("setup_one_fetch_function");

4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334
  /* Setup data copy functions for the different supported types */
  switch (param->buffer_type) {
  case MYSQL_TYPE_NULL: /* for dummy binds */
    /*
      It's not binary compatible with anything the server can return:
      no need to setup fetch_result, as it'll be reset anyway
    */
    *param->length= 0;
    break;
  case MYSQL_TYPE_TINY:
    param->fetch_result= fetch_result_tinyint;
    *param->length= 1;
    break;
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
    param->fetch_result= fetch_result_short;
    *param->length= 2;
    break;
  case MYSQL_TYPE_INT24:
  case MYSQL_TYPE_LONG:
    param->fetch_result= fetch_result_int32;
    *param->length= 4;
    break;
  case MYSQL_TYPE_LONGLONG:
    param->fetch_result= fetch_result_int64;
    *param->length= 8;
    break;
  case MYSQL_TYPE_FLOAT:
    param->fetch_result= fetch_result_float;
    *param->length= 4;
    break;
  case MYSQL_TYPE_DOUBLE:
    param->fetch_result= fetch_result_double;
    *param->length= 8;
    break;
  case MYSQL_TYPE_TIME:
    param->fetch_result= fetch_result_time;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_DATE:
    param->fetch_result= fetch_result_date;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
    param->fetch_result= fetch_result_datetime;
    *param->length= sizeof(MYSQL_TIME);
    break;
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
ramil@mysql.com's avatar
ramil@mysql.com committed
4335
  case MYSQL_TYPE_BIT:
4336 4337 4338 4339 4340
    DBUG_ASSERT(param->buffer_length != 0);
    param->fetch_result= fetch_result_bin;
    break;
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
4341 4342
  case MYSQL_TYPE_DECIMAL:
  case MYSQL_TYPE_NEWDECIMAL:
4343 4344 4345 4346
    DBUG_ASSERT(param->buffer_length != 0);
    param->fetch_result= fetch_result_str;
    break;
  default:
4347 4348 4349
    DBUG_PRINT("error", ("Unknown param->buffer_type: %u",
                         (uint) param->buffer_type));
    DBUG_RETURN(TRUE);
4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403
  }
  if (! is_binary_compatible(param->buffer_type, field->type))
    param->fetch_result= fetch_result_with_conversion;

  /* Setup skip_result functions (to calculate max_length) */
  param->skip_result= skip_result_fixed;
  switch (field->type) {
  case MYSQL_TYPE_NULL: /* for dummy binds */
    param->pack_length= 0;
    field->max_length= 0;
    break;
  case MYSQL_TYPE_TINY:
    param->pack_length= 1;
    field->max_length= 4;                     /* as in '-127' */
    break;
  case MYSQL_TYPE_YEAR:
  case MYSQL_TYPE_SHORT:
    param->pack_length= 2;
    field->max_length= 6;                     /* as in '-32767' */
    break;
  case MYSQL_TYPE_INT24:
    field->max_length= 9;  /* as in '16777216' or in '-8388607' */
    param->pack_length= 4;
    break;
  case MYSQL_TYPE_LONG:
    field->max_length= 11;                    /* '-2147483647' */
    param->pack_length= 4;
    break;
  case MYSQL_TYPE_LONGLONG:
    field->max_length= 21;                    /* '18446744073709551616' */
    param->pack_length= 8;
    break;
  case MYSQL_TYPE_FLOAT:
    param->pack_length= 4;
    field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_DOUBLE:
    param->pack_length= 8;
    field->max_length= MAX_DOUBLE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_TIME:
    field->max_length= 15;                    /* 19:23:48.123456 */
    param->skip_result= skip_result_with_length;
  case MYSQL_TYPE_DATE:
    field->max_length= 10;                    /* 2003-11-11 */
    param->skip_result= skip_result_with_length;
    break;
    break;
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
    param->skip_result= skip_result_with_length;
    field->max_length= MAX_DATE_STRING_REP_LENGTH;
    break;
  case MYSQL_TYPE_DECIMAL:
4404
  case MYSQL_TYPE_NEWDECIMAL:
4405 4406 4407 4408 4409 4410 4411 4412 4413
  case MYSQL_TYPE_ENUM:
  case MYSQL_TYPE_SET:
  case MYSQL_TYPE_GEOMETRY:
  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
  case MYSQL_TYPE_VAR_STRING:
  case MYSQL_TYPE_STRING:
ramil@mysql.com's avatar
ramil@mysql.com committed
4414
  case MYSQL_TYPE_BIT:
4415 4416 4417
    param->skip_result= skip_result_string;
    break;
  default:
4418 4419
    DBUG_PRINT("error", ("Unknown field->type: %u", (uint) field->type));
    DBUG_RETURN(TRUE);
4420
  }
4421
  DBUG_RETURN(FALSE);
4422 4423 4424
}


4425
/*
4426
  Setup the bind buffers for resultset processing
4427 4428
*/

4429
my_bool STDCALL mysql_stmt_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *my_bind)
4430
{
4431
  MYSQL_BIND *param, *end;
4432
  MYSQL_FIELD *field;
4433
  ulong       bind_count= stmt->field_count;
4434
  uint        param_count= 0;
4435
  DBUG_ENTER("mysql_stmt_bind_result");
4436
  DBUG_PRINT("enter",("field_count: %lu", bind_count));
4437

4438
  if (!bind_count)
4439
  {
4440 4441 4442 4443
    int errorcode= (int) stmt->state < (int) MYSQL_STMT_PREPARE_DONE ?
                   CR_NO_PREPARE_STMT : CR_NO_STMT_METADATA;
    set_stmt_error(stmt, errorcode, unknown_sqlstate);
    DBUG_RETURN(1);
4444 4445 4446 4447 4448
  }

  /*
    We only need to check that stmt->field_count - if it is not null
    stmt->bind was initialized in mysql_stmt_prepare
4449 4450 4451
    stmt->bind overlaps with bind if mysql_stmt_bind_param
    is called from mysql_stmt_store_result.
  */
4452

4453 4454 4455
  if (stmt->bind != my_bind)
    memcpy((char*) stmt->bind, (char*) my_bind,
           sizeof(MYSQL_BIND) * bind_count);
4456

4457 4458 4459
  for (param= stmt->bind, end= param + bind_count, field= stmt->fields ;
       param < end ;
       param++, field++)
4460
  {
4461 4462
    DBUG_PRINT("info",("buffer_type: %u  field_type: %u",
                       (uint) param->buffer_type, (uint) field->type));
4463 4464
    /*
      Set param->is_null to point to a dummy variable if it's not set.
4465
      This is to make the execute code easier
4466 4467
    */
    if (!param->is_null)
4468
      param->is_null= &param->is_null_value;
4469

4470
    if (!param->length)
4471 4472 4473 4474
      param->length= &param->length_value;

    if (!param->error)
      param->error= &param->error_value;
4475

4476
    param->param_number= param_count++;
4477 4478
    param->offset= 0;

4479 4480
    if (setup_one_fetch_function(param, field))
    {
4481 4482
      strmov(stmt->sqlstate, unknown_sqlstate);
      sprintf(stmt->last_error,
4483 4484
              ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
              field->type, param_count);
4485 4486
      DBUG_RETURN(1);
    }
4487
  }
4488 4489 4490 4491
  stmt->bind_result_done= BIND_RESULT_DONE;
  if (stmt->mysql->options.report_data_truncation)
    stmt->bind_result_done|= REPORT_DATA_TRUNCATION;

4492 4493 4494
  DBUG_RETURN(0);
}

4495

4496
/*
4497
  Fetch row data to bind buffers
4498 4499
*/

4500
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
4501
{
4502
  MYSQL_BIND  *my_bind, *end;
4503
  MYSQL_FIELD *field;
4504
  uchar *null_ptr, bit;
4505
  int truncation_count= 0;
4506 4507 4508 4509 4510 4511
  /*
    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);
4512

4513 4514 4515
  if (!stmt->bind_result_done)
  {
    /* If output parameters were not bound we should just return success */
4516
    return 0;
4517
  }
4518 4519

  null_ptr= row;
4520 4521
  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */
4522

venu@myvenu.com's avatar
venu@myvenu.com committed
4523
  /* Copy complete row to application buffers */
4524 4525 4526 4527
  for (my_bind= stmt->bind, end= my_bind + stmt->field_count,
         field= stmt->fields ;
       my_bind < end ;
       my_bind++, field++)
4528
  {
4529
    *my_bind->error= 0;
4530
    if (*null_ptr & bit)
4531 4532
    {
      /*
4533
        We should set both row_ptr and is_null to be able to see
4534 4535 4536 4537 4538
        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.
      */
4539 4540
      my_bind->row_ptr= NULL;
      *my_bind->is_null= 1;
4541
    }
4542
    else
4543
    {
4544 4545 4546 4547
      *my_bind->is_null= 0;
      my_bind->row_ptr= row;
      (*my_bind->fetch_result)(my_bind, field, &row);
      truncation_count+= *my_bind->error;
4548
    }
4549
    if (!((bit<<=1) & 255))
4550
    {
4551
      bit= 1;					/* To next byte */
4552
      null_ptr++;
4553 4554
    }
  }
4555 4556
  if (truncation_count && (stmt->bind_result_done & REPORT_DATA_TRUNCATION))
    return MYSQL_DATA_TRUNCATED;
4557 4558 4559
  return 0;
}

4560

4561
int cli_unbuffered_fetch(MYSQL *mysql, char **row)
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4562
{
4563
  if (packet_error == cli_safe_read(mysql))
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4564 4565
    return 1;

4566 4567
  *row= ((mysql->net.read_pos[0] == 254) ? NULL :
	 (char*) (mysql->net.read_pos+1));
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
4568 4569
  return 0;
}
4570

4571

4572
/*
4573
  Fetch and return row data to bound buffers, if any
4574 4575
*/

4576
int STDCALL mysql_stmt_fetch(MYSQL_STMT *stmt)
4577
{
4578
  int rc;
4579
  uchar *row;
4580
  DBUG_ENTER("mysql_stmt_fetch");
4581

4582
  if ((rc= (*stmt->read_row_func)(stmt, &row)) ||
4583
      ((rc= stmt_fetch_row(stmt, row)) && rc != MYSQL_DATA_TRUNCATED))
4584
  {
4585
    stmt->state= MYSQL_STMT_PREPARE_DONE;       /* XXX: this is buggy */
4586 4587
    stmt->read_row_func= (rc == MYSQL_NO_DATA) ? 
      stmt_read_row_no_data : stmt_read_row_no_result_set;
4588
  }
4589
  else
4590
  {
4591 4592
    /* 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
4593
  }
4594
  DBUG_RETURN(rc);
4595 4596
}

4597

4598
/*
4599
  Fetch data for one specified column data
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4600 4601

  SYNOPSIS
4602
    mysql_stmt_fetch_column()
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4603
    stmt		Prepared statement handler
4604
    my_bind		Where data should be placed. Should be filled in as
4605
			when calling mysql_stmt_bind_result()
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4606 4607 4608
    column		Column to fetch (first column is 0)
    ulong offset	Offset in result data (to fetch blob in pieces)
			This is normally 0
4609
  RETURN
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4610 4611
    0	ok
    1	error
4612 4613
*/

4614
int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *my_bind,
4615
                                    uint column, ulong offset)
4616
{
4617
  MYSQL_BIND *param= stmt->bind+column;
4618
  DBUG_ENTER("mysql_stmt_fetch_column");
4619

4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630
  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);
  }

4631 4632 4633
  if (!my_bind->error)
    my_bind->error= &my_bind->error_value;
  *my_bind->error= 0;
4634
  if (param->row_ptr)
4635
  {
4636
    MYSQL_FIELD *field= stmt->fields+column;
4637
    uchar *row= param->row_ptr;
4638 4639 4640 4641 4642
    my_bind->offset= offset;
    if (my_bind->is_null)
      *my_bind->is_null= 0;
    if (my_bind->length) /* Set the length if non char/binary types */
      *my_bind->length= *param->length;
4643
    else
4644 4645
      my_bind->length= &param->length_value;       /* Needed for fetch_result() */
    fetch_result_with_conversion(my_bind, field, &row);
4646
  }
4647 4648
  else
  {
4649 4650
    if (my_bind->is_null)
      *my_bind->is_null= 1;
4651
  }
4652 4653 4654 4655
  DBUG_RETURN(0);
}


4656
/*
4657 4658 4659
  Read all rows of data from server  (binary format)
*/

4660
int cli_read_binary_rows(MYSQL_STMT *stmt)
4661 4662 4663 4664
{
  ulong      pkt_len;
  uchar      *cp;
  MYSQL      *mysql= stmt->mysql;
4665 4666
  MYSQL_DATA *result= &stmt->result;
  MYSQL_ROWS *cur, **prev_ptr= &result->data;
4667
  NET        *net = &mysql->net;
4668
  DBUG_ENTER("cli_read_binary_rows");
4669

4670
  mysql= mysql->last_used_con;
4671

4672
  while ((pkt_len= cli_safe_read(mysql)) != packet_error)
4673
  {
4674 4675
    cp= net->read_pos;
    if (cp[0] != 254 || pkt_len >= 8)
4676
    {
4677 4678 4679 4680
      if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
                                          sizeof(MYSQL_ROWS) + pkt_len - 1)))
      {
        set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
4681
        goto err;
4682 4683 4684 4685 4686
      }
      cur->data= (MYSQL_ROW) (cur+1);
      *prev_ptr= cur;
      prev_ptr= &cur->next;
      memcpy((char *) cur->data, (char *) cp+1, pkt_len-1);
4687 4688
      cur->length= pkt_len;		/* To allow us to do sanity checks */
      result->rows++;
4689
    }
4690
    else
4691
    {
4692 4693 4694 4695
      /* end of data */
      *prev_ptr= 0;
      mysql->warning_count= uint2korr(cp+1);
      mysql->server_status= uint2korr(cp+3);
4696 4697
      DBUG_PRINT("info",("status: %u  warning_count: %u",
                         mysql->server_status, mysql->warning_count));
4698 4699 4700
      DBUG_RETURN(0);
    }
  }
4701
  set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
4702 4703

err:
4704
  DBUG_RETURN(1);
4705 4706
}

4707

4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721
/*
  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)
{
4722
  MYSQL_BIND  *my_bind, *end;
4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733
  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 */

4734
  /* Go through all fields and calculate metadata */
4735 4736 4737
  for (my_bind= stmt->bind, end= my_bind + stmt->field_count, field= stmt->fields ;
       my_bind < end ;
       my_bind++, field++)
4738 4739
  {
    if (!(*null_ptr & bit))
4740
      (*my_bind->skip_result)(my_bind, field, &row);
4741 4742 4743 4744 4745 4746 4747 4748 4749 4750
    DBUG_ASSERT(row <= row_end);
    if (!((bit<<=1) & 255))
    {
      bit= 1;					/* To next byte */
      null_ptr++;
    }
  }
}


4751 4752 4753 4754 4755 4756 4757
/*
  Store or buffer the binary results to stmt
*/

int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
  MYSQL *mysql= stmt->mysql;
4758
  MYSQL_DATA *result= &stmt->result;
4759
  DBUG_ENTER("mysql_stmt_store_result");
4760 4761 4762 4763 4764

  mysql= mysql->last_used_con;

  if (!stmt->field_count)
    DBUG_RETURN(0);
4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785

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

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

    /* Send row request to the server */
    int4store(buff, stmt->stmt_id);
    int4store(buff + 4, (int)~0); /* number of rows to fetch */
    if (cli_advanced_command(mysql, COM_STMT_FETCH, buff, sizeof(buff),
4786
                             NullS, 0, 1, NULL))
4787 4788 4789 4790 4791 4792
    {
      set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
      DBUG_RETURN(1);
    }
  }
  else if (mysql->status != MYSQL_STATUS_GET_RESULT)
4793
  {
4794
    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
4795
    DBUG_RETURN(1);
4796
  }
4797

4798 4799 4800 4801 4802 4803
  if (stmt->update_max_length && !stmt->bind_result_done)
  {
    /*
      We must initalize the bind structure to be able to calculate
      max_length
    */
4804
    MYSQL_BIND  *my_bind, *end;
4805 4806 4807
    MYSQL_FIELD *field;
    bzero((char*) stmt->bind, sizeof(*stmt->bind)* stmt->field_count);

4808 4809 4810 4811
    for (my_bind= stmt->bind, end= my_bind + stmt->field_count,
           field= stmt->fields;
	 my_bind < end ;
	 my_bind++, field++)
4812
    {
4813 4814
      my_bind->buffer_type= MYSQL_TYPE_NULL;
      my_bind->buffer_length=1;
4815 4816
    }

4817 4818
    if (mysql_stmt_bind_result(stmt, stmt->bind))
      DBUG_RETURN(1);
4819 4820 4821
    stmt->bind_result_done= 0;			/* No normal bind done */
  }

4822
  if ((*mysql->methods->read_binary_rows)(stmt))
4823
  {
4824 4825 4826
    free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
    result->data= NULL;
    result->rows= 0;
4827
    mysql->status= MYSQL_STATUS_READY;
4828
    DBUG_RETURN(1);
4829
  }
4830

4831 4832 4833 4834
  /* Assert that if there was a cursor, all rows have been fetched */
  DBUG_ASSERT(mysql->status != MYSQL_STATUS_READY ||
              (mysql->server_status & SERVER_STATUS_LAST_ROW_SENT));

4835 4836 4837 4838 4839 4840 4841
  if (stmt->update_max_length)
  {
    MYSQL_ROWS *cur= result->data;
    for(; cur; cur=cur->next)
      stmt_update_metadata(stmt, cur);
  }

4842 4843
  stmt->data_cursor= result->data;
  mysql->affected_rows= stmt->affected_rows= result->rows;
4844 4845 4846
  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 */
4847
  DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_stmt_fetch() */
4848 4849
}

4850

4851 4852 4853 4854 4855 4856 4857
/*
  Seek to desired row in the statement result set
*/

MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
4858
  MYSQL_ROW_OFFSET offset= stmt->data_cursor;
4859
  DBUG_ENTER("mysql_stmt_row_seek");
4860

4861 4862
  stmt->data_cursor= row;
  DBUG_RETURN(offset);
4863 4864
}

4865

4866 4867 4868 4869
/*
  Return the current statement row cursor position
*/

4870
MYSQL_ROW_OFFSET STDCALL
4871 4872 4873
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_row_tell");
4874

4875
  DBUG_RETURN(stmt->data_cursor);
4876 4877
}

4878

4879 4880 4881 4882 4883 4884 4885
/*
  Move the stmt result set data cursor to specified row
*/

void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
4886
  MYSQL_ROWS *tmp= stmt->result.data;
4887 4888
  DBUG_ENTER("mysql_stmt_data_seek");
  DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
4889

4890 4891 4892
  for (; tmp && row; --row, tmp= tmp->next)
    ;
  stmt->data_cursor= tmp;
4893 4894 4895 4896 4897 4898
  if (!row && tmp)
  {
       /*  Rewind the counter */
    stmt->read_row_func= stmt_read_row_buffered;
    stmt->state= MYSQL_STMT_EXECUTE_DONE;
  }
4899
  DBUG_VOID_RETURN;
4900 4901
}

4902

4903 4904 4905 4906 4907 4908 4909
/*
  Return total rows the current statement result set
*/

my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_num_rows");
4910

4911
  DBUG_RETURN(stmt->result.rows);
4912
}
4913

4914

4915 4916 4917 4918 4919
/*
  Free the client side memory buffers, reset long data state
  on client if necessary, and reset the server side statement if
  this has been requested.
*/
4920

4921 4922 4923
static my_bool reset_stmt_handle(MYSQL_STMT *stmt, uint flags)
{
  /* If statement hasn't been prepared there is nothing to reset */
4924 4925 4926
  if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
  {
    MYSQL *mysql= stmt->mysql;
4927
    MYSQL_DATA *result= &stmt->result;
4928

4929 4930 4931 4932
    /*
      Reset stored result set if so was requested or it's a part
      of cursor fetch.
    */
4933
    if (result->data && (flags & RESET_STORE_RESULT))
4934 4935
    {
      /* Result buffered */
4936 4937 4938 4939
      free_root(&result->alloc, MYF(MY_KEEP_PREALLOC));
      result->data= NULL;
      result->rows= 0;
      stmt->data_cursor= NULL;
4940
    }
4941
    if (flags & RESET_LONG_DATA)
4942
    {
4943 4944 4945 4946 4947
      MYSQL_BIND *param= stmt->params, *param_end= param + stmt->param_count;
      /* Clear long_data_used flags */
      for (; param < param_end; param++)
        param->long_data_used= 0;
    }
4948
    stmt->read_row_func= stmt_read_row_no_result_set;
4949 4950 4951
    if (mysql)
    {
      if ((int) stmt->state > (int) MYSQL_STMT_PREPARE_DONE)
4952
      {
4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963
        if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
          mysql->unbuffered_fetch_owner= 0;
        if (stmt->field_count && mysql->status != MYSQL_STATUS_READY)
        {
          /* There is a result set and it belongs to this statement */
          (*mysql->methods->flush_use_result)(mysql);
          if (mysql->unbuffered_fetch_owner)
            *mysql->unbuffered_fetch_owner= TRUE;
          mysql->status= MYSQL_STATUS_READY;
        }
      }
4964
      if (flags & RESET_SERVER_SIDE)
4965 4966 4967 4968 4969 4970 4971
      {
        /*
          Reset the server side statement and close the server side
          cursor if it exists.
        */
        char buff[MYSQL_STMT_HEADER]; /* packet header: 4 bytes for stmt id */
        int4store(buff, stmt->stmt_id);
4972
        if ((*mysql->methods->advanced_command)(mysql, COM_STMT_RESET, buff,
holyfoot/hf@mysql.com/deer.(none)'s avatar
holyfoot/hf@mysql.com/deer.(none) committed
4973
                                                sizeof(buff), 0, 0, 0, NULL))
4974 4975 4976 4977 4978 4979
        {
          set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                          mysql->net.sqlstate);
          stmt->state= MYSQL_STMT_INIT_DONE;
          return 1;
        }
4980
        stmt_clear_error(stmt);
4981 4982 4983 4984
      }
    }
    stmt->state= MYSQL_STMT_PREPARE_DONE;
  }
4985 4986 4987 4988 4989 4990 4991 4992
  return 0;
}

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

  /* Free the client side and close the server side cursor if there is one */
4993
  DBUG_RETURN(reset_stmt_handle(stmt, RESET_LONG_DATA | RESET_STORE_RESULT));
4994 4995
}

4996
/********************************************************************
4997
 statement error handling and close
4998
*********************************************************************/
4999

5000
/*
5001
  Close the statement handle by freeing all alloced resources
5002

5003
  SYNOPSIS
5004
    mysql_stmt_close()
5005
    stmt	       Statement handle
5006

5007 5008 5009 5010
  RETURN VALUES
    0	ok
    1	error
*/
5011

5012
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
5013
{
5014 5015 5016
  MYSQL *mysql= stmt->mysql;
  int rc= 0;
  DBUG_ENTER("mysql_stmt_close");
5017

5018
  free_root(&stmt->result.alloc, MYF(0));
5019 5020 5021
  free_root(&stmt->mem_root, MYF(0));

  if (mysql)
5022
  {
5023
    mysql->stmts= list_delete(mysql->stmts, &stmt->list);
5024 5025 5026 5027 5028
    /*
      Clear NET error state: if the following commands come through
      successfully, connection will still be usable for other commands.
    */
    net_clear_error(&mysql->net);
5029
    if ((int) stmt->state > (int) MYSQL_STMT_INIT_DONE)
5030
    {
5031
      char buff[MYSQL_STMT_HEADER];             /* 4 bytes - stmt id */
5032 5033 5034 5035 5036

      if (mysql->unbuffered_fetch_owner == &stmt->unbuffered_fetch_cancelled)
        mysql->unbuffered_fetch_owner= 0;
      if (mysql->status != MYSQL_STATUS_READY)
      {
5037
        /*
5038 5039 5040
          Flush result set of the connection. If it does not belong
          to this statement, set a warning.
        */
5041
        (*mysql->methods->flush_use_result)(mysql);
5042 5043 5044 5045 5046
        if (mysql->unbuffered_fetch_owner)
          *mysql->unbuffered_fetch_owner= TRUE;
        mysql->status= MYSQL_STATUS_READY;
      }
      int4store(buff, stmt->stmt_id);
5047
      if ((rc= stmt_command(mysql, COM_STMT_CLOSE, buff, 4, stmt)))
5048 5049 5050 5051
      {
        set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
                        mysql->net.sqlstate);
      }
5052
    }
5053
  }
5054

5055
  my_free((gptr) stmt, MYF(MY_WME));
5056

5057
  DBUG_RETURN(test(rc));
5058 5059
}

5060 5061 5062 5063 5064 5065 5066 5067
/*
  Reset the statement buffers in server
*/

my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_reset");
  DBUG_ASSERT(stmt != 0);
5068 5069 5070 5071
  if (!stmt->mysql)
  {
    /* mysql can be reset in mysql_close called from mysql_reconnect */
    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
5072 5073
    DBUG_RETURN(1);
  }
5074 5075
  /* Reset the client and server sides of the prepared statement */
  DBUG_RETURN(reset_stmt_handle(stmt, RESET_SERVER_SIDE | RESET_LONG_DATA));
5076 5077
}

5078 5079 5080 5081 5082 5083 5084
/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
5085
  DBUG_RETURN(stmt->last_errno);
5086 5087
}

5088 5089 5090 5091 5092 5093
const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_sqlstate");
  DBUG_RETURN(stmt->sqlstate);
}

5094 5095 5096 5097 5098 5099 5100
/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
5101
  DBUG_RETURN(stmt->last_error);
5102 5103
}

5104

5105 5106 5107 5108
/********************************************************************
 Transactional APIs
*********************************************************************/

5109 5110 5111 5112
/*
  Commit the current transaction
*/

5113
my_bool STDCALL mysql_commit(MYSQL * mysql)
5114 5115
{
  DBUG_ENTER("mysql_commit");
5116
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
5117 5118 5119
}

/*
5120
  Rollback the current transaction
5121 5122
*/

5123
my_bool STDCALL mysql_rollback(MYSQL * mysql)
5124 5125
{
  DBUG_ENTER("mysql_rollback");
5126
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
5127 5128 5129 5130 5131 5132 5133
}


/*
  Set autocommit to either true or false
*/

5134
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
5135 5136 5137 5138
{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

5139 5140 5141
  DBUG_RETURN((my_bool) mysql_real_query(mysql, auto_mode ?
                                         "set autocommit=1":"set autocommit=0",
                                         16));
5142
}
5143 5144 5145


/********************************************************************
5146
 Multi query execution + SPs APIs
5147 5148 5149
*********************************************************************/

/*
5150 5151
  Returns true/false to indicate whether any more query results exist
  to be read using mysql_next_result()
5152 5153 5154 5155
*/

my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
5156
  my_bool res;
5157
  DBUG_ENTER("mysql_more_results");
5158 5159

  res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
5160
	1: 0);
5161
  DBUG_PRINT("exit",("More results exists ? %d", res));
5162
  DBUG_RETURN(res);
5163 5164
}

5165

5166 5167 5168
/*
  Reads and returns the next query results
*/
5169
int STDCALL mysql_next_result(MYSQL *mysql)
5170
{
5171
  DBUG_ENTER("mysql_next_result");
5172

5173 5174 5175 5176 5177 5178 5179 5180
  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);
  }

5181 5182
  mysql->net.last_error[0]= 0;
  mysql->net.last_errno= 0;
5183
  strmov(mysql->net.sqlstate, not_error_sqlstate);
5184 5185 5186
  mysql->affected_rows= ~(my_ulonglong) 0;

  if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
5187 5188
    DBUG_RETURN((*mysql->methods->next_result)(mysql));

5189
  DBUG_RETURN(-1);				/* No more results */
5190
}
hf@deer.(none)'s avatar
hf@deer.(none) committed
5191

5192

hf@deer.(none)'s avatar
hf@deer.(none) committed
5193 5194 5195 5196 5197 5198 5199 5200 5201 5202
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);
}