sql_parse.cc 219 KB
Newer Older
1
/* Copyright (C) 2000-2003 MySQL AB
2

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3 4 5 6
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
7

bk@work.mysql.com's avatar
bk@work.mysql.com committed
8 9 10 11
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
12

bk@work.mysql.com's avatar
bk@work.mysql.com committed
13 14 15 16 17
   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 */

#include "mysql_priv.h"
18
#include "sql_repl.h"
19
#include "repl_failsafe.h"
bk@work.mysql.com's avatar
bk@work.mysql.com committed
20 21 22 23
#include <m_ctype.h>
#include <myisam.h>
#include <my_dir.h>

heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
24
#ifdef HAVE_INNOBASE_DB
25
#include "ha_innodb.h"
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
26 27
#endif

28 29 30 31
#ifdef HAVE_NDBCLUSTER_DB
#include "ha_ndbcluster.h"
#endif

32
#include "sp_head.h"
33
#include "sp.h"
34
#include "sp_cache.h"
35

36 37 38 39 40 41 42 43 44 45 46
#ifdef HAVE_OPENSSL
/*
  Without SSL the handshake consists of one packet. This packet
  has both client capabilites and scrambled password.
  With SSL the handshake might consist of two packets. If the first
  packet (client capabilities) has CLIENT_SSL flag set, we have to
  switch to SSL and read the second packet. The scrambled password
  is in the second packet and client_capabilites field will be ignored.
  Maybe it is better to accept flags other than CLIENT_SSL from the
  second packet?
*/
47 48 49
#define SSL_HANDSHAKE_SIZE      2
#define NORMAL_HANDSHAKE_SIZE   6
#define MIN_HANDSHAKE_SIZE      2
50
#else
51
#define MIN_HANDSHAKE_SIZE      6
52
#endif /* HAVE_OPENSSL */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
53

54 55 56 57 58 59
/* Used in error handling only */
#define SP_TYPE_STRING(LP) \
  ((LP)->sphead->m_type == TYPE_ENUM_FUNCTION ? "FUNCTION" : "PROCEDURE")
#define SP_COM_STRING(LP) \
  ((LP)->sql_command == SQLCOM_CREATE_SPFUNCTION || \
   (LP)->sql_command == SQLCOM_ALTER_FUNCTION || \
60
   (LP)->sql_command == SQLCOM_SHOW_CREATE_FUNC || \
61 62 63
   (LP)->sql_command == SQLCOM_DROP_FUNCTION ? \
   "FUNCTION" : "PROCEDURE")

64 65 66
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
67

68
static void time_out_user_resource_limits(THD *thd, USER_CONN *uc);
69
#ifndef NO_EMBEDDED_ACCESS_CHECKS
70
static int check_for_max_user_connections(THD *thd, USER_CONN *uc);
71
#endif
72
static void decrease_user_connections(USER_CONN *uc);
73
static bool check_db_used(THD *thd,TABLE_LIST *tables);
74
static bool check_multi_update_lock(THD *thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
75 76
static void remove_escape(char *name);
static void refresh_status(void);
77 78
static bool append_file_to_dir(THD *thd, const char **filename_ptr,
			       const char *table_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
79

80
const char *any_db="*any*";	// Special symbol for check_access
bk@work.mysql.com's avatar
bk@work.mysql.com committed
81 82 83 84

const char *command_name[]={
  "Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
  "Drop DB", "Refresh", "Shutdown", "Statistics", "Processlist",
85
  "Connect","Kill","Debug","Ping","Time","Delayed insert","Change user",
86
  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave",
87
  "Prepare", "Execute", "Long Data", "Close stmt",
88
  "Reset stmt", "Set option", "Fetch",
89
  "Error"					// Last command number
bk@work.mysql.com's avatar
bk@work.mysql.com committed
90 91
};

92 93 94 95
const char *xa_state_names[]={
  "NON-EXISTING", "ACTIVE", "IDLE", "PREPARED"
};

96
static char empty_c_string[1]= {0};		// Used for not defined 'db'
bk@work.mysql.com's avatar
bk@work.mysql.com committed
97 98 99 100

#ifdef __WIN__
static void  test_signal(int sig_ptr)
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
101
#if !defined( DBUG_OFF)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
102 103
  MessageBox(NULL,"Test signal","DBUG",MB_OK);
#endif
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
104
#if defined(OS2)
105 106
  fprintf(stderr, "Test signal %d\n", sig_ptr);
  fflush(stderr);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
107
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
108 109 110 111
}
static void init_signals(void)
{
  int signals[7] = {SIGINT,SIGILL,SIGFPE,SIGSEGV,SIGTERM,SIGBREAK,SIGABRT } ;
112
  for (int i=0 ; i < 7 ; i++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
113 114 115 116
    signal( signals[i], test_signal) ;
}
#endif

117 118 119 120 121
static void unlock_locked_tables(THD *thd)
{
  if (thd->locked_tables)
  {
    thd->lock=thd->locked_tables;
122
    thd->locked_tables=0;			// Will be automatically closed
123 124 125 126
    close_thread_tables(thd);			// Free tables
  }
}

127

128
static bool end_active_trans(THD *thd)
129
{
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
130
  int error=0;
131
  DBUG_ENTER("end_active_trans");
132
  if (unlikely(thd->in_sub_stmt))
133 134 135 136
  {
    my_error(ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0));
    DBUG_RETURN(1);
  }
137
  if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN |
138
		      OPTION_TABLE_LOCK))
139
  {
140 141 142 143
    DBUG_PRINT("info",("options: 0x%lx", (ulong) thd->options));
    /* Safety if one did "drop table" on locked tables */
    if (!thd->locked_tables)
      thd->options&= ~OPTION_TABLE_LOCK;
144
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
145
    if (ha_commit(thd))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
146
      error=1;
147
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
148
  }
149
  DBUG_RETURN(error);
150 151
}

152 153 154
static bool begin_trans(THD *thd)
{
  int error=0;
155
  if (unlikely(thd->in_sub_stmt))
156 157 158 159
  {
    my_error(ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0));
    return 1;
  }
160 161 162 163 164 165 166 167 168 169
  if (thd->locked_tables)
  {
    thd->lock=thd->locked_tables;
    thd->locked_tables=0;			// Will be automatically closed
    close_thread_tables(thd);			// Free tables
  }
  if (end_active_trans(thd))
    error= -1;
  else
  {
170
    LEX *lex= thd->lex;
171 172 173 174
    thd->options= ((thd->options & (ulong) ~(OPTION_STATUS_NO_TRANS_UPDATE)) |
		   OPTION_BEGIN);
    thd->server_status|= SERVER_STATUS_IN_TRANS;
    if (lex->start_transaction_opt & MYSQL_START_TRANS_OPT_WITH_CONS_SNAPSHOT)
serg@serg.mylan's avatar
serg@serg.mylan committed
175
      error= ha_start_consistent_snapshot(thd);
176 177 178
  }
  return error;
}
179

monty@mysql.com's avatar
monty@mysql.com committed
180
#ifdef HAVE_REPLICATION
181 182 183
/*
  Returns true if all tables should be ignored
*/
184 185
inline bool all_tables_not_ok(THD *thd, TABLE_LIST *tables)
{
serg@serg.mylan's avatar
serg@serg.mylan committed
186
  return table_rules_on && tables && !tables_ok(thd,tables);
187
}
monty@mysql.com's avatar
monty@mysql.com committed
188
#endif
189 190


191 192
static HASH hash_user_connections;

193 194
static int get_or_create_user_conn(THD *thd, const char *user,
				   const char *host,
peter@mysql.com's avatar
peter@mysql.com committed
195
				   USER_RESOURCES *mqh)
196
{
197
  int return_val= 0;
198
  uint temp_len, user_len;
199 200 201 202 203 204
  char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
  struct  user_conn *uc;

  DBUG_ASSERT(user != 0);
  DBUG_ASSERT(host != 0);

205
  user_len= strlen(user);
206
  temp_len= (strmov(strmov(temp_user, user)+1, host) - temp_user)+1;
207
  (void) pthread_mutex_lock(&LOCK_user_conn);
208 209
  if (!(uc = (struct  user_conn *) hash_search(&hash_user_connections,
					       (byte*) temp_user, temp_len)))
210
  {
211 212 213
    /* First connection for user; Create a user connection object */
    if (!(uc= ((struct user_conn*)
	       my_malloc(sizeof(struct user_conn) + temp_len+1,
214 215
			 MYF(MY_WME)))))
    {
216
      net_send_error(thd, 0, NullS);		// Out of memory
217
      return_val= 1;
218
      goto end;
219
    }
220 221
    uc->user=(char*) (uc+1);
    memcpy(uc->user,temp_user,temp_len+1);
222
    uc->host= uc->user + user_len +  1;
223
    uc->len= temp_len;
224
    uc->connections= uc->questions= uc->updates= uc->conn_per_hour= 0;
225 226
    uc->user_resources= *mqh;
    uc->intime= thd->thr_create_time;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
227
    if (my_hash_insert(&hash_user_connections, (byte*) uc))
228 229
    {
      my_free((char*) uc,0);
230
      net_send_error(thd, 0, NullS);		// Out of memory
231
      return_val= 1;
232 233 234 235
      goto end;
    }
  }
  thd->user_connect=uc;
236
  uc->connections++;
237 238 239
end:
  (void) pthread_mutex_unlock(&LOCK_user_conn);
  return return_val;
peter@mysql.com's avatar
peter@mysql.com committed
240

241
}
242 243 244


/*
245 246
  Check if user exist and password supplied is correct. 

247 248
  SYNOPSIS
    check_user()
249
    thd          thread handle, thd->security_ctx->{host,user,ip} are used
250 251 252
    command      originator of the check: now check_user is called
                 during connect and change user procedures; used for 
                 logging.
253
    passwd       scrambled password received from client
254 255 256 257
    passwd_len   length of scrambled password
    db           database name to connect to, may be NULL
    check_count  dont know exactly

258
    Note, that host, user and passwd may point to communication buffer.
259
    Current implementation does not depend on that, but future changes
260 261 262
    should be done with this in mind; 'thd' is INOUT, all other params
    are 'IN'.

263
  RETURN VALUE
264 265
    0  OK; thd->security_ctx->user/master_access/priv_user/db_access and
       thd->db are updated; OK is sent to client;
266 267
   -1  access denied or handshake error; error is sent to client;
   >0  error, not sent to client
bk@work.mysql.com's avatar
bk@work.mysql.com committed
268 269
*/

hf@deer.(none)'s avatar
hf@deer.(none) committed
270 271 272
int check_user(THD *thd, enum enum_server_command command, 
	       const char *passwd, uint passwd_len, const char *db,
	       bool check_count)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
273
{
274
  DBUG_ENTER("check_user");
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
275
  
monty@mysql.com's avatar
monty@mysql.com committed
276
#ifdef NO_EMBEDDED_ACCESS_CHECKS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
277
  thd->main_security_ctx.master_access= GLOBAL_ACLS;       // Full rights
278
  /* Change database if necessary */
279 280
  if (db && db[0])
  {
281 282 283 284
    /*
      thd->db is saved in caller and needs to be freed by caller if this
      function returns 0
    */
285 286
    thd->db= 0;
    thd->db_length= 0;
287
    if (mysql_change_db(thd, db, FALSE))
288
    {
289 290
      /* Send the error to the client */
      net_send_error(thd);
291 292 293 294 295
      if (thd->user_connect)
	decrease_user_connections(thd->user_connect);
      DBUG_RETURN(-1);
    }
  }
296
  send_ok(thd);
297
  DBUG_RETURN(0);
monty@mysql.com's avatar
monty@mysql.com committed
298 299
#else

300 301 302 303 304
  my_bool opt_secure_auth_local;
  pthread_mutex_lock(&LOCK_global_system_variables);
  opt_secure_auth_local= opt_secure_auth;
  pthread_mutex_unlock(&LOCK_global_system_variables);
  
305
  /*
306 307
    If the server is running in secure auth mode, short scrambles are 
    forbidden.
308
  */
309
  if (opt_secure_auth_local && passwd_len == SCRAMBLE_LENGTH_323)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
310
  {
311
    net_printf_error(thd, ER_NOT_SUPPORTED_AUTH_MODE);
312 313
    mysql_log.write(thd, COM_CONNECT, ER(ER_NOT_SUPPORTED_AUTH_MODE));
    DBUG_RETURN(-1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
314
  }
315 316 317 318
  if (passwd_len != 0 &&
      passwd_len != SCRAMBLE_LENGTH &&
      passwd_len != SCRAMBLE_LENGTH_323)
    DBUG_RETURN(ER_HANDSHAKE_ERROR);
peter@mysql.com's avatar
peter@mysql.com committed
319

320
  /*
321
    Clear thd->db as it points to something, that will be freed when 
322
    connection is closed. We don't want to accidentally free a wrong pointer
323 324
    if connect failed. Also in case of 'CHANGE USER' failure, current
    database will be switched to 'no database selected'.
325
  */
326 327
  thd->db= 0;
  thd->db_length= 0;
328
  
329
  USER_RESOURCES ur;
330
  int res= acl_getroot(thd, &ur, passwd, passwd_len);
hf@deer.(none)'s avatar
hf@deer.(none) committed
331
#ifndef EMBEDDED_LIBRARY
332
  if (res == -1)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
333
  {
334 335 336 337 338 339
    /*
      This happens when client (new) sends password scrambled with
      scramble(), but database holds old value (scrambled with
      scramble_323()). Here we please client to send scrambled_password
      in old format.
    */
340
    NET *net= &thd->net;
341
    if (opt_secure_auth_local)
342
    {
343
      net_printf_error(thd, ER_SERVER_IS_IN_SECURE_AUTH_MODE,
344 345
                       thd->main_security_ctx.user,
                       thd->main_security_ctx.host_or_ip);
346
      mysql_log.write(thd, COM_CONNECT, ER(ER_SERVER_IS_IN_SECURE_AUTH_MODE),
347 348
                      thd->main_security_ctx.user,
                      thd->main_security_ctx.host_or_ip);
349 350
      DBUG_RETURN(-1);
    }
monty@mysql.com's avatar
monty@mysql.com committed
351
    /* We have to read very specific packet size */
352
    if (send_old_password_request(thd) ||
monty@mysql.com's avatar
monty@mysql.com committed
353
        my_net_read(net) != SCRAMBLE_LENGTH_323 + 1)
354
    {
355 356 357 358 359
      inc_host_errors(&thd->remote.sin_addr);
      DBUG_RETURN(ER_HANDSHAKE_ERROR);
    }
    /* Final attempt to check the user based on reply */
    /* So as passwd is short, errcode is always >= 0 */
360
    res= acl_getroot(thd, &ur, (char *) net->read_pos, SCRAMBLE_LENGTH_323);
361
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
362
#endif /*EMBEDDED_LIBRARY*/
363 364
  /* here res is always >= 0 */
  if (res == 0)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
365
  {
366 367
    if (!(thd->main_security_ctx.master_access &
          NO_ACCESS)) // authentication is OK
368
    {
369 370 371 372
      DBUG_PRINT("info",
                 ("Capabilities: %d  packet_length: %ld  Host: '%s'  "
                  "Login user: '%s' Priv_user: '%s'  Using password: %s "
                  "Access: %u  db: '%s'",
373 374 375 376 377
                  thd->client_capabilities,
                  thd->max_client_packet_length,
                  thd->main_security_ctx.host_or_ip,
                  thd->main_security_ctx.user,
                  thd->main_security_ctx.priv_user,
378
                  passwd_len ? "yes": "no",
379 380
                  thd->main_security_ctx.master_access,
                  (thd->db ? thd->db : "*none*")));
381 382

      if (check_count)
383
      {
384
        VOID(pthread_mutex_lock(&LOCK_thread_count));
serg@serg.mylan's avatar
serg@serg.mylan committed
385
        bool count_ok= thread_count <= max_connections + delayed_insert_threads
386
                       || (thd->main_security_ctx.master_access & SUPER_ACL);
387 388
        VOID(pthread_mutex_unlock(&LOCK_thread_count));
        if (!count_ok)
serg@serg.mylan's avatar
serg@serg.mylan committed
389
        {                                         // too many connections
390
          net_send_error(thd, ER_CON_COUNT_ERROR);
391 392
          DBUG_RETURN(-1);
        }
393
      }
peter@mysql.com's avatar
peter@mysql.com committed
394

395
      /* Why logging is performed before all checks've passed? */
396
      mysql_log.write(thd, command,
397 398
                      (thd->main_security_ctx.priv_user ==
                       thd->main_security_ctx.user ?
399 400
                       (char*) "%s@%s on %s" :
                       (char*) "%s@%s as anonymous on %s"),
401 402
                      thd->main_security_ctx.user,
                      thd->main_security_ctx.host_or_ip,
403 404
                      db ? db : (char*) "");

405
      /*
406 407 408
        This is the default access rights for the current database.  It's
        set to 0 here because we don't have an active database yet (and we
        may not have an active database to set.
409
      */
410
      thd->main_security_ctx.db_access=0;
411 412

      /* Don't allow user to connect if he has done too many queries */
413
      if ((ur.questions || ur.updates || ur.conn_per_hour || ur.user_conn ||
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
414
	   max_user_connections) &&
415
	  get_or_create_user_conn(thd,
416 417 418 419
            (opt_old_style_user_limits ? thd->main_security_ctx.user :
             thd->main_security_ctx.priv_user),
            (opt_old_style_user_limits ? thd->main_security_ctx.host_or_ip :
             thd->main_security_ctx.priv_host),
420
            &ur))
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
421 422
	DBUG_RETURN(-1);
      if (thd->user_connect &&
423 424
	  (thd->user_connect->user_resources.conn_per_hour ||
	   thd->user_connect->user_resources.user_conn ||
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
425 426 427
	   max_user_connections) &&
	  check_for_max_user_connections(thd, thd->user_connect))
	DBUG_RETURN(-1);
428

429
      /* Change database if necessary */
430
      if (db && db[0])
431
      {
432
        if (mysql_change_db(thd, db, FALSE))
433
        {
434 435
          /* Send error to the client */
          net_send_error(thd);
436 437 438 439
          if (thd->user_connect)
            decrease_user_connections(thd->user_connect);
          DBUG_RETURN(-1);
        }
440
      }
441
      send_ok(thd);
442 443 444
      thd->password= test(passwd_len);          // remember for error messages 
      /* Ready to handle queries */
      DBUG_RETURN(0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
445 446
    }
  }
447
  else if (res == 2) // client gave short hash, server has long hash
448
  {
449
    net_printf_error(thd, ER_NOT_SUPPORTED_AUTH_MODE);
450 451
    mysql_log.write(thd,COM_CONNECT,ER(ER_NOT_SUPPORTED_AUTH_MODE));
    DBUG_RETURN(-1);
452
  }
453
  net_printf_error(thd, ER_ACCESS_DENIED_ERROR,
454 455
                   thd->main_security_ctx.user,
                   thd->main_security_ctx.host_or_ip,
456
                   passwd_len ? ER(ER_YES) : ER(ER_NO));
457
  mysql_log.write(thd, COM_CONNECT, ER(ER_ACCESS_DENIED_ERROR),
458 459
                  thd->main_security_ctx.user,
                  thd->main_security_ctx.host_or_ip,
460 461
                  passwd_len ? ER(ER_YES) : ER(ER_NO));
  DBUG_RETURN(-1);
monty@mysql.com's avatar
monty@mysql.com committed
462
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
463 464
}

465
/*
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
466 467
  Check for maximum allowable user connections, if the mysqld server is
  started with corresponding variable that is greater then 0.
468 469
*/

470 471
extern "C" byte *get_key_conn(user_conn *buff, uint *length,
			      my_bool not_used __attribute__((unused)))
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
472 473 474 475 476
{
  *length=buff->len;
  return (byte*) buff->user;
}

477
extern "C" void free_user(struct user_conn *uc)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
478 479 480 481
{
  my_free((char*) uc,MYF(0));
}

peter@mysql.com's avatar
peter@mysql.com committed
482
void init_max_user_conn(void)
483
{
484 485
  (void) hash_init(&hash_user_connections,system_charset_info,max_connections,
		   0,0,
486
		   (hash_get_key) get_key_conn, (hash_free_key) free_user,
487
		   0);
488 489 490
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
/*
  check if user has already too many connections
  
  SYNOPSIS
  check_for_max_user_connections()
  thd			Thread handle
  uc			User connect object

  NOTES
    If check fails, we decrease user connection count, which means one
    shouldn't call decrease_user_connections() after this function.

  RETURN
    0	ok
    1	error
*/

508 509
#ifndef NO_EMBEDDED_ACCESS_CHECKS

510
static int check_for_max_user_connections(THD *thd, USER_CONN *uc)
511
{
512
  int error=0;
513
  DBUG_ENTER("check_for_max_user_connections");
peter@mysql.com's avatar
peter@mysql.com committed
514

515
  (void) pthread_mutex_lock(&LOCK_user_conn);
516
  if (max_user_connections && !uc->user_resources.user_conn &&
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
517
      max_user_connections < (uint) uc->connections)
518
  {
519
    net_printf_error(thd, ER_TOO_MANY_USER_CONNECTIONS, uc->user);
520 521
    error=1;
    goto end;
522
  }
523
  time_out_user_resource_limits(thd, uc);
524 525 526 527 528 529 530 531 532 533 534
  if (uc->user_resources.user_conn &&
      uc->user_resources.user_conn < uc->connections)
  {
    net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user,
                     "max_user_connections",
                     (long) uc->user_resources.user_conn);
    error= 1;
    goto end;
  }
  if (uc->user_resources.conn_per_hour &&
      uc->user_resources.conn_per_hour <= uc->conn_per_hour)
535
  {
536
    net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user,
jimw@mysql.com's avatar
jimw@mysql.com committed
537
                     "max_connections_per_hour",
538
                     (long) uc->user_resources.conn_per_hour);
539 540 541
    error=1;
    goto end;
  }
542
  uc->conn_per_hour++;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
543 544

  end:
545 546
  if (error)
    uc->connections--; // no need for decrease_user_connections() here
547
  (void) pthread_mutex_unlock(&LOCK_user_conn);
548
  DBUG_RETURN(error);
549
}
550
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
551

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569
/*
  Decrease user connection count

  SYNOPSIS
    decrease_user_connections()
    uc			User connection object

  NOTES
    If there is a n user connection object for a connection
    (which only happens if 'max_user_connections' is defined or
    if someone has created a resource grant for a user), then
    the connection count is always incremented on connect.

    The user connect object is not freed if some users has
    'max connections per hour' defined as we need to be able to hold
    count over the lifetime of the connection.
*/

570
static void decrease_user_connections(USER_CONN *uc)
571
{
572
  DBUG_ENTER("decrease_user_connections");
573 574 575
  (void) pthread_mutex_lock(&LOCK_user_conn);
  DBUG_ASSERT(uc->connections);
  if (!--uc->connections && !mqh_used)
576 577
  {
    /* Last connection for user; Delete it */
578
    (void) hash_delete(&hash_user_connections,(byte*) uc);
579
  }
580
  (void) pthread_mutex_unlock(&LOCK_user_conn);
581
  DBUG_VOID_RETURN;
582 583
}

584

585 586 587 588 589
void free_max_user_conn(void)
{
  hash_free(&hash_user_connections);
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
590

591 592 593
/*
  Mark all commands that somehow changes a table
  This is used to check number of updates / hour
kent@mysql.com's avatar
kent@mysql.com committed
594 595 596

  sql_command is actually set to SQLCOM_END sometimes
  so we need the +1 to include it in the array.
597 598 599 600 601 602

  numbers are:
     0  - read-only query
  != 0  - query that may change a table
     2  - query that returns meaningful ROW_COUNT() -
          a number of modified rows
603 604
*/

kent@mysql.com's avatar
kent@mysql.com committed
605
char  uc_update_queries[SQLCOM_END+1];
606 607 608

void init_update_queries(void)
{
kent@mysql.com's avatar
kent@mysql.com committed
609 610
  bzero((gptr) &uc_update_queries, sizeof(uc_update_queries));

611 612 613
  uc_update_queries[SQLCOM_CREATE_TABLE]=1;
  uc_update_queries[SQLCOM_CREATE_INDEX]=1;
  uc_update_queries[SQLCOM_ALTER_TABLE]=1;
614 615 616 617 618 619
  uc_update_queries[SQLCOM_UPDATE]=2;
  uc_update_queries[SQLCOM_UPDATE_MULTI]=2;
  uc_update_queries[SQLCOM_INSERT]=2;
  uc_update_queries[SQLCOM_INSERT_SELECT]=2;
  uc_update_queries[SQLCOM_DELETE]=2;
  uc_update_queries[SQLCOM_DELETE_MULTI]=2;
620 621 622 623 624
  uc_update_queries[SQLCOM_TRUNCATE]=1;
  uc_update_queries[SQLCOM_DROP_TABLE]=1;
  uc_update_queries[SQLCOM_LOAD]=1;
  uc_update_queries[SQLCOM_CREATE_DB]=1;
  uc_update_queries[SQLCOM_DROP_DB]=1;
625 626
  uc_update_queries[SQLCOM_REPLACE]=2;
  uc_update_queries[SQLCOM_REPLACE_SELECT]=2;
627 628 629 630
  uc_update_queries[SQLCOM_RENAME_TABLE]=1;
  uc_update_queries[SQLCOM_BACKUP_TABLE]=1;
  uc_update_queries[SQLCOM_RESTORE_TABLE]=1;
  uc_update_queries[SQLCOM_DROP_INDEX]=1;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
631 632
  uc_update_queries[SQLCOM_CREATE_VIEW]=1;
  uc_update_queries[SQLCOM_DROP_VIEW]=1;
633 634
}

635 636
bool is_update_query(enum enum_sql_command command)
{
kent@mysql.com's avatar
kent@mysql.com committed
637
  DBUG_ASSERT(command >= 0 && command <= SQLCOM_END);
638
  return uc_update_queries[command] != 0;
639
}
640

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
641
/*
642 643
  Reset per-hour user resource limits when it has been more than
  an hour since they were last checked
644

645 646 647 648
  SYNOPSIS:
    time_out_user_resource_limits()
    thd			Thread handler
    uc			User connection details
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
649

650 651 652 653
  NOTE:
    This assumes that the LOCK_user_conn mutex has been acquired, so it is
    safe to test and modify members of the USER_CONN structure.
*/
654

655
static void time_out_user_resource_limits(THD *thd, USER_CONN *uc)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
656
{
657
  time_t check_time = thd->start_time ?  thd->start_time : time(NULL);
658
  DBUG_ENTER("time_out_user_resource_limits");
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
659

660
  /* If more than a hour since last check, reset resource checking */
661 662 663 664 665 666 667
  if (check_time  - uc->intime >= 3600)
  {
    uc->questions=1;
    uc->updates=0;
    uc->conn_per_hour=0;
    uc->intime=check_time;
  }
668 669 670 671 672 673 674 675 676 677 678 679

  DBUG_VOID_RETURN;
}


/*
  Check if maximum queries per hour limit has been reached
  returns 0 if OK.
*/

static bool check_mqh(THD *thd, uint check_command)
{
680 681
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  bool error= 0;
682 683 684 685 686 687 688 689
  USER_CONN *uc=thd->user_connect;
  DBUG_ENTER("check_mqh");
  DBUG_ASSERT(uc != 0);

  (void) pthread_mutex_lock(&LOCK_user_conn);

  time_out_user_resource_limits(thd, uc);

690
  /* Check that we have not done too many questions / hour */
691 692 693
  if (uc->user_resources.questions &&
      uc->questions++ >= uc->user_resources.questions)
  {
694 695
    net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user, "max_questions",
                     (long) uc->user_resources.questions);
696 697 698
    error=1;
    goto end;
  }
699
  if (check_command < (uint) SQLCOM_END)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
700
  {
701 702 703 704
    /* Check that we have not done too many updates / hour */
    if (uc->user_resources.updates && uc_update_queries[check_command] &&
	uc->updates++ >= uc->user_resources.updates)
    {
705 706
      net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user, "max_updates",
                       (long) uc->user_resources.updates);
707 708 709
      error=1;
      goto end;
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
710 711
  }
end:
712
  (void) pthread_mutex_unlock(&LOCK_user_conn);
713
  DBUG_RETURN(error);
714 715
#else
  return (0);
monty@mysql.com's avatar
monty@mysql.com committed
716
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
717 718
}

719

monty@mysql.com's avatar
monty@mysql.com committed
720
static void reset_mqh(LEX_USER *lu, bool get_them= 0)
721
{
monty@mysql.com's avatar
monty@mysql.com committed
722
#ifndef NO_EMBEDDED_ACCESS_CHECKS
723
  (void) pthread_mutex_lock(&LOCK_user_conn);
peter@mysql.com's avatar
peter@mysql.com committed
724
  if (lu)  // for GRANT
725
  {
726
    USER_CONN *uc;
727
    uint temp_len=lu->user.length+lu->host.length+2;
728 729
    char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];

730 731
    memcpy(temp_user,lu->user.str,lu->user.length);
    memcpy(temp_user+lu->user.length+1,lu->host.str,lu->host.length);
732
    temp_user[lu->user.length]='\0'; temp_user[temp_len-1]=0;
733
    if ((uc = (struct  user_conn *) hash_search(&hash_user_connections,
734
						(byte*) temp_user, temp_len)))
735 736
    {
      uc->questions=0;
737
      get_mqh(temp_user,&temp_user[lu->user.length+1],uc);
738 739
      uc->updates=0;
      uc->conn_per_hour=0;
740 741
    }
  }
monty@mysql.com's avatar
monty@mysql.com committed
742
  else
743
  {
monty@mysql.com's avatar
monty@mysql.com committed
744
    /* for FLUSH PRIVILEGES and FLUSH USER_RESOURCES */
745
    for (uint idx=0;idx < hash_user_connections.records; idx++)
746
    {
monty@mysql.com's avatar
monty@mysql.com committed
747 748
      USER_CONN *uc=(struct user_conn *) hash_element(&hash_user_connections,
						      idx);
749 750 751 752 753
      if (get_them)
	get_mqh(uc->user,uc->host,uc);
      uc->questions=0;
      uc->updates=0;
      uc->conn_per_hour=0;
754 755
    }
  }
756
  (void) pthread_mutex_unlock(&LOCK_user_conn);
monty@mysql.com's avatar
monty@mysql.com committed
757
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
758
}
759

bk@work.mysql.com's avatar
bk@work.mysql.com committed
760
/*
761
    Perform handshake, authorize client and update thd ACL variables.
762
  SYNOPSIS
763
    check_connection()
764
    thd  thread handle
765 766

  RETURN
767
     0  success, OK is sent to user, thd is updated.
768 769
    -1  error, which is sent to user
   > 0  error code (not sent to user)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
770 771
*/

hf@deer.(none)'s avatar
hf@deer.(none) committed
772 773
#ifndef EMBEDDED_LIBRARY
static int check_connection(THD *thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
774
{
775
  uint connect_errors= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
776
  NET *net= &thd->net;
monty@mysql.com's avatar
monty@mysql.com committed
777 778
  ulong pkt_len= 0;
  char *end;
779

780 781 782
  DBUG_PRINT("info",
             ("New connection received on %s", vio_description(net->vio)));

783
  if (!thd->main_security_ctx.host)         // If TCP/IP connection
bk@work.mysql.com's avatar
bk@work.mysql.com committed
784
  {
785
    char ip[30];
786

787
    if (vio_peer_addr(net->vio, ip, &thd->peer_port))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
788
      return (ER_BAD_HOST_ERROR);
789
    if (!(thd->main_security_ctx.ip= my_strdup(ip,MYF(0))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
790
      return (ER_OUT_OF_RESOURCES);
791
    thd->main_security_ctx.host_or_ip= thd->main_security_ctx.ip;
monty@mysql.com's avatar
monty@mysql.com committed
792
    vio_in_addr(net->vio,&thd->remote.sin_addr);
793
    if (!(specialflag & SPECIAL_NO_RESOLVE))
794
    {
795
      vio_in_addr(net->vio,&thd->remote.sin_addr);
796 797
      thd->main_security_ctx.host=
        ip_to_hostname(&thd->remote.sin_addr, &connect_errors);
798
      /* Cut very long hostnames to avoid possible overflows */
799
      if (thd->main_security_ctx.host)
800
      {
801 802 803 804
        if (thd->main_security_ctx.host != my_localhost)
          thd->main_security_ctx.host[min(strlen(thd->main_security_ctx.host),
                                          HOSTNAME_LENGTH)]= 0;
        thd->main_security_ctx.host_or_ip= thd->main_security_ctx.host;
805
      }
806 807
      if (connect_errors > max_connect_errors)
        return(ER_HOST_IS_BLOCKED);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
808
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
809
    DBUG_PRINT("info",("Host: %s  ip: %s",
810 811 812 813 814
		       (thd->main_security_ctx.host ?
                        thd->main_security_ctx.host : "unknown host"),
		       (thd->main_security_ctx.ip ?
                        thd->main_security_ctx.ip : "unknown ip")));
    if (acl_check_host(thd->main_security_ctx.host, thd->main_security_ctx.ip))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
815 816
      return(ER_HOST_NOT_PRIVILEGED);
  }
817
  else /* Hostname given means that the connection was on a socket */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
818
  {
819 820 821
    DBUG_PRINT("info",("Host: %s", thd->main_security_ctx.host));
    thd->main_security_ctx.host_or_ip= thd->main_security_ctx.host;
    thd->main_security_ctx.ip= 0;
822 823
    /* Reset sin_addr */
    bzero((char*) &thd->remote, sizeof(thd->remote));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
824 825 826
  }
  vio_keepalive(net->vio, TRUE);
  {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
827
    /* buff[] needs to big enough to hold the server_version variable */
828
    char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH + 64];
829 830
    ulong client_flags = (CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB |
			  CLIENT_PROTOCOL_41 | CLIENT_SECURE_CONNECTION);
831

832 833 834 835 836
    if (opt_using_transactions)
      client_flags|=CLIENT_TRANSACTIONS;
#ifdef HAVE_COMPRESS
    client_flags |= CLIENT_COMPRESS;
#endif /* HAVE_COMPRESS */
837 838
#ifdef HAVE_OPENSSL
    if (ssl_acceptor_fd)
839
      client_flags |= CLIENT_SSL;       /* Wow, SSL is available! */
840
#endif /* HAVE_OPENSSL */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
841

842 843 844 845 846 847 848 849 850 851 852
    end= strnmov(buff, server_version, SERVER_VERSION_LENGTH) + 1;
    int4store((uchar*) end, thd->thread_id);
    end+= 4;
    /*
      So as check_connection is the only entry point to authorization
      procedure, scramble is set here. This gives us new scramble for
      each handshake.
    */
    create_random_string(thd->scramble, SCRAMBLE_LENGTH, &thd->rand);
    /*
      Old clients does not understand long scrambles, but can ignore packet
853
      tail: that's why first part of the scramble is placed here, and second
854 855
      part at the end of packet.
    */
856
    end= strmake(end, thd->scramble, SCRAMBLE_LENGTH_323) + 1;
857 858 859
   
    int2store(end, client_flags);
    /* write server characteristics: up to 16 bytes allowed */
860
    end[2]=(char) default_charset_info->number;
861 862 863 864 865 866 867 868 869
    int2store(end+3, thd->server_status);
    bzero(end+5, 13);
    end+= 18;
    /* write scramble tail */
    end= strmake(end, thd->scramble + SCRAMBLE_LENGTH_323, 
                 SCRAMBLE_LENGTH - SCRAMBLE_LENGTH_323) + 1;

    /* At this point we write connection message and read reply */
    if (net_write_command(net, (uchar) protocol_version, "", 0, buff,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
870
			  (uint) (end-buff)) ||
871
	(pkt_len= my_net_read(net)) == packet_error ||
bk@work.mysql.com's avatar
bk@work.mysql.com committed
872 873 874 875 876 877 878 879 880 881 882
	pkt_len < MIN_HANDSHAKE_SIZE)
    {
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
  }
#ifdef _CUSTOMCONFIG_
#include "_cust_sql_parse.h"
#endif
  if (connect_errors)
    reset_host_errors(&thd->remote.sin_addr);
883
  if (thd->packet.alloc(thd->variables.net_buffer_length))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
884 885 886
    return(ER_OUT_OF_RESOURCES);

  thd->client_capabilities=uint2korr(net->read_pos);
887 888 889 890
  if (thd->client_capabilities & CLIENT_PROTOCOL_41)
  {
    thd->client_capabilities|= ((ulong) uint2korr(net->read_pos+2)) << 16;
    thd->max_client_packet_length= uint4korr(net->read_pos+4);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
891 892 893
    DBUG_PRINT("info", ("client_character_set: %d", (uint) net->read_pos[8]));
    /*
      Use server character set and collation if
894
      - opt_character_set_client_handshake is not set
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
895 896 897 898
      - client has not specified a character set
      - client character set is the same as the servers
      - client character set doesn't exists in server
    */
899
    if (!opt_character_set_client_handshake ||
900
        !(thd->variables.character_set_client=
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
901 902 903 904
	  get_charset((uint) net->read_pos[8], MYF(0))) ||
	!my_strcasecmp(&my_charset_latin1,
		       global_system_variables.character_set_client->name,
		       thd->variables.character_set_client->name))
905
    {
906 907
      thd->variables.character_set_client=
	global_system_variables.character_set_client;
908 909
      thd->variables.collation_connection=
	global_system_variables.collation_connection;
910 911
      thd->variables.character_set_results=
	global_system_variables.character_set_results;
912 913 914
    }
    else
    {
915
      thd->variables.character_set_results=
916 917 918
      thd->variables.collation_connection= 
	thd->variables.character_set_client;
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
919
    thd->update_charset();
920
    end= (char*) net->read_pos+32;
921 922 923 924 925 926 927
  }
  else
  {
    thd->max_client_packet_length= uint3korr(net->read_pos+2);
    end= (char*) net->read_pos+5;
  }

928
  if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
929
    thd->variables.sql_mode|= MODE_IGNORE_SPACE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
930
#ifdef HAVE_OPENSSL
931
  DBUG_PRINT("info", ("client capabilities: %d", thd->client_capabilities));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
932 933 934
  if (thd->client_capabilities & CLIENT_SSL)
  {
    /* Do the SSL layering. */
935 936 937 938 939
    if (!ssl_acceptor_fd)
    {
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
940
    DBUG_PRINT("info", ("IO layer change in progress..."));
941 942
    if (sslaccept(ssl_acceptor_fd, net->vio, thd->variables.net_wait_timeout))
    {
943
      DBUG_PRINT("error", ("Failed to accept new SSL connection"));
944
      inc_host_errors(&thd->remote.sin_addr);
peter@mysql.com's avatar
peter@mysql.com committed
945
      return(ER_HANDSHAKE_ERROR);
946
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
947
    DBUG_PRINT("info", ("Reading user information over SSL layer"));
948
    if ((pkt_len= my_net_read(net)) == packet_error ||
bk@work.mysql.com's avatar
bk@work.mysql.com committed
949 950
	pkt_len < NORMAL_HANDSHAKE_SIZE)
    {
951 952
      DBUG_PRINT("error", ("Failed to read user information (pkt_len= %lu)",
			   pkt_len));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
953 954 955 956
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
  }
957 958 959
#endif

  if (end >= (char*) net->read_pos+ pkt_len +2)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
960
  {
961 962
    inc_host_errors(&thd->remote.sin_addr);
    return(ER_HANDSHAKE_ERROR);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
963 964 965
  }

  if (thd->client_capabilities & CLIENT_INTERACTIVE)
966
    thd->variables.net_wait_timeout= thd->variables.net_interactive_timeout;
967
  if ((thd->client_capabilities & CLIENT_TRANSACTIONS) &&
968 969
      opt_using_transactions)
    net->return_status= &thd->server_status;
970
  net->read_timeout=(uint) thd->variables.net_read_timeout;
peter@mysql.com's avatar
peter@mysql.com committed
971

972 973
  char *user= end;
  char *passwd= strend(user)+1;
974
  char *db= passwd;
975
  char db_buff[NAME_LEN+1];                     // buffer to store db in utf8
976
  char user_buff[USERNAME_LENGTH+1];		// buffer to store user in utf8
977 978 979
  uint dummy_errors;

  /*
980 981 982 983
    Old clients send null-terminated string as password; new clients send
    the size (1 byte) + string (not null-terminated). Hence in case of empty
    password both send '\0'.
  */
984
  uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ?
985 986 987
    *passwd++ : strlen(passwd);
  db= thd->client_capabilities & CLIENT_CONNECT_WITH_DB ?
    db + passwd_len + 1 : 0;
peter@mysql.com's avatar
peter@mysql.com committed
988

kostja@oak.local's avatar
kostja@oak.local committed
989 990
  /* Since 4.1 all database names are stored in utf8 */
  if (db)
peter@mysql.com's avatar
peter@mysql.com committed
991
  {
992 993 994
    db_buff[copy_and_convert(db_buff, sizeof(db_buff)-1,
                             system_charset_info,
                             db, strlen(db),
995
                             thd->charset(), &dummy_errors)]= 0;
996
    db= db_buff;
kostja@oak.local's avatar
kostja@oak.local committed
997
  }
peter@mysql.com's avatar
peter@mysql.com committed
998

999 1000 1001 1002
  user_buff[copy_and_convert(user_buff, sizeof(user_buff)-1,
                             system_charset_info, user, strlen(user),
                             thd->charset(), &dummy_errors)]= '\0';
  user= user_buff;
1003

1004 1005 1006
  if (thd->main_security_ctx.user)
    x_free(thd->main_security_ctx.user);
  if (!(thd->main_security_ctx.user= my_strdup(user, MYF(0))))
1007
    return (ER_OUT_OF_RESOURCES);
1008
  return check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1009 1010
}

1011

1012 1013
void execute_init_command(THD *thd, sys_var_str *init_command_var,
			  rw_lock_t *var_mutex)
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1014 1015 1016 1017
{
  Vio* save_vio;
  ulong save_client_capabilities;

1018 1019 1020 1021 1022 1023 1024 1025 1026
  thd->proc_info= "Execution of init_command";
  /*
    We need to lock init_command_var because
    during execution of init_command_var query
    values of init_command_var can't be changed
  */
  rw_rdlock(var_mutex);
  thd->query= init_command_var->value;
  thd->query_length= init_command_var->value_length;
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1027 1028
  save_client_capabilities= thd->client_capabilities;
  thd->client_capabilities|= CLIENT_MULTI_QUERIES;
1029 1030 1031 1032
  /*
    We don't need return result of execution to client side.
    To forbid this we should set thd->net.vio to 0.
  */
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1033 1034
  save_vio= thd->net.vio;
  thd->net.vio= 0;
1035
  thd->net.no_send_error= 0;
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1036
  dispatch_command(COM_QUERY, thd, thd->query, thd->query_length+1);
1037
  rw_unlock(var_mutex);
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1038 1039 1040 1041 1042
  thd->client_capabilities= save_client_capabilities;
  thd->net.vio= save_vio;
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
1043 1044 1045 1046
pthread_handler_decl(handle_one_connection,arg)
{
  THD *thd=(THD*) arg;
  uint launch_time  =
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1047
    (uint) ((thd->thr_create_time = time(NULL)) - thd->connect_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1048 1049 1050 1051 1052
  if (launch_time >= slow_launch_time)
    statistic_increment(slow_launch_threads,&LOCK_status );

  pthread_detach_this_thread();

1053
#if !defined( __WIN__) && !defined(OS2)	// Win32 calls this in pthread_create
monty@mysql.com's avatar
monty@mysql.com committed
1054
  /* The following calls needs to be done before we call DBUG_ macros */
1055
  if (!(test_flags & TEST_NO_THREADS) & my_thread_init())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1056
  {
1057
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
1058
    statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1059 1060 1061 1062 1063
    end_thread(thd,0);
    return 0;
  }
#endif

1064 1065 1066 1067 1068 1069 1070
  /*
    handle_one_connection() is the only way a thread would start
    and would always be on top of the stack, therefore, the thread
    stack always starts at the address of the first local variable
    of handle_one_connection, which is thd. We need to know the
    start of the stack so that we could check for stack overruns.
  */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1071 1072
  DBUG_PRINT("info", ("handle_one_connection called by thread %d\n",
		      thd->thread_id));
monty@mysql.com's avatar
monty@mysql.com committed
1073
  /* now that we've called my_thread_init(), it is safe to call DBUG_* */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1074

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1075
#if defined(__WIN__)
1076
  init_signals();
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1077
#elif !defined(OS2) && !defined(__NETWARE__)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1078 1079 1080 1081 1082 1083
  sigset_t set;
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
  if (thd->store_globals())
  {
1084
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
1085
    statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1086 1087 1088 1089 1090 1091 1092 1093
    end_thread(thd,0);
    return 0;
  }

  do
  {
    int error;
    NET *net= &thd->net;
1094
    Security_context *sctx= thd->security_ctx;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1095
    thd->thread_stack= (char*) &thd;
1096
    net->no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1097

1098
    if ((error=check_connection(thd)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1099 1100
    {						// Wrong permissions
      if (error > 0)
1101
	net_printf_error(thd, error, sctx->host_or_ip);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1102 1103
#ifdef __NT__
      if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
1104
	my_sleep(1000);				/* must wait after eof() */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1105
#endif
1106
      statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1107 1108
      goto end_thread;
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1109
#ifdef __NETWARE__
1110
    netware_reg_user(sctx->ip, sctx->user, "MySQL");
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1111
#endif
1112
    if (thd->variables.max_join_size == HA_POS_ERROR)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1113 1114 1115 1116
      thd->options |= OPTION_BIG_SELECTS;
    if (thd->client_capabilities & CLIENT_COMPRESS)
      net->compress=1;				// Use compression

gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1117
    thd->version= refresh_version;
1118
    thd->proc_info= 0;
1119
    thd->command= COM_SLEEP;
1120 1121
    thd->set_time();
    thd->init_for_queries();
monty@mysql.com's avatar
monty@mysql.com committed
1122

1123
    if (sys_init_connect.value_length && !(sctx->master_access & SUPER_ACL))
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1124
    {
1125 1126
      execute_init_command(thd, &sys_init_connect, &LOCK_sys_init_connect);
      if (thd->query_error)
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
1127
	thd->killed= THD::KILL_CONNECTION;
1128 1129 1130
      thd->proc_info=0;
      thd->set_time();
      thd->init_for_queries();
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1131 1132
    }

1133 1134
    while (!net->error && net->vio != 0 &&
           !(thd->killed == THD::KILL_CONNECTION))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1135
    {
1136
      net->no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1137 1138 1139
      if (do_command(thd))
	break;
    }
1140 1141
    if (thd->user_connect)
      decrease_user_connections(thd->user_connect);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1142
    if (net->error && net->vio != 0 && net->report_error)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1143
    {
1144
      if (!thd->killed && thd->variables.log_warnings > 1)
monty@mysql.com's avatar
monty@mysql.com committed
1145
	sql_print_warning(ER(ER_NEW_ABORTING_CONNECTION),
serg@serg.mylan's avatar
serg@serg.mylan committed
1146
                          thd->thread_id,(thd->db ? thd->db : "unconnected"),
1147 1148
                          sctx->user ? sctx->user : "unauthenticated",
                          sctx->host_or_ip,
serg@serg.mylan's avatar
serg@serg.mylan committed
1149 1150
                          (net->last_errno ? ER(net->last_errno) :
                           ER(ER_UNKNOWN_ERROR)));
1151
      net_send_error(thd, net->last_errno, NullS);
1152
      statistic_increment(aborted_threads,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1153
    }
1154 1155 1156 1157
    else if (thd->killed)
    {
      statistic_increment(aborted_threads,&LOCK_status);
    }
1158
    
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1159
end_thread:
1160
    close_connection(thd, 0, 1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
    end_thread(thd,1);
    /*
      If end_thread returns, we are either running with --one-thread
      or this thread has been schedule to handle the next query
    */
    thd= current_thd;
  } while (!(test_flags & TEST_NO_THREADS));
  /* The following is only executed if we are not using --one-thread */
  return(0);					/* purecov: deadcode */
}

hf@deer.(none)'s avatar
hf@deer.(none) committed
1172 1173
#endif /* EMBEDDED_LIBRARY */

1174 1175 1176 1177
/*
  Execute commands from bootstrap_file.
  Used when creating the initial grant tables
*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1178

1179
extern "C" pthread_handler_decl(handle_bootstrap,arg)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1180
{
1181 1182 1183
  THD *thd=(THD*) arg;
  FILE *file=bootstrap_file;
  char *buff;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1184

1185
  /* The following must be called before DBUG_ENTER */
1186
  if (my_thread_init() || thd->store_globals())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1187
  {
hf@deer.(none)'s avatar
hf@deer.(none) committed
1188
#ifndef EMBEDDED_LIBRARY
1189
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1190
#endif
1191
    thd->fatal_error();
1192
    goto end;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1193
  }
1194 1195
  DBUG_ENTER("handle_bootstrap");

hf@deer.(none)'s avatar
hf@deer.(none) committed
1196
#ifndef EMBEDDED_LIBRARY
1197 1198
  pthread_detach_this_thread();
  thd->thread_stack= (char*) &thd;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1199
#if !defined(__WIN__) && !defined(OS2) && !defined(__NETWARE__)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1200
  sigset_t set;
1201 1202
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1203
#endif
hf@deer.(none)'s avatar
hf@deer.(none) committed
1204
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1205

1206
  if (thd->variables.max_join_size == HA_POS_ERROR)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1207 1208 1209 1210
    thd->options |= OPTION_BIG_SELECTS;

  thd->proc_info=0;
  thd->version=refresh_version;
1211 1212
  thd->security_ctx->priv_user=
    thd->security_ctx->user= (char*) my_strdup("boot", MYF(MY_WME));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1213

1214
  buff= (char*) thd->net.buff;
1215
  thd->init_for_queries();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1216 1217
  while (fgets(buff, thd->net.max_packet, file))
  {
monty@mishka.local's avatar
monty@mishka.local committed
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
   ulong length= (ulong) strlen(buff);
   while (buff[length-1] != '\n' && !feof(file))
   {
     /*
       We got only a part of the current string. Will try to increase
       net buffer then read the rest of the current string.
     */
     if (net_realloc(&(thd->net), 2 * thd->net.max_packet))
     {
       net_send_error(thd, ER_NET_PACKET_TOO_LARGE, NullS);
       thd->fatal_error();
       break;
     }
     buff= (char*) thd->net.buff;
     fgets(buff + length, thd->net.max_packet - length, file);
     length+= (ulong) strlen(buff + length);
   }
   if (thd->is_fatal_error)
     break;

1238
    while (length && (my_isspace(thd->charset(), buff[length-1]) ||
1239
           buff[length-1] == ';'))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1240 1241
      length--;
    buff[length]=0;
1242
    thd->query_length=length;
1243 1244
    thd->query= thd->memdup_w_gap(buff, length+1, 
				  thd->db_length+1+QUERY_CACHE_FLAGS_SIZE);
1245
    thd->query[length] = '\0';
1246 1247 1248 1249
    /*
      We don't need to obtain LOCK_thread_count here because in bootstrap
      mode we have only one thread.
    */
1250
    thd->query_id=next_query_id();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1251 1252
    mysql_parse(thd,thd->query,length);
    close_thread_tables(thd);			// Free tables
1253
    if (thd->is_fatal_error)
1254
      break;
1255
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
1256
#ifdef USING_TRANSACTIONS
1257
    free_root(&thd->transaction.mem_root,MYF(MY_KEEP_PREALLOC));
1258
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1259
  }
1260 1261 1262

  /* thd->fatal_error should be set in case something went wrong */
end:
1263 1264 1265 1266 1267 1268
  bootstrap_error= thd->is_fatal_error;

  net_end(&thd->net);
  thd->cleanup();
  delete thd;

hf@deer.(none)'s avatar
hf@deer.(none) committed
1269
#ifndef EMBEDDED_LIBRARY
1270 1271 1272
  (void) pthread_mutex_lock(&LOCK_thread_count);
  thread_count--;
  (void) pthread_mutex_unlock(&LOCK_thread_count);
1273
  (void) pthread_cond_broadcast(&COND_thread_count);
1274 1275
  my_thread_end();
  pthread_exit(0);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1276
#endif
1277
  DBUG_RETURN(0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1278 1279
}

1280
    /* This works because items are allocated with sql_alloc() */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1281

1282
void free_items(Item *item)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1283
{
1284
  Item *next;
monty@mysql.com's avatar
monty@mysql.com committed
1285
  DBUG_ENTER("free_items");
1286 1287 1288
  for (; item ; item=next)
  {
    next=item->next;
1289
    item->delete_self();
1290
  }
monty@mysql.com's avatar
monty@mysql.com committed
1291
  DBUG_VOID_RETURN;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1292 1293
}

1294 1295 1296 1297
    /* This works because items are allocated with sql_alloc() */

void cleanup_items(Item *item)
{
monty@mysql.com's avatar
monty@mysql.com committed
1298
  DBUG_ENTER("cleanup_items");  
1299 1300
  for (; item ; item=item->next)
    item->cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
1301
  DBUG_VOID_RETURN;
1302 1303
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1304 1305 1306 1307 1308 1309 1310
int mysql_table_dump(THD* thd, char* db, char* tbl_name, int fd)
{
  TABLE* table;
  TABLE_LIST* table_list;
  int error = 0;
  DBUG_ENTER("mysql_table_dump");
  db = (db && db[0]) ? db : thd->db;
1311
  if (!(table_list = (TABLE_LIST*) thd->calloc(sizeof(TABLE_LIST))))
1312
    DBUG_RETURN(1); // out of memory
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
1313
  table_list->db= db;
1314
  table_list->table_name= table_list->alias= tbl_name;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
1315 1316
  table_list->lock_type= TL_READ_NO_INSERT;
  table_list->prev_global= &table_list;	// can be removed after merge with 4.1
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1317

1318 1319
  if (!db || check_db_name(db))
  {
1320
    my_error(ER_WRONG_DB_NAME ,MYF(0), db ? db : "NULL");
1321 1322
    goto err;
  }
1323
  if (lower_case_table_names)
1324
    my_casedn_str(files_charset_info, tbl_name);
1325
  remove_escape(table_list->table_name);
1326 1327 1328 1329

  if (!(table=open_ltable(thd, table_list, TL_READ_NO_INSERT)))
    DBUG_RETURN(1);

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1330
  if (check_one_table_access(thd, SELECT_ACL, table_list))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1331 1332
    goto err;
  thd->free_list = 0;
1333
  thd->query_length=(uint) strlen(tbl_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1334
  thd->query = tbl_name;
1335
  if ((error = mysqld_dump_create_info(thd, table_list, -1)))
1336
  {
1337
    my_error(ER_GET_ERRNO, MYF(0), my_errno);
1338 1339
    goto err;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1340
  net_flush(&thd->net);
1341
  if ((error= table->file->dump(thd,fd)))
1342
    my_error(ER_GET_ERRNO, MYF(0), error);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1343

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1344
err:
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1345
  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1346 1347
}

1348 1349 1350 1351
/*
  Ends the current transaction and (maybe) begin the next

  SYNOPSIS
1352
    end_trans()
1353 1354 1355 1356 1357 1358 1359
      thd            Current thread
      completion     Completion type

  RETURN
    0 - OK
*/

1360
int end_trans(THD *thd, enum enum_mysql_completiontype completion)
1361 1362 1363
{
  bool do_release= 0;
  int res= 0;
1364
  DBUG_ENTER("end_trans");
1365

1366
  if (unlikely(thd->in_sub_stmt))
1367 1368 1369 1370
  {
    my_error(ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0));
    DBUG_RETURN(1);
  }
1371 1372 1373 1374 1375 1376 1377 1378
  switch (completion) {
  case COMMIT:
    /*
     We don't use end_active_trans() here to ensure that this works
     even if there is a problem with the OPTION_AUTO_COMMIT flag
     (Which of course should never happen...)
    */
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
1379
    res= ha_commit(thd);
1380
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
1381 1382
    break;
  case COMMIT_RELEASE:
serg@serg.mylan's avatar
serg@serg.mylan committed
1383
    do_release= 1; /* fall through */
1384 1385 1386 1387 1388 1389
  case COMMIT_AND_CHAIN:
    res= end_active_trans(thd);
    if (!res && completion == COMMIT_AND_CHAIN)
      res= begin_trans(thd);
    break;
  case ROLLBACK_RELEASE:
serg@serg.mylan's avatar
serg@serg.mylan committed
1390
    do_release= 1; /* fall through */
1391 1392 1393 1394
  case ROLLBACK:
  case ROLLBACK_AND_CHAIN:
  {
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
serg@serg.mylan's avatar
serg@serg.mylan committed
1395
    if (ha_rollback(thd))
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406
      res= -1;
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    if (!res && (completion == ROLLBACK_AND_CHAIN))
      res= begin_trans(thd);
    break;
  }
  default:
    res= -1;
    my_error(ER_UNKNOWN_COM_ERROR, MYF(0));
    DBUG_RETURN(-1);
  }
serg@serg.mylan's avatar
serg@serg.mylan committed
1407

1408 1409 1410
  if (res < 0)
    my_error(thd->killed_errno(), MYF(0));
  else if ((res == 0) && do_release)
serg@serg.mylan's avatar
serg@serg.mylan committed
1411 1412
    thd->killed= THD::KILL_CONNECTION;

1413 1414
  DBUG_RETURN(res);
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1415

1416
#ifndef EMBEDDED_LIBRARY
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427

/*
  Read one command from socket and execute it (query or simple command).
  This function is called in loop from thread function.
  SYNOPSIS
    do_command()
  RETURN VALUE
    0  success
    1  request of thread shutdown (see dispatch_command() description)
*/

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1428 1429 1430
bool do_command(THD *thd)
{
  char *packet;
1431 1432
  uint old_timeout;
  ulong packet_length;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1433 1434 1435 1436 1437
  NET *net;
  enum enum_server_command command;
  DBUG_ENTER("do_command");

  net= &thd->net;
1438 1439 1440 1441
  /*
    indicator of uninitialized lex => normal flow of errors handling
    (see my_message_sql)
  */
1442
  thd->lex->current_select= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1443 1444

  packet=0;
1445
  old_timeout=net->read_timeout;
monty@mysql.com's avatar
monty@mysql.com committed
1446
  /* Wait max for 8 hours */
1447
  net->read_timeout=(uint) thd->variables.net_wait_timeout;
1448
  thd->clear_error();				// Clear error message
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1449 1450 1451 1452

  net_new_transaction(net);
  if ((packet_length=my_net_read(net)) == packet_error)
  {
1453 1454 1455 1456 1457
    DBUG_PRINT("info",("Got error %d reading command from socket %s",
		       net->error,
		       vio_description(net->vio)));
    /* Check if we can continue without closing the connection */
    if (net->error != 3)
1458 1459
    {
      statistic_increment(aborted_threads,&LOCK_status);
1460
      DBUG_RETURN(TRUE);			// We have to close it.
1461
    }
1462
    net_send_error(thd, net->last_errno, NullS);
1463
    net->error= 0;
1464
    DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1465 1466 1467 1468 1469
  }
  else
  {
    packet=(char*) net->read_pos;
    command = (enum enum_server_command) (uchar) packet[0];
1470 1471
    if (command >= COM_END)
      command= COM_END;				// Wrong command
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1472 1473 1474
    DBUG_PRINT("info",("Command on %s = %d (%s)",
		       vio_description(net->vio), command,
		       command_name[command]));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1475
  }
1476
  net->read_timeout=old_timeout;		// restore it
1477 1478 1479 1480 1481 1482 1483 1484 1485
  /*
    packet_length contains length of data, as it was stored in packet
    header. In case of malformed header, packet_length can be zero.
    If packet_length is not zero, my_net_read ensures that this number
    of bytes was actually read from network. Additionally my_net_read
    sets packet[packet_length]= 0 (thus if packet_length == 0,
    command == packet[0] == COM_SLEEP).
    In dispatch_command packet[packet_length] points beyond the end of packet.
  */
1486
  DBUG_RETURN(dispatch_command(command,thd, packet+1, (uint) packet_length));
1487
}
1488
#endif  /* EMBEDDED_LIBRARY */
1489

1490

1491 1492
/*
   Perform one connection-level (COM_XXXX) command.
1493

1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506
  SYNOPSIS
    dispatch_command()
    thd             connection handle
    command         type of command to perform 
    packet          data for the command, packet is always null-terminated
    packet_length   length of packet + 1 (to show that data is
                    null-terminated) except for COM_SLEEP, where it
                    can be zero.
  RETURN VALUE
    0   ok
    1   request of thread shutdown, i. e. if command is
        COM_QUIT/COM_SHUTDOWN
*/
1507

1508 1509 1510 1511
bool dispatch_command(enum enum_server_command command, THD *thd,
		      char* packet, uint packet_length)
{
  NET *net= &thd->net;
1512
  bool error= 0;
1513 1514
  DBUG_ENTER("dispatch_command");

1515 1516 1517
  if (thd->killed == THD::KILL_QUERY || thd->killed == THD::KILL_BAD_DATA)
    thd->killed= THD::NOT_KILLED;

1518
  thd->command=command;
1519
  /*
1520 1521
    Commands which always take a long time are logged into
    the slow log only if opt_log_slow_admin_statements is set.
1522
  */
1523
  thd->enable_slow_log= TRUE;
1524
  thd->lex->sql_command= SQLCOM_END; /* to avoid confusing VIEW detectors */
1525
  thd->set_time();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1526 1527 1528
  VOID(pthread_mutex_lock(&LOCK_thread_count));
  thd->query_id=query_id;
  if (command != COM_STATISTICS && command != COM_PING)
1529
    next_query_id();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1530
  thread_running++;
1531
  /* TODO: set thd->lex->sql_command to SQLCOM_END here */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1532
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
1533

1534 1535
  thd->server_status&=
           ~(SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED);
1536
  switch (command) {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1537
  case COM_INIT_DB:
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1538 1539
  {
    LEX_STRING tmp;
1540 1541
    statistic_increment(thd->status_var.com_stat[SQLCOM_CHANGE_DB],
			&LOCK_status);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1542 1543
    thd->convert_string(&tmp, system_charset_info,
			packet, strlen(packet), thd->charset());
1544 1545
    if (!mysql_change_db(thd, tmp.str, FALSE))
    {
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1546
      mysql_log.write(thd,command,"%s",thd->db);
1547 1548
      send_ok(thd);
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1549 1550
    break;
  }
1551
#ifdef HAVE_REPLICATION
1552 1553
  case COM_REGISTER_SLAVE:
  {
1554
    if (!register_slave(thd, (uchar*)packet, packet_length))
1555
      send_ok(thd);
1556 1557
    break;
  }
1558
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1559
  case COM_TABLE_DUMP:
1560 1561 1562 1563 1564
  {
    char *db, *tbl_name;
    uint db_len= *(uchar*) packet;
    uint tbl_len= *(uchar*) (packet + db_len + 1);

1565
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1566
    thd->enable_slow_log= opt_log_slow_admin_statements;
1567 1568 1569
    db= thd->alloc(db_len + tbl_len + 2);
    tbl_name= strmake(db, packet + 1, db_len)+1;
    strmake(tbl_name, packet + db_len + 2, tbl_len);
1570
    mysql_table_dump(thd, db, tbl_name, -1);
1571 1572
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1573 1574
  case COM_CHANGE_USER:
  {
1575
    thd->change_user();
1576
    thd->clear_error();                         // if errors from rollback
1577

1578
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1579
    char *user= (char*) packet;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1580
    char *passwd= strend(user)+1;
1581 1582 1583 1584 1585
    /* 
      Old clients send null-terminated string ('\0' for empty string) for
      password.  New clients send the size (1 byte) + string (not null
      terminated, so also '\0' for empty string).
    */
1586
    char db_buff[NAME_LEN+1];                 // buffer to store db in utf8 
1587 1588 1589 1590
    char *db= passwd;
    uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ? 
      *passwd++ : strlen(passwd);
    db+= passwd_len + 1;
1591
#ifndef EMBEDDED_LIBRARY
1592
    /* Small check for incoming packet */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1593
    if ((uint) ((uchar*) db - net->read_pos) > packet_length)
1594
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1595
      my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
1596 1597
      break;
    }
1598
#endif
1599
    /* Convert database name to utf8 */
1600
    uint dummy_errors;
1601 1602
    db_buff[copy_and_convert(db_buff, sizeof(db_buff)-1,
                             system_charset_info, db, strlen(db),
1603
                             thd->charset(), &dummy_errors)]= 0;
1604
    db= db_buff;
peter@mysql.com's avatar
peter@mysql.com committed
1605

1606 1607 1608
    /* Save user and privileges */
    uint save_db_length= thd->db_length;
    char *save_db= thd->db;
1609
    Security_context save_security_ctx= *thd->security_ctx;
1610
    USER_CONN *save_user_connect= thd->user_connect;
1611 1612

    if (!(thd->security_ctx->user= my_strdup(user, MYF(0))))
1613
    {
1614
      thd->security_ctx->user= save_security_ctx.user;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1615
      my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
1616 1617
      break;
    }
peter@mysql.com's avatar
peter@mysql.com committed
1618

1619 1620
    /* Clear variables that are allocated */
    thd->user_connect= 0;
monty@mysql.com's avatar
monty@mysql.com committed
1621
    int res= check_user(thd, COM_CHANGE_USER, passwd, passwd_len, db, FALSE);
peter@mysql.com's avatar
peter@mysql.com committed
1622

1623 1624
    if (res)
    {
1625
      /* authentication failure, we shall restore old user */
1626
      if (res > 0)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1627
        my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
1628 1629
      x_free(thd->security_ctx->user);
      *thd->security_ctx= save_security_ctx;
1630
      thd->user_connect= save_user_connect;
1631 1632 1633 1634 1635 1636
      thd->db= save_db;
      thd->db_length= save_db_length;
    }
    else
    {
      /* we've authenticated new user */
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
1637 1638
      if (save_user_connect)
	decrease_user_connections(save_user_connect);
1639
      x_free((gptr) save_db);
1640
      x_free((gptr)  save_security_ctx.user);
1641
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1642 1643
    break;
  }
1644
  case COM_STMT_EXECUTE:
1645
  {
1646
    mysql_stmt_execute(thd, packet, packet_length);
1647 1648
    break;
  }
1649
  case COM_STMT_FETCH:
1650 1651 1652 1653
  {
    mysql_stmt_fetch(thd, packet, packet_length);
    break;
  }
1654
  case COM_STMT_SEND_LONG_DATA:
1655
  {
1656
    mysql_stmt_get_longdata(thd, packet, packet_length);
1657 1658
    break;
  }
1659
  case COM_STMT_PREPARE:
1660
  {
1661
    mysql_stmt_prepare(thd, packet, packet_length);
1662 1663
    break;
  }
1664
  case COM_STMT_CLOSE:
1665
  {
1666
    mysql_stmt_close(thd, packet);
1667 1668
    break;
  }
1669
  case COM_STMT_RESET:
1670 1671 1672 1673
  {
    mysql_stmt_reset(thd, packet);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1674 1675
  case COM_QUERY:
  {
1676 1677
    if (alloc_query(thd, packet, packet_length))
      break;					// fatal error is set
1678
    char *packet_end= thd->query + thd->query_length;
1679
    mysql_log.write(thd,command,"%s",thd->query);
1680
    DBUG_PRINT("query",("%-.4096s",thd->query));
1681 1682 1683 1684

    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),QUERY_PRIOR);

1685
    mysql_parse(thd,thd->query, thd->query_length);
1686

1687
    while (!thd->killed && thd->lex->found_semicolon && !thd->net.report_error)
1688
    {
1689
      char *packet= thd->lex->found_semicolon;
1690
      net->no_send_error= 0;
1691
      /*
1692
        Multiple queries exits, execute them individually
1693
	in embedded server - just store them to be executed later 
1694
      */
1695
#ifndef EMBEDDED_LIBRARY
1696 1697
      if (thd->lock || thd->open_tables || thd->derived_tables ||
          thd->prelocked_mode)
1698
        close_thread_tables(thd);
1699
#endif
1700
      ulong length= (ulong)(packet_end-packet);
1701

1702
      log_slow_statement(thd);
1703

1704
      /* Remove garbage at start of query */
1705
      while (my_isspace(thd->charset(), *packet) && length > 0)
1706 1707 1708 1709
      {
        packet++;
        length--;
      }
monty@mysql.com's avatar
monty@mysql.com committed
1710
      VOID(pthread_mutex_lock(&LOCK_thread_count));
1711
      thd->query_length= length;
1712
      thd->query= packet;
1713
      thd->query_id= next_query_id();
1714
      thd->set_time(); /* Reset the query start time. */
1715
      /* TODO: set thd->lex->sql_command to SQLCOM_END here */
1716
      VOID(pthread_mutex_unlock(&LOCK_thread_count));
1717
#ifndef EMBEDDED_LIBRARY
1718
      mysql_parse(thd, packet, length);
1719
#else
hf@deer.(none)'s avatar
hf@deer.(none) committed
1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
      /*
	'packet' can point inside the query_rest's buffer
	so we have to do memmove here
       */
      if (thd->query_rest.length() > length)
      {
	memmove(thd->query_rest.c_ptr(), packet, length);
	thd->query_rest.length(length);
      }
      else
1730
	thd->query_rest.copy(packet, length, thd->query_rest.charset());
1731 1732 1733

      thd->server_status&= ~ (SERVER_QUERY_NO_INDEX_USED |
                              SERVER_QUERY_NO_GOOD_INDEX_USED);
1734 1735
      break;
#endif /*EMBEDDED_LIBRARY*/
1736 1737
    }

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1738 1739 1740 1741 1742
    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),WAIT_PRIOR);
    DBUG_PRINT("info",("query ready"));
    break;
  }
1743
  case COM_FIELD_LIST:				// This isn't actually needed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1744
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1745 1746
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0));	/* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1747 1748 1749
    break;
#else
  {
1750
    char *fields, *pend;
1751 1752
    /* Locked closure of all tables */
    TABLE_LIST *locked_tables= NULL;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1753
    TABLE_LIST table_list;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1754
    LEX_STRING conv_name;
1755
    /* Saved variable value */
1756 1757
    my_bool old_innodb_table_locks= 
              IF_INNOBASE_DB(thd->variables.innodb_table_locks, FALSE);
1758

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1759

1760 1761
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_FIELDS],
			&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1762 1763 1764
    bzero((char*) &table_list,sizeof(table_list));
    if (!(table_list.db=thd->db))
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1765
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1766 1767
      break;
    }
1768
    pend= strend(packet);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1769 1770
    thd->convert_string(&conv_name, system_charset_info,
			packet, (uint) (pend-packet), thd->charset());
1771
    table_list.alias= table_list.table_name= conv_name.str;
1772
    packet= pend+1;
1773 1774 1775 1776 1777 1778 1779 1780 1781

    if (!my_strcasecmp(system_charset_info, table_list.db,
                       information_schema_name.str))
    {
      ST_SCHEMA_TABLE *schema_table= find_schema_table(thd, table_list.alias);
      if (schema_table)
        table_list.schema_table= schema_table;
    }

1782
    thd->query_length= strlen(packet);       // for simplicity: don't optimize
1783 1784
    if (!(thd->query=fields=thd->memdup(packet,thd->query_length+1)))
      break;
1785
    mysql_log.write(thd,command,"%s %s",table_list.table_name, fields);
1786
    if (lower_case_table_names)
1787 1788
      my_casedn_str(files_charset_info, table_list.table_name);
    remove_escape(table_list.table_name);	// This can't have wildcards
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1789

monty@mysql.com's avatar
monty@mysql.com committed
1790
    if (check_access(thd,SELECT_ACL,table_list.db,&table_list.grant.privilege,
1791
		     0, 0, test(table_list.schema_table)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1792
      break;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1793 1794
    if (grant_option &&
	check_grant(thd, SELECT_ACL, &table_list, 2, UINT_MAX, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1795
      break;
1796 1797 1798 1799 1800 1801
    /* init structures for VIEW processing */
    table_list.select_lex= &(thd->lex->select_lex);
    mysql_init_query(thd, (uchar*)"", 0);
    thd->lex->
      select_lex.table_list.link_in_list((byte*) &table_list,
                                         (byte**) &table_list.next_local);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
1802
    thd->lex->add_to_query_tables(&table_list);
1803

1804 1805
    /* switch on VIEW optimisation: do not fill temporary tables */
    thd->lex->sql_command= SQLCOM_SHOW_FIELDS;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1806
    mysqld_list_fields(thd,&table_list,fields);
1807
    thd->lex->unit.cleanup();
1808
    thd->cleanup_after_query();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1809 1810 1811 1812
    break;
  }
#endif
  case COM_QUIT:
1813
    /* We don't calculate statistics for this command */
1814
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1815 1816 1817 1818
    net->error=0;				// Don't give 'abort' message
    error=TRUE;					// End server
    break;

1819
  case COM_CREATE_DB:				// QQ: To be removed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1820
    {
1821
      char *db=thd->strdup(packet), *alias;
1822
      HA_CREATE_INFO create_info;
1823

1824 1825
      statistic_increment(thd->status_var.com_stat[SQLCOM_CREATE_DB],
			  &LOCK_status);
1826
      // null test to handle EOM
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
1827
      if (!db || !(alias= thd->strdup(db)) || check_db_name(db))
1828
      {
1829
	my_error(ER_WRONG_DB_NAME, MYF(0), db ? db : "NULL");
1830 1831
	break;
      }
1832
      if (check_access(thd,CREATE_ACL,db,0,1,0,is_schema_db(db)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1833
	break;
1834
      mysql_log.write(thd,command,packet);
1835
      bzero(&create_info, sizeof(create_info));
1836 1837
      mysql_create_db(thd, (lower_case_table_names == 2 ? alias : db),
                      &create_info, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1838 1839
      break;
    }
1840
  case COM_DROP_DB:				// QQ: To be removed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1841
    {
1842 1843
      statistic_increment(thd->status_var.com_stat[SQLCOM_DROP_DB],
			  &LOCK_status);
1844
      char *db=thd->strdup(packet);
monty@mysql.com's avatar
monty@mysql.com committed
1845
      /*  null test to handle EOM */
1846
      if (!db || check_db_name(db))
1847
      {
1848
	my_error(ER_WRONG_DB_NAME, MYF(0), db ? db : "NULL");
1849 1850
	break;
      }
1851
      if (check_access(thd,DROP_ACL,db,0,1,0,is_schema_db(db)))
1852
	break;
1853 1854
      if (thd->locked_tables || thd->active_transaction())
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1855 1856
	my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                   ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1857
	break;
1858
      }
1859
      mysql_log.write(thd,command,db);
1860
      mysql_rm_db(thd, db, 0, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1861 1862
      break;
    }
1863
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1864 1865
  case COM_BINLOG_DUMP:
    {
monty@mysql.com's avatar
monty@mysql.com committed
1866 1867 1868 1869
      ulong pos;
      ushort flags;
      uint32 slave_server_id;

1870
      statistic_increment(thd->status_var.com_other,&LOCK_status);
1871
      thd->enable_slow_log= opt_log_slow_admin_statements;
1872
      if (check_global_access(thd, REPL_SLAVE_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1873
	break;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1874

1875
      /* TODO: The following has to be changed to an 8 byte integer */
1876 1877
      pos = uint4korr(packet);
      flags = uint2korr(packet + 4);
1878
      thd->server_id=0; /* avoid suicide */
1879
      if ((slave_server_id= uint4korr(packet+6))) // mysqlbinlog.server_id==0
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
1880
	kill_zombie_dump_threads(slave_server_id);
1881
      thd->server_id = slave_server_id;
monty@mysql.com's avatar
monty@mysql.com committed
1882 1883 1884

      mysql_log.write(thd, command, "Log: '%s'  Pos: %ld", packet+10,
                      (long) pos);
1885
      mysql_binlog_send(thd, thd->strdup(packet + 10), (my_off_t) pos, flags);
1886
      unregister_slave(thd,1,1);
monty@mysql.com's avatar
monty@mysql.com committed
1887
      /*  fake COM_QUIT -- if we get here, the thread needs to terminate */
1888 1889
      error = TRUE;
      net->error = 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1890 1891
      break;
    }
1892
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1893
  case COM_REFRESH:
1894 1895 1896 1897 1898 1899
  {
    bool not_used;
    statistic_increment(thd->status_var.com_stat[SQLCOM_FLUSH],
                        &LOCK_status);
    ulong options= (ulong) (uchar) packet[0];
    if (check_global_access(thd,RELOAD_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1900
      break;
1901 1902 1903 1904 1905
    mysql_log.write(thd,command,NullS);
    if (!reload_acl_and_cache(thd, options, (TABLE_LIST*) 0, &not_used))
      send_ok(thd);
    break;
  }
1906
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1907
  case COM_SHUTDOWN:
1908
  {
1909
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1910
    if (check_global_access(thd,SHUTDOWN_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1911
      break; /* purecov: inspected */
1912
    /*
1913 1914 1915 1916
      If the client is < 4.1.3, it is going to send us no argument; then
      packet_length is 1, packet[0] is the end 0 of the packet. Note that
      SHUTDOWN_DEFAULT is 0. If client is >= 4.1.3, the shutdown level is in
      packet[0].
1917
    */
1918 1919
    enum mysql_enum_shutdown_level level=
      (enum mysql_enum_shutdown_level) (uchar) packet[0];
1920
    DBUG_PRINT("quit",("Got shutdown command for level %u", level));
1921 1922 1923 1924 1925 1926 1927
    if (level == SHUTDOWN_DEFAULT)
      level= SHUTDOWN_WAIT_ALL_BUFFERS; // soon default will be configurable
    else if (level != SHUTDOWN_WAIT_ALL_BUFFERS)
    {
      my_error(ER_NOT_SUPPORTED_YET, MYF(0), "this shutdown level");
      break;
    }
1928
    DBUG_PRINT("quit",("Got shutdown command for level %u", level));
1929
    mysql_log.write(thd,command,NullS);
1930
    send_eof(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1931 1932 1933
#ifdef __WIN__
    sleep(1);					// must wait after eof()
#endif
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1934
#ifndef OS2
1935
    send_eof(thd);				// This is for 'quit request'
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1936
#endif
1937
    close_connection(thd, 0, 1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1938 1939 1940 1941
    close_thread_tables(thd);			// Free before kill
    kill_mysql();
    error=TRUE;
    break;
1942
  }
1943
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1944 1945
  case COM_STATISTICS:
  {
1946
    mysql_log.write(thd,command,NullS);
1947 1948
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_STATUS],
			&LOCK_status);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1949
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1950
    char buff[200];
hf@deer.(none)'s avatar
hf@deer.(none) committed
1951 1952 1953
#else
    char *buff= thd->net.last_error;
#endif
1954
    ulong uptime = (ulong) (thd->start_time - start_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1955
    sprintf((char*) buff,
1956
	    "Uptime: %lu  Threads: %d  Questions: %lu  Slow queries: %lu  Opens: %lu  Flush tables: %lu  Open tables: %u  Queries per second avg: %.3f",
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1957
	    uptime,
1958 1959 1960
	    (int) thread_count, (ulong) thd->query_id,
            (ulong) thd->status_var.long_query_count,
	    thd->status_var.opened_tables, refresh_version, cached_tables(),
1961 1962
	    (uptime ? (ulonglong2double(thd->query_id) / (double) uptime) :
	     (double) 0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1963
#ifdef SAFEMALLOC
1964
    if (sf_malloc_cur_memory)				// Using SAFEMALLOC
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1965
      sprintf(strend(buff), "  Memory in use: %ldK  Max memory used: %ldK",
1966 1967
	      (sf_malloc_cur_memory+1023L)/1024L,
	      (sf_malloc_max_memory+1023L)/1024L);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1968 1969
#endif
#ifndef EMBEDDED_LIBRARY
1970
    VOID(my_net_write(net, buff,(uint) strlen(buff)));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1971
    VOID(net_flush(net));
hf@deer.(none)'s avatar
hf@deer.(none) committed
1972
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1973 1974 1975
    break;
  }
  case COM_PING:
1976
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1977
    send_ok(thd);				// Tell client we are alive
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1978 1979
    break;
  case COM_PROCESS_INFO:
1980 1981
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_PROCESSLIST],
			&LOCK_status);
1982 1983
    if (!thd->security_ctx->priv_user[0] &&
        check_global_access(thd, PROCESS_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1984
      break;
1985
    mysql_log.write(thd,command,NullS);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1986
    mysqld_list_processes(thd,
1987 1988
			  thd->security_ctx->master_access & PROCESS_ACL ? 
			  NullS : thd->security_ctx->priv_user, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1989 1990 1991
    break;
  case COM_PROCESS_KILL:
  {
1992
    statistic_increment(thd->status_var.com_stat[SQLCOM_KILL], &LOCK_status);
1993
    ulong id=(ulong) uint4korr(packet);
hf@genie.(none)'s avatar
SCRUM  
hf@genie.(none) committed
1994
    kill_one_thread(thd,id,false);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1995 1996
    break;
  }
1997 1998
  case COM_SET_OPTION:
  {
1999 2000
    statistic_increment(thd->status_var.com_stat[SQLCOM_SET_OPTION],
			&LOCK_status);
2001 2002 2003 2004
    enum_mysql_set_option command= (enum_mysql_set_option) uint2korr(packet);
    switch (command) {
    case MYSQL_OPTION_MULTI_STATEMENTS_ON:
      thd->client_capabilities|= CLIENT_MULTI_STATEMENTS;
2005
      send_eof(thd);
2006 2007 2008
      break;
    case MYSQL_OPTION_MULTI_STATEMENTS_OFF:
      thd->client_capabilities&= ~CLIENT_MULTI_STATEMENTS;
2009
      send_eof(thd);
2010 2011
      break;
    default:
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2012
      my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
2013 2014 2015 2016
      break;
    }
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2017
  case COM_DEBUG:
2018
    statistic_increment(thd->status_var.com_other, &LOCK_status);
2019
    if (check_global_access(thd, SUPER_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2020
      break;					/* purecov: inspected */
2021
    mysql_print_status();
2022
    mysql_log.write(thd,command,NullS);
2023
    send_eof(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2024 2025 2026 2027 2028
    break;
  case COM_SLEEP:
  case COM_CONNECT:				// Impossible here
  case COM_TIME:				// Impossible from client
  case COM_DELAYED_INSERT:
2029
  case COM_END:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2030
  default:
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2031
    my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2032 2033
    break;
  }
2034 2035
  if (thd->lock || thd->open_tables || thd->derived_tables ||
      thd->prelocked_mode)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2036 2037 2038 2039
  {
    thd->proc_info="closing tables";
    close_thread_tables(thd);			/* Free tables */
  }
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
  /*
    assume handlers auto-commit (if some doesn't - transaction handling
    in MySQL should be redesigned to support it; it's a big change,
    and it's not worth it - better to commit explicitly only writing
    transactions, read-only ones should better take care of themselves.
    saves some work in 2pc too)
    see also sql_base.cc - close_thread_tables()
  */
  bzero(&thd->transaction.stmt, sizeof(thd->transaction.stmt));
  if (!thd->active_transaction())
2050
    thd->transaction.xid_state.xid.null();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2051

2052 2053 2054
  /* report error issued during command execution */
  if (thd->killed_errno() && !thd->net.report_error)
    thd->send_kill_message();
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2055
  if (thd->net.report_error)
2056
    net_send_error(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2057

2058
  log_slow_statement(thd);
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073

  thd->proc_info="cleaning up";
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For process list
  thd->proc_info=0;
  thd->command=COM_SLEEP;
  thd->query=0;
  thd->query_length=0;
  thread_running--;
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
  thd->packet.shrink(thd->variables.net_buffer_length);	// Reclaim some memory
  free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
  DBUG_RETURN(error);
}


2074
void log_slow_statement(THD *thd)
2075
{
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086
  time_t start_of_query;

  /*
    The following should never be true with our current code base,
    but better to keep this here so we don't accidently try to log a
    statement in a trigger or stored function
  */
  if (unlikely(thd->in_sub_stmt))
    return;                                     // Don't set time for sub stmt

  start_of_query= thd->start_time;
2087
  thd->end_time();				// Set start time
2088

2089 2090 2091 2092 2093
  /*
    Do not log administrative statements unless the appropriate option is
    set; do not log into slow log if reading from backup.
  */
  if (thd->enable_slow_log && !thd->user_time)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2094
  {
2095 2096
    thd->proc_info="logging slow query";

2097 2098
    if ((ulong) (thd->start_time - thd->time_after_lock) >
	thd->variables.long_query_time ||
2099 2100
	((thd->server_status &
	  (SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED)) &&
2101
	 (specialflag & SPECIAL_LOG_QUERIES_NOT_USING_INDEXES)))
2102
    {
2103
      thd->status_var.long_query_count++;
2104 2105
      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2106 2107 2108
  }
}

2109

2110 2111 2112 2113 2114
int prepare_schema_table(THD *thd, LEX *lex, Table_ident *table_ident,
                         enum enum_schema_tables schema_table_idx)
{
  DBUG_ENTER("prepare_schema_table");
  SELECT_LEX *sel= 0;
2115
  switch (schema_table_idx) {
2116 2117
  case SCH_SCHEMATA:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2118 2119
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0));   /* purecov: inspected */
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129
    DBUG_RETURN(1);
#else
    if ((specialflag & SPECIAL_SKIP_SHOW_DB) &&
	check_global_access(thd, SHOW_DB_ACL))
      DBUG_RETURN(1);
    break;
#endif
  case SCH_TABLE_NAMES:
  case SCH_TABLES:
  case SCH_VIEWS:
2130
  case SCH_TRIGGERS:
2131
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2132 2133
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0)); /* purecov: inspected */
2134 2135 2136 2137 2138 2139
    DBUG_RETURN(1);
#else
    {
      char *db= lex->select_lex.db ? lex->select_lex.db : thd->db;
      if (!db)
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2140 2141
	my_message(ER_NO_DB_ERROR,
                   ER(ER_NO_DB_ERROR), MYF(0)); /* purecov: inspected */
2142 2143 2144 2145 2146
        DBUG_RETURN(1);				/* purecov: inspected */
      }
      remove_escape(db);				// Fix escaped '_'
      if (check_db_name(db))
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2147
        my_error(ER_WRONG_DB_NAME, MYF(0), db);
2148 2149
        DBUG_RETURN(1);
      }
2150 2151
      if (check_access(thd, SELECT_ACL, db, &thd->col_access, 0, 0,
                       is_schema_db(db)))
2152 2153 2154
        DBUG_RETURN(1);			        /* purecov: inspected */
      if (!thd->col_access && check_grant_db(thd,db))
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2155
	my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
2156 2157
                 thd->security_ctx->priv_user, thd->security_ctx->priv_host,
                 db);
2158 2159
	DBUG_RETURN(1);
      }
2160 2161 2162 2163 2164
      /*
        We need to do a copy to make this prepared statement safe if this
        was thd->db
      */
      lex->select_lex.db= thd->strdup(db);
2165 2166 2167 2168 2169 2170
      break;
    }
#endif
  case SCH_COLUMNS:
  case SCH_STATISTICS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2171 2172
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0)); /* purecov: inspected */
2173 2174 2175 2176 2177 2178
    DBUG_RETURN(1);
#else
    if (table_ident)
    {
      TABLE_LIST **query_tables_last= lex->query_tables_last;
      sel= new SELECT_LEX();
2179 2180
      /* 'parent_lex' is used in init_query() so it must be before it. */
      sel->parent_lex= lex;
2181
      sel->init_query();
monty@mishka.local's avatar
monty@mishka.local committed
2182
      if (!sel->add_table_to_list(thd, table_ident, 0, 0, TL_READ, 
2183 2184 2185 2186 2187 2188
                                 (List<String> *) 0, (List<String> *) 0))
        DBUG_RETURN(1);
      lex->query_tables_last= query_tables_last;
      TABLE_LIST *table_list= (TABLE_LIST*) sel->table_list.first;
      char *db= table_list->db;
      remove_escape(db);			// Fix escaped '_'
2189
      remove_escape(table_list->table_name);
2190
      if (check_access(thd,SELECT_ACL | EXTRA_ACL,db,
2191 2192
                       &table_list->grant.privilege, 0, 0,
                       test(table_list->schema_table)))
2193 2194 2195 2196 2197 2198 2199
        DBUG_RETURN(1);				/* purecov: inspected */
      if (grant_option && check_grant(thd, SELECT_ACL, table_list, 2,
                                      UINT_MAX, 0))
        DBUG_RETURN(1);
      break;
    }
#endif
2200 2201 2202
  case SCH_OPEN_TABLES:
  case SCH_VARIABLES:
  case SCH_STATUS:
2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223
  case SCH_PROCEDURES:
  case SCH_CHARSETS:
  case SCH_COLLATIONS:
  case SCH_COLLATION_CHARACTER_SET_APPLICABILITY:
  case SCH_USER_PRIVILEGES:
  case SCH_SCHEMA_PRIVILEGES:
  case SCH_TABLE_PRIVILEGES:
  case SCH_COLUMN_PRIVILEGES:
  case SCH_TABLE_CONSTRAINTS:
  case SCH_KEY_COLUMN_USAGE:
  default:
    break;
  }
  
  SELECT_LEX *select_lex= lex->current_select;
  if (make_schema_select(thd, select_lex, schema_table_idx))
  {
    DBUG_RETURN(1);
  }
  TABLE_LIST *table_list= (TABLE_LIST*) select_lex->table_list.first;
  table_list->schema_select_lex= sel;
2224
  table_list->schema_table_reformed= 1;
2225 2226
  statistic_increment(thd->status_var.com_stat[lex->orig_sql_command],
                      &LOCK_status);
2227 2228 2229 2230
  DBUG_RETURN(0);
}


2231 2232
/*
  Read query from packet and store in thd->query
2233
  Used in COM_QUERY and COM_STMT_PREPARE
2234 2235 2236 2237 2238 2239 2240

  DESCRIPTION
    Sets the following THD variables:
      query
      query_length

  RETURN VALUES
2241 2242
    FALSE ok
    TRUE  error;  In this case thd->fatal_error is set
2243 2244
*/

2245
bool alloc_query(THD *thd, const char *packet, uint packet_length)
2246 2247
{
  packet_length--;				// Remove end null
2248
  /* Remove garbage at start and end of query */
2249
  while (my_isspace(thd->charset(),packet[0]) && packet_length > 0)
2250 2251 2252 2253
  {
    packet++;
    packet_length--;
  }
2254
  const char *pos= packet + packet_length;     // Point at end null
peter@mysql.com's avatar
peter@mysql.com committed
2255
  while (packet_length > 0 &&
2256
	 (pos[-1] == ';' || my_isspace(thd->charset() ,pos[-1])))
2257 2258 2259 2260 2261
  {
    pos--;
    packet_length--;
  }
  /* We must allocate some extra memory for query cache */
monty@mysql.com's avatar
monty@mysql.com committed
2262
  thd->query_length= 0;                        // Extra safety: Avoid races
2263 2264
  if (!(thd->query= (char*) thd->memdup_w_gap((gptr) (packet),
					      packet_length,
2265 2266
					      thd->db_length+ 1 +
					      QUERY_CACHE_FLAGS_SIZE)))
2267
    return TRUE;
2268 2269
  thd->query[packet_length]=0;
  thd->query_length= packet_length;
2270 2271 2272 2273

  /* Reclaim some memory */
  thd->packet.shrink(thd->variables.net_buffer_length);
  thd->convert_buffer.shrink(thd->variables.net_buffer_length);
2274

2275
  return FALSE;
2276 2277
}

2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293
static void reset_one_shot_variables(THD *thd) 
{
  thd->variables.character_set_client=
    global_system_variables.character_set_client;
  thd->variables.collation_connection=
    global_system_variables.collation_connection;
  thd->variables.collation_database=
    global_system_variables.collation_database;
  thd->variables.collation_server=
    global_system_variables.collation_server;
  thd->update_charset();
  thd->variables.time_zone=
    global_system_variables.time_zone;
  thd->one_shot_set= 0;
}

2294

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2295 2296 2297 2298 2299
/****************************************************************************
** mysql_execute_command
** Execute command saved in thd and current_lex->sql_command
****************************************************************************/

2300
bool
2301
mysql_execute_command(THD *thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2302
{
2303
  bool	res= FALSE;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2304
  int result= 0;
2305
  LEX	*lex= thd->lex;
monty@mysql.com's avatar
monty@mysql.com committed
2306
  /* first SELECT_LEX (have special meaning for many of non-SELECTcommands) */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2307
  SELECT_LEX *select_lex= &lex->select_lex;
2308 2309
  bool slave_fake_lock= 0;
  MYSQL_LOCK *fake_prev_lock= 0;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2310
  /* first table of first SELECT_LEX */
monty@mysql.com's avatar
monty@mysql.com committed
2311
  TABLE_LIST *first_table= (TABLE_LIST*) select_lex->table_list.first;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2312 2313 2314
  /* list of all tables in query */
  TABLE_LIST *all_tables;
  /* most outer SELECT_LEX_UNIT of query */
2315
  SELECT_LEX_UNIT *unit= &lex->unit;
2316
  /* Saved variable value */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2317
  DBUG_ENTER("mysql_execute_command");
2318
  thd->net.no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2319

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335
  /*
    In many cases first table of main SELECT_LEX have special meaning =>
    check that it is first table in global list and relink it first in 
    queries_tables list if it is necessary (we need such relinking only
    for queries with subqueries in select list, in this case tables of
    subqueries will go to global list first)

    all_tables will differ from first_table only if most upper SELECT_LEX
    do not contain tables.

    Because of above in place where should be at least one table in most
    outer SELECT_LEX we have following check:
    DBUG_ASSERT(first_table == all_tables);
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
  */
  lex->first_lists_tables_same();
2336
  /* should be assigned after making first tables same */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2337
  all_tables= lex->query_tables;
2338 2339 2340 2341
  /* set context for commands which do not use setup_tables */
  select_lex->
    context.resolve_in_table_list_only((TABLE_LIST*)select_lex->
                                       table_list.first);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2342

2343 2344 2345 2346 2347
  /*
    Reset warning count for each query that uses tables
    A better approach would be to reset this for any commands
    that is not a SHOW command or a select that only access local
    variables, but for now this is probably good enough.
2348
    Don't reset warnings when executing a stored routine.
2349
  */
2350
  if ((all_tables || &lex->select_lex != lex->all_selects_list ||
2351
       lex->sroutines.records) && !thd->spcont ||
2352
      lex->time_zone_tables_used)
monty@mysql.com's avatar
monty@mysql.com committed
2353
    mysql_reset_errors(thd, 0);
2354

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2355
#ifdef HAVE_REPLICATION
2356 2357
  if (thd->slave_thread)
  {
2358
    if (lex->sql_command == SQLCOM_UPDATE_MULTI)
2359 2360 2361
    {
      DBUG_PRINT("info",("need faked locked tables"));
      
2362
      if (check_multi_update_lock(thd))
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373
        goto error;

      /* Fix for replication, the tables are opened and locked,
         now we pretend that we have performed a LOCK TABLES action */
	 
      fake_prev_lock= thd->locked_tables;
      if (thd->lock)
        thd->locked_tables= thd->lock;
      thd->lock= 0;
      slave_fake_lock= 1;
    }
peter@mysql.com's avatar
peter@mysql.com committed
2374
    /*
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2375
      Skip if we are in the slave thread, some table rules have been
2376
      given and the table list says the query should not be replicated.
2377 2378 2379

      Exceptions are:
      - SET: we always execute it (Not that many SET commands exists in
lars@mysql.com's avatar
lars@mysql.com committed
2380 2381
        the binary log anyway -- only 4.1 masters write SET statements,
	in 5.0 there are no SET statements in the binary log)
2382 2383
      - DROP TEMPORARY TABLE IF EXISTS: we always execute it (otherwise we
        have stale files on slave caused by exclusion of one tmp table).
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2384
    */
2385 2386
    if (!(lex->sql_command == SQLCOM_SET_OPTION) &&
	!(lex->sql_command == SQLCOM_DROP_TABLE &&
2387
          lex->drop_temporary && lex->drop_if_exists) &&
guilhem@mysql.com's avatar
Merge  
guilhem@mysql.com committed
2388
        all_tables_not_ok(thd, all_tables))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
2389 2390
    {
      /* we warn the slave SQL thread */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2391
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
2392
      reset_one_shot_variables(thd);
2393
      DBUG_RETURN(0);
guilhem@mysql.com's avatar
guilhem@mysql.com committed
2394
    }
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2395 2396
#ifndef TO_BE_DELETED
    /*
2397 2398 2399
      This is a workaround to deal with the shortcoming in 3.23.44-3.23.46
      masters in RELEASE_LOCK() logging. We re-write SELECT RELEASE_LOCK()
      as DO RELEASE_LOCK()
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2400
    */
2401 2402 2403
    if (lex->sql_command == SQLCOM_SELECT)
    {
      lex->sql_command = SQLCOM_DO;
2404
      lex->insert_list = &select_lex->item_list;
2405
    }
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2406
#endif
2407
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
2408
#endif /* !HAVE_REPLICATION */
2409

2410 2411 2412 2413 2414
  /*
    When option readonly is set deny operations which change tables.
    Except for the replication thread and the 'super' users.
  */
  if (opt_readonly &&
2415 2416
      !(thd->slave_thread ||
        (thd->security_ctx->master_access & SUPER_ACL)) &&
2417
      uc_update_queries[lex->sql_command])
2418
  {
2419
    my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--read-only");
2420
    DBUG_RETURN(-1);
2421
  }
2422 2423 2424
  if(lex->orig_sql_command == SQLCOM_END)
    statistic_increment(thd->status_var.com_stat[lex->sql_command],
                        &LOCK_status);
2425

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2426 2427 2428
  switch (lex->sql_command) {
  case SQLCOM_SELECT:
  {
2429 2430 2431 2432
    /* assign global limit variable if limit is not given */
    {
      SELECT_LEX *param= lex->unit.global_parameters;
      if (!param->explicit_limit)
2433 2434
	param->select_limit=
          new Item_int((ulonglong)thd->variables.select_limit);
2435 2436
    }

2437
    select_result *result=lex->result;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2438
    if (all_tables)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2439
    {
2440 2441 2442 2443 2444 2445
      if (lex->orig_sql_command != SQLCOM_SHOW_STATUS_PROC &&
          lex->orig_sql_command != SQLCOM_SHOW_STATUS_FUNC)
        res= check_table_access(thd,
                                lex->exchange ? SELECT_ACL | FILE_ACL :
                                SELECT_ACL,
                                all_tables, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2446 2447
    }
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2448 2449
      res= check_access(thd,
			lex->exchange ? SELECT_ACL | FILE_ACL : SELECT_ACL,
2450
			any_db, 0, 0, 0, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2451
    if (res)
2452
      goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2453

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2454
    if (!(res= open_and_lock_tables(thd, all_tables)))
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2455
    {
2456
      if (lex->describe)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2457
      {
2458 2459 2460 2461 2462 2463
        /*
          We always use select_send for EXPLAIN, even if it's an EXPLAIN
          for SELECT ... INTO OUTFILE: a user application should be able
          to prepend EXPLAIN to any query and receive output for it,
          even if the query itself redirects the output.
        */
2464
	if (!(result= new select_send()))
2465
	  goto error;
2466 2467
	else
	  thd->send_explain_fields(result);
2468
	res= mysql_explain_union(thd, &thd->lex->unit, result);
2469 2470 2471 2472 2473
	if (lex->describe & DESCRIBE_EXTENDED)
	{
	  char buff[1024];
	  String str(buff,(uint32) sizeof(buff), system_charset_info);
	  str.length(0);
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
2474
	  thd->lex->unit.print(&str);
2475 2476 2477 2478
	  str.append('\0');
	  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
		       ER_YES, str.ptr());
	}
2479
	result->send_eof();
2480
        delete result;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2481 2482 2483
      }
      else
      {
2484
	if (!result && !(result= new select_send()))
2485
          goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2486
	query_cache_store_query(thd, all_tables);
2487
	res= handle_select(thd, lex, result, 0);
2488 2489
        if (result != lex->result)
          delete result;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2490
      }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2491
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2492 2493
    break;
  }
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2494
  case SQLCOM_PREPARE:
2495
  {
2496
    mysql_sql_stmt_prepare(thd);
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2497 2498 2499 2500
    break;
  }
  case SQLCOM_EXECUTE:
  {
2501
    mysql_sql_stmt_execute(thd);
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2502 2503 2504 2505
    break;
  }
  case SQLCOM_DEALLOCATE_PREPARE:
  {
2506
    mysql_sql_stmt_close(thd);
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2507 2508
    break;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2509
  case SQLCOM_DO:
2510 2511
    if (check_table_access(thd, SELECT_ACL, all_tables, 0) ||
        open_and_lock_tables(thd, all_tables))
2512
      goto error;
2513 2514

    res= mysql_do(thd, *lex->insert_list);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2515 2516
    break;

2517
  case SQLCOM_EMPTY_QUERY:
2518
    send_ok(thd);
2519 2520
    break;

2521 2522 2523 2524
  case SQLCOM_HELP:
    res= mysqld_help(thd,lex->help_arg);
    break;

2525
#ifndef EMBEDDED_LIBRARY
2526
  case SQLCOM_PURGE:
2527
  {
2528
    if (check_global_access(thd, SUPER_ACL))
2529
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
2530
    /* PURGE MASTER LOGS TO 'file' */
2531 2532 2533
    res = purge_master_logs(thd, lex->to_log);
    break;
  }
2534 2535
  case SQLCOM_PURGE_BEFORE:
  {
2536 2537
    Item *it;

2538 2539
    if (check_global_access(thd, SUPER_ACL))
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
2540
    /* PURGE MASTER LOGS BEFORE 'data' */
2541
    it= (Item *)lex->value_list.head();
2542
    if ((!it->fixed && it->fix_fields(lex->thd, &it)) ||
2543
        it->check_cols(1))
2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554
    {
      my_error(ER_WRONG_ARGUMENTS, MYF(0), "PURGE LOGS BEFORE");
      goto error;
    }
    it= new Item_func_unix_timestamp(it);
    /*
      it is OK only emulate fix_fieds, because we need only
      value of constant
    */
    it->quick_fix_field();
    res = purge_master_logs_before_date(thd, (ulong)it->val_int());
2555 2556
    break;
  }
2557
#endif
2558 2559
  case SQLCOM_SHOW_WARNS:
  {
2560 2561
    res= mysqld_show_warnings(thd, (ulong)
			      ((1L << (uint) MYSQL_ERROR::WARN_LEVEL_NOTE) |
2562 2563 2564
			       (1L << (uint) MYSQL_ERROR::WARN_LEVEL_WARN) |
			       (1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR)
			       ));
2565 2566 2567 2568
    break;
  }
  case SQLCOM_SHOW_ERRORS:
  {
2569 2570
    res= mysqld_show_warnings(thd, (ulong)
			      (1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR));
2571 2572
    break;
  }
2573 2574
  case SQLCOM_SHOW_NEW_MASTER:
  {
2575
    if (check_global_access(thd, REPL_SLAVE_ACL))
2576
      goto error;
2577
    /* This query don't work now. See comment in repl_failsafe.cc */
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
2578
#ifndef WORKING_NEW_MASTER
2579 2580
    my_error(ER_NOT_SUPPORTED_YET, MYF(0), "SHOW NEW MASTER");
    goto error;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
2581
#else
2582 2583
    res = show_new_master(thd);
    break;
2584
#endif
2585
  }
2586

2587
#ifdef HAVE_REPLICATION
2588 2589
  case SQLCOM_SHOW_SLAVE_HOSTS:
  {
2590
    if (check_global_access(thd, REPL_SLAVE_ACL))
2591 2592 2593 2594
      goto error;
    res = show_slave_hosts(thd);
    break;
  }
2595 2596
  case SQLCOM_SHOW_BINLOG_EVENTS:
  {
2597
    if (check_global_access(thd, REPL_SLAVE_ACL))
2598
      goto error;
2599
    res = mysql_show_binlog_events(thd);
2600 2601
    break;
  }
2602 2603
#endif

2604
  case SQLCOM_BACKUP_TABLE:
2605
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2606 2607 2608
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL, all_tables, 0) ||
2609
	check_global_access(thd, FILE_ACL))
2610
      goto error; /* purecov: inspected */
2611
    thd->enable_slow_log= opt_log_slow_admin_statements;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2612
    res = mysql_backup_table(thd, first_table);
2613

2614 2615
    break;
  }
2616
  case SQLCOM_RESTORE_TABLE:
2617
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2618 2619 2620
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, INSERT_ACL, all_tables, 0) ||
2621
	check_global_access(thd, FILE_ACL))
2622
      goto error; /* purecov: inspected */
2623
    thd->enable_slow_log= opt_log_slow_admin_statements;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2624
    res = mysql_restore_table(thd, first_table);
2625 2626
    break;
  }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2627 2628
  case SQLCOM_ASSIGN_TO_KEYCACHE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2629 2630 2631
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
        check_access(thd, INDEX_ACL, first_table->db,
2632 2633
                     &first_table->grant.privilege, 0, 0,
                     test(first_table->schema_table)))
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2634
      goto error;
2635
    res= mysql_assign_to_keycache(thd, first_table, &lex->ident);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2636 2637
    break;
  }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2638 2639
  case SQLCOM_PRELOAD_KEYS:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2640 2641 2642
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_access(thd, INDEX_ACL, first_table->db,
2643 2644
                     &first_table->grant.privilege, 0, 0,
                     test(first_table->schema_table)))
2645
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2646
    res = mysql_preload_keys(thd, first_table);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2647 2648
    break;
  }
2649
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2650
  case SQLCOM_CHANGE_MASTER:
2651
  {
2652
    if (check_global_access(thd, SUPER_ACL))
2653
      goto error;
2654
    pthread_mutex_lock(&LOCK_active_mi);
2655
    res = change_master(thd,active_mi);
2656
    pthread_mutex_unlock(&LOCK_active_mi);
2657 2658
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2659
  case SQLCOM_SHOW_SLAVE_STAT:
2660
  {
2661 2662
    /* Accept one of two privileges */
    if (check_global_access(thd, SUPER_ACL | REPL_CLIENT_ACL))
2663
      goto error;
2664
    pthread_mutex_lock(&LOCK_active_mi);
2665
    res = show_master_info(thd,active_mi);
2666
    pthread_mutex_unlock(&LOCK_active_mi);
2667 2668
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2669
  case SQLCOM_SHOW_MASTER_STAT:
2670
  {
2671 2672
    /* Accept one of two privileges */
    if (check_global_access(thd, SUPER_ACL | REPL_CLIENT_ACL))
2673 2674 2675 2676
      goto error;
    res = show_binlog_info(thd);
    break;
  }
peter@mysql.com's avatar
peter@mysql.com committed
2677

2678
  case SQLCOM_LOAD_MASTER_DATA: // sync with master
2679
    if (check_global_access(thd, SUPER_ACL))
2680
      goto error;
2681
    if (end_active_trans(thd))
2682
      goto error;
2683 2684
    else
      res = load_master_data(thd);
2685
    break;
2686
#endif /* HAVE_REPLICATION */
2687 2688 2689 2690 2691 2692 2693
#ifdef HAVE_NDBCLUSTER_DB
  case SQLCOM_SHOW_NDBCLUSTER_STATUS:
    {
      res = ndbcluster_show_status(thd);
      break;
    }
#endif
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2694 2695 2696
#ifdef HAVE_INNOBASE_DB
  case SQLCOM_SHOW_INNODB_STATUS:
    {
2697
      if (check_global_access(thd, SUPER_ACL))
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2698 2699 2700 2701
	goto error;
      res = innodb_show_status(thd);
      break;
    }
vtkachenko@intelp4d.mysql.com's avatar
vtkachenko@intelp4d.mysql.com committed
2702 2703 2704
  case SQLCOM_SHOW_MUTEX_STATUS:
    {
      if (check_global_access(thd, SUPER_ACL))
vtkachenko@intelp4d.mysql.com's avatar
vtkachenko@intelp4d.mysql.com committed
2705
        goto error;
vtkachenko@intelp4d.mysql.com's avatar
vtkachenko@intelp4d.mysql.com committed
2706 2707 2708
      res = innodb_mutex_show_status(thd);
      break;
    }
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
2709
#endif
2710
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2711
  case SQLCOM_LOAD_MASTER_TABLE:
2712
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2713 2714 2715 2716
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (!first_table->db)
      first_table->db= thd->db;
    if (check_access(thd, CREATE_ACL, first_table->db,
2717 2718
		     &first_table->grant.privilege, 0, 0,
                     test(first_table->schema_table)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2719 2720 2721 2722
      goto error;				/* purecov: inspected */
    if (grant_option)
    {
      /* Check that the first table has CREATE privilege */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2723
      if (check_grant(thd, CREATE_ACL, all_tables, 0, 1, 0))
2724
	goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2725
    }
2726
    if (strlen(first_table->table_name) > NAME_LEN)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2727
    {
2728
      my_error(ER_WRONG_TABLE_NAME, MYF(0), first_table->table_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2729 2730
      break;
    }
2731
    pthread_mutex_lock(&LOCK_active_mi);
2732 2733 2734 2735
    /*
      fetch_master_table will send the error to the client on failure.
      Give error if the table already exists.
    */
2736
    if (!fetch_master_table(thd, first_table->db, first_table->table_name,
2737
			    active_mi, 0, 0))
2738
    {
2739
      send_ok(thd);
2740
    }
2741
    pthread_mutex_unlock(&LOCK_active_mi);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2742
    break;
2743
  }
2744
#endif /* HAVE_REPLICATION */
2745

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2746
  case SQLCOM_CREATE_TABLE:
2747
  {
2748
    /* If CREATE TABLE of non-temporary table, do implicit commit */
2749 2750 2751 2752 2753 2754 2755 2756 2757 2758
    if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
    {
      if (end_active_trans(thd))
      {
	res= -1;
	break;
      }
    }
    else 
    {
2759 2760
      /* So that CREATE TEMPORARY TABLE gets to binlog at commit/rollback */
      thd->options|= OPTION_STATUS_NO_TRANS_UPDATE;
2761
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2762 2763 2764 2765 2766
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    bool link_to_local;
    // Skip first table, which is the table we are creating
    TABLE_LIST *create_table= lex->unlink_first_table(&link_to_local);
    TABLE_LIST *select_tables= lex->query_tables;
monty@mysql.com's avatar
monty@mysql.com committed
2767

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2768
    if ((res= create_table_precheck(thd, select_tables, create_table)))
monty@mysql.com's avatar
monty@mysql.com committed
2769
      goto end_with_restore_list;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2770

2771 2772 2773
#ifndef HAVE_READLINK
    lex->create_info.data_file_name=lex->create_info.index_file_name=0;
#else
2774
    /* Fix names if symlinked tables */
2775
    if (append_file_to_dir(thd, &lex->create_info.data_file_name,
2776
			   create_table->table_name) ||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2777
	append_file_to_dir(thd, &lex->create_info.index_file_name,
2778
			   create_table->table_name))
monty@mysql.com's avatar
monty@mysql.com committed
2779
      goto end_with_restore_list;
2780
#endif
2781
    /*
2782
      If we are using SET CHARSET without DEFAULT, add an implicit
2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793
      DEFAULT to not confuse old users. (This may change).
    */
    if ((lex->create_info.used_fields & 
	 (HA_CREATE_USED_DEFAULT_CHARSET | HA_CREATE_USED_CHARSET)) ==
	HA_CREATE_USED_CHARSET)
    {
      lex->create_info.used_fields&= ~HA_CREATE_USED_CHARSET;
      lex->create_info.used_fields|= HA_CREATE_USED_DEFAULT_CHARSET;
      lex->create_info.default_table_charset= lex->create_info.table_charset;
      lex->create_info.table_charset= 0;
    }
2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808
    /*
      The create-select command will open and read-lock the select table
      and then create, open and write-lock the new table. If a global
      read lock steps in, we get a deadlock. The write lock waits for
      the global read lock, while the global read lock waits for the
      select table to be closed. So we wait until the global readlock is
      gone before starting both steps. Note that
      wait_if_global_read_lock() sets a protection against a new global
      read lock when it succeeds. This needs to be released by
      start_waiting_global_read_lock(). We protect the normal CREATE
      TABLE in the same way. That way we avoid that a new table is
      created during a gobal read lock.
    */
    if (wait_if_global_read_lock(thd, 0, 1))
    {
monty@mysql.com's avatar
monty@mysql.com committed
2809 2810
      res= 1;
      goto end_with_restore_list;
2811
    }
2812
    if (select_lex->item_list.elements)		// With select
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2813 2814
    {
      select_result *result;
2815

2816
      select_lex->options|= SELECT_NO_UNLOCK;
2817
      unit->set_limit(select_lex);
2818

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2819
      if (!(res= open_and_lock_tables(thd, select_tables)))
2820
      {
2821 2822 2823 2824
        /*
          Is table which we are changing used somewhere in other parts
          of query
        */
2825
        if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
2826
        {
2827 2828 2829 2830 2831 2832 2833
          TABLE_LIST *duplicate;
          if ((duplicate= unique_table(create_table, select_tables)))
          {
            update_non_unique_table_error(create_table, "CREATE", duplicate);
            res= 1;
            goto end_with_restart_wait;
          }
2834
        }
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2835 2836 2837 2838 2839 2840 2841 2842
        /* If we create merge table, we have to test tables in merge, too */
        if (lex->create_info.used_fields & HA_CREATE_USED_UNION)
        {
          TABLE_LIST *tab;
          for (tab= (TABLE_LIST*) lex->create_info.merge_list.first;
               tab;
               tab= tab->next_local)
          {
2843 2844
            TABLE_LIST *duplicate;
            if ((duplicate= unique_table(tab, select_tables)))
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2845
            {
2846
              update_non_unique_table_error(tab, "CREATE", duplicate);
monty@mysql.com's avatar
monty@mysql.com committed
2847 2848
              res= 1;
              goto end_with_restart_wait;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2849 2850 2851
            }
          }
        }
2852

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2853 2854 2855 2856 2857
        if ((result= new select_create(create_table,
				       &lex->create_info,
				       lex->create_list,
				       lex->key_list,
				       select_lex->item_list,
2858 2859
				       lex->duplicates,
				       lex->ignore)))
2860 2861 2862 2863 2864
        {
          /*
            CREATE from SELECT give its SELECT_LEX for SELECT,
            and item_list belong to SELECT
          */
2865
          res= handle_select(thd, lex, result, 0);
2866
          delete result;
2867
        }
monty@mysql.com's avatar
monty@mysql.com committed
2868
	/* reset for PS */
2869 2870
	lex->create_list.empty();
	lex->key_list.empty();
2871 2872
      }
    }
monty@mysql.com's avatar
monty@mysql.com committed
2873
    else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2874
    {
monty@mysql.com's avatar
monty@mysql.com committed
2875
      /* regular create */
venu@myvenu.com's avatar
venu@myvenu.com committed
2876
      if (lex->name)
monty@mysql.com's avatar
monty@mysql.com committed
2877
        res= mysql_create_like_table(thd, create_table, &lex->create_info, 
venu@myvenu.com's avatar
venu@myvenu.com committed
2878 2879
                                     (Table_ident *)lex->name); 
      else
2880
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2881
        res= mysql_create_table(thd, create_table->db,
2882
				create_table->table_name, &lex->create_info,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2883
				lex->create_list,
monty@mysql.com's avatar
monty@mysql.com committed
2884
				lex->key_list, 0, 0);
2885
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2886
      if (!res)
2887
	send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2888
    }
2889

monty@mysql.com's avatar
monty@mysql.com committed
2890
end_with_restart_wait:
2891 2892 2893 2894 2895 2896
    /*
      Release the protection against the global read lock and wake
      everyone, who might want to set a global read lock.
    */
    start_waiting_global_read_lock(thd);

monty@mysql.com's avatar
monty@mysql.com committed
2897
    /* put tables back for PS rexecuting */
monty@mysql.com's avatar
monty@mysql.com committed
2898
end_with_restore_list:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2899
    lex->link_first_table_back(create_table, link_to_local);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2900
    break;
2901
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2902
  case SQLCOM_CREATE_INDEX:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2903 2904
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_one_table_access(thd, INDEX_ACL, all_tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2905
      goto error; /* purecov: inspected */
2906
    thd->enable_slow_log= opt_log_slow_admin_statements;
2907
    if (end_active_trans(thd))
2908
      goto error;
2909
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2910
      res = mysql_create_index(thd, first_table, lex->key_list);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2911 2912
    break;

2913
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2914
  case SQLCOM_SLAVE_START:
2915
  {
2916
    pthread_mutex_lock(&LOCK_active_mi);
2917
    start_slave(thd,active_mi,1 /* net report*/);
2918
    pthread_mutex_unlock(&LOCK_active_mi);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2919
    break;
2920
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2921
  case SQLCOM_SLAVE_STOP:
2922 2923 2924 2925 2926 2927
  /*
    If the client thread has locked tables, a deadlock is possible.
    Assume that
    - the client thread does LOCK TABLE t READ.
    - then the master updates t.
    - then the SQL slave thread wants to update t,
2928
      so it waits for the client thread because t is locked by it.
2929
    - then the client thread does SLAVE STOP.
2930 2931
      SLAVE STOP waits for the SQL slave thread to terminate its
      update t, which waits for the client thread because t is locked by it.
2932 2933 2934 2935 2936
    To prevent that, refuse SLAVE STOP if the
    client thread has locked tables
  */
  if (thd->locked_tables || thd->active_transaction())
  {
2937 2938
    my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
               ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
2939
    goto error;
2940
  }
2941
  {
2942
    pthread_mutex_lock(&LOCK_active_mi);
2943
    stop_slave(thd,active_mi,1/* net report*/);
2944
    pthread_mutex_unlock(&LOCK_active_mi);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2945
    break;
2946
  }
2947
#endif /* HAVE_REPLICATION */
2948

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2949
  case SQLCOM_ALTER_TABLE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2950
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2951
#if defined(DONT_ALLOW_SHOW_COMMANDS)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2952 2953
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
2954
    goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2955 2956
#else
    {
2957
      ulong priv=0;
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2958
      if (lex->name && (!lex->name[0] || strlen(lex->name) > NAME_LEN))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2959
      {
2960
	my_error(ER_WRONG_TABLE_NAME, MYF(0), lex->name);
2961
        goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2962
      }
2963
      if (!select_lex->db)
2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
      {
        /*
          In the case of ALTER TABLE ... RENAME we should supply the
          default database if the new name is not explicitly qualified
          by a database. (Bug #11493)
        */
        if (lex->alter_info.flags & ALTER_RENAME)
        {
          if (! thd->db)
          {
ingo@mysql.com's avatar
ingo@mysql.com committed
2974
            my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
2975 2976 2977 2978 2979
            goto error;
          }
          select_lex->db= thd->db;
        }
        else
2980
          select_lex->db= first_table->db;
2981
      }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2982
      if (check_access(thd, ALTER_ACL, first_table->db,
2983 2984 2985 2986
		       &first_table->grant.privilege, 0, 0,
                       test(first_table->schema_table)) ||
	  check_access(thd,INSERT_ACL | CREATE_ACL,select_lex->db,&priv,0,0,
                       is_schema_db(select_lex->db))||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2987
	  check_merge_table_access(thd, first_table->db,
2988 2989 2990
				   (TABLE_LIST *)
				   lex->create_info.merge_list.first))
	goto error;				/* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2991 2992
      if (grant_option)
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2993
	if (check_grant(thd, ALTER_ACL, all_tables, 0, UINT_MAX, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2994 2995 2996 2997 2998
	  goto error;
	if (lex->name && !test_all_bits(priv,INSERT_ACL | CREATE_ACL))
	{					// Rename of table
	  TABLE_LIST tmp_table;
	  bzero((char*) &tmp_table,sizeof(tmp_table));
2999
	  tmp_table.table_name=lex->name;
3000
	  tmp_table.db=select_lex->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3001
	  tmp_table.grant.privilege=priv;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3002 3003
	  if (check_grant(thd, INSERT_ACL | CREATE_ACL, &tmp_table, 0,
			  UINT_MAX, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3004 3005 3006
	    goto error;
	}
      }
3007 3008
      /* Don't yet allow changing of symlinks with ALTER TABLE */
      lex->create_info.data_file_name=lex->create_info.index_file_name=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3009
      /* ALTER TABLE ends previous transaction */
3010
      if (end_active_trans(thd))
3011
	goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3012
      else
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3013
      {
3014
        thd->enable_slow_log= opt_log_slow_admin_statements;
3015
	res= mysql_alter_table(thd, select_lex->db, lex->name,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3016
			       &lex->create_info,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3017
			       first_table, lex->create_list,
3018
			       lex->key_list,
3019
			       select_lex->order_list.elements,
3020
                               (ORDER *) select_lex->order_list.first,
monty@mysql.com's avatar
monty@mysql.com committed
3021 3022
			       lex->duplicates, lex->ignore, &lex->alter_info,
                               1);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3023
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3024 3025
      break;
    }
hf@deer.(none)'s avatar
hf@deer.(none) committed
3026
#endif /*DONT_ALLOW_SHOW_COMMANDS*/
3027
  case SQLCOM_RENAME_TABLE:
3028
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3029
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3030
    TABLE_LIST *table;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3031
    if (check_db_used(thd, all_tables))
3032
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3033
    for (table= first_table; table; table= table->next_local->next_local)
3034
    {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
3035
      if (check_access(thd, ALTER_ACL | DROP_ACL, table->db,
3036
		       &table->grant.privilege,0,0, test(table->schema_table)) ||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3037
	  check_access(thd, INSERT_ACL | CREATE_ACL, table->next_local->db,
3038 3039
		       &table->next_local->grant.privilege, 0, 0,
                       test(table->next_local->schema_table)))
3040 3041 3042
	goto error;
      if (grant_option)
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3043
	TABLE_LIST old_list, new_list;
3044 3045 3046 3047
	/*
	  we do not need initialize old_list and new_list because we will
	  come table[0] and table->next[0] there
	*/
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3048 3049 3050 3051
	old_list= table[0];
	new_list= table->next_local[0];
	if (check_grant(thd, ALTER_ACL, &old_list, 0, 1, 0) ||
	    (!test_all_bits(table->next_local->grant.privilege,
3052
			    INSERT_ACL | CREATE_ACL) &&
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3053
	     check_grant(thd, INSERT_ACL | CREATE_ACL, &new_list, 0, 1, 0)))
3054 3055 3056
	  goto error;
      }
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3057
    query_cache_invalidate3(thd, first_table, 0);
3058 3059
    if (end_active_trans(thd) || mysql_rename_tables(thd, first_table))
      goto error;
3060
    break;
3061
  }
3062
#ifndef EMBEDDED_LIBRARY
3063 3064
  case SQLCOM_SHOW_BINLOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3065 3066
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
3067
    goto error;
3068 3069
#else
    {
3070
      if (check_global_access(thd, SUPER_ACL))
3071 3072 3073 3074
	goto error;
      res = show_binlogs(thd);
      break;
    }
peter@mysql.com's avatar
peter@mysql.com committed
3075
#endif
3076
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3077
  case SQLCOM_SHOW_CREATE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3078
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3079
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3080 3081
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
3082
    goto error;
3083
#else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3084
    {
3085 3086 3087 3088
      /* Ignore temporary tables if this is "SHOW CREATE VIEW" */
      if (lex->only_view)
        first_table->skip_temporary= 1;

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3089 3090
      if (check_db_used(thd, all_tables) ||
	  check_access(thd, SELECT_ACL | EXTRA_ACL, first_table->db,
3091 3092
		       &first_table->grant.privilege, 0, 0, 
                       test(first_table->schema_table)))
3093
	goto error;
monty@mishka.local's avatar
monty@mishka.local committed
3094
      if (grant_option && check_grant(thd, SELECT_ACL, all_tables, 2, UINT_MAX, 0))
3095
	goto error;
monty@mishka.local's avatar
monty@mishka.local committed
3096
      res= mysqld_show_create(thd, first_table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3097 3098
      break;
    }
3099
#endif
3100 3101
  case SQLCOM_CHECKSUM:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3102 3103 3104
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL | EXTRA_ACL, all_tables, 0))
3105
      goto error; /* purecov: inspected */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3106
    res = mysql_checksum_table(thd, first_table, &lex->check_opt);
3107 3108
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3109
  case SQLCOM_REPAIR:
3110
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3111 3112 3113
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL | INSERT_ACL, all_tables, 0))
3114
      goto error; /* purecov: inspected */
3115
    thd->enable_slow_log= opt_log_slow_admin_statements;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3116
    res= mysql_repair_table(thd, first_table, &lex->check_opt);
3117 3118 3119 3120 3121
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3122
	thd->clear_error(); // No binlog error generated
3123
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3124 3125 3126
        mysql_bin_log.write(&qinfo);
      }
    }
3127 3128
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3129
  case SQLCOM_CHECK:
3130
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3131 3132 3133
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL | EXTRA_ACL , all_tables, 0))
3134
      goto error; /* purecov: inspected */
3135
    thd->enable_slow_log= opt_log_slow_admin_statements;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3136
    res = mysql_check_table(thd, first_table, &lex->check_opt);
3137 3138
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3139 3140
  case SQLCOM_ANALYZE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3141 3142 3143
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL | INSERT_ACL, all_tables, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3144
      goto error; /* purecov: inspected */
3145
    thd->enable_slow_log= opt_log_slow_admin_statements;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3146
    res = mysql_analyze_table(thd, first_table, &lex->check_opt);
3147 3148 3149 3150 3151
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3152
	thd->clear_error(); // No binlog error generated
3153
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3154 3155 3156
        mysql_bin_log.write(&qinfo);
      }
    }
3157
    break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3158
  }
3159

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3160 3161
  case SQLCOM_OPTIMIZE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3162 3163 3164
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL | INSERT_ACL, all_tables, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3165
      goto error; /* purecov: inspected */
3166
    thd->enable_slow_log= opt_log_slow_admin_statements;
3167
    res= (specialflag & (SPECIAL_SAFE_MODE | SPECIAL_NO_NEW_FUNC)) ?
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3168 3169
      mysql_recreate_table(thd, first_table, 1) :
      mysql_optimize_table(thd, first_table, &lex->check_opt);
3170 3171 3172 3173 3174
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3175
	thd->clear_error(); // No binlog error generated
3176
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3177 3178 3179
        mysql_bin_log.write(&qinfo);
      }
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3180 3181 3182
    break;
  }
  case SQLCOM_UPDATE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3183 3184
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (update_precheck(thd, all_tables))
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3185
      break;
3186 3187
    DBUG_ASSERT(select_lex->offset_limit == 0);
    unit->set_limit(select_lex);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3188 3189 3190 3191 3192 3193
    res= (result= mysql_update(thd, all_tables,
                               select_lex->item_list,
                               lex->value_list,
                               select_lex->where,
                               select_lex->order_list.elements,
                               (ORDER *) select_lex->order_list.first,
3194
                               unit->select_limit_cnt,
3195
                               lex->duplicates, lex->ignore));
3196
    /* mysql_update return 2 if we need to switch to multi-update */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3197
    if (result != 2)
3198
      break;
3199
  case SQLCOM_UPDATE_MULTI:
3200
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3201
      DBUG_ASSERT(first_table == all_tables && first_table != 0);
3202
      /* if we switched from normal update, rights are checked */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215
      if (result != 2)
      {
        if ((res= multi_update_precheck(thd, all_tables)))
          break;
      }
      else
        res= 0;

      res= mysql_multi_update(thd, all_tables,
                              &select_lex->item_list,
                              &lex->value_list,
                              select_lex->where,
                              select_lex->options,
3216
                              lex->duplicates, lex->ignore, unit, select_lex);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3217
    break;
monty@mysql.com's avatar
monty@mysql.com committed
3218
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3219
  case SQLCOM_REPLACE:
3220 3221
  case SQLCOM_INSERT:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3222
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
monty@mysql.com's avatar
monty@mysql.com committed
3223
    if ((res= insert_precheck(thd, all_tables)))
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3224
      break;
3225 3226
    /* Skip first table, which is the table we are inserting in */
    select_lex->context.table_list= first_table->next_local;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3227
    res= mysql_insert(thd, all_tables, lex->field_list, lex->many_values,
monty@mishka.local's avatar
monty@mishka.local committed
3228
		      lex->update_list, lex->value_list,
3229
                      lex->duplicates, lex->ignore);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3230 3231
    if (first_table->view && !first_table->contain_auto_increment)
      thd->last_insert_id= 0; // do not show last insert ID if VIEW have not it
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3232
    break;
3233
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3234 3235 3236
  case SQLCOM_REPLACE_SELECT:
  case SQLCOM_INSERT_SELECT:
  {
monty@mysql.com's avatar
monty@mysql.com committed
3237
    select_result *result;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3238
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
monty@mishka.local's avatar
monty@mishka.local committed
3239
    if ((res= insert_precheck(thd, all_tables)))
3240
      break;
monty@mysql.com's avatar
monty@mysql.com committed
3241

3242
    /* Fix lock for first table */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3243 3244
    if (first_table->lock_type == TL_WRITE_DELAYED)
      first_table->lock_type= TL_WRITE;
3245

3246 3247
    /* Don't unlock tables until command is written to binary log */
    select_lex->options|= SELECT_NO_UNLOCK;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3248

3249
    unit->set_limit(select_lex);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3250
    if (!(res= open_and_lock_tables(thd, all_tables)))
3251
    {
3252
      /* Skip first table, which is the table we are inserting in */
3253 3254
      TABLE_LIST *second_table= first_table->next_local;
      select_lex->table_list.first= (byte*) second_table;
3255 3256
      select_lex->context.table_list= 
        select_lex->context.first_name_resolution_table= second_table;
3257 3258 3259
      res= mysql_insert_select_prepare(thd);
      if (!res && (result= new select_insert(first_table, first_table->table,
                                             &lex->field_list,
3260 3261
                                             &lex->update_list,
                                             &lex->value_list,
3262
                                             lex->duplicates, lex->ignore)))
3263
      {
3264 3265 3266 3267 3268 3269 3270
        /*
          Skip first table, which is the table we are inserting in.
          Below we set context.table_list again because the call above to
          mysql_insert_select_prepare() calls resolve_in_table_list_only(),
          which in turn resets context.table_list and
          context.first_name_resolution_table.
        */
3271 3272
        select_lex->context.table_list= 
          select_lex->context.first_name_resolution_table= second_table;
3273
	res= handle_select(thd, lex, result, OPTION_SETUP_TABLES_DONE);
3274 3275
        delete result;
      }
3276
      /* revert changes for SP */
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
3277
      select_lex->table_list.first= (byte*) first_table;
3278
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3279 3280 3281

    if (first_table->view && !first_table->contain_auto_increment)
      thd->last_insert_id= 0; // do not show last insert ID if VIEW have not it
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3282 3283
    break;
  }
3284
  case SQLCOM_TRUNCATE:
3285 3286 3287 3288 3289
    if (end_active_trans(thd))
    {
      res= -1;
      break;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3290 3291
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_one_table_access(thd, DELETE_ACL, all_tables))
3292
      goto error;
3293 3294 3295 3296
    /*
      Don't allow this within a transaction because we want to use
      re-generate table
    */
3297
    if ((thd->locked_tables && !lex->sphead) || thd->active_transaction())
3298
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3299 3300
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3301 3302
      goto error;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3303

monty@mysql.com's avatar
monty@mysql.com committed
3304
    res= mysql_truncate(thd, first_table, 0);
3305
    break;
3306
  case SQLCOM_DELETE:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3307
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3308 3309
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if ((res= delete_precheck(thd, all_tables)))
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3310
      break;
3311 3312
    DBUG_ASSERT(select_lex->offset_limit == 0);
    unit->set_limit(select_lex);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3313
    res = mysql_delete(thd, all_tables, select_lex->where,
3314
                       &select_lex->order_list,
osku@127.(none)'s avatar
osku@127.(none) committed
3315 3316
                       unit->select_limit_cnt, select_lex->options,
                       FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3317 3318
    break;
  }
3319
  case SQLCOM_DELETE_MULTI:
3320
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3321
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3322 3323
    TABLE_LIST *aux_tables=
      (TABLE_LIST *)thd->lex->auxilliary_table_list.first;
3324
    multi_delete *result;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3325

3326
    if ((res= multi_delete_precheck(thd, all_tables)))
3327
      break;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3328

3329
    /* condition will be TRUE on SP re-excuting */
3330 3331
    if (select_lex->item_list.elements != 0)
      select_lex->item_list.empty();
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3332
    if (add_item_to_list(thd, new Item_null()))
3333
      goto error;
3334

3335
    thd->proc_info="init";
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3336 3337 3338 3339
    if ((res= open_and_lock_tables(thd, all_tables)))
      break;

    if ((res= mysql_multi_delete_prepare(thd)))
3340
      goto error;
3341

3342
    if (!thd->is_fatal_error && (result= new multi_delete(aux_tables,
3343
							  lex->table_count)))
3344
    {
3345 3346 3347
      res= mysql_select(thd, &select_lex->ref_pointer_array,
			select_lex->get_table_list(),
			select_lex->with_wild,
3348
			select_lex->item_list,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3349
			select_lex->where,
3350
			0, (ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3351 3352
			(ORDER *)NULL,
			select_lex->options | thd->options |
3353 3354
			SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK |
                        OPTION_SETUP_TABLES_DONE,
3355
			result, unit, select_lex);
3356
      delete result;
3357 3358
    }
    else
3359
      res= TRUE;                                // Error
3360 3361
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3362
  case SQLCOM_DROP_TABLE:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
3363
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3364
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3365 3366
    if (!lex->drop_temporary)
    {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3367
      if (check_table_access(thd, DROP_ACL, all_tables, 0))
3368 3369
	goto error;				/* purecov: inspected */
      if (end_active_trans(thd))
3370
        goto error;
3371
    }
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
3372
    else
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3373 3374 3375 3376 3377 3378
    {
      /*
	If this is a slave thread, we may sometimes execute some 
	DROP / * 40005 TEMPORARY * / TABLE
	that come from parts of binlogs (likely if we use RESET SLAVE or CHANGE
	MASTER TO), while the temporary table has already been dropped.
monty@mysql.com's avatar
monty@mysql.com committed
3379 3380
	To not generate such irrelevant "table does not exist errors",
	we silently add IF EXISTS if TEMPORARY was used.
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3381 3382 3383
      */
      if (thd->slave_thread)
	lex->drop_if_exists= 1;
3384

3385 3386
      /* So that DROP TEMPORARY TABLE gets to binlog at commit/rollback */
      thd->options|= OPTION_STATUS_NO_TRANS_UPDATE;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3387
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3388 3389
    res= mysql_rm_table(thd, first_table, lex->drop_if_exists,
			lex->drop_temporary);
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
3390 3391
  }
  break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3392
  case SQLCOM_DROP_INDEX:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3393 3394
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_one_table_access(thd, INDEX_ACL, all_tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3395
      goto error;				/* purecov: inspected */
3396
    if (end_active_trans(thd))
3397
      goto error;
3398
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3399
      res = mysql_drop_index(thd, first_table, &lex->alter_info);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3400 3401
    break;
  case SQLCOM_SHOW_PROCESSLIST:
3402 3403
    if (!thd->security_ctx->priv_user[0] &&
        check_global_access(thd,PROCESS_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3404
      break;
hf@deer.(none)'s avatar
hf@deer.(none) committed
3405
    mysqld_list_processes(thd,
3406 3407 3408 3409
			  (thd->security_ctx->master_access & PROCESS_ACL ?
                           NullS :
                           thd->security_ctx->priv_user),
                          lex->verbose);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3410
    break;
3411 3412
  case SQLCOM_SHOW_STORAGE_ENGINES:
    res= mysqld_show_storage_engines(thd);
3413 3414 3415 3416 3417 3418 3419
    break;
  case SQLCOM_SHOW_PRIVILEGES:
    res= mysqld_show_privileges(thd);
    break;
  case SQLCOM_SHOW_COLUMN_TYPES:
    res= mysqld_show_column_types(thd);
    break;
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
3420 3421
  case SQLCOM_SHOW_LOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3422 3423
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0));	/* purecov: inspected */
3424
    goto error;
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
3425 3426
#else
    {
3427
      if (grant_option && check_access(thd, FILE_ACL, any_db,0,0,0,0))
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
3428 3429 3430 3431
	goto error;
      res= mysqld_show_logs(thd);
      break;
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3432 3433
#endif
  case SQLCOM_CHANGE_DB:
3434 3435
    if (!mysql_change_db(thd,select_lex->db,FALSE))
      send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3436
    break;
3437

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3438 3439
  case SQLCOM_LOAD:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3440
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3441
    uint privilege= (lex->duplicates == DUP_REPLACE ?
3442 3443
		     INSERT_ACL | DELETE_ACL : INSERT_ACL) |
                    (lex->local_file ? 0 : FILE_ACL);
3444

3445
    if (lex->local_file)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3446
    {
3447
      if (!(thd->client_capabilities & CLIENT_LOCAL_FILES) ||
3448
          !opt_local_infile)
3449
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3450
	my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND), MYF(0));
3451 3452
	goto error;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3453
    }
3454 3455 3456 3457

    if (check_one_table_access(thd, privilege, all_tables))
      goto error;

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3458
    res= mysql_load(thd, lex->exchange, first_table, lex->field_list,
3459
                    lex->update_list, lex->value_list, lex->duplicates,
3460
                    lex->ignore, (bool) lex->local_file);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3461 3462
    break;
  }
3463

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3464
  case SQLCOM_SET_OPTION:
3465 3466
  {
    List<set_var_base> *lex_var_list= &lex->var_list;
3467
    if ((check_table_access(thd, SELECT_ACL, all_tables, 0) ||
3468 3469
	 open_and_lock_tables(thd, all_tables)))
      goto error;
3470 3471
    if (lex->one_shot_set && not_all_support_one_shot(lex_var_list))
    {
3472 3473
      my_error(ER_RESERVED_SYNTAX, MYF(0), "SET ONE_SHOT");
      goto error;
3474 3475 3476 3477 3478 3479 3480 3481
    }
    if (!(res= sql_set_variables(thd, lex_var_list)))
    {
      /*
        If the previous command was a SET ONE_SHOT, we don't want to forget
        about the ONE_SHOT property of that SET. So we use a |= instead of = .
      */
      thd->one_shot_set|= lex->one_shot_set;
3482
      send_ok(thd);
3483
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3484
    break;
3485
  }
3486

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3487
  case SQLCOM_UNLOCK_TABLES:
3488 3489 3490 3491 3492 3493
    /*
      It is critical for mysqldump --single-transaction --master-data that
      UNLOCK TABLES does not implicitely commit a connection which has only
      done FLUSH TABLES WITH READ LOCK + BEGIN. If this assumption becomes
      false, mysqldump will not work.
    */
3494
    unlock_locked_tables(thd);
3495 3496
    if (thd->options & OPTION_TABLE_LOCK)
    {
3497
      end_active_trans(thd);
3498
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3499 3500
    }
    if (thd->global_read_lock)
3501
      unlock_global_read_lock(thd);
3502
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3503 3504
    break;
  case SQLCOM_LOCK_TABLES:
3505
    unlock_locked_tables(thd);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3506
    if (check_db_used(thd, all_tables) || end_active_trans(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3507
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3508
    if (check_table_access(thd, LOCK_TABLES_ACL | SELECT_ACL, all_tables, 0))
3509
      goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3510
    thd->in_lock_tables=1;
3511
    thd->options|= OPTION_TABLE_LOCK;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3512

3513
    if (!(res= simple_open_n_lock_tables(thd, all_tables)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3514
    {
3515 3516
#ifdef HAVE_QUERY_CACHE
      if (thd->variables.query_cache_wlock_invalidate)
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3517
	query_cache.invalidate_locked_for_write(first_table);
3518
#endif /*HAVE_QUERY_CACHE*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3519 3520
      thd->locked_tables=thd->lock;
      thd->lock=0;
3521
      send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3522
    }
3523 3524
    else
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3525 3526 3527
    thd->in_lock_tables=0;
    break;
  case SQLCOM_CREATE_DB:
3528
  {
3529 3530 3531 3532 3533
    if (end_active_trans(thd))
    {
      res= -1;
      break;
    }
3534
    char *alias;
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
3535
    if (!(alias=thd->strdup(lex->name)) || check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3536
    {
3537
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3538 3539
      break;
    }
3540 3541 3542
    /*
      If in a slave thread :
      CREATE DATABASE DB was certainly not preceded by USE DB.
3543
      For that reason, db_ok() in sql/slave.cc did not check the
3544 3545 3546
      do_db/ignore_db. And as this query involves no tables, tables_ok()
      above was not called. So we have to check rules again here.
    */
3547
#ifdef HAVE_REPLICATION
3548
    if (thd->slave_thread &&
3549 3550
	(!db_ok(lex->name, replicate_do_db, replicate_ignore_db) ||
	 !db_ok_with_wild_table(lex->name)))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3551
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3552
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
3553
      break;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3554
    }
3555
#endif
3556
    if (check_access(thd,CREATE_ACL,lex->name,0,1,0,is_schema_db(lex->name)))
3557
      break;
monty@mysql.com's avatar
monty@mysql.com committed
3558
    res= mysql_create_db(thd,(lower_case_table_names == 2 ? alias : lex->name),
monty@mysql.com's avatar
monty@mysql.com committed
3559
			 &lex->create_info, 0);
3560 3561
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3562
  case SQLCOM_DROP_DB:
3563
  {
3564 3565 3566 3567 3568
    if (end_active_trans(thd))
    {
      res= -1;
      break;
    }
3569
    if (check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3570
    {
3571
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3572 3573
      break;
    }
3574 3575 3576 3577 3578 3579 3580
    /*
      If in a slave thread :
      DROP DATABASE DB may not be preceded by USE DB.
      For that reason, maybe db_ok() in sql/slave.cc did not check the 
      do_db/ignore_db. And as this query involves no tables, tables_ok()
      above was not called. So we have to check rules again here.
    */
3581
#ifdef HAVE_REPLICATION
3582 3583 3584
    if (thd->slave_thread && 
	(!db_ok(lex->name, replicate_do_db, replicate_ignore_db) ||
	 !db_ok_with_wild_table(lex->name)))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3585
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3586
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
3587
      break;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3588
    }
3589
#endif
3590
    if (check_access(thd,DROP_ACL,lex->name,0,1,0,is_schema_db(lex->name)))
3591
      break;
3592 3593
    if (thd->locked_tables || thd->active_transaction())
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3594 3595
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3596 3597
      goto error;
    }
3598
    res= mysql_rm_db(thd, lex->name, lex->drop_if_exists, 0);
3599 3600
    break;
  }
3601 3602
  case SQLCOM_ALTER_DB:
  {
3603 3604
    char *db= lex->name ? lex->name : thd->db;
    if (!db)
3605
    {
monty@mishka.local's avatar
monty@mishka.local committed
3606 3607
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
      break;
3608 3609
    }
    if (!strip_sp(db) || check_db_name(db))
3610
    {
3611
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
3612 3613
      break;
    }
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3614 3615 3616
    /*
      If in a slave thread :
      ALTER DATABASE DB may not be preceded by USE DB.
3617
      For that reason, maybe db_ok() in sql/slave.cc did not check the
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3618 3619 3620 3621
      do_db/ignore_db. And as this query involves no tables, tables_ok()
      above was not called. So we have to check rules again here.
    */
#ifdef HAVE_REPLICATION
3622
    if (thd->slave_thread &&
3623 3624
	(!db_ok(db, replicate_do_db, replicate_ignore_db) ||
	 !db_ok_with_wild_table(db)))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3625
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3626
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3627 3628 3629
      break;
    }
#endif
3630
    if (check_access(thd, ALTER_ACL, db, 0, 1, 0, is_schema_db(db)))
3631 3632 3633
      break;
    if (thd->locked_tables || thd->active_transaction())
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3634 3635
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3636 3637
      goto error;
    }
3638
    res= mysql_alter_db(thd, db, &lex->create_info);
3639 3640
    break;
  }
3641 3642 3643 3644
  case SQLCOM_SHOW_CREATE_DB:
  {
    if (!strip_sp(lex->name) || check_db_name(lex->name))
    {
3645
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
3646 3647
      break;
    }
3648
    if (check_access(thd,SELECT_ACL,lex->name,0,1,0,is_schema_db(lex->name)))
3649
      break;
3650
    res=mysqld_show_create_db(thd,lex->name,&lex->create_info);
3651 3652
    break;
  }
monty@mysql.com's avatar
monty@mysql.com committed
3653
  case SQLCOM_CREATE_FUNCTION:                  // UDF function
monty@mysql.com's avatar
monty@mysql.com committed
3654
  {
3655
    if (check_access(thd,INSERT_ACL,"mysql",0,1,0,0))
monty@mysql.com's avatar
monty@mysql.com committed
3656
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3657
#ifdef HAVE_DLOPEN
3658
    if (sp_find_function(thd, lex->spname))
monty@mysql.com's avatar
monty@mysql.com committed
3659
    {
3660
      my_error(ER_UDF_EXISTS, MYF(0), lex->spname->m_name.str);
monty@mysql.com's avatar
monty@mysql.com committed
3661 3662
      goto error;
    }
3663
    if (!(res = mysql_create_function(thd, &lex->udf)))
monty@mysql.com's avatar
monty@mysql.com committed
3664
      send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3665
#else
hf@deer.(none)'s avatar
hf@deer.(none) committed
3666
    my_error(ER_CANT_OPEN_LIBRARY, MYF(0), lex->udf.dl, 0, "feature disabled");
3667
    res= TRUE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3668 3669
#endif
    break;
monty@mysql.com's avatar
monty@mysql.com committed
3670
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
3671
#ifndef NO_EMBEDDED_ACCESS_CHECKS
3672 3673
  case SQLCOM_CREATE_USER:
  {
3674
    if (check_access(thd, INSERT_ACL, "mysql", 0, 1, 1, 0) &&
3675
        check_global_access(thd,CREATE_USER_ACL))
3676 3677 3678 3679 3680
      break;
    if (!(res= mysql_create_user(thd, lex->users_list)))
    {
      if (mysql_bin_log.is_open())
      {
monty@mysql.com's avatar
monty@mysql.com committed
3681
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3682 3683 3684 3685 3686 3687
        mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
3688 3689
  case SQLCOM_DROP_USER:
  {
3690
    if (check_access(thd, DELETE_ACL, "mysql", 0, 1, 1, 0) &&
3691
        check_global_access(thd,CREATE_USER_ACL))
3692 3693 3694 3695 3696
      break;
    if (!(res= mysql_drop_user(thd, lex->users_list)))
    {
      if (mysql_bin_log.is_open())
      {
monty@mysql.com's avatar
monty@mysql.com committed
3697
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3698 3699 3700 3701 3702 3703 3704 3705
        mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
  case SQLCOM_RENAME_USER:
  {
3706
    if (check_access(thd, UPDATE_ACL, "mysql", 0, 1, 1, 0) &&
3707
        check_global_access(thd,CREATE_USER_ACL))
3708 3709 3710 3711 3712
      break;
    if (!(res= mysql_rename_user(thd, lex->users_list)))
    {
      if (mysql_bin_log.is_open())
      {
monty@mysql.com's avatar
monty@mysql.com committed
3713
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3714
        mysql_bin_log.write(&qinfo);
3715 3716 3717 3718 3719 3720 3721
      }
      send_ok(thd);
    }
    break;
  }
  case SQLCOM_REVOKE_ALL:
  {
3722
    if (check_access(thd, UPDATE_ACL, "mysql", 0, 1, 1, 0) &&
3723
        check_global_access(thd,CREATE_USER_ACL))
3724 3725 3726 3727 3728
      break;
    if (!(res = mysql_revoke_all(thd, lex->users_list)))
    {
      if (mysql_bin_log.is_open())
      {
3729
	Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3730 3731 3732 3733 3734 3735
	mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
3736 3737 3738 3739
  case SQLCOM_REVOKE:
  case SQLCOM_GRANT:
  {
    if (check_access(thd, lex->grant | lex->grant_tot_col | GRANT_ACL,
serg@serg.mylan's avatar
serg@serg.mylan committed
3740
		     first_table ?  first_table->db : select_lex->db,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3741
		     first_table ? &first_table->grant.privilege : 0,
3742 3743 3744
		     first_table ? 0 : 1, 0,
                     first_table ? (bool) first_table->schema_table :
                     select_lex->db ? is_schema_db(select_lex->db) : 0))
3745 3746
      goto error;

3747
    if (thd->security_ctx->user)              // If not replication
3748 3749
    {
      LEX_USER *user;
3750 3751
      uint counter;

3752
      List_iterator <LEX_USER> user_list(lex->users_list);
3753
      while ((user= user_list++))
3754
      {
3755 3756 3757 3758 3759 3760 3761 3762
        if (specialflag & SPECIAL_NO_RESOLVE &&
            hostname_requires_resolving(user->host.str))
          push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                              ER_WARN_HOSTNAME_WONT_WORK,
                              ER(ER_WARN_HOSTNAME_WONT_WORK),
                              user->host.str);
        // Are we trying to change a password of another user
        DBUG_ASSERT(user->host.str != 0);
3763
        if (strcmp(thd->security_ctx->user, user->user.str) ||
3764
            my_strcasecmp(system_charset_info,
3765
                          user->host.str, thd->security_ctx->host_or_ip))
3766 3767 3768
        {
          // TODO: use check_change_password()
          if (check_acl_user(user, &counter) && user->password.str &&
3769
              check_access(thd, UPDATE_ACL,"mysql",0,1,1,0))
3770 3771 3772 3773 3774 3775
          {
            my_message(ER_PASSWORD_NOT_ALLOWED,
                       ER(ER_PASSWORD_NOT_ALLOWED), MYF(0));
            goto error;
          }
        }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
3776 3777
      }
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3778
    if (first_table)
3779
    {
3780 3781
      if (lex->type == TYPE_ENUM_PROCEDURE ||
          lex->type == TYPE_ENUM_FUNCTION)
3782 3783 3784 3785 3786
      {
        uint grants= lex->all_privileges 
		   ? (PROC_ACLS & ~GRANT_ACL) | (lex->grant & GRANT_ACL)
		   : lex->grant;
        if (grant_option && 
3787 3788
	    check_grant_routine(thd, grants | GRANT_ACL, all_tables,
                                lex->type == TYPE_ENUM_PROCEDURE, 0))
3789
	  goto error;
3790 3791 3792 3793
        res= mysql_routine_grant(thd, all_tables,
                                 lex->type == TYPE_ENUM_PROCEDURE, 
                                 lex->users_list, grants,
                                 lex->sql_command == SQLCOM_REVOKE, 0);
3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806
      }
      else
      {
	if (grant_option && check_grant(thd,
					(lex->grant | lex->grant_tot_col |
					 GRANT_ACL),
					all_tables, 0, UINT_MAX, 0))
	  goto error;
        res= mysql_table_grant(thd, all_tables, lex->users_list,
			       lex->columns, lex->grant,
			       lex->sql_command == SQLCOM_REVOKE);
      }
      if (!res && mysql_bin_log.is_open())
3807
      {
pem@mysql.com's avatar
pem@mysql.com committed
3808
        thd->clear_error();
monty@mysql.com's avatar
monty@mysql.com committed
3809
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3810
        mysql_bin_log.write(&qinfo);
3811 3812 3813 3814
      }
    }
    else
    {
3815
      if (lex->columns.elements || lex->type)
3816
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3817 3818
	my_message(ER_ILLEGAL_GRANT_FOR_TABLE, ER(ER_ILLEGAL_GRANT_FOR_TABLE),
                   MYF(0));
3819
        goto error;
3820 3821 3822 3823 3824 3825 3826 3827
      }
      else
	res = mysql_grant(thd, select_lex->db, lex->users_list, lex->grant,
			  lex->sql_command == SQLCOM_REVOKE);
      if (!res)
      {
	if (mysql_bin_log.is_open())
	{
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3828
          thd->clear_error();
3829
	  Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3830 3831
	  mysql_bin_log.write(&qinfo);
	}
3832
	if (lex->sql_command == SQLCOM_GRANT)
3833
	{
3834 3835 3836
	  List_iterator <LEX_USER> str_list(lex->users_list);
	  LEX_USER *user;
	  while ((user=str_list++))
monty@mysql.com's avatar
monty@mysql.com committed
3837
	    reset_mqh(user);
3838
	}
3839 3840 3841 3842
      }
    }
    break;
  }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
3843
#endif /*!NO_EMBEDDED_ACCESS_CHECKS*/
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
3844
  case SQLCOM_RESET:
3845 3846 3847
    /*
      RESET commands are never written to the binary log, so we have to
      initialize this variable because RESET shares the same code as FLUSH
3848 3849 3850 3851
    */
    lex->no_write_to_binlog= 1;
  case SQLCOM_FLUSH:
  {
3852
    bool write_to_binlog;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3853
    if (check_global_access(thd,RELOAD_ACL) || check_db_used(thd, all_tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3854
      goto error;
3855 3856 3857 3858
    /*
      reload_acl_and_cache() will tell us if we are allowed to write to the
      binlog or not.
    */
3859
    if (!reload_acl_and_cache(thd, lex->type, first_table, &write_to_binlog))
3860 3861 3862 3863 3864 3865 3866 3867 3868
    {
      /*
        We WANT to write and we CAN write.
        ! we write after unlocking the table.
      */
      if (!lex->no_write_to_binlog && write_to_binlog)
      {
        if (mysql_bin_log.is_open())
        {
3869
          Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3870 3871 3872 3873 3874
          mysql_bin_log.write(&qinfo);
        }
      }
      send_ok(thd);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3875
    break;
3876
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3877
  case SQLCOM_KILL:
3878 3879 3880
  {
    Item *it= (Item *)lex->value_list.head();

3881
    if ((!it->fixed && it->fix_fields(lex->thd, &it)) || it->check_cols(1))
3882 3883 3884 3885 3886 3887
    {
      my_message(ER_SET_CONSTANTS_ONLY, ER(ER_SET_CONSTANTS_ONLY),
		 MYF(0));
      goto error;
    }
    kill_one_thread(thd, (ulong)it->val_int(), lex->type & ONLY_KILL_QUERY);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3888
    break;
3889
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
3890
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3891
  case SQLCOM_SHOW_GRANTS:
3892 3893
    if ((thd->security_ctx->priv_user &&
	 !strcmp(thd->security_ctx->priv_user, lex->grant_user->user.str)) ||
3894
	!check_access(thd, SELECT_ACL, "mysql",0,1,0,0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3895 3896 3897 3898
    {
      res = mysql_show_grants(thd,lex->grant_user);
    }
    break;
hf@deer.(none)'s avatar
hf@deer.(none) committed
3899
#endif
3900
  case SQLCOM_HA_OPEN:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3901 3902 3903
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_table_access(thd, SELECT_ACL, all_tables, 0))
3904
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
3905
    res= mysql_ha_open(thd, first_table, 0);
3906 3907
    break;
  case SQLCOM_HA_CLOSE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3908 3909
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables))
3910
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3911
    res= mysql_ha_close(thd, first_table);
3912 3913
    break;
  case SQLCOM_HA_READ:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3914
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3915 3916 3917 3918 3919
    /*
      There is no need to check for table permissions here, because
      if a user has no permissions to read a table, he won't be
      able to open it (with SQLCOM_HA_OPEN) in the first place.
    */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3920
    if (check_db_used(thd, all_tables))
3921
      goto error;
3922
    unit->set_limit(select_lex);
3923
    res= mysql_ha_read(thd, first_table, lex->ha_read_mode, lex->ident.str,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3924
                       lex->insert_list, lex->ha_rkey_mode, select_lex->where,
3925
                       unit->select_limit_cnt, unit->offset_limit_cnt);
3926 3927
    break;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3928
  case SQLCOM_BEGIN:
3929
    if (begin_trans(thd))
3930
      goto error;
serg@serg.mylan's avatar
serg@serg.mylan committed
3931
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3932 3933
    break;
  case SQLCOM_COMMIT:
3934
    if (end_trans(thd, lex->tx_release ? COMMIT_RELEASE :
serg@serg.mylan's avatar
serg@serg.mylan committed
3935
                              lex->tx_chain ? COMMIT_AND_CHAIN : COMMIT))
3936
      goto error;
3937
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3938 3939
    break;
  case SQLCOM_ROLLBACK:
3940
    if (end_trans(thd, lex->tx_release ? ROLLBACK_RELEASE :
serg@serg.mylan's avatar
serg@serg.mylan committed
3941
                              lex->tx_chain ? ROLLBACK_AND_CHAIN : ROLLBACK))
3942
      goto error;
3943
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3944
    break;
serg@serg.mylan's avatar
serg@serg.mylan committed
3945
  case SQLCOM_RELEASE_SAVEPOINT:
serg@serg.mylan's avatar
serg@serg.mylan committed
3946
  {
3947 3948
    SAVEPOINT *sv;
    for (sv=thd->transaction.savepoints; sv; sv=sv->prev)
serg@serg.mylan's avatar
serg@serg.mylan committed
3949 3950 3951
    {
      if (my_strnncoll(system_charset_info,
                       (uchar *)lex->ident.str, lex->ident.length,
3952
                       (uchar *)sv->name, sv->length) == 0)
serg@serg.mylan's avatar
serg@serg.mylan committed
3953 3954
        break;
    }
3955
    if (sv)
serg@serg.mylan's avatar
serg@serg.mylan committed
3956
    {
3957
      if (ha_release_savepoint(thd, sv))
serg@serg.mylan's avatar
serg@serg.mylan committed
3958
        res= TRUE; // cannot happen
serg@serg.mylan's avatar
serg@serg.mylan committed
3959 3960
      else
        send_ok(thd);
3961
      thd->transaction.savepoints=sv->prev;
serg@serg.mylan's avatar
serg@serg.mylan committed
3962
    }
3963
    else
serg@serg.mylan's avatar
serg@serg.mylan committed
3964
      my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3965
    break;
serg@serg.mylan's avatar
serg@serg.mylan committed
3966
  }
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3967
  case SQLCOM_ROLLBACK_TO_SAVEPOINT:
serg@serg.mylan's avatar
serg@serg.mylan committed
3968
  {
3969 3970
    SAVEPOINT *sv;
    for (sv=thd->transaction.savepoints; sv; sv=sv->prev)
3971 3972 3973
    {
      if (my_strnncoll(system_charset_info,
                       (uchar *)lex->ident.str, lex->ident.length,
3974
                       (uchar *)sv->name, sv->length) == 0)
3975 3976
        break;
    }
3977
    if (sv)
3978
    {
3979
      if (ha_rollback_to_savepoint(thd, sv))
3980 3981
        res= TRUE; // cannot happen
      else
serg@serg.mylan's avatar
serg@serg.mylan committed
3982 3983 3984 3985 3986 3987 3988 3989
      {
        if ((thd->options & OPTION_STATUS_NO_TRANS_UPDATE) &&
            !thd->slave_thread)
          push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                       ER_WARNING_NOT_COMPLETE_ROLLBACK,
                       ER(ER_WARNING_NOT_COMPLETE_ROLLBACK));
        send_ok(thd);
      }
3990
      thd->transaction.savepoints=sv;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3991 3992
    }
    else
3993
      my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3994
    break;
3995
  }
3996
  case SQLCOM_SAVEPOINT:
3997 3998
    if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) ||
        !opt_using_transactions)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3999
      send_ok(thd);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
4000
    else
4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038
    {
      SAVEPOINT **sv, *newsv;
      for (sv=&thd->transaction.savepoints; *sv; sv=&(*sv)->prev)
      {
        if (my_strnncoll(system_charset_info,
                         (uchar *)lex->ident.str, lex->ident.length,
                         (uchar *)(*sv)->name, (*sv)->length) == 0)
          break;
      }
      if (*sv) /* old savepoint of the same name exists */
      {
        newsv=*sv;
        ha_release_savepoint(thd, *sv); // it cannot fail
        *sv=(*sv)->prev;
      }
      else if ((newsv=(SAVEPOINT *) alloc_root(&thd->transaction.mem_root,
                                               savepoint_alloc_size)) == 0)
      {
        my_error(ER_OUT_OF_RESOURCES, MYF(0));
        break;
      }
      newsv->name=strmake_root(&thd->transaction.mem_root,
                               lex->ident.str, lex->ident.length);
      newsv->length=lex->ident.length;
      /*
        if we'll get an error here, don't add new savepoint to the list.
        we'll lose a little bit of memory in transaction mem_root, but it'll
        be free'd when transaction ends anyway
      */
      if (ha_savepoint(thd, newsv))
        res= TRUE;
      else
      {
        newsv->prev=thd->transaction.savepoints;
        thd->transaction.savepoints=newsv;
        send_ok(thd);
      }
    }
4039
    break;
4040 4041
  case SQLCOM_CREATE_PROCEDURE:
  case SQLCOM_CREATE_SPFUNCTION:
monty@mysql.com's avatar
monty@mysql.com committed
4042
  {
4043
    uint namelen;
4044
    char *name, *db;
4045
    int result;
4046

4047
    DBUG_ASSERT(lex->sphead != 0);
4048

4049 4050
    if (check_access(thd, CREATE_PROC_ACL, lex->sphead->m_db.str, 0, 0, 0,
                     is_schema_db(lex->sphead->m_db.str)))
4051 4052 4053 4054 4055 4056
    {
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
    }

4057 4058 4059
    if (end_active_trans(thd)) 
      goto error;

4060 4061 4062
    if (!lex->sphead->m_db.str || !lex->sphead->m_db.str[0])
    {
      lex->sphead->m_db.length= strlen(thd->db);
serg@serg.mylan's avatar
serg@serg.mylan committed
4063 4064
      lex->sphead->m_db.str= strmake_root(thd->mem_root, thd->db,
                                           lex->sphead->m_db.length);
4065
    }
4066 4067

    name= lex->sphead->name(&namelen);
4068
#ifdef HAVE_DLOPEN
monty@mysql.com's avatar
monty@mysql.com committed
4069 4070 4071
    if (lex->sphead->m_type == TYPE_ENUM_FUNCTION)
    {
      udf_func *udf = find_udf(name, namelen);
4072

monty@mysql.com's avatar
monty@mysql.com committed
4073
      if (udf)
4074
      {
4075
	my_error(ER_UDF_EXISTS, MYF(0), name);
4076
	delete lex->sphead;
4077
	lex->sphead= 0;
4078
	goto error;
4079
      }
monty@mysql.com's avatar
monty@mysql.com committed
4080 4081 4082
    }
#endif
    if (lex->sphead->m_type == TYPE_ENUM_FUNCTION &&
4083
	!(lex->sphead->m_flags & sp_head::HAS_RETURN))
monty@mysql.com's avatar
monty@mysql.com committed
4084
    {
4085
      my_error(ER_SP_NORETURN, MYF(0), name);
monty@mysql.com's avatar
monty@mysql.com committed
4086
      delete lex->sphead;
4087
      lex->sphead= 0;
monty@mysql.com's avatar
monty@mysql.com committed
4088 4089 4090
      goto error;
    }

4091 4092
    name= thd->strdup(name); 
    db= thd->strmake(lex->sphead->m_db.str, lex->sphead->m_db.length);
4093
    res= (result= lex->sphead->create(thd));
4094 4095
    if (result == SP_OK)
    {
4096
      lex->unit.cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
4097 4098
      delete lex->sphead;
      lex->sphead= 0;
4099
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4100
      /* only add privileges if really neccessary */
4101
      if (sp_automatic_privileges && !opt_noacl &&
4102 4103 4104
          check_routine_access(thd, DEFAULT_CREATE_PROC_ACLS,
      			       db, name,
                               lex->sql_command == SQLCOM_CREATE_PROCEDURE, 1))
4105 4106
      {
        close_thread_tables(thd);
4107 4108
        if (sp_grant_privileges(thd, db, name, 
                                lex->sql_command == SQLCOM_CREATE_PROCEDURE))
4109 4110 4111 4112
          push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
	  	       ER_PROC_AUTO_GRANT_FAIL,
		       ER(ER_PROC_AUTO_GRANT_FAIL));
      }
4113
#endif
4114
      send_ok(thd);
4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134
    }
    else
    {
      switch (result) {
      case SP_WRITE_ROW_FAILED:
	my_error(ER_SP_ALREADY_EXISTS, MYF(0), SP_TYPE_STRING(lex), name);
	break;
      case SP_NO_DB_ERROR:
	my_error(ER_BAD_DB_ERROR, MYF(0), lex->sphead->m_db.str);
	break;
      case SP_BAD_IDENTIFIER:
	my_error(ER_TOO_LONG_IDENT, MYF(0), name);
	break;
      case SP_BODY_TOO_LONG:
	my_error(ER_TOO_LONG_BODY, MYF(0), name);
	break;
      default:
	my_error(ER_SP_STORE_FAILED, MYF(0), SP_TYPE_STRING(lex), name);
	break;
      }
4135
      lex->unit.cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
4136 4137 4138
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
4139
    }
monty@mysql.com's avatar
monty@mysql.com committed
4140 4141
    break;
  }
4142 4143 4144 4145
  case SQLCOM_CALL:
    {
      sp_head *sp;

4146 4147 4148 4149 4150 4151 4152 4153 4154
      /*
        This will cache all SP and SF and open and lock all tables
        required for execution.
      */
      if (check_table_access(thd, SELECT_ACL, all_tables, 0) ||
	  open_and_lock_tables(thd, all_tables))
       goto error;

      /*
4155 4156
        By this moment all needed SPs should be in cache so no need to look 
        into DB. 
4157 4158
      */
      if (!(sp= sp_find_procedure(thd, lex->spname, TRUE)))
4159
      {
4160
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "PROCEDURE",
4161
                 lex->spname->m_qname.str);
4162
	goto error;
4163 4164 4165
      }
      else
      {
4166
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4167
	Security_context *save_ctx;
4168
#endif
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4169
	ha_rows select_limit;
monty@mysql.com's avatar
monty@mysql.com committed
4170 4171
        /* bits that should be cleared in thd->server_status */
	uint bits_to_be_cleared= 0;
4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183
        /*
          Check that the stored procedure doesn't contain Dynamic SQL
          and doesn't return result sets: such stored procedures can't
          be called from a function or trigger.
        */
        if (thd->in_sub_stmt)
        {
          const char *where= (thd->in_sub_stmt & SUB_STMT_TRIGGER ?
                              "trigger" : "function");
          if (sp->is_not_allowed_in_function(where))
            goto error;
        }
4184

4185
#ifndef EMBEDDED_LIBRARY
4186 4187
	my_bool nsok= thd->net.no_send_ok;
	thd->net.no_send_ok= TRUE;
4188
#endif
4189
	if (sp->m_flags & sp_head::MULTI_RESULTS)
4190
	{
4191
	  if (! (thd->client_capabilities & CLIENT_MULTI_RESULTS))
4192
	  {
4193 4194 4195 4196
            /*
              The client does not support multiple result sets being sent
              back
            */
4197
	    my_error(ER_SP_BADSELECT, MYF(0), sp->m_qname.str);
4198 4199 4200 4201 4202
#ifndef EMBEDDED_LIBRARY
	    thd->net.no_send_ok= nsok;
#endif
	    goto error;
	  }
monty@mysql.com's avatar
monty@mysql.com committed
4203 4204 4205 4206 4207 4208 4209
          /*
            If SERVER_MORE_RESULTS_EXISTS is not set,
            then remember that it should be cleared
          */
	  bits_to_be_cleared= (~thd->server_status &
                               SERVER_MORE_RESULTS_EXISTS);
	  thd->server_status|= SERVER_MORE_RESULTS_EXISTS;
4210 4211
	}

4212
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4213 4214 4215
	if (check_routine_access(thd, EXECUTE_ACL,
				 sp->m_db.str, sp->m_name.str, TRUE, 0) ||
          sp_change_security_context(thd, sp, &save_ctx))
4216 4217 4218 4219 4220 4221
	{
#ifndef EMBEDDED_LIBRARY
	  thd->net.no_send_ok= nsok;
#endif
	  goto error;
	}
4222 4223 4224
	if (save_ctx &&
            check_routine_access(thd, EXECUTE_ACL,
                                 sp->m_db.str, sp->m_name.str, TRUE, 0))
4225 4226 4227 4228
	{
#ifndef EMBEDDED_LIBRARY
	  thd->net.no_send_ok= nsok;
#endif
4229
	  sp_restore_security_context(thd, save_ctx);
4230 4231 4232
	  goto error;
	}

4233
#endif
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4234 4235
	select_limit= thd->variables.select_limit;
	thd->variables.select_limit= HA_POS_ERROR;
4236

4237
        thd->row_count_func= 0;
4238 4239
        
        /* 
4240
          We never write CALL statements into binlog:
4241 4242 4243 4244 4245
           - If the mode is non-prelocked, each statement will be logged
             separately.
           - If the mode is prelocked, the invoking statement will care
             about writing into binlog.
          So just execute the statement.
4246
        */
4247
	res= sp->execute_procedure(thd, &lex->value_list);
4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258
        if (mysql_bin_log.is_open() &&
            (sp->m_chistics->daccess == SP_CONTAINS_SQL ||
             sp->m_chistics->daccess == SP_MODIFIES_SQL_DATA))
        {
          if (res)
            push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_FAILED_ROUTINE_BREAK_BINLOG,
			 ER(ER_FAILED_ROUTINE_BREAK_BINLOG));
          else
            thd->clear_error();
        }
4259

4260 4261 4262
	/*
          If warnings have been cleared, we have to clear total_warn_count
          too, otherwise the clients get confused.
4263 4264 4265 4266
	 */
	if (thd->warn_list.is_empty())
	  thd->total_warn_count= 0;

pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4267
	thd->variables.select_limit= select_limit;
4268
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4269
	sp_restore_security_context(thd, save_ctx);
4270
#endif
4271

4272
#ifndef EMBEDDED_LIBRARY
4273
	thd->net.no_send_ok= nsok;
4274
#endif
monty@mysql.com's avatar
monty@mysql.com committed
4275
        thd->server_status&= ~bits_to_be_cleared;
4276

4277
	if (!res)
monty@mysql.com's avatar
monty@mysql.com committed
4278 4279
	  send_ok(thd, (ulong) (thd->row_count_func < 0 ? 0 :
                                thd->row_count_func));
4280 4281
	else
	  goto error;		// Substatement should already have sent error
4282
      }
4283
      break;
4284 4285
    }
  case SQLCOM_ALTER_PROCEDURE:
4286
  case SQLCOM_ALTER_FUNCTION:
4287
    {
4288
      int result;
4289 4290 4291 4292
      sp_head *sp;
      st_sp_chistics chistics;

      memcpy(&chistics, &lex->sp_chistics, sizeof(chistics));
4293
      if (lex->sql_command == SQLCOM_ALTER_PROCEDURE)
4294
	sp= sp_find_procedure(thd, lex->spname);
4295
      else
4296
	sp= sp_find_function(thd, lex->spname);
monty@mysql.com's avatar
monty@mysql.com committed
4297
      mysql_reset_errors(thd, 0);
4298
      if (! sp)
4299 4300 4301 4302 4303 4304 4305 4306 4307
      {
	if (lex->spname->m_db.str)
	  result= SP_KEY_NOT_FOUND;
	else
	{
	  my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
	  goto error;
	}
      }
4308 4309
      else
      {
4310 4311 4312
        if (check_routine_access(thd, ALTER_PROC_ACL, sp->m_db.str, 
				 sp->m_name.str,
                                 lex->sql_command == SQLCOM_ALTER_PROCEDURE, 0))
4313
	  goto error;
4314 4315 4316

        if (end_active_trans(thd)) 
          goto error;
4317
	memcpy(&lex->sp_chistics, &chistics, sizeof(lex->sp_chistics));
4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333
        if (!trust_routine_creators &&  mysql_bin_log.is_open() &&
            !sp->m_chistics->detistic &&
            (chistics.daccess == SP_CONTAINS_SQL ||
             chistics.daccess == SP_MODIFIES_SQL_DATA))
        {
          my_message(ER_BINLOG_UNSAFE_ROUTINE,
		     ER(ER_BINLOG_UNSAFE_ROUTINE), MYF(0));
          result= SP_INTERNAL_ERROR;
        }
        else
        {
          if (lex->sql_command == SQLCOM_ALTER_PROCEDURE)
            result= sp_update_procedure(thd, lex->spname, &lex->sp_chistics);
          else
            result= sp_update_function(thd, lex->spname, &lex->sp_chistics);
        }
4334
      }
4335
      switch (result)
4336
      {
4337
      case SP_OK:
4338 4339 4340 4341 4342 4343
        if (mysql_bin_log.is_open())
        {
          thd->clear_error();
          Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
          mysql_bin_log.write(&qinfo);
        }
4344
	send_ok(thd);
4345 4346
	break;
      case SP_KEY_NOT_FOUND:
4347 4348
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4349 4350
	goto error;
      default:
4351 4352
	my_error(ER_SP_CANT_ALTER, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4353
	goto error;
4354
      }
4355
      break;
4356 4357
    }
  case SQLCOM_DROP_PROCEDURE:
4358
  case SQLCOM_DROP_FUNCTION:
4359
    {
4360
      sp_head *sp;
4361
      int result;
4362
      char *db, *name;
4363

4364
      if (lex->sql_command == SQLCOM_DROP_PROCEDURE)
4365 4366 4367
	sp= sp_find_procedure(thd, lex->spname);
      else
	sp= sp_find_function(thd, lex->spname);
monty@mysql.com's avatar
monty@mysql.com committed
4368
      mysql_reset_errors(thd, 0);
4369
      if (sp)
4370
      {
4371 4372
        db= thd->strdup(sp->m_db.str);
	name= thd->strdup(sp->m_name.str);
4373 4374
	if (check_routine_access(thd, ALTER_PROC_ACL, db, name,
                                 lex->sql_command == SQLCOM_DROP_PROCEDURE, 0))
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
4375
          goto error;
4376 4377 4378

        if (end_active_trans(thd)) 
          goto error;
4379
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4380
	if (sp_automatic_privileges && !opt_noacl &&
4381 4382
	    sp_revoke_privileges(thd, db, name, 
                                 lex->sql_command == SQLCOM_DROP_PROCEDURE))
4383 4384 4385 4386 4387
	{
	  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
		       ER_PROC_AUTO_REVOKE_FAIL,
		       ER(ER_PROC_AUTO_REVOKE_FAIL));
	}
4388
#endif
4389
	if (lex->sql_command == SQLCOM_DROP_PROCEDURE)
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
4390
	  result= sp_drop_procedure(thd, lex->spname);
4391
	else
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
4392
	  result= sp_drop_function(thd, lex->spname);
4393 4394 4395
      }
      else
      {
4396
#ifdef HAVE_DLOPEN
4397 4398 4399 4400 4401 4402
	if (lex->sql_command == SQLCOM_DROP_FUNCTION)
	{
          udf_func *udf = find_udf(lex->spname->m_name.str,
                                   lex->spname->m_name.length);
          if (udf)
          {
4403
	    if (check_access(thd, DELETE_ACL, "mysql", 0, 1, 0, 0))
4404 4405
	      goto error;
	    if (!(res = mysql_drop_function(thd, &lex->spname->m_name)))
4406
	    {
4407 4408
	      send_ok(thd);
	      break;
4409 4410
	    }
	  }
4411
	}
4412
#endif
4413 4414 4415 4416 4417 4418 4419
	if (lex->spname->m_db.str)
	  result= SP_KEY_NOT_FOUND;
	else
	{
	  my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
	  goto error;
	}
4420
      }
4421 4422
      res= result;
      switch (result)
4423 4424
      {
      case SP_OK:
4425 4426 4427 4428 4429 4430
        if (mysql_bin_log.is_open())
        {
          thd->clear_error();
          Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
          mysql_bin_log.write(&qinfo);
        }
4431
	send_ok(thd);
4432 4433
	break;
      case SP_KEY_NOT_FOUND:
4434 4435
	if (lex->drop_if_exists)
	{
4436
	  push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
4437
			      ER_SP_DOES_NOT_EXIST, ER(ER_SP_DOES_NOT_EXIST),
4438
			      SP_COM_STRING(lex), lex->spname->m_name.str);
4439
	  res= FALSE;
4440 4441 4442
	  send_ok(thd);
	  break;
	}
4443 4444
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4445 4446
	goto error;
      default:
4447 4448
	my_error(ER_SP_DROP_FAILED, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4449
	goto error;
4450
      }
4451
      break;
4452
    }
4453 4454
  case SQLCOM_SHOW_CREATE_PROC:
    {
4455
      if (lex->spname->m_name.length > NAME_LEN)
4456
      {
4457
	my_error(ER_TOO_LONG_IDENT, MYF(0), lex->spname->m_name.str);
4458 4459
	goto error;
      }
4460
      if (sp_show_create_procedure(thd, lex->spname) != SP_OK)
4461
      {			/* We don't distinguish between errors for now */
4462 4463
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_name.str);
4464 4465 4466 4467 4468 4469
	goto error;
      }
      break;
    }
  case SQLCOM_SHOW_CREATE_FUNC:
    {
4470
      if (lex->spname->m_name.length > NAME_LEN)
4471
      {
4472
	my_error(ER_TOO_LONG_IDENT, MYF(0), lex->spname->m_name.str);
4473 4474
	goto error;
      }
4475
      if (sp_show_create_function(thd, lex->spname) != SP_OK)
4476
      {			/* We don't distinguish between errors for now */
4477 4478
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_name.str);
4479 4480 4481 4482 4483 4484
	goto error;
      }
      break;
    }
  case SQLCOM_SHOW_STATUS_PROC:
    {
4485
      res= sp_show_status_procedure(thd, (lex->wild ?
4486 4487 4488 4489 4490
					  lex->wild->ptr() : NullS));
      break;
    }
  case SQLCOM_SHOW_STATUS_FUNC:
    {
4491
      res= sp_show_status_function(thd, (lex->wild ? 
4492 4493 4494
					 lex->wild->ptr() : NullS));
      break;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4495 4496
  case SQLCOM_CREATE_VIEW:
    {
4497 4498 4499
      if (!(res= mysql_create_view(thd, thd->lex->create_view_mode)) &&
          mysql_bin_log.is_open())
      {
4500
        String buff;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4501 4502 4503 4504
        const LEX_STRING command[3]=
          {{(char *)STRING_WITH_LEN("CREATE ")},
           {(char *)STRING_WITH_LEN("ALTER ")},
           {(char *)STRING_WITH_LEN("CREATE OR REPLACE ")}};
4505
        thd->clear_error();
4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522

        buff.append(command[thd->lex->create_view_mode].str,
                    command[thd->lex->create_view_mode].length);
        view_store_options(thd, first_table, &buff);
        buff.append("VIEW ", 5);
        if (!first_table->current_db_used)
        {
          append_identifier(thd, &buff, first_table->db,
                            first_table->db_length);
          buff.append('.');
        }
        append_identifier(thd, &buff, first_table->table_name,
                          first_table->table_name_length);
        buff.append(" AS ", 4);
        buff.append(first_table->source.str, first_table->source.length);

        Query_log_event qinfo(thd, buff.ptr(), buff.length(), 0, FALSE);
4523 4524
        mysql_bin_log.write(&qinfo);
      }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4525 4526 4527 4528
      break;
    }
  case SQLCOM_DROP_VIEW:
    {
4529 4530 4531
      if (check_table_access(thd, DROP_ACL, all_tables, 0) ||
          end_active_trans(thd))
        goto error;
4532 4533 4534
      if (!(res= mysql_drop_view(thd, first_table, thd->lex->drop_mode)) &&
          mysql_bin_log.is_open())
      {
4535
        thd->clear_error();
4536 4537 4538
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
        mysql_bin_log.write(&qinfo);
      }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4539 4540
      break;
    }
4541 4542
  case SQLCOM_CREATE_TRIGGER:
  {
4543 4544 4545
    res= mysql_create_or_drop_trigger(thd, all_tables, 1);

    /* We don't care about trigger body after this point */
4546 4547 4548 4549 4550 4551 4552 4553 4554
    delete lex->sphead;
    lex->sphead= 0;
    break;
  }
  case SQLCOM_DROP_TRIGGER:
  {
    res= mysql_create_or_drop_trigger(thd, all_tables, 0);
    break;
  }
4555
  case SQLCOM_XA_START:
4556 4557
    if (thd->transaction.xid_state.xa_state == XA_IDLE &&
        thd->lex->xa_opt == XA_RESUME)
4558
    {
4559
      if (! thd->transaction.xid_state.xid.eq(thd->lex->xid))
4560 4561 4562 4563
      {
        my_error(ER_XAER_NOTA, MYF(0));
        break;
      }
4564
      thd->transaction.xid_state.xa_state=XA_ACTIVE;
4565 4566 4567
      send_ok(thd);
      break;
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
4568
    if (thd->lex->xa_opt != XA_NONE)
4569 4570 4571 4572
    { // JOIN is not supported yet. TODO
      my_error(ER_XAER_INVAL, MYF(0));
      break;
    }
4573
    if (thd->transaction.xid_state.xa_state != XA_NOTR)
4574
    {
4575
      my_error(ER_XAER_RMFAIL, MYF(0),
4576
               xa_state_names[thd->transaction.xid_state.xa_state]);
4577 4578 4579 4580 4581 4582 4583
      break;
    }
    if (thd->active_transaction() || thd->locked_tables)
    {
      my_error(ER_XAER_OUTSIDE, MYF(0));
      break;
    }
4584 4585 4586 4587 4588 4589 4590 4591 4592
    if (xid_cache_search(thd->lex->xid))
    {
      my_error(ER_XAER_DUPID, MYF(0));
      break;
    }
    DBUG_ASSERT(thd->transaction.xid_state.xid.is_null());
    thd->transaction.xid_state.xa_state=XA_ACTIVE;
    thd->transaction.xid_state.xid.set(thd->lex->xid);
    xid_cache_insert(&thd->transaction.xid_state);
4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604
    thd->options= ((thd->options & (ulong) ~(OPTION_STATUS_NO_TRANS_UPDATE)) |
                   OPTION_BEGIN);
    thd->server_status|= SERVER_STATUS_IN_TRANS;
    send_ok(thd);
    break;
  case SQLCOM_XA_END:
    /* fake it */
    if (thd->lex->xa_opt != XA_NONE)
    { // SUSPEND and FOR MIGRATE are not supported yet. TODO
      my_error(ER_XAER_INVAL, MYF(0));
      break;
    }
4605
    if (thd->transaction.xid_state.xa_state != XA_ACTIVE)
4606
    {
4607
      my_error(ER_XAER_RMFAIL, MYF(0),
4608
               xa_state_names[thd->transaction.xid_state.xa_state]);
4609 4610
      break;
    }
4611
    if (!thd->transaction.xid_state.xid.eq(thd->lex->xid))
4612 4613 4614 4615
    {
      my_error(ER_XAER_NOTA, MYF(0));
      break;
    }
4616
    thd->transaction.xid_state.xa_state=XA_IDLE;
4617 4618 4619
    send_ok(thd);
    break;
  case SQLCOM_XA_PREPARE:
4620
    if (thd->transaction.xid_state.xa_state != XA_IDLE)
4621
    {
4622
      my_error(ER_XAER_RMFAIL, MYF(0),
4623
               xa_state_names[thd->transaction.xid_state.xa_state]);
4624 4625
      break;
    }
4626
    if (!thd->transaction.xid_state.xid.eq(thd->lex->xid))
4627 4628 4629 4630 4631 4632 4633
    {
      my_error(ER_XAER_NOTA, MYF(0));
      break;
    }
    if (ha_prepare(thd))
    {
      my_error(ER_XA_RBROLLBACK, MYF(0));
4634 4635
      xid_cache_delete(&thd->transaction.xid_state);
      thd->transaction.xid_state.xa_state=XA_NOTR;
4636 4637
      break;
    }
4638
    thd->transaction.xid_state.xa_state=XA_PREPARED;
4639 4640 4641
    send_ok(thd);
    break;
  case SQLCOM_XA_COMMIT:
4642
    if (!thd->transaction.xid_state.xid.eq(thd->lex->xid))
4643
    {
4644 4645
      XID_STATE *xs=xid_cache_search(thd->lex->xid);
      if (!xs || xs->in_thd)
4646
        my_error(ER_XAER_NOTA, MYF(0));
serg@serg.mylan's avatar
serg@serg.mylan committed
4647
      else
4648 4649 4650
      {
        ha_commit_or_rollback_by_xid(thd->lex->xid, 1);
        xid_cache_delete(xs);
serg@serg.mylan's avatar
serg@serg.mylan committed
4651
        send_ok(thd);
4652
      }
4653 4654
      break;
    }
4655
    if (thd->transaction.xid_state.xa_state == XA_IDLE &&
monty@mysql.com's avatar
monty@mysql.com committed
4656
        thd->lex->xa_opt == XA_ONE_PHASE)
4657
    {
4658 4659 4660
      int r;
      if ((r= ha_commit(thd)))
        my_error(r == 1 ? ER_XA_RBROLLBACK : ER_XAER_RMERR, MYF(0));
4661 4662 4663
      else
        send_ok(thd);
    }
4664
    else if (thd->transaction.xid_state.xa_state == XA_PREPARED &&
monty@mysql.com's avatar
monty@mysql.com committed
4665
             thd->lex->xa_opt == XA_NONE)
4666
    {
4667 4668 4669
      if (wait_if_global_read_lock(thd, 0, 0))
      {
        ha_rollback(thd);
4670
        my_error(ER_XAER_RMERR, MYF(0));
4671
      }
4672
      else
4673 4674 4675 4676 4677 4678 4679
      {
        if (ha_commit_one_phase(thd, 1))
          my_error(ER_XAER_RMERR, MYF(0));
        else
          send_ok(thd);
        start_waiting_global_read_lock(thd);
      }
4680 4681 4682
    }
    else
    {
4683
      my_error(ER_XAER_RMFAIL, MYF(0),
4684
               xa_state_names[thd->transaction.xid_state.xa_state]);
4685 4686 4687 4688
      break;
    }
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
4689 4690
    xid_cache_delete(&thd->transaction.xid_state);
    thd->transaction.xid_state.xa_state=XA_NOTR;
4691 4692
    break;
  case SQLCOM_XA_ROLLBACK:
4693
    if (!thd->transaction.xid_state.xid.eq(thd->lex->xid))
4694
    {
4695 4696
      XID_STATE *xs=xid_cache_search(thd->lex->xid);
      if (!xs || xs->in_thd)
4697
        my_error(ER_XAER_NOTA, MYF(0));
serg@serg.mylan's avatar
serg@serg.mylan committed
4698
      else
4699 4700 4701
      {
        ha_commit_or_rollback_by_xid(thd->lex->xid, 0);
        xid_cache_delete(xs);
serg@serg.mylan's avatar
serg@serg.mylan committed
4702
        send_ok(thd);
4703
      }
4704 4705
      break;
    }
4706 4707
    if (thd->transaction.xid_state.xa_state != XA_IDLE &&
        thd->transaction.xid_state.xa_state != XA_PREPARED)
4708
    {
4709
      my_error(ER_XAER_RMFAIL, MYF(0),
4710
               xa_state_names[thd->transaction.xid_state.xa_state]);
4711 4712 4713 4714 4715 4716 4717 4718
      break;
    }
    if (ha_rollback(thd))
      my_error(ER_XAER_RMERR, MYF(0));
    else
      send_ok(thd);
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
4719 4720
    xid_cache_delete(&thd->transaction.xid_state);
    thd->transaction.xid_state.xa_state=XA_NOTR;
4721 4722
    break;
  case SQLCOM_XA_RECOVER:
4723
    res= mysql_xa_recover(thd);
4724 4725 4726
    break;
  default:
    DBUG_ASSERT(0);                             /* Impossible */
4727
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4728 4729
    break;
  }
monty@mysql.com's avatar
monty@mysql.com committed
4730
  thd->proc_info="query end";
4731
  /* Two binlog-related cleanups: */
4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744

  /*
    Reset system variables temporarily modified by SET ONE SHOT.

    Exception: If this is a SET, do nothing. This is to allow
    mysqlbinlog to print many SET commands (in this case we want the
    charset temp setting to live until the real query). This is also
    needed so that SET CHARACTER_SET_CLIENT... does not cancel itself
    immediately.
  */
  if (thd->one_shot_set && lex->sql_command != SQLCOM_SET_OPTION)
    reset_one_shot_variables(thd);

4745

4746 4747 4748 4749 4750
  /*
    The return value for ROW_COUNT() is "implementation dependent" if
    the statement is not DELETE, INSERT or UPDATE (or a CALL executing
    such a statement), but -1 is what JDBC and ODBC wants.
   */
4751
  if (lex->sql_command != SQLCOM_CALL && uc_update_queries[lex->sql_command]<2)
4752
    thd->row_count_func= -1;
4753
  goto cleanup;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4754 4755

error:
4756
  res= 1;
4757

4758
cleanup:
4759 4760 4761 4762 4763 4764 4765 4766
  if (unlikely(slave_fake_lock))
  {
    DBUG_PRINT("info",("undoing faked lock"));
    thd->lock= thd->locked_tables;
    thd->locked_tables= fake_prev_lock;
    if (thd->lock == thd->locked_tables)
      thd->lock= 0;
  }
4767
  DBUG_RETURN(res || thd->net.report_error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4768 4769 4770
}


bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4771 4772
/*
  Check grants for commands which work only with one table and all other
4773
  tables belonging to subselects or implicitly opened tables.
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4774

4775
  SYNOPSIS
monty@mysql.com's avatar
monty@mysql.com committed
4776 4777
    check_one_table_access()
    thd			Thread handler
4778
    privilege		requested privilege
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4779
    all_tables		global table list of query
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4780 4781 4782

  RETURN
    0 - OK
monty@mysql.com's avatar
monty@mysql.com committed
4783
    1 - access denied, error is sent to client
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4784 4785
*/

4786
bool check_one_table_access(THD *thd, ulong privilege, TABLE_LIST *all_tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4787
{
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4788
  if (check_access(thd, privilege, all_tables->db,
4789 4790
		   &all_tables->grant.privilege, 0, 0,
                   test(all_tables->schema_table)))
monty@mysql.com's avatar
monty@mysql.com committed
4791
    return 1;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4792

4793
  /* Show only 1 table for check_grant */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4794
  if (grant_option && check_grant(thd, privilege, all_tables, 0, 1, 0))
monty@mysql.com's avatar
monty@mysql.com committed
4795
    return 1;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4796

4797
  /* Check rights on tables of subselects and implictly opened tables */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4798
  TABLE_LIST *subselects_tables;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4799
  if ((subselects_tables= all_tables->next_global))
monty@mysql.com's avatar
monty@mysql.com committed
4800
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4801
    if ((check_table_access(thd, SELECT_ACL, subselects_tables, 0)))
monty@mysql.com's avatar
monty@mysql.com committed
4802 4803 4804
      return 1;
  }
  return 0;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4805 4806 4807
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
4808
/****************************************************************************
4809
  Get the user (global) and database privileges for all used tables
4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822

  NOTES
    The idea of EXTRA_ACL is that one will be granted access to the table if
    one has the asked privilege on any column combination of the table; For
    example to be able to check a table one needs to have SELECT privilege on
    any column of the table.

  RETURN
    0  ok
    1  If we can't get the privileges and we don't use table/column grants.

    save_priv	In this we store global and db level grants for the table
		Note that we don't store db level grants if the global grants
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
4823 4824
                is enough to satisfy the request and the global grants contains
                a SELECT grant.
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4825 4826 4827
****************************************************************************/

bool
4828
check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
4829
	     bool dont_check_global_grants, bool no_errors, bool schema_db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4830
{
4831
  Security_context *sctx= thd->security_ctx;
4832 4833
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  ulong db_access;
4834
  bool  db_is_pattern= test(want_access & GRANT_ACL);
4835 4836
#endif
  ulong dummy;
4837
  const char *db_name;
4838 4839
  DBUG_ENTER("check_access");
  DBUG_PRINT("enter",("db: %s  want_access: %lu  master_access: %lu",
4840
                      db ? db : "", want_access, sctx->master_access));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4841 4842 4843 4844 4845
  if (save_priv)
    *save_priv=0;
  else
    save_priv= &dummy;

4846
  if ((!db || !db[0]) && !thd->db && !dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4847
  {
4848
    DBUG_PRINT("error",("No database"));
4849
    if (!no_errors)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4850 4851
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR),
                 MYF(0));                       /* purecov: tested */
4852
    DBUG_RETURN(TRUE);				/* purecov: tested */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4853 4854
  }

4855 4856 4857 4858 4859 4860 4861
  db_name= db ? db : thd->db;
  if (schema_db)
  {
    if (want_access & ~(SELECT_ACL | EXTRA_ACL))
    {
      if (!no_errors)
        my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
4862 4863
                 sctx->priv_user,
                 sctx->priv_host, db_name);
4864 4865 4866 4867 4868 4869 4870 4871 4872
      DBUG_RETURN(TRUE);
    }
    else
    {
      *save_priv= SELECT_ACL;
      DBUG_RETURN(FALSE);
    }
  }

monty@mysql.com's avatar
monty@mysql.com committed
4873 4874 4875
#ifdef NO_EMBEDDED_ACCESS_CHECKS
  DBUG_RETURN(0);
#else
4876
  if ((sctx->master_access & want_access) == want_access)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4877
  {
4878 4879 4880 4881 4882
    /*
      If we don't have a global SELECT privilege, we have to get the database
      specific access rights to be able to handle queries of type
      UPDATE t1 SET a=1 WHERE b > 0
    */
4883 4884
    db_access= sctx->db_access;
    if (!(sctx->master_access & SELECT_ACL) &&
4885
	(db && (!thd->db || db_is_pattern || strcmp(db,thd->db))))
4886 4887 4888
      db_access=acl_get(sctx->host, sctx->ip, sctx->priv_user, db,
                        db_is_pattern);
    *save_priv=sctx->master_access | db_access;
4889
    DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4890
  }
4891
  if (((want_access & ~sctx->master_access) & ~(DB_ACLS | EXTRA_ACL)) ||
4892
      ! db && dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4893
  {						// We can never grant this
4894
    DBUG_PRINT("error",("No possible access"));
4895
    if (!no_errors)
4896
      my_error(ER_ACCESS_DENIED_ERROR, MYF(0),
4897 4898
               sctx->priv_user,
               sctx->priv_host,
4899 4900 4901
               (thd->password ?
                ER(ER_YES) :
                ER(ER_NO)));                    /* purecov: tested */
4902
    DBUG_RETURN(TRUE);				/* purecov: tested */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4903 4904 4905
  }

  if (db == any_db)
4906
    DBUG_RETURN(FALSE);				// Allow select on anything
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4907

4908
  if (db && (!thd->db || db_is_pattern || strcmp(db,thd->db)))
4909 4910
    db_access= acl_get(sctx->host, sctx->ip, sctx->priv_user, db,
                       db_is_pattern);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4911
  else
4912
    db_access= sctx->db_access;
4913
  DBUG_PRINT("info",("db_access: %lu", db_access));
monty@mysql.com's avatar
monty@mysql.com committed
4914
  /* Remove SHOW attribute and access rights we already have */
4915
  want_access &= ~(sctx->master_access | EXTRA_ACL);
4916 4917
  DBUG_PRINT("info",("db_access: %lu  want_access: %lu",
                     db_access, want_access));
4918
  db_access= ((*save_priv=(db_access | sctx->master_access)) & want_access);
4919 4920

  /* grant_option is set if there exists a single table or column grant */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4921
  if (db_access == want_access ||
4922
      (grant_option && !dont_check_global_grants &&
4923
       !(want_access & ~(db_access | TABLE_ACLS | PROC_ACLS))))
4924
    DBUG_RETURN(FALSE);				/* Ok */
4925 4926

  DBUG_PRINT("error",("Access denied"));
4927
  if (!no_errors)
4928
    my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
4929
             sctx->priv_user, sctx->priv_host,
4930 4931 4932
             (db ? db : (thd->db ?
                         thd->db :
                         "unknown")));          /* purecov: tested */
4933
  DBUG_RETURN(TRUE);				/* purecov: tested */
monty@mysql.com's avatar
monty@mysql.com committed
4934
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4935 4936 4937
}


4938 4939 4940 4941 4942 4943 4944 4945 4946
/*
  check for global access and give descriptive error message if it fails

  SYNOPSIS
    check_global_access()
    thd			Thread handler
    want_access		Use should have any of these global rights

  WARNING
4947
    One gets access right if one has ANY of the rights in want_access
4948 4949 4950 4951 4952 4953 4954 4955
    This is useful as one in most cases only need one global right,
    but in some case we want to check if the user has SUPER or
    REPL_CLIENT_ACL rights.

  RETURN
    0	ok
    1	Access denied.  In this case an error is sent to the client
*/
4956 4957

bool check_global_access(THD *thd, ulong want_access)
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
4958
{
monty@mysql.com's avatar
monty@mysql.com committed
4959 4960 4961
#ifdef NO_EMBEDDED_ACCESS_CHECKS
  return 0;
#else
4962
  char command[128];
4963
  if ((thd->security_ctx->master_access & want_access))
4964 4965
    return 0;
  get_privilege_desc(command, sizeof(command), want_access);
4966
  my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), command);
4967
  return 1;
monty@mysql.com's avatar
monty@mysql.com committed
4968
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
4969 4970 4971
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
4972
/*
4973 4974
  Check the privilege for all used tables.  Table privileges are cached
  in the table list for GRANT checking
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4975 4976
*/

4977
bool
4978
check_table_access(THD *thd, ulong want_access,TABLE_LIST *tables,
4979
		   bool no_errors)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4980
{
4981 4982
  uint found=0;
  ulong found_access=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4983
  TABLE_LIST *org_tables=tables;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4984
  for (; tables; tables= tables->next_global)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4985
  {
4986 4987 4988 4989 4990
    if (tables->schema_table && 
        (want_access & ~(SELECT_ACL | EXTRA_ACL)))
    {
      if (!no_errors)
        my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
4991
                 thd->security_ctx->priv_user, thd->security_ctx->priv_host,
4992 4993 4994
                 information_schema_name.str);
      return TRUE;
    }
4995
    if (tables->derived || tables->schema_table || tables->belong_to_view ||
4996
        (tables->table && (int)tables->table->s->tmp_table) ||
4997 4998
        my_tz_check_n_skip_implicit_tables(&tables,
                                           thd->lex->time_zone_tables_used))
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
4999
      continue;
5000 5001
    if ((thd->security_ctx->master_access & want_access) ==
        (want_access & ~EXTRA_ACL) &&
5002
	thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5003
      tables->grant.privilege= want_access;
5004
    else if (tables->db && tables->db == thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5005 5006 5007 5008 5009
    {
      if (found && !grant_option)		// db already checked
	tables->grant.privilege=found_access;
      else
      {
5010
	if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
5011
			 0, no_errors, test(tables->schema_table)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5012 5013
	  return TRUE;				// Access denied
	found_access=tables->grant.privilege;
5014
	found=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5015 5016
      }
    }
5017
    else if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
5018
			  0, no_errors, test(tables->schema_table)))
5019
      return TRUE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5020 5021
  }
  if (grant_option)
5022
    return check_grant(thd,want_access & ~EXTRA_ACL,org_tables,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5023
		       test(want_access & EXTRA_ACL), UINT_MAX, no_errors);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5024 5025 5026
  return FALSE;
}

5027

5028
bool
5029 5030
check_routine_access(THD *thd, ulong want_access,char *db, char *name,
		     bool is_proc, bool no_errors)
5031 5032 5033 5034 5035
{
  TABLE_LIST tables[1];
  
  bzero((char *)tables, sizeof(TABLE_LIST));
  tables->db= db;
5036
  tables->table_name= tables->alias= name;
5037
  
5038 5039
  if ((thd->security_ctx->master_access & want_access) == want_access &&
      !thd->db)
5040 5041
    tables->grant.privilege= want_access;
  else if (check_access(thd,want_access,db,&tables->grant.privilege,
5042
			0, no_errors, test(tables->schema_table)))
5043 5044
    return TRUE;
  
5045
#ifndef NO_EMBEDDED_ACCESS_CHECKS
5046
  if (grant_option)
5047
    return check_grant_routine(thd, want_access, tables, is_proc, no_errors);
5048
#endif
5049 5050 5051 5052

  return FALSE;
}

5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067

/*
  Check if the routine has any of the routine privileges

  SYNOPSIS
    check_some_routine_access()
    thd		 Thread handler
    db           Database name
    name         Routine name

  RETURN
    0            ok
    1            error
*/

5068 5069
bool check_some_routine_access(THD *thd, const char *db, const char *name,
                               bool is_proc)
5070 5071
{
  ulong save_priv;
5072
  if (thd->security_ctx->master_access & SHOW_PROC_ACLS)
5073
    return FALSE;
5074 5075 5076 5077 5078
  /*
    There are no routines in information_schema db. So we can safely
    pass zero to last paramter of check_access function
  */
  if (!check_access(thd, SHOW_PROC_ACLS, db, &save_priv, 0, 1, 0) ||
5079 5080
      (save_priv & SHOW_PROC_ACLS))
    return FALSE;
5081
  return check_routine_level_acl(thd, db, name, is_proc);
5082 5083 5084
}


5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109
/*
  Check if the given table has any of the asked privileges

  SYNOPSIS
    check_some_access()
    thd		 Thread handler
    want_access	 Bitmap of possible privileges to check for

  RETURN
    0  ok
    1  error
*/


bool check_some_access(THD *thd, ulong want_access, TABLE_LIST *table)
{
  ulong access;
  DBUG_ENTER("check_some_access");

  /* This loop will work as long as we have less than 32 privileges */
  for (access= 1; access < want_access ; access<<= 1)
  {
    if (access & want_access)
    {
      if (!check_access(thd, access, table->db,
5110 5111
                        &table->grant.privilege, 0, 1,
                        test(table->schema_table)) &&
5112 5113 5114 5115 5116 5117 5118 5119 5120
          !grant_option || !check_grant(thd, access, table, 0, 1, 1))
        DBUG_RETURN(0);
    }
  }
  DBUG_PRINT("exit",("no matching access rights"));
  DBUG_RETURN(1);
}


5121 5122
bool check_merge_table_access(THD *thd, char *db,
			      TABLE_LIST *table_list)
5123 5124 5125 5126
{
  int error=0;
  if (table_list)
  {
5127
    /* Check that all tables use the current database */
5128
    TABLE_LIST *tmp;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5129
    for (tmp= table_list; tmp; tmp= tmp->next_local)
5130 5131 5132 5133
    {
      if (!tmp->db || !tmp->db[0])
	tmp->db=db;
    }
5134
    error=check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
hf@deer.(none)'s avatar
hf@deer.(none) committed
5135
			     table_list,0);
5136 5137 5138 5139
  }
  return error;
}

hf@deer.(none)'s avatar
hf@deer.(none) committed
5140 5141 5142

static bool check_db_used(THD *thd,TABLE_LIST *tables)
{
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5143
  for (; tables; tables= tables->next_global)
hf@deer.(none)'s avatar
hf@deer.(none) committed
5144 5145 5146 5147 5148
  {
    if (!tables->db)
    {
      if (!(tables->db=thd->db))
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5149 5150
	my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR),
                   MYF(0));                     /* purecov: tested */
hf@deer.(none)'s avatar
hf@deer.(none) committed
5151 5152 5153 5154 5155 5156
	return TRUE;				/* purecov: tested */
      }
    }
  }
  return FALSE;
}
5157

5158

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5159 5160 5161 5162 5163 5164 5165 5166 5167 5168
/****************************************************************************
	Check stack size; Send error if there isn't enough stack to continue
****************************************************************************/

#if STACK_DIRECTION < 0
#define used_stack(A,B) (long) (A - B)
#else
#define used_stack(A,B) (long) (B - A)
#endif

monty@mysql.com's avatar
monty@mysql.com committed
5169 5170 5171 5172
#ifndef DBUG_OFF
long max_stack_used;
#endif

5173
#ifndef EMBEDDED_LIBRARY
5174 5175 5176 5177 5178 5179 5180 5181
/*
  Note: The 'buf' parameter is necessary, even if it is unused here.
  - fix_fields functions has a "dummy" buffer large enough for the
    corresponding exec. (Thus we only have to check in fix_fields.)
  - Passing to check_stack_overrun() prevents the compiler from removing it.
 */
bool check_stack_overrun(THD *thd, long margin,
			 char *buf __attribute__((unused)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5182 5183 5184
{
  long stack_used;
  if ((stack_used=used_stack(thd->thread_stack,(char*) &stack_used)) >=
monty@mysql.com's avatar
monty@mysql.com committed
5185
      (long) (thread_stack - margin))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5186
  {
5187 5188 5189
    sprintf(errbuff[0],ER(ER_STACK_OVERRUN_NEED_MORE),
            stack_used,thread_stack,margin);
    my_message(ER_STACK_OVERRUN_NEED_MORE,errbuff[0],MYF(0));
5190
    thd->fatal_error();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5191 5192
    return 1;
  }
monty@mysql.com's avatar
monty@mysql.com committed
5193 5194 5195
#ifndef DBUG_OFF
  max_stack_used= max(max_stack_used, stack_used);
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5196 5197
  return 0;
}
5198
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5199 5200 5201 5202

#define MY_YACC_INIT 1000			// Start with big alloc
#define MY_YACC_MAX  32000			// Because of 'short'

5203
bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, ulong *yystacksize)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5204 5205
{
  LEX	*lex=current_lex;
5206
  ulong old_info=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232
  if ((uint) *yystacksize >= MY_YACC_MAX)
    return 1;
  if (!lex->yacc_yyvs)
    old_info= *yystacksize;
  *yystacksize= set_zone((*yystacksize)*2,MY_YACC_INIT,MY_YACC_MAX);
  if (!(lex->yacc_yyvs= (char*)
	my_realloc((gptr) lex->yacc_yyvs,
		   *yystacksize*sizeof(**yyvs),
		   MYF(MY_ALLOW_ZERO_PTR | MY_FREE_ON_ERROR))) ||
      !(lex->yacc_yyss= (char*)
	my_realloc((gptr) lex->yacc_yyss,
		   *yystacksize*sizeof(**yyss),
		   MYF(MY_ALLOW_ZERO_PTR | MY_FREE_ON_ERROR))))
    return 1;
  if (old_info)
  {						// Copy old info from stack
    memcpy(lex->yacc_yyss, (gptr) *yyss, old_info*sizeof(**yyss));
    memcpy(lex->yacc_yyvs, (gptr) *yyvs, old_info*sizeof(**yyvs));
  }
  *yyss=(short*) lex->yacc_yyss;
  *yyvs=(YYSTYPE*) lex->yacc_yyvs;
  return 0;
}


/****************************************************************************
5233
  Initialize global thd variables needed for query
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5234 5235
****************************************************************************/

5236
void
5237
mysql_init_query(THD *thd, uchar *buf, uint length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5238 5239
{
  DBUG_ENTER("mysql_init_query");
5240
  lex_start(thd, buf, length);
5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261
  mysql_reset_thd_for_next_command(thd);
  DBUG_VOID_RETURN;
}


/*
 Reset THD part responsible for command processing state.

 DESCRIPTION
   This needs to be called before execution of every statement
   (prepared or conventional).

 TODO
   Make it a method of THD and align its name with the rest of
   reset/end/start/init methods.
   Call it after we use THD for queries, not before.
*/

void mysql_reset_thd_for_next_command(THD *thd)
{
  DBUG_ENTER("mysql_reset_thd_for_next_command");
5262
  thd->free_list= 0;
5263
  thd->select_number= 1;
5264
  thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
5265
  thd->is_fatal_error= thd->time_zone_used= 0;
monty@mysql.com's avatar
monty@mysql.com committed
5266
  thd->server_status&= ~ (SERVER_MORE_RESULTS_EXISTS | 
monty@mysql.com's avatar
monty@mysql.com committed
5267 5268
                          SERVER_QUERY_NO_INDEX_USED |
                          SERVER_QUERY_NO_GOOD_INDEX_USED);
5269
  DBUG_ASSERT(thd->security_ctx== &thd->main_security_ctx);
5270
  thd->tmp_table_used= 0;
5271 5272
  if (!thd->in_sub_stmt)
  {
5273
    if (opt_bin_log)
5274
    {
5275
      reset_dynamic(&thd->user_var_events);
5276 5277
      thd->user_var_events_alloc= thd->mem_root;
    }
5278
    thd->clear_error();
5279 5280 5281 5282
    thd->total_warn_count=0;			// Warnings for this query
    thd->rand_used= 0;
    thd->sent_row_count= thd->examined_row_count= 0;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5283 5284 5285
  DBUG_VOID_RETURN;
}

5286

5287 5288 5289
void
mysql_init_select(LEX *lex)
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5290
  SELECT_LEX *select_lex= lex->current_select;
5291
  select_lex->init_select();
5292
  lex->wild= 0;
5293 5294
  if (select_lex == &lex->select_lex)
  {
5295
    DBUG_ASSERT(lex->result == 0);
5296 5297
    lex->exchange= 0;
  }
5298 5299
}

5300

5301
bool
5302
mysql_new_select(LEX *lex, bool move_down)
5303
{
5304
  SELECT_LEX *select_lex;
5305
  THD *thd= lex->thd;
5306 5307
  DBUG_ENTER("mysql_new_select");

5308
  if (!(select_lex= new (thd->mem_root) SELECT_LEX()))
5309
    DBUG_RETURN(1);
5310
  select_lex->select_number= ++thd->select_number;
5311
  select_lex->parent_lex= lex; /* Used in init_query. */
5312 5313
  select_lex->init_query();
  select_lex->init_select();
5314 5315 5316 5317 5318
  /*
    Don't evaluate this subquery during statement prepare even if
    it's a constant one. The flag is switched off in the end of
    mysql_stmt_prepare.
  */
konstantin@mysql.com's avatar
konstantin@mysql.com committed
5319
  if (thd->stmt_arena->is_stmt_prepare())
5320
    select_lex->uncacheable|= UNCACHEABLE_PREPARE;
5321 5322
  if (move_down)
  {
5323
    SELECT_LEX_UNIT *unit;
5324
    lex->subqueries= TRUE;
5325
    /* first select_lex of subselect or derived table */
5326
    if (!(unit= new (thd->mem_root) SELECT_LEX_UNIT()))
5327
      DBUG_RETURN(1);
5328

5329 5330
    unit->init_query();
    unit->init_select();
5331
    unit->thd= thd;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5332
    unit->include_down(lex->current_select);
5333 5334
    unit->link_next= 0;
    unit->link_prev= 0;
5335
    unit->return_to= lex->current_select;
5336
    select_lex->include_down(unit);
5337 5338 5339 5340 5341
    /*
      By default we assume that it is usual subselect and we have outer name
      resolution context, if no we will assign it to 0 later
    */
    select_lex->context.outer_context= &select_lex->outer_select()->context;
5342 5343
  }
  else
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5344
  {
5345
    Name_resolution_context *outer_context;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5346 5347
    if (lex->current_select->order_list.first && !lex->current_select->braces)
    {
5348
      my_error(ER_WRONG_USAGE, MYF(0), "UNION", "ORDER BY");
5349
      DBUG_RETURN(1);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5350
    }
5351
    select_lex->include_neighbour(lex->current_select);
5352 5353 5354 5355 5356 5357
    /*
      we are not sure that we have one level of SELECTs above, so we take
      outer_context address from first select of unit
    */
    outer_context=
      select_lex->master_unit()->first_select()->context.outer_context;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5358 5359 5360 5361 5362 5363 5364 5365
    SELECT_LEX_UNIT *unit= select_lex->master_unit();
    SELECT_LEX *fake= unit->fake_select_lex;
    if (!fake)
    {
      /*
	as far as we included SELECT_LEX for UNION unit should have
	fake SELECT_LEX for UNION processing
      */
5366
      if (!(fake= unit->fake_select_lex= new (thd->mem_root) SELECT_LEX()))
5367
        DBUG_RETURN(1);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5368 5369 5370
      fake->include_standalone(unit,
			       (SELECT_LEX_NODE**)&unit->fake_select_lex);
      fake->select_number= INT_MAX;
5371
      fake->parent_lex= lex; /* Used in init_query. */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5372 5373
      fake->make_empty_select();
      fake->linkage= GLOBAL_OPTIONS_TYPE;
5374
      fake->select_limit= 0;
5375 5376 5377 5378 5379

      fake->context.outer_context= outer_context;
      /* allow item list resolving in fake select for ORDER BY */
      fake->context.resolve_in_select_list= TRUE;
      fake->context.select_lex= fake;
5380 5381 5382 5383 5384
      /*
        Remove the name resolution context of the fake select from the
        context stack.
       */
      lex->pop_context();
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5385
    }
5386
    select_lex->context.outer_context= outer_context;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5387
  }
peter@mysql.com's avatar
peter@mysql.com committed
5388

5389
  select_lex->master_unit()->global_parameters= select_lex;
5390
  select_lex->include_global((st_select_lex_node**)&lex->all_selects_list);
5391
  lex->current_select= select_lex;
5392 5393 5394 5395 5396
  /*
    in subquery is SELECT query and we allow resolution of names in SELECT
    list
  */
  select_lex->context.resolve_in_select_list= TRUE;
5397
  DBUG_RETURN(0);
5398
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5399

5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414
/*
  Create a select to return the same output as 'SELECT @@var_name'.

  SYNOPSIS
    create_select_for_variable()
    var_name		Variable name

  DESCRIPTION
    Used for SHOW COUNT(*) [ WARNINGS | ERROR]

    This will crash with a core dump if the variable doesn't exists
*/

void create_select_for_variable(const char *var_name)
{
5415
  THD *thd;
5416
  LEX *lex;
5417
  LEX_STRING tmp, null_lex_string;
5418 5419
  Item *var;
  char buff[MAX_SYS_VAR_LENGTH*2+4+8], *end;
5420
  DBUG_ENTER("create_select_for_variable");
5421 5422

  thd= current_thd;
pem@mysql.telia.com's avatar
pem@mysql.telia.com committed
5423
  lex= thd->lex;
5424 5425 5426 5427
  mysql_init_select(lex);
  lex->sql_command= SQLCOM_SELECT;
  tmp.str= (char*) var_name;
  tmp.length=strlen(var_name);
5428
  bzero((char*) &null_lex_string.str, sizeof(null_lex_string));
5429 5430 5431 5432
  /*
    We set the name of Item to @@session.var_name because that then is used
    as the column name in the output.
  */
monty@mysql.com's avatar
monty@mysql.com committed
5433 5434 5435 5436 5437 5438
  if ((var= get_system_var(thd, OPT_SESSION, tmp, null_lex_string)))
  {
    end= strxmov(buff, "@@session.", var_name, NullS);
    var->set_name(buff, end-buff, system_charset_info);
    add_item_to_list(thd, var);
  }
5439 5440 5441
  DBUG_VOID_RETURN;
}

5442

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5443 5444
void mysql_init_multi_delete(LEX *lex)
{
5445
  lex->sql_command=  SQLCOM_DELETE_MULTI;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5446
  mysql_init_select(lex);
5447 5448
  lex->select_lex.select_limit= 0;
  lex->unit.select_limit_cnt= HA_POS_ERROR;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5449
  lex->select_lex.table_list.save_and_clear(&lex->auxilliary_table_list);
5450
  lex->lock_option= using_update_log ? TL_READ_NO_INSERT : TL_READ;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5451 5452
  lex->query_tables= 0;
  lex->query_tables_last= &lex->query_tables;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5453
}
5454

5455

5456 5457 5458 5459
/*
  When you modify mysql_parse(), you may need to mofify
  mysql_test_parse_for_slave() in this same file.
*/
5460

5461
void mysql_parse(THD *thd, char *inBuf, uint length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5462 5463
{
  DBUG_ENTER("mysql_parse");
5464
  mysql_init_query(thd, (uchar*) inBuf, length);
5465
  if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5466
  {
5467
    LEX *lex= thd->lex;
5468
    
5469 5470
    sp_cache_flush_obsolete(&thd->sp_proc_cache);
    sp_cache_flush_obsolete(&thd->sp_func_cache);
5471
    
5472
    if (!yyparse((void *)thd) && ! thd->is_fatal_error)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5473
    {
hf@deer.(none)'s avatar
hf@deer.(none) committed
5474
#ifndef NO_EMBEDDED_ACCESS_CHECKS
5475
      if (mqh_used && thd->user_connect &&
5476
	  check_mqh(thd, lex->sql_command))
5477 5478 5479 5480
      {
	thd->net.error = 0;
      }
      else
hf@deer.(none)'s avatar
hf@deer.(none) committed
5481
#endif
5482
      {
5483
	if (thd->net.report_error)
5484 5485
	{
	  if (thd->lex->sphead)
5486 5487 5488 5489
	  {
	    delete thd->lex->sphead;
	    thd->lex->sphead= NULL;
	  }
5490
	}
5491 5492
	else
	{
5493 5494 5495 5496 5497 5498 5499 5500 5501 5502
          /*
            Binlog logs a string starting from thd->query and having length
            thd->query_length; so we set thd->query_length correctly (to not
            log several statements in one event, when we executed only first).
            We set it to not see the ';' (otherwise it would get into binlog
            and Query_log_event::print() would give ';;' output).
            This also helps display only the current query in SHOW
            PROCESSLIST.
            Note that we don't need LOCK_thread_count to modify query_length.
          */
serg@serg.mylan's avatar
serg@serg.mylan committed
5503 5504
          if (lex->found_semicolon &&
              (thd->query_length= (ulong)(lex->found_semicolon - thd->query)))
5505 5506
            thd->query_length--;
          /* Actually execute the query */
5507
	  mysql_execute_command(thd);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
5508
	  query_cache_end_of_result(thd);
5509
	}
5510
      }
5511
      lex->unit.cleanup();
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5512 5513
    }
    else
5514 5515
    {
      DBUG_PRINT("info",("Command aborted. Fatal_error: %d",
5516
			 thd->is_fatal_error));
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5517
      query_cache_abort(&thd->net);
5518
      lex->unit.cleanup();
5519
      if (thd->lex->sphead)
5520
      {
monty@mysql.com's avatar
monty@mysql.com committed
5521
	/* Clean up after failed stored procedure/function */
5522 5523 5524
	delete thd->lex->sphead;
	thd->lex->sphead= NULL;
      }
5525
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5526
    thd->proc_info="freeing items";
5527
    thd->end_statement();
5528
    thd->cleanup_after_query();
5529
    DBUG_ASSERT(thd->change_list.is_empty());
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5530
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5531 5532 5533 5534
  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
5535
#ifdef HAVE_REPLICATION
5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546
/*
  Usable by the replication SQL thread only: just parse a query to know if it
  can be ignored because of replicate-*-table rules.

  RETURN VALUES
    0	cannot be ignored
    1	can be ignored
*/

bool mysql_test_parse_for_slave(THD *thd, char *inBuf, uint length)
{
5547
  LEX *lex= thd->lex;
5548
  bool error= 0;
monty@mysql.com's avatar
monty@mysql.com committed
5549
  DBUG_ENTER("mysql_test_parse_for_slave");
5550

5551
  mysql_init_query(thd, (uchar*) inBuf, length);
monty@mysql.com's avatar
monty@mysql.com committed
5552
  if (!yyparse((void*) thd) && ! thd->is_fatal_error &&
5553
      all_tables_not_ok(thd,(TABLE_LIST*) lex->select_lex.table_list.first))
monty@mysql.com's avatar
monty@mysql.com committed
5554
    error= 1;                  /* Ignore question */
5555
  thd->end_statement();
5556
  thd->cleanup_after_query();
monty@mysql.com's avatar
monty@mysql.com committed
5557
  DBUG_RETURN(error);
5558
}
monty@mysql.com's avatar
monty@mysql.com committed
5559
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5560

5561

monty@mysql.com's avatar
monty@mysql.com committed
5562

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5563 5564 5565 5566 5567
/*****************************************************************************
** Store field definition for create
** Return 0 if ok
******************************************************************************/

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5568
bool add_field_to_list(THD *thd, char *field_name, enum_field_types type,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5569
		       char *length, char *decimals,
5570
		       uint type_modifier,
5571 5572
		       Item *default_value, Item *on_update_value,
                       LEX_STRING *comment,
5573 5574
		       char *change,
                       List<String> *interval_list, CHARSET_INFO *cs,
5575
		       uint uint_geom_type)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5576 5577
{
  register create_field *new_field;
5578
  LEX  *lex= thd->lex;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5579 5580 5581 5582
  DBUG_ENTER("add_field_to_list");

  if (strlen(field_name) > NAME_LEN)
  {
5583
    my_error(ER_TOO_LONG_IDENT, MYF(0), field_name); /* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5584 5585 5586 5587 5588
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  if (type_modifier & PRI_KEY_FLAG)
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
5589
    lex->key_list.push_back(new Key(Key::PRIMARY, NullS, HA_KEY_ALG_UNDEF,
5590
				    0, lex->col_list));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5591 5592 5593 5594 5595
    lex->col_list.empty();
  }
  if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG))
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
5596
    lex->key_list.push_back(new Key(Key::UNIQUE, NullS, HA_KEY_ALG_UNDEF, 0,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5597 5598 5599 5600
				    lex->col_list));
    lex->col_list.empty();
  }

5601
  if (default_value)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5602
  {
5603
    /* 
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5604 5605
      Default value should be literal => basic constants =>
      no need fix_fields()
5606 5607 5608
      
      We allow only one function as part of default value - 
      NOW() as default for TIMESTAMP type.
5609
    */
5610 5611 5612
    if (default_value->type() == Item::FUNC_ITEM && 
        !(((Item_func*)default_value)->functype() == Item_func::NOW_FUNC &&
         type == FIELD_TYPE_TIMESTAMP))
5613
    {
5614
      my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
5615 5616 5617
      DBUG_RETURN(1);
    }
    else if (default_value->type() == Item::NULL_ITEM)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5618
    {
5619
      default_value= 0;
5620 5621 5622
      if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) ==
	  NOT_NULL_FLAG)
      {
5623
	my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
5624 5625 5626 5627 5628
	DBUG_RETURN(1);
      }
    }
    else if (type_modifier & AUTO_INCREMENT_FLAG)
    {
5629
      my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5630 5631 5632
      DBUG_RETURN(1);
    }
  }
5633 5634 5635

  if (on_update_value && type != FIELD_TYPE_TIMESTAMP)
  {
5636
    my_error(ER_INVALID_ON_UPDATE, MYF(0), field_name);
5637 5638
    DBUG_RETURN(1);
  }
5639

5640 5641 5642 5643 5644 5645
  if (type == FIELD_TYPE_TIMESTAMP && length)
  {
    /* Display widths are no longer supported for TIMSTAMP as of MySQL 4.1.
       In other words, for declarations such as TIMESTAMP(2), TIMESTAMP(4),
       and so on, the display width is ignored.
    */
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
5646 5647 5648
    char buf[32];
    my_snprintf(buf, sizeof(buf),
                "TIMESTAMP(%s)", length, system_charset_info);
5649 5650 5651
    push_warning_printf(thd,MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_WARN_DEPRECATED_SYNTAX,
                        ER(ER_WARN_DEPRECATED_SYNTAX),
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
5652
                        buf, "TIMESTAMP");
5653 5654
  }

5655 5656 5657
  if (!(new_field= new_create_field(thd, field_name, type, length, decimals,
		type_modifier, default_value, on_update_value,
		comment, change, interval_list, cs, uint_geom_type)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5658
    DBUG_RETURN(1);
5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685

  lex->create_list.push_back(new_field);
  lex->last_field=new_field;
  DBUG_RETURN(0);
}

/*****************************************************************************
** Create field definition for create
** Return 0 on failure, otherwise return create_field instance
******************************************************************************/
  
create_field *
new_create_field(THD *thd, char *field_name, enum_field_types type,
		 char *length, char *decimals,
		 uint type_modifier, 
		 Item *default_value, Item *on_update_value,
		 LEX_STRING *comment,
		 char *change, List<String> *interval_list, CHARSET_INFO *cs,
		 uint uint_geom_type)
{
  register create_field *new_field;
  uint sign_len, allowed_type_modifier=0;
  ulong max_field_charlength= MAX_FIELD_CHARLENGTH;
  DBUG_ENTER("new_create_field");
  
  if (!(new_field=new create_field()))
    DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5686 5687
  new_field->field=0;
  new_field->field_name=field_name;
5688
  new_field->def= default_value;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5689 5690 5691
  new_field->flags= type_modifier;
  new_field->unireg_check= (type_modifier & AUTO_INCREMENT_FLAG ?
			    Field::NEXT_NUMBER : Field::NONE);
5692 5693 5694 5695 5696 5697 5698 5699
  new_field->decimals= decimals ? (uint)atoi(decimals) : 0;
  if (new_field->decimals >= NOT_FIXED_DEC)
  {
    my_error(ER_TOO_BIG_SCALE, MYF(0), new_field->decimals, field_name,
             NOT_FIXED_DEC-1);
    DBUG_RETURN(NULL);
  }

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5700 5701 5702 5703
  new_field->sql_type=type;
  new_field->length=0;
  new_field->change=change;
  new_field->interval=0;
5704
  new_field->pack_length= new_field->key_length= 0;
5705
  new_field->charset=cs;
5706
  new_field->geom_type= (Field::geometry_type) uint_geom_type;
5707

5708
  new_field->comment=*comment;
5709 5710 5711
  /*
    Set flag if this field doesn't have a default value
  */
5712
  if (!default_value && !(type_modifier & AUTO_INCREMENT_FLAG) &&
5713
      (type_modifier & NOT_NULL_FLAG) && type != FIELD_TYPE_TIMESTAMP)
5714 5715
    new_field->flags|= NO_DEFAULT_VALUE_FLAG;

5716 5717
  if (length && !(new_field->length= (uint) atoi(length)))
    length=0; /* purecov: inspected */
5718
  sign_len=type_modifier & UNSIGNED_FLAG ? 0 : 1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5719 5720 5721

  switch (type) {
  case FIELD_TYPE_TINY:
5722
    if (!length) new_field->length=MAX_TINYINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5723 5724 5725
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_SHORT:
5726
    if (!length) new_field->length=MAX_SMALLINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5727 5728 5729
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_INT24:
5730
    if (!length) new_field->length=MAX_MEDIUMINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5731 5732 5733
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONG:
5734
    if (!length) new_field->length=MAX_INT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5735 5736 5737
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONGLONG:
5738
    if (!length) new_field->length=MAX_BIGINT_WIDTH;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5739 5740 5741 5742
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_NULL:
    break;
5743
  case FIELD_TYPE_NEWDECIMAL:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5744
    if (!length)
5745 5746
      new_field->length= 10;
    if (new_field->length > DECIMAL_MAX_PRECISION)
monty@mysql.com's avatar
monty@mysql.com committed
5747
    {
5748 5749 5750
      my_error(ER_TOO_BIG_PRECISION, MYF(0), new_field->length, field_name,
               DECIMAL_MAX_PRECISION);
      DBUG_RETURN(NULL);
monty@mysql.com's avatar
monty@mysql.com committed
5751
    }
5752
    if (new_field->length < new_field->decimals)
5753
    {
5754 5755
      my_error(ER_SCALE_BIGGER_THAN_PRECISION, MYF(0), field_name);
      DBUG_RETURN(NULL);
5756
    }
5757 5758 5759 5760 5761 5762
    new_field->length=
      my_decimal_precision_to_length(new_field->length, new_field->decimals,
                                     type_modifier & UNSIGNED_FLAG);
    new_field->pack_length=
      my_decimal_get_binary_size(new_field->length, new_field->decimals);
    break;
5763 5764 5765 5766 5767 5768 5769 5770 5771
  case MYSQL_TYPE_VARCHAR:
    /*
      Long VARCHAR's are automaticly converted to blobs in mysql_prepare_table
      if they don't have a default value
    */
    max_field_charlength= MAX_FIELD_VARCHARLENGTH;
    break;
  case MYSQL_TYPE_STRING:
    break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5772 5773 5774 5775
  case FIELD_TYPE_BLOB:
  case FIELD_TYPE_TINY_BLOB:
  case FIELD_TYPE_LONG_BLOB:
  case FIELD_TYPE_MEDIUM_BLOB:
5776
  case FIELD_TYPE_GEOMETRY:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5777 5778 5779 5780 5781 5782
    if (default_value)				// Allow empty as default value
    {
      String str,*res;
      res=default_value->val_str(&str);
      if (res->length())
      {
5783 5784
	my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0),
                 field_name); /* purecov: inspected */
5785
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803
      }
      new_field->def=0;
    }
    new_field->flags|=BLOB_FLAG;
    break;
  case FIELD_TYPE_YEAR:
    if (!length || new_field->length != 2)
      new_field->length=4;			// Default length
    new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
    break;
  case FIELD_TYPE_FLOAT:
    /* change FLOAT(precision) to FLOAT or DOUBLE */
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    if (length && !decimals)
    {
      uint tmp_length=new_field->length;
      if (tmp_length > PRECISION_FOR_DOUBLE)
      {
5804
	my_error(ER_WRONG_FIELD_SPEC, MYF(0), field_name);
5805
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816
      }
      else if (tmp_length > PRECISION_FOR_FLOAT)
      {
	new_field->sql_type=FIELD_TYPE_DOUBLE;
	new_field->length=DBL_DIG+7;			// -[digits].E+###
      }
      else
	new_field->length=FLT_DIG+6;			// -[digits].E+##
      new_field->decimals= NOT_FIXED_DEC;
      break;
    }
5817
    if (!length && !decimals)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5818 5819 5820 5821
    {
      new_field->length =  FLT_DIG+6;
      new_field->decimals= NOT_FIXED_DEC;
    }
5822 5823 5824
    if (new_field->length < new_field->decimals &&
        new_field->decimals != NOT_FIXED_DEC)
    {
5825
      my_error(ER_M_BIGGER_THAN_D, MYF(0), field_name);
5826 5827
      DBUG_RETURN(NULL);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5828 5829 5830
    break;
  case FIELD_TYPE_DOUBLE:
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
5831
    if (!length && !decimals)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5832 5833 5834 5835
    {
      new_field->length = DBL_DIG+7;
      new_field->decimals=NOT_FIXED_DEC;
    }
5836 5837 5838
    if (new_field->length < new_field->decimals &&
        new_field->decimals != NOT_FIXED_DEC)
    {
5839
      my_error(ER_M_BIGGER_THAN_D, MYF(0), field_name);
5840 5841
      DBUG_RETURN(NULL);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5842 5843 5844 5845
    break;
  case FIELD_TYPE_TIMESTAMP:
    if (!length)
      new_field->length= 14;			// Full date YYYYMMDDHHMMSS
5846
    else if (new_field->length != 19)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5847
    {
5848 5849 5850 5851
      /*
        We support only even TIMESTAMP lengths less or equal than 14
        and 19 as length of 4.1 compatible representation.
      */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5852 5853 5854
      new_field->length=((new_field->length+1)/2)*2; /* purecov: inspected */
      new_field->length= min(new_field->length,14); /* purecov: inspected */
    }
5855
    new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874 5875
    if (default_value)
    {
      /* Grammar allows only NOW() value for ON UPDATE clause */
      if (default_value->type() == Item::FUNC_ITEM && 
          ((Item_func*)default_value)->functype() == Item_func::NOW_FUNC)
      {
        new_field->unireg_check= (on_update_value?Field::TIMESTAMP_DNUN_FIELD:
                                                  Field::TIMESTAMP_DN_FIELD);
        /*
          We don't need default value any longer moreover it is dangerous.
          Everything handled by unireg_check further.
        */
        new_field->def= 0;
      }
      else
        new_field->unireg_check= (on_update_value?Field::TIMESTAMP_UN_FIELD:
                                                  Field::NONE);
    }
    else
    {
5876 5877 5878 5879 5880 5881 5882 5883
      /*
        If we have default TIMESTAMP NOT NULL column without explicit DEFAULT
        or ON UPDATE values then for the sake of compatiblity we should treat
        this column as having DEFAULT NOW() ON UPDATE NOW() (when we don't
        have another TIMESTAMP column with auto-set option before this one)
        or DEFAULT 0 (in other cases).
        So here we are setting TIMESTAMP_OLD_FIELD only temporary, and will
        replace this value by TIMESTAMP_DNUN_FIELD or NONE later when
5884
        information about all TIMESTAMP fields in table will be availiable.
5885 5886 5887

        If we have TIMESTAMP NULL column without explicit DEFAULT value
        we treat it as having DEFAULT NULL attribute.
5888
      */
monty@mysql.com's avatar
monty@mysql.com committed
5889 5890 5891 5892 5893
      new_field->unireg_check= (on_update_value ?
                                Field::TIMESTAMP_UN_FIELD :
                                (new_field->flags & NOT_NULL_FLAG ?
                                 Field::TIMESTAMP_OLD_FIELD:
                                 Field::NONE));
5894
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910
    break;
  case FIELD_TYPE_DATE:				// Old date type
    if (protocol_version != PROTOCOL_VERSION-1)
      new_field->sql_type=FIELD_TYPE_NEWDATE;
    /* fall trough */
  case FIELD_TYPE_NEWDATE:
    new_field->length=10;
    break;
  case FIELD_TYPE_TIME:
    new_field->length=10;
    break;
  case FIELD_TYPE_DATETIME:
    new_field->length=19;
    break;
  case FIELD_TYPE_SET:
    {
5911
      if (interval_list->elements > sizeof(longlong)*8)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5912
      {
5913
	my_error(ER_TOO_BIG_SET, MYF(0), field_name); /* purecov: inspected */
5914
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5915
      }
5916
      new_field->pack_length= get_set_pack_length(interval_list->elements);
5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927

      List_iterator<String> it(*interval_list);
      String *tmp;
      while ((tmp= it++))
        new_field->interval_list.push_back(tmp);
      /*
        Set fake length to 1 to pass the below conditions.
        Real length will be set in mysql_prepare_table()
        when we know the character set of the column
      */
      new_field->length= 1;
5928
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5929 5930 5931
    }
  case FIELD_TYPE_ENUM:
    {
5932
      // Should be safe
5933
      new_field->pack_length= get_enum_pack_length(interval_list->elements);
5934

5935 5936 5937 5938 5939
      List_iterator<String> it(*interval_list);
      String *tmp;
      while ((tmp= it++))
        new_field->interval_list.push_back(tmp);
      new_field->length= 1; // See comment for FIELD_TYPE_SET above.
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5940
      break;
5941
   }
5942 5943
  case MYSQL_TYPE_VAR_STRING:
    DBUG_ASSERT(0);                             // Impossible
5944
    break;
ram@gw.mysql.r18.ru's avatar
ram@gw.mysql.r18.ru committed
5945 5946 5947 5948 5949 5950
  case MYSQL_TYPE_BIT:
    {
      if (!length)
        new_field->length= 1;
      if (new_field->length > MAX_BIT_FIELD_LENGTH)
      {
5951
        my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), field_name,
ram@gw.mysql.r18.ru's avatar
ram@gw.mysql.r18.ru committed
5952
                 MAX_BIT_FIELD_LENGTH);
5953
        DBUG_RETURN(NULL);
ram@gw.mysql.r18.ru's avatar
ram@gw.mysql.r18.ru committed
5954 5955 5956 5957
      }
      new_field->pack_length= (new_field->length + 7) / 8;
      break;
    }
5958 5959
  case FIELD_TYPE_DECIMAL:
    DBUG_ASSERT(0); /* Was obsolete */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5960 5961
  }

5962 5963 5964 5965 5966 5967 5968
  if (!(new_field->flags & BLOB_FLAG) &&
      ((new_field->length > max_field_charlength && type != FIELD_TYPE_SET && 
        type != FIELD_TYPE_ENUM &&
        (type != MYSQL_TYPE_VARCHAR || default_value)) ||
       (!new_field->length &&
        type != MYSQL_TYPE_STRING &&
        type != MYSQL_TYPE_VARCHAR && type != FIELD_TYPE_GEOMETRY)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5969
  {
5970 5971 5972 5973
    my_error((type == MYSQL_TYPE_VAR_STRING || type == MYSQL_TYPE_VARCHAR ||
              type == MYSQL_TYPE_STRING) ?  ER_TOO_BIG_FIELDLENGTH :
             ER_TOO_BIG_DISPLAYWIDTH,
             MYF(0),
5974
             field_name, max_field_charlength); /* purecov: inspected */
5975
    DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5976 5977 5978 5979
  }
  type_modifier&= AUTO_INCREMENT_FLAG;
  if ((~allowed_type_modifier) & type_modifier)
  {
5980
    my_error(ER_WRONG_FIELD_SPEC, MYF(0), field_name);
5981
    DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5982
  }
5983
  DBUG_RETURN(new_field);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5984 5985
}

5986

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5987 5988 5989 5990 5991 5992 5993 5994
/* Store position for column in ALTER TABLE .. ADD column */

void store_position_for_column(const char *name)
{
  current_lex->last_field->after=my_const_cast(char*) (name);
}

bool
5995
add_proc_to_list(THD* thd, Item *item)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5996 5997 5998 5999
{
  ORDER *order;
  Item	**item_ptr;

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6000
  if (!(order = (ORDER *) thd->alloc(sizeof(ORDER)+sizeof(Item*))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6001 6002 6003 6004 6005
    return 1;
  item_ptr = (Item**) (order+1);
  *item_ptr= item;
  order->item=item_ptr;
  order->free_me=0;
6006
  thd->lex->proc_list.link_in_list((byte*) order,(byte**) &order->next);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6007 6008 6009 6010 6011 6012 6013 6014
  return 0;
}


/* Fix escaping of _, % and \ in database and table names (for ODBC) */

static void remove_escape(char *name)
{
6015 6016
  if (!*name)					// For empty DB names
    return;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6017 6018
  char *to;
#ifdef USE_MB
6019
  char *strend=name+(uint) strlen(name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6020 6021 6022 6023 6024
#endif
  for (to=name; *name ; name++)
  {
#ifdef USE_MB
    int l;
6025 6026
    if (use_mb(system_charset_info) &&
        (l = my_ismbchar(system_charset_info, name, strend)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6027 6028 6029 6030 6031 6032 6033 6034
    {
	while (l--)
	    *to++ = *name++;
	name--;
	continue;
    }
#endif
    if (*name == '\\' && name[1])
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6035
      name++;					// Skip '\\'
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6036 6037 6038 6039 6040 6041 6042 6043 6044 6045
    *to++= *name;
  }
  *to=0;
}

/****************************************************************************
** save order by and tables in own lists
****************************************************************************/


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6046
bool add_to_list(THD *thd, SQL_LIST &list,Item *item,bool asc)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6047 6048 6049
{
  ORDER *order;
  DBUG_ENTER("add_to_list");
6050
  if (!(order = (ORDER *) thd->alloc(sizeof(ORDER))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6051
    DBUG_RETURN(1);
6052 6053
  order->item_ptr= item;
  order->item= &order->item_ptr;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6054 6055 6056
  order->asc = asc;
  order->free_me=0;
  order->used=0;
6057
  order->counter_used= 0;
6058
  list.link_in_list((byte*) order,(byte**) &order->next);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6059 6060 6061 6062
  DBUG_RETURN(0);
}


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081
/*
  Add a table to list of used tables

  SYNOPSIS
    add_table_to_list()
    table		Table to add
    alias		alias for table (or null if no alias)
    table_options	A set of the following bits:
			TL_OPTION_UPDATING	Table will be updated
			TL_OPTION_FORCE_INDEX	Force usage of index
    lock_type		How table should be locked
    use_index		List of indexed used in USE INDEX
    ignore_index	List of indexed used in IGNORE INDEX

    RETURN
      0		Error
      #		Pointer to TABLE_LIST element added to the total table list
*/

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6082 6083
TABLE_LIST *st_select_lex::add_table_to_list(THD *thd,
					     Table_ident *table,
6084
					     LEX_STRING *alias,
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6085 6086
					     ulong table_options,
					     thr_lock_type lock_type,
6087 6088
					     List<String> *use_index_arg,
					     List<String> *ignore_index_arg,
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
6089
                                             LEX_STRING *option)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6090 6091
{
  register TABLE_LIST *ptr;
6092
  TABLE_LIST *previous_table_ref; /* The table preceding the current one. */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6093
  char *alias_str;
6094
  LEX *lex= thd->lex;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6095
  DBUG_ENTER("add_table_to_list");
6096
  LINT_INIT(previous_table_ref);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6097 6098 6099 6100

  if (!table)
    DBUG_RETURN(0);				// End of memory
  alias_str= alias ? alias->str : table->table.str;
6101
  if (check_table_name(table->table.str,table->table.length) ||
6102
      table->db.str && check_db_name(table->db.str))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6103
  {
6104
    my_error(ER_WRONG_TABLE_NAME, MYF(0), table->table.str);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6105 6106 6107 6108
    DBUG_RETURN(0);
  }

  if (!alias)					/* Alias is case sensitive */
6109 6110 6111
  {
    if (table->sel)
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6112 6113
      my_message(ER_DERIVED_MUST_HAVE_ALIAS,
                 ER(ER_DERIVED_MUST_HAVE_ALIAS), MYF(0));
6114 6115
      DBUG_RETURN(0);
    }
6116
    if (!(alias_str=thd->memdup(alias_str,table->table.length+1)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6117
      DBUG_RETURN(0);
6118
  }
6119
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6120
    DBUG_RETURN(0);				/* purecov: inspected */
peter@mysql.com's avatar
peter@mysql.com committed
6121
  if (table->db.str)
6122 6123 6124 6125 6126 6127 6128 6129
  {
    ptr->db= table->db.str;
    ptr->db_length= table->db.length;
  }
  else if (thd->db)
  {
    ptr->db= thd->db;
    ptr->db_length= thd->db_length;
6130
    ptr->current_db_used= 1;
6131 6132 6133
  }
  else
  {
6134 6135
    /* The following can't be "" as we may do 'casedn_str()' on it */
    ptr->db= empty_c_string;
6136
    ptr->db_length= 0;
6137
    ptr->current_db_used= 1;
6138
  }
konstantin@mysql.com's avatar
konstantin@mysql.com committed
6139
  if (thd->stmt_arena->is_stmt_prepare_or_first_sp_execute())
6140
    ptr->db= thd->strdup(ptr->db);
peter@mysql.com's avatar
peter@mysql.com committed
6141

6142
  ptr->alias= alias_str;
6143 6144
  if (lower_case_table_names && table->table.length)
    my_casedn_str(files_charset_info, table->table.str);
6145 6146
  ptr->table_name=table->table.str;
  ptr->table_name_length=table->table.length;
6147
  ptr->lock_type=   lock_type;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6148 6149
  ptr->updating=    test(table_options & TL_OPTION_UPDATING);
  ptr->force_index= test(table_options & TL_OPTION_FORCE_INDEX);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
6150
  ptr->ignore_leaves= test(table_options & TL_OPTION_IGNORE_LEAVES);
6151
  ptr->derived=	    table->sel;
6152 6153 6154
  if (!my_strcasecmp(system_charset_info, ptr->db,
                     information_schema_name.str))
  {
6155
    ST_SCHEMA_TABLE *schema_table= find_schema_table(thd, ptr->table_name);
6156 6157 6158
    if (!schema_table ||
        (schema_table->hidden && 
         lex->orig_sql_command == SQLCOM_END))  // not a 'show' command
6159
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6160
      my_error(ER_UNKNOWN_TABLE, MYF(0),
6161
               ptr->table_name, information_schema_name.str);
6162 6163
      DBUG_RETURN(0);
    }
6164
    ptr->schema_table_name= ptr->table_name;
6165 6166
    ptr->schema_table= schema_table;
  }
6167
  ptr->select_lex=  lex->current_select;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6168
  ptr->cacheable_table= 1;
6169 6170 6171 6172 6173 6174
  if (use_index_arg)
    ptr->use_index=(List<String> *) thd->memdup((gptr) use_index_arg,
						sizeof(*use_index_arg));
  if (ignore_index_arg)
    ptr->ignore_index=(List<String> *) thd->memdup((gptr) ignore_index_arg,
						   sizeof(*ignore_index_arg));
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
6175
  ptr->option= option ? option->str : 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6176
  /* check that used name is unique */
6177
  if (lock_type != TL_IGNORE)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6178
  {
timour@mysql.com's avatar
timour@mysql.com committed
6179 6180 6181 6182
    TABLE_LIST *first_table= (TABLE_LIST*) table_list.first;
    if (lex->sql_command == SQLCOM_CREATE_VIEW)
      first_table= first_table ? first_table->next_local : NULL;
    for (TABLE_LIST *tables= first_table ;
6183
	 tables ;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6184
	 tables=tables->next_local)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6185
    {
6186 6187
      if (!my_strcasecmp(table_alias_charset, alias_str, tables->alias) &&
	  !strcmp(ptr->db, tables->db))
6188
      {
6189
	my_error(ER_NONUNIQ_TABLE, MYF(0), alias_str); /* purecov: tested */
6190 6191
	DBUG_RETURN(0);				/* purecov: tested */
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6192 6193
    }
  }
6194 6195 6196
  /* Store the table reference preceding the current one. */
  if (table_list.elements > 0)
  {
6197 6198 6199 6200 6201 6202
    /*
      table_list.next points to the last inserted TABLE_LIST->next_local'
      element
    */
    previous_table_ref= (TABLE_LIST*) (table_list.next -
                                       offsetof(TABLE_LIST, next_local));
6203
    DBUG_ASSERT(previous_table_ref);
6204 6205 6206 6207 6208 6209 6210 6211
    /*
      Set next_name_resolution_table of the previous table reference to point
      to the current table reference. In effect the list
      TABLE_LIST::next_name_resolution_table coincides with
      TABLE_LIST::next_local. Later this may be changed in
      store_top_level_join_columns() for NATURAL/USING joins.
    */
    previous_table_ref->next_name_resolution_table= ptr;
6212
  }
6213

6214 6215 6216 6217 6218 6219
  /*
    Link the current table reference in a local list (list for current select).
    Notice that as a side effect here we set the next_local field of the
    previous table reference to 'ptr'. Here we also add one element to the
    list 'table_list'.
  */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6220
  table_list.link_in_list((byte*) ptr, (byte**) &ptr->next_local);
6221
  ptr->next_name_resolution_table= NULL;
6222
  /* Link table in global list (all used tables) */
6223
  lex->add_to_query_tables(ptr);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6224 6225 6226
  DBUG_RETURN(ptr);
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
6227

6228 6229 6230 6231
/*
  Initialize a new table list for a nested join

  SYNOPSIS
6232
    init_nested_join()
6233
    thd         current thread
6234

6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253
  DESCRIPTION
    The function initializes a structure of the TABLE_LIST type
    for a nested join. It sets up its nested join list as empty.
    The created structure is added to the front of the current
    join list in the st_select_lex object. Then the function
    changes the current nest level for joins to refer to the newly
    created empty list after having saved the info on the old level
    in the initialized structure.

  RETURN VALUE
    0,  if success
    1,  otherwise
*/

bool st_select_lex::init_nested_join(THD *thd)
{
  TABLE_LIST *ptr;
  NESTED_JOIN *nested_join;
  DBUG_ENTER("init_nested_join");
6254

6255 6256
  if (!(ptr= (TABLE_LIST*) thd->calloc(ALIGN_SIZE(sizeof(TABLE_LIST))+
                                       sizeof(NESTED_JOIN))))
6257
    DBUG_RETURN(1);
6258 6259 6260
  nested_join= ptr->nested_join=
    ((NESTED_JOIN*) ((byte*) ptr + ALIGN_SIZE(sizeof(TABLE_LIST))));

6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280
  join_list->push_front(ptr);
  ptr->embedding= embedding;
  ptr->join_list= join_list;
  embedding= ptr;
  join_list= &nested_join->join_list;
  join_list->empty();
  DBUG_RETURN(0);
}


/*
  End a nested join table list

  SYNOPSIS
    end_nested_join()
    thd         current thread

  DESCRIPTION
    The function returns to the previous join nest level.
    If the current level contains only one member, the function
6281
    moves it one level up, eliminating the nest.
6282 6283 6284 6285 6286 6287 6288 6289 6290

  RETURN VALUE
    Pointer to TABLE_LIST element added to the total table list, if success
    0, otherwise
*/

TABLE_LIST *st_select_lex::end_nested_join(THD *thd)
{
  TABLE_LIST *ptr;
6291
  NESTED_JOIN *nested_join;
6292
  DBUG_ENTER("end_nested_join");
6293

6294
  DBUG_ASSERT(embedding);
6295 6296 6297
  ptr= embedding;
  join_list= ptr->join_list;
  embedding= ptr->embedding;
6298
  nested_join= ptr->nested_join;
6299 6300 6301 6302 6303 6304 6305 6306 6307
  if (nested_join->join_list.elements == 1)
  {
    TABLE_LIST *embedded= nested_join->join_list.head();
    join_list->pop();
    embedded->join_list= join_list;
    embedded->embedding= embedding;
    join_list->push_front(embedded);
    ptr= embedded;
  }
6308
  else if (nested_join->join_list.elements == 0)
6309 6310
  {
    join_list->pop();
6311
    ptr= 0;                                     // return value
6312
  }
6313 6314 6315 6316 6317 6318 6319 6320
  DBUG_RETURN(ptr);
}


/*
  Nest last join operation

  SYNOPSIS
6321
    nest_last_join()
6322 6323 6324 6325 6326 6327
    thd         current thread

  DESCRIPTION
    The function nest last join operation as if it was enclosed in braces.

  RETURN VALUE
6328 6329 6330
    0  Error
    #  Pointer to TABLE_LIST element created for the new nested join

6331 6332 6333 6334 6335 6336
*/

TABLE_LIST *st_select_lex::nest_last_join(THD *thd)
{
  TABLE_LIST *ptr;
  NESTED_JOIN *nested_join;
6337
  List<TABLE_LIST> *embedded_list;
6338
  DBUG_ENTER("nest_last_join");
6339

6340 6341
  if (!(ptr= (TABLE_LIST*) thd->calloc(ALIGN_SIZE(sizeof(TABLE_LIST))+
                                       sizeof(NESTED_JOIN))))
6342
    DBUG_RETURN(0);
6343 6344 6345
  nested_join= ptr->nested_join=
    ((NESTED_JOIN*) ((byte*) ptr + ALIGN_SIZE(sizeof(TABLE_LIST))));

6346 6347
  ptr->embedding= embedding;
  ptr->join_list= join_list;
6348
  embedded_list= &nested_join->join_list;
6349
  embedded_list->empty();
6350 6351

  for (uint i=0; i < 2; i++)
6352 6353 6354 6355 6356
  {
    TABLE_LIST *table= join_list->pop();
    table->join_list= embedded_list;
    table->embedding= ptr;
    embedded_list->push_back(table);
6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369
    if (table->natural_join)
    {
      ptr->is_natural_join= TRUE;
      /*
        If this is a JOIN ... USING, move the list of joined fields to the
        table reference that describes the join.
      */
      if (table->join_using_fields)
      {
        ptr->join_using_fields= table->join_using_fields;
        table->join_using_fields= NULL;
      }
    }
6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409
  }
  join_list->push_front(ptr);
  nested_join->used_tables= nested_join->not_null_tables= (table_map) 0;
  DBUG_RETURN(ptr);
}


/*
  Add a table to the current join list

  SYNOPSIS
    add_joined_table()
    table       the table to add

  DESCRIPTION
    The function puts a table in front of the current join list
    of st_select_lex object.
    Thus, joined tables are put into this list in the reverse order
    (the most outer join operation follows first).

  RETURN VALUE
    None
*/

void st_select_lex::add_joined_table(TABLE_LIST *table)
{
  DBUG_ENTER("add_joined_table");
  join_list->push_front(table);
  table->join_list= join_list;
  table->embedding= embedding;
  DBUG_VOID_RETURN;
}


/*
  Convert a right join into equivalent left join

  SYNOPSIS
    convert_right_join()
    thd         current thread
6410 6411 6412

  DESCRIPTION
    The function takes the current join list t[0],t[1] ... and
6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435
    effectively converts it into the list t[1],t[0] ...
    Although the outer_join flag for the new nested table contains
    JOIN_TYPE_RIGHT, it will be handled as the inner table of a left join
    operation.

  EXAMPLES
    SELECT * FROM t1 RIGHT JOIN t2 ON on_expr =>
      SELECT * FROM t2 LEFT JOIN t1 ON on_expr

    SELECT * FROM t1,t2 RIGHT JOIN t3 ON on_expr =>
      SELECT * FROM t1,t3 LEFT JOIN t2 ON on_expr

    SELECT * FROM t1,t2 RIGHT JOIN (t3,t4) ON on_expr =>
      SELECT * FROM t1,(t3,t4) LEFT JOIN t2 ON on_expr

    SELECT * FROM t1 LEFT JOIN t2 ON on_expr1 RIGHT JOIN t3  ON on_expr2 =>
      SELECT * FROM t3 LEFT JOIN (t1 LEFT JOIN t2 ON on_expr2) ON on_expr1

  RETURN
    Pointer to the table representing the inner table, if success
    0, otherwise
*/

6436
TABLE_LIST *st_select_lex::convert_right_join()
6437 6438
{
  TABLE_LIST *tab2= join_list->pop();
6439
  TABLE_LIST *tab1= join_list->pop();
6440 6441 6442 6443 6444 6445 6446 6447 6448
  DBUG_ENTER("convert_right_join");

  join_list->push_front(tab2);
  join_list->push_front(tab1);
  tab1->outer_join|= JOIN_TYPE_RIGHT;

  DBUG_RETURN(tab1);
}

6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461
/*
  Set lock for all tables in current select level

  SYNOPSIS:
    set_lock_for_tables()
    lock_type			Lock to set for tables

  NOTE:
    If lock is a write lock, then tables->updating is set 1
    This is to get tables_ok to know that the table is updated by the
    query
*/

6462
void st_select_lex::set_lock_for_tables(thr_lock_type lock_type)
6463 6464 6465 6466 6467 6468
{
  bool for_update= lock_type >= TL_READ_NO_INSERT;
  DBUG_ENTER("set_lock_for_tables");
  DBUG_PRINT("enter", ("lock_type: %d  for_update: %d", lock_type,
		       for_update));

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6469 6470 6471
  for (TABLE_LIST *tables= (TABLE_LIST*) table_list.first;
       tables;
       tables= tables->next_local)
6472 6473 6474 6475 6476 6477 6478
  {
    tables->lock_type= lock_type;
    tables->updating=  for_update;
  }
  DBUG_VOID_RETURN;
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
6479

6480 6481 6482 6483 6484 6485
/*
  Create a new name resolution context for a JOIN ... ON clause.

  SYNOPSIS
    make_join_on_context()
    thd       pointer to current thread
timour@mysql.com's avatar
timour@mysql.com committed
6486
    left_op   left  operand of the JOIN
6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502
    right_op  rigth operand of the JOIN

  DESCRIPTION
    Create a new name resolution context for a JOIN ... ON clause,
    and set the first and last leaves of the list of table references
    to be used for name resolution.

  RETURN
    A new context if all is OK
    NULL - if a memory allocation error occured
*/

Name_resolution_context *
make_join_on_context(THD *thd, TABLE_LIST *left_op, TABLE_LIST *right_op)
{
  Name_resolution_context *on_context;
6503
  if (!(on_context= new (thd->mem_root) Name_resolution_context))
6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530
    return NULL;
  on_context->init();
  on_context->first_name_resolution_table=
    left_op->first_leaf_for_name_resolution();
  on_context->last_name_resolution_table=
    right_op->last_leaf_for_name_resolution();
  return on_context;
}


/*
  Add an ON condition to the second operand of a JOIN ... ON.

  SYNOPSIS
    add_join_on
    b     the second operand of a JOIN ... ON
    expr  the condition to be added to the ON clause

  DESCRIPTION
    Add an ON condition to the right operand of a JOIN ... ON clause.

  RETURN
    FALSE  if there was some error
    TRUE   if all is OK
*/

void add_join_on(TABLE_LIST *b, Item *expr)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6531
{
6532
  if (expr)
6533
  {
6534
    if (!b->on_expr)
6535
      b->on_expr= expr;
6536 6537
    else
    {
6538 6539 6540 6541 6542 6543
      /*
        If called from the parser, this happens if you have both a
        right and left join. If called later, it happens if we add more
        than one condition to the ON clause.
      */
      b->on_expr= new Item_cond_and(b->on_expr,expr);
6544 6545
    }
    b->on_expr->top_level_item();
6546
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6547 6548 6549
}


6550
/*
6551 6552
  Mark that there is a NATURAL JOIN or JOIN ... USING between two
  tables.
6553 6554 6555

  SYNOPSIS
    add_join_natural()
6556 6557 6558 6559
    a			Left join argument
    b			Right join argument
    using_fields        Field names from USING clause
  
6560
  IMPLEMENTATION
6561 6562 6563 6564 6565 6566 6567 6568 6569 6570
    This function marks that table b should be joined with a either via
    a NATURAL JOIN or via JOIN ... USING. Both join types are special
    cases of each other, so we treat them together. The function
    setup_conds() creates a list of equal condition between all fields
    of the same name for NATURAL JOIN or the fields in 'using_fields'
    for JOIN ... USING. The list of equality conditions is stored
    either in b->on_expr, or in JOIN::conds, depending on whether there
    was an outer join.

  EXAMPLE
6571 6572 6573
    SELECT * FROM t1 NATURAL LEFT JOIN t2
     <=>
    SELECT * FROM t1 LEFT JOIN t2 ON (t1.i=t2.i and t1.j=t2.j ... )
6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584

    SELECT * FROM t1 NATURAL JOIN t2 WHERE <some_cond>
     <=>
    SELECT * FROM t1, t2 WHERE (t1.i=t2.i and t1.j=t2.j and <some_cond>)

    SELECT * FROM t1 JOIN t2 USING(j) WHERE <some_cond>
     <=>
    SELECT * FROM t1, t2 WHERE (t1.j=t2.j and <some_cond>)

  RETURN
    None
6585 6586
*/

6587
void add_join_natural(TABLE_LIST *a, TABLE_LIST *b, List<String> *using_fields)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6588
{
6589 6590
  b->natural_join= a;
  b->join_using_fields= using_fields;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6591 6592
}

6593

6594
/*
6595 6596 6597 6598
  Reload/resets privileges and the different caches.

  SYNOPSIS
    reload_acl_and_cache()
6599
    thd			Thread handler (can be NULL!)
6600 6601 6602 6603 6604
    options             What should be reset/reloaded (tables, privileges,
    slave...)
    tables              Tables to flush (if any)
    write_to_binlog     Depending on 'options', it may be very bad to write the
                        query to the binlog (e.g. FLUSH SLAVE); this is a
6605 6606 6607
                        pointer where reload_acl_and_cache() will put 0 if
                        it thinks we really should not write to the binlog.
                        Otherwise it will put 1.
6608 6609 6610

  RETURN
    0	 ok
6611
    !=0  error.  thd->killed or thd->net.report_error is set
6612 6613
*/

6614 6615
bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables,
                          bool *write_to_binlog)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6616 6617 6618
{
  bool result=0;
  select_errors=0;				/* Write if more errors */
6619
  bool tmp_write_to_binlog= 1;
6620

6621
  if (thd && thd->in_sub_stmt)
6622 6623 6624 6625 6626
  {
    my_error(ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG, MYF(0), "FLUSH");
    return 1;
  }

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
6627
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6628 6629
  if (options & REFRESH_GRANT)
  {
6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648
    THD *tmp_thd= 0;
    /*
      If reload_acl_and_cache() is called from SIGHUP handler we have to
      allocate temporary THD for execution of acl_reload()/grant_reload().
    */
    if (!thd && (thd= (tmp_thd= new THD)))
      thd->store_globals();
    if (thd)
    {
      (void)acl_reload(thd);
      (void)grant_reload(thd);
    }
    if (tmp_thd)
    {
      delete tmp_thd;
      /* Remember that we don't have a THD */
      my_pthread_setspecific_ptr(THR_THD,  0);
      thd= 0;
    }
6649
    reset_mqh((LEX_USER *)NULL, TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6650
  }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
6651
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6652 6653
  if (options & REFRESH_LOG)
  {
6654
    /*
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6655 6656
      Flush the normal query log, the update log, the binary log,
      the slow query log, and the relay log (if it exists).
6657
    */
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6658

6659
    /*
monty@mysql.com's avatar
monty@mysql.com committed
6660 6661 6662 6663
      Writing this command to the binlog may result in infinite loops
      when doing mysqlbinlog|mysql, and anyway it does not really make
      sense to log it automatically (would cause more trouble to users
      than it would help them)
6664 6665
    */
    tmp_write_to_binlog= 0;
6666 6667
    mysql_log.new_file(1);
    mysql_slow_log.new_file(1);
6668
    mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
6669
#ifdef HAVE_REPLICATION
6670
    pthread_mutex_lock(&LOCK_active_mi);
6671
    rotate_relay_log(active_mi);
6672
    pthread_mutex_unlock(&LOCK_active_mi);
6673
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6674 6675
    if (ha_flush_logs())
      result=1;
6676 6677
    if (flush_error_log())
      result=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6678
  }
6679
#ifdef HAVE_QUERY_CACHE
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6680 6681
  if (options & REFRESH_QUERY_CACHE_FREE)
  {
6682
    query_cache.pack();				// FLUSH QUERY CACHE
6683
    options &= ~REFRESH_QUERY_CACHE;    // Don't flush cache, just free memory
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6684 6685 6686
  }
  if (options & (REFRESH_TABLES | REFRESH_QUERY_CACHE))
  {
6687
    query_cache.flush();			// RESET QUERY CACHE
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6688
  }
6689
#endif /*HAVE_QUERY_CACHE*/
6690 6691 6692 6693 6694
  /*
    Note that if REFRESH_READ_LOCK bit is set then REFRESH_TABLES is set too
    (see sql_yacc.yy)
  */
  if (options & (REFRESH_TABLES | REFRESH_READ_LOCK)) 
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6695
  {
6696
    if ((options & REFRESH_READ_LOCK) && thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6697
    {
6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708
      /*
        We must not try to aspire a global read lock if we have a write
        locked table. This would lead to a deadlock when trying to
        reopen (and re-lock) the table after the flush.
      */
      if (thd->locked_tables)
      {
        THR_LOCK_DATA **lock_p= thd->locked_tables->locks;
        THR_LOCK_DATA **end_p= lock_p + thd->locked_tables->lock_count;

        for (; lock_p < end_p; lock_p++)
monty@mysql.com's avatar
monty@mysql.com committed
6709
        {
6710 6711 6712 6713 6714
          if ((*lock_p)->type == TL_WRITE)
          {
            my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0));
            return 1;
          }
monty@mysql.com's avatar
monty@mysql.com committed
6715
        }
6716
      }
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
6717 6718 6719 6720
      /*
	Writing to the binlog could cause deadlocks, as we don't log
	UNLOCK TABLES
      */
6721
      tmp_write_to_binlog= 0;
6722
      if (lock_global_read_lock(thd))
6723
	return 1;                               // Killed
6724 6725
      result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1,
                                 tables);
6726
      if (make_global_read_lock_block_commit(thd)) // Killed
6727 6728 6729 6730 6731
      {
        /* Don't leave things in a half-locked state */
        unlock_global_read_lock(thd);
        return 1;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6732
    }
6733 6734
    else
      result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1, tables);
6735
    my_dbopt_cleanup();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6736 6737 6738
  }
  if (options & REFRESH_HOSTS)
    hostname_cache_refresh();
monty@mysql.com's avatar
monty@mysql.com committed
6739
  if (thd && (options & REFRESH_STATUS))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6740 6741 6742
    refresh_status();
  if (options & REFRESH_THREADS)
    flush_thread_cache();
6743
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6744
  if (options & REFRESH_MASTER)
6745 6746
  {
    tmp_write_to_binlog= 0;
6747
    if (reset_master(thd))
6748
    {
6749
      result=1;
6750 6751
      thd->fatal_error();                       // Ensure client get error
    }
6752
  }
6753
#endif
6754
#ifdef OPENSSL
6755 6756 6757 6758 6759 6760
   if (options & REFRESH_DES_KEY_FILE)
   {
     if (des_key_file)
       result=load_des_key_file(des_key_file);
   }
#endif
6761
#ifdef HAVE_REPLICATION
6762 6763
 if (options & REFRESH_SLAVE)
 {
6764
   tmp_write_to_binlog= 0;
6765
   pthread_mutex_lock(&LOCK_active_mi);
6766
   if (reset_slave(thd, active_mi))
6767
     result=1;
6768
   pthread_mutex_unlock(&LOCK_active_mi);
6769
 }
6770
#endif
6771
 if (options & REFRESH_USER_RESOURCES)
monty@mysql.com's avatar
monty@mysql.com committed
6772
   reset_mqh((LEX_USER *) NULL);
6773
 *write_to_binlog= tmp_write_to_binlog;
6774
 return result;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6775 6776
}

6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788
/*
  kill on thread

  SYNOPSIS
    kill_one_thread()
    thd			Thread class
    id			Thread id

  NOTES
    This is written such that we have a short lock on LOCK_thread_count
*/

hf@genie.(none)'s avatar
SCRUM  
hf@genie.(none) committed
6789
void kill_one_thread(THD *thd, ulong id, bool only_kill_query)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6790 6791 6792
{
  THD *tmp;
  uint error=ER_NO_SUCH_THREAD;
6793 6794
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
  I_List_iterator<THD> it(threads);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6795 6796 6797 6798
  while ((tmp=it++))
  {
    if (tmp->thread_id == id)
    {
6799 6800
      pthread_mutex_lock(&tmp->LOCK_delete);	// Lock from delete
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6801 6802 6803
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
6804 6805
  if (tmp)
  {
6806 6807
    if ((thd->security_ctx->master_access & SUPER_ACL) ||
	!strcmp(thd->security_ctx->user, tmp->security_ctx->user))
6808
    {
hf@genie.(none)'s avatar
SCRUM  
hf@genie.(none) committed
6809
      tmp->awake(only_kill_query ? THD::KILL_QUERY : THD::KILL_CONNECTION);
6810 6811 6812 6813 6814 6815 6816
      error=0;
    }
    else
      error=ER_KILL_DENIED_ERROR;
    pthread_mutex_unlock(&tmp->LOCK_delete);
  }

bk@work.mysql.com's avatar
bk@work.mysql.com committed
6817
  if (!error)
6818
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6819
  else
6820
    my_error(error, MYF(0), id);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6821 6822
}

timour@mysql.com's avatar
timour@mysql.com committed
6823

bk@work.mysql.com's avatar
bk@work.mysql.com committed
6824 6825 6826 6827 6828 6829 6830 6831
/* Clear most status variables */

static void refresh_status(void)
{
  pthread_mutex_lock(&LOCK_status);
  for (struct show_var_st *ptr=status_vars; ptr->name; ptr++)
  {
    if (ptr->type == SHOW_LONG)
6832
      *(ulong*) ptr->value= 0;
6833 6834 6835 6836 6837 6838 6839
    else if (ptr->type == SHOW_LONG_STATUS)
    {
      THD *thd= current_thd;
      /* We must update the global status before cleaning up the thread */
      add_to_status(&global_status_var, &thd->status_var);
      bzero((char*) &thd->status_var, sizeof(thd->status_var));
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6840
  }
timour@mysql.com's avatar
timour@mysql.com committed
6841 6842
  /* Reset the counters of all key caches (default and named). */
  process_key_caches(reset_key_cache_counters);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6843 6844
  pthread_mutex_unlock(&LOCK_status);
}
6845 6846 6847 6848


	/* If pointer is not a null pointer, append filename to it */

6849 6850
static bool append_file_to_dir(THD *thd, const char **filename_ptr,
			       const char *table_name)
6851
{
6852
  char buff[FN_REFLEN],*ptr, *end;
6853 6854 6855 6856 6857 6858 6859
  if (!*filename_ptr)
    return 0;					// nothing to do

  /* Check that the filename is not too long and it's a hard path */
  if (strlen(*filename_ptr)+strlen(table_name) >= FN_REFLEN-1 ||
      !test_if_hard_path(*filename_ptr))
  {
6860
    my_error(ER_WRONG_TABLE_NAME, MYF(0), *filename_ptr);
6861 6862 6863 6864
    return 1;
  }
  /* Fix is using unix filename format on dos */
  strmov(buff,*filename_ptr);
6865
  end=convert_dirname(buff, *filename_ptr, NullS);
6866
  if (!(ptr=thd->alloc((uint) (end-buff)+(uint) strlen(table_name)+1)))
6867 6868
    return 1;					// End of memory
  *filename_ptr=ptr;
6869
  strxmov(ptr,buff,table_name,NullS);
6870 6871
  return 0;
}
6872

6873

6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887
/*
  Check if the select is a simple select (not an union)

  SYNOPSIS
    check_simple_select()

  RETURN VALUES
    0	ok
    1	error	; In this case the error messege is sent to the client
*/

bool check_simple_select()
{
  THD *thd= current_thd;
6888 6889
  LEX *lex= thd->lex;
  if (lex->current_select != &lex->select_lex)
6890 6891
  {
    char command[80];
6892 6893
    strmake(command, lex->yylval->symbol.str,
	    min(lex->yylval->symbol.length, sizeof(command)-1));
6894
    my_error(ER_CANT_USE_OPTION_HERE, MYF(0), command);
6895 6896 6897 6898
    return 1;
  }
  return 0;
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6899

6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915
/*
  Setup locking for multi-table updates. Used by the replication slave.
  Replication slave SQL thread examines (all_tables_not_ok()) the
  locking state of referenced tables to determine if the query has to
  be executed or ignored. Since in multi-table update, the 
  'default' lock is read-only, this lock is corrected early enough by
  calling this function, before the slave decides to execute/ignore.

  SYNOPSIS
    check_multi_update_lock()
    thd		Current thread

  RETURN VALUES
    0	ok
    1	error
*/
6916
static bool check_multi_update_lock(THD *thd)
6917 6918
{
  bool res= 1;
6919 6920
  LEX *lex= thd->lex;
  TABLE_LIST *table, *tables= lex->query_tables;
6921 6922 6923 6924 6925 6926 6927 6928 6929
  DBUG_ENTER("check_multi_update_lock");
  
  if (check_db_used(thd, tables))
    goto error;

  /*
    Ensure that we have UPDATE or SELECT privilege for each table
    The exact privilege is checked in mysql_multi_update()
  */
6930
  for (table= tables ; table ; table= table->next_local)
6931
  {
6932 6933
    TABLE_LIST *save= table->next_local;
    table->next_local= 0;
6934 6935 6936
    if ((check_access(thd, UPDATE_ACL, table->db, 
                      &table->grant.privilege,0,1, test(table->schema_table)) ||
         (grant_option && check_grant(thd, UPDATE_ACL, table,0,1,1))) &&
6937
	check_one_table_access(thd, SELECT_ACL, table))
6938
      goto error;
6939
    table->next_local= save;
6940 6941
  }
    
6942
  if (mysql_multi_update_prepare(thd))
6943 6944 6945 6946 6947 6948 6949
    goto error;
  
  res= 0;
  
error:
  DBUG_RETURN(res);
}
6950

6951

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6952
Comp_creator *comp_eq_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6953
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6954
  return invert?(Comp_creator *)&ne_creator:(Comp_creator *)&eq_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6955 6956
}

6957

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6958
Comp_creator *comp_ge_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6959
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6960
  return invert?(Comp_creator *)&lt_creator:(Comp_creator *)&ge_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6961 6962
}

6963

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6964
Comp_creator *comp_gt_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6965
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6966
  return invert?(Comp_creator *)&le_creator:(Comp_creator *)&gt_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6967 6968
}

6969

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6970
Comp_creator *comp_le_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6971
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6972
  return invert?(Comp_creator *)&gt_creator:(Comp_creator *)&le_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6973 6974
}

6975

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6976
Comp_creator *comp_lt_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6977
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6978
  return invert?(Comp_creator *)&ge_creator:(Comp_creator *)&lt_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6979 6980
}

6981

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6982
Comp_creator *comp_ne_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6983
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6984
  return invert?(Comp_creator *)&eq_creator:(Comp_creator *)&ne_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6985
}
6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005


/*
  Construct ALL/ANY/SOME subquery Item

  SYNOPSIS
    all_any_subquery_creator()
    left_expr - pointer to left expression
    cmp - compare function creator
    all - true if we create ALL subquery
    select_lex - pointer on parsed subquery structure

  RETURN VALUE
    constructed Item (or 0 if out of memory)
*/
Item * all_any_subquery_creator(Item *left_expr,
				chooser_compare_func_creator cmp,
				bool all,
				SELECT_LEX *select_lex)
{
serg@serg.mylan's avatar
serg@serg.mylan committed
7006
  if ((cmp == &comp_eq_creator) && !all)       //  = ANY <=> IN
7007
    return new Item_in_subselect(left_expr, select_lex);
serg@serg.mylan's avatar
serg@serg.mylan committed
7008 7009

  if ((cmp == &comp_ne_creator) && all)        // <> ALL <=> NOT IN
7010 7011 7012
    return new Item_func_not(new Item_in_subselect(left_expr, select_lex));

  Item_allany_subselect *it=
7013
    new Item_allany_subselect(left_expr, (*cmp)(all), select_lex, all);
7014
  if (all)
7015
    return it->upper_item= new Item_func_not_all(it);	/* ALL */
7016

7017
  return it->upper_item= new Item_func_nop_all(it);      /* ANY/SOME */
7018
}
7019 7020


7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032
/*
  CREATE INDEX and DROP INDEX are implemented by calling ALTER TABLE with
  the proper arguments.  This isn't very fast but it should work for most
  cases.

  In the future ALTER TABLE will notice that only added indexes
  and create these one by one for the existing table without having to do
  a full rebuild.

  One should normally create all indexes with CREATE TABLE or ALTER TABLE.
*/

7033
bool mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys)
7034 7035
{
  List<create_field> fields;
7036 7037
  ALTER_INFO alter_info;
  alter_info.flags= ALTER_ADD_INDEX;
7038 7039 7040 7041 7042
  HA_CREATE_INFO create_info;
  DBUG_ENTER("mysql_create_index");
  bzero((char*) &create_info,sizeof(create_info));
  create_info.db_type=DB_TYPE_DEFAULT;
  create_info.default_table_charset= thd->variables.collation_database;
7043
  DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
7044
				&create_info, table_list,
7045
				fields, keys, 0, (ORDER*)0,
monty@mysql.com's avatar
monty@mysql.com committed
7046
				DUP_ERROR, 0, &alter_info, 1));
7047 7048 7049
}


7050
bool mysql_drop_index(THD *thd, TABLE_LIST *table_list, ALTER_INFO *alter_info)
7051 7052 7053 7054 7055 7056 7057 7058
{
  List<create_field> fields;
  List<Key> keys;
  HA_CREATE_INFO create_info;
  DBUG_ENTER("mysql_drop_index");
  bzero((char*) &create_info,sizeof(create_info));
  create_info.db_type=DB_TYPE_DEFAULT;
  create_info.default_table_charset= thd->variables.collation_database;
7059 7060
  alter_info->clear();
  alter_info->flags= ALTER_DROP_INDEX;
7061
  DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
7062
				&create_info, table_list,
7063
				fields, keys, 0, (ORDER*)0,
monty@mysql.com's avatar
monty@mysql.com committed
7064
				DUP_ERROR, 0, alter_info, 1));
7065
}
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
7066 7067


7068 7069 7070 7071 7072
/*
  Multi update query pre-check

  SYNOPSIS
    multi_update_precheck()
7073
    thd		Thread handler
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7074
    tables	Global/local table list (have to be the same)
7075

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7076
  RETURN VALUE
7077 7078
    FALSE OK
    TRUE  Error
7079
*/
7080

7081
bool multi_update_precheck(THD *thd, TABLE_LIST *tables)
7082 7083 7084 7085 7086
{
  const char *msg= 0;
  TABLE_LIST *table;
  LEX *lex= thd->lex;
  SELECT_LEX *select_lex= &lex->select_lex;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7087
  DBUG_ENTER("multi_update_precheck");
7088 7089 7090

  if (select_lex->item_list.elements != lex->value_list.elements)
  {
7091
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
7092
    DBUG_RETURN(TRUE);
7093 7094 7095 7096 7097
  }
  /*
    Ensure that we have UPDATE or SELECT privilege for each table
    The exact privilege is checked in mysql_multi_update()
  */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7098
  for (table= tables; table; table= table->next_local)
7099
  {
7100 7101 7102
    if (table->derived)
      table->grant.privilege= SELECT_ACL;
    else if ((check_access(thd, UPDATE_ACL, table->db,
7103 7104
                           &table->grant.privilege, 0, 1,
                           test(table->schema_table)) ||
7105 7106
              grant_option &&
              check_grant(thd, UPDATE_ACL, table, 0, 1, 1)) &&
monty@mysql.com's avatar
monty@mysql.com committed
7107
             (check_access(thd, SELECT_ACL, table->db,
7108 7109
                           &table->grant.privilege, 0, 0,
                           test(table->schema_table)) ||
monty@mysql.com's avatar
monty@mysql.com committed
7110
              grant_option && check_grant(thd, SELECT_ACL, table, 0, 1, 0)))
7111
      DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7112

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7113
    table->table_in_first_from_clause= 1;
7114
  }
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7115 7116 7117
  /*
    Is there tables of subqueries?
  */
7118
  if (&lex->select_lex != lex->all_selects_list || lex->time_zone_tables_used)
7119
  {
7120
    DBUG_PRINT("info",("Checking sub query list"));
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7121
    for (table= tables; table; table= table->next_global)
7122
    {
monty@mysql.com's avatar
monty@mysql.com committed
7123 7124 7125
      if (!my_tz_check_n_skip_implicit_tables(&table,
                                              lex->time_zone_tables_used) &&
          !table->table_in_first_from_clause)
7126 7127
      {
	if (check_access(thd, SELECT_ACL, table->db,
7128 7129
			 &table->grant.privilege, 0, 0,
                         test(table->schema_table)) ||
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7130
	    grant_option && check_grant(thd, SELECT_ACL, table, 0, 1, 0))
7131
	  DBUG_RETURN(TRUE);
7132 7133 7134 7135 7136 7137
      }
    }
  }

  if (select_lex->order_list.elements)
    msg= "ORDER BY";
7138
  else if (select_lex->select_limit)
7139 7140 7141 7142
    msg= "LIMIT";
  if (msg)
  {
    my_error(ER_WRONG_USAGE, MYF(0), "UPDATE", msg);
7143
    DBUG_RETURN(TRUE);
7144
  }
7145
  DBUG_RETURN(FALSE);
7146 7147 7148 7149 7150 7151 7152
}

/*
  Multi delete query pre-check

  SYNOPSIS
    multi_delete_precheck()
7153
    thd			Thread handler
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7154
    tables		Global/local table list
7155

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7156
  RETURN VALUE
7157 7158
    FALSE OK
    TRUE  error
7159
*/
7160

7161
bool multi_delete_precheck(THD *thd, TABLE_LIST *tables)
7162 7163 7164 7165
{
  SELECT_LEX *select_lex= &thd->lex->select_lex;
  TABLE_LIST *aux_tables=
    (TABLE_LIST *)thd->lex->auxilliary_table_list.first;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7166
  DBUG_ENTER("multi_delete_precheck");
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7167

7168 7169 7170 7171 7172
  /* sql_yacc guarantees that tables and aux_tables are not zero */
  DBUG_ASSERT(aux_tables != 0);
  if (check_db_used(thd, tables) || check_db_used(thd,aux_tables) ||
      check_table_access(thd,SELECT_ACL, tables,0) ||
      check_table_access(thd,DELETE_ACL, aux_tables,0))
7173
    DBUG_RETURN(TRUE);
7174 7175
  if ((thd->options & OPTION_SAFE_UPDATES) && !select_lex->where)
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7176 7177
    my_message(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE,
               ER(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE), MYF(0));
7178
    DBUG_RETURN(TRUE);
7179
  }
7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201 7202 7203 7204 7205 7206
  DBUG_RETURN(FALSE);
}


/*
  Link tables in auxilary table list of multi-delete with corresponding
  elements in main table list, and set proper locks for them.

  SYNOPSIS
    multi_delete_set_locks_and_link_aux_tables()
      lex - pointer to LEX representing multi-delete

  RETURN VALUE
    FALSE - success
    TRUE  - error
*/

bool multi_delete_set_locks_and_link_aux_tables(LEX *lex)
{
  TABLE_LIST *tables= (TABLE_LIST*)lex->select_lex.table_list.first;
  TABLE_LIST *target_tbl;
  DBUG_ENTER("multi_delete_set_locks_and_link_aux_tables");

  lex->table_count= 0;

  for (target_tbl= (TABLE_LIST *)lex->auxilliary_table_list.first;
       target_tbl; target_tbl= target_tbl->next_local)
7207
  {
7208
    lex->table_count++;
7209 7210
    /* All tables in aux_tables must be found in FROM PART */
    TABLE_LIST *walk;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7211
    for (walk= tables; walk; walk= walk->next_local)
7212
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7213 7214 7215
      if (!my_strcasecmp(table_alias_charset,
			 target_tbl->alias, walk->alias) &&
	  !strcmp(walk->db, target_tbl->db))
7216 7217 7218 7219
	break;
    }
    if (!walk)
    {
7220
      my_error(ER_UNKNOWN_TABLE, MYF(0),
7221
               target_tbl->table_name, "MULTI DELETE");
7222
      DBUG_RETURN(TRUE);
7223
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
7224 7225 7226 7227 7228
    if (!walk->derived)
    {
      target_tbl->table_name= walk->table_name;
      target_tbl->table_name_length= walk->table_name_length;
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
7229
    walk->updating= target_tbl->updating;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7230
    walk->lock_type= target_tbl->lock_type;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
7231
    target_tbl->correspondent_table= walk;	// Remember corresponding table
7232
  }
7233
  DBUG_RETURN(FALSE);
7234 7235 7236
}


bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7237 7238 7239 7240 7241
/*
  simple UPDATE query pre-check

  SYNOPSIS
    update_precheck()
7242 7243
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7244 7245

  RETURN VALUE
7246 7247
    FALSE OK
    TRUE  Error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7248
*/
7249

7250
bool update_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7251 7252 7253 7254
{
  DBUG_ENTER("update_precheck");
  if (thd->lex->select_lex.item_list.elements != thd->lex->value_list.elements)
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7255
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
7256
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7257
  }
7258 7259
  DBUG_RETURN(check_db_used(thd, tables) ||
	       check_one_table_access(thd, UPDATE_ACL, tables));
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7260 7261 7262 7263 7264 7265 7266 7267
}


/*
  simple DELETE query pre-check

  SYNOPSIS
    delete_precheck()
7268 7269
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7270 7271

  RETURN VALUE
7272 7273
    FALSE  OK
    TRUE   error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7274
*/
7275

7276
bool delete_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7277 7278 7279
{
  DBUG_ENTER("delete_precheck");
  if (check_one_table_access(thd, DELETE_ACL, tables))
7280
    DBUG_RETURN(TRUE);
7281
  /* Set privilege for the WHERE clause */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7282
  tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
7283
  DBUG_RETURN(FALSE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7284 7285 7286 7287 7288 7289 7290 7291
}


/*
  simple INSERT query pre-check

  SYNOPSIS
    insert_precheck()
7292 7293
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7294 7295

  RETURN VALUE
7296 7297
    FALSE  OK
    TRUE   error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7298
*/
7299

bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
7300
bool insert_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7301 7302 7303 7304
{
  LEX *lex= thd->lex;
  DBUG_ENTER("insert_precheck");

7305 7306 7307 7308
  /*
    Check that we have modify privileges for the first table and
    select privileges for the rest
  */
monty@mysql.com's avatar
monty@mysql.com committed
7309 7310 7311
  ulong privilege= (INSERT_ACL |
                    (lex->duplicates == DUP_REPLACE ? DELETE_ACL : 0) |
                    (lex->value_list.elements ? UPDATE_ACL : 0));
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7312 7313

  if (check_one_table_access(thd, privilege, tables))
7314
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7315

7316
  if (lex->update_list.elements != lex->value_list.elements)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7317
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7318
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
7319
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7320
  }
7321
  DBUG_RETURN(FALSE);
7322
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7323 7324 7325 7326 7327 7328 7329


/*
  CREATE TABLE query pre-check

  SYNOPSIS
    create_table_precheck()
7330 7331 7332
    thd			Thread handler
    tables		Global table list
    create_table	Table which will be created
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7333 7334

  RETURN VALUE
7335 7336
    FALSE   OK
    TRUE   Error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7337
*/
7338

7339 7340
bool create_table_precheck(THD *thd, TABLE_LIST *tables,
                           TABLE_LIST *create_table)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7341 7342
{
  LEX *lex= thd->lex;
7343 7344
  SELECT_LEX *select_lex= &lex->select_lex;
  ulong want_priv;
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
7345
  bool error= TRUE;                                 // Error message is given
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7346
  DBUG_ENTER("create_table_precheck");
7347 7348 7349

  want_priv= ((lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) ?
              CREATE_TMP_ACL : CREATE_ACL);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7350 7351
  lex->create_info.alias= create_table->alias;
  if (check_access(thd, want_priv, create_table->db,
7352 7353
		   &create_table->grant.privilege, 0, 0,
                   test(create_table->schema_table)) ||
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7354 7355 7356
      check_merge_table_access(thd, create_table->db,
			       (TABLE_LIST *)
			       lex->create_info.merge_list.first))
7357 7358 7359 7360 7361 7362 7363 7364 7365
    goto err;
  if (grant_option && want_priv != CREATE_TMP_ACL &&
      check_grant(thd, want_priv, create_table, 0, UINT_MAX, 0))
    goto err;

  if (select_lex->item_list.elements)
  {
    /* Check permissions for used tables in CREATE TABLE ... SELECT */

7366 7367
#ifdef NOT_NECESSARY_TO_CHECK_CREATE_TABLE_EXIST_WHEN_PREPARING_STATEMENT
    /* This code throws an ill error for CREATE TABLE t1 SELECT * FROM t1 */
7368
    /*
monty@mysql.com's avatar
monty@mysql.com committed
7369 7370 7371
      Only do the check for PS, becasue we on execute we have to check that
      against the opened tables to ensure we don't use a table that is part
      of the view (which can only be done after the table has been opened).
7372
    */
konstantin@mysql.com's avatar
konstantin@mysql.com committed
7373
    if (thd->stmt_arena->is_stmt_prepare_or_first_sp_execute())
7374
    {
monty@mysql.com's avatar
monty@mysql.com committed
7375 7376 7377 7378
      /*
        For temporary tables we don't have to check if the created table exists
      */
      if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
monty@mysql.com's avatar
monty@mysql.com committed
7379
          find_table_in_global_list(tables, create_table->db,
7380
                                    create_table->table_name))
monty@mysql.com's avatar
monty@mysql.com committed
7381
      {
7382
	error= FALSE;
monty@mysql.com's avatar
monty@mysql.com committed
7383 7384 7385
        goto err;
      }
    }
7386
#endif
7387 7388 7389
    if (tables && check_table_access(thd, SELECT_ACL, tables,0))
      goto err;
  }
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
7390
  error= FALSE;
7391 7392 7393

err:
  DBUG_RETURN(error);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7394
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7395 7396 7397 7398 7399 7400 7401


/*
  negate given expression

  SYNOPSIS
    negate_expression()
7402
    thd  thread handler
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413 7414 7415 7416 7417 7418 7419 7420 7421 7422 7423 7424 7425 7426 7427 7428 7429 7430
    expr expression for negation

  RETURN
    negated expression
*/

Item *negate_expression(THD *thd, Item *expr)
{
  Item *negated;
  if (expr->type() == Item::FUNC_ITEM &&
      ((Item_func *) expr)->functype() == Item_func::NOT_FUNC)
  {
    /* it is NOT(NOT( ... )) */
    Item *arg= ((Item_func *) expr)->arguments()[0];
    enum_parsing_place place= thd->lex->current_select->parsing_place;
    if (arg->is_bool_func() || place == IN_WHERE || place == IN_HAVING)
      return arg;
    /*
      if it is not boolean function then we have to emulate value of
      not(not(a)), it will be a != 0
    */
    return new Item_func_ne(arg, new Item_int((char*) "0", 0, 1));
  }

  if ((negated= expr->neg_transformer(thd)) != 0)
    return negated;
  return new Item_func_not(expr);
}
7431 7432 7433 7434 7435 7436 7437


/*
  Assign as view definer current user

  SYNOPSIS
    default_definer()
7438
    Secytity_context     current decurity context
7439 7440 7441 7442 7443 7444 7445
    definer              structure where it should be assigned

  RETURN
    FALSE   OK
    TRUE    Error
*/

7446
bool default_view_definer(Security_context *sctx, st_lex_user *definer)
7447
{
7448 7449 7450
  definer->user.str= sctx->priv_user;
  definer->user.length= strlen(sctx->priv_user);
  if (*sctx->priv_host != 0)
7451
  {
7452 7453
    definer->host.str= sctx->priv_host;
    definer->host.length= strlen(sctx->priv_host);
7454 7455 7456 7457 7458 7459 7460 7461
  }
  else
  {
    my_error(ER_NO_VIEW_USER, MYF(0));
    return TRUE;
  }
  return FALSE;
}