sql_parse.cc 203 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
#include "sp_head.h"
29
#include "sp.h"
30

31 32 33 34 35 36 37 38 39 40 41
#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?
*/
42 43 44
#define SSL_HANDSHAKE_SIZE      2
#define NORMAL_HANDSHAKE_SIZE   6
#define MIN_HANDSHAKE_SIZE      2
45
#else
46
#define MIN_HANDSHAKE_SIZE      6
47
#endif /* HAVE_OPENSSL */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
48

49 50 51 52 53 54
/* 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 || \
55
   (LP)->sql_command == SQLCOM_SHOW_CREATE_FUNC || \
56 57 58
   (LP)->sql_command == SQLCOM_DROP_FUNCTION ? \
   "FUNCTION" : "PROCEDURE")

59 60 61
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
62

63
static void time_out_user_resource_limits(THD *thd, USER_CONN *uc);
64
#ifndef NO_EMBEDDED_ACCESS_CHECKS
65
static int check_for_max_user_connections(THD *thd, USER_CONN *uc);
66
#endif
67
static void decrease_user_connections(USER_CONN *uc);
68
static bool check_db_used(THD *thd,TABLE_LIST *tables);
69
static bool check_multi_update_lock(THD *thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
70 71
static void remove_escape(char *name);
static void refresh_status(void);
72 73
static bool append_file_to_dir(THD *thd, const char **filename_ptr,
			       const char *table_name);
74
static void log_slow_query(THD *thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
75

76
const char *any_db="*any*";	// Special symbol for check_access
bk@work.mysql.com's avatar
bk@work.mysql.com committed
77 78 79 80

const char *command_name[]={
  "Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
  "Drop DB", "Refresh", "Shutdown", "Statistics", "Processlist",
81
  "Connect","Kill","Debug","Ping","Time","Delayed insert","Change user",
82
  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave",
83
  "Prepare", "Execute", "Long Data", "Close stmt",
84
  "Reset stmt", "Set option", "Fetch",
85
  "Error"					// Last command number
bk@work.mysql.com's avatar
bk@work.mysql.com committed
86 87
};

88 89 90 91
const char *xa_state_names[]={
  "NON-EXISTING", "ACTIVE", "IDLE", "PREPARED"
};

92
static char empty_c_string[1]= {0};		// Used for not defined 'db'
bk@work.mysql.com's avatar
bk@work.mysql.com committed
93 94 95 96

#ifdef __WIN__
static void  test_signal(int sig_ptr)
{
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
97
#if !defined( DBUG_OFF)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
98 99
  MessageBox(NULL,"Test signal","DBUG",MB_OK);
#endif
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
100
#if defined(OS2)
101 102
  fprintf(stderr, "Test signal %d\n", sig_ptr);
  fflush(stderr);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
103
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
104 105 106 107
}
static void init_signals(void)
{
  int signals[7] = {SIGINT,SIGILL,SIGFPE,SIGSEGV,SIGTERM,SIGBREAK,SIGABRT } ;
108
  for (int i=0 ; i < 7 ; i++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
109 110 111 112
    signal( signals[i], test_signal) ;
}
#endif

113 114 115 116 117
static void unlock_locked_tables(THD *thd)
{
  if (thd->locked_tables)
  {
    thd->lock=thd->locked_tables;
118
    thd->locked_tables=0;			// Will be automatically closed
119 120 121 122
    close_thread_tables(thd);			// Free tables
  }
}

123

124
static bool end_active_trans(THD *thd)
125
{
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
126
  int error=0;
127
  DBUG_ENTER("end_active_trans");
128
  if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN |
129
		      OPTION_TABLE_LOCK))
130
  {
131 132 133 134
    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;
135
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
136
    if (ha_commit(thd))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
137
      error=1;
138
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
139
  }
140
  DBUG_RETURN(error);
141 142
}

143 144 145 146 147 148 149 150 151 152 153 154 155
static bool begin_trans(THD *thd)
{
  int error=0;
  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
  {
156
    LEX *lex= thd->lex;
157 158 159 160
    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
161
      error= ha_start_consistent_snapshot(thd);
162 163 164
  }
  return error;
}
165

monty@mysql.com's avatar
monty@mysql.com committed
166
#ifdef HAVE_REPLICATION
167 168 169
inline bool all_tables_not_ok(THD *thd, TABLE_LIST *tables)
{
  return (table_rules_on && tables && !tables_ok(thd,tables) &&
monty@mysql.com's avatar
monty@mysql.com committed
170
          ((thd->lex->sql_command != SQLCOM_DELETE_MULTI) ||
monty@mysql.com's avatar
monty@mysql.com committed
171 172
           !tables_ok(thd,
		      (TABLE_LIST *)thd->lex->auxilliary_table_list.first)));
173
}
monty@mysql.com's avatar
monty@mysql.com committed
174
#endif
175 176


177 178
static HASH hash_user_connections;

179 180
static int get_or_create_user_conn(THD *thd, const char *user,
				   const char *host,
peter@mysql.com's avatar
peter@mysql.com committed
181
				   USER_RESOURCES *mqh)
182 183
{
  int return_val=0;
184
  uint temp_len, user_len;
185 186 187 188 189 190
  char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
  struct  user_conn *uc;

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

191 192
  user_len=strlen(user);
  temp_len= (strmov(strmov(temp_user, user)+1, host) - temp_user)+1;
193
  (void) pthread_mutex_lock(&LOCK_user_conn);
194 195
  if (!(uc = (struct  user_conn *) hash_search(&hash_user_connections,
					       (byte*) temp_user, temp_len)))
196
  {
197 198 199
    /* First connection for user; Create a user connection object */
    if (!(uc= ((struct user_conn*)
	       my_malloc(sizeof(struct user_conn) + temp_len+1,
200 201
			 MYF(MY_WME)))))
    {
202
      net_send_error(thd, 0, NullS);		// Out of memory
203 204
      return_val=1;
      goto end;
205
    }
206 207
    uc->user=(char*) (uc+1);
    memcpy(uc->user,temp_user,temp_len+1);
208
    uc->host= uc->user + user_len +  1;
209
    uc->len = temp_len;
210
    uc->connections= uc->questions= uc->updates= uc->conn_per_hour= 0;
211
    uc->user_resources=*mqh;
212
    uc->intime=thd->thr_create_time;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
213
    if (my_hash_insert(&hash_user_connections, (byte*) uc))
214 215
    {
      my_free((char*) uc,0);
216
      net_send_error(thd, 0, NullS);		// Out of memory
217 218 219 220 221
      return_val=1;
      goto end;
    }
  }
  thd->user_connect=uc;
222
  uc->connections++;
223 224 225
end:
  (void) pthread_mutex_unlock(&LOCK_user_conn);
  return return_val;
peter@mysql.com's avatar
peter@mysql.com committed
226

227
}
228 229 230


/*
231
    Check if user exist and password supplied is correct. 
232 233
  SYNOPSIS
    check_user()
234 235 236 237
    thd          thread handle, thd->{host,user,ip} are used
    command      originator of the check: now check_user is called
                 during connect and change user procedures; used for 
                 logging.
238
    passwd       scrambled password received from client
239 240 241 242
    passwd_len   length of scrambled password
    db           database name to connect to, may be NULL
    check_count  dont know exactly

243
    Note, that host, user and passwd may point to communication buffer.
244
    Current implementation does not depend on that, but future changes
245 246 247
    should be done with this in mind; 'thd' is INOUT, all other params
    are 'IN'.

248 249 250
  RETURN VALUE
    0  OK; thd->user, thd->master_access, thd->priv_user, thd->db and
       thd->db_access are updated; OK is sent to client;
251 252
   -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
253 254
*/

hf@deer.(none)'s avatar
hf@deer.(none) committed
255 256 257
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
258
{
259
  DBUG_ENTER("check_user");
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
260
  
monty@mysql.com's avatar
monty@mysql.com committed
261 262
#ifdef NO_EMBEDDED_ACCESS_CHECKS
  thd->master_access= GLOBAL_ACLS;			// Full rights
263
  /* Change database if necessary */
264 265 266 267 268 269
  if (db && db[0])
  {
    thd->db= 0;
    thd->db_length= 0;
    if (mysql_change_db(thd, db))
    {
270 271
      /* Send the error to the client */
      net_send_error(thd);
272 273 274 275 276 277 278 279
      if (thd->user_connect)
	decrease_user_connections(thd->user_connect);
      DBUG_RETURN(-1);
    }
  }
  else
    send_ok(thd);
  DBUG_RETURN(0);
monty@mysql.com's avatar
monty@mysql.com committed
280 281
#else

282 283 284 285 286
  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);
  
287
  /*
288 289
    If the server is running in secure auth mode, short scrambles are 
    forbidden.
290
  */
291
  if (opt_secure_auth_local && passwd_len == SCRAMBLE_LENGTH_323)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
292
  {
293
    net_printf_error(thd, ER_NOT_SUPPORTED_AUTH_MODE);
294 295
    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
296
  }
297 298 299 300
  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
301

302
  /*
303
    Clear thd->db as it points to something, that will be freed when 
304
    connection is closed. We don't want to accidentally free a wrong pointer
305 306
    if connect failed. Also in case of 'CHANGE USER' failure, current
    database will be switched to 'no database selected'.
307
  */
308 309
  thd->db= 0;
  thd->db_length= 0;
310
  
311
  USER_RESOURCES ur;
312
  int res= acl_getroot(thd, &ur, passwd, passwd_len);
hf@deer.(none)'s avatar
hf@deer.(none) committed
313
#ifndef EMBEDDED_LIBRARY
314
  if (res == -1)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
315
  {
316 317 318 319 320 321
    /*
      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.
    */
322
    NET *net= &thd->net;
323
    if (opt_secure_auth_local)
324
    {
325 326
      net_printf_error(thd, ER_SERVER_IS_IN_SECURE_AUTH_MODE,
                       thd->user, thd->host_or_ip);
327 328 329 330
      mysql_log.write(thd, COM_CONNECT, ER(ER_SERVER_IS_IN_SECURE_AUTH_MODE),
                      thd->user, thd->host_or_ip);
      DBUG_RETURN(-1);
    }
monty@mysql.com's avatar
monty@mysql.com committed
331
    /* We have to read very specific packet size */
332
    if (send_old_password_request(thd) ||
monty@mysql.com's avatar
monty@mysql.com committed
333 334
        my_net_read(net) != SCRAMBLE_LENGTH_323 + 1)
    {                                               
335 336 337 338 339
      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 */
340
    res= acl_getroot(thd, &ur, (char *) net->read_pos, SCRAMBLE_LENGTH_323);
341
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
342
#endif /*EMBEDDED_LIBRARY*/
343 344
  /* here res is always >= 0 */
  if (res == 0)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
345
  {
346
    if (!(thd->master_access & NO_ACCESS)) // authentication is OK 
347
    {
348 349 350 351 352 353 354 355 356 357
      DBUG_PRINT("info",
                 ("Capabilities: %d  packet_length: %ld  Host: '%s'  "
                  "Login user: '%s' Priv_user: '%s'  Using password: %s "
                  "Access: %u  db: '%s'",
                  thd->client_capabilities, thd->max_client_packet_length,
                  thd->host_or_ip, thd->user, thd->priv_user,
                  passwd_len ? "yes": "no",
                  thd->master_access, thd->db ? thd->db : "*none*"));

      if (check_count)
358
      {
359
        VOID(pthread_mutex_lock(&LOCK_thread_count));
serg@serg.mylan's avatar
serg@serg.mylan committed
360
        bool count_ok= thread_count <= max_connections + delayed_insert_threads
361
                       || (thd->master_access & SUPER_ACL);
362 363
        VOID(pthread_mutex_unlock(&LOCK_thread_count));
        if (!count_ok)
serg@serg.mylan's avatar
serg@serg.mylan committed
364
        {                                         // too many connections
365
          net_send_error(thd, ER_CON_COUNT_ERROR);
366 367
          DBUG_RETURN(-1);
        }
368
      }
peter@mysql.com's avatar
peter@mysql.com committed
369

370 371 372 373 374 375 376 377
      /* Why logging is performed before all checks've passed? */
      mysql_log.write(thd,command,
                      (thd->priv_user == thd->user ?
                       (char*) "%s@%s on %s" :
                       (char*) "%s@%s as anonymous on %s"),
                      thd->user, thd->host_or_ip,
                      db ? db : (char*) "");

378
      /*
379 380 381
        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.
382
      */
383 384 385
      thd->db_access=0;

      /* Don't allow user to connect if he has done too many queries */
386
      if ((ur.questions || ur.updates || ur.conn_per_hour || ur.user_conn ||
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
387
	   max_user_connections) &&
388 389 390 391
	  get_or_create_user_conn(thd,
            opt_old_style_user_limits ? thd->user : thd->priv_user,
            opt_old_style_user_limits ? thd->host_or_ip : thd->priv_host,
            &ur))
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
392 393
	DBUG_RETURN(-1);
      if (thd->user_connect &&
394 395
	  (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
396 397 398
	   max_user_connections) &&
	  check_for_max_user_connections(thd, thd->user_connect))
	DBUG_RETURN(-1);
399

400
      /* Change database if necessary */
401
      if (db && db[0])
402
      {
403 404
        if (mysql_change_db(thd, db))
        {
405 406
          /* Send error to the client */
          net_send_error(thd);
407 408 409 410
          if (thd->user_connect)
            decrease_user_connections(thd->user_connect);
          DBUG_RETURN(-1);
        }
411 412
      }
      else
monty@mysql.com's avatar
monty@mysql.com committed
413
	send_ok(thd);
414 415 416
      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
417 418
    }
  }
419
  else if (res == 2) // client gave short hash, server has long hash
420
  {
421
    net_printf_error(thd, ER_NOT_SUPPORTED_AUTH_MODE);
422 423
    mysql_log.write(thd,COM_CONNECT,ER(ER_NOT_SUPPORTED_AUTH_MODE));
    DBUG_RETURN(-1);
424
  }
425 426 427 428
  net_printf_error(thd, ER_ACCESS_DENIED_ERROR,
                   thd->user,
                   thd->host_or_ip,
                   passwd_len ? ER(ER_YES) : ER(ER_NO));
429 430 431 432 433
  mysql_log.write(thd, COM_CONNECT, ER(ER_ACCESS_DENIED_ERROR),
                  thd->user,
                  thd->host_or_ip,
                  passwd_len ? ER(ER_YES) : ER(ER_NO));
  DBUG_RETURN(-1);
monty@mysql.com's avatar
monty@mysql.com committed
434
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
435 436
}

437
/*
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
438 439
  Check for maximum allowable user connections, if the mysqld server is
  started with corresponding variable that is greater then 0.
440 441
*/

442 443
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
444 445 446 447 448
{
  *length=buff->len;
  return (byte*) buff->user;
}

449
extern "C" void free_user(struct user_conn *uc)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
450 451 452 453
{
  my_free((char*) uc,MYF(0));
}

peter@mysql.com's avatar
peter@mysql.com committed
454
void init_max_user_conn(void)
455
{
456 457
  (void) hash_init(&hash_user_connections,system_charset_info,max_connections,
		   0,0,
458
		   (hash_get_key) get_key_conn, (hash_free_key) free_user,
459
		   0);
460 461 462
}


monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
/*
  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
*/

480 481
#ifndef NO_EMBEDDED_ACCESS_CHECKS

482
static int check_for_max_user_connections(THD *thd, USER_CONN *uc)
483
{
484
  int error=0;
485
  DBUG_ENTER("check_for_max_user_connections");
peter@mysql.com's avatar
peter@mysql.com committed
486

487
  (void) pthread_mutex_lock(&LOCK_user_conn);
488
  if (max_user_connections && !uc->user_resources.user_conn &&
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
489
      max_user_connections < (uint) uc->connections)
490
  {
491
    net_printf_error(thd, ER_TOO_MANY_USER_CONNECTIONS, uc->user);
492 493
    error=1;
    goto end;
494
  }
495
  time_out_user_resource_limits(thd, uc);
496 497 498 499 500 501 502 503 504 505 506
  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)
507
  {
508
    net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user,
jimw@mysql.com's avatar
jimw@mysql.com committed
509
                     "max_connections_per_hour",
510
                     (long) uc->user_resources.conn_per_hour);
511 512 513
    error=1;
    goto end;
  }
514
  uc->conn_per_hour++;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
515 516

  end:
517 518
  if (error)
    uc->connections--; // no need for decrease_user_connections() here
519
  (void) pthread_mutex_unlock(&LOCK_user_conn);
520
  DBUG_RETURN(error);
521
}
522
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
523

monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
/*
  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.
*/

542
static void decrease_user_connections(USER_CONN *uc)
543
{
544
  DBUG_ENTER("decrease_user_connections");
545 546 547
  (void) pthread_mutex_lock(&LOCK_user_conn);
  DBUG_ASSERT(uc->connections);
  if (!--uc->connections && !mqh_used)
548 549
  {
    /* Last connection for user; Delete it */
550
    (void) hash_delete(&hash_user_connections,(byte*) uc);
551
  }
552
  (void) pthread_mutex_unlock(&LOCK_user_conn);
553
  DBUG_VOID_RETURN;
554 555
}

556

557 558 559 560 561
void free_max_user_conn(void)
{
  hash_free(&hash_user_connections);
}

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
562

563 564 565
/*
  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
566 567 568

  sql_command is actually set to SQLCOM_END sometimes
  so we need the +1 to include it in the array.
569 570 571 572 573 574

  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
575 576
*/

kent@mysql.com's avatar
kent@mysql.com committed
577
char  uc_update_queries[SQLCOM_END+1];
578 579 580

void init_update_queries(void)
{
kent@mysql.com's avatar
kent@mysql.com committed
581 582
  bzero((gptr) &uc_update_queries, sizeof(uc_update_queries));

583 584 585
  uc_update_queries[SQLCOM_CREATE_TABLE]=1;
  uc_update_queries[SQLCOM_CREATE_INDEX]=1;
  uc_update_queries[SQLCOM_ALTER_TABLE]=1;
586 587 588 589 590 591
  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;
592 593 594 595 596
  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;
597 598
  uc_update_queries[SQLCOM_REPLACE]=2;
  uc_update_queries[SQLCOM_REPLACE_SELECT]=2;
599 600 601 602
  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
603 604
  uc_update_queries[SQLCOM_CREATE_VIEW]=1;
  uc_update_queries[SQLCOM_DROP_VIEW]=1;
605 606
}

607 608
bool is_update_query(enum enum_sql_command command)
{
kent@mysql.com's avatar
kent@mysql.com committed
609
  DBUG_ASSERT(command >= 0 && command <= SQLCOM_END);
610 611
  return uc_update_queries[command];
}
612

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
613
/*
614 615
  Reset per-hour user resource limits when it has been more than
  an hour since they were last checked
616

617 618 619 620
  SYNOPSIS:
    time_out_user_resource_limits()
    thd			Thread handler
    uc			User connection details
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
621

622 623 624 625
  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.
*/
626

627
static void time_out_user_resource_limits(THD *thd, USER_CONN *uc)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
628
{
629
  time_t check_time = thd->start_time ?  thd->start_time : time(NULL);
630
  DBUG_ENTER("time_out_user_resource_limits");
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
631

632
  /* If more than a hour since last check, reset resource checking */
633 634 635 636 637 638 639
  if (check_time  - uc->intime >= 3600)
  {
    uc->questions=1;
    uc->updates=0;
    uc->conn_per_hour=0;
    uc->intime=check_time;
  }
640 641 642 643 644 645 646 647 648 649 650 651

  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)
{
652 653
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  bool error= 0;
654 655 656 657 658 659 660 661 662
  time_t check_time = thd->start_time ?  thd->start_time : time(NULL);
  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);

663
  /* Check that we have not done too many questions / hour */
664 665 666
  if (uc->user_resources.questions &&
      uc->questions++ >= uc->user_resources.questions)
  {
667 668
    net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user, "max_questions",
                     (long) uc->user_resources.questions);
669 670 671
    error=1;
    goto end;
  }
672
  if (check_command < (uint) SQLCOM_END)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
673
  {
674 675 676 677
    /* 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)
    {
678 679
      net_printf_error(thd, ER_USER_LIMIT_REACHED, uc->user, "max_updates",
                       (long) uc->user_resources.updates);
680 681 682
      error=1;
      goto end;
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
683 684
  }
end:
685
  (void) pthread_mutex_unlock(&LOCK_user_conn);
686
  DBUG_RETURN(error);
687 688
#else
  return (0);
monty@mysql.com's avatar
monty@mysql.com committed
689
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
690 691
}

692

monty@mysql.com's avatar
monty@mysql.com committed
693
static void reset_mqh(LEX_USER *lu, bool get_them= 0)
694
{
monty@mysql.com's avatar
monty@mysql.com committed
695
#ifndef NO_EMBEDDED_ACCESS_CHECKS
696
  (void) pthread_mutex_lock(&LOCK_user_conn);
peter@mysql.com's avatar
peter@mysql.com committed
697
  if (lu)  // for GRANT
698
  {
699
    USER_CONN *uc;
700
    uint temp_len=lu->user.length+lu->host.length+2;
701 702
    char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];

703 704
    memcpy(temp_user,lu->user.str,lu->user.length);
    memcpy(temp_user+lu->user.length+1,lu->host.str,lu->host.length);
705
    temp_user[lu->user.length]='\0'; temp_user[temp_len-1]=0;
706
    if ((uc = (struct  user_conn *) hash_search(&hash_user_connections,
707
						(byte*) temp_user, temp_len)))
708 709
    {
      uc->questions=0;
710
      get_mqh(temp_user,&temp_user[lu->user.length+1],uc);
711 712
      uc->updates=0;
      uc->conn_per_hour=0;
713 714
    }
  }
monty@mysql.com's avatar
monty@mysql.com committed
715
  else
716
  {
monty@mysql.com's avatar
monty@mysql.com committed
717
    /* for FLUSH PRIVILEGES and FLUSH USER_RESOURCES */
718
    for (uint idx=0;idx < hash_user_connections.records; idx++)
719
    {
monty@mysql.com's avatar
monty@mysql.com committed
720 721
      USER_CONN *uc=(struct user_conn *) hash_element(&hash_user_connections,
						      idx);
722 723 724 725 726
      if (get_them)
	get_mqh(uc->user,uc->host,uc);
      uc->questions=0;
      uc->updates=0;
      uc->conn_per_hour=0;
727 728
    }
  }
729
  (void) pthread_mutex_unlock(&LOCK_user_conn);
monty@mysql.com's avatar
monty@mysql.com committed
730
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
731
}
732

bk@work.mysql.com's avatar
bk@work.mysql.com committed
733
/*
734
    Perform handshake, authorize client and update thd ACL variables.
735
  SYNOPSIS
736
    check_connection()
737
    thd  thread handle
738 739

  RETURN
740
     0  success, OK is sent to user, thd is updated.
741 742
    -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
743 744
*/

hf@deer.(none)'s avatar
hf@deer.(none) committed
745 746
#ifndef EMBEDDED_LIBRARY
static int check_connection(THD *thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
747
{
748
  uint connect_errors= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
749
  NET *net= &thd->net;
monty@mysql.com's avatar
monty@mysql.com committed
750 751
  ulong pkt_len= 0;
  char *end;
752

753 754 755
  DBUG_PRINT("info",
             ("New connection received on %s", vio_description(net->vio)));

bk@work.mysql.com's avatar
bk@work.mysql.com committed
756 757
  if (!thd->host)                           // If TCP/IP connection
  {
758
    char ip[30];
759

760
    if (vio_peer_addr(net->vio, ip, &thd->peer_port))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
761
      return (ER_BAD_HOST_ERROR);
762
    if (!(thd->ip= my_strdup(ip,MYF(0))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
763
      return (ER_OUT_OF_RESOURCES);
764
    thd->host_or_ip= thd->ip;
monty@mysql.com's avatar
monty@mysql.com committed
765
    vio_in_addr(net->vio,&thd->remote.sin_addr);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
766 767 768
#if !defined(HAVE_SYS_UN_H) || defined(HAVE_mit_thread)
    /* Fast local hostname resolve for Win32 */
    if (!strcmp(thd->ip,"127.0.0.1"))
769
    {
hf@deer.(none)'s avatar
hf@deer.(none) committed
770 771
      thd->host= (char*) my_localhost;
      thd->host_or_ip= my_localhost;
772
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
773 774 775
    else
#endif
    {
776 777 778 779 780 781
      if (!(specialflag & SPECIAL_NO_RESOLVE))
      {
	vio_in_addr(net->vio,&thd->remote.sin_addr);
	thd->host=ip_to_hostname(&thd->remote.sin_addr,&connect_errors);
	/* Cut very long hostnames to avoid possible overflows */
	if (thd->host)
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
782
	{
783
	  thd->host[min(strlen(thd->host), HOSTNAME_LENGTH)]= 0;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
784 785
	  thd->host_or_ip= thd->host;
	}
786 787 788
	if (connect_errors > max_connect_errors)
	  return(ER_HOST_IS_BLOCKED);
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
789
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
790 791 792
    DBUG_PRINT("info",("Host: %s  ip: %s",
		       thd->host ? thd->host : "unknown host",
		       thd->ip ? thd->ip : "unknown ip"));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
793 794 795
    if (acl_check_host(thd->host,thd->ip))
      return(ER_HOST_NOT_PRIVILEGED);
  }
796
  else /* Hostname given means that the connection was on a socket */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
797
  {
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
798
    DBUG_PRINT("info",("Host: %s",thd->host));
799 800
    thd->host_or_ip= thd->host;
    thd->ip= 0;
801 802
    /* Reset sin_addr */
    bzero((char*) &thd->remote, sizeof(thd->remote));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
803 804 805
  }
  vio_keepalive(net->vio, TRUE);
  {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
806
    /* buff[] needs to big enough to hold the server_version variable */
807
    char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH + 64];
808 809
    ulong client_flags = (CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB |
			  CLIENT_PROTOCOL_41 | CLIENT_SECURE_CONNECTION);
810

811 812 813 814 815
    if (opt_using_transactions)
      client_flags|=CLIENT_TRANSACTIONS;
#ifdef HAVE_COMPRESS
    client_flags |= CLIENT_COMPRESS;
#endif /* HAVE_COMPRESS */
816 817
#ifdef HAVE_OPENSSL
    if (ssl_acceptor_fd)
818
      client_flags |= CLIENT_SSL;       /* Wow, SSL is available! */
819
#endif /* HAVE_OPENSSL */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
820

821 822 823 824 825 826 827 828 829 830 831
    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
832
      tail: that's why first part of the scramble is placed here, and second
833 834
      part at the end of packet.
    */
835
    end= strmake(end, thd->scramble, SCRAMBLE_LENGTH_323) + 1;
836 837 838
   
    int2store(end, client_flags);
    /* write server characteristics: up to 16 bytes allowed */
839
    end[2]=(char) default_charset_info->number;
840 841 842 843 844 845 846 847 848
    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
849
			  (uint) (end-buff)) ||
850
	(pkt_len= my_net_read(net)) == packet_error ||
bk@work.mysql.com's avatar
bk@work.mysql.com committed
851 852 853 854 855 856 857 858 859 860 861
	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);
862
  if (thd->packet.alloc(thd->variables.net_buffer_length))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
863 864 865
    return(ER_OUT_OF_RESOURCES);

  thd->client_capabilities=uint2korr(net->read_pos);
866 867 868 869
  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
870 871 872 873 874 875 876
    DBUG_PRINT("info", ("client_character_set: %d", (uint) net->read_pos[8]));
    /*
      Use server character set and collation if
      - client has not specified a character set
      - client character set is the same as the servers
      - client character set doesn't exists in server
    */
877
    if (!(thd->variables.character_set_client=
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
878 879 880 881
	  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))
882
    {
883 884
      thd->variables.character_set_client=
	global_system_variables.character_set_client;
885 886
      thd->variables.collation_connection=
	global_system_variables.collation_connection;
887 888
      thd->variables.character_set_results=
	global_system_variables.character_set_results;
889 890 891
    }
    else
    {
892
      thd->variables.character_set_results=
893 894 895
      thd->variables.collation_connection= 
	thd->variables.character_set_client;
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
896
    thd->update_charset();
897
    end= (char*) net->read_pos+32;
898 899 900 901 902 903 904
  }
  else
  {
    thd->max_client_packet_length= uint3korr(net->read_pos+2);
    end= (char*) net->read_pos+5;
  }

905
  if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
906
    thd->variables.sql_mode|= MODE_IGNORE_SPACE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
907
#ifdef HAVE_OPENSSL
908
  DBUG_PRINT("info", ("client capabilities: %d", thd->client_capabilities));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
909 910 911
  if (thd->client_capabilities & CLIENT_SSL)
  {
    /* Do the SSL layering. */
912 913 914 915 916
    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
917
    DBUG_PRINT("info", ("IO layer change in progress..."));
918 919 920 921 922
    if (sslaccept(ssl_acceptor_fd, net->vio, thd->variables.net_wait_timeout))
    {
      DBUG_PRINT("error", ("Failed to read user information (pkt_len= %lu)",
			   pkt_len));
      inc_host_errors(&thd->remote.sin_addr);
peter@mysql.com's avatar
peter@mysql.com committed
923
      return(ER_HANDSHAKE_ERROR);
924
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
925
    DBUG_PRINT("info", ("Reading user information over SSL layer"));
926
    if ((pkt_len= my_net_read(net)) == packet_error ||
bk@work.mysql.com's avatar
bk@work.mysql.com committed
927 928
	pkt_len < NORMAL_HANDSHAKE_SIZE)
    {
929 930
      DBUG_PRINT("error", ("Failed to read user information (pkt_len= %lu)",
			   pkt_len));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
931 932 933 934
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
  }
935 936 937
#endif

  if (end >= (char*) net->read_pos+ pkt_len +2)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
938
  {
939 940
    inc_host_errors(&thd->remote.sin_addr);
    return(ER_HANDSHAKE_ERROR);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
941 942 943
  }

  if (thd->client_capabilities & CLIENT_INTERACTIVE)
944
    thd->variables.net_wait_timeout= thd->variables.net_interactive_timeout;
945
  if ((thd->client_capabilities & CLIENT_TRANSACTIONS) &&
946 947
      opt_using_transactions)
    net->return_status= &thd->server_status;
948
  net->read_timeout=(uint) thd->variables.net_read_timeout;
peter@mysql.com's avatar
peter@mysql.com committed
949

950 951
  char *user= end;
  char *passwd= strend(user)+1;
952
  char *db= passwd;
953
  char db_buff[NAME_LEN+1];                     // buffer to store db in utf8
954
  char user_buff[USERNAME_LENGTH+1];		// buffer to store user in utf8
955 956 957
  uint dummy_errors;

  /*
958 959 960 961
    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'.
  */
962
  uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ?
963 964 965
    *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
966

kostja@oak.local's avatar
kostja@oak.local committed
967 968
  /* Since 4.1 all database names are stored in utf8 */
  if (db)
peter@mysql.com's avatar
peter@mysql.com committed
969
  {
970 971 972
    db_buff[copy_and_convert(db_buff, sizeof(db_buff)-1,
                             system_charset_info,
                             db, strlen(db),
973
                             thd->charset(), &dummy_errors)]= 0;
974
    db= db_buff;
kostja@oak.local's avatar
kostja@oak.local committed
975
  }
peter@mysql.com's avatar
peter@mysql.com committed
976

977 978 979 980
  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;
981

982 983
  if (thd->user)
    x_free(thd->user);
984 985
  if (!(thd->user= my_strdup(user, MYF(0))))
    return (ER_OUT_OF_RESOURCES);
986
  return check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
987 988
}

989

990 991
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
992 993 994 995
{
  Vio* save_vio;
  ulong save_client_capabilities;

996 997 998 999 1000 1001 1002 1003 1004
  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
1005 1006
  save_client_capabilities= thd->client_capabilities;
  thd->client_capabilities|= CLIENT_MULTI_QUERIES;
1007 1008 1009 1010
  /*
    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
1011 1012
  save_vio= thd->net.vio;
  thd->net.vio= 0;
1013
  thd->net.no_send_error= 0;
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1014
  dispatch_command(COM_QUERY, thd, thd->query, thd->query_length+1);
1015
  rw_unlock(var_mutex);
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1016 1017 1018 1019 1020
  thd->client_capabilities= save_client_capabilities;
  thd->net.vio= save_vio;
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
1021 1022 1023 1024
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
1025
    (uint) ((thd->thr_create_time = time(NULL)) - thd->connect_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1026 1027 1028 1029 1030
  if (launch_time >= slow_launch_time)
    statistic_increment(slow_launch_threads,&LOCK_status );

  pthread_detach_this_thread();

1031
#if !defined( __WIN__) && !defined(OS2)	// Win32 calls this in pthread_create
monty@mysql.com's avatar
monty@mysql.com committed
1032
  /* The following calls needs to be done before we call DBUG_ macros */
1033
  if (!(test_flags & TEST_NO_THREADS) & my_thread_init())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1034
  {
1035
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
1036
    statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1037 1038 1039 1040 1041
    end_thread(thd,0);
    return 0;
  }
#endif

1042 1043 1044 1045 1046 1047 1048
  /*
    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
1049 1050
  DBUG_PRINT("info", ("handle_one_connection called by thread %d\n",
		      thd->thread_id));
monty@mysql.com's avatar
monty@mysql.com committed
1051
  /* 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
1052

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1053
#if defined(__WIN__)
1054
  init_signals();
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1055
#elif !defined(OS2) && !defined(__NETWARE__)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1056 1057 1058 1059 1060 1061
  sigset_t set;
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
  if (thd->store_globals())
  {
1062
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
1063
    statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1064 1065 1066 1067 1068 1069 1070 1071 1072
    end_thread(thd,0);
    return 0;
  }

  do
  {
    int error;
    NET *net= &thd->net;
    thd->thread_stack= (char*) &thd;
1073
    net->no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1074

1075
    if ((error=check_connection(thd)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1076 1077
    {						// Wrong permissions
      if (error > 0)
1078
	net_printf_error(thd, error, thd->host_or_ip);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1079 1080
#ifdef __NT__
      if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
1081
	my_sleep(1000);				/* must wait after eof() */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1082
#endif
1083
      statistic_increment(aborted_connects,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1084 1085
      goto end_thread;
    }
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1086 1087 1088
#ifdef __NETWARE__
    netware_reg_user(thd->ip, thd->user, "MySQL");
#endif
1089
    if (thd->variables.max_join_size == HA_POS_ERROR)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1090 1091 1092 1093
      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
1094
    thd->version= refresh_version;
1095
    thd->proc_info= 0;
1096
    thd->command= COM_SLEEP;
1097 1098
    thd->set_time();
    thd->init_for_queries();
monty@mysql.com's avatar
monty@mysql.com committed
1099

1100
    if (sys_init_connect.value_length && !(thd->master_access & SUPER_ACL))
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1101
    {
1102 1103
      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
1104
	thd->killed= THD::KILL_CONNECTION;
gluh@gluh.mysql.r18.ru's avatar
gluh@gluh.mysql.r18.ru committed
1105 1106 1107
    }

    thd->proc_info=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1108
    thd->set_time();
1109
    thd->init_for_queries();
1110 1111
    while (!net->error && net->vio != 0 &&
           !(thd->killed == THD::KILL_CONNECTION))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1112
    {
1113
      net->no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1114 1115 1116
      if (do_command(thd))
	break;
    }
1117 1118
    if (thd->user_connect)
      decrease_user_connections(thd->user_connect);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1119
    if (net->error && net->vio != 0 && net->report_error)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1120
    {
1121
      if (!thd->killed && thd->variables.log_warnings > 1)
monty@mysql.com's avatar
monty@mysql.com committed
1122
	sql_print_warning(ER(ER_NEW_ABORTING_CONNECTION),
serg@serg.mylan's avatar
serg@serg.mylan committed
1123 1124 1125 1126 1127
                          thd->thread_id,(thd->db ? thd->db : "unconnected"),
                          thd->user ? thd->user : "unauthenticated",
                          thd->host_or_ip,
                          (net->last_errno ? ER(net->last_errno) :
                           ER(ER_UNKNOWN_ERROR)));
1128
      net_send_error(thd, net->last_errno, NullS);
1129
      statistic_increment(aborted_threads,&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1130
    }
1131 1132 1133 1134
    else if (thd->killed)
    {
      statistic_increment(aborted_threads,&LOCK_status);
    }
1135
    
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1136
end_thread:
1137
    close_connection(thd, 0, 1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
    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
1149 1150
#endif /* EMBEDDED_LIBRARY */

1151 1152 1153 1154
/*
  Execute commands from bootstrap_file.
  Used when creating the initial grant tables
*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1155

1156
extern "C" pthread_handler_decl(handle_bootstrap,arg)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1157
{
1158 1159 1160
  THD *thd=(THD*) arg;
  FILE *file=bootstrap_file;
  char *buff;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1161

1162
  /* The following must be called before DBUG_ENTER */
1163
  if (my_thread_init() || thd->store_globals())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1164
  {
hf@deer.(none)'s avatar
hf@deer.(none) committed
1165
#ifndef EMBEDDED_LIBRARY
1166
    close_connection(thd, ER_OUT_OF_RESOURCES, 1);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1167
#endif
1168
    thd->fatal_error();
1169
    goto end;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1170
  }
1171 1172
  DBUG_ENTER("handle_bootstrap");

hf@deer.(none)'s avatar
hf@deer.(none) committed
1173
#ifndef EMBEDDED_LIBRARY
1174 1175
  pthread_detach_this_thread();
  thd->thread_stack= (char*) &thd;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1176
#if !defined(__WIN__) && !defined(OS2) && !defined(__NETWARE__)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1177
  sigset_t set;
1178 1179
  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
1180
#endif
hf@deer.(none)'s avatar
hf@deer.(none) committed
1181
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1182

1183
  if (thd->variables.max_join_size == HA_POS_ERROR)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1184 1185 1186 1187
    thd->options |= OPTION_BIG_SELECTS;

  thd->proc_info=0;
  thd->version=refresh_version;
1188
  thd->priv_user=thd->user=(char*) my_strdup("boot", MYF(MY_WME));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1189

1190
  buff= (char*) thd->net.buff;
1191
  thd->init_for_queries();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1192 1193
  while (fgets(buff, thd->net.max_packet, file))
  {
monty@mishka.local's avatar
monty@mishka.local committed
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
   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;

1214
    while (length && (my_isspace(thd->charset(), buff[length-1]) ||
1215
           buff[length-1] == ';'))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1216 1217
      length--;
    buff[length]=0;
1218
    thd->query_length=length;
1219 1220
    thd->query= thd->memdup_w_gap(buff, length+1, thd->db_length+1);
    thd->query[length] = '\0';
1221 1222 1223 1224
    /*
      We don't need to obtain LOCK_thread_count here because in bootstrap
      mode we have only one thread.
    */
1225
    thd->query_id=next_query_id();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1226 1227
    mysql_parse(thd,thd->query,length);
    close_thread_tables(thd);			// Free tables
1228
    if (thd->is_fatal_error)
1229
      break;
1230
    free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC));
1231
#ifdef USING_TRANSACTIONS
1232
    free_root(&thd->transaction.mem_root,MYF(MY_KEEP_PREALLOC));
1233
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1234
  }
1235 1236 1237

  /* thd->fatal_error should be set in case something went wrong */
end:
1238 1239 1240 1241 1242 1243
  bootstrap_error= thd->is_fatal_error;

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

hf@deer.(none)'s avatar
hf@deer.(none) committed
1244
#ifndef EMBEDDED_LIBRARY
1245 1246 1247
  (void) pthread_mutex_lock(&LOCK_thread_count);
  thread_count--;
  (void) pthread_mutex_unlock(&LOCK_thread_count);
1248
  (void) pthread_cond_broadcast(&COND_thread_count);
1249 1250
  my_thread_end();
  pthread_exit(0);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1251
#endif
1252
  DBUG_RETURN(0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1253 1254
}

1255
    /* This works because items are allocated with sql_alloc() */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1256

1257
void free_items(Item *item)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1258
{
1259
  Item *next;
monty@mysql.com's avatar
monty@mysql.com committed
1260
  DBUG_ENTER("free_items");
1261 1262 1263
  for (; item ; item=next)
  {
    next=item->next;
1264
    item->delete_self();
1265
  }
monty@mysql.com's avatar
monty@mysql.com committed
1266
  DBUG_VOID_RETURN;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1267 1268
}

1269 1270 1271 1272
    /* This works because items are allocated with sql_alloc() */

void cleanup_items(Item *item)
{
monty@mysql.com's avatar
monty@mysql.com committed
1273
  DBUG_ENTER("cleanup_items");  
1274 1275
  for (; item ; item=item->next)
    item->cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
1276
  DBUG_VOID_RETURN;
1277 1278
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1279 1280 1281 1282 1283 1284 1285
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;
1286
  if (!(table_list = (TABLE_LIST*) thd->calloc(sizeof(TABLE_LIST))))
1287
    DBUG_RETURN(1); // out of memory
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
1288
  table_list->db= db;
1289
  table_list->table_name= table_list->alias= tbl_name;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
1290 1291
  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
1292

1293 1294
  if (!db || check_db_name(db))
  {
1295
    my_error(ER_WRONG_DB_NAME ,MYF(0), db ? db : "NULL");
1296 1297
    goto err;
  }
1298
  if (lower_case_table_names)
1299
    my_casedn_str(files_charset_info, tbl_name);
1300
  remove_escape(table_list->table_name);
1301 1302 1303 1304

  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
1305
  if (check_one_table_access(thd, SELECT_ACL, table_list))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1306 1307
    goto err;
  thd->free_list = 0;
1308
  thd->query_length=(uint) strlen(tbl_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1309
  thd->query = tbl_name;
1310
  if ((error = mysqld_dump_create_info(thd, table_list, -1)))
1311
  {
1312
    my_error(ER_GET_ERRNO, MYF(0), my_errno);
1313 1314
    goto err;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1315
  net_flush(&thd->net);
1316
  if ((error= table->file->dump(thd,fd)))
1317
    my_error(ER_GET_ERRNO, MYF(0), error);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1318

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1319
err:
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1320
  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1321 1322
}

1323 1324 1325 1326
/*
  Ends the current transaction and (maybe) begin the next

  SYNOPSIS
1327
    end_trans()
1328 1329 1330 1331 1332 1333 1334
      thd            Current thread
      completion     Completion type

  RETURN
    0 - OK
*/

1335
int end_trans(THD *thd, enum enum_mysql_completiontype completion)
1336 1337 1338
{
  bool do_release= 0;
  int res= 0;
1339
  DBUG_ENTER("end_trans");
1340 1341 1342 1343 1344 1345 1346 1347 1348

  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;
1349
    res= ha_commit(thd);
1350
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
1351 1352
    break;
  case COMMIT_RELEASE:
serg@serg.mylan's avatar
serg@serg.mylan committed
1353
    do_release= 1; /* fall through */
1354 1355 1356 1357 1358 1359
  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
1360
    do_release= 1; /* fall through */
1361 1362 1363 1364
  case ROLLBACK:
  case ROLLBACK_AND_CHAIN:
  {
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
serg@serg.mylan's avatar
serg@serg.mylan committed
1365
    if (ha_rollback(thd))
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376
      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
1377

1378 1379 1380
  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
1381 1382
    thd->killed= THD::KILL_CONNECTION;

1383 1384
  DBUG_RETURN(res);
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1385

1386
#ifndef EMBEDDED_LIBRARY
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397

/*
  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
1398 1399 1400
bool do_command(THD *thd)
{
  char *packet;
1401 1402
  uint old_timeout;
  ulong packet_length;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1403 1404 1405 1406 1407
  NET *net;
  enum enum_server_command command;
  DBUG_ENTER("do_command");

  net= &thd->net;
1408 1409 1410 1411
  /*
    indicator of uninitialized lex => normal flow of errors handling
    (see my_message_sql)
  */
1412
  thd->lex->current_select= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1413 1414

  packet=0;
1415
  old_timeout=net->read_timeout;
monty@mysql.com's avatar
monty@mysql.com committed
1416
  /* Wait max for 8 hours */
1417
  net->read_timeout=(uint) thd->variables.net_wait_timeout;
1418
  thd->clear_error();				// Clear error message
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1419 1420 1421 1422

  net_new_transaction(net);
  if ((packet_length=my_net_read(net)) == packet_error)
  {
1423 1424 1425 1426 1427
    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)
1428 1429
    {
      statistic_increment(aborted_threads,&LOCK_status);
1430
      DBUG_RETURN(TRUE);			// We have to close it.
1431
    }
1432
    net_send_error(thd, net->last_errno, NullS);
1433
    net->error= 0;
1434
    DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1435 1436 1437 1438 1439
  }
  else
  {
    packet=(char*) net->read_pos;
    command = (enum enum_server_command) (uchar) packet[0];
1440 1441
    if (command >= COM_END)
      command= COM_END;				// Wrong command
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1442 1443 1444
    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
1445
  }
1446
  net->read_timeout=old_timeout;		// restore it
1447 1448 1449 1450 1451 1452 1453 1454 1455
  /*
    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.
  */
1456
  DBUG_RETURN(dispatch_command(command,thd, packet+1, (uint) packet_length));
1457
}
1458
#endif  /* EMBEDDED_LIBRARY */
1459

1460

1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475
/*
   Perform one connection-level (COM_XXXX) command.
  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
*/
1476

1477 1478 1479 1480
bool dispatch_command(enum enum_server_command command, THD *thd,
		      char* packet, uint packet_length)
{
  NET *net= &thd->net;
1481
  bool error= 0;
1482 1483
  DBUG_ENTER("dispatch_command");

1484 1485 1486
  if (thd->killed == THD::KILL_QUERY || thd->killed == THD::KILL_BAD_DATA)
    thd->killed= THD::NOT_KILLED;

1487
  thd->command=command;
1488 1489 1490 1491
  /*
    Commands which will always take a long time should be marked with
    this so that they will not get logged to the slow query log
  */
1492
  thd->slow_command=FALSE;
1493
  thd->lex->sql_command= SQLCOM_END; /* to avoid confusing VIEW detectors */
1494
  thd->set_time();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1495 1496 1497
  VOID(pthread_mutex_lock(&LOCK_thread_count));
  thd->query_id=query_id;
  if (command != COM_STATISTICS && command != COM_PING)
1498
    next_query_id();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1499
  thread_running++;
1500
  /* TODO: set thd->lex->sql_command to SQLCOM_END here */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1501
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
1502

1503 1504
  thd->server_status&=
           ~(SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED);
1505
  switch (command) {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1506
  case COM_INIT_DB:
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1507 1508
  {
    LEX_STRING tmp;
1509 1510
    statistic_increment(thd->status_var.com_stat[SQLCOM_CHANGE_DB],
			&LOCK_status);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1511 1512 1513 1514 1515 1516
    thd->convert_string(&tmp, system_charset_info,
			packet, strlen(packet), thd->charset());
    if (!mysql_change_db(thd, tmp.str))
      mysql_log.write(thd,command,"%s",thd->db);
    break;
  }
1517
#ifdef HAVE_REPLICATION
1518 1519
  case COM_REGISTER_SLAVE:
  {
1520
    if (!register_slave(thd, (uchar*)packet, packet_length))
1521
      send_ok(thd);
1522 1523
    break;
  }
1524
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1525
  case COM_TABLE_DUMP:
1526 1527 1528 1529 1530
  {
    char *db, *tbl_name;
    uint db_len= *(uchar*) packet;
    uint tbl_len= *(uchar*) (packet + db_len + 1);

1531
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1532
    thd->slow_command= TRUE;
1533 1534 1535
    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);
1536
    mysql_table_dump(thd, db, tbl_name, -1);
1537 1538
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1539 1540
  case COM_CHANGE_USER:
  {
1541
    thd->change_user();
1542
    thd->clear_error();                         // if errors from rollback
1543

1544
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1545
    char *user= (char*) packet;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1546
    char *passwd= strend(user)+1;
1547 1548 1549 1550 1551
    /* 
      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).
    */
1552
    char db_buff[NAME_LEN+1];                 // buffer to store db in utf8 
1553 1554 1555 1556
    char *db= passwd;
    uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ? 
      *passwd++ : strlen(passwd);
    db+= passwd_len + 1;
1557
#ifndef EMBEDDED_LIBRARY
1558
    /* Small check for incoming packet */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1559
    if ((uint) ((uchar*) db - net->read_pos) > packet_length)
1560
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1561
      my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
1562 1563
      break;
    }
1564
#endif
1565
    /* Convert database name to utf8 */
1566
    uint dummy_errors;
1567 1568
    db_buff[copy_and_convert(db_buff, sizeof(db_buff)-1,
                             system_charset_info, db, strlen(db),
1569
                             thd->charset(), &dummy_errors)]= 0;
1570
    db= db_buff;
peter@mysql.com's avatar
peter@mysql.com committed
1571

1572 1573 1574 1575 1576 1577 1578
    /* Save user and privileges */
    uint save_master_access= thd->master_access;
    uint save_db_access= thd->db_access;
    uint save_db_length= thd->db_length;
    char *save_user= thd->user;
    char *save_priv_user= thd->priv_user;
    char *save_db= thd->db;
1579
    USER_CONN *save_user_connect= thd->user_connect;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
1580 1581
    
    if (!(thd->user= my_strdup(user, MYF(0))))
1582 1583
    {
      thd->user= save_user;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1584
      my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
1585 1586
      break;
    }
peter@mysql.com's avatar
peter@mysql.com committed
1587

1588 1589
    /* Clear variables that are allocated */
    thd->user_connect= 0;
monty@mysql.com's avatar
monty@mysql.com committed
1590
    int res= check_user(thd, COM_CHANGE_USER, passwd, passwd_len, db, FALSE);
peter@mysql.com's avatar
peter@mysql.com committed
1591

1592 1593
    if (res)
    {
1594
      /* authentication failure, we shall restore old user */
1595
      if (res > 0)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1596
        my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
1597 1598 1599
      x_free(thd->user);
      thd->user= save_user;
      thd->priv_user= save_priv_user;
1600
      thd->user_connect= save_user_connect;
1601 1602 1603 1604 1605 1606 1607 1608
      thd->master_access= save_master_access;
      thd->db_access= save_db_access;
      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
1609 1610
      if (save_user_connect)
	decrease_user_connections(save_user_connect);
1611 1612 1613
      x_free((gptr) save_db);
      x_free((gptr) save_user);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1614 1615
    break;
  }
1616 1617
  case COM_EXECUTE:
  {
1618
    mysql_stmt_execute(thd, packet, packet_length);
1619 1620
    break;
  }
1621 1622 1623 1624 1625
  case COM_FETCH:
  {
    mysql_stmt_fetch(thd, packet, packet_length);
    break;
  }
1626 1627
  case COM_LONG_DATA:
  {
1628
    mysql_stmt_get_longdata(thd, packet, packet_length);
1629 1630 1631 1632
    break;
  }
  case COM_PREPARE:
  {
monty@mysql.com's avatar
monty@mysql.com committed
1633
    mysql_stmt_prepare(thd, packet, packet_length, 0);
1634 1635
    break;
  }
1636 1637 1638 1639 1640
  case COM_CLOSE_STMT:
  {
    mysql_stmt_free(thd, packet);
    break;
  }
1641 1642 1643 1644 1645
  case COM_RESET_STMT:
  {
    mysql_stmt_reset(thd, packet);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1646 1647
  case COM_QUERY:
  {
1648 1649
    if (alloc_query(thd, packet, packet_length))
      break;					// fatal error is set
1650
    char *packet_end= thd->query + thd->query_length;
1651
    mysql_log.write(thd,command,"%s",thd->query);
1652
    DBUG_PRINT("query",("%-.4096s",thd->query));
1653
    mysql_parse(thd,thd->query, thd->query_length);
1654

1655
    while (!thd->killed && thd->lex->found_semicolon && !thd->net.report_error)
1656
    {
1657
      char *packet= thd->lex->found_semicolon;
1658
      net->no_send_error= 0;
1659
      /*
1660
        Multiple queries exits, execute them individually
1661
	in embedded server - just store them to be executed later 
1662
      */
1663
#ifndef EMBEDDED_LIBRARY
1664 1665
      if (thd->lock || thd->open_tables || thd->derived_tables ||
          thd->prelocked_mode)
1666
        close_thread_tables(thd);
1667
#endif
1668
      ulong length= (ulong)(packet_end-packet);
1669

1670 1671
      log_slow_query(thd);

1672
      /* Remove garbage at start of query */
1673
      while (my_isspace(thd->charset(), *packet) && length > 0)
1674 1675 1676 1677
      {
        packet++;
        length--;
      }
monty@mysql.com's avatar
monty@mysql.com committed
1678
      VOID(pthread_mutex_lock(&LOCK_thread_count));
1679
      thd->query_length= length;
1680
      thd->query= packet;
1681
      thd->query_id= next_query_id();
1682
      thd->set_time(); /* Reset the query start time. */
1683
      /* TODO: set thd->lex->sql_command to SQLCOM_END here */
1684
      VOID(pthread_mutex_unlock(&LOCK_thread_count));
1685
#ifndef EMBEDDED_LIBRARY
1686
      mysql_parse(thd, packet, length);
1687
#else
hf@deer.(none)'s avatar
hf@deer.(none) committed
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697
      /*
	'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
1698
	thd->query_rest.copy(packet, length, thd->query_rest.charset());
1699 1700 1701

      thd->server_status&= ~ (SERVER_QUERY_NO_INDEX_USED |
                              SERVER_QUERY_NO_GOOD_INDEX_USED);
1702 1703
      break;
#endif /*EMBEDDED_LIBRARY*/
1704 1705
    }

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1706 1707 1708 1709 1710
    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),WAIT_PRIOR);
    DBUG_PRINT("info",("query ready"));
    break;
  }
1711
  case COM_FIELD_LIST:				// This isn't actually needed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1712
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1713 1714
    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
1715 1716 1717
    break;
#else
  {
1718
    char *fields, *pend;
1719 1720
    /* Locked closure of all tables */
    TABLE_LIST *locked_tables= NULL;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1721
    TABLE_LIST table_list;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1722
    LEX_STRING conv_name;
1723
    /* Saved variable value */
1724 1725
    my_bool old_innodb_table_locks= 
              IF_INNOBASE_DB(thd->variables.innodb_table_locks, FALSE);
1726

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1727

1728 1729
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_FIELDS],
			&LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1730 1731 1732
    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
1733
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1734 1735
      break;
    }
1736
    pend= strend(packet);
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
1737 1738
    thd->convert_string(&conv_name, system_charset_info,
			packet, (uint) (pend-packet), thd->charset());
1739
    table_list.alias= table_list.table_name= conv_name.str;
1740
    packet= pend+1;
1741 1742 1743 1744 1745 1746 1747 1748 1749

    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;
    }

1750
    thd->query_length= strlen(packet);       // for simplicity: don't optimize
1751 1752
    if (!(thd->query=fields=thd->memdup(packet,thd->query_length+1)))
      break;
1753
    mysql_log.write(thd,command,"%s %s",table_list.table_name, fields);
1754
    if (lower_case_table_names)
1755 1756
      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
1757

monty@mysql.com's avatar
monty@mysql.com committed
1758 1759
    if (check_access(thd,SELECT_ACL,table_list.db,&table_list.grant.privilege,
		     0, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1760
      break;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1761 1762
    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
1763
      break;
1764 1765 1766 1767 1768 1769
    /* 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
1770
    thd->lex->add_to_query_tables(&table_list);
1771

1772 1773
    /* 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
1774
    mysqld_list_fields(thd,&table_list,fields);
1775
    thd->lex->unit.cleanup();
1776
    thd->cleanup_after_query();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1777 1778 1779 1780
    break;
  }
#endif
  case COM_QUIT:
1781
    /* We don't calculate statistics for this command */
1782
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1783 1784 1785 1786
    net->error=0;				// Don't give 'abort' message
    error=TRUE;					// End server
    break;

1787
  case COM_CREATE_DB:				// QQ: To be removed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1788
    {
1789
      char *db=thd->strdup(packet), *alias;
1790
      HA_CREATE_INFO create_info;
1791

1792 1793
      statistic_increment(thd->status_var.com_stat[SQLCOM_CREATE_DB],
			  &LOCK_status);
1794
      // null test to handle EOM
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
1795
      if (!db || !(alias= thd->strdup(db)) || check_db_name(db))
1796
      {
1797
	my_error(ER_WRONG_DB_NAME, MYF(0), db ? db : "NULL");
1798 1799
	break;
      }
hf@deer.(none)'s avatar
hf@deer.(none) committed
1800
      if (check_access(thd,CREATE_ACL,db,0,1,0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1801
	break;
1802
      mysql_log.write(thd,command,packet);
1803
      bzero(&create_info, sizeof(create_info));
1804 1805
      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
1806 1807
      break;
    }
1808
  case COM_DROP_DB:				// QQ: To be removed
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1809
    {
1810 1811
      statistic_increment(thd->status_var.com_stat[SQLCOM_DROP_DB],
			  &LOCK_status);
1812
      char *db=thd->strdup(packet);
monty@mysql.com's avatar
monty@mysql.com committed
1813
      /*  null test to handle EOM */
1814
      if (!db || check_db_name(db))
1815
      {
1816
	my_error(ER_WRONG_DB_NAME, MYF(0), db ? db : "NULL");
1817 1818
	break;
      }
hf@deer.(none)'s avatar
hf@deer.(none) committed
1819
      if (check_access(thd,DROP_ACL,db,0,1,0))
1820
	break;
1821 1822
      if (thd->locked_tables || thd->active_transaction())
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1823 1824
	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
1825
	break;
1826
      }
1827
      mysql_log.write(thd,command,db);
1828
      mysql_rm_db(thd, db, 0, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1829 1830
      break;
    }
1831
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1832 1833
  case COM_BINLOG_DUMP:
    {
monty@mysql.com's avatar
monty@mysql.com committed
1834 1835 1836 1837
      ulong pos;
      ushort flags;
      uint32 slave_server_id;

1838
      statistic_increment(thd->status_var.com_other,&LOCK_status);
1839
      thd->slow_command = TRUE;
1840
      if (check_global_access(thd, REPL_SLAVE_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1841
	break;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1842

1843
      /* TODO: The following has to be changed to an 8 byte integer */
1844 1845
      pos = uint4korr(packet);
      flags = uint2korr(packet + 4);
1846
      thd->server_id=0; /* avoid suicide */
1847
      if ((slave_server_id= uint4korr(packet+6))) // mysqlbinlog.server_id==0
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
1848
	kill_zombie_dump_threads(slave_server_id);
1849
      thd->server_id = slave_server_id;
monty@mysql.com's avatar
monty@mysql.com committed
1850 1851 1852

      mysql_log.write(thd, command, "Log: '%s'  Pos: %ld", packet+10,
                      (long) pos);
1853
      mysql_binlog_send(thd, thd->strdup(packet + 10), (my_off_t) pos, flags);
1854
      unregister_slave(thd,1,1);
monty@mysql.com's avatar
monty@mysql.com committed
1855
      /*  fake COM_QUIT -- if we get here, the thread needs to terminate */
1856 1857
      error = TRUE;
      net->error = 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1858 1859
      break;
    }
1860
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1861 1862
  case COM_REFRESH:
    {
1863 1864
      statistic_increment(thd->status_var.com_stat[SQLCOM_FLUSH],
			  &LOCK_status);
1865
      ulong options= (ulong) (uchar) packet[0];
1866
      if (check_global_access(thd,RELOAD_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1867
	break;
1868
      mysql_log.write(thd,command,NullS);
1869
      if (!reload_acl_and_cache(thd, options, (TABLE_LIST*) 0, NULL))
1870
        send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1871 1872
      break;
    }
1873
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1874
  case COM_SHUTDOWN:
1875
  {
1876
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1877
    if (check_global_access(thd,SHUTDOWN_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1878
      break; /* purecov: inspected */
1879
    /*
1880 1881 1882 1883
      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].
1884
    */
1885 1886
    enum mysql_enum_shutdown_level level=
      (enum mysql_enum_shutdown_level) (uchar) packet[0];
1887
    DBUG_PRINT("quit",("Got shutdown command for level %u", level));
1888 1889 1890 1891 1892 1893 1894
    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;
    }
1895
    DBUG_PRINT("quit",("Got shutdown command for level %u", level));
1896
    mysql_log.write(thd,command,NullS);
1897
    send_eof(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1898 1899 1900
#ifdef __WIN__
    sleep(1);					// must wait after eof()
#endif
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1901
#ifndef OS2
1902
    send_eof(thd);				// This is for 'quit request'
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
1903
#endif
1904
    close_connection(thd, 0, 1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1905 1906 1907 1908
    close_thread_tables(thd);			// Free before kill
    kill_mysql();
    error=TRUE;
    break;
1909
  }
1910
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1911 1912
  case COM_STATISTICS:
  {
1913
    mysql_log.write(thd,command,NullS);
1914 1915
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_STATUS],
			&LOCK_status);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1916
#ifndef EMBEDDED_LIBRARY
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1917
    char buff[200];
hf@deer.(none)'s avatar
hf@deer.(none) committed
1918 1919 1920
#else
    char *buff= thd->net.last_error;
#endif
1921
    ulong uptime = (ulong) (thd->start_time - start_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1922
    sprintf((char*) buff,
1923
	    "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
1924
	    uptime,
1925 1926 1927
	    (int) thread_count, (ulong) thd->query_id,
            (ulong) thd->status_var.long_query_count,
	    thd->status_var.opened_tables, refresh_version, cached_tables(),
1928 1929
	    (uptime ? (ulonglong2double(thd->query_id) / (double) uptime) :
	     (double) 0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1930
#ifdef SAFEMALLOC
1931
    if (sf_malloc_cur_memory)				// Using SAFEMALLOC
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1932
      sprintf(strend(buff), "  Memory in use: %ldK  Max memory used: %ldK",
1933 1934
	      (sf_malloc_cur_memory+1023L)/1024L,
	      (sf_malloc_max_memory+1023L)/1024L);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1935 1936
#endif
#ifndef EMBEDDED_LIBRARY
1937
    VOID(my_net_write(net, buff,(uint) strlen(buff)));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1938
    VOID(net_flush(net));
hf@deer.(none)'s avatar
hf@deer.(none) committed
1939
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1940 1941 1942
    break;
  }
  case COM_PING:
1943
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1944
    send_ok(thd);				// Tell client we are alive
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1945 1946
    break;
  case COM_PROCESS_INFO:
1947 1948
    statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_PROCESSLIST],
			&LOCK_status);
1949
    if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1950
      break;
1951
    mysql_log.write(thd,command,NullS);
hf@deer.(none)'s avatar
hf@deer.(none) committed
1952 1953
    mysqld_list_processes(thd,
			  thd->master_access & PROCESS_ACL ? 
monty@mysql.com's avatar
monty@mysql.com committed
1954
			  NullS : thd->priv_user, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1955 1956 1957
    break;
  case COM_PROCESS_KILL:
  {
1958
    statistic_increment(thd->status_var.com_stat[SQLCOM_KILL], &LOCK_status);
1959
    ulong id=(ulong) uint4korr(packet);
hf@genie.(none)'s avatar
SCRUM  
hf@genie.(none) committed
1960
    kill_one_thread(thd,id,false);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1961 1962
    break;
  }
1963 1964
  case COM_SET_OPTION:
  {
1965 1966
    statistic_increment(thd->status_var.com_stat[SQLCOM_SET_OPTION],
			&LOCK_status);
1967 1968 1969 1970
    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;
1971
      send_eof(thd);
1972 1973 1974
      break;
    case MYSQL_OPTION_MULTI_STATEMENTS_OFF:
      thd->client_capabilities&= ~CLIENT_MULTI_STATEMENTS;
1975
      send_eof(thd);
1976 1977
      break;
    default:
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1978
      my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
1979 1980 1981 1982
      break;
    }
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1983
  case COM_DEBUG:
1984
    statistic_increment(thd->status_var.com_other, &LOCK_status);
1985
    if (check_global_access(thd, SUPER_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1986
      break;					/* purecov: inspected */
1987
    mysql_print_status();
1988
    mysql_log.write(thd,command,NullS);
1989
    send_eof(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1990 1991 1992 1993 1994
    break;
  case COM_SLEEP:
  case COM_CONNECT:				// Impossible here
  case COM_TIME:				// Impossible from client
  case COM_DELAYED_INSERT:
1995
  case COM_END:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1996
  default:
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
1997
    my_message(ER_UNKNOWN_COM_ERROR, ER(ER_UNKNOWN_COM_ERROR), MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1998 1999
    break;
  }
2000 2001
  if (thd->lock || thd->open_tables || thd->derived_tables ||
      thd->prelocked_mode)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2002 2003 2004 2005
  {
    thd->proc_info="closing tables";
    close_thread_tables(thd);			/* Free tables */
  }
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
  /*
    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())
    thd->transaction.xid.null();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2017

2018 2019 2020
  /* 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
2021
  if (thd->net.report_error)
2022
    net_send_error(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2023

2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041
  log_slow_query(thd);

  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);
}


static void log_slow_query(THD *thd)
{
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2042
  time_t start_of_query=thd->start_time;
2043
  thd->end_time();				// Set start time
2044

2045
  /* If not reading from backup and if the query took too long */
2046
  if (!thd->slow_command && !thd->user_time) // do not log 'slow_command' queries
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2047
  {
2048 2049
    thd->proc_info="logging slow query";

2050 2051
    if ((ulong) (thd->start_time - thd->time_after_lock) >
	thd->variables.long_query_time ||
2052 2053
	((thd->server_status &
	  (SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED)) &&
2054
	 (specialflag & SPECIAL_LOG_QUERIES_NOT_USING_INDEXES)))
2055
    {
2056
      thd->status_var.long_query_count++;
2057 2058
      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2059 2060 2061
  }
}

2062

2063 2064 2065 2066 2067
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;
2068
  switch (schema_table_idx) {
2069 2070
  case SCH_SCHEMATA:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2071 2072
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0));   /* purecov: inspected */
2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083
    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:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2084 2085
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0)); /* purecov: inspected */
2086 2087 2088 2089 2090 2091
    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
2092 2093
	my_message(ER_NO_DB_ERROR,
                   ER(ER_NO_DB_ERROR), MYF(0)); /* purecov: inspected */
2094 2095 2096 2097 2098
        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
2099
        my_error(ER_WRONG_DB_NAME, MYF(0), db);
2100 2101 2102 2103 2104 2105
        DBUG_RETURN(1);
      }
      if (check_access(thd,SELECT_ACL,db,&thd->col_access,0,0))
        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
2106 2107
	my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
                 thd->priv_user, thd->priv_host, db);
2108 2109
	DBUG_RETURN(1);
      }
2110 2111 2112 2113 2114
      /*
        We need to do a copy to make this prepared statement safe if this
        was thd->db
      */
      lex->select_lex.db= thd->strdup(db);
2115 2116 2117 2118 2119 2120
      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
2121 2122
    my_message(ER_NOT_ALLOWED_COMMAND,
               ER(ER_NOT_ALLOWED_COMMAND), MYF(0)); /* purecov: inspected */
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
    DBUG_RETURN(1);
#else
    if (table_ident)
    {
      TABLE_LIST **query_tables_last= lex->query_tables_last;
      sel= new SELECT_LEX();
      sel->init_query();
      if(!sel->add_table_to_list(thd, table_ident, 0, 0, TL_READ, 
                                 (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 '_'
2137
      remove_escape(table_list->table_name);
2138 2139 2140 2141 2142 2143 2144 2145 2146
      if (check_access(thd,SELECT_ACL | EXTRA_ACL,db,
                       &table_list->grant.privilege, 0, 0))
        DBUG_RETURN(1);				/* purecov: inspected */
      if (grant_option && check_grant(thd, SELECT_ACL, table_list, 2,
                                      UINT_MAX, 0))
        DBUG_RETURN(1);
      break;
    }
#endif
2147 2148 2149
  case SCH_OPEN_TABLES:
  case SCH_VARIABLES:
  case SCH_STATUS:
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170
  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;
2171
  table_list->schema_table_reformed= 1;
2172 2173 2174 2175
  DBUG_RETURN(0);
}


2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
/*
  Read query from packet and store in thd->query
  Used in COM_QUERY and COM_PREPARE

  DESCRIPTION
    Sets the following THD variables:
      query
      query_length

  RETURN VALUES
2186 2187
    FALSE ok
    TRUE  error;  In this case thd->fatal_error is set
2188 2189 2190 2191 2192
*/

bool alloc_query(THD *thd, char *packet, ulong packet_length)
{
  packet_length--;				// Remove end null
2193
  /* Remove garbage at start and end of query */
2194
  while (my_isspace(thd->charset(),packet[0]) && packet_length > 0)
2195 2196 2197 2198 2199
  {
    packet++;
    packet_length--;
  }
  char *pos=packet+packet_length;		// Point at end null
peter@mysql.com's avatar
peter@mysql.com committed
2200
  while (packet_length > 0 &&
2201
	 (pos[-1] == ';' || my_isspace(thd->charset() ,pos[-1])))
2202 2203 2204 2205 2206
  {
    pos--;
    packet_length--;
  }
  /* We must allocate some extra memory for query cache */
monty@mysql.com's avatar
monty@mysql.com committed
2207
  thd->query_length= 0;                        // Extra safety: Avoid races
2208 2209
  if (!(thd->query= (char*) thd->memdup_w_gap((gptr) (packet),
					      packet_length,
2210 2211
					      thd->db_length+ 1 +
					      QUERY_CACHE_FLAGS_SIZE)))
2212
    return TRUE;
2213 2214
  thd->query[packet_length]=0;
  thd->query_length= packet_length;
2215 2216 2217 2218

  /* Reclaim some memory */
  thd->packet.shrink(thd->variables.net_buffer_length);
  thd->convert_buffer.shrink(thd->variables.net_buffer_length);
2219 2220 2221

  if (!(specialflag & SPECIAL_NO_PRIOR))
    my_pthread_setprio(pthread_self(),QUERY_PRIOR);
2222
  return FALSE;
2223 2224
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2225 2226 2227 2228 2229
/****************************************************************************
** mysql_execute_command
** Execute command saved in thd and current_lex->sql_command
****************************************************************************/

2230
bool
2231
mysql_execute_command(THD *thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2232
{
2233
  bool	res= FALSE;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2234
  int result= 0;
2235
  LEX	*lex= thd->lex;
monty@mysql.com's avatar
monty@mysql.com committed
2236
  /* first SELECT_LEX (have special meaning for many of non-SELECTcommands) */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2237
  SELECT_LEX *select_lex= &lex->select_lex;
2238 2239
  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
2240
  /* first table of first SELECT_LEX */
monty@mysql.com's avatar
monty@mysql.com committed
2241
  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
2242 2243 2244
  /* list of all tables in query */
  TABLE_LIST *all_tables;
  /* most outer SELECT_LEX_UNIT of query */
2245
  SELECT_LEX_UNIT *unit= &lex->unit;
2246
  /* Saved variable value */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2247
  DBUG_ENTER("mysql_execute_command");
2248
  thd->net.no_send_error= 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2249

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265
  /*
    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();
2266
  /* should be assigned after making first tables same */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2267 2268
  all_tables= lex->query_tables;

2269 2270 2271 2272 2273
  /*
    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.
2274
    Don't reset warnings when executing a stored routine.
2275
  */
2276 2277 2278
  if ((all_tables || &lex->select_lex != lex->all_selects_list ||
       lex->spfuns.records || lex->spprocs.records) &&
      !thd->spcont)
monty@mysql.com's avatar
monty@mysql.com committed
2279
    mysql_reset_errors(thd, 0);
2280

hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
2281
#ifdef HAVE_REPLICATION
2282 2283
  if (thd->slave_thread)
  {
2284
    if (lex->sql_command == SQLCOM_UPDATE_MULTI)
2285 2286 2287
    {
      DBUG_PRINT("info",("need faked locked tables"));
      
2288
      if (check_multi_update_lock(thd))
2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299
        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
2300
    /*
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2301
      Skip if we are in the slave thread, some table rules have been
2302 2303 2304 2305
      given and the table list says the query should not be replicated.
      Exception is 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
2306
    */
2307 2308
    if (!(lex->sql_command == SQLCOM_DROP_TABLE &&
          lex->drop_temporary && lex->drop_if_exists) &&
guilhem@mysql.com's avatar
Merge  
guilhem@mysql.com committed
2309
        all_tables_not_ok(thd, all_tables))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
2310 2311
    {
      /* we warn the slave SQL thread */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2312
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
2313
      DBUG_RETURN(0);
guilhem@mysql.com's avatar
guilhem@mysql.com committed
2314
    }
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2315 2316
#ifndef TO_BE_DELETED
    /*
2317 2318 2319
      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
2320
    */
2321 2322 2323
    if (lex->sql_command == SQLCOM_SELECT)
    {
      lex->sql_command = SQLCOM_DO;
2324
      lex->insert_list = &select_lex->item_list;
2325
    }
monty@hundin.mysql.fi's avatar
merge  
monty@hundin.mysql.fi committed
2326
#endif
2327
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
2328
#endif /* !HAVE_REPLICATION */
2329

acurtis@xiphis.org's avatar
Merge  
acurtis@xiphis.org committed
2330 2331 2332



2333

2334 2335 2336 2337 2338
  /*
    When option readonly is set deny operations which change tables.
    Except for the replication thread and the 'super' users.
  */
  if (opt_readonly &&
monty@mysql.com's avatar
monty@mysql.com committed
2339
      !(thd->slave_thread || (thd->master_access & SUPER_ACL)) &&
2340
      uc_update_queries[lex->sql_command])
2341
  {
2342
    my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--read-only");
2343
    DBUG_RETURN(-1);
2344
  }
2345

2346 2347
  statistic_increment(thd->status_var.com_stat[lex->sql_command],
		      &LOCK_status);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2348 2349 2350
  switch (lex->sql_command) {
  case SQLCOM_SELECT:
  {
2351 2352 2353 2354 2355 2356 2357
    /* assign global limit variable if limit is not given */
    {
      SELECT_LEX *param= lex->unit.global_parameters;
      if (!param->explicit_limit)
	param->select_limit= thd->variables.select_limit;
    }

2358
    select_result *result=lex->result;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2359
    if (all_tables)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2360
    {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2361 2362 2363 2364
      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
2365 2366
    }
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2367 2368 2369
      res= check_access(thd,
			lex->exchange ? SELECT_ACL | FILE_ACL : SELECT_ACL,
			any_db, 0, 0, 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2370
    if (res)
2371
      goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2372

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2373
    if (!(res= open_and_lock_tables(thd, all_tables)))
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2374
    {
2375
      if (lex->describe)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2376
      {
2377
	if (!(result= new select_send()))
2378
	  goto error;
2379 2380
	else
	  thd->send_explain_fields(result);
2381
	res= mysql_explain_union(thd, &thd->lex->unit, result);
2382 2383 2384 2385 2386
	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
2387
	  thd->lex->unit.print(&str);
2388 2389 2390 2391
	  str.append('\0');
	  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
		       ER_YES, str.ptr());
	}
2392
	result->send_eof();
2393
        delete result;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2394 2395 2396
      }
      else
      {
2397
	if (!result && !(result= new select_send()))
2398
          goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2399
	query_cache_store_query(thd, all_tables);
2400
	res= handle_select(thd, lex, result, 0);
2401 2402
        if (result != lex->result)
          delete result;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2403
      }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2404
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2405 2406
    break;
  }
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2407
  case SQLCOM_PREPARE:
2408
  {
2409 2410 2411 2412
    char *query_str;
    uint query_len;
    if (lex->prepared_stmt_code_is_varref)
    {
2413
      /* This is PREPARE stmt FROM @var. */
2414 2415 2416 2417
      String str;
      CHARSET_INFO *to_cs= thd->variables.collation_connection;
      bool need_conversion;
      user_var_entry *entry;
2418
      String *pstr= &str;
2419
      uint32 unused;
2420
      /*
2421 2422 2423
        Convert @var contents to string in connection character set. Although
        it is known that int/real/NULL value cannot be a valid query we still
        convert it for error messages to uniform.
2424
      */
2425 2426
      if ((entry=
             (user_var_entry*)hash_search(&thd->user_vars,
2427 2428 2429 2430
                                          (byte*)lex->prepared_stmt_code.str,
                                          lex->prepared_stmt_code.length))
          && entry->value)
      {
2431 2432
        my_bool is_var_null;
        pstr= entry->val_str(&is_var_null, &str, NOT_FIXED_DEC);
2433 2434 2435 2436
        /*
          NULL value of variable checked early as entry->value so here
          we can't get NULL in normal conditions
        */
2437 2438
        DBUG_ASSERT(!is_var_null);
        if (!pstr)
2439
          goto error;
2440 2441
      }
      else
2442 2443 2444 2445 2446
      {
        /*
          variable absent or equal to NULL, so we need to set variable to
          something reasonable to get readable error message during parsing
        */
2447
        str.set("NULL", 4, &my_charset_latin1);
2448 2449
      }

2450
      need_conversion=
2451 2452
        String::needs_conversion(pstr->length(), pstr->charset(),
                                 to_cs, &unused);
2453

2454 2455
      query_len= need_conversion? (pstr->length() * to_cs->mbmaxlen) :
                                  pstr->length();
2456
      if (!(query_str= alloc_root(thd->mem_root, query_len+1)))
2457
        goto error;
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
2458
 
2459
      if (need_conversion)
2460 2461 2462 2463 2464 2465
      {
        uint dummy_errors;
        query_len= copy_and_convert(query_str, query_len, to_cs,
                                    pstr->ptr(), pstr->length(),
                                    pstr->charset(), &dummy_errors);
      }
2466
      else
2467
        memcpy(query_str, pstr->ptr(), pstr->length());
2468
      query_str[query_len]= 0;
2469 2470 2471
    }
    else
    {
2472 2473
      query_str= lex->prepared_stmt_code.str;
      query_len= lex->prepared_stmt_code.length;
2474
      DBUG_PRINT("info", ("PREPARE: %.*s FROM '%.*s' \n",
2475 2476
                          lex->prepared_stmt_name.length,
                          lex->prepared_stmt_name.str,
2477
                          query_len, query_str));
2478
    }
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2479
    thd->command= COM_PREPARE;
2480 2481
    if (!(res= mysql_stmt_prepare(thd, query_str, query_len + 1,
                                  &lex->prepared_stmt_name)))
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2482 2483 2484 2485 2486
      send_ok(thd, 0L, 0L, "Statement prepared");
    break;
  }
  case SQLCOM_EXECUTE:
  {
2487
    DBUG_PRINT("info", ("EXECUTE: %.*s\n",
2488 2489 2490
                        lex->prepared_stmt_name.length,
                        lex->prepared_stmt_name.str));
    mysql_sql_stmt_execute(thd, &lex->prepared_stmt_name);
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2491 2492 2493 2494 2495
    lex->prepared_stmt_params.empty();
    break;
  }
  case SQLCOM_DEALLOCATE_PREPARE:
  {
2496 2497 2498 2499 2500
    Statement* stmt;
    DBUG_PRINT("info", ("DEALLOCATE PREPARE: %.*s\n", 
                        lex->prepared_stmt_name.length,
                        lex->prepared_stmt_name.str));
    if ((stmt= thd->stmt_map.find_by_name(&lex->prepared_stmt_name)))
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2501
    {
2502 2503
      thd->stmt_map.erase(stmt);
      send_ok(thd);
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2504
    }
2505
    else
2506 2507
    {
      my_error(ER_UNKNOWN_STMT_HANDLER, MYF(0),
2508 2509
               lex->prepared_stmt_name.length,
               lex->prepared_stmt_name.str,
2510
               "DEALLOCATE PREPARE");
2511
      goto error;
2512
    }
sergefp@mysql.com's avatar
sergefp@mysql.com committed
2513 2514
    break;
  }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2515
  case SQLCOM_DO:
2516 2517
    if (check_table_access(thd, SELECT_ACL, all_tables, 0) ||
        open_and_lock_tables(thd, all_tables))
2518
      goto error;
2519 2520

    res= mysql_do(thd, *lex->insert_list);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2521 2522
    break;

2523
  case SQLCOM_EMPTY_QUERY:
2524
    send_ok(thd);
2525 2526
    break;

2527 2528 2529 2530
  case SQLCOM_HELP:
    res= mysqld_help(thd,lex->help_arg);
    break;

2531
#ifndef EMBEDDED_LIBRARY
2532
  case SQLCOM_PURGE:
2533
  {
2534
    if (check_global_access(thd, SUPER_ACL))
2535
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
2536
    /* PURGE MASTER LOGS TO 'file' */
2537 2538 2539
    res = purge_master_logs(thd, lex->to_log);
    break;
  }
2540 2541
  case SQLCOM_PURGE_BEFORE:
  {
2542 2543
    Item *it;

2544 2545
    if (check_global_access(thd, SUPER_ACL))
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
2546
    /* PURGE MASTER LOGS BEFORE 'data' */
2547
    it= (Item *)lex->value_list.head();
2548 2549
    if ((!it->fixed &&it->fix_fields(lex->thd, 0, &it)) ||
        it->check_cols(1))
2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560
    {
      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());
2561 2562
    break;
  }
2563
#endif
2564 2565
  case SQLCOM_SHOW_WARNS:
  {
2566 2567
    res= mysqld_show_warnings(thd, (ulong)
			      ((1L << (uint) MYSQL_ERROR::WARN_LEVEL_NOTE) |
2568 2569 2570
			       (1L << (uint) MYSQL_ERROR::WARN_LEVEL_WARN) |
			       (1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR)
			       ));
2571 2572 2573 2574
    break;
  }
  case SQLCOM_SHOW_ERRORS:
  {
2575 2576
    res= mysqld_show_warnings(thd, (ulong)
			      (1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR));
2577 2578
    break;
  }
2579 2580
  case SQLCOM_SHOW_NEW_MASTER:
  {
2581
    if (check_global_access(thd, REPL_SLAVE_ACL))
2582
      goto error;
2583
    /* This query don't work now. See comment in repl_failsafe.cc */
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
2584
#ifndef WORKING_NEW_MASTER
2585 2586
    my_error(ER_NOT_SUPPORTED_YET, MYF(0), "SHOW NEW MASTER");
    goto error;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
2587
#else
2588 2589
    res = show_new_master(thd);
    break;
2590
#endif
2591
  }
2592

2593
#ifdef HAVE_REPLICATION
2594 2595
  case SQLCOM_SHOW_SLAVE_HOSTS:
  {
2596
    if (check_global_access(thd, REPL_SLAVE_ACL))
2597 2598 2599 2600
      goto error;
    res = show_slave_hosts(thd);
    break;
  }
2601 2602
  case SQLCOM_SHOW_BINLOG_EVENTS:
  {
2603
    if (check_global_access(thd, REPL_SLAVE_ACL))
2604
      goto error;
2605
    res = mysql_show_binlog_events(thd);
2606 2607
    break;
  }
2608 2609
#endif

2610
  case SQLCOM_BACKUP_TABLE:
2611
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2612 2613 2614
    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) ||
2615
	check_global_access(thd, FILE_ACL))
2616
      goto error; /* purecov: inspected */
2617
    thd->slow_command=TRUE;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2618
    res = mysql_backup_table(thd, first_table);
2619

2620 2621
    break;
  }
2622
  case SQLCOM_RESTORE_TABLE:
2623
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2624 2625 2626
    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) ||
2627
	check_global_access(thd, FILE_ACL))
2628
      goto error; /* purecov: inspected */
2629
    thd->slow_command=TRUE;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2630
    res = mysql_restore_table(thd, first_table);
2631 2632
    break;
  }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2633 2634
  case SQLCOM_ASSIGN_TO_KEYCACHE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2635 2636 2637 2638
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
        check_access(thd, INDEX_ACL, first_table->db,
                     &first_table->grant.privilege, 0, 0))
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2639
      goto error;
2640
    res= mysql_assign_to_keycache(thd, first_table, &lex->ident);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2641 2642
    break;
  }
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2643 2644
  case SQLCOM_PRELOAD_KEYS:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2645 2646 2647 2648
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables) ||
	check_access(thd, INDEX_ACL, first_table->db,
                     &first_table->grant.privilege, 0, 0))
2649
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2650
    res = mysql_preload_keys(thd, first_table);
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
2651 2652
    break;
  }
2653
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2654
  case SQLCOM_CHANGE_MASTER:
2655
  {
2656
    if (check_global_access(thd, SUPER_ACL))
2657
      goto error;
2658
    pthread_mutex_lock(&LOCK_active_mi);
2659
    res = change_master(thd,active_mi);
2660
    pthread_mutex_unlock(&LOCK_active_mi);
2661 2662
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2663
  case SQLCOM_SHOW_SLAVE_STAT:
2664
  {
2665 2666
    /* Accept one of two privileges */
    if (check_global_access(thd, SUPER_ACL | REPL_CLIENT_ACL))
2667
      goto error;
2668
    pthread_mutex_lock(&LOCK_active_mi);
2669
    res = show_master_info(thd,active_mi);
2670
    pthread_mutex_unlock(&LOCK_active_mi);
2671 2672
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2673
  case SQLCOM_SHOW_MASTER_STAT:
2674
  {
2675 2676
    /* Accept one of two privileges */
    if (check_global_access(thd, SUPER_ACL | REPL_CLIENT_ACL))
2677 2678 2679 2680
      goto error;
    res = show_binlog_info(thd);
    break;
  }
peter@mysql.com's avatar
peter@mysql.com committed
2681

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

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2742
  case SQLCOM_CREATE_TABLE:
2743
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2744 2745 2746 2747 2748
    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
2749

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2750
    if ((res= create_table_precheck(thd, select_tables, create_table)))
2751
      goto unsent_create_error;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2752

2753 2754 2755
#ifndef HAVE_READLINK
    lex->create_info.data_file_name=lex->create_info.index_file_name=0;
#else
2756
    /* Fix names if symlinked tables */
2757
    if (append_file_to_dir(thd, &lex->create_info.data_file_name,
2758
			   create_table->table_name) ||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2759
	append_file_to_dir(thd, &lex->create_info.index_file_name,
2760
			   create_table->table_name))
2761
      goto unsent_create_error;
2762
#endif
2763
    /*
2764
      If we are using SET CHARSET without DEFAULT, add an implicit
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775
      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;
    }
2776
    if (select_lex->item_list.elements)		// With select
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2777 2778
    {
      select_result *result;
2779

2780
      select_lex->options|= SELECT_NO_UNLOCK;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2781
      unit->set_limit(select_lex, select_lex);
2782

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2783
      if (!(res= open_and_lock_tables(thd, select_tables)))
2784
      {
2785 2786 2787 2788 2789 2790 2791
        /*
          Is table which we are changing used somewhere in other parts
          of query
        */
        if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
            unique_table(create_table, select_tables))
        {
2792
          my_error(ER_UPDATE_TABLE_USED, MYF(0), create_table->table_name);
2793
          goto unsent_create_error;
2794
        }
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2795 2796 2797 2798 2799 2800 2801 2802 2803 2804
        /* 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)
          {
            if (unique_table(tab, select_tables))
            {
2805
              my_error(ER_UPDATE_TABLE_USED, MYF(0), tab->table_name);
2806
              goto unsent_create_error;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2807 2808 2809
            }
          }
        }
2810

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2811 2812 2813 2814 2815
        if ((result= new select_create(create_table,
				       &lex->create_info,
				       lex->create_list,
				       lex->key_list,
				       select_lex->item_list,
2816 2817
				       lex->duplicates,
				       lex->ignore)))
2818 2819 2820 2821 2822 2823
        {
          /*
            CREATE from SELECT give its SELECT_LEX for SELECT,
            and item_list belong to SELECT
          */
          select_lex->resolve_mode= SELECT_LEX::SELECT_MODE;
2824
          res= handle_select(thd, lex, result, 0);
2825
          select_lex->resolve_mode= SELECT_LEX::NOMATTER_MODE;
2826
          delete result;
2827
        }
monty@mysql.com's avatar
monty@mysql.com committed
2828
	/* reset for PS */
2829 2830
	lex->create_list.empty();
	lex->key_list.empty();
2831 2832
      }
    }
monty@mysql.com's avatar
monty@mysql.com committed
2833
    else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2834
    {
monty@mysql.com's avatar
monty@mysql.com committed
2835
      /* regular create */
venu@myvenu.com's avatar
venu@myvenu.com committed
2836
      if (lex->name)
monty@mysql.com's avatar
monty@mysql.com committed
2837
        res= mysql_create_like_table(thd, create_table, &lex->create_info, 
venu@myvenu.com's avatar
venu@myvenu.com committed
2838 2839
                                     (Table_ident *)lex->name); 
      else
2840
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2841
        res= mysql_create_table(thd, create_table->db,
2842
				create_table->table_name, &lex->create_info,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2843
				lex->create_list,
monty@mysql.com's avatar
monty@mysql.com committed
2844
				lex->key_list, 0, 0);
2845
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2846
      if (!res)
2847
	send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2848
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2849
    lex->link_first_table_back(create_table, link_to_local);
2850 2851
    break;

monty@mysql.com's avatar
monty@mysql.com committed
2852
    /* put tables back for PS rexecuting */
2853
unsent_create_error:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2854
    lex->link_first_table_back(create_table, link_to_local);
2855
    goto error;
2856
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2857
  case SQLCOM_CREATE_INDEX:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2858 2859
    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
2860
      goto error; /* purecov: inspected */
2861
    thd->slow_command=TRUE;
2862
    if (end_active_trans(thd))
2863
      goto error;
2864
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2865
      res = mysql_create_index(thd, first_table, lex->key_list);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2866 2867
    break;

2868
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2869
  case SQLCOM_SLAVE_START:
2870
  {
2871
    pthread_mutex_lock(&LOCK_active_mi);
2872
    start_slave(thd,active_mi,1 /* net report*/);
2873
    pthread_mutex_unlock(&LOCK_active_mi);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2874
    break;
2875
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2876
  case SQLCOM_SLAVE_STOP:
2877 2878 2879 2880 2881 2882
  /*
    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,
2883
      so it waits for the client thread because t is locked by it.
2884
    - then the client thread does SLAVE STOP.
2885 2886
      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.
2887 2888 2889 2890 2891
    To prevent that, refuse SLAVE STOP if the
    client thread has locked tables
  */
  if (thd->locked_tables || thd->active_transaction())
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2892 2893
    my_message(ER_LOCK_OR_ACTIVE_TRANSACTION, ER(ER_LOCK_OR_ACTIVE_TRANSACTION),
               MYF(0));
2894
    goto error;
2895
  }
2896
  {
2897
    pthread_mutex_lock(&LOCK_active_mi);
2898
    stop_slave(thd,active_mi,1/* net report*/);
2899
    pthread_mutex_unlock(&LOCK_active_mi);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2900
    break;
2901
  }
2902
#endif /* HAVE_REPLICATION */
2903

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2904
  case SQLCOM_ALTER_TABLE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2905
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2906
#if defined(DONT_ALLOW_SHOW_COMMANDS)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2907 2908
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
2909
    goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2910 2911
#else
    {
2912
      ulong priv=0;
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2913
      if (lex->name && (!lex->name[0] || strlen(lex->name) > NAME_LEN))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2914
      {
2915
	my_error(ER_WRONG_TABLE_NAME, MYF(0), lex->name);
2916
        goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2917
      }
2918
      if (!select_lex->db)
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2919 2920 2921
	select_lex->db= first_table->db;
      if (check_access(thd, ALTER_ACL, first_table->db,
		       &first_table->grant.privilege, 0, 0) ||
hf@deer.(none)'s avatar
hf@deer.(none) committed
2922
	  check_access(thd,INSERT_ACL | CREATE_ACL,select_lex->db,&priv,0,0)||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2923
	  check_merge_table_access(thd, first_table->db,
2924 2925 2926
				   (TABLE_LIST *)
				   lex->create_info.merge_list.first))
	goto error;				/* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2927 2928
      if (grant_option)
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2929
	if (check_grant(thd, ALTER_ACL, all_tables, 0, UINT_MAX, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2930 2931 2932 2933 2934
	  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));
2935
	  tmp_table.table_name=lex->name;
2936
	  tmp_table.db=select_lex->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2937
	  tmp_table.grant.privilege=priv;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
2938 2939
	  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
2940 2941 2942
	    goto error;
	}
      }
2943 2944
      /* 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
2945
      /* ALTER TABLE ends previous transaction */
2946
      if (end_active_trans(thd))
2947
	goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2948
      else
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2949
      {
2950
        thd->slow_command=TRUE;
2951
	res= mysql_alter_table(thd, select_lex->db, lex->name,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2952
			       &lex->create_info,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2953
			       first_table, lex->create_list,
2954
			       lex->key_list,
2955
			       select_lex->order_list.elements,
2956
                               (ORDER *) select_lex->order_list.first,
monty@mysql.com's avatar
monty@mysql.com committed
2957 2958
			       lex->duplicates, lex->ignore, &lex->alter_info,
                               1);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2959
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2960 2961
      break;
    }
hf@deer.(none)'s avatar
hf@deer.(none) committed
2962
#endif /*DONT_ALLOW_SHOW_COMMANDS*/
2963
  case SQLCOM_RENAME_TABLE:
2964
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2965
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
2966
    TABLE_LIST *table;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2967
    if (check_db_used(thd, all_tables))
2968
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2969
    for (table= first_table; table; table= table->next_local->next_local)
2970
    {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2971
      if (check_access(thd, ALTER_ACL | DROP_ACL, table->db,
hf@deer.(none)'s avatar
hf@deer.(none) committed
2972
		       &table->grant.privilege,0,0) ||
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2973 2974
	  check_access(thd, INSERT_ACL | CREATE_ACL, table->next_local->db,
		       &table->next_local->grant.privilege, 0, 0))
2975 2976 2977
	goto error;
      if (grant_option)
      {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2978
	TABLE_LIST old_list, new_list;
2979 2980 2981 2982
	/*
	  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
2983 2984 2985 2986
	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,
2987
			    INSERT_ACL | CREATE_ACL) &&
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2988
	     check_grant(thd, INSERT_ACL | CREATE_ACL, &new_list, 0, 1, 0)))
2989 2990 2991
	  goto error;
      }
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
2992
    query_cache_invalidate3(thd, first_table, 0);
2993 2994
    if (end_active_trans(thd) || mysql_rename_tables(thd, first_table))
      goto error;
2995
    break;
2996
  }
2997
#ifndef EMBEDDED_LIBRARY
2998 2999
  case SQLCOM_SHOW_BINLOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3000 3001
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
3002
    goto error;
3003 3004
#else
    {
3005
      if (check_global_access(thd, SUPER_ACL))
3006 3007 3008 3009
	goto error;
      res = show_binlogs(thd);
      break;
    }
peter@mysql.com's avatar
peter@mysql.com committed
3010
#endif
3011
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3012
  case SQLCOM_SHOW_CREATE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3013
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3014
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3015 3016
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0)); /* purecov: inspected */
3017
    goto error;
3018
#else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3019
    {
3020 3021 3022 3023
      /* 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
3024 3025 3026
      if (check_db_used(thd, all_tables) ||
	  check_access(thd, SELECT_ACL | EXTRA_ACL, first_table->db,
		       &first_table->grant.privilege, 0, 0))
3027
	goto error;
monty@mishka.local's avatar
monty@mishka.local committed
3028
      if (grant_option && check_grant(thd, SELECT_ACL, all_tables, 2, UINT_MAX, 0))
3029
	goto error;
monty@mishka.local's avatar
monty@mishka.local committed
3030
      res= mysqld_show_create(thd, first_table);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3031 3032
      break;
    }
3033
#endif
3034 3035
  case SQLCOM_CHECKSUM:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3036 3037 3038
    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))
3039
      goto error; /* purecov: inspected */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3040
    res = mysql_checksum_table(thd, first_table, &lex->check_opt);
3041 3042
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3043
  case SQLCOM_REPAIR:
3044
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3045 3046 3047
    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))
3048
      goto error; /* purecov: inspected */
3049
    thd->slow_command=TRUE;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3050
    res= mysql_repair_table(thd, first_table, &lex->check_opt);
3051 3052 3053 3054 3055
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3056
	thd->clear_error(); // No binlog error generated
3057
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3058 3059 3060
        mysql_bin_log.write(&qinfo);
      }
    }
3061 3062
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3063
  case SQLCOM_CHECK:
3064
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3065 3066 3067
    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))
3068
      goto error; /* purecov: inspected */
3069
    thd->slow_command=TRUE;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3070
    res = mysql_check_table(thd, first_table, &lex->check_opt);
3071 3072
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3073 3074
  case SQLCOM_ANALYZE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3075 3076 3077
    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
3078
      goto error; /* purecov: inspected */
3079
    thd->slow_command=TRUE;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3080
    res = mysql_analyze_table(thd, first_table, &lex->check_opt);
3081 3082 3083 3084 3085
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3086
	thd->clear_error(); // No binlog error generated
3087
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3088 3089 3090
        mysql_bin_log.write(&qinfo);
      }
    }
3091
    break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3092
  }
3093

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3094 3095
  case SQLCOM_OPTIMIZE:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3096 3097 3098
    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
3099
      goto error; /* purecov: inspected */
3100
    thd->slow_command=TRUE;
3101
    res= (specialflag & (SPECIAL_SAFE_MODE | SPECIAL_NO_NEW_FUNC)) ?
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3102 3103
      mysql_recreate_table(thd, first_table, 1) :
      mysql_optimize_table(thd, first_table, &lex->check_opt);
3104 3105 3106 3107 3108
    /* ! we write after unlocking the table */
    if (!res && !lex->no_write_to_binlog)
    {
      if (mysql_bin_log.is_open())
      {
3109
	thd->clear_error(); // No binlog error generated
3110
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3111 3112 3113
        mysql_bin_log.write(&qinfo);
      }
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3114 3115 3116
    break;
  }
  case SQLCOM_UPDATE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3117 3118
    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
3119
      break;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3120 3121 3122 3123 3124 3125 3126
    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,
                               select_lex->select_limit,
3127
                               lex->duplicates, lex->ignore));
3128
    /* 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
3129
    if (result != 2)
3130
      break;
3131
  case SQLCOM_UPDATE_MULTI:
3132
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3133
      DBUG_ASSERT(first_table == all_tables && first_table != 0);
3134
      /* if we switched from normal update, rights are checked */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147
      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,
3148
                              lex->duplicates, lex->ignore, unit, select_lex);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3149
    break;
monty@mysql.com's avatar
monty@mysql.com committed
3150
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3151
  case SQLCOM_REPLACE:
3152 3153
  case SQLCOM_INSERT:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3154
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
monty@mysql.com's avatar
monty@mysql.com committed
3155
    if ((res= insert_precheck(thd, all_tables)))
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3156
      break;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3157
    res= mysql_insert(thd, all_tables, lex->field_list, lex->many_values,
monty@mishka.local's avatar
monty@mishka.local committed
3158
		      lex->update_list, lex->value_list,
3159
                      lex->duplicates, lex->ignore);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3160 3161
    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
3162
    break;
3163
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3164 3165 3166
  case SQLCOM_REPLACE_SELECT:
  case SQLCOM_INSERT_SELECT:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3167
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
monty@mishka.local's avatar
monty@mishka.local committed
3168
    if ((res= insert_precheck(thd, all_tables)))
3169
      break;
monty@mysql.com's avatar
monty@mysql.com committed
3170

3171
    /* Fix lock for first table */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3172 3173
    if (first_table->lock_type == TL_WRITE_DELAYED)
      first_table->lock_type= TL_WRITE;
3174

3175 3176
    /* 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
3177 3178

    select_result *result;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3179
    unit->set_limit(select_lex, select_lex);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3180

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3181
    if (!(res= open_and_lock_tables(thd, all_tables)))
3182
    {
3183
      /* Skip first table, which is the table we are inserting in */
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
3184
      select_lex->table_list.first= (byte*)first_table->next_local;
3185

3186 3187 3188
      res= mysql_insert_select_prepare(thd);
      if (!res && (result= new select_insert(first_table, first_table->table,
                                             &lex->field_list,
monty@mishka.local's avatar
monty@mishka.local committed
3189
                                             &lex->update_list, &lex->value_list,
3190
                                             lex->duplicates, lex->ignore)))
3191
      {
3192 3193 3194 3195
        /*
          insert/replace from SELECT give its SELECT_LEX for SELECT,
          and item_list belong to SELECT
        */
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
3196
	select_lex->resolve_mode= SELECT_LEX::SELECT_MODE;
3197
	res= handle_select(thd, lex, result, OPTION_SETUP_TABLES_DONE);
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
3198
	select_lex->resolve_mode= SELECT_LEX::INSERT_MODE;
3199 3200
        delete result;
      }
3201
      /* revert changes for SP */
msvensson@neptunus.(none)'s avatar
msvensson@neptunus.(none) committed
3202
      select_lex->table_list.first= (byte*) first_table;
3203
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3204 3205 3206 3207

    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
3208 3209
    break;
  }
3210
  case SQLCOM_TRUNCATE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3211 3212
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_one_table_access(thd, DELETE_ACL, all_tables))
3213
      goto error;
3214 3215 3216 3217
    /*
      Don't allow this within a transaction because we want to use
      re-generate table
    */
3218
    if ((thd->locked_tables && !lex->sphead) || thd->active_transaction())
3219
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3220 3221
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3222 3223
      goto error;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3224

monty@mysql.com's avatar
monty@mysql.com committed
3225
    res= mysql_truncate(thd, first_table, 0);
3226
    break;
3227
  case SQLCOM_DELETE:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3228
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3229 3230
    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
3231
      break;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3232
    res = mysql_delete(thd, all_tables, select_lex->where,
3233
                       &select_lex->order_list,
3234
                       select_lex->select_limit, select_lex->options);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3235 3236
    break;
  }
3237
  case SQLCOM_DELETE_MULTI:
3238
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3239
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3240 3241
    TABLE_LIST *aux_tables=
      (TABLE_LIST *)thd->lex->auxilliary_table_list.first;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3242
    uint table_count;
3243
    multi_delete *result;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3244

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3245
    if ((res= multi_delete_precheck(thd, all_tables, &table_count)))
3246
      break;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
3247

3248
    /* condition will be TRUE on SP re-excuting */
3249 3250
    if (select_lex->item_list.elements != 0)
      select_lex->item_list.empty();
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3251
    if (add_item_to_list(thd, new Item_null()))
3252
      goto error;
3253

3254
    thd->proc_info="init";
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3255 3256 3257 3258
    if ((res= open_and_lock_tables(thd, all_tables)))
      break;

    if ((res= mysql_multi_delete_prepare(thd)))
3259
      goto error;
3260

3261 3262
    if (!thd->is_fatal_error && (result= new multi_delete(thd,aux_tables,
							  table_count)))
3263
    {
3264 3265 3266
      res= mysql_select(thd, &select_lex->ref_pointer_array,
			select_lex->get_table_list(),
			select_lex->with_wild,
3267
			select_lex->item_list,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3268
			select_lex->where,
3269
			0, (ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3270 3271
			(ORDER *)NULL,
			select_lex->options | thd->options |
3272 3273
			SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK |
                        OPTION_SETUP_TABLES_DONE,
3274
			result, unit, select_lex);
3275
      delete result;
3276 3277
    }
    else
3278
      res= TRUE;                                // Error
3279 3280
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3281
  case SQLCOM_DROP_TABLE:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
3282
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3283
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3284 3285
    if (!lex->drop_temporary)
    {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3286
      if (check_table_access(thd, DROP_ACL, all_tables, 0))
3287 3288
	goto error;				/* purecov: inspected */
      if (end_active_trans(thd))
3289
        goto error;
3290
    }
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
3291
    else
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
3292 3293 3294 3295 3296 3297
    {
      /*
	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
3298 3299
	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
3300 3301 3302 3303
      */
      if (thd->slave_thread)
	lex->drop_if_exists= 1;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3304 3305
    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
3306 3307
  }
  break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3308
  case SQLCOM_DROP_INDEX:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3309 3310
    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
3311
      goto error;				/* purecov: inspected */
3312
    if (end_active_trans(thd))
3313
      goto error;
3314
    else
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3315
      res = mysql_drop_index(thd, first_table, &lex->alter_info);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3316 3317
    break;
  case SQLCOM_SHOW_PROCESSLIST:
3318
    if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3319
      break;
hf@deer.(none)'s avatar
hf@deer.(none) committed
3320 3321
    mysqld_list_processes(thd,
			  thd->master_access & PROCESS_ACL ? NullS :
monty@mysql.com's avatar
monty@mysql.com committed
3322
			  thd->priv_user,lex->verbose);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3323
    break;
3324 3325
  case SQLCOM_SHOW_STORAGE_ENGINES:
    res= mysqld_show_storage_engines(thd);
3326 3327 3328 3329 3330 3331 3332
    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
3333 3334
  case SQLCOM_SHOW_LOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3335 3336
    my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND),
               MYF(0));	/* purecov: inspected */
3337
    goto error;
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
3338 3339
#else
    {
hf@deer.(none)'s avatar
hf@deer.(none) committed
3340
      if (grant_option && check_access(thd, FILE_ACL, any_db,0,0,0))
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
3341 3342 3343 3344
	goto error;
      res= mysqld_show_logs(thd);
      break;
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3345 3346
#endif
  case SQLCOM_CHANGE_DB:
3347
    mysql_change_db(thd,select_lex->db);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3348
    break;
3349

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3350 3351
  case SQLCOM_LOAD:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3352
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3353
    uint privilege= (lex->duplicates == DUP_REPLACE ?
3354 3355
		     INSERT_ACL | DELETE_ACL : INSERT_ACL) |
                    (lex->local_file ? 0 : FILE_ACL);
3356

3357
    if (lex->local_file)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3358
    {
3359
      if (!(thd->client_capabilities & CLIENT_LOCAL_FILES) ||
3360
	  ! opt_local_infile)
3361
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3362
	my_message(ER_NOT_ALLOWED_COMMAND, ER(ER_NOT_ALLOWED_COMMAND), MYF(0));
3363 3364
	goto error;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3365
    }
3366 3367 3368 3369

    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
3370
    res= mysql_load(thd, lex->exchange, first_table, lex->field_list,
3371
                    lex->update_list, lex->value_list, lex->duplicates,
3372
                    lex->ignore, (bool) lex->local_file);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3373 3374
    break;
  }
3375

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3376
  case SQLCOM_SET_OPTION:
3377 3378
  {
    List<set_var_base> *lex_var_list= &lex->var_list;
3379
    if ((check_table_access(thd, SELECT_ACL, all_tables, 0) ||
3380 3381
	 open_and_lock_tables(thd, all_tables)))
      goto error;
3382 3383
    if (lex->one_shot_set && not_all_support_one_shot(lex_var_list))
    {
3384 3385
      my_error(ER_RESERVED_SYNTAX, MYF(0), "SET ONE_SHOT");
      goto error;
3386 3387 3388 3389 3390 3391 3392 3393
    }
    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;
3394
      send_ok(thd);
3395
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3396
    break;
3397
  }
3398

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3399
  case SQLCOM_UNLOCK_TABLES:
3400 3401 3402 3403 3404 3405
    /*
      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.
    */
3406
    unlock_locked_tables(thd);
3407 3408
    if (thd->options & OPTION_TABLE_LOCK)
    {
3409
      end_active_trans(thd);
3410
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3411 3412
    }
    if (thd->global_read_lock)
3413
      unlock_global_read_lock(thd);
3414
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3415 3416
    break;
  case SQLCOM_LOCK_TABLES:
3417
    unlock_locked_tables(thd);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3418
    if (check_db_used(thd, all_tables) || end_active_trans(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3419
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3420
    if (check_table_access(thd, LOCK_TABLES_ACL | SELECT_ACL, all_tables, 0))
3421
      goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3422
    thd->in_lock_tables=1;
3423
    thd->options|= OPTION_TABLE_LOCK;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3424

3425
    if (!(res= simple_open_n_lock_tables(thd, all_tables)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3426
    {
3427 3428
#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
3429
	query_cache.invalidate_locked_for_write(first_table);
3430
#endif /*HAVE_QUERY_CACHE*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3431 3432
      thd->locked_tables=thd->lock;
      thd->lock=0;
3433
      send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3434
    }
3435 3436
    else
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3437 3438 3439
    thd->in_lock_tables=0;
    break;
  case SQLCOM_CREATE_DB:
3440
  {
3441
    char *alias;
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
3442
    if (!(alias=thd->strdup(lex->name)) || check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3443
    {
3444
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3445 3446
      break;
    }
3447 3448 3449
    /*
      If in a slave thread :
      CREATE DATABASE DB was certainly not preceded by USE DB.
3450
      For that reason, db_ok() in sql/slave.cc did not check the
3451 3452 3453
      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.
    */
3454
#ifdef HAVE_REPLICATION
3455
    if (thd->slave_thread &&
3456 3457
	(!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
3458
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3459
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
3460
      break;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3461
    }
3462
#endif
hf@deer.(none)'s avatar
hf@deer.(none) committed
3463
    if (check_access(thd,CREATE_ACL,lex->name,0,1,0))
3464
      break;
monty@mysql.com's avatar
monty@mysql.com committed
3465
    res= mysql_create_db(thd,(lower_case_table_names == 2 ? alias : lex->name),
monty@mysql.com's avatar
monty@mysql.com committed
3466
			 &lex->create_info, 0);
3467 3468
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3469
  case SQLCOM_DROP_DB:
3470
  {
3471
    if (check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3472
    {
3473
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3474 3475
      break;
    }
3476 3477 3478 3479 3480 3481 3482
    /*
      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.
    */
3483
#ifdef HAVE_REPLICATION
3484 3485 3486
    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
3487
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3488
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
3489
      break;
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3490
    }
3491
#endif
hf@deer.(none)'s avatar
hf@deer.(none) committed
3492
    if (check_access(thd,DROP_ACL,lex->name,0,1,0))
3493
      break;
3494 3495
    if (thd->locked_tables || thd->active_transaction())
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3496 3497
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3498 3499
      goto error;
    }
3500
    res= mysql_rm_db(thd, lex->name, lex->drop_if_exists, 0);
3501 3502
    break;
  }
3503 3504
  case SQLCOM_ALTER_DB:
  {
3505 3506
    char *db= lex->name ? lex->name : thd->db;
    if (!db)
3507
    {
monty@mishka.local's avatar
monty@mishka.local committed
3508 3509
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
      break;
3510 3511
    }
    if (!strip_sp(db) || check_db_name(db))
3512
    {
3513
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
3514 3515
      break;
    }
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3516 3517 3518
    /*
      If in a slave thread :
      ALTER DATABASE DB may not be preceded by USE DB.
3519
      For that reason, maybe db_ok() in sql/slave.cc did not check the
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3520 3521 3522 3523
      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
3524
    if (thd->slave_thread &&
3525 3526
	(!db_ok(db, replicate_do_db, replicate_ignore_db) ||
	 !db_ok_with_wild_table(db)))
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3527
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3528
      my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
guilhem@mysql.com's avatar
guilhem@mysql.com committed
3529 3530 3531
      break;
    }
#endif
3532
    if (check_access(thd, ALTER_ACL, db, 0, 1, 0))
3533 3534 3535
      break;
    if (thd->locked_tables || thd->active_transaction())
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3536 3537
      my_message(ER_LOCK_OR_ACTIVE_TRANSACTION,
                 ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
3538 3539
      goto error;
    }
3540
    res= mysql_alter_db(thd, db, &lex->create_info);
3541 3542
    break;
  }
3543 3544 3545 3546
  case SQLCOM_SHOW_CREATE_DB:
  {
    if (!strip_sp(lex->name) || check_db_name(lex->name))
    {
3547
      my_error(ER_WRONG_DB_NAME, MYF(0), lex->name);
3548 3549
      break;
    }
vva@eagle.mysql.r18.ru's avatar
vva@eagle.mysql.r18.ru committed
3550
    if (check_access(thd,SELECT_ACL,lex->name,0,1,0))
3551
      break;
3552
    res=mysqld_show_create_db(thd,lex->name,&lex->create_info);
3553 3554
    break;
  }
monty@mysql.com's avatar
monty@mysql.com committed
3555
  case SQLCOM_CREATE_FUNCTION:                  // UDF function
monty@mysql.com's avatar
monty@mysql.com committed
3556 3557 3558
  {
    if (check_access(thd,INSERT_ACL,"mysql",0,1,0))
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3559
#ifdef HAVE_DLOPEN
3560
    if (sp_find_function(thd, lex->spname))
monty@mysql.com's avatar
monty@mysql.com committed
3561
    {
3562
      my_error(ER_UDF_EXISTS, MYF(0), lex->spname->m_name.str);
monty@mysql.com's avatar
monty@mysql.com committed
3563 3564
      goto error;
    }
3565
    if (!(res = mysql_create_function(thd, &lex->udf)))
monty@mysql.com's avatar
monty@mysql.com committed
3566
      send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3567
#else
3568
    res= TRUE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3569 3570
#endif
    break;
monty@mysql.com's avatar
monty@mysql.com committed
3571
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
3572
#ifndef NO_EMBEDDED_ACCESS_CHECKS
3573 3574
  case SQLCOM_CREATE_USER:
  {
3575 3576
    if (check_access(thd, INSERT_ACL, "mysql", 0, 1, 1) &&
        check_global_access(thd,CREATE_USER_ACL))
3577 3578 3579 3580 3581
      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
3582
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3583 3584 3585 3586 3587 3588
        mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
3589 3590
  case SQLCOM_DROP_USER:
  {
3591 3592
    if (check_access(thd, DELETE_ACL, "mysql", 0, 1, 1) &&
        check_global_access(thd,CREATE_USER_ACL))
3593 3594 3595 3596 3597
      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
3598
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3599 3600 3601 3602 3603 3604 3605 3606
        mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
  case SQLCOM_RENAME_USER:
  {
3607 3608
    if (check_access(thd, UPDATE_ACL, "mysql", 0, 1, 1) &&
        check_global_access(thd,CREATE_USER_ACL))
3609 3610 3611 3612 3613
      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
3614
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3615
        mysql_bin_log.write(&qinfo);
3616 3617 3618 3619 3620 3621 3622
      }
      send_ok(thd);
    }
    break;
  }
  case SQLCOM_REVOKE_ALL:
  {
3623 3624
    if (check_access(thd, UPDATE_ACL, "mysql", 0, 1, 1) &&
        check_global_access(thd,CREATE_USER_ACL))
3625 3626 3627 3628 3629
      break;
    if (!(res = mysql_revoke_all(thd, lex->users_list)))
    {
      if (mysql_bin_log.is_open())
      {
3630
	Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3631 3632 3633 3634 3635 3636
	mysql_bin_log.write(&qinfo);
      }
      send_ok(thd);
    }
    break;
  }
3637 3638 3639 3640
  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
3641
		     first_table ?  first_table->db : select_lex->db,
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3642 3643
		     first_table ? &first_table->grant.privilege : 0,
		     first_table ? 0 : 1, 0))
3644 3645
      goto error;

3646 3647 3648
    if (thd->user)				// If not replication
    {
      LEX_USER *user;
3649 3650
      uint counter;

3651
      List_iterator <LEX_USER> user_list(lex->users_list);
3652
      while ((user= user_list++))
3653
      {
3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674
        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);
        if (strcmp(thd->user, user->user.str) ||
            my_strcasecmp(system_charset_info,
                          user->host.str, thd->host_or_ip))
        {
          // TODO: use check_change_password()
          if (check_acl_user(user, &counter) && user->password.str &&
              check_access(thd, UPDATE_ACL,"mysql",0,1,1))
          {
            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
3675 3676
      }
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3677
    if (first_table)
3678
    {
3679 3680
      if (lex->type == TYPE_ENUM_PROCEDURE ||
          lex->type == TYPE_ENUM_FUNCTION)
3681 3682 3683 3684 3685
      {
        uint grants= lex->all_privileges 
		   ? (PROC_ACLS & ~GRANT_ACL) | (lex->grant & GRANT_ACL)
		   : lex->grant;
        if (grant_option && 
3686 3687
	    check_grant_routine(thd, grants | GRANT_ACL, all_tables,
                                lex->type == TYPE_ENUM_PROCEDURE, 0))
3688
	  goto error;
3689 3690 3691 3692
        res= mysql_routine_grant(thd, all_tables,
                                 lex->type == TYPE_ENUM_PROCEDURE, 
                                 lex->users_list, grants,
                                 lex->sql_command == SQLCOM_REVOKE, 0);
3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705
      }
      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())
3706
      {
pem@mysql.com's avatar
pem@mysql.com committed
3707
        thd->clear_error();
monty@mysql.com's avatar
monty@mysql.com committed
3708
        Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3709
        mysql_bin_log.write(&qinfo);
3710 3711 3712 3713
      }
    }
    else
    {
3714
      if (lex->columns.elements || lex->type)
3715
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
3716 3717
	my_message(ER_ILLEGAL_GRANT_FOR_TABLE, ER(ER_ILLEGAL_GRANT_FOR_TABLE),
                   MYF(0));
3718
        goto error;
3719 3720 3721 3722 3723 3724 3725 3726
      }
      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
3727
          thd->clear_error();
3728
	  Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3729 3730
	  mysql_bin_log.write(&qinfo);
	}
3731
	if (lex->sql_command == SQLCOM_GRANT)
3732
	{
3733 3734 3735
	  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
3736
	    reset_mqh(user);
3737
	}
3738 3739 3740 3741
      }
    }
    break;
  }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
3742
#endif /*!NO_EMBEDDED_ACCESS_CHECKS*/
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
3743
  case SQLCOM_RESET:
3744 3745 3746
    /*
      RESET commands are never written to the binary log, so we have to
      initialize this variable because RESET shares the same code as FLUSH
3747 3748 3749 3750
    */
    lex->no_write_to_binlog= 1;
  case SQLCOM_FLUSH:
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3751
    if (check_global_access(thd,RELOAD_ACL) || check_db_used(thd, all_tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3752
      goto error;
3753 3754 3755 3756 3757
    /*
      reload_acl_and_cache() will tell us if we are allowed to write to the
      binlog or not.
    */
    bool write_to_binlog;
3758
    if (!reload_acl_and_cache(thd, lex->type, first_table, &write_to_binlog))
3759 3760 3761 3762 3763 3764 3765 3766 3767
    {
      /*
        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())
        {
3768
          Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
3769 3770 3771 3772 3773
          mysql_bin_log.write(&qinfo);
        }
      }
      send_ok(thd);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3774
    break;
3775
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3776
  case SQLCOM_KILL:
3777 3778 3779
  {
    Item *it= (Item *)lex->value_list.head();

3780
    if ((!it->fixed && it->fix_fields(lex->thd, 0, &it)) || it->check_cols(1))
3781 3782 3783 3784 3785 3786
    {
      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
3787
    break;
3788
  }
hf@deer.(none)'s avatar
hf@deer.(none) committed
3789
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3790
  case SQLCOM_SHOW_GRANTS:
3791 3792
    if ((thd->priv_user &&
	 !strcmp(thd->priv_user,lex->grant_user->user.str)) ||
hf@deer.(none)'s avatar
hf@deer.(none) committed
3793
	!check_access(thd, SELECT_ACL, "mysql",0,1,0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3794 3795 3796 3797
    {
      res = mysql_show_grants(thd,lex->grant_user);
    }
    break;
hf@deer.(none)'s avatar
hf@deer.(none) committed
3798
#endif
3799
  case SQLCOM_HA_OPEN:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3800 3801 3802
    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))
3803
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
3804
    res= mysql_ha_open(thd, first_table, 0);
3805 3806
    break;
  case SQLCOM_HA_CLOSE:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3807 3808
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
    if (check_db_used(thd, all_tables))
3809
      goto error;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3810
    res= mysql_ha_close(thd, first_table);
3811 3812
    break;
  case SQLCOM_HA_READ:
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
3813
    DBUG_ASSERT(first_table == all_tables && first_table != 0);
3814 3815 3816 3817 3818
    /*
      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
3819
    if (check_db_used(thd, all_tables))
3820
      goto error;
3821
    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
3822 3823
                       lex->insert_list, lex->ha_rkey_mode, select_lex->where,
                       select_lex->select_limit, select_lex->offset_limit);
3824 3825
    break;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3826
  case SQLCOM_BEGIN:
3827
    if (begin_trans(thd))
3828
      goto error;
serg@serg.mylan's avatar
serg@serg.mylan committed
3829
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3830 3831
    break;
  case SQLCOM_COMMIT:
3832
    if (end_trans(thd, lex->tx_release ? COMMIT_RELEASE :
serg@serg.mylan's avatar
serg@serg.mylan committed
3833
                              lex->tx_chain ? COMMIT_AND_CHAIN : COMMIT))
3834
      goto error;
3835
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3836 3837
    break;
  case SQLCOM_ROLLBACK:
3838
    if (end_trans(thd, lex->tx_release ? ROLLBACK_RELEASE :
serg@serg.mylan's avatar
serg@serg.mylan committed
3839
                              lex->tx_chain ? ROLLBACK_AND_CHAIN : ROLLBACK))
3840
      goto error;
3841
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3842
    break;
serg@serg.mylan's avatar
serg@serg.mylan committed
3843
  case SQLCOM_RELEASE_SAVEPOINT:
serg@serg.mylan's avatar
serg@serg.mylan committed
3844
  {
3845 3846
    SAVEPOINT *sv;
    for (sv=thd->transaction.savepoints; sv; sv=sv->prev)
serg@serg.mylan's avatar
serg@serg.mylan committed
3847 3848 3849
    {
      if (my_strnncoll(system_charset_info,
                       (uchar *)lex->ident.str, lex->ident.length,
3850
                       (uchar *)sv->name, sv->length) == 0)
serg@serg.mylan's avatar
serg@serg.mylan committed
3851 3852
        break;
    }
3853
    if (sv)
serg@serg.mylan's avatar
serg@serg.mylan committed
3854
    {
3855
      if (ha_release_savepoint(thd, sv))
serg@serg.mylan's avatar
serg@serg.mylan committed
3856
        res= TRUE; // cannot happen
serg@serg.mylan's avatar
serg@serg.mylan committed
3857 3858
      else
        send_ok(thd);
3859
      thd->transaction.savepoints=sv->prev;
serg@serg.mylan's avatar
serg@serg.mylan committed
3860
    }
3861
    else
serg@serg.mylan's avatar
serg@serg.mylan committed
3862
      my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
3863
    break;
serg@serg.mylan's avatar
serg@serg.mylan committed
3864
  }
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3865
  case SQLCOM_ROLLBACK_TO_SAVEPOINT:
serg@serg.mylan's avatar
serg@serg.mylan committed
3866
  {
3867 3868
    SAVEPOINT *sv;
    for (sv=thd->transaction.savepoints; sv; sv=sv->prev)
3869 3870 3871
    {
      if (my_strnncoll(system_charset_info,
                       (uchar *)lex->ident.str, lex->ident.length,
3872
                       (uchar *)sv->name, sv->length) == 0)
3873 3874
        break;
    }
3875
    if (sv)
3876
    {
3877
      if (ha_rollback_to_savepoint(thd, sv))
3878 3879
        res= TRUE; // cannot happen
      else
serg@serg.mylan's avatar
serg@serg.mylan committed
3880 3881 3882 3883 3884 3885 3886 3887
      {
        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);
      }
3888
      thd->transaction.savepoints=sv;
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3889 3890
    }
    else
3891
      my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3892
    break;
3893
  }
3894
  case SQLCOM_SAVEPOINT:
3895 3896
    if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) ||
        !opt_using_transactions)
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
3897
      send_ok(thd);
heikki@hundin.mysql.fi's avatar
heikki@hundin.mysql.fi committed
3898
    else
3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936
    {
      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);
      }
    }
3937
    break;
3938 3939
  case SQLCOM_CREATE_PROCEDURE:
  case SQLCOM_CREATE_SPFUNCTION:
monty@mysql.com's avatar
monty@mysql.com committed
3940
  {
3941
    uint namelen;
3942
    char *name, *db;
3943
    int result;
3944

3945
    DBUG_ASSERT(lex->sphead != 0);
3946

3947
    if (check_access(thd, CREATE_PROC_ACL, lex->sphead->m_db.str, 0, 0, 0))
3948 3949 3950 3951 3952 3953
    {
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
    }

3954 3955 3956
    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
3957 3958
      lex->sphead->m_db.str= strmake_root(thd->mem_root, thd->db,
                                           lex->sphead->m_db.length);
3959
    }
3960 3961

    name= lex->sphead->name(&namelen);
3962
#ifdef HAVE_DLOPEN
monty@mysql.com's avatar
monty@mysql.com committed
3963 3964 3965
    if (lex->sphead->m_type == TYPE_ENUM_FUNCTION)
    {
      udf_func *udf = find_udf(name, namelen);
3966

monty@mysql.com's avatar
monty@mysql.com committed
3967
      if (udf)
3968
      {
3969
	my_error(ER_UDF_EXISTS, MYF(0), name);
3970
	delete lex->sphead;
3971
	lex->sphead= 0;
3972
	goto error;
3973
      }
monty@mysql.com's avatar
monty@mysql.com committed
3974 3975 3976 3977 3978
    }
#endif
    if (lex->sphead->m_type == TYPE_ENUM_FUNCTION &&
	!lex->sphead->m_has_return)
    {
3979
      my_error(ER_SP_NORETURN, MYF(0), name);
monty@mysql.com's avatar
monty@mysql.com committed
3980
      delete lex->sphead;
3981
      lex->sphead= 0;
monty@mysql.com's avatar
monty@mysql.com committed
3982 3983 3984
      goto error;
    }

3985 3986
    name= thd->strdup(name); 
    db= thd->strmake(lex->sphead->m_db.str, lex->sphead->m_db.length);
3987 3988
    res= (result= lex->sphead->create(thd));
    switch (result) {
monty@mysql.com's avatar
monty@mysql.com committed
3989
    case SP_OK:
3990
      lex->unit.cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
3991 3992
      delete lex->sphead;
      lex->sphead= 0;
3993
#ifndef NO_EMBEDDED_ACCESS_CHECKS
3994
      /* only add privileges if really neccessary */
3995
      if (sp_automatic_privileges && !opt_noacl &&
3996 3997 3998
          check_routine_access(thd, DEFAULT_CREATE_PROC_ACLS,
      			       db, name,
                               lex->sql_command == SQLCOM_CREATE_PROCEDURE, 1))
3999 4000
      {
        close_thread_tables(thd);
4001 4002
        if (sp_grant_privileges(thd, db, name, 
                                lex->sql_command == SQLCOM_CREATE_PROCEDURE))
4003 4004 4005 4006
          push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
	  	       ER_PROC_AUTO_GRANT_FAIL,
		       ER(ER_PROC_AUTO_GRANT_FAIL));
      }
4007
#endif
4008
      send_ok(thd);
4009
      break;
monty@mysql.com's avatar
monty@mysql.com committed
4010
    case SP_WRITE_ROW_FAILED:
4011
      my_error(ER_SP_ALREADY_EXISTS, MYF(0), SP_TYPE_STRING(lex), name);
4012
      lex->unit.cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
4013 4014 4015
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
4016
    case SP_NO_DB_ERROR:
4017
      my_error(ER_BAD_DB_ERROR, MYF(0), lex->sphead->m_db.str);
4018
      lex->unit.cleanup();
4019 4020 4021
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
monty@mysql.com's avatar
monty@mysql.com committed
4022
    default:
4023
      my_error(ER_SP_STORE_FAILED, MYF(0), SP_TYPE_STRING(lex), name);
4024
      lex->unit.cleanup();
monty@mysql.com's avatar
monty@mysql.com committed
4025 4026 4027
      delete lex->sphead;
      lex->sphead= 0;
      goto error;
4028
    }
monty@mysql.com's avatar
monty@mysql.com committed
4029 4030
    break;
  }
4031 4032 4033 4034
  case SQLCOM_CALL:
    {
      sp_head *sp;

4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048
      /*
        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;

      /*
        By this moment all needed SPs should be in cache so no need
        to look into DB. Moreover we may be unable to do it becuase
        we may don't have read lock on mysql.proc
      */
      if (!(sp= sp_find_procedure(thd, lex->spname, TRUE)))
4049
      {
4050
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "PROCEDURE",
4051
                 lex->spname->m_qname.str);
4052
	goto error;
4053 4054 4055
      }
      else
      {
4056
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4057
	st_sp_security_context save_ctx;
4058
#endif
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4059
	ha_rows select_limit;
monty@mysql.com's avatar
monty@mysql.com committed
4060 4061
        /* bits that should be cleared in thd->server_status */
	uint bits_to_be_cleared= 0;
4062

4063
#ifndef EMBEDDED_LIBRARY
4064 4065
	my_bool nsok= thd->net.no_send_ok;
	thd->net.no_send_ok= TRUE;
4066
#endif
4067
	if (sp->m_multi_results)
4068
	{
4069
	  if (! (thd->client_capabilities & CLIENT_MULTI_RESULTS))
4070
	  {
4071
	    my_error(ER_SP_BADSELECT, MYF(0), sp->m_qname.str);
4072 4073 4074 4075 4076
#ifndef EMBEDDED_LIBRARY
	    thd->net.no_send_ok= nsok;
#endif
	    goto error;
	  }
monty@mysql.com's avatar
monty@mysql.com committed
4077 4078 4079 4080 4081 4082 4083
          /*
            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;
4084 4085
	}

4086
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4087 4088
	if (check_routine_access(thd, EXECUTE_ACL, 
				 sp->m_db.str, sp->m_name.str, TRUE, 0))
4089 4090 4091 4092 4093 4094
	{
#ifndef EMBEDDED_LIBRARY
	  thd->net.no_send_ok= nsok;
#endif
	  goto error;
	}
4095
	sp_change_security_context(thd, sp, &save_ctx);
4096
	if (save_ctx.changed && 
4097 4098
	    check_routine_access(thd, EXECUTE_ACL, 
				   sp->m_db.str, sp->m_name.str, TRUE, 0))
4099 4100 4101 4102 4103 4104 4105 4106
	{
#ifndef EMBEDDED_LIBRARY
	  thd->net.no_send_ok= nsok;
#endif
	  sp_restore_security_context(thd, sp, &save_ctx);
	  goto error;
	}

4107
#endif
pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4108 4109
	select_limit= thd->variables.select_limit;
	thd->variables.select_limit= HA_POS_ERROR;
4110

4111
	thd->row_count_func= 0;
4112
        tmp_disable_binlog(thd); /* don't binlog the substatements */
4113
	res= sp->execute_procedure(thd, &lex->value_list);
4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148
        reenable_binlog(thd);

        /*
          We write CALL to binlog; on the opposite we didn't write the
          substatements. That choice is necessary because the substatements
          may use local vars.
          Binlogging should happen when all tables are locked. They are locked
          just above, and unlocked by close_thread_tables(). All tables which
          are to be updated are locked like with a table-level write lock, and
          this also applies to InnoDB (I tested - note that it reduces
          InnoDB's concurrency as we don't use row-level locks). So binlogging
          below is safe.
          Note the limitation: if the SP returned an error, but still did some
          updates, we do NOT binlog it. This is because otherwise "permission
          denied", "table does not exist" etc would stop the slave quite
          often. There is no easy way to know if the SP updated something
          (even no_trans_update is not suitable, as it may be a transactional
          autocommit update which happened, and no_trans_update covers only
          INSERT/UPDATE/LOAD).
        */
        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();
            Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
            mysql_bin_log.write(&qinfo);
          }
        }
4149

4150 4151 4152
	/*
          If warnings have been cleared, we have to clear total_warn_count
          too, otherwise the clients get confused.
4153 4154 4155 4156
	 */
	if (thd->warn_list.is_empty())
	  thd->total_warn_count= 0;

pem@mysql.comhem.se's avatar
pem@mysql.comhem.se committed
4157
	thd->variables.select_limit= select_limit;
4158
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4159
	sp_restore_security_context(thd, sp, &save_ctx);
4160
#endif
4161

4162
#ifndef EMBEDDED_LIBRARY
4163
	thd->net.no_send_ok= nsok;
4164
#endif
monty@mysql.com's avatar
monty@mysql.com committed
4165
        thd->server_status&= ~bits_to_be_cleared;
4166

4167
	if (!res)
monty@mysql.com's avatar
monty@mysql.com committed
4168 4169
	  send_ok(thd, (ulong) (thd->row_count_func < 0 ? 0 :
                                thd->row_count_func));
4170 4171
	else
	  goto error;		// Substatement should already have sent error
4172
      }
4173
      break;
4174 4175
    }
  case SQLCOM_ALTER_PROCEDURE:
4176
  case SQLCOM_ALTER_FUNCTION:
4177
    {
4178
      int result;
4179 4180 4181 4182
      sp_head *sp;
      st_sp_chistics chistics;

      memcpy(&chistics, &lex->sp_chistics, sizeof(chistics));
4183
      if (lex->sql_command == SQLCOM_ALTER_PROCEDURE)
4184
	sp= sp_find_procedure(thd, lex->spname);
4185
      else
4186
	sp= sp_find_function(thd, lex->spname);
monty@mysql.com's avatar
monty@mysql.com committed
4187
      mysql_reset_errors(thd, 0);
4188
      if (! sp)
4189 4190 4191 4192 4193 4194 4195 4196 4197
      {
	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;
	}
      }
4198 4199
      else
      {
4200 4201 4202
        if (check_routine_access(thd, ALTER_PROC_ACL, sp->m_db.str, 
				 sp->m_name.str,
                                 lex->sql_command == SQLCOM_ALTER_PROCEDURE, 0))
4203
	  goto error;
4204
	memcpy(&lex->sp_chistics, &chistics, sizeof(lex->sp_chistics));
4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220
        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);
        }
4221
      }
4222
      switch (result)
4223
      {
4224
      case SP_OK:
4225 4226 4227 4228 4229 4230
        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);
        }
4231
	send_ok(thd);
4232 4233
	break;
      case SP_KEY_NOT_FOUND:
4234 4235
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4236 4237
	goto error;
      default:
4238 4239
	my_error(ER_SP_CANT_ALTER, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4240
	goto error;
4241
      }
4242
      break;
4243 4244
    }
  case SQLCOM_DROP_PROCEDURE:
4245
  case SQLCOM_DROP_FUNCTION:
4246
    {
4247
      sp_head *sp;
4248
      int result;
4249
      char *db, *name;
4250

4251
      if (lex->sql_command == SQLCOM_DROP_PROCEDURE)
4252 4253 4254
	sp= sp_find_procedure(thd, lex->spname);
      else
	sp= sp_find_function(thd, lex->spname);
monty@mysql.com's avatar
monty@mysql.com committed
4255
      mysql_reset_errors(thd, 0);
4256
      if (sp)
4257
      {
4258 4259
        db= thd->strdup(sp->m_db.str);
	name= thd->strdup(sp->m_name.str);
4260 4261
	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
4262
          goto error;
4263
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4264
	if (sp_automatic_privileges && !opt_noacl &&
4265 4266
	    sp_revoke_privileges(thd, db, name, 
                                 lex->sql_command == SQLCOM_DROP_PROCEDURE))
4267 4268 4269 4270 4271
	{
	  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
		       ER_PROC_AUTO_REVOKE_FAIL,
		       ER(ER_PROC_AUTO_REVOKE_FAIL));
	}
4272
#endif
4273
	if (lex->sql_command == SQLCOM_DROP_PROCEDURE)
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
4274
	  result= sp_drop_procedure(thd, lex->spname);
4275
	else
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
4276
	  result= sp_drop_function(thd, lex->spname);
4277 4278 4279
      }
      else
      {
4280
#ifdef HAVE_DLOPEN
4281 4282 4283 4284 4285 4286 4287 4288 4289
	if (lex->sql_command == SQLCOM_DROP_FUNCTION)
	{
          udf_func *udf = find_udf(lex->spname->m_name.str,
                                   lex->spname->m_name.length);
          if (udf)
          {
	    if (check_access(thd, DELETE_ACL, "mysql", 0, 1, 0))
	      goto error;
	    if (!(res = mysql_drop_function(thd, &lex->spname->m_name)))
4290
	    {
4291 4292
	      send_ok(thd);
	      break;
4293 4294
	    }
	  }
4295
	}
4296
#endif
4297 4298 4299 4300 4301 4302 4303
	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;
	}
4304
      }
4305 4306
      res= result;
      switch (result)
4307 4308
      {
      case SP_OK:
4309 4310 4311 4312 4313 4314
        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);
        }
4315
	send_ok(thd);
4316 4317
	break;
      case SP_KEY_NOT_FOUND:
4318 4319
	if (lex->drop_if_exists)
	{
4320
	  push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
4321
			      ER_SP_DOES_NOT_EXIST, ER(ER_SP_DOES_NOT_EXIST),
4322
			      SP_COM_STRING(lex), lex->spname->m_name.str);
4323
	  res= FALSE;
4324 4325 4326
	  send_ok(thd);
	  break;
	}
4327 4328
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4329 4330
	goto error;
      default:
4331 4332
	my_error(ER_SP_DROP_FAILED, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_qname.str);
4333
	goto error;
4334
      }
4335
      break;
4336
    }
4337 4338
  case SQLCOM_SHOW_CREATE_PROC:
    {
4339
      if (lex->spname->m_name.length > NAME_LEN)
4340
      {
4341
	my_error(ER_TOO_LONG_IDENT, MYF(0), lex->spname->m_name.str);
4342 4343
	goto error;
      }
4344
      if (sp_show_create_procedure(thd, lex->spname) != SP_OK)
4345
      {			/* We don't distinguish between errors for now */
4346 4347
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_name.str);
4348 4349 4350 4351 4352 4353
	goto error;
      }
      break;
    }
  case SQLCOM_SHOW_CREATE_FUNC:
    {
4354
      if (lex->spname->m_name.length > NAME_LEN)
4355
      {
4356
	my_error(ER_TOO_LONG_IDENT, MYF(0), lex->spname->m_name.str);
4357 4358
	goto error;
      }
4359
      if (sp_show_create_function(thd, lex->spname) != SP_OK)
4360
      {			/* We don't distinguish between errors for now */
4361 4362
	my_error(ER_SP_DOES_NOT_EXIST, MYF(0),
                 SP_COM_STRING(lex), lex->spname->m_name.str);
4363 4364 4365 4366 4367 4368
	goto error;
      }
      break;
    }
  case SQLCOM_SHOW_STATUS_PROC:
    {
4369
      res= sp_show_status_procedure(thd, (lex->wild ?
4370 4371 4372 4373 4374
					  lex->wild->ptr() : NullS));
      break;
    }
  case SQLCOM_SHOW_STATUS_FUNC:
    {
4375
      res= sp_show_status_function(thd, (lex->wild ? 
4376 4377 4378
					 lex->wild->ptr() : NullS));
      break;
    }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4379 4380
  case SQLCOM_CREATE_VIEW:
    {
4381 4382 4383
      if (!(res= mysql_create_view(thd, thd->lex->create_view_mode)) &&
          mysql_bin_log.is_open())
      {
4384
        thd->clear_error();
4385 4386 4387
        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
4388 4389 4390 4391
      break;
    }
  case SQLCOM_DROP_VIEW:
    {
4392 4393 4394
      if (check_table_access(thd, DROP_ACL, all_tables, 0) ||
          end_active_trans(thd))
        goto error;
4395 4396 4397
      if (!(res= mysql_drop_view(thd, first_table, thd->lex->drop_mode)) &&
          mysql_bin_log.is_open())
      {
4398
        thd->clear_error();
4399 4400 4401
        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
4402 4403
      break;
    }
4404 4405
  case SQLCOM_CREATE_TRIGGER:
  {
4406 4407 4408
    res= mysql_create_or_drop_trigger(thd, all_tables, 1);

    /* We don't care about trigger body after this point */
4409 4410 4411 4412 4413 4414 4415 4416 4417
    delete lex->sphead;
    lex->sphead= 0;
    break;
  }
  case SQLCOM_DROP_TRIGGER:
  {
    res= mysql_create_or_drop_trigger(thd, all_tables, 0);
    break;
  }
4418 4419 4420
  case SQLCOM_XA_START:
    if (thd->transaction.xa_state == XA_IDLE && thd->lex->xa_opt == XA_RESUME)
    {
serg@serg.mylan's avatar
serg@serg.mylan committed
4421
      if (! thd->transaction.xid.eq(thd->lex->xid))
4422 4423 4424 4425 4426 4427 4428 4429
      {
        my_error(ER_XAER_NOTA, MYF(0));
        break;
      }
      thd->transaction.xa_state=XA_ACTIVE;
      send_ok(thd);
      break;
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
4430
    if (thd->lex->xa_opt != XA_NONE)
4431 4432 4433 4434 4435 4436
    { // JOIN is not supported yet. TODO
      my_error(ER_XAER_INVAL, MYF(0));
      break;
    }
    if (thd->transaction.xa_state != XA_NOTR)
    {
4437 4438
      my_error(ER_XAER_RMFAIL, MYF(0),
               xa_state_names[thd->transaction.xa_state]);
4439 4440 4441 4442 4443 4444 4445 4446 4447
      break;
    }
    if (thd->active_transaction() || thd->locked_tables)
    {
      my_error(ER_XAER_OUTSIDE, MYF(0));
      break;
    }
    DBUG_ASSERT(thd->transaction.xid.is_null());
    thd->transaction.xa_state=XA_ACTIVE;
serg@serg.mylan's avatar
serg@serg.mylan committed
4448
    thd->transaction.xid.set(thd->lex->xid);
4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462
    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;
    }
    if (thd->transaction.xa_state != XA_ACTIVE)
    {
4463 4464
      my_error(ER_XAER_RMFAIL, MYF(0),
               xa_state_names[thd->transaction.xa_state]);
4465 4466
      break;
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
4467
    if (!thd->transaction.xid.eq(thd->lex->xid))
4468 4469 4470 4471 4472 4473 4474 4475 4476 4477
    {
      my_error(ER_XAER_NOTA, MYF(0));
      break;
    }
    thd->transaction.xa_state=XA_IDLE;
    send_ok(thd);
    break;
  case SQLCOM_XA_PREPARE:
    if (thd->transaction.xa_state != XA_IDLE)
    {
4478 4479
      my_error(ER_XAER_RMFAIL, MYF(0),
               xa_state_names[thd->transaction.xa_state]);
4480 4481
      break;
    }
serg@serg.mylan's avatar
serg@serg.mylan committed
4482
    if (!thd->transaction.xid.eq(thd->lex->xid))
4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496
    {
      my_error(ER_XAER_NOTA, MYF(0));
      break;
    }
    if (ha_prepare(thd))
    {
      my_error(ER_XA_RBROLLBACK, MYF(0));
      thd->transaction.xa_state=XA_NOTR;
      break;
    }
    thd->transaction.xa_state=XA_PREPARED;
    send_ok(thd);
    break;
  case SQLCOM_XA_COMMIT:
serg@serg.mylan's avatar
serg@serg.mylan committed
4497
    if (!thd->transaction.xid.eq(thd->lex->xid))
4498
    {
serg@serg.mylan's avatar
serg@serg.mylan committed
4499
      if (!(res= !ha_commit_or_rollback_by_xid(thd->lex->xid, 1)))
4500
        my_error(ER_XAER_NOTA, MYF(0));
serg@serg.mylan's avatar
serg@serg.mylan committed
4501 4502
      else
        send_ok(thd);
4503 4504 4505 4506
      break;
    }
    if (thd->transaction.xa_state == XA_IDLE && thd->lex->xa_opt == XA_ONE_PHASE)
    {
4507 4508 4509
      int r;
      if ((r= ha_commit(thd)))
        my_error(r == 1 ? ER_XA_RBROLLBACK : ER_XAER_RMERR, MYF(0));
4510 4511 4512 4513 4514 4515
      else
        send_ok(thd);
    }
    else
    if (thd->transaction.xa_state == XA_PREPARED && thd->lex->xa_opt == XA_NONE)
    {
4516 4517 4518
      if (wait_if_global_read_lock(thd, 0, 0))
      {
        ha_rollback(thd);
4519
        my_error(ER_XAER_RMERR, MYF(0));
4520
      }
4521
      else
4522 4523 4524 4525 4526 4527 4528
      {
        if (ha_commit_one_phase(thd, 1))
          my_error(ER_XAER_RMERR, MYF(0));
        else
          send_ok(thd);
        start_waiting_global_read_lock(thd);
      }
4529 4530 4531
    }
    else
    {
4532 4533
      my_error(ER_XAER_RMFAIL, MYF(0),
               xa_state_names[thd->transaction.xa_state]);
4534 4535 4536 4537 4538 4539 4540
      break;
    }
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
    thd->transaction.xa_state=XA_NOTR;
    break;
  case SQLCOM_XA_ROLLBACK:
serg@serg.mylan's avatar
serg@serg.mylan committed
4541
    if (!thd->transaction.xid.eq(thd->lex->xid))
4542
    {
serg@serg.mylan's avatar
serg@serg.mylan committed
4543
      if (!(res= !ha_commit_or_rollback_by_xid(thd->lex->xid, 0)))
4544
        my_error(ER_XAER_NOTA, MYF(0));
serg@serg.mylan's avatar
serg@serg.mylan committed
4545 4546
      else
        send_ok(thd);
4547 4548 4549 4550 4551
      break;
    }
    if (thd->transaction.xa_state != XA_IDLE &&
        thd->transaction.xa_state != XA_PREPARED)
    {
4552 4553
      my_error(ER_XAER_RMFAIL, MYF(0),
               xa_state_names[thd->transaction.xa_state]);
4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564
      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;
    thd->transaction.xa_state=XA_NOTR;
    break;
  case SQLCOM_XA_RECOVER:
4565
    res= mysql_xa_recover(thd);
4566 4567 4568
    break;
  default:
    DBUG_ASSERT(0);                             /* Impossible */
4569
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4570 4571
    break;
  }
monty@mysql.com's avatar
monty@mysql.com committed
4572
  thd->proc_info="query end";
4573
  /* Two binlog-related cleanups: */
4574
  if (thd->one_shot_set)
monty@mysql.com's avatar
monty@mysql.com committed
4575 4576 4577 4578 4579 4580 4581 4582
  {
    /*
      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 (lex->sql_command != SQLCOM_SET_OPTION)
4583
    {
monty@mysql.com's avatar
monty@mysql.com committed
4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595
      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;
4596
    }
monty@mysql.com's avatar
monty@mysql.com committed
4597
  }
4598

4599 4600 4601 4602 4603
  /*
    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.
   */
4604
  if (lex->sql_command != SQLCOM_CALL && uc_update_queries[lex->sql_command]<2)
4605
    thd->row_count_func= -1;
4606
  goto cleanup;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4607 4608

error:
4609
  res= 1;
4610

4611
cleanup:
4612 4613 4614 4615 4616 4617 4618 4619
  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;
  }
4620
  DBUG_RETURN(res || thd->net.report_error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4621 4622 4623
}


bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4624 4625
/*
  Check grants for commands which work only with one table and all other
4626
  tables belonging to subselects or implicitly opened tables.
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4627

4628
  SYNOPSIS
monty@mysql.com's avatar
monty@mysql.com committed
4629 4630
    check_one_table_access()
    thd			Thread handler
4631
    privilege		requested privilege
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4632
    all_tables		global table list of query
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4633 4634 4635

  RETURN
    0 - OK
monty@mysql.com's avatar
monty@mysql.com committed
4636
    1 - access denied, error is sent to client
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4637 4638
*/

4639
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
4640
{
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4641 4642
  if (check_access(thd, privilege, all_tables->db,
		   &all_tables->grant.privilege, 0, 0))
monty@mysql.com's avatar
monty@mysql.com committed
4643
    return 1;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4644

4645
  /* Show only 1 table for check_grant */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4646
  if (grant_option && check_grant(thd, privilege, all_tables, 0, 1, 0))
monty@mysql.com's avatar
monty@mysql.com committed
4647
    return 1;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4648

4649
  /* Check rights on tables of subselects and implictly opened tables */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4650
  TABLE_LIST *subselects_tables;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4651
  if ((subselects_tables= all_tables->next_global))
monty@mysql.com's avatar
monty@mysql.com committed
4652
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4653
    if ((check_table_access(thd, SELECT_ACL, subselects_tables, 0)))
monty@mysql.com's avatar
monty@mysql.com committed
4654 4655 4656
      return 1;
  }
  return 0;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4657 4658 4659
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
4660
/****************************************************************************
4661
  Get the user (global) and database privileges for all used tables
4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674

  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
4675 4676
                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
4677 4678 4679
****************************************************************************/

bool
4680
check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
4681
	     bool dont_check_global_grants, bool no_errors)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4682
{
4683 4684
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  ulong db_access;
4685
  bool  db_is_pattern= test(want_access & GRANT_ACL);
4686 4687
#endif
  ulong dummy;
4688 4689 4690
  DBUG_ENTER("check_access");
  DBUG_PRINT("enter",("db: %s  want_access: %lu  master_access: %lu",
                      db ? db : "", want_access, thd->master_access));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4691 4692 4693 4694 4695
  if (save_priv)
    *save_priv=0;
  else
    save_priv= &dummy;

4696
  if ((!db || !db[0]) && !thd->db && !dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4697
  {
4698
    DBUG_PRINT("error",("No database"));
4699
    if (!no_errors)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4700 4701
      my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR),
                 MYF(0));                       /* purecov: tested */
4702
    DBUG_RETURN(TRUE);				/* purecov: tested */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4703 4704
  }

monty@mysql.com's avatar
monty@mysql.com committed
4705 4706 4707
#ifdef NO_EMBEDDED_ACCESS_CHECKS
  DBUG_RETURN(0);
#else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4708 4709
  if ((thd->master_access & want_access) == want_access)
  {
4710 4711 4712 4713 4714 4715 4716
    /*
      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
    */
    db_access= thd->db_access;
    if (!(thd->master_access & SELECT_ACL) &&
4717
	(db && (!thd->db || db_is_pattern || strcmp(db,thd->db))))
serg@serg.mylan's avatar
serg@serg.mylan committed
4718
      db_access=acl_get(thd->host, thd->ip, thd->priv_user, db, db_is_pattern);
4719
    *save_priv=thd->master_access | db_access;
4720
    DBUG_RETURN(FALSE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4721
  }
4722
  if (((want_access & ~thd->master_access) & ~(DB_ACLS | EXTRA_ACL)) ||
4723
      ! db && dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4724
  {						// We can never grant this
4725
    DBUG_PRINT("error",("No possible access"));
4726
    if (!no_errors)
4727 4728 4729 4730 4731 4732
      my_error(ER_ACCESS_DENIED_ERROR, MYF(0),
               thd->priv_user,
               thd->priv_host,
               (thd->password ?
                ER(ER_YES) :
                ER(ER_NO)));                    /* purecov: tested */
4733
    DBUG_RETURN(TRUE);				/* purecov: tested */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4734 4735 4736
  }

  if (db == any_db)
4737
    DBUG_RETURN(FALSE);				// Allow select on anything
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
4738

4739
  if (db && (!thd->db || db_is_pattern || strcmp(db,thd->db)))
serg@serg.mylan's avatar
serg@serg.mylan committed
4740
    db_access=acl_get(thd->host, thd->ip, thd->priv_user, db, db_is_pattern);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4741 4742
  else
    db_access=thd->db_access;
4743
  DBUG_PRINT("info",("db_access: %lu", db_access));
monty@mysql.com's avatar
monty@mysql.com committed
4744
  /* Remove SHOW attribute and access rights we already have */
4745
  want_access &= ~(thd->master_access | EXTRA_ACL);
4746 4747
  DBUG_PRINT("info",("db_access: %lu  want_access: %lu",
                     db_access, want_access));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4748
  db_access= ((*save_priv=(db_access | thd->master_access)) & want_access);
4749 4750

  /* grant_option is set if there exists a single table or column grant */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4751
  if (db_access == want_access ||
4752
      (grant_option && !dont_check_global_grants &&
4753
       !(want_access & ~(db_access | TABLE_ACLS | PROC_ACLS))))
4754
    DBUG_RETURN(FALSE);				/* Ok */
4755 4756

  DBUG_PRINT("error",("Access denied"));
4757
  if (!no_errors)
4758 4759 4760 4761 4762 4763
    my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
             thd->priv_user,
             thd->priv_host,
             (db ? db : (thd->db ?
                         thd->db :
                         "unknown")));          /* purecov: tested */
4764
  DBUG_RETURN(TRUE);				/* purecov: tested */
monty@mysql.com's avatar
monty@mysql.com committed
4765
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4766 4767 4768
}


4769 4770 4771 4772 4773 4774 4775 4776 4777
/*
  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
4778
    One gets access right if one has ANY of the rights in want_access
4779 4780 4781 4782 4783 4784 4785 4786
    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
*/
4787 4788

bool check_global_access(THD *thd, ulong want_access)
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
4789
{
monty@mysql.com's avatar
monty@mysql.com committed
4790 4791 4792
#ifdef NO_EMBEDDED_ACCESS_CHECKS
  return 0;
#else
4793
  char command[128];
4794
  if ((thd->master_access & want_access))
4795 4796
    return 0;
  get_privilege_desc(command, sizeof(command), want_access);
4797
  my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), command);
4798
  return 1;
monty@mysql.com's avatar
monty@mysql.com committed
4799
#endif /* NO_EMBEDDED_ACCESS_CHECKS */
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
4800 4801 4802
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
4803
/*
4804 4805
  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
4806 4807
*/

4808
bool
4809
check_table_access(THD *thd, ulong want_access,TABLE_LIST *tables,
4810
		   bool no_errors)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4811
{
4812 4813
  uint found=0;
  ulong found_access=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4814
  TABLE_LIST *org_tables=tables;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4815
  for (; tables; tables= tables->next_global)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4816
  {
4817
    if (tables->derived || tables->schema_table || tables->belong_to_view ||
4818
        (tables->table && (int)tables->table->s->tmp_table) ||
4819 4820
        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
4821
      continue;
4822 4823
    if ((thd->master_access & want_access) == (want_access & ~EXTRA_ACL) &&
	thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4824
      tables->grant.privilege= want_access;
4825
    else if (tables->db && tables->db == thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4826 4827 4828 4829 4830
    {
      if (found && !grant_option)		// db already checked
	tables->grant.privilege=found_access;
      else
      {
4831 4832
	if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
			 0, no_errors))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4833 4834
	  return TRUE;				// Access denied
	found_access=tables->grant.privilege;
4835
	found=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4836 4837
      }
    }
4838
    else if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
4839
			  0, no_errors))
4840
      return TRUE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4841 4842
  }
  if (grant_option)
4843
    return check_grant(thd,want_access & ~EXTRA_ACL,org_tables,
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4844
		       test(want_access & EXTRA_ACL), UINT_MAX, no_errors);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4845 4846 4847
  return FALSE;
}

4848

4849
bool
4850 4851
check_routine_access(THD *thd, ulong want_access,char *db, char *name,
		     bool is_proc, bool no_errors)
4852 4853 4854 4855 4856
{
  TABLE_LIST tables[1];
  
  bzero((char *)tables, sizeof(TABLE_LIST));
  tables->db= db;
4857
  tables->table_name= tables->alias= name;
4858 4859 4860 4861 4862 4863 4864
  
  if ((thd->master_access & want_access) == want_access && !thd->db)
    tables->grant.privilege= want_access;
  else if (check_access(thd,want_access,db,&tables->grant.privilege,
			0, no_errors))
    return TRUE;
  
4865
#ifndef NO_EMBEDDED_ACCESS_CHECKS
4866
  if (grant_option)
4867
    return check_grant_routine(thd, want_access, tables, is_proc, no_errors);
4868
#endif
4869 4870 4871 4872

  return FALSE;
}

4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887

/*
  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
*/

4888 4889
bool check_some_routine_access(THD *thd, const char *db, const char *name,
                               bool is_proc)
4890 4891 4892 4893 4894 4895 4896
{
  ulong save_priv;
  if (thd->master_access & SHOW_PROC_ACLS)
    return FALSE;
  if (!check_access(thd, SHOW_PROC_ACLS, db, &save_priv, 0, 1) ||
      (save_priv & SHOW_PROC_ACLS))
    return FALSE;
4897
  return check_routine_level_acl(thd, db, name, is_proc);
4898 4899 4900
}


4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935
/*
  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,
                        &table->grant.privilege, 0, 1) &&
          !grant_option || !check_grant(thd, access, table, 0, 1, 1))
        DBUG_RETURN(0);
    }
  }
  DBUG_PRINT("exit",("no matching access rights"));
  DBUG_RETURN(1);
}


4936 4937
bool check_merge_table_access(THD *thd, char *db,
			      TABLE_LIST *table_list)
4938 4939 4940 4941
{
  int error=0;
  if (table_list)
  {
4942
    /* Check that all tables use the current database */
4943
    TABLE_LIST *tmp;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4944
    for (tmp= table_list; tmp; tmp= tmp->next_local)
4945 4946 4947 4948
    {
      if (!tmp->db || !tmp->db[0])
	tmp->db=db;
    }
4949
    error=check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
hf@deer.(none)'s avatar
hf@deer.(none) committed
4950
			     table_list,0);
4951 4952 4953 4954
  }
  return error;
}

hf@deer.(none)'s avatar
hf@deer.(none) committed
4955 4956 4957

static bool check_db_used(THD *thd,TABLE_LIST *tables)
{
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
4958
  for (; tables; tables= tables->next_global)
hf@deer.(none)'s avatar
hf@deer.(none) committed
4959 4960 4961 4962 4963
  {
    if (!tables->db)
    {
      if (!(tables->db=thd->db))
      {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
4964 4965
	my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR),
                   MYF(0));                     /* purecov: tested */
hf@deer.(none)'s avatar
hf@deer.(none) committed
4966 4967 4968 4969 4970 4971
	return TRUE;				/* purecov: tested */
      }
    }
  }
  return FALSE;
}
4972

4973

bk@work.mysql.com's avatar
bk@work.mysql.com committed
4974 4975 4976 4977 4978 4979 4980 4981 4982 4983
/****************************************************************************
	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
4984 4985 4986 4987
#ifndef DBUG_OFF
long max_stack_used;
#endif

4988
#ifndef EMBEDDED_LIBRARY
4989
bool check_stack_overrun(THD *thd, long margin)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4990 4991 4992
{
  long stack_used;
  if ((stack_used=used_stack(thd->thread_stack,(char*) &stack_used)) >=
4993
      thread_stack - margin)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4994 4995 4996
  {
    sprintf(errbuff[0],ER(ER_STACK_OVERRUN),stack_used,thread_stack);
    my_message(ER_STACK_OVERRUN,errbuff[0],MYF(0));
4997
    thd->fatal_error();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
4998 4999
    return 1;
  }
monty@mysql.com's avatar
monty@mysql.com committed
5000 5001 5002
#ifndef DBUG_OFF
  max_stack_used= max(max_stack_used, stack_used);
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5003 5004
  return 0;
}
5005
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5006 5007 5008 5009

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

5010
bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, ulong *yystacksize)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5011 5012
{
  LEX	*lex=current_lex;
5013
  ulong old_info=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039
  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;
}


/****************************************************************************
5040
  Initialize global thd variables needed for query
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5041 5042
****************************************************************************/

5043
void
5044
mysql_init_query(THD *thd, uchar *buf, uint length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5045 5046
{
  DBUG_ENTER("mysql_init_query");
5047
  lex_start(thd, buf, length);
5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068
  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");
5069
  thd->free_list= 0;
5070
  thd->select_number= 1;
monty@mysql.com's avatar
monty@mysql.com committed
5071
  thd->total_warn_count=0;			// Warnings for this query
5072 5073
  thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
  thd->sent_row_count= thd->examined_row_count= 0;
5074
  thd->is_fatal_error= thd->rand_used= thd->time_zone_used= 0;
monty@mysql.com's avatar
monty@mysql.com committed
5075
  thd->server_status&= ~ (SERVER_MORE_RESULTS_EXISTS | 
monty@mysql.com's avatar
monty@mysql.com committed
5076 5077
                          SERVER_QUERY_NO_INDEX_USED |
                          SERVER_QUERY_NO_GOOD_INDEX_USED);
5078
  thd->tmp_table_used= 0;
5079 5080
  if (opt_bin_log)
    reset_dynamic(&thd->user_var_events);
5081
  thd->clear_error();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5082 5083 5084
  DBUG_VOID_RETURN;
}

5085

5086 5087 5088
void
mysql_init_select(LEX *lex)
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5089
  SELECT_LEX *select_lex= lex->current_select;
5090
  select_lex->init_select();
5091
  select_lex->select_limit= HA_POS_ERROR;
5092 5093
  lex->orig_sql_command= SQLCOM_END;
  lex->wild= 0;
5094 5095
  if (select_lex == &lex->select_lex)
  {
5096
    DBUG_ASSERT(lex->result == 0);
5097 5098
    lex->exchange= 0;
  }
5099 5100
}

5101

5102
bool
5103
mysql_new_select(LEX *lex, bool move_down)
5104
{
5105
  SELECT_LEX *select_lex;
5106 5107
  DBUG_ENTER("mysql_new_select");

5108
  if (!(select_lex= new(lex->thd->mem_root) SELECT_LEX()))
5109
    DBUG_RETURN(1);
5110
  select_lex->select_number= ++lex->thd->select_number;
5111 5112
  select_lex->init_query();
  select_lex->init_select();
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5113
  select_lex->parent_lex= lex;
5114 5115
  if (move_down)
  {
5116
    SELECT_LEX_UNIT *unit;
5117
    lex->subqueries= TRUE;
5118
    /* first select_lex of subselect or derived table */
5119
    if (!(unit= new(lex->thd->mem_root) SELECT_LEX_UNIT()))
5120
      DBUG_RETURN(1);
5121

5122 5123
    unit->init_query();
    unit->init_select();
5124
    unit->thd= lex->thd;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5125
    unit->include_down(lex->current_select);
5126 5127
    unit->link_next= 0;
    unit->link_prev= 0;
5128
    unit->return_to= lex->current_select;
5129
    select_lex->include_down(unit);
monty@mysql.com's avatar
monty@mysql.com committed
5130
    /* TODO: assign resolve_mode for fake subquery after merging with new tree */
5131 5132
  }
  else
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5133
  {
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5134 5135
    if (lex->current_select->order_list.first && !lex->current_select->braces)
    {
5136
      my_error(ER_WRONG_USAGE, MYF(0), "UNION", "ORDER BY");
5137
      DBUG_RETURN(1);
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5138
    }
5139
    select_lex->include_neighbour(lex->current_select);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5140 5141 5142 5143 5144 5145 5146 5147
    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
      */
5148
      if (!(fake= unit->fake_select_lex= new(lex->thd->mem_root) SELECT_LEX()))
5149
        DBUG_RETURN(1);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5150 5151 5152 5153 5154
      fake->include_standalone(unit,
			       (SELECT_LEX_NODE**)&unit->fake_select_lex);
      fake->select_number= INT_MAX;
      fake->make_empty_select();
      fake->linkage= GLOBAL_OPTIONS_TYPE;
5155
      fake->select_limit= HA_POS_ERROR;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5156 5157
    }
  }
peter@mysql.com's avatar
peter@mysql.com committed
5158

5159
  select_lex->master_unit()->global_parameters= select_lex;
5160
  select_lex->include_global((st_select_lex_node**)&lex->all_selects_list);
5161
  lex->current_select= select_lex;
5162
  select_lex->resolve_mode= SELECT_LEX::SELECT_MODE;
5163
  DBUG_RETURN(0);
5164
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5165

5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180
/*
  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)
{
5181
  THD *thd;
5182
  LEX *lex;
5183
  LEX_STRING tmp, null_lex_string;
5184
  DBUG_ENTER("create_select_for_variable");
5185 5186

  thd= current_thd;
pem@mysql.telia.com's avatar
pem@mysql.telia.com committed
5187
  lex= thd->lex;
5188 5189 5190 5191
  mysql_init_select(lex);
  lex->sql_command= SQLCOM_SELECT;
  tmp.str= (char*) var_name;
  tmp.length=strlen(var_name);
5192 5193 5194
  bzero((char*) &null_lex_string.str, sizeof(null_lex_string));
  add_item_to_list(thd, get_system_var(thd, OPT_SESSION, tmp,
				       null_lex_string));
5195 5196 5197
  DBUG_VOID_RETURN;
}

5198

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5199 5200
void mysql_init_multi_delete(LEX *lex)
{
5201
  lex->sql_command=  SQLCOM_DELETE_MULTI;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5202
  mysql_init_select(lex);
5203
  lex->select_lex.select_limit= lex->unit.select_limit_cnt=
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5204
    HA_POS_ERROR;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5205
  lex->select_lex.table_list.save_and_clear(&lex->auxilliary_table_list);
5206
  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
5207 5208
  lex->query_tables= 0;
  lex->query_tables_last= &lex->query_tables;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5209
}
5210

5211

5212 5213 5214 5215
/*
  When you modify mysql_parse(), you may need to mofify
  mysql_test_parse_for_slave() in this same file.
*/
5216

5217
void mysql_parse(THD *thd, char *inBuf, uint length)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5218 5219 5220
{
  DBUG_ENTER("mysql_parse");

5221
  mysql_init_query(thd, (uchar*) inBuf, length);
5222
  if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5223
  {
5224
    LEX *lex= thd->lex;
5225
    if (!yyparse((void *)thd) && ! thd->is_fatal_error)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5226
    {
hf@deer.(none)'s avatar
hf@deer.(none) committed
5227
#ifndef NO_EMBEDDED_ACCESS_CHECKS
5228
      if (mqh_used && thd->user_connect &&
5229
	  check_mqh(thd, lex->sql_command))
5230 5231 5232 5233
      {
	thd->net.error = 0;
      }
      else
hf@deer.(none)'s avatar
hf@deer.(none) committed
5234
#endif
5235
      {
5236
	if (thd->net.report_error)
5237 5238
	{
	  if (thd->lex->sphead)
5239 5240 5241 5242
	  {
	    delete thd->lex->sphead;
	    thd->lex->sphead= NULL;
	  }
5243
	}
5244 5245
	else
	{
5246 5247 5248 5249 5250 5251 5252 5253 5254 5255
          /*
            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
5256 5257
          if (lex->found_semicolon &&
              (thd->query_length= (ulong)(lex->found_semicolon - thd->query)))
5258 5259
            thd->query_length--;
          /* Actually execute the query */
5260
	  mysql_execute_command(thd);
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
5261
	  query_cache_end_of_result(thd);
5262
	}
5263
      }
5264
      lex->unit.cleanup();
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5265 5266
    }
    else
5267 5268
    {
      DBUG_PRINT("info",("Command aborted. Fatal_error: %d",
5269
			 thd->is_fatal_error));
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5270
      query_cache_abort(&thd->net);
5271
      lex->unit.cleanup();
5272
      if (thd->lex->sphead)
5273
      {
monty@mysql.com's avatar
monty@mysql.com committed
5274
	/* Clean up after failed stored procedure/function */
5275 5276 5277
	delete thd->lex->sphead;
	thd->lex->sphead= NULL;
      }
5278
    }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5279
    thd->proc_info="freeing items";
5280
    thd->end_statement();
5281
    thd->cleanup_after_query();
5282
    DBUG_ASSERT(thd->change_list.is_empty());
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5283
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5284 5285 5286 5287
  DBUG_VOID_RETURN;
}


monty@mysql.com's avatar
monty@mysql.com committed
5288
#ifdef HAVE_REPLICATION
5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299
/*
  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)
{
5300
  LEX *lex= thd->lex;
5301
  bool error= 0;
monty@mysql.com's avatar
monty@mysql.com committed
5302
  DBUG_ENTER("mysql_test_parse_for_slave");
5303

5304
  mysql_init_query(thd, (uchar*) inBuf, length);
monty@mysql.com's avatar
monty@mysql.com committed
5305
  if (!yyparse((void*) thd) && ! thd->is_fatal_error &&
5306
      all_tables_not_ok(thd,(TABLE_LIST*) lex->select_lex.table_list.first))
monty@mysql.com's avatar
monty@mysql.com committed
5307
    error= 1;                  /* Ignore question */
5308
  thd->end_statement();
5309
  thd->cleanup_after_query();
monty@mysql.com's avatar
monty@mysql.com committed
5310
  DBUG_RETURN(error);
5311
}
monty@mysql.com's avatar
monty@mysql.com committed
5312
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5313

5314

monty@mysql.com's avatar
monty@mysql.com committed
5315

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5316 5317 5318 5319 5320
/*****************************************************************************
** Store field definition for create
** Return 0 if ok
******************************************************************************/

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5321
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
5322
		       char *length, char *decimals,
5323
		       uint type_modifier,
5324 5325
		       Item *default_value, Item *on_update_value,
                       LEX_STRING *comment,
5326 5327
		       char *change,
                       List<String> *interval_list, CHARSET_INFO *cs,
5328
		       uint uint_geom_type)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5329 5330
{
  register create_field *new_field;
5331
  LEX  *lex= thd->lex;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5332 5333 5334 5335
  DBUG_ENTER("add_field_to_list");

  if (strlen(field_name) > NAME_LEN)
  {
5336
    my_error(ER_TOO_LONG_IDENT, MYF(0), field_name); /* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5337 5338 5339 5340 5341
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  if (type_modifier & PRI_KEY_FLAG)
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
5342
    lex->key_list.push_back(new Key(Key::PRIMARY, NullS, HA_KEY_ALG_UNDEF,
5343
				    0, lex->col_list));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5344 5345 5346 5347 5348
    lex->col_list.empty();
  }
  if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG))
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
5349
    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
5350 5351 5352 5353
				    lex->col_list));
    lex->col_list.empty();
  }

5354
  if (default_value)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5355
  {
5356
    /* 
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5357 5358
      Default value should be literal => basic constants =>
      no need fix_fields()
5359 5360 5361
      
      We allow only one function as part of default value - 
      NOW() as default for TIMESTAMP type.
5362
    */
5363 5364 5365
    if (default_value->type() == Item::FUNC_ITEM && 
        !(((Item_func*)default_value)->functype() == Item_func::NOW_FUNC &&
         type == FIELD_TYPE_TIMESTAMP))
5366
    {
5367
      my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
5368 5369 5370
      DBUG_RETURN(1);
    }
    else if (default_value->type() == Item::NULL_ITEM)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5371
    {
5372
      default_value= 0;
5373 5374 5375
      if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) ==
	  NOT_NULL_FLAG)
      {
5376
	my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
5377 5378 5379 5380 5381
	DBUG_RETURN(1);
      }
    }
    else if (type_modifier & AUTO_INCREMENT_FLAG)
    {
5382
      my_error(ER_INVALID_DEFAULT, MYF(0), field_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5383 5384 5385
      DBUG_RETURN(1);
    }
  }
5386 5387 5388

  if (on_update_value && type != FIELD_TYPE_TIMESTAMP)
  {
5389
    my_error(ER_INVALID_ON_UPDATE, MYF(0), field_name);
5390 5391
    DBUG_RETURN(1);
  }
5392 5393 5394 5395

  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
5396
    DBUG_RETURN(1);
5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423

  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
5424 5425
  new_field->field=0;
  new_field->field_name=field_name;
5426
  new_field->def= default_value;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5427 5428 5429 5430 5431 5432 5433 5434 5435
  new_field->flags= type_modifier;
  new_field->unireg_check= (type_modifier & AUTO_INCREMENT_FLAG ?
			    Field::NEXT_NUMBER : Field::NONE);
  new_field->decimals= decimals ? (uint) set_zone(atoi(decimals),0,
						  NOT_FIXED_DEC-1) : 0;
  new_field->sql_type=type;
  new_field->length=0;
  new_field->change=change;
  new_field->interval=0;
5436
  new_field->pack_length= new_field->key_length= 0;
5437
  new_field->charset=cs;
5438
  new_field->geom_type= (Field::geometry_type) uint_geom_type;
5439

5440
  new_field->comment=*comment;
5441 5442 5443
  /*
    Set flag if this field doesn't have a default value
  */
5444
  if (!default_value && !(type_modifier & AUTO_INCREMENT_FLAG) &&
5445
      (type_modifier & NOT_NULL_FLAG) && type != FIELD_TYPE_TIMESTAMP)
5446 5447
    new_field->flags|= NO_DEFAULT_VALUE_FLAG;

5448 5449
  if (length && !(new_field->length= (uint) atoi(length)))
    length=0; /* purecov: inspected */
5450
  sign_len=type_modifier & UNSIGNED_FLAG ? 0 : 1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5451 5452

  if (new_field->length && new_field->decimals &&
5453
      new_field->length < new_field->decimals+1 &&
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5454
      new_field->decimals != NOT_FIXED_DEC)
5455
    new_field->length=new_field->decimals+1; /* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5456 5457 5458

  switch (type) {
  case FIELD_TYPE_TINY:
5459
    if (!length) new_field->length=MAX_TINYINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5460 5461 5462
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_SHORT:
5463
    if (!length) new_field->length=MAX_SMALLINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5464 5465 5466
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_INT24:
5467
    if (!length) new_field->length=MAX_MEDIUMINT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5468 5469 5470
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONG:
5471
    if (!length) new_field->length=MAX_INT_WIDTH+sign_len;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5472 5473 5474
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONGLONG:
5475
    if (!length) new_field->length=MAX_BIGINT_WIDTH;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5476 5477 5478 5479
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_NULL:
    break;
5480
  case FIELD_TYPE_NEWDECIMAL:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5481
    if (!length)
monty@mysql.com's avatar
monty@mysql.com committed
5482
    {
5483
      if (!(new_field->length= new_field->decimals))
monty@mysql.com's avatar
monty@mysql.com committed
5484 5485
        new_field->length= 10;                  // Default length for DECIMAL
    }
5486 5487
    new_field->pack_length=
      my_decimal_get_binary_size(new_field->length, new_field->decimals);
5488
    if (new_field->length <= DECIMAL_MAX_PRECISION &&
5489
        new_field->length >= new_field->decimals)
5490 5491 5492 5493
    {
      new_field->length=
        my_decimal_precision_to_length(new_field->length, new_field->decimals,
                                       type_modifier & UNSIGNED_FLAG);
5494
      break;
5495
    }
5496
    my_error(ER_WRONG_FIELD_SPEC, MYF(0), field_name);
5497
    DBUG_RETURN(NULL);
5498 5499 5500 5501 5502 5503 5504 5505 5506
  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
5507 5508 5509 5510
  case FIELD_TYPE_BLOB:
  case FIELD_TYPE_TINY_BLOB:
  case FIELD_TYPE_LONG_BLOB:
  case FIELD_TYPE_MEDIUM_BLOB:
5511
  case FIELD_TYPE_GEOMETRY:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5512 5513 5514 5515 5516 5517
    if (default_value)				// Allow empty as default value
    {
      String str,*res;
      res=default_value->val_str(&str);
      if (res->length())
      {
5518 5519
	my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0),
                 field_name); /* purecov: inspected */
5520
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538
      }
      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)
      {
5539
	my_error(ER_WRONG_FIELD_SPEC, MYF(0), field_name);
5540
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568
      }
      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;
    }
    if (!length)
    {
      new_field->length =  FLT_DIG+6;
      new_field->decimals= NOT_FIXED_DEC;
    }
    break;
  case FIELD_TYPE_DOUBLE:
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    if (!length)
    {
      new_field->length = DBL_DIG+7;
      new_field->decimals=NOT_FIXED_DEC;
    }
    break;
  case FIELD_TYPE_TIMESTAMP:
    if (!length)
      new_field->length= 14;			// Full date YYYYMMDDHHMMSS
5569
    else if (new_field->length != 19)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5570
    {
5571 5572 5573 5574
      /*
        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
5575 5576 5577
      new_field->length=((new_field->length+1)/2)*2; /* purecov: inspected */
      new_field->length= min(new_field->length,14); /* purecov: inspected */
    }
5578
    new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598
    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
    {
5599 5600 5601 5602 5603 5604 5605 5606
      /*
        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
5607
        information about all TIMESTAMP fields in table will be availiable.
5608 5609 5610

        If we have TIMESTAMP NULL column without explicit DEFAULT value
        we treat it as having DEFAULT NULL attribute.
5611
      */
monty@mysql.com's avatar
monty@mysql.com committed
5612 5613 5614 5615 5616
      new_field->unireg_check= (on_update_value ?
                                Field::TIMESTAMP_UN_FIELD :
                                (new_field->flags & NOT_NULL_FLAG ?
                                 Field::TIMESTAMP_OLD_FIELD:
                                 Field::NONE));
5617
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633
    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:
    {
5634
      if (interval_list->elements > sizeof(longlong)*8)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5635
      {
5636
	my_error(ER_TOO_BIG_SET, MYF(0), field_name); /* purecov: inspected */
5637
	DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5638
      }
5639
      new_field->pack_length= get_set_pack_length(interval_list->elements);
5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650

      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;
5651
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5652 5653 5654
    }
  case FIELD_TYPE_ENUM:
    {
5655
      // Should be safe
5656
      new_field->pack_length= get_enum_pack_length(interval_list->elements);
5657

5658 5659 5660 5661 5662
      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
5663
      break;
5664
   }
5665 5666
  case MYSQL_TYPE_VAR_STRING:
    DBUG_ASSERT(0);                             // Impossible
5667
    break;
ram@gw.mysql.r18.ru's avatar
ram@gw.mysql.r18.ru committed
5668 5669 5670 5671 5672 5673 5674 5675
  case MYSQL_TYPE_BIT:
    {
      if (!length)
        new_field->length= 1;
      if (new_field->length > MAX_BIT_FIELD_LENGTH)
      {
        my_error(ER_TOO_BIG_FIELDLENGTH, MYF(0), field_name,
                 MAX_BIT_FIELD_LENGTH);
5676
        DBUG_RETURN(NULL);
ram@gw.mysql.r18.ru's avatar
ram@gw.mysql.r18.ru committed
5677 5678 5679 5680
      }
      new_field->pack_length= (new_field->length + 7) / 8;
      break;
    }
5681 5682
  case FIELD_TYPE_DECIMAL:
    DBUG_ASSERT(0); /* Was obsolete */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5683 5684
  }

5685 5686 5687 5688 5689 5690 5691
  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
5692
  {
5693
    my_error(ER_TOO_BIG_FIELDLENGTH, MYF(0),
5694
             field_name, max_field_charlength); /* purecov: inspected */
5695
    DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5696 5697 5698 5699
  }
  type_modifier&= AUTO_INCREMENT_FLAG;
  if ((~allowed_type_modifier) & type_modifier)
  {
5700
    my_error(ER_WRONG_FIELD_SPEC, MYF(0), field_name);
5701
    DBUG_RETURN(NULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5702
  }
5703
  DBUG_RETURN(new_field);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5704 5705
}

5706

bk@work.mysql.com's avatar
bk@work.mysql.com committed
5707 5708 5709 5710 5711 5712 5713 5714
/* 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
5715
add_proc_to_list(THD* thd, Item *item)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5716 5717 5718 5719
{
  ORDER *order;
  Item	**item_ptr;

monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5720
  if (!(order = (ORDER *) thd->alloc(sizeof(ORDER)+sizeof(Item*))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5721 5722 5723 5724 5725
    return 1;
  item_ptr = (Item**) (order+1);
  *item_ptr= item;
  order->item=item_ptr;
  order->free_me=0;
5726
  thd->lex->proc_list.link_in_list((byte*) order,(byte**) &order->next);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5727 5728 5729 5730 5731 5732 5733 5734
  return 0;
}


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

static void remove_escape(char *name)
{
5735 5736
  if (!*name)					// For empty DB names
    return;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5737 5738
  char *to;
#ifdef USE_MB
5739
  char *strend=name+(uint) strlen(name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5740 5741 5742 5743 5744
#endif
  for (to=name; *name ; name++)
  {
#ifdef USE_MB
    int l;
5745 5746
    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
5747 5748 5749 5750 5751 5752 5753 5754
    {
	while (l--)
	    *to++ = *name++;
	name--;
	continue;
    }
#endif
    if (*name == '\\' && name[1])
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
5755
      name++;					// Skip '\\'
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5756 5757 5758 5759 5760 5761 5762 5763 5764 5765
    *to++= *name;
  }
  *to=0;
}

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


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5766
bool add_to_list(THD *thd, SQL_LIST &list,Item *item,bool asc)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5767 5768 5769
{
  ORDER *order;
  DBUG_ENTER("add_to_list");
5770
  if (!(order = (ORDER *) thd->alloc(sizeof(ORDER))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5771
    DBUG_RETURN(1);
5772 5773
  order->item_ptr= item;
  order->item= &order->item_ptr;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5774 5775 5776
  order->asc = asc;
  order->free_me=0;
  order->used=0;
5777
  order->counter_used= 0;
5778
  list.link_in_list((byte*) order,(byte**) &order->next);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5779 5780 5781 5782
  DBUG_RETURN(0);
}


monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801
/*
  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
5802 5803
TABLE_LIST *st_select_lex::add_table_to_list(THD *thd,
					     Table_ident *table,
5804
					     LEX_STRING *alias,
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5805 5806
					     ulong table_options,
					     thr_lock_type lock_type,
5807 5808
					     List<String> *use_index_arg,
					     List<String> *ignore_index_arg,
igor@rurik.mysql.com's avatar
igor@rurik.mysql.com committed
5809
                                             LEX_STRING *option)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5810 5811 5812
{
  register TABLE_LIST *ptr;
  char *alias_str;
5813
  LEX *lex= thd->lex;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5814 5815 5816 5817 5818
  DBUG_ENTER("add_table_to_list");

  if (!table)
    DBUG_RETURN(0);				// End of memory
  alias_str= alias ? alias->str : table->table.str;
5819
  if (check_table_name(table->table.str,table->table.length) ||
5820
      table->db.str && check_db_name(table->db.str))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5821
  {
5822
    my_error(ER_WRONG_TABLE_NAME, MYF(0), table->table.str);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5823 5824 5825 5826
    DBUG_RETURN(0);
  }

  if (!alias)					/* Alias is case sensitive */
5827 5828 5829
  {
    if (table->sel)
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5830 5831
      my_message(ER_DERIVED_MUST_HAVE_ALIAS,
                 ER(ER_DERIVED_MUST_HAVE_ALIAS), MYF(0));
5832 5833
      DBUG_RETURN(0);
    }
5834
    if (!(alias_str=thd->memdup(alias_str,table->table.length+1)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5835
      DBUG_RETURN(0);
5836
  }
5837
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5838
    DBUG_RETURN(0);				/* purecov: inspected */
peter@mysql.com's avatar
peter@mysql.com committed
5839
  if (table->db.str)
5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850
  {
    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;
  }
  else
  {
5851 5852
    /* The following can't be "" as we may do 'casedn_str()' on it */
    ptr->db= empty_c_string;
5853 5854
    ptr->db_length= 0;
  }
5855 5856
  if (thd->current_arena->is_stmt_prepare())
    ptr->db= thd->strdup(ptr->db);
peter@mysql.com's avatar
peter@mysql.com committed
5857

5858
  ptr->alias= alias_str;
5859 5860
  if (lower_case_table_names && table->table.length)
    my_casedn_str(files_charset_info, table->table.str);
5861 5862
  ptr->table_name=table->table.str;
  ptr->table_name_length=table->table.length;
5863
  ptr->lock_type=   lock_type;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
5864 5865
  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
5866
  ptr->ignore_leaves= test(table_options & TL_OPTION_IGNORE_LEAVES);
5867
  ptr->derived=	    table->sel;
5868 5869 5870
  if (!my_strcasecmp(system_charset_info, ptr->db,
                     information_schema_name.str))
  {
5871
    ST_SCHEMA_TABLE *schema_table= find_schema_table(thd, ptr->table_name);
5872 5873 5874
    if (!schema_table ||
        (schema_table->hidden && 
         lex->orig_sql_command == SQLCOM_END))  // not a 'show' command
5875
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5876
      my_error(ER_UNKNOWN_TABLE, MYF(0),
5877
               ptr->table_name, information_schema_name.str);
5878 5879
      DBUG_RETURN(0);
    }
5880
    ptr->schema_table_name= ptr->table_name;
5881 5882
    ptr->schema_table= schema_table;
  }
5883
  ptr->select_lex=  lex->current_select;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
5884
  ptr->cacheable_table= 1;
5885 5886 5887 5888 5889 5890
  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
5891
  ptr->option= option ? option->str : 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5892
  /* check that used name is unique */
5893
  if (lock_type != TL_IGNORE)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5894
  {
5895
    for (TABLE_LIST *tables=(TABLE_LIST*) table_list.first ;
5896
	 tables ;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5897
	 tables=tables->next_local)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5898
    {
5899 5900
      if (!my_strcasecmp(table_alias_charset, alias_str, tables->alias) &&
	  !strcmp(ptr->db, tables->db))
5901
      {
5902
	my_error(ER_NONUNIQ_TABLE, MYF(0), alias_str); /* purecov: tested */
5903 5904
	DBUG_RETURN(0);				/* purecov: tested */
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5905 5906
    }
  }
5907
  /* Link table in local list (list for current select) */
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
5908
  table_list.link_in_list((byte*) ptr, (byte**) &ptr->next_local);
5909
  /* Link table in global list (all used tables) */
5910
  lex->add_to_query_tables(ptr);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
5911 5912 5913
  DBUG_RETURN(ptr);
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
5914

5915 5916 5917 5918
/*
  Initialize a new table list for a nested join

  SYNOPSIS
5919
    init_nested_join()
5920
    thd         current thread
5921

5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940
  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");
5941

5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))) ||
      !(nested_join= ptr->nested_join=
                    (NESTED_JOIN *) thd->calloc(sizeof(NESTED_JOIN))))
    DBUG_RETURN(1);
  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
5966
    moves it one level up, eliminating the nest.
5967 5968 5969 5970 5971 5972 5973 5974 5975

  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;
5976
  NESTED_JOIN *nested_join;
5977
  DBUG_ENTER("end_nested_join");
5978

5979
  DBUG_ASSERT(embedding);
5980 5981 5982
  ptr= embedding;
  join_list= ptr->join_list;
  embedding= ptr->embedding;
5983
  nested_join= ptr->nested_join;
5984 5985 5986 5987 5988 5989 5990 5991 5992
  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;
  }
5993
  else if (nested_join->join_list.elements == 0)
5994 5995
  {
    join_list->pop();
5996
    ptr= 0;                                     // return value
5997
  }
5998 5999 6000 6001 6002 6003 6004 6005
  DBUG_RETURN(ptr);
}


/*
  Nest last join operation

  SYNOPSIS
6006
    nest_last_join()
6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021
    thd         current thread

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

  RETURN VALUE
    Pointer to TABLE_LIST element created for the new nested join, if success
    0, otherwise
*/

TABLE_LIST *st_select_lex::nest_last_join(THD *thd)
{
  TABLE_LIST *ptr;
  NESTED_JOIN *nested_join;
  DBUG_ENTER("nest_last_join");
6022

6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))) ||
      !(nested_join= ptr->nested_join=
                    (NESTED_JOIN *) thd->calloc(sizeof(NESTED_JOIN))))
    DBUG_RETURN(0);
  ptr->embedding= embedding;
  ptr->join_list= join_list;
  List<TABLE_LIST> *embedded_list= &nested_join->join_list;
  embedded_list->empty();
  for (int i=0; i < 2; i++)
  {
    TABLE_LIST *table= join_list->pop();
    table->join_list= embedded_list;
    table->embedding= ptr;
    embedded_list->push_back(table);
  }
  join_list->push_front(ptr);
  nested_join->used_tables= nested_join->not_null_tables= (table_map) 0;
  DBUG_RETURN(ptr);
}


/*
6045
  Save names for a join with using clause
6046

6047 6048 6049 6050 6051 6052 6053
  SYNOPSIS
    save_names_for_using_list
    tab1      left table in join
    tab2      right table in join

  DESCRIPTION
    The function saves the full names of the tables in st_select_lex
6054 6055
    to be able to build later an on expression to replace the using clause.

6056
  RETURN VALUE
6057 6058
    None
*/
6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079

void st_select_lex::save_names_for_using_list(TABLE_LIST *tab1,
                                              TABLE_LIST *tab2)
{
  while (tab1->nested_join)
  {
    tab1= tab1->nested_join->join_list.head();
  }
  db1= tab1->db;
  table1= tab1->alias;
  while (tab2->nested_join)
  {
    TABLE_LIST *next;
    List_iterator_fast<TABLE_LIST> it(tab2->nested_join->join_list);
    tab2= it++;
    while ((next= it++))
      tab2= next;
  }
  db2= tab2->db;
  table2= tab2->alias;
}
6080

6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114

/*
  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
6115 6116 6117

  DESCRIPTION
    The function takes the current join list t[0],t[1] ... and
6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140
    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
*/

6141
TABLE_LIST *st_select_lex::convert_right_join()
6142 6143
{
  TABLE_LIST *tab2= join_list->pop();
6144
  TABLE_LIST *tab1= join_list->pop();
6145 6146 6147 6148 6149 6150 6151 6152 6153
  DBUG_ENTER("convert_right_join");

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

  DBUG_RETURN(tab1);
}

6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166
/*
  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
*/

6167
void st_select_lex::set_lock_for_tables(thr_lock_type lock_type)
6168 6169 6170 6171 6172 6173
{
  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
6174 6175 6176
  for (TABLE_LIST *tables= (TABLE_LIST*) table_list.first;
       tables;
       tables= tables->next_local)
6177 6178 6179 6180 6181 6182 6183
  {
    tables->lock_type= lock_type;
    tables->updating=  for_update;
  }
  DBUG_VOID_RETURN;
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
6184

bk@work.mysql.com's avatar
bk@work.mysql.com committed
6185 6186
void add_join_on(TABLE_LIST *b,Item *expr)
{
6187
  if (expr)
6188
  {
6189 6190 6191 6192
    if (!b->on_expr)
      b->on_expr=expr;
    else
    {
monty@mysql.com's avatar
monty@mysql.com committed
6193
      /* This only happens if you have both a right and left join */
6194 6195 6196
      b->on_expr=new Item_cond_and(b->on_expr,expr);
    }
    b->on_expr->top_level_item();
6197
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6198 6199 6200
}


6201 6202 6203 6204 6205 6206 6207
/*
  Mark that we have a NATURAL JOIN between two tables

  SYNOPSIS
    add_join_natural()
    a			Table to do normal join with
    b			Do normal join with this table
6208

6209 6210 6211 6212 6213 6214 6215 6216 6217 6218
  IMPLEMENTATION
    This function just marks that table b should be joined with a.
    The function setup_cond() will create in b->on_expr a list
    of equal condition between all fields of the same name.

    SELECT * FROM t1 NATURAL LEFT JOIN t2
     <=>
    SELECT * FROM t1 LEFT JOIN t2 ON (t1.i=t2.i and t1.j=t2.j ... )
*/

bk@work.mysql.com's avatar
bk@work.mysql.com committed
6219 6220 6221 6222 6223
void add_join_natural(TABLE_LIST *a,TABLE_LIST *b)
{
  b->natural_join=a;
}

6224
/*
6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241
  Reload/resets privileges and the different caches.

  SYNOPSIS
    reload_acl_and_cache()
    thd			Thread handler
    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
                        pointer where, if it is not NULL, reload_acl_and_cache()
                        will put 0 if it thinks we really should not write to
                        the binlog. Otherwise it will put 1.

  RETURN
    0	 ok
    !=0  error
6242 6243
*/

6244 6245
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
6246 6247 6248
{
  bool result=0;
  select_errors=0;				/* Write if more errors */
6249
  bool tmp_write_to_binlog= 1;
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
6250
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6251 6252
  if (options & REFRESH_GRANT)
  {
6253
    acl_reload(thd);
6254
    grant_reload(thd);
6255
    reset_mqh((LEX_USER *)NULL, TRUE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6256
  }
hf@deer.(none)'s avatar
SCRUM  
hf@deer.(none) committed
6257
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6258 6259
  if (options & REFRESH_LOG)
  {
6260
    /*
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6261 6262
      Flush the normal query log, the update log, the binary log,
      the slow query log, and the relay log (if it exists).
6263
    */
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
6264

6265
    /*
6266 6267 6268 6269 6270
     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)
    */
    tmp_write_to_binlog= 0;
6271 6272
    mysql_log.new_file(1);
    mysql_slow_log.new_file(1);
6273
    mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
6274
#ifdef HAVE_REPLICATION
6275
    pthread_mutex_lock(&LOCK_active_mi);
6276
    rotate_relay_log(active_mi);
6277
    pthread_mutex_unlock(&LOCK_active_mi);
6278
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6279 6280
    if (ha_flush_logs())
      result=1;
6281 6282
    if (flush_error_log())
      result=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6283
  }
6284
#ifdef HAVE_QUERY_CACHE
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6285 6286
  if (options & REFRESH_QUERY_CACHE_FREE)
  {
6287
    query_cache.pack();				// FLUSH QUERY CACHE
6288
    options &= ~REFRESH_QUERY_CACHE;    // Don't flush cache, just free memory
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6289 6290 6291
  }
  if (options & (REFRESH_TABLES | REFRESH_QUERY_CACHE))
  {
6292
    query_cache.flush();			// RESET QUERY CACHE
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
6293
  }
6294
#endif /*HAVE_QUERY_CACHE*/
6295 6296 6297 6298 6299
  /*
    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
6300
  {
6301
    if ((options & REFRESH_READ_LOCK) && thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6302
    {
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
6303 6304 6305 6306
      /*
	Writing to the binlog could cause deadlocks, as we don't log
	UNLOCK TABLES
      */
6307
      tmp_write_to_binlog= 0;
6308 6309
      if (lock_global_read_lock(thd))
	return 1;
6310 6311
      result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1,
                                 tables);
6312 6313 6314 6315 6316 6317
      if (make_global_read_lock_block_commit(thd))
      {
        /* 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
6318
    }
6319 6320
    else
      result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1, tables);
6321
    my_dbopt_cleanup();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6322 6323 6324
  }
  if (options & REFRESH_HOSTS)
    hostname_cache_refresh();
monty@mysql.com's avatar
monty@mysql.com committed
6325
  if (thd && (options & REFRESH_STATUS))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6326 6327 6328
    refresh_status();
  if (options & REFRESH_THREADS)
    flush_thread_cache();
6329
#ifdef HAVE_REPLICATION
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6330
  if (options & REFRESH_MASTER)
6331 6332
  {
    tmp_write_to_binlog= 0;
6333 6334
    if (reset_master(thd))
      result=1;
6335
  }
6336
#endif
6337
#ifdef OPENSSL
6338 6339 6340 6341 6342 6343
   if (options & REFRESH_DES_KEY_FILE)
   {
     if (des_key_file)
       result=load_des_key_file(des_key_file);
   }
#endif
6344
#ifdef HAVE_REPLICATION
6345 6346
 if (options & REFRESH_SLAVE)
 {
6347
   tmp_write_to_binlog= 0;
6348
   pthread_mutex_lock(&LOCK_active_mi);
6349
   if (reset_slave(thd, active_mi))
6350
     result=1;
6351
   pthread_mutex_unlock(&LOCK_active_mi);
6352
 }
6353
#endif
6354
 if (options & REFRESH_USER_RESOURCES)
monty@mysql.com's avatar
monty@mysql.com committed
6355
   reset_mqh((LEX_USER *) NULL);
6356 6357
 if (write_to_binlog)
   *write_to_binlog= tmp_write_to_binlog;
6358
 return result;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6359 6360
}

6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372
/*
  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
6373
void kill_one_thread(THD *thd, ulong id, bool only_kill_query)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6374 6375 6376
{
  THD *tmp;
  uint error=ER_NO_SUCH_THREAD;
6377 6378
  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
6379 6380 6381 6382
  while ((tmp=it++))
  {
    if (tmp->thread_id == id)
    {
6383 6384
      pthread_mutex_lock(&tmp->LOCK_delete);	// Lock from delete
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6385 6386 6387
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
6388 6389 6390 6391 6392
  if (tmp)
  {
    if ((thd->master_access & SUPER_ACL) ||
	!strcmp(thd->user,tmp->user))
    {
hf@genie.(none)'s avatar
SCRUM  
hf@genie.(none) committed
6393
      tmp->awake(only_kill_query ? THD::KILL_QUERY : THD::KILL_CONNECTION);
6394 6395 6396 6397 6398 6399 6400
      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
6401
  if (!error)
6402
    send_ok(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6403
  else
6404
    my_error(error, MYF(0), id);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
6405 6406
}

timour@mysql.com's avatar
timour@mysql.com committed
6407

bk@work.mysql.com's avatar
bk@work.mysql.com committed
6408 6409 6410 6411 6412 6413 6414 6415
/* 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)
6416
      *(ulong*) ptr->value= 0;
6417 6418 6419 6420 6421 6422 6423
    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
6424
  }
timour@mysql.com's avatar
timour@mysql.com committed
6425 6426
  /* 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
6427 6428
  pthread_mutex_unlock(&LOCK_status);
}
6429 6430 6431 6432


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

6433 6434
static bool append_file_to_dir(THD *thd, const char **filename_ptr,
			       const char *table_name)
6435
{
6436
  char buff[FN_REFLEN],*ptr, *end;
6437 6438 6439 6440 6441 6442 6443
  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))
  {
6444
    my_error(ER_WRONG_TABLE_NAME, MYF(0), *filename_ptr);
6445 6446 6447 6448
    return 1;
  }
  /* Fix is using unix filename format on dos */
  strmov(buff,*filename_ptr);
6449
  end=convert_dirname(buff, *filename_ptr, NullS);
6450
  if (!(ptr=thd->alloc((uint) (end-buff)+(uint) strlen(table_name)+1)))
6451 6452
    return 1;					// End of memory
  *filename_ptr=ptr;
6453
  strxmov(ptr,buff,table_name,NullS);
6454 6455
  return 0;
}
6456

6457

6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471
/*
  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;
6472 6473
  LEX *lex= thd->lex;
  if (lex->current_select != &lex->select_lex)
6474 6475
  {
    char command[80];
6476 6477
    strmake(command, lex->yylval->symbol.str,
	    min(lex->yylval->symbol.length, sizeof(command)-1));
6478
    my_error(ER_CANT_USE_OPTION_HERE, MYF(0), command);
6479 6480 6481 6482
    return 1;
  }
  return 0;
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6483

6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499
/*
  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
*/
6500
static bool check_multi_update_lock(THD *thd)
6501 6502
{
  bool res= 1;
6503 6504
  LEX *lex= thd->lex;
  TABLE_LIST *table, *tables= lex->query_tables;
6505 6506 6507 6508 6509 6510 6511 6512 6513
  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()
  */
6514
  for (table= tables ; table ; table= table->next_local)
6515
  {
6516 6517
    TABLE_LIST *save= table->next_local;
    table->next_local= 0;
6518 6519 6520
    if ((check_access(thd, UPDATE_ACL, table->db, &table->grant.privilege,0,1) ||
        (grant_option && check_grant(thd, UPDATE_ACL, table,0,1,1))) &&
	check_one_table_access(thd, SELECT_ACL, table))
6521
	goto error;
6522
    table->next_local= save;
6523 6524
  }
    
6525
  if (mysql_multi_update_prepare(thd))
6526 6527 6528 6529 6530 6531 6532
    goto error;
  
  res= 0;
  
error:
  DBUG_RETURN(res);
}
6533

6534

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6535
Comp_creator *comp_eq_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6536
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6537
  return invert?(Comp_creator *)&ne_creator:(Comp_creator *)&eq_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6538 6539
}

6540

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6541
Comp_creator *comp_ge_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6542
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6543
  return invert?(Comp_creator *)&lt_creator:(Comp_creator *)&ge_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6544 6545
}

6546

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6547
Comp_creator *comp_gt_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6548
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6549
  return invert?(Comp_creator *)&le_creator:(Comp_creator *)&gt_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6550 6551
}

6552

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6553
Comp_creator *comp_le_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6554
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6555
  return invert?(Comp_creator *)&gt_creator:(Comp_creator *)&le_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6556 6557
}

6558

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6559
Comp_creator *comp_lt_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6560
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6561
  return invert?(Comp_creator *)&ge_creator:(Comp_creator *)&lt_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6562 6563
}

6564

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6565
Comp_creator *comp_ne_creator(bool invert)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6566
{
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6567
  return invert?(Comp_creator *)&eq_creator:(Comp_creator *)&ne_creator;
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6568
}
6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588


/*
  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
6589
  if ((cmp == &comp_eq_creator) && !all)       //  = ANY <=> IN
6590
    return new Item_in_subselect(left_expr, select_lex);
serg@serg.mylan's avatar
serg@serg.mylan committed
6591 6592

  if ((cmp == &comp_ne_creator) && all)        // <> ALL <=> NOT IN
6593 6594 6595
    return new Item_func_not(new Item_in_subselect(left_expr, select_lex));

  Item_allany_subselect *it=
6596
    new Item_allany_subselect(left_expr, (*cmp)(all), select_lex, all);
6597
  if (all)
6598
    return it->upper_item= new Item_func_not_all(it);	/* ALL */
6599

6600
  return it->upper_item= new Item_func_nop_all(it);      /* ANY/SOME */
6601
}
6602 6603


6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615
/*
  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.
*/

6616
bool mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys)
6617 6618
{
  List<create_field> fields;
6619 6620
  ALTER_INFO alter_info;
  alter_info.flags= ALTER_ADD_INDEX;
6621 6622 6623 6624 6625
  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;
6626
  DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
6627
				&create_info, table_list,
6628
				fields, keys, 0, (ORDER*)0,
monty@mysql.com's avatar
monty@mysql.com committed
6629
				DUP_ERROR, 0, &alter_info, 1));
6630 6631 6632
}


6633
bool mysql_drop_index(THD *thd, TABLE_LIST *table_list, ALTER_INFO *alter_info)
6634 6635 6636 6637 6638 6639 6640 6641
{
  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;
6642 6643
  alter_info->clear();
  alter_info->flags= ALTER_DROP_INDEX;
6644
  DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->table_name,
6645
				&create_info, table_list,
6646
				fields, keys, 0, (ORDER*)0,
monty@mysql.com's avatar
monty@mysql.com committed
6647
				DUP_ERROR, 0, alter_info, 1));
6648
}
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
6649 6650


6651 6652 6653 6654 6655
/*
  Multi update query pre-check

  SYNOPSIS
    multi_update_precheck()
6656
    thd		Thread handler
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6657
    tables	Global/local table list (have to be the same)
6658

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6659
  RETURN VALUE
6660 6661
    FALSE OK
    TRUE  Error
6662
*/
6663

6664
bool multi_update_precheck(THD *thd, TABLE_LIST *tables)
6665 6666 6667 6668 6669
{
  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
6670
  DBUG_ENTER("multi_update_precheck");
6671 6672 6673

  if (select_lex->item_list.elements != lex->value_list.elements)
  {
6674
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
6675
    DBUG_RETURN(TRUE);
6676 6677 6678 6679 6680
  }
  /*
    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
6681
  for (table= tables; table; table= table->next_local)
6682
  {
6683 6684 6685 6686 6687 6688
    if (table->derived)
      table->grant.privilege= SELECT_ACL;
    else if ((check_access(thd, UPDATE_ACL, table->db,
                           &table->grant.privilege, 0, 1) ||
              grant_option &&
              check_grant(thd, UPDATE_ACL, table, 0, 1, 1)) &&
monty@mysql.com's avatar
monty@mysql.com committed
6689 6690 6691
             (check_access(thd, SELECT_ACL, table->db,
                           &table->grant.privilege, 0, 0) ||
              grant_option && check_grant(thd, SELECT_ACL, table, 0, 1, 0)))
6692
      DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6693

bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6694
    table->table_in_first_from_clause= 1;
6695
  }
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6696 6697 6698
  /*
    Is there tables of subqueries?
  */
6699 6700
  if (&lex->select_lex != lex->all_selects_list)
  {
6701
    DBUG_PRINT("info",("Checking sub query list"));
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6702
    for (table= tables; table; table= table->next_global)
6703
    {
monty@mysql.com's avatar
monty@mysql.com committed
6704 6705 6706
      if (!my_tz_check_n_skip_implicit_tables(&table,
                                              lex->time_zone_tables_used) &&
          !table->table_in_first_from_clause)
6707 6708 6709
      {
	if (check_access(thd, SELECT_ACL, table->db,
			 &table->grant.privilege, 0, 0) ||
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6710
	    grant_option && check_grant(thd, SELECT_ACL, table, 0, 1, 0))
6711
	  DBUG_RETURN(TRUE);
6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723
      }
    }
  }

  if (select_lex->order_list.elements)
    msg= "ORDER BY";
  else if (select_lex->select_limit && select_lex->select_limit !=
	   HA_POS_ERROR)
    msg= "LIMIT";
  if (msg)
  {
    my_error(ER_WRONG_USAGE, MYF(0), "UPDATE", msg);
6724
    DBUG_RETURN(TRUE);
6725
  }
6726
  DBUG_RETURN(FALSE);
6727 6728 6729 6730 6731 6732 6733
}

/*
  Multi delete query pre-check

  SYNOPSIS
    multi_delete_precheck()
6734
    thd			Thread handler
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6735
    tables		Global/local table list
6736
    table_count		Pointer to table counter
6737

bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6738
  RETURN VALUE
6739 6740
    FALSE OK
    TRUE  error
6741
*/
6742 6743

bool multi_delete_precheck(THD *thd, TABLE_LIST *tables, uint *table_count)
6744 6745 6746 6747
{
  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
bell@sanja.is.com.ua committed
6748
  TABLE_LIST *target_tbl;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6749
  DBUG_ENTER("multi_delete_precheck");
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6750 6751

  *table_count= 0;
6752 6753 6754 6755 6756 6757

  /* 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))
6758
    DBUG_RETURN(TRUE);
6759 6760
  if ((thd->options & OPTION_SAFE_UPDATES) && !select_lex->where)
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6761 6762
    my_message(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE,
               ER(ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE), MYF(0));
6763
    DBUG_RETURN(TRUE);
6764
  }
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6765
  for (target_tbl= aux_tables; target_tbl; target_tbl= target_tbl->next_local)
6766 6767 6768 6769
  {
    (*table_count)++;
    /* 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
6770
    for (walk= tables; walk; walk= walk->next_local)
6771
    {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6772 6773 6774
      if (!my_strcasecmp(table_alias_charset,
			 target_tbl->alias, walk->alias) &&
	  !strcmp(walk->db, target_tbl->db))
6775 6776 6777 6778
	break;
    }
    if (!walk)
    {
6779
      my_error(ER_UNKNOWN_TABLE, MYF(0),
6780
               target_tbl->table_name, "MULTI DELETE");
6781
      DBUG_RETURN(TRUE);
6782
    }
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6783
    walk->lock_type= target_tbl->lock_type;
bell@sanja.is.com.ua's avatar
VIEW  
bell@sanja.is.com.ua committed
6784
    target_tbl->correspondent_table= walk;	// Remember corresponding table
acurtis@xiphis.org's avatar
acurtis@xiphis.org committed
6785 6786 6787
    
    /* in case of subselects, we need to set lock_type in
     * corresponding table in list of all tables */
acurtis@xiphis.org's avatar
Merge  
acurtis@xiphis.org committed
6788
    if (walk->correspondent_table)
6789
    {
acurtis@xiphis.org's avatar
Merge  
acurtis@xiphis.org committed
6790 6791
      target_tbl->correspondent_table= walk->correspondent_table;
      walk->correspondent_table->lock_type= walk->lock_type;
6792
    }
6793
  }
6794
  DBUG_RETURN(FALSE);
6795 6796 6797
}


bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6798 6799 6800 6801 6802
/*
  simple UPDATE query pre-check

  SYNOPSIS
    update_precheck()
6803 6804
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6805 6806

  RETURN VALUE
6807 6808
    FALSE OK
    TRUE  Error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6809
*/
6810

6811
bool update_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6812 6813 6814 6815
{
  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
6816
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
6817
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6818
  }
6819 6820
  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
6821 6822 6823 6824 6825 6826 6827 6828
}


/*
  simple DELETE query pre-check

  SYNOPSIS
    delete_precheck()
6829 6830
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6831 6832

  RETURN VALUE
6833 6834
    FALSE  OK
    TRUE   error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6835
*/
6836

6837
bool delete_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6838 6839 6840
{
  DBUG_ENTER("delete_precheck");
  if (check_one_table_access(thd, DELETE_ACL, tables))
6841
    DBUG_RETURN(TRUE);
6842
  /* Set privilege for the WHERE clause */
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6843
  tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
6844
  DBUG_RETURN(FALSE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6845 6846 6847 6848 6849 6850 6851 6852
}


/*
  simple INSERT query pre-check

  SYNOPSIS
    insert_precheck()
6853 6854
    thd		Thread handler
    tables	Global table list
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6855 6856

  RETURN VALUE
6857 6858
    FALSE  OK
    TRUE   error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6859
*/
6860

bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
6861
bool insert_precheck(THD *thd, TABLE_LIST *tables)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6862 6863 6864 6865
{
  LEX *lex= thd->lex;
  DBUG_ENTER("insert_precheck");

6866 6867 6868 6869
  /*
    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
6870 6871 6872
  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
6873 6874

  if (check_one_table_access(thd, privilege, tables))
6875
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6876

6877
  if (lex->update_list.elements != lex->value_list.elements)
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6878
  {
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6879
    my_message(ER_WRONG_VALUE_COUNT, ER(ER_WRONG_VALUE_COUNT), MYF(0));
6880
    DBUG_RETURN(TRUE);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6881
  }
6882
  DBUG_RETURN(FALSE);
6883
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6884 6885 6886 6887 6888 6889 6890


/*
  CREATE TABLE query pre-check

  SYNOPSIS
    create_table_precheck()
6891 6892 6893
    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
6894 6895

  RETURN VALUE
6896 6897
    FALSE   OK
    TRUE   Error
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6898
*/
6899

6900 6901
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
6902 6903
{
  LEX *lex= thd->lex;
6904 6905
  SELECT_LEX *select_lex= &lex->select_lex;
  ulong want_priv;
bell@sanja.is.com.ua's avatar
merge  
bell@sanja.is.com.ua committed
6906
  bool error= TRUE;                                 // Error message is given
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6907
  DBUG_ENTER("create_table_precheck");
6908 6909 6910

  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
6911 6912 6913 6914 6915 6916
  lex->create_info.alias= create_table->alias;
  if (check_access(thd, want_priv, create_table->db,
		   &create_table->grant.privilege, 0, 0) ||
      check_merge_table_access(thd, create_table->db,
			       (TABLE_LIST *)
			       lex->create_info.merge_list.first))
6917 6918 6919 6920 6921 6922 6923 6924 6925 6926
    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 */

    /*
monty@mysql.com's avatar
monty@mysql.com committed
6927 6928 6929
      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).
6930
    */
monty@mysql.com's avatar
monty@mysql.com committed
6931
    if (thd->current_arena->is_stmt_prepare())
6932
    {
monty@mysql.com's avatar
monty@mysql.com committed
6933 6934 6935 6936
      /*
        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
6937
          find_table_in_global_list(tables, create_table->db,
6938
                                    create_table->table_name))
monty@mysql.com's avatar
monty@mysql.com committed
6939
      {
6940
	error= FALSE;
monty@mysql.com's avatar
monty@mysql.com committed
6941 6942 6943
        goto err;
      }
    }
6944 6945 6946
    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
6947
  error= FALSE;
6948 6949 6950

err:
  DBUG_RETURN(error);
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6951
}
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6952 6953 6954 6955 6956 6957 6958


/*
  negate given expression

  SYNOPSIS
    negate_expression()
6959
    thd  thread handler
bell@sanja.is.com.ua's avatar
bell@sanja.is.com.ua committed
6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987
    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);
}