sql_parse.cc 104 KB
Newer Older
unknown's avatar
unknown committed
1
/* Copyright (C) 2000 MySQL AB
2

unknown's avatar
unknown 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

unknown's avatar
unknown 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

unknown's avatar
unknown committed
13 14 15 16 17 18
   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"
#include "sql_acl.h"
19
#include "sql_repl.h"
20
#include "repl_failsafe.h"
unknown's avatar
unknown committed
21 22 23
#include <m_ctype.h>
#include <myisam.h>
#include <my_dir.h>
unknown's avatar
unknown committed
24
#include <assert.h>
unknown's avatar
unknown committed
25

unknown's avatar
unknown committed
26
#ifdef HAVE_INNOBASE_DB
27
#include "ha_innodb.h"
unknown's avatar
unknown committed
28 29
#endif

unknown's avatar
unknown committed
30 31 32 33 34 35 36 37 38 39 40
#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?
*/
unknown's avatar
unknown committed
41 42 43
#define SSL_HANDSHAKE_SIZE      2
#define NORMAL_HANDSHAKE_SIZE   6
#define MIN_HANDSHAKE_SIZE      2
unknown's avatar
unknown committed
44
#else
unknown's avatar
unknown committed
45
#define MIN_HANDSHAKE_SIZE      6
unknown's avatar
unknown committed
46
#endif /* HAVE_OPENSSL */
unknown's avatar
unknown committed
47 48
#define SCRAMBLE_LENGTH 8

49 50 51 52
#define MEM_ROOT_BLOCK_SIZE       8192
#define MEM_ROOT_PREALLOC         8192
#define TRANS_MEM_ROOT_BLOCK_SIZE 4096
#define TRANS_MEM_ROOT_PREALLOC   4096
unknown's avatar
unknown committed
53

unknown's avatar
unknown committed
54 55
extern int yyparse(void);
extern "C" pthread_mutex_t THR_LOCK_keycache;
56 57 58
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
unknown's avatar
unknown committed
59

60
static int check_for_max_user_connections(THD *thd, USER_CONN *uc);
61
static void decrease_user_connections(USER_CONN *uc);
unknown's avatar
unknown committed
62
static bool check_db_used(THD *thd,TABLE_LIST *tables);
63
static bool check_merge_table_access(THD *thd, char *db, TABLE_LIST *tables);
unknown's avatar
unknown committed
64
static bool check_dup(const char *db, const char *name, TABLE_LIST *tables);
unknown's avatar
unknown committed
65 66
static void remove_escape(char *name);
static void refresh_status(void);
unknown's avatar
unknown committed
67 68
static bool append_file_to_dir(THD *thd, char **filename_ptr,
			       char *table_name);
unknown's avatar
unknown committed
69

70
const char *any_db="*any*";	// Special symbol for check_access
unknown's avatar
unknown committed
71 72 73 74 75

const char *command_name[]={
  "Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
  "Drop DB", "Refresh", "Shutdown", "Statistics", "Processlist",
  "Connect","Kill","Debug","Ping","Time","Delayed_insert","Change user",
unknown's avatar
unknown committed
76 77
  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave",
  "Prepare", "Prepare Execute", "Long Data"
unknown's avatar
unknown committed
78 79
};

80
static char empty_c_string[1]= {0};		// Used for not defined 'db'
unknown's avatar
unknown committed
81 82 83 84

#ifdef __WIN__
static void  test_signal(int sig_ptr)
{
unknown's avatar
unknown committed
85
#if !defined( DBUG_OFF)
unknown's avatar
unknown committed
86 87
  MessageBox(NULL,"Test signal","DBUG",MB_OK);
#endif
unknown's avatar
unknown committed
88
#if defined(OS2)
89 90
  fprintf(stderr, "Test signal %d\n", sig_ptr);
  fflush(stderr);
unknown's avatar
unknown committed
91
#endif
unknown's avatar
unknown committed
92 93 94 95
}
static void init_signals(void)
{
  int signals[7] = {SIGINT,SIGILL,SIGFPE,SIGSEGV,SIGTERM,SIGBREAK,SIGABRT } ;
96
  for (int i=0 ; i < 7 ; i++)
unknown's avatar
unknown committed
97 98 99 100
    signal( signals[i], test_signal) ;
}
#endif

unknown's avatar
unknown committed
101
inline bool end_active_trans(THD *thd)
102
{
unknown's avatar
unknown committed
103
  int error=0;
unknown's avatar
unknown committed
104
  if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN |
unknown's avatar
unknown committed
105
		      OPTION_TABLE_LOCK))
106
  {
107 108
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
109
    if (ha_commit(thd))
unknown's avatar
unknown committed
110
      error=1;
111
  }
unknown's avatar
unknown committed
112
  return error;
113 114 115
}


116 117 118
static HASH hash_user_connections;
extern  pthread_mutex_t LOCK_user_conn;

unknown's avatar
unknown committed
119 120
static int get_or_create_user_conn(THD *thd, const char *user,
				   const char *host,
121
				   USER_RESOURCES *mqh) 
122 123
{
  int return_val=0;
124
  uint temp_len, user_len, host_len;
125 126 127 128 129 130
  char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
  struct  user_conn *uc;

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

131 132 133
  user_len=strlen(user);
  host_len=strlen(host);
  temp_len= (strmov(strmov(temp_user, user)+1, host) - temp_user)+1;
134
  (void) pthread_mutex_lock(&LOCK_user_conn);
unknown's avatar
unknown committed
135 136
  if (!(uc = (struct  user_conn *) hash_search(&hash_user_connections,
					       (byte*) temp_user, temp_len)))
137
  {
unknown's avatar
unknown committed
138 139 140
    /* First connection for user; Create a user connection object */
    if (!(uc= ((struct user_conn*)
	       my_malloc(sizeof(struct user_conn) + temp_len+1,
unknown's avatar
unknown committed
141 142
			 MYF(MY_WME)))))
    {
143
      send_error(thd, 0, NullS);		// Out of memory
144 145
      return_val=1;
      goto end;
unknown's avatar
unknown committed
146
    }
147 148
    uc->user=(char*) (uc+1);
    memcpy(uc->user,temp_user,temp_len+1);
149 150
    uc->user_len= user_len;
    uc->host=uc->user + uc->user_len +  1;
151
    uc->len = temp_len;
152 153 154
    uc->connections = 1;
    uc->questions=uc->updates=uc->conn_per_hour=0;
    uc->user_resources=*mqh;
155
    if (max_user_connections && mqh->connections > max_user_connections) 
156
      uc->user_resources.connections = max_user_connections;
157 158 159 160
    uc->intime=thd->thr_create_time;
    if (hash_insert(&hash_user_connections, (byte*) uc))
    {
      my_free((char*) uc,0);
161
      send_error(thd, 0, NullS);		// Out of memory
162 163 164 165 166 167 168 169 170 171
      return_val=1;
      goto end;
    }
  }
  thd->user_connect=uc;
end:
  (void) pthread_mutex_unlock(&LOCK_user_conn);
  return return_val;
 
}
172 173 174


/*
unknown's avatar
unknown committed
175 176 177
  Check if user is ok
  Updates:
  thd->user, thd->master_access, thd->priv_user, thd->db, thd->db_access
unknown's avatar
unknown committed
178 179 180 181 182 183
*/

static bool check_user(THD *thd,enum_server_command command, const char *user,
		       const char *passwd, const char *db, bool check_count)
{
  thd->db=0;
unknown's avatar
unknown committed
184
  thd->db_length=0;
185
  USER_RESOURCES ur;
unknown's avatar
unknown committed
186 187 188

  if (!(thd->user = my_strdup(user, MYF(0))))
  {
189
    send_error(thd,ER_OUT_OF_RESOURCES);
unknown's avatar
unknown committed
190 191
    return 1;
  }
192
  thd->master_access=acl_getroot(thd, thd->host, thd->ip, thd->user,
unknown's avatar
unknown committed
193 194 195
				 passwd, thd->scramble, &thd->priv_user,
				 protocol_version == 9 ||
				 !(thd->client_capabilities &
196
				   CLIENT_LONG_PASSWORD),&ur);
unknown's avatar
unknown committed
197
  DBUG_PRINT("info",
unknown's avatar
unknown committed
198
	     ("Capabilities: %d  packet_length: %d  Host: '%s'  User: '%s'  Using password: %s  Access: %u  db: '%s'",
unknown's avatar
unknown committed
199
	      thd->client_capabilities, thd->max_client_packet_length,
200
	      thd->host_or_ip, thd->priv_user,
unknown's avatar
unknown committed
201 202 203 204
	      passwd[0] ? "yes": "no",
	      thd->master_access, thd->db ? thd->db : "*none*"));
  if (thd->master_access & NO_ACCESS)
  {
205
    net_printf(thd, ER_ACCESS_DENIED_ERROR,
unknown's avatar
unknown committed
206
	       thd->user,
207
	       thd->host_or_ip,
unknown's avatar
unknown committed
208
	       passwd[0] ? ER(ER_YES) : ER(ER_NO));
209
    mysql_log.write(thd,COM_CONNECT,ER(ER_ACCESS_DENIED_ERROR),
unknown's avatar
unknown committed
210
		    thd->user,
211
		    thd->host_or_ip,
unknown's avatar
unknown committed
212 213 214 215 216 217 218
		    passwd[0] ? ER(ER_YES) : ER(ER_NO));
    return(1);					// Error already given
  }
  if (check_count)
  {
    VOID(pthread_mutex_lock(&LOCK_thread_count));
    bool tmp=(thread_count - delayed_insert_threads >= max_connections &&
unknown's avatar
unknown committed
219
	      !(thd->master_access & SUPER_ACL));
unknown's avatar
unknown committed
220 221 222
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
    if (tmp)
    {						// Too many connections
223
      send_error(thd, ER_CON_COUNT_ERROR);
unknown's avatar
unknown committed
224 225 226
      return(1);
    }
  }
227
  mysql_log.write(thd,command,
unknown's avatar
unknown committed
228 229 230 231
		  (thd->priv_user == thd->user ?
		   (char*) "%s@%s on %s" :
		   (char*) "%s@%s as anonymous on %s"),
		  user,
232
		  thd->host_or_ip,
unknown's avatar
unknown committed
233 234
		  db ? db : (char*) "");
  thd->db_access=0;
unknown's avatar
unknown committed
235
  /* Don't allow user to connect if he has done too many queries */
236 237
  if ((ur.questions || ur.updates || ur.connections) &&
      get_or_create_user_conn(thd,user,thd->host_or_ip,&ur))
unknown's avatar
unknown committed
238
    return -1;
239
  if (thd->user_connect && thd->user_connect->user_resources.connections && 
240
      check_for_max_user_connections(thd, thd->user_connect))
unknown's avatar
unknown committed
241
    return -1;
unknown's avatar
unknown committed
242
  if (db && db[0])
unknown's avatar
unknown committed
243 244
  {
    bool error=test(mysql_change_db(thd,db));
245 246
    if (error && thd->user_connect)
      decrease_user_connections(thd->user_connect);
unknown's avatar
unknown committed
247 248
    return error;
  }
unknown's avatar
unknown committed
249
  else
250
    send_ok(thd);				// Ready to handle questions
unknown's avatar
unknown committed
251 252 253
  return 0;					// ok
}

254

unknown's avatar
unknown committed
255
/*
unknown's avatar
unknown committed
256 257
  Check for maximum allowable user connections, if the mysqld server is
  started with corresponding variable that is greater then 0.
unknown's avatar
unknown committed
258 259
*/

unknown's avatar
unknown committed
260 261 262 263 264 265 266 267 268 269 270 271
static byte* get_key_conn(user_conn *buff, uint *length,
			  my_bool not_used __attribute__((unused)))
{
  *length=buff->len;
  return (byte*) buff->user;
}

static void free_user(struct user_conn *uc)
{
  my_free((char*) uc,MYF(0));
}

unknown's avatar
unknown committed
272 273
void init_max_user_conn(void) 
{
unknown's avatar
unknown committed
274 275
  (void) hash_init(&hash_user_connections,system_charset_info,max_connections,
		   0,0,
276 277
		   (hash_get_key) get_key_conn, (void (*)(void*)) free_user,
		   0);
unknown's avatar
unknown committed
278 279 280
}


281
static int check_for_max_user_connections(THD *thd, USER_CONN *uc)
unknown's avatar
unknown committed
282
{
283
  int error=0;
284
  DBUG_ENTER("check_for_max_user_connections");
285
  
286 287
  if (max_user_connections &&
      (max_user_connections <=  (uint) uc->connections))
unknown's avatar
unknown committed
288
  {
289
    net_printf(thd,ER_TOO_MANY_USER_CONNECTIONS, uc->user);
290 291
    error=1;
    goto end;
unknown's avatar
unknown committed
292
  }
293
  uc->connections++; 
294 295
  if (uc->user_resources.connections &&
      uc->conn_per_hour++ >= uc->user_resources.connections)
296
  {
297
    net_printf(thd, ER_USER_LIMIT_REACHED, uc->user,
298
	       "max_connections",
299 300 301
	       (long) uc->user_resources.connections);
    error=1;
  }
302 303
end:
  DBUG_RETURN(error);
unknown's avatar
unknown committed
304 305 306
}


307
static void decrease_user_connections(USER_CONN *uc)
unknown's avatar
unknown committed
308
{
309
  DBUG_ENTER("decrease_user_connections");
310
  if ((uc->connections && !--uc->connections) && !mqh_used)
unknown's avatar
unknown committed
311 312
  {
    /* Last connection for user; Delete it */
313
    (void) pthread_mutex_lock(&LOCK_user_conn);
unknown's avatar
unknown committed
314
    (void) hash_delete(&hash_user_connections,(byte*) uc);
315
    (void) pthread_mutex_unlock(&LOCK_user_conn);
unknown's avatar
unknown committed
316
  }
317
  DBUG_VOID_RETURN;
unknown's avatar
unknown committed
318 319
}

320

unknown's avatar
unknown committed
321 322 323 324 325
void free_max_user_conn(void)
{
  hash_free(&hash_user_connections);
}

unknown's avatar
unknown committed
326

327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358
/*
  Mark all commands that somehow changes a table
  This is used to check number of updates / hour
*/

char  uc_update_queries[SQLCOM_END];

void init_update_queries(void)
{
  uc_update_queries[SQLCOM_CREATE_TABLE]=1;
  uc_update_queries[SQLCOM_CREATE_INDEX]=1;
  uc_update_queries[SQLCOM_ALTER_TABLE]=1;
  uc_update_queries[SQLCOM_UPDATE]=1;
  uc_update_queries[SQLCOM_INSERT]=1;
  uc_update_queries[SQLCOM_INSERT_SELECT]=1;
  uc_update_queries[SQLCOM_DELETE]=1;
  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;
  uc_update_queries[SQLCOM_REPLACE]=1;
  uc_update_queries[SQLCOM_REPLACE_SELECT]=1;
  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_DELETE_MULTI]=1;
  uc_update_queries[SQLCOM_DROP_INDEX]=1;
  uc_update_queries[SQLCOM_MULTI_UPDATE]=1;
}


unknown's avatar
unknown committed
359 360 361
/*
  Check if maximum queries per hour limit has been reached
  returns 0 if OK.
unknown's avatar
unknown committed
362

363 364 365
  In theory we would need a mutex in the USER_CONN structure for this to
  be 100 % safe, but as the worst scenario is that we would miss counting
  a couple of queries, this isn't critical.
unknown's avatar
unknown committed
366 367
*/

368

369
static bool check_mqh(THD *thd, uint check_command)
unknown's avatar
unknown committed
370 371
{
  bool error=0;
unknown's avatar
unknown committed
372
  time_t check_time = thd->start_time ?  thd->start_time : time(NULL);
373
  USER_CONN *uc=thd->user_connect;
unknown's avatar
unknown committed
374
  DBUG_ENTER("check_mqh");
375
  DBUG_ASSERT(uc != 0);
unknown's avatar
unknown committed
376

unknown's avatar
unknown committed
377
  /* If more than a hour since last check, reset resource checking */
378 379 380 381 382 383 384 385 386
  if (check_time  - uc->intime >= 3600)
  {
    (void) pthread_mutex_lock(&LOCK_user_conn);
    uc->questions=1;
    uc->updates=0;
    uc->conn_per_hour=0;
    uc->intime=check_time;
    (void) pthread_mutex_unlock(&LOCK_user_conn);
  }
unknown's avatar
unknown committed
387
  /* Check that we have not done too many questions / hour */
388 389 390
  if (uc->user_resources.questions &&
      uc->questions++ >= uc->user_resources.questions)
  {
391
    net_printf(thd, ER_USER_LIMIT_REACHED, uc->user, "max_questions",
392 393 394 395
	       (long) uc->user_resources.questions);
    error=1;
    goto end;
  }
396
  if (check_command < (uint) SQLCOM_END)
unknown's avatar
unknown committed
397
  {
unknown's avatar
unknown committed
398 399 400 401
    /* 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)
    {
402
      net_printf(thd, ER_USER_LIMIT_REACHED, uc->user, "max_updates",
unknown's avatar
unknown committed
403 404 405 406
		 (long) uc->user_resources.updates);
      error=1;
      goto end;
    }
unknown's avatar
unknown committed
407 408
  }
end:
409
  DBUG_RETURN(error);
unknown's avatar
unknown committed
410 411
}

unknown's avatar
unknown committed
412

413
static void reset_mqh(THD *thd, LEX_USER *lu, bool get_them=false)
414 415
{

unknown's avatar
unknown committed
416
  (void) pthread_mutex_lock(&LOCK_user_conn);
417 418
  if (lu)  // for GRANT 
  {
419
    USER_CONN *uc;
420
    uint temp_len=lu->user.length+lu->host.length+2;
421 422
    char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];

unknown's avatar
unknown committed
423 424
    memcpy(temp_user,lu->user.str,lu->user.length);
    memcpy(temp_user+lu->user.length+1,lu->host.str,lu->host.length);
425
    temp_user[lu->user.length]='\0'; temp_user[temp_len-1]=0;
unknown's avatar
unknown committed
426
    if ((uc = (struct  user_conn *) hash_search(&hash_user_connections,
427
						(byte*) temp_user, temp_len)))
428 429
    {
      uc->questions=0;
430
      get_mqh(temp_user,&temp_user[lu->user.length+1],uc);
431 432
      uc->updates=0;
      uc->conn_per_hour=0;
433 434
    }
  }
435
  else // for FLUSH PRIVILEGES and FLUSH USER_RESOURCES
436
  {
unknown's avatar
unknown committed
437
    for (uint idx=0;idx < hash_user_connections.records; idx++)
438
    {
439 440 441 442 443 444
      USER_CONN *uc=(struct user_conn *) hash_element(&hash_user_connections, idx);
      if (get_them)
	get_mqh(uc->user,uc->host,uc);
      uc->questions=0;
      uc->updates=0;
      uc->conn_per_hour=0;
445 446
    }
  }
unknown's avatar
unknown committed
447
  (void) pthread_mutex_unlock(&LOCK_user_conn);
448
}
unknown's avatar
unknown committed
449

unknown's avatar
unknown committed
450

unknown's avatar
unknown committed
451
/*
unknown's avatar
unknown committed
452 453
  Check connnetion and get priviliges
  Returns 0 on ok, -1 < if error is given > 0 on error.
unknown's avatar
unknown committed
454 455 456 457 458 459 460
*/

static int
check_connections(THD *thd)
{
  uint connect_errors=0;
  NET *net= &thd->net;
unknown's avatar
unknown committed
461
  /* Store the connection details */
unknown's avatar
unknown committed
462 463
  DBUG_PRINT("info", (("check_connections called by thread %d"),
	     thd->thread_id));
unknown's avatar
unknown committed
464
  DBUG_PRINT("info",("New connection received on %s",
unknown's avatar
unknown committed
465 466 467
			vio_description(net->vio)));
  if (!thd->host)                           // If TCP/IP connection
  {
468
    char ip[30];
469

unknown's avatar
unknown committed
470 471 472 473
    if (vio_peer_addr(net->vio,ip))
      return (ER_BAD_HOST_ERROR);
    if (!(thd->ip = my_strdup(ip,MYF(0))))
      return (ER_OUT_OF_RESOURCES);
474
    thd->host_or_ip=thd->ip;
unknown's avatar
unknown committed
475 476 477
#if !defined(HAVE_SYS_UN_H) || defined(HAVE_mit_thread)
    /* Fast local hostname resolve for Win32 */
    if (!strcmp(thd->ip,"127.0.0.1"))
478
      thd->host=(char*) localhost;
unknown's avatar
unknown committed
479 480 481 482 483 484 485 486 487
    else
#endif
    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);
      if (connect_errors > max_connect_errors)
	return(ER_HOST_IS_BLOCKED);
    }
unknown's avatar
unknown committed
488 489 490
    DBUG_PRINT("info",("Host: %s  ip: %s",
		       thd->host ? thd->host : "unknown host",
		       thd->ip ? thd->ip : "unknown ip"));
unknown's avatar
unknown committed
491 492 493
    if (acl_check_host(thd->host,thd->ip))
      return(ER_HOST_NOT_PRIVILEGED);
  }
494
  else /* Hostname given means that the connection was on a socket */
unknown's avatar
unknown committed
495
  {
unknown's avatar
unknown committed
496
    DBUG_PRINT("info",("Host: %s",thd->host));
497
    thd->host_or_ip=thd->host;
unknown's avatar
unknown committed
498 499 500 501 502
    thd->ip=0;
    bzero((char*) &thd->remote,sizeof(struct sockaddr));
  }
  vio_keepalive(net->vio, TRUE);

unknown's avatar
unknown committed
503
  ulong pkt_len=0;
unknown's avatar
unknown committed
504
  {
unknown's avatar
unknown committed
505 506
    /* buff[] needs to big enough to hold the server_version variable */
    char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH+32],*end;
unknown's avatar
unknown committed
507
    int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB | CLIENT_PROTOCOL_41;
unknown's avatar
unknown committed
508

509 510 511 512 513
    if (opt_using_transactions)
      client_flags|=CLIENT_TRANSACTIONS;
#ifdef HAVE_COMPRESS
    client_flags |= CLIENT_COMPRESS;
#endif /* HAVE_COMPRESS */
unknown's avatar
unknown committed
514 515 516 517
#ifdef HAVE_OPENSSL
    if (ssl_acceptor_fd)
      client_flags |= CLIENT_SSL;       /* Wow, SSL is avalaible! */
#endif /* HAVE_OPENSSL */
unknown's avatar
unknown committed
518

unknown's avatar
unknown committed
519
    end=strnmov(buff,server_version,SERVER_VERSION_LENGTH)+1;
unknown's avatar
unknown committed
520 521 522 523 524
    int4store((uchar*) end,thd->thread_id);
    end+=4;
    memcpy(end,thd->scramble,SCRAMBLE_LENGTH+1);
    end+=SCRAMBLE_LENGTH +1;
    int2store(end,client_flags);
unknown's avatar
unknown committed
525
    end[2]=(char) MY_CHARSET_CURRENT;
unknown's avatar
unknown committed
526 527 528
    int2store(end+3,thd->server_status);
    bzero(end+5,13);
    end+=18;
529
    if (net_write_command(net,(uchar) protocol_version, "", 0, buff,
unknown's avatar
unknown committed
530
			  (uint) (end-buff)) ||
unknown's avatar
unknown committed
531
       (pkt_len= my_net_read(net)) == packet_error ||
unknown's avatar
unknown committed
532 533 534 535 536 537 538 539 540 541 542
	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);
unknown's avatar
unknown committed
543
  if (thd->packet.alloc(thd->variables.net_buffer_length))
unknown's avatar
unknown committed
544 545 546
    return(ER_OUT_OF_RESOURCES);

  thd->client_capabilities=uint2korr(net->read_pos);
547 548
  if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
    thd->sql_mode|= MODE_IGNORE_SPACE;
unknown's avatar
unknown committed
549
#ifdef HAVE_OPENSSL
unknown's avatar
unknown committed
550
  DBUG_PRINT("info", ("client capabilities: %d", thd->client_capabilities));
unknown's avatar
unknown committed
551 552 553 554
  if (thd->client_capabilities & CLIENT_SSL)
  {
    /* Do the SSL layering. */
    DBUG_PRINT("info", ("IO layer change in progress..."));
unknown's avatar
unknown committed
555
    sslaccept(ssl_acceptor_fd, net->vio, thd->variables.net_wait_timeout);
unknown's avatar
unknown committed
556 557 558 559
    DBUG_PRINT("info", ("Reading user information over SSL layer"));
    if ((pkt_len=my_net_read(net)) == packet_error ||
	pkt_len < NORMAL_HANDSHAKE_SIZE)
    {
unknown's avatar
unknown committed
560 561
      DBUG_PRINT("error", ("Failed to read user information (pkt_len= %lu)",
			   pkt_len));
unknown's avatar
unknown committed
562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
  }
  else
  {
    DBUG_PRINT("info", ("Leaving IO layer intact"));
    if (pkt_len < NORMAL_HANDSHAKE_SIZE)
    {
      inc_host_errors(&thd->remote.sin_addr);
      return ER_HANDSHAKE_ERROR;
    }
  }
#endif

unknown's avatar
unknown committed
577
  thd->max_client_packet_length=uint3korr(net->read_pos+2);
unknown's avatar
unknown committed
578 579 580 581 582 583 584 585
  char *user=   (char*) net->read_pos+5;
  char *passwd= strend(user)+1;
  char *db=0;
  if (passwd[0] && strlen(passwd) != SCRAMBLE_LENGTH)
    return ER_HANDSHAKE_ERROR;
  if (thd->client_capabilities & CLIENT_CONNECT_WITH_DB)
    db=strend(passwd)+1;
  if (thd->client_capabilities & CLIENT_INTERACTIVE)
unknown's avatar
unknown committed
586
    thd->variables.net_wait_timeout= thd->variables.net_interactive_timeout;
587 588
  if ((thd->client_capabilities & CLIENT_TRANSACTIONS) &&
      opt_using_transactions)
unknown's avatar
unknown committed
589
    thd->net.return_status= &thd->server_status;
unknown's avatar
unknown committed
590
  net->read_timeout=(uint) thd->variables.net_read_timeout;
unknown's avatar
unknown committed
591 592 593 594 595 596 597 598 599 600 601
  if (check_user(thd,COM_CONNECT, user, passwd, db, 1))
    return (-1);
  thd->password=test(passwd[0]);
  return 0;
}


pthread_handler_decl(handle_one_connection,arg)
{
  THD *thd=(THD*) arg;
  uint launch_time  =
unknown's avatar
unknown committed
602
    (uint) ((thd->thr_create_time = time(NULL)) - thd->connect_time);
unknown's avatar
unknown committed
603 604 605 606 607
  if (launch_time >= slow_launch_time)
    statistic_increment(slow_launch_threads,&LOCK_status );

  pthread_detach_this_thread();

608 609
#if !defined( __WIN__) && !defined(OS2)	// Win32 calls this in pthread_create
  // The following calls needs to be done before we call DBUG_ macros
610
  if (!(test_flags & TEST_NO_THREADS) & my_thread_init())
unknown's avatar
unknown committed
611 612
  {
    close_connection(&thd->net,ER_OUT_OF_RESOURCES);
613
    statistic_increment(aborted_connects,&LOCK_status);
unknown's avatar
unknown committed
614 615 616 617 618
    end_thread(thd,0);
    return 0;
  }
#endif

619 620 621 622 623 624 625
  /*
    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.
  */
unknown's avatar
unknown committed
626 627 628 629
  DBUG_PRINT("info", ("handle_one_connection called by thread %d\n",
		      thd->thread_id));
  // now that we've called my_thread_init(), it is safe to call DBUG_*

unknown's avatar
unknown committed
630
#if defined(__WIN__)
unknown's avatar
unknown committed
631
  init_signals();				// IRENA; testing ?
unknown's avatar
unknown committed
632
#elif !defined(OS2)
unknown's avatar
unknown committed
633 634 635 636 637 638 639
  sigset_t set;
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
  if (thd->store_globals())
  {
    close_connection(&thd->net,ER_OUT_OF_RESOURCES);
640
    statistic_increment(aborted_connects,&LOCK_status);
unknown's avatar
unknown committed
641 642 643 644 645 646 647 648 649 650 651 652 653
    end_thread(thd,0);
    return 0;
  }

  do
  {
    int error;
    NET *net= &thd->net;
    thd->thread_stack= (char*) &thd;

    if ((error=check_connections(thd)))
    {						// Wrong permissions
      if (error > 0)
654
	net_printf(thd,error,thd->host_or_ip);
unknown's avatar
unknown committed
655 656 657 658
#ifdef __NT__
      if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
	sleep(1);				/* must wait after eof() */
#endif
659
      statistic_increment(aborted_connects,&LOCK_status);
unknown's avatar
unknown committed
660 661 662
      goto end_thread;
    }

unknown's avatar
unknown committed
663
    if ((ulong) thd->variables.max_join_size == (ulong) HA_POS_ERROR)
unknown's avatar
unknown committed
664 665 666 667
      thd->options |= OPTION_BIG_SELECTS;
    if (thd->client_capabilities & CLIENT_COMPRESS)
      net->compress=1;				// Use compression

unknown's avatar
unknown committed
668
    thd->proc_info=0;				// Remove 'login'
669
    thd->command=COM_SLEEP;
unknown's avatar
unknown committed
670 671
    thd->version=refresh_version;
    thd->set_time();
672 673 674
    init_sql_alloc(&thd->mem_root, MEM_ROOT_BLOCK_SIZE, MEM_ROOT_PREALLOC);
    init_sql_alloc(&thd->transaction.mem_root,
		   TRANS_MEM_ROOT_BLOCK_SIZE, TRANS_MEM_ROOT_PREALLOC);
unknown's avatar
unknown committed
675 676 677 678 679
    while (!net->error && net->vio != 0 && !thd->killed)
    {
      if (do_command(thd))
	break;
    }
680 681
    if (thd->user_connect)
      decrease_user_connections(thd->user_connect);
682
    free_root(&thd->mem_root,MYF(0));
unknown's avatar
unknown committed
683
    if (net->error && net->vio != 0 && net->report_error)
unknown's avatar
unknown committed
684
    {
unknown's avatar
unknown committed
685
      if (!thd->killed && thd->variables.log_warnings)
686 687 688 689 690 691
	sql_print_error(ER(ER_NEW_ABORTING_CONNECTION),
			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)));
692
      send_error(thd,net->last_errno,NullS);
693
      thread_safe_increment(aborted_threads,&LOCK_status);
unknown's avatar
unknown committed
694
    }
695
    
unknown's avatar
unknown committed
696 697 698 699 700 701 702 703 704 705 706 707 708
end_thread:
    close_connection(net);
    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 */
}

709 710 711 712
/*
  Execute commands from bootstrap_file.
  Used when creating the initial grant tables
*/
unknown's avatar
unknown committed
713

714
pthread_handler_decl(handle_bootstrap,arg)
unknown's avatar
unknown committed
715
{
716 717 718
  THD *thd=(THD*) arg;
  FILE *file=bootstrap_file;
  char *buff;
unknown's avatar
unknown committed
719

720
  /* The following must be called before DBUG_ENTER */
721
  if (my_thread_init() || thd->store_globals())
unknown's avatar
unknown committed
722 723
  {
    close_connection(&thd->net,ER_OUT_OF_RESOURCES);
724 725
    thd->fatal_error=1;
    goto end;
unknown's avatar
unknown committed
726
  }
727 728 729 730
  DBUG_ENTER("handle_bootstrap");

  pthread_detach_this_thread();
  thd->thread_stack= (char*) &thd;
unknown's avatar
unknown committed
731
#if !defined(__WIN__) && !defined(OS2)
unknown's avatar
unknown committed
732
  sigset_t set;
733 734 735 736
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));


unknown's avatar
unknown committed
737 738
#endif

unknown's avatar
unknown committed
739
  if ((ulong) thd->variables.max_join_size == (ulong) HA_POS_ERROR)
unknown's avatar
unknown committed
740 741 742 743
    thd->options |= OPTION_BIG_SELECTS;

  thd->proc_info=0;
  thd->version=refresh_version;
744
  thd->priv_user=thd->user=(char*) my_strdup("boot", MYF(MY_WME));
unknown's avatar
unknown committed
745

746
  buff= (char*) thd->net.buff;
747 748 749
  init_sql_alloc(&thd->mem_root, MEM_ROOT_BLOCK_SIZE, MEM_ROOT_PREALLOC);
  init_sql_alloc(&thd->transaction.mem_root,
		 TRANS_MEM_ROOT_BLOCK_SIZE, TRANS_MEM_ROOT_PREALLOC);
unknown's avatar
unknown committed
750 751
  while (fgets(buff, thd->net.max_packet, file))
  {
unknown's avatar
unknown committed
752
    uint length=(uint) strlen(buff);
753 754
    while (length && (my_isspace(system_charset_info, buff[length-1]) || 
           buff[length-1] == ';'))
unknown's avatar
unknown committed
755 756 757
      length--;
    buff[length]=0;
    thd->current_tablenr=0;
758
    thd->query_length=length;
unknown's avatar
unknown committed
759 760
    thd->query= thd->memdup_w_gap(buff, length+1, thd->db_length+1);
    thd->query[length] = '\0';
unknown's avatar
unknown committed
761
    thd->query_id=query_id++;
762
    if (mqh_used && thd->user_connect && check_mqh(thd, SQLCOM_END))
763 764 765 766 767 768
    {
      thd->net.error = 0;
      close_thread_tables(thd);			// Free tables
      free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
      break;
    }
unknown's avatar
unknown committed
769 770 771
    mysql_parse(thd,thd->query,length);
    close_thread_tables(thd);			// Free tables
    if (thd->fatal_error)
772
      break;
773
    free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
774
    free_root(&thd->transaction.mem_root,MYF(MY_KEEP_PREALLOC));
unknown's avatar
unknown committed
775
  }
776 777 778 779 780 781

  /* thd->fatal_error should be set in case something went wrong */
end:
  (void) pthread_mutex_lock(&LOCK_thread_count);
  thread_count--;
  (void) pthread_mutex_unlock(&LOCK_thread_count);
782
  (void) pthread_cond_broadcast(&COND_thread_count);
783 784 785
  my_thread_end();
  pthread_exit(0);
  DBUG_RETURN(0);				// Never reached
unknown's avatar
unknown committed
786 787
}

788
    /* This works because items are allocated with sql_alloc() */
unknown's avatar
unknown committed
789

790
void free_items(Item *item)
unknown's avatar
unknown committed
791
{
792
  for (; item ; item=item->next)
unknown's avatar
unknown committed
793 794 795 796 797 798 799 800 801 802
    delete item;
}

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;
803
  if (!(table_list = (TABLE_LIST*) thd->calloc(sizeof(TABLE_LIST))))
unknown's avatar
unknown committed
804
    DBUG_RETURN(1); // out of memory
unknown's avatar
unknown committed
805
  table_list->db = db;
806
  table_list->real_name = table_list->alias = tbl_name;
unknown's avatar
unknown committed
807 808 809
  table_list->lock_type = TL_READ_NO_INSERT;
  table_list->next = 0;
  remove_escape(table_list->real_name);
unknown's avatar
unknown committed
810

811
  if (!(table=open_ltable(thd, table_list, TL_READ_NO_INSERT)))
unknown's avatar
unknown committed
812 813
    DBUG_RETURN(1);

814 815
  if (!db || check_db_name(db))
  {
816
    net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
817 818
    goto err;
  }
819
  if (check_access(thd, SELECT_ACL, db, &table_list->grant.privilege))
unknown's avatar
unknown committed
820
    goto err;
821
  if (grant_option && check_grant(thd, SELECT_ACL, table_list))
unknown's avatar
unknown committed
822 823 824
    goto err;

  thd->free_list = 0;
unknown's avatar
unknown committed
825
  thd->query_length=(uint) strlen(tbl_name);
unknown's avatar
unknown committed
826
  thd->query = tbl_name;
827 828 829 830 831
  if ((error = mysqld_dump_create_info(thd, table, -1)))
  {
    my_error(ER_GET_ERRNO, MYF(0));
    goto err;
  }
unknown's avatar
unknown committed
832
  net_flush(&thd->net);
833 834
  if ((error = table->file->dump(thd,fd)))
    my_error(ER_GET_ERRNO, MYF(0));
unknown's avatar
unknown committed
835

unknown's avatar
unknown committed
836 837
err:
  close_thread_tables(thd);
unknown's avatar
unknown committed
838
  DBUG_RETURN(error);
unknown's avatar
unknown committed
839 840 841 842 843 844 845 846
}


	/* Execute one command from socket (query or simple command) */

bool do_command(THD *thd)
{
  char *packet;
unknown's avatar
unknown committed
847 848
  uint old_timeout;
  ulong packet_length;
unknown's avatar
unknown committed
849 850 851 852 853 854 855 856
  NET *net;
  enum enum_server_command command;
  DBUG_ENTER("do_command");

  net= &thd->net;
  thd->current_tablenr=0;

  packet=0;
unknown's avatar
unknown committed
857 858 859
  old_timeout=net->read_timeout;
  // Wait max for 8 hours
  net->read_timeout=(uint) thd->variables.net_wait_timeout;
unknown's avatar
unknown committed
860
  thd->clear_error();				// Clear error message
unknown's avatar
unknown committed
861 862 863 864

  net_new_transaction(net);
  if ((packet_length=my_net_read(net)) == packet_error)
  {
unknown's avatar
unknown committed
865 866
     DBUG_PRINT("info",("Got error reading command from socket %s",
			vio_description(net->vio) ));
unknown's avatar
unknown committed
867 868 869 870 871 872
    return TRUE;
  }
  else
  {
    packet=(char*) net->read_pos;
    command = (enum enum_server_command) (uchar) packet[0];
unknown's avatar
unknown committed
873 874 875
    DBUG_PRINT("info",("Command on %s = %d (%s)",
		       vio_description(net->vio), command,
		       command_name[command]));
unknown's avatar
unknown committed
876
  }
unknown's avatar
unknown committed
877
  net->read_timeout=old_timeout;		// restore it
unknown's avatar
unknown committed
878
  DBUG_RETURN(dispatch_command(command,thd, packet+1, (uint) packet_length));
879 880 881 882 883 884 885 886
}


bool dispatch_command(enum enum_server_command command, THD *thd,
		      char* packet, uint packet_length)
{
  NET *net= &thd->net;
  bool	error=0;
unknown's avatar
unknown committed
887 888 889 890
  /*
    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
  */
891 892 893
  bool slow_command=FALSE;
  DBUG_ENTER("dispatch_command");

unknown's avatar
unknown committed
894
  thd->command=command;
unknown's avatar
unknown committed
895
  thd->set_time();
unknown's avatar
unknown committed
896 897 898 899 900 901
  VOID(pthread_mutex_lock(&LOCK_thread_count));
  thd->query_id=query_id;
  if (command != COM_STATISTICS && command != COM_PING)
    query_id++;
  thread_running++;
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
unknown's avatar
unknown committed
902

903
  thd->lex.select_lex.options=0;		// We store status here
904
  switch (command) {
unknown's avatar
unknown committed
905
  case COM_INIT_DB:
906
    thread_safe_increment(com_stat[SQLCOM_CHANGE_DB],&LOCK_status);
907
    if (!mysql_change_db(thd,packet))
908
      mysql_log.write(thd,command,"%s",thd->db);
unknown's avatar
unknown committed
909
    break;
910 911
  case COM_REGISTER_SLAVE:
  {
912
    if (!register_slave(thd, (uchar*)packet, packet_length))
913
      send_ok(thd);
914 915
    break;
  }
unknown's avatar
unknown committed
916 917
  case COM_TABLE_DUMP:
    {
918
      thread_safe_increment(com_other, &LOCK_status);
919
      slow_command = TRUE;
920 921
      uint db_len = *(uchar*)packet;
      uint tbl_len = *(uchar*)(packet + db_len + 1);
922
      char* db = thd->alloc(db_len + tbl_len + 2);
923
      memcpy(db, packet + 1, db_len);
unknown's avatar
unknown committed
924 925
      char* tbl_name = db + db_len;
      *tbl_name++ = 0;
926
      memcpy(tbl_name, packet + db_len + 2, tbl_len);
unknown's avatar
unknown committed
927
      tbl_name[tbl_len] = 0;
unknown's avatar
unknown committed
928
      if (mysql_table_dump(thd, db, tbl_name, -1))
929
	send_error(thd); // dump to NET
unknown's avatar
unknown committed
930

unknown's avatar
unknown committed
931 932 933 934
      break;
    }
  case COM_CHANGE_USER:
  {
935
    thread_safe_increment(com_other,&LOCK_status);
936
    char *user=   (char*) packet;
unknown's avatar
unknown committed
937 938 939 940 941 942
    char *passwd= strend(user)+1;
    char *db=     strend(passwd)+1;

    /* Save user and privileges */
    uint save_master_access=thd->master_access;
    uint save_db_access=    thd->db_access;
unknown's avatar
unknown committed
943
    uint save_db_length=    thd->db_length;
unknown's avatar
unknown committed
944 945 946
    char *save_user=	    thd->user;
    char *save_priv_user=   thd->priv_user;
    char *save_db=	    thd->db;
947
    USER_CONN *save_uc=            thd->user_connect;
unknown's avatar
unknown committed
948 949 950

    if ((uint) ((uchar*) db - net->read_pos) > packet_length)
    {						// Check if protocol is ok
951
      send_error(thd, ER_UNKNOWN_COM_ERROR);
unknown's avatar
unknown committed
952 953
      break;
    }
unknown's avatar
unknown committed
954
    if (check_user(thd, COM_CHANGE_USER, user, passwd, db, 0))
unknown's avatar
unknown committed
955 956 957 958 959 960
    {						// Restore old user
      x_free(thd->user);
      x_free(thd->db);
      thd->master_access=save_master_access;
      thd->db_access=save_db_access;
      thd->db=save_db;
unknown's avatar
unknown committed
961
      thd->db_length=save_db_length;
unknown's avatar
unknown committed
962 963 964 965
      thd->user=save_user;
      thd->priv_user=save_priv_user;
      break;
    }
966
    if (max_connections && save_uc)
unknown's avatar
unknown committed
967
      decrease_user_connections(save_uc);
unknown's avatar
unknown committed
968 969 970 971 972
    x_free((gptr) save_db);
    x_free((gptr) save_user);
    thd->password=test(passwd[0]);
    break;
  }
unknown's avatar
unknown committed
973 974
  case COM_EXECUTE:
  {
975
    mysql_stmt_execute(thd, packet);
unknown's avatar
unknown committed
976 977 978 979
    break;
  }
  case COM_LONG_DATA:
  {
980
    mysql_stmt_get_longdata(thd, packet, packet_length);
unknown's avatar
unknown committed
981 982 983 984
    break;
  }
  case COM_PREPARE:
  {
985
    mysql_stmt_prepare(thd, packet, packet_length);
unknown's avatar
unknown committed
986 987
    break;
  }
unknown's avatar
unknown committed
988 989
  case COM_QUERY:
  {
990 991
    if (alloc_query(thd, packet, packet_length))
      break;					// fatal error is set
992
    mysql_log.write(thd,command,"%s",thd->query);
unknown's avatar
unknown committed
993
    DBUG_PRINT("query",("%s",thd->query));
994
    mysql_parse(thd,thd->query, thd->query_length);
unknown's avatar
unknown committed
995 996 997 998 999
    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),WAIT_PRIOR);
    DBUG_PRINT("info",("query ready"));
    break;
  }
1000
  case COM_FIELD_LIST:				// This isn't actually needed
unknown's avatar
unknown committed
1001
#ifdef DONT_ALLOW_SHOW_COMMANDS
1002
    send_error(thd,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
unknown's avatar
unknown committed
1003 1004 1005 1006 1007
    break;
#else
  {
    char *fields;
    TABLE_LIST table_list;
1008
    thread_safe_increment(com_stat[SQLCOM_SHOW_FIELDS],&LOCK_status);
unknown's avatar
unknown committed
1009 1010 1011
    bzero((char*) &table_list,sizeof(table_list));
    if (!(table_list.db=thd->db))
    {
1012
      send_error(thd,ER_NO_DB_ERROR);
unknown's avatar
unknown committed
1013 1014 1015
      break;
    }
    thd->free_list=0;
1016
    table_list.alias= table_list.real_name= thd->strdup(packet);
unknown's avatar
unknown committed
1017
    packet=strend(packet)+1;
unknown's avatar
unknown committed
1018
    // command not cachable => no gap for data base name
unknown's avatar
unknown committed
1019 1020
    if (!(thd->query=fields=thd->memdup(packet,thd->query_length+1)))
      break;
1021
    mysql_log.write(thd,command,"%s %s",table_list.real_name,fields);
unknown's avatar
unknown committed
1022 1023 1024 1025 1026 1027 1028 1029
    remove_escape(table_list.real_name);	// This can't have wildcards

    if (check_access(thd,SELECT_ACL,table_list.db,&thd->col_access))
      break;
    table_list.grant.privilege=thd->col_access;
    if (grant_option && check_grant(thd,SELECT_ACL,&table_list,2))
      break;
    mysqld_list_fields(thd,&table_list,fields);
1030
    free_items(thd->free_list);
unknown's avatar
unknown committed
1031 1032 1033 1034
    break;
  }
#endif
  case COM_QUIT:
1035
    /* We don't calculate statistics for this command */
1036
    mysql_log.write(thd,command,NullS);
unknown's avatar
unknown committed
1037 1038 1039 1040
    net->error=0;				// Don't give 'abort' message
    error=TRUE;					// End server
    break;

unknown's avatar
unknown committed
1041
  case COM_CREATE_DB:				// QQ: To be removed
unknown's avatar
unknown committed
1042
    {
1043
      thread_safe_increment(com_stat[SQLCOM_CREATE_DB],&LOCK_status);
1044
      char *db=thd->strdup(packet);
1045
      // null test to handle EOM
unknown's avatar
unknown committed
1046
      if (!db || !strip_sp(db) || check_db_name(db))
1047
      {
1048
	net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
1049 1050
	break;
      }
1051
      if (lower_case_table_names)
1052
	my_casedn_str(system_charset_info, db);
unknown's avatar
unknown committed
1053 1054
      if (check_access(thd,CREATE_ACL,db,0,1))
	break;
1055
      mysql_log.write(thd,command,packet);
unknown's avatar
unknown committed
1056
      mysql_create_db(thd,db,0,0);
unknown's avatar
unknown committed
1057 1058
      break;
    }
unknown's avatar
unknown committed
1059
  case COM_DROP_DB:				// QQ: To be removed
unknown's avatar
unknown committed
1060
    {
1061
      thread_safe_increment(com_stat[SQLCOM_DROP_DB],&LOCK_status);
1062
      char *db=thd->strdup(packet);
1063
      // null test to handle EOM
unknown's avatar
unknown committed
1064
      if (!db || !strip_sp(db) || check_db_name(db))
1065
      {
1066
	net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
1067 1068
	break;
      }
1069
      if (lower_case_table_names)
1070
	my_casedn_str(system_charset_info, db);
unknown's avatar
unknown committed
1071 1072
      if (thd->locked_tables || thd->active_transaction())
      {
1073
	send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
unknown's avatar
unknown committed
1074
	break;
unknown's avatar
unknown committed
1075
      }
1076
      mysql_log.write(thd,command,db);
unknown's avatar
unknown committed
1077
      mysql_rm_db(thd,db,0,0);
unknown's avatar
unknown committed
1078 1079 1080 1081
      break;
    }
  case COM_BINLOG_DUMP:
    {
1082
      thread_safe_increment(com_other,&LOCK_status);
1083
      slow_command = TRUE;
unknown's avatar
unknown committed
1084
      if (check_global_access(thd, REPL_SLAVE_ACL))
unknown's avatar
unknown committed
1085
	break;
1086
      mysql_log.write(thd,command, 0);
unknown's avatar
unknown committed
1087

unknown's avatar
unknown committed
1088 1089
      ulong pos;
      ushort flags;
1090
      uint32 slave_server_id;
1091
      /* TODO: The following has to be changed to an 8 byte integer */
1092 1093
      pos = uint4korr(packet);
      flags = uint2korr(packet + 4);
unknown's avatar
unknown committed
1094
      thd->server_id=0; /* avoid suicide */
1095
      kill_zombie_dump_threads(slave_server_id = uint4korr(packet+6));
1096
      thd->server_id = slave_server_id;
1097
      mysql_binlog_send(thd, thd->strdup(packet + 10), (my_off_t) pos, flags);
unknown's avatar
unknown committed
1098
      unregister_slave(thd,1,1);
1099 1100 1101
      // fake COM_QUIT -- if we get here, the thread needs to terminate
      error = TRUE;
      net->error = 0;
unknown's avatar
unknown committed
1102 1103 1104 1105
      break;
    }
  case COM_REFRESH:
    {
1106
      thread_safe_increment(com_stat[SQLCOM_FLUSH],&LOCK_status);
unknown's avatar
unknown committed
1107
      ulong options= (ulong) (uchar) packet[0];
unknown's avatar
unknown committed
1108
      if (check_global_access(thd,RELOAD_ACL))
unknown's avatar
unknown committed
1109
	break;
1110
      mysql_log.write(thd,command,NullS);
unknown's avatar
unknown committed
1111
      if (reload_acl_and_cache(thd, options, (TABLE_LIST*) 0))
1112
	send_error(thd,0);
unknown's avatar
unknown committed
1113
      else
1114
	send_eof(thd);
unknown's avatar
unknown committed
1115 1116 1117
      break;
    }
  case COM_SHUTDOWN:
1118
    thread_safe_increment(com_other,&LOCK_status);
unknown's avatar
unknown committed
1119
    if (check_global_access(thd,SHUTDOWN_ACL))
unknown's avatar
unknown committed
1120 1121
      break; /* purecov: inspected */
    DBUG_PRINT("quit",("Got shutdown command"));
1122
    mysql_log.write(thd,command,NullS);
1123
    send_eof(thd);
unknown's avatar
unknown committed
1124 1125 1126
#ifdef __WIN__
    sleep(1);					// must wait after eof()
#endif
unknown's avatar
unknown committed
1127
#ifndef OS2
1128
    send_eof(thd);				// This is for 'quit request'
unknown's avatar
unknown committed
1129
#endif
unknown's avatar
unknown committed
1130 1131
    close_connection(net);
    close_thread_tables(thd);			// Free before kill
1132
    free_root(&thd->mem_root,MYF(0));
1133
    free_root(&thd->transaction.mem_root,MYF(0));
unknown's avatar
unknown committed
1134 1135 1136 1137 1138 1139
    kill_mysql();
    error=TRUE;
    break;

  case COM_STATISTICS:
  {
1140
    mysql_log.write(thd,command,NullS);
1141
    thread_safe_increment(com_stat[SQLCOM_SHOW_STATUS],&LOCK_status);
unknown's avatar
unknown committed
1142
    char buff[200];
1143
    ulong uptime = (ulong) (thd->start_time - start_time);
unknown's avatar
unknown committed
1144
    sprintf((char*) buff,
1145
	    "Uptime: %ld  Threads: %d  Questions: %lu  Slow queries: %ld  Opens: %ld  Flush tables: %ld  Open tables: %u  Queries per second avg: %.3f",
unknown's avatar
unknown committed
1146 1147 1148 1149 1150 1151 1152 1153 1154
	    uptime,
	    (int) thread_count,thd->query_id,long_query_count,
	    opened_tables,refresh_version, cached_tables(),
	    uptime ? (float)thd->query_id/(float)uptime : 0);
#ifdef SAFEMALLOC
    if (lCurMemory)				// Using SAFEMALLOC
      sprintf(strend(buff), "  Memory in use: %ldK  Max memory used: %ldK",
	      (lCurMemory+1023L)/1024L,(lMaxMemory+1023L)/1024L);
 #endif
unknown's avatar
unknown committed
1155
    VOID(my_net_write(net, buff,(uint) strlen(buff)));
unknown's avatar
unknown committed
1156 1157 1158 1159
    VOID(net_flush(net));
    break;
  }
  case COM_PING:
1160
    thread_safe_increment(com_other,&LOCK_status);
1161
    send_ok(thd);				// Tell client we are alive
unknown's avatar
unknown committed
1162 1163
    break;
  case COM_PROCESS_INFO:
1164
    thread_safe_increment(com_stat[SQLCOM_SHOW_PROCESSLIST],&LOCK_status);
unknown's avatar
unknown committed
1165
    if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
unknown's avatar
unknown committed
1166
      break;
1167
    mysql_log.write(thd,command,NullS);
unknown's avatar
unknown committed
1168 1169 1170 1171 1172
    mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
			  thd->priv_user,0);
    break;
  case COM_PROCESS_KILL:
  {
1173
    thread_safe_increment(com_stat[SQLCOM_KILL],&LOCK_status);
1174
    ulong id=(ulong) uint4korr(packet);
unknown's avatar
unknown committed
1175 1176 1177 1178
    kill_one_thread(thd,id);
    break;
  }
  case COM_DEBUG:
1179
    thread_safe_increment(com_other,&LOCK_status);
unknown's avatar
unknown committed
1180
    if (check_global_access(thd, SUPER_ACL))
unknown's avatar
unknown committed
1181 1182
      break;					/* purecov: inspected */
    mysql_print_status(thd);
1183
    mysql_log.write(thd,command,NullS);
1184
    send_eof(thd);
unknown's avatar
unknown committed
1185 1186 1187 1188 1189 1190
    break;
  case COM_SLEEP:
  case COM_CONNECT:				// Impossible here
  case COM_TIME:				// Impossible from client
  case COM_DELAYED_INSERT:
  default:
1191
    send_error(thd, ER_UNKNOWN_COM_ERROR);
unknown's avatar
unknown committed
1192 1193 1194 1195 1196 1197 1198 1199 1200
    break;
  }
  if (thd->lock || thd->open_tables)
  {
    thd->proc_info="closing tables";
    close_thread_tables(thd);			/* Free tables */
  }

  if (thd->fatal_error)
1201
    send_error(thd,0);				// End of memory ?
unknown's avatar
unknown committed
1202 1203

  time_t start_of_query=thd->start_time;
1204
  thd->end_time();				// Set start time
1205

1206
  /* If not reading from backup and if the query took too long */
1207
  if (!slow_command && !thd->user_time) // do not log 'slow_command' queries
unknown's avatar
unknown committed
1208
  {
1209 1210
    thd->proc_info="logging slow query";

1211 1212
    if ((ulong) (thd->start_time - thd->time_after_lock) >
	thd->variables.long_query_time ||
1213
	((thd->lex.select_lex.options &
1214
	  (QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED)) &&
1215
	 (specialflag & SPECIAL_LONG_LOG_FORMAT)))
1216 1217 1218 1219
    {
      long_query_count++;
      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
    }
unknown's avatar
unknown committed
1220
  }
1221
  thd->proc_info="cleaning up";
unknown's avatar
unknown committed
1222 1223 1224 1225 1226 1227
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For process list
  thd->proc_info=0;
  thd->command=COM_SLEEP;
  thd->query=0;
  thread_running--;
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
unknown's avatar
unknown committed
1228
  thd->packet.shrink(thd->variables.net_buffer_length);	// Reclaim some memory
1229
  free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
unknown's avatar
unknown committed
1230 1231 1232
  DBUG_RETURN(error);
}

1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277

/*
  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
    0	ok
    1	error;  In this case thd->fatal_error is set
*/

bool alloc_query(THD *thd, char *packet, ulong packet_length)
{
  packet_length--;				// Remove end null
  /* Remove garage at start and end of query */
  while (my_isspace(system_charset_info,packet[0]) && packet_length > 0)
  {
    packet++;
    packet_length--;
  }
  char *pos=packet+packet_length;		// Point at end null
  while (packet_length > 0 && 
	 (pos[-1] == ';' || my_isspace(system_charset_info,pos[-1])))
  {
    pos--;
    packet_length--;
  }
  /* We must allocate some extra memory for query cache */
  if (!(thd->query= (char*) thd->memdup_w_gap((gptr) (packet),
					      packet_length,
					      thd->db_length+2)))
    return 1;
  thd->query[packet_length]=0;
  thd->query_length= packet_length;
  thd->packet.shrink(thd->variables.net_buffer_length);// Reclaim some memory

  if (!(specialflag & SPECIAL_NO_PRIOR))
    my_pthread_setprio(pthread_self(),QUERY_PRIOR);
  return 0;
}

unknown's avatar
unknown committed
1278 1279 1280 1281 1282 1283
/****************************************************************************
** mysql_execute_command
** Execute command saved in thd and current_lex->sql_command
****************************************************************************/

void
1284
mysql_execute_command(THD *thd)
unknown's avatar
unknown committed
1285
{
1286
  int	res= 0;
1287
  LEX	*lex= &thd->lex;
1288
  TABLE_LIST *tables= (TABLE_LIST*) lex->select_lex.table_list.first;
1289
  TABLE_LIST *cursor;
unknown's avatar
unknown committed
1290
  SELECT_LEX *select_lex= &lex->select_lex;
1291
  SELECT_LEX_UNIT *unit= &lex->unit;
unknown's avatar
unknown committed
1292 1293
  DBUG_ENTER("mysql_execute_command");

1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
  /*
    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.
  */
  if (tables)
    mysql_reset_errors(thd);
  /*
    Save old warning count to be able to send to client how many warnings we
    got
  */
  thd->old_total_warn_count= thd->total_warn_count;

unknown's avatar
unknown committed
1308
  thd->net.report_error= 0;
1309 1310
  if (thd->slave_thread)
  {
unknown's avatar
merge  
unknown committed
1311 1312 1313 1314 1315
    /* 
      Skip if we are in the slave thread, some table rules have been
      given and the table list says the query should not be replicated
    */
    if (table_rules_on && tables && !tables_ok(thd,tables))
1316
      DBUG_VOID_RETURN;
unknown's avatar
merge  
unknown committed
1317 1318 1319 1320 1321 1322
#ifndef TO_BE_DELETED
    /*
       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()
    */
1323 1324 1325
    if (lex->sql_command == SQLCOM_SELECT)
    {
      lex->sql_command = SQLCOM_DO;
unknown's avatar
unknown committed
1326
      lex->insert_list = &select_lex->item_list;
1327
    }
unknown's avatar
merge  
unknown committed
1328
#endif
1329
  }
1330
  
unknown's avatar
unknown committed
1331
  select_result *explain_result= 0;  
1332
  /*
unknown's avatar
unknown committed
1333 1334
    TODO: make derived tables processing 'inside' SELECT processing.
    TODO: solve problem with depended derived tables in subselects
1335
  */
unknown's avatar
unknown committed
1336
  if (lex->sql_command == SQLCOM_SELECT && 
unknown's avatar
unknown committed
1337
      lex->describe && lex->derived_tables)
unknown's avatar
unknown committed
1338 1339 1340
  {
    if (!(explain_result= new select_send()))
    {
unknown's avatar
unknown committed
1341
      send_error(thd, ER_OUT_OF_RESOURCES);
unknown's avatar
unknown committed
1342 1343 1344
      DBUG_VOID_RETURN;
    }
    //check rights
1345
    for (cursor= tables;
unknown's avatar
unknown committed
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
	 cursor;
	 cursor= cursor->next)
      if (cursor->derived)
      {
	TABLE_LIST *tables= 
	  (TABLE_LIST *)((SELECT_LEX_UNIT *)
			 cursor->derived)->first_select()->table_list.first;
	int res;
	if (tables)
	  res= check_table_access(thd,SELECT_ACL, tables);
	else
	  res= check_access(thd, SELECT_ACL, any_db);
	if (res)
	  DBUG_VOID_RETURN;
      }
    thd->send_explain_fields(explain_result);
    // EXPLAIN derived tables
1363
    for (cursor= tables;
unknown's avatar
unknown committed
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
	 cursor;
	 cursor= cursor->next)
      if (cursor->derived)
      {
	SELECT_LEX *select_lex= ((SELECT_LEX_UNIT *)
				 cursor->derived)->first_select();
	if (!open_and_lock_tables(thd, 
				  (TABLE_LIST*) select_lex->table_list.first))
	{
	  mysql_explain_select(thd, select_lex,
			       "DERIVED", explain_result);
	  // execute derived table SELECT to provide table for other SELECTs
	  if (mysql_derived(thd, lex, (SELECT_LEX_UNIT *)cursor->derived,
			    cursor, 1))
	    DBUG_VOID_RETURN;
	}
	else
	  DBUG_VOID_RETURN;
      }
      
  }
  else if (lex->derived_tables)
unknown's avatar
unknown committed
1386 1387 1388
  {
    for (TABLE_LIST *cursor= tables;
	 cursor;
unknown's avatar
unknown committed
1389
	 cursor= cursor->next)
unknown's avatar
unknown committed
1390
      if (cursor->derived && (res=mysql_derived(thd, lex,
unknown's avatar
unknown committed
1391
					   (SELECT_LEX_UNIT *)cursor->derived,
unknown's avatar
unknown committed
1392 1393 1394 1395
						cursor, 0)))
      {  
	if (res < 0)
	  send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
unknown's avatar
unknown committed
1396
	DBUG_VOID_RETURN;
unknown's avatar
unknown committed
1397
      }
unknown's avatar
unknown committed
1398
  }
1399
  if ((lex->select_lex.next_select_in_list() && 
1400
       lex->unit.create_total_list(thd, lex, &tables)) ||
unknown's avatar
unknown committed
1401 1402
      (table_rules_on && tables && thd->slave_thread &&
       !tables_ok(thd,tables)))
1403
    DBUG_VOID_RETURN;
1404

1405
  thread_safe_increment(com_stat[lex->sql_command],&LOCK_status);
unknown's avatar
unknown committed
1406 1407 1408
  switch (lex->sql_command) {
  case SQLCOM_SELECT:
  {
1409
    select_result *result=lex->result;
unknown's avatar
unknown committed
1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
    if (tables)
    {
      res=check_table_access(thd,
			     lex->exchange ? SELECT_ACL | FILE_ACL :
			     SELECT_ACL,
			     tables);
    }
    else
      res=check_access(thd, lex->exchange ? SELECT_ACL | FILE_ACL : SELECT_ACL,
		       any_db);
    if (res)
    {
      res=0;
      break;					// Error message is given
    }

unknown's avatar
unknown committed
1426 1427 1428 1429
    unit->offset_limit_cnt= unit->global_parameters->offset_limit;
    unit->select_limit_cnt= unit->global_parameters->select_limit+
      unit->global_parameters->offset_limit;
    if (unit->select_limit_cnt < unit->global_parameters->select_limit)
1430 1431
      unit->select_limit_cnt= HA_POS_ERROR;		// no limit
    if (unit->select_limit_cnt == HA_POS_ERROR)
1432
      select_lex->options&= ~OPTION_FOUND_ROWS;
unknown's avatar
unknown committed
1433 1434

    if (!(res=open_and_lock_tables(thd,tables)))
unknown's avatar
unknown committed
1435
    {
unknown's avatar
unknown committed
1436
      if (lex->describe)
unknown's avatar
unknown committed
1437 1438 1439 1440
      {
	if (!explain_result)
	  if (!(explain_result= new select_send()))
	  {
unknown's avatar
unknown committed
1441
	    send_error(thd, ER_OUT_OF_RESOURCES);
unknown's avatar
unknown committed
1442 1443 1444 1445 1446
	    DBUG_VOID_RETURN;
	  }
	  else
	    thd->send_explain_fields(explain_result);
	fix_tables_pointers(select_lex);
unknown's avatar
unknown committed
1447
	res= mysql_explain_union(thd, &thd->lex.unit, explain_result);
unknown's avatar
unknown committed
1448 1449 1450 1451 1452 1453 1454
	MYSQL_LOCK *save_lock= thd->lock;
	thd->lock= (MYSQL_LOCK *)0;
	explain_result->send_eof();
	thd->lock= save_lock;
      }
      else
      {
unknown's avatar
unknown committed
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477
	if (!result)
	{
	  if ((result=new select_send()))
	  {
	    /*
	      Normal select:
	      Change lock if we are using SELECT HIGH PRIORITY,
	      FOR UPDATE or IN SHARE MODE
	    */
	    TABLE_LIST *table;
	    for (table = tables ; table ; table=table->next)
	      table->lock_type= lex->lock_option;
	  }
	  else
	  {
	    res= -1;
#ifdef DELETE_ITEMS
	    delete select_lex->having;
	    delete select_lex->where;
#endif
	    break;
	  }
	}
unknown's avatar
unknown committed
1478 1479 1480
	query_cache_store_query(thd, tables);
	res=handle_select(thd, lex, result);
      }
unknown's avatar
unknown committed
1481
    }
unknown's avatar
unknown committed
1482 1483
    break;
  }
unknown's avatar
unknown committed
1484 1485 1486 1487
  case SQLCOM_DO:
    res=mysql_do(thd, *lex->insert_list);
    break;

1488
  case SQLCOM_EMPTY_QUERY:
1489
    send_ok(thd);
1490 1491
    break;

unknown's avatar
unknown committed
1492 1493 1494 1495
  case SQLCOM_HELP:
    res= mysqld_help(thd,lex->help_arg);
    break;

unknown's avatar
unknown committed
1496
  case SQLCOM_PURGE:
1497
  {
unknown's avatar
unknown committed
1498
    if (check_global_access(thd, SUPER_ACL))
1499 1500 1501 1502
      goto error;
    res = purge_master_logs(thd, lex->to_log);
    break;
  }
unknown's avatar
unknown committed
1503 1504
  case SQLCOM_SHOW_WARNS:
  {
1505 1506 1507
    res= mysqld_show_warnings(thd, (ulong)
			      ((1L << (uint) MYSQL_ERROR::WARN_LEVEL_NOTE) |
			       (1L << (uint) MYSQL_ERROR::WARN_LEVEL_WARN)));
unknown's avatar
unknown committed
1508 1509 1510 1511
    break;
  }
  case SQLCOM_SHOW_ERRORS:
  {
1512 1513
    res= mysqld_show_warnings(thd, (ulong)
			      (1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR));
unknown's avatar
unknown committed
1514 1515
    break;
  }
unknown's avatar
unknown committed
1516 1517
  case SQLCOM_SHOW_NEW_MASTER:
  {
unknown's avatar
unknown committed
1518
    if (check_global_access(thd, REPL_SLAVE_ACL))
unknown's avatar
unknown committed
1519
      goto error;
unknown's avatar
unknown committed
1520
#ifndef WORKING_NEW_MASTER
1521
    net_printf(thd, ER_NOT_SUPPORTED_YET, "SHOW NEW MASTER");
unknown's avatar
unknown committed
1522 1523
    res= 1;
#else
unknown's avatar
unknown committed
1524
    res = show_new_master(thd);
unknown's avatar
unknown committed
1525
#endif
unknown's avatar
unknown committed
1526 1527
    break;
  }
1528 1529
  case SQLCOM_SHOW_SLAVE_HOSTS:
  {
unknown's avatar
unknown committed
1530
    if (check_global_access(thd, REPL_SLAVE_ACL))
1531 1532 1533 1534
      goto error;
    res = show_slave_hosts(thd);
    break;
  }
unknown's avatar
unknown committed
1535 1536
  case SQLCOM_SHOW_BINLOG_EVENTS:
  {
unknown's avatar
unknown committed
1537
    if (check_global_access(thd, REPL_SLAVE_ACL))
unknown's avatar
unknown committed
1538 1539 1540 1541
      goto error;
    res = show_binlog_events(thd);
    break;
  }
unknown's avatar
unknown committed
1542
  case SQLCOM_BACKUP_TABLE:
1543 1544 1545
  {
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables) ||
unknown's avatar
unknown committed
1546
	check_global_access(thd, FILE_ACL))
1547 1548
      goto error; /* purecov: inspected */
    res = mysql_backup_table(thd, tables);
unknown's avatar
unknown committed
1549

1550 1551
    break;
  }
unknown's avatar
unknown committed
1552
  case SQLCOM_RESTORE_TABLE:
1553 1554
  {
    if (check_db_used(thd,tables) ||
unknown's avatar
unknown committed
1555 1556
	check_table_access(thd, INSERT_ACL, tables) ||
	check_global_access(thd, FILE_ACL))
1557 1558 1559 1560
      goto error; /* purecov: inspected */
    res = mysql_restore_table(thd, tables);
    break;
  }
unknown's avatar
unknown committed
1561
  case SQLCOM_CHANGE_MASTER:
1562
  {
unknown's avatar
unknown committed
1563
    if (check_global_access(thd, SUPER_ACL))
1564
      goto error;
1565 1566 1567
    LOCK_ACTIVE_MI;
    res = change_master(thd,active_mi);
    UNLOCK_ACTIVE_MI;
1568 1569
    break;
  }
unknown's avatar
unknown committed
1570
  case SQLCOM_SHOW_SLAVE_STAT:
1571
  {
unknown's avatar
unknown committed
1572
    if (check_global_access(thd, SUPER_ACL))
1573
      goto error;
1574 1575 1576
    LOCK_ACTIVE_MI;
    res = show_master_info(thd,active_mi);
    UNLOCK_ACTIVE_MI;
1577 1578
    break;
  }
unknown's avatar
unknown committed
1579
  case SQLCOM_SHOW_MASTER_STAT:
1580
  {
unknown's avatar
unknown committed
1581
    if (check_global_access(thd, SUPER_ACL))
1582 1583 1584 1585
      goto error;
    res = show_binlog_info(thd);
    break;
  }
1586 1587
    
  case SQLCOM_LOAD_MASTER_DATA: // sync with master
unknown's avatar
unknown committed
1588
    if (check_global_access(thd, SUPER_ACL))
1589
      goto error;
1590 1591 1592 1593
    if (end_active_trans(thd))
      res= -1;
    else
      res = load_master_data(thd);
1594 1595
    break;
    
unknown's avatar
unknown committed
1596 1597 1598
#ifdef HAVE_INNOBASE_DB
  case SQLCOM_SHOW_INNODB_STATUS:
    {
1599
      if (check_global_access(thd, SUPER_ACL))
unknown's avatar
unknown committed
1600 1601 1602 1603 1604
	goto error;
      res = innodb_show_status(thd);
      break;
    }
#endif
unknown's avatar
unknown committed
1605

unknown's avatar
unknown committed
1606
  case SQLCOM_LOAD_MASTER_TABLE:
1607
  {
unknown's avatar
unknown committed
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
    if (!tables->db)
      tables->db=thd->db;
    if (check_access(thd,CREATE_ACL,tables->db,&tables->grant.privilege))
      goto error;				/* purecov: inspected */
    if (grant_option)
    {
      /* Check that the first table has CREATE privilege */
      TABLE_LIST *tmp_table_list=tables->next;
      tables->next=0;
      bool error=check_grant(thd,CREATE_ACL,tables);
      tables->next=tmp_table_list;
      if (error)
1620
	goto error;
unknown's avatar
unknown committed
1621
    }
1622
    if (strlen(tables->real_name) > NAME_LEN)
unknown's avatar
unknown committed
1623
    {
unknown's avatar
unknown committed
1624
      net_printf(thd,ER_WRONG_TABLE_NAME,tables->real_name);
unknown's avatar
unknown committed
1625 1626
      break;
    }
1627 1628 1629 1630 1631
    LOCK_ACTIVE_MI;
    // fetch_master_table will send the error to the client on failure
    if (!fetch_master_table(thd, tables->db, tables->real_name,
			    active_mi, 0))
    {
1632
      send_ok(thd);
1633 1634
    }
    UNLOCK_ACTIVE_MI;
unknown's avatar
unknown committed
1635
    break;
1636
  }
unknown's avatar
unknown committed
1637
  case SQLCOM_CREATE_TABLE:
unknown's avatar
unknown committed
1638 1639 1640
  {
    ulong want_priv= ((lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) ?
		      CREATE_TMP_ACL : CREATE_ACL);
1641 1642
    if (!tables->db)
      tables->db=thd->db;
unknown's avatar
unknown committed
1643
    if (check_access(thd,want_priv,tables->db,&tables->grant.privilege) ||
1644 1645 1646
	check_merge_table_access(thd, tables->db,
				 (TABLE_LIST *)
				 lex->create_info.merge_list.first))
unknown's avatar
unknown committed
1647
      goto error;				/* purecov: inspected */
unknown's avatar
unknown committed
1648
    if (grant_option && want_priv != CREATE_TMP_ACL)
unknown's avatar
unknown committed
1649 1650 1651 1652
    {
      /* Check that the first table has CREATE privilege */
      TABLE_LIST *tmp_table_list=tables->next;
      tables->next=0;
unknown's avatar
unknown committed
1653
      bool error=check_grant(thd, want_priv, tables);
unknown's avatar
unknown committed
1654 1655 1656 1657
      tables->next=tmp_table_list;
      if (error)
	goto error;
    }
1658
    if (strlen(tables->real_name) > NAME_LEN)
unknown's avatar
unknown committed
1659
    {
unknown's avatar
unknown committed
1660
      net_printf(thd, ER_WRONG_TABLE_NAME, tables->alias);
unknown's avatar
unknown committed
1661 1662 1663
      res=0;
      break;
    }
1664 1665 1666
#ifndef HAVE_READLINK
    lex->create_info.data_file_name=lex->create_info.index_file_name=0;
#else
1667
    /* Fix names if symlinked tables */
unknown's avatar
unknown committed
1668
    if (append_file_to_dir(thd, &lex->create_info.data_file_name,
1669
			   tables->real_name) ||
unknown's avatar
unknown committed
1670
	append_file_to_dir(thd,&lex->create_info.index_file_name,
1671
			   tables->real_name))
1672 1673 1674 1675
    {
      res=-1;
      break;
    }
1676
#endif
1677
    if (select_lex->item_list.elements)		// With select
unknown's avatar
unknown committed
1678 1679 1680 1681
    {
      select_result *result;

      if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
unknown's avatar
unknown committed
1682
	  check_dup(tables->db, tables->real_name, tables->next))
unknown's avatar
unknown committed
1683
      {
1684
	net_printf(thd,ER_INSERT_TABLE_USED,tables->real_name);
unknown's avatar
unknown committed
1685 1686 1687 1688
	DBUG_VOID_RETURN;
      }
      if (tables->next)
      {
1689
	TABLE_LIST *table;
unknown's avatar
unknown committed
1690 1691
	if (check_table_access(thd, SELECT_ACL, tables->next))
	  goto error;				// Error message is given
1692 1693
	for (table = tables->next ; table ; table=table->next)
	  table->lock_type= lex->lock_option;
unknown's avatar
unknown committed
1694
      }
1695 1696 1697 1698 1699
      unit->offset_limit_cnt= select_lex->offset_limit;
      unit->select_limit_cnt= select_lex->select_limit+
	select_lex->offset_limit;
      if (unit->select_limit_cnt < select_lex->select_limit)
	unit->select_limit_cnt= HA_POS_ERROR;		// No limit
1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715

      /* Skip first table, which is the table we are creating */
      lex->select_lex.table_list.first=
	(byte*) (((TABLE_LIST *) lex->select_lex.table_list.first)->next);
      if (!(res=open_and_lock_tables(thd,tables->next)))
      {
        if ((result=new select_create(tables->db ? tables->db : thd->db,
                                      tables->real_name, &lex->create_info,
                                      lex->create_list,
                                      lex->key_list,
                                      select_lex->item_list,lex->duplicates)))
          res=handle_select(thd, lex, result);
	else
	  res= -1;
      }
    }
unknown's avatar
unknown committed
1716 1717 1718 1719 1720
    else // regular create
    {
      res = mysql_create_table(thd,tables->db ? tables->db : thd->db,
			       tables->real_name, &lex->create_info,
			       lex->create_list,
1721
			       lex->key_list,0,0,0); // do logging
unknown's avatar
unknown committed
1722
      if (!res)
1723
	send_ok(thd);
unknown's avatar
unknown committed
1724 1725
    }
    break;
unknown's avatar
unknown committed
1726
  }
unknown's avatar
unknown committed
1727 1728 1729 1730 1731 1732 1733
  case SQLCOM_CREATE_INDEX:
    if (!tables->db)
      tables->db=thd->db;
    if (check_access(thd,INDEX_ACL,tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
    if (grant_option && check_grant(thd,INDEX_ACL,tables))
      goto error;
1734 1735 1736 1737
    if (end_active_trans(thd))
      res= -1;
    else
      res = mysql_create_index(thd, tables, lex->key_list);
unknown's avatar
unknown committed
1738 1739 1740
    break;

  case SQLCOM_SLAVE_START:
1741 1742 1743 1744
  {
    LOCK_ACTIVE_MI;
    start_slave(thd,active_mi,1 /* net report*/);
    UNLOCK_ACTIVE_MI;
unknown's avatar
unknown committed
1745
    break;
1746
  }
unknown's avatar
unknown committed
1747
  case SQLCOM_SLAVE_STOP:
1748 1749 1750 1751
  {
    LOCK_ACTIVE_MI;
    stop_slave(thd,active_mi,1/* net report*/);
    UNLOCK_ACTIVE_MI;
unknown's avatar
unknown committed
1752
    break;
1753
  }
unknown's avatar
unknown committed
1754 1755
  case SQLCOM_ALTER_TABLE:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
1756
    send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
unknown's avatar
unknown committed
1757 1758 1759
    break;
#else
    {
unknown's avatar
unknown committed
1760
      ulong priv=0;
unknown's avatar
unknown committed
1761 1762
      if (lex->name && strlen(lex->name) > NAME_LEN)
      {
1763
	net_printf(thd,ER_WRONG_TABLE_NAME,lex->name);
unknown's avatar
unknown committed
1764 1765 1766
	res=0;
	break;
      }
1767 1768
      if (!tables->db)
	tables->db=thd->db;
1769 1770
      if (!select_lex->db)
	select_lex->db=tables->db;
unknown's avatar
unknown committed
1771
      if (check_access(thd,ALTER_ACL,tables->db,&tables->grant.privilege) ||
1772
	  check_access(thd,INSERT_ACL | CREATE_ACL,select_lex->db,&priv) ||
1773 1774 1775 1776
	  check_merge_table_access(thd, tables->db, 
				   (TABLE_LIST *)
				   lex->create_info.merge_list.first))
	goto error;				/* purecov: inspected */
unknown's avatar
unknown committed
1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787
      if (!tables->db)
	tables->db=thd->db;
      if (grant_option)
      {
	if (check_grant(thd,ALTER_ACL,tables))
	  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));
	  tmp_table.real_name=lex->name;
1788
	  tmp_table.db=select_lex->db;
unknown's avatar
unknown committed
1789 1790 1791 1792 1793
	  tmp_table.grant.privilege=priv;
	  if (check_grant(thd,INSERT_ACL | CREATE_ACL,tables))
	    goto error;
	}
      }
1794 1795
      /* Don't yet allow changing of symlinks with ALTER TABLE */
      lex->create_info.data_file_name=lex->create_info.index_file_name=0;
unknown's avatar
unknown committed
1796
      /* ALTER TABLE ends previous transaction */
1797
      if (end_active_trans(thd))
unknown's avatar
unknown committed
1798 1799
	res= -1;
      else
unknown's avatar
unknown committed
1800
      {
1801
	res= mysql_alter_table(thd, select_lex->db, lex->name,
unknown's avatar
unknown committed
1802 1803 1804
			       &lex->create_info,
			       tables, lex->create_list,
			       lex->key_list, lex->drop_list, lex->alter_list,
1805
                               (ORDER *) select_lex->order_list.first,
1806 1807
			       lex->drop_primary, lex->duplicates,
			       lex->alter_keys_onoff, lex->simple_alter);
unknown's avatar
unknown committed
1808
      }
unknown's avatar
unknown committed
1809 1810 1811
      break;
    }
#endif
unknown's avatar
unknown committed
1812
  case SQLCOM_RENAME_TABLE:
unknown's avatar
unknown committed
1813 1814 1815
  {
    TABLE_LIST *table;
    if (check_db_used(thd,tables))
unknown's avatar
unknown committed
1816
      goto error;
unknown's avatar
unknown committed
1817 1818
    for (table=tables ; table ; table=table->next->next)
    {
unknown's avatar
unknown committed
1819 1820
      if (check_access(thd, ALTER_ACL | DROP_ACL, table->db,
		       &table->grant.privilege) ||
unknown's avatar
unknown committed
1821 1822 1823 1824 1825
	  check_access(thd, INSERT_ACL | CREATE_ACL, table->next->db,
		       &table->next->grant.privilege))
	goto error;
      if (grant_option)
      {
unknown's avatar
unknown committed
1826 1827 1828 1829 1830
	TABLE_LIST old_list,new_list;
	old_list=table[0];
	new_list=table->next[0];
	old_list.next=new_list.next=0;
	if (check_grant(thd,ALTER_ACL,&old_list) ||
unknown's avatar
unknown committed
1831
	    (!test_all_bits(table->next->grant.privilege,
1832
			    INSERT_ACL | CREATE_ACL) &&
unknown's avatar
unknown committed
1833
	     check_grant(thd,INSERT_ACL | CREATE_ACL, &new_list)))
unknown's avatar
unknown committed
1834 1835 1836
	  goto error;
      }
    }
unknown's avatar
unknown committed
1837
    query_cache_invalidate3(thd, tables, 0);
1838 1839 1840
    if (end_active_trans(thd))
      res= -1;
    else if (mysql_rename_tables(thd,tables))
unknown's avatar
unknown committed
1841 1842
      res= -1;
    break;
unknown's avatar
unknown committed
1843
  }
unknown's avatar
unknown committed
1844 1845
  case SQLCOM_SHOW_BINLOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
1846
    send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
unknown's avatar
unknown committed
1847 1848 1849
    DBUG_VOID_RETURN;
#else
    {
unknown's avatar
unknown committed
1850
      if (check_global_access(thd, SUPER_ACL))
unknown's avatar
unknown committed
1851 1852 1853 1854 1855
	goto error;
      res = show_binlogs(thd);
      break;
    }
#endif    
unknown's avatar
unknown committed
1856
  case SQLCOM_SHOW_CREATE:
unknown's avatar
unknown committed
1857
#ifdef DONT_ALLOW_SHOW_COMMANDS
1858
    send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
unknown's avatar
unknown committed
1859 1860
    DBUG_VOID_RETURN;
#else
unknown's avatar
unknown committed
1861
    {
unknown's avatar
unknown committed
1862 1863 1864 1865
      if (check_db_used(thd, tables) ||
	  check_access(thd, SELECT_ACL | EXTRA_ACL, tables->db,
		       &tables->grant.privilege))
	goto error;
unknown's avatar
unknown committed
1866
      res = mysqld_show_create(thd, tables);
unknown's avatar
unknown committed
1867 1868
      break;
    }
unknown's avatar
unknown committed
1869
#endif
unknown's avatar
unknown committed
1870
  case SQLCOM_REPAIR:
1871 1872 1873 1874 1875 1876 1877
  {
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
      goto error; /* purecov: inspected */
    res = mysql_repair_table(thd, tables, &lex->check_opt);
    break;
  }
unknown's avatar
unknown committed
1878
  case SQLCOM_CHECK:
1879 1880 1881 1882 1883 1884 1885
  {
    if (check_db_used(thd,tables) ||
	check_table_access(thd, SELECT_ACL | EXTRA_ACL , tables))
      goto error; /* purecov: inspected */
    res = mysql_check_table(thd, tables, &lex->check_opt);
    break;
  }
unknown's avatar
unknown committed
1886 1887
  case SQLCOM_ANALYZE:
  {
unknown's avatar
unknown committed
1888 1889
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
unknown's avatar
unknown committed
1890
      goto error; /* purecov: inspected */
1891
    res = mysql_analyze_table(thd, tables, &lex->check_opt);
unknown's avatar
unknown committed
1892
    break;
unknown's avatar
unknown committed
1893
  }
1894

unknown's avatar
unknown committed
1895 1896 1897
  case SQLCOM_OPTIMIZE:
  {
    HA_CREATE_INFO create_info;
1898 1899
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
unknown's avatar
unknown committed
1900
      goto error; /* purecov: inspected */
1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
    if (specialflag & (SPECIAL_SAFE_MODE | SPECIAL_NO_NEW_FUNC))
    {
      /* Use ALTER TABLE */
      lex->create_list.empty();
      lex->key_list.empty();
      lex->col_list.empty();
      lex->drop_list.empty();
      lex->alter_list.empty();
      bzero((char*) &create_info,sizeof(create_info));
      create_info.db_type=DB_TYPE_DEFAULT;
      create_info.row_type=ROW_TYPE_DEFAULT;
unknown's avatar
unknown committed
1912
      create_info.table_charset=default_charset_info;
1913 1914 1915
      res= mysql_alter_table(thd, NullS, NullS, &create_info,
			     tables, lex->create_list,
			     lex->key_list, lex->drop_list, lex->alter_list,
unknown's avatar
unknown committed
1916
                             (ORDER *) 0,
1917 1918 1919 1920
			     0,DUP_ERROR);
    }
    else
      res = mysql_optimize_table(thd, tables, &lex->check_opt);
unknown's avatar
unknown committed
1921 1922 1923 1924 1925 1926 1927
    break;
  }
  case SQLCOM_UPDATE:
    if (check_access(thd,UPDATE_ACL,tables->db,&tables->grant.privilege))
      goto error;
    if (grant_option && check_grant(thd,UPDATE_ACL,tables))
      goto error;
1928
    if (select_lex->item_list.elements != lex->value_list.elements)
unknown's avatar
unknown committed
1929
    {
1930
      send_error(thd,ER_WRONG_VALUE_COUNT);
unknown's avatar
unknown committed
1931 1932
      DBUG_VOID_RETURN;
    }
1933 1934 1935 1936 1937 1938 1939 1940 1941 1942
    if (select_lex->table_list.elements == 1)
    {
      res = mysql_update(thd,tables,
			 select_lex->item_list,
			 lex->value_list,
			 select_lex->where,
			 (ORDER *) select_lex->order_list.first,
			 select_lex->select_limit,
			 lex->duplicates,
			 lex->lock_option);
unknown's avatar
unknown committed
1943 1944

#ifdef DELETE_ITEMS
1945
      delete select_lex->where;
unknown's avatar
unknown committed
1946
#endif
1947 1948 1949 1950 1951 1952
    }
    else 
    {
      multi_update  *result;
      uint table_count;
      TABLE_LIST *auxi;
unknown's avatar
unknown committed
1953 1954
      const char *msg=0;

1955 1956 1957 1958 1959 1960
      lex->sql_command=SQLCOM_MULTI_UPDATE;
      for (auxi=(TABLE_LIST*) tables, table_count=0 ; auxi ; auxi=auxi->next)
      {
	table_count++;
	auxi->lock_type=TL_WRITE;
      }
unknown's avatar
unknown committed
1961

unknown's avatar
unknown committed
1962 1963 1964 1965 1966 1967
      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)
1968
      {
1969
	net_printf(thd, ER_WRONG_USAGE, "UPDATE", msg);
unknown's avatar
unknown committed
1970 1971
	res= 1;
	break;
1972
      }
unknown's avatar
unknown committed
1973

1974 1975 1976
      tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
      if ((res=open_and_lock_tables(thd,tables)))
	break;
unknown's avatar
unknown committed
1977
      unit->select_limit_cnt= HA_POS_ERROR;
1978
      if (!setup_fields(thd,tables,select_lex->item_list,1,0,0) && 
unknown's avatar
unknown committed
1979 1980
	  !setup_fields(thd,tables,lex->value_list,0,0,0) && 
	  !thd->fatal_error &&
unknown's avatar
unknown committed
1981 1982 1983
	  (result=new multi_update(thd,tables,select_lex->item_list,
				   lex->duplicates, lex->lock_option,
				   table_count)))
1984 1985 1986 1987 1988 1989 1990 1991 1992 1993
      {
	List <Item> total_list;
	List_iterator <Item> field_list(select_lex->item_list);
	List_iterator <Item> value_list(lex->value_list);
	Item *item;
	while ((item=field_list++))
	  total_list.push_back(item);
	while ((item=value_list++))
	  total_list.push_back(item);
	
1994 1995 1996 1997 1998 1999
	res= mysql_select(thd, tables, total_list,
			  select_lex->where,
			  (ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
			  (ORDER *)NULL,
			  select_lex->options | thd->options |
			  SELECT_NO_JOIN_CACHE,
unknown's avatar
unknown committed
2000
			  result, unit, select_lex, 0);
2001 2002 2003 2004 2005 2006 2007
	delete result;
      }
      else
	res= -1;					// Error is not sent
      close_thread_tables(thd);
    }
    break; 
unknown's avatar
unknown committed
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
  case SQLCOM_INSERT:
    if (check_access(thd,INSERT_ACL,tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
    if (grant_option && check_grant(thd,INSERT_ACL,tables))
      goto error;
    res = mysql_insert(thd,tables,lex->field_list,lex->many_values,
		       lex->duplicates,
		       lex->lock_option);
    break;
  case SQLCOM_REPLACE:
2018
    if (check_access(thd,INSERT_ACL | DELETE_ACL,
unknown's avatar
unknown committed
2019 2020
		     tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
2021
    if (grant_option && check_grant(thd,INSERT_ACL | DELETE_ACL,
unknown's avatar
unknown committed
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031
				    tables))

      goto error;
    res = mysql_insert(thd,tables,lex->field_list,lex->many_values,
		       DUP_REPLACE,
		       lex->lock_option);
    break;
  case SQLCOM_REPLACE_SELECT:
  case SQLCOM_INSERT_SELECT:
  {
2032

unknown's avatar
unknown committed
2033 2034 2035 2036
    /*
      Check that we have modify privileges for the first table and
      select privileges for the rest
    */
2037
    {
unknown's avatar
unknown committed
2038
      ulong privilege= (lex->sql_command == SQLCOM_INSERT_SELECT ?
2039
			INSERT_ACL : INSERT_ACL | DELETE_ACL);
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
      TABLE_LIST *save_next=tables->next;
      tables->next=0;
      if (check_access(thd, privilege,
		       tables->db,&tables->grant.privilege) ||
	  (grant_option && check_grant(thd, privilege, tables)))
	goto error;
      tables->next=save_next;
      if ((res=check_table_access(thd, SELECT_ACL, save_next)))
	goto error;
    }
unknown's avatar
unknown committed
2050 2051

    select_result *result;
2052 2053 2054 2055
    unit->offset_limit_cnt= select_lex->offset_limit;
    unit->select_limit_cnt= select_lex->select_limit+select_lex->offset_limit;
    if (unit->select_limit_cnt < select_lex->select_limit)
      unit->select_limit_cnt= HA_POS_ERROR;		// No limit
unknown's avatar
unknown committed
2056

unknown's avatar
unknown committed
2057
    if (check_dup(tables->db, tables->real_name, tables->next))
2058
    {
2059
      net_printf(thd,ER_INSERT_TABLE_USED,tables->real_name);
2060
      DBUG_VOID_RETURN;
unknown's avatar
unknown committed
2061
    }
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
    tables->lock_type=TL_WRITE;		// update first table
    {
      TABLE_LIST *table;
      for (table = tables->next ; table ; table=table->next)
	table->lock_type= lex->lock_option;
    }

    /* Skip first table, which is the table we are inserting in */
    lex->select_lex.table_list.first=
      (byte*) (((TABLE_LIST *) lex->select_lex.table_list.first)->next);
    if (!(res=open_and_lock_tables(thd, tables)))
    {
      if ((result=new select_insert(tables->table,&lex->field_list,
2075
				    lex->duplicates)))
2076 2077 2078 2079
	res=handle_select(thd,lex,result);
    }
    else
      res= -1;
unknown's avatar
unknown committed
2080 2081
    break;
  }
2082
  case SQLCOM_TRUNCATE:
2083 2084 2085 2086 2087 2088 2089 2090
    if (check_access(thd,DELETE_ACL,tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
    /*
      Don't allow this within a transaction because we want to use
      re-generate table
    */
    if (thd->locked_tables || thd->active_transaction())
    {
2091
      send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION,NullS);
2092 2093 2094 2095
      goto error;
    }
    res=mysql_truncate(thd,tables);
    break;
unknown's avatar
unknown committed
2096
  case SQLCOM_DELETE:
unknown's avatar
unknown committed
2097 2098 2099 2100 2101 2102 2103
  {
    if (check_access(thd,DELETE_ACL,tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
    if (grant_option && check_grant(thd,DELETE_ACL,tables))
      goto error;
    // Set privilege for the WHERE clause
    tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
unknown's avatar
unknown committed
2104 2105 2106 2107
    res = mysql_delete(thd,tables, select_lex->where,
                       (ORDER*) select_lex->order_list.first,
                       select_lex->select_limit, lex->lock_option,
                       select_lex->options);
unknown's avatar
unknown committed
2108 2109
    break;
  }
2110
  case SQLCOM_DELETE_MULTI:
unknown's avatar
unknown committed
2111 2112 2113 2114 2115
  {
    TABLE_LIST *aux_tables=(TABLE_LIST *)thd->lex.auxilliary_table_list.first;
    TABLE_LIST *auxi;
    uint table_count=0;
    multi_delete *result;
unknown's avatar
unknown committed
2116

unknown's avatar
unknown committed
2117 2118 2119 2120 2121 2122 2123
    /* sql_yacc guarantees that tables and aux_tables are not zero */
    if (check_db_used(thd, tables) || check_db_used(thd,aux_tables) ||
	check_table_access(thd,SELECT_ACL, tables) || 
	check_table_access(thd,DELETE_ACL, aux_tables))
      goto error;
    if ((thd->options & OPTION_SAFE_UPDATES) && !select_lex->where)
    {		
2124
      send_error(thd,ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE);
unknown's avatar
unknown committed
2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139
      goto error;
    }
    for (auxi=(TABLE_LIST*) aux_tables ; auxi ; auxi=auxi->next)
    {
      table_count++;
      /* All tables in aux_tables must be found in FROM PART */
      TABLE_LIST *walk;
      for (walk=(TABLE_LIST*) tables ; walk ; walk=walk->next)
      {
	if (!strcmp(auxi->real_name,walk->real_name) &&
	    !strcmp(walk->db,auxi->db))
	  break;
      }
      if (!walk)
      {
2140
	net_printf(thd,ER_NONUNIQ_TABLE,auxi->real_name);
unknown's avatar
unknown committed
2141 2142 2143
	goto error;
      }
      auxi->lock_type=walk->lock_type=TL_WRITE;
2144
      auxi->table_list=  walk;		// Remember corresponding table
2145 2146 2147
    }
    if (add_item_to_list(new Item_null()))
    {
unknown's avatar
unknown committed
2148
      res= -1;
2149
      break;
unknown's avatar
unknown committed
2150 2151 2152 2153 2154 2155
    }
    thd->proc_info="init";
    if ((res=open_and_lock_tables(thd,tables)))
      break;
    /* Fix tables-to-be-deleted-from list to point at opened tables */
    for (auxi=(TABLE_LIST*) aux_tables ; auxi ; auxi=auxi->next)
2156
      auxi->table= auxi->table_list->table;
2157 2158 2159
    if (!thd->fatal_error && (result= new multi_delete(thd,aux_tables,
						       lex->lock_option,
						       table_count)))
unknown's avatar
unknown committed
2160
    {
unknown's avatar
unknown committed
2161 2162 2163 2164 2165 2166
      res= mysql_select(thd,tables,select_lex->item_list,
			select_lex->where,
			(ORDER *)NULL,(ORDER *)NULL,(Item *)NULL,
			(ORDER *)NULL,
			select_lex->options | thd->options |
			SELECT_NO_JOIN_CACHE,
unknown's avatar
unknown committed
2167
			result, unit, select_lex, 0);
2168
      delete result;
unknown's avatar
unknown committed
2169 2170 2171 2172 2173 2174
    }
    else
      res= -1;					// Error is not sent
    close_thread_tables(thd);
    break;
  }
unknown's avatar
unknown committed
2175
  case SQLCOM_DROP_TABLE:
unknown's avatar
unknown committed
2176 2177 2178 2179 2180 2181 2182 2183 2184
  {
    if (check_table_access(thd,DROP_ACL,tables))
      goto error;				/* purecov: inspected */
    if (end_active_trans(thd))
      res= -1;
    else
      res = mysql_rm_table(thd,tables,lex->drop_if_exists);
  }
  break;
unknown's avatar
unknown committed
2185 2186 2187 2188 2189 2190 2191
  case SQLCOM_DROP_INDEX:
    if (!tables->db)
      tables->db=thd->db;
    if (check_access(thd,INDEX_ACL,tables->db,&tables->grant.privilege))
      goto error;				/* purecov: inspected */
    if (grant_option && check_grant(thd,INDEX_ACL,tables))
      goto error;
2192 2193 2194 2195
    if (end_active_trans(thd))
      res= -1;
    else
      res = mysql_drop_index(thd, tables, lex->drop_list);
unknown's avatar
unknown committed
2196 2197
    break;
  case SQLCOM_SHOW_DATABASES:
2198
#if defined(DONT_ALLOW_SHOW_COMMANDS)
2199
    send_error(thd,ER_NOT_ALLOWED_COMMAND);   /* purecov: inspected */
unknown's avatar
unknown committed
2200 2201 2202
    DBUG_VOID_RETURN;
#else
    if ((specialflag & SPECIAL_SKIP_SHOW_DB) &&
unknown's avatar
unknown committed
2203
	check_global_access(thd, SHOW_DB_ACL))
unknown's avatar
unknown committed
2204 2205 2206 2207 2208
      goto error;
    res= mysqld_show_dbs(thd, (lex->wild ? lex->wild->ptr() : NullS));
    break;
#endif
  case SQLCOM_SHOW_PROCESSLIST:
unknown's avatar
unknown committed
2209
    if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
unknown's avatar
unknown committed
2210 2211 2212 2213
      break;
    mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
			  thd->priv_user,lex->verbose);
    break;
unknown's avatar
unknown committed
2214 2215 2216 2217 2218 2219 2220 2221 2222
  case SQLCOM_SHOW_TABLE_TYPES:
    res= mysqld_show_table_types(thd);
    break;
  case SQLCOM_SHOW_PRIVILEGES:
    res= mysqld_show_privileges(thd);
    break;
  case SQLCOM_SHOW_COLUMN_TYPES:
    res= mysqld_show_column_types(thd);
    break;
unknown's avatar
unknown committed
2223
  case SQLCOM_SHOW_STATUS:
2224
    res= mysqld_show(thd,(lex->wild ? lex->wild->ptr() : NullS),status_vars,
unknown's avatar
unknown committed
2225
		     OPT_GLOBAL);
unknown's avatar
unknown committed
2226 2227 2228
    break;
  case SQLCOM_SHOW_VARIABLES:
    res= mysqld_show(thd, (lex->wild ? lex->wild->ptr() : NullS),
unknown's avatar
unknown committed
2229
		     init_vars, lex->option_type);
unknown's avatar
unknown committed
2230
    break;
unknown's avatar
unknown committed
2231 2232
  case SQLCOM_SHOW_LOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
2233
    send_error(thd,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
unknown's avatar
unknown committed
2234 2235 2236 2237 2238 2239 2240 2241 2242
    DBUG_VOID_RETURN;
#else
    {
      if (grant_option && check_access(thd, FILE_ACL, any_db))
	goto error;
      res= mysqld_show_logs(thd);
      break;
    }
#endif
unknown's avatar
unknown committed
2243
  case SQLCOM_SHOW_TABLES:
2244
    /* FALL THROUGH */
unknown's avatar
unknown committed
2245
#ifdef DONT_ALLOW_SHOW_COMMANDS
2246
    send_error(thd,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
unknown's avatar
unknown committed
2247 2248 2249
    DBUG_VOID_RETURN;
#else
    {
2250
      char *db=select_lex->db ? select_lex->db : thd->db;
unknown's avatar
unknown committed
2251 2252
      if (!db)
      {
2253
	send_error(thd,ER_NO_DB_ERROR);	/* purecov: inspected */
unknown's avatar
unknown committed
2254 2255 2256
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);				// Fix escaped '_'
2257
      if (check_db_name(db))
unknown's avatar
unknown committed
2258
      {
2259
        net_printf(thd,ER_WRONG_DB_NAME, db);
2260
        goto error;
unknown's avatar
unknown committed
2261 2262 2263 2264
      }
      if (check_access(thd,SELECT_ACL,db,&thd->col_access))
	goto error;				/* purecov: inspected */
      /* grant is checked in mysqld_show_tables */
2265
      if (select_lex->options & SELECT_DESCRIBE)
2266
        res= mysqld_extend_show_tables(thd,db,
2267
				       (lex->wild ? lex->wild->ptr() : NullS));
unknown's avatar
unknown committed
2268 2269 2270 2271 2272 2273
      else
	res= mysqld_show_tables(thd,db,
				(lex->wild ? lex->wild->ptr() : NullS));
      break;
    }
#endif
2274 2275 2276
  case SQLCOM_SHOW_OPEN_TABLES:
    res= mysqld_show_open_tables(thd,(lex->wild ? lex->wild->ptr() : NullS));
    break;
2277 2278
  case SQLCOM_SHOW_CHARSETS:
    res= mysqld_show_charsets(thd,(lex->wild ? lex->wild->ptr() : NullS));
2279
    break;
unknown's avatar
unknown committed
2280 2281
  case SQLCOM_SHOW_FIELDS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
2282
    send_error(thd,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
unknown's avatar
unknown committed
2283 2284 2285
    DBUG_VOID_RETURN;
#else
    {
2286 2287
      char *db=tables->db;
      if (!*db)
unknown's avatar
unknown committed
2288
      {
2289
	send_error(thd,ER_NO_DB_ERROR);	/* purecov: inspected */
unknown's avatar
unknown committed
2290 2291 2292
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);			// Fix escaped '_'
2293
      remove_escape(tables->real_name);
unknown's avatar
unknown committed
2294 2295 2296 2297 2298 2299
      if (check_access(thd,SELECT_ACL | EXTRA_ACL,db,&thd->col_access))
	goto error;				/* purecov: inspected */
      tables->grant.privilege=thd->col_access;
      if (grant_option && check_grant(thd,SELECT_ACL,tables,2))
	goto error;
      res= mysqld_show_fields(thd,tables,
unknown's avatar
unknown committed
2300 2301
			      (lex->wild ? lex->wild->ptr() : NullS),
			      lex->verbose);
unknown's avatar
unknown committed
2302 2303 2304 2305 2306
      break;
    }
#endif
  case SQLCOM_SHOW_KEYS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
2307
    send_error(thd,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
unknown's avatar
unknown committed
2308 2309 2310
    DBUG_VOID_RETURN;
#else
    {
2311
      char *db=tables->db;
unknown's avatar
unknown committed
2312 2313
      if (!db)
      {
2314
	send_error(thd,ER_NO_DB_ERROR);	/* purecov: inspected */
unknown's avatar
unknown committed
2315 2316 2317
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);			// Fix escaped '_'
2318
      remove_escape(tables->real_name);
unknown's avatar
unknown committed
2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330
      if (!tables->db)
	tables->db=thd->db;
      if (check_access(thd,SELECT_ACL,db,&thd->col_access))
	goto error; /* purecov: inspected */
      tables->grant.privilege=thd->col_access;
      if (grant_option && check_grant(thd,SELECT_ACL,tables,2))
	goto error;
      res= mysqld_show_keys(thd,tables);
      break;
    }
#endif
  case SQLCOM_CHANGE_DB:
2331
    mysql_change_db(thd,select_lex->db);
unknown's avatar
unknown committed
2332 2333 2334 2335 2336
    break;
  case SQLCOM_LOAD:
  {
    uint privilege= (lex->duplicates == DUP_REPLACE ?
		     INSERT_ACL | UPDATE_ACL | DELETE_ACL : INSERT_ACL);
2337 2338

    if (!lex->local_file)
unknown's avatar
unknown committed
2339 2340 2341 2342 2343 2344
    {
      if (check_access(thd,privilege | FILE_ACL,tables->db))
	goto error;
    }
    else
    {
2345
      if (!(thd->client_capabilities & CLIENT_LOCAL_FILES) ||
unknown's avatar
unknown committed
2346
	  ! opt_local_infile)
2347
      {
2348
	send_error(thd,ER_NOT_ALLOWED_COMMAND);
2349 2350
	goto error;
      }
unknown's avatar
unknown committed
2351
      if (check_access(thd,privilege,tables->db,&tables->grant.privilege) ||
2352
	  grant_option && check_grant(thd,privilege,tables))
unknown's avatar
unknown committed
2353 2354 2355 2356 2357 2358 2359
	goto error;
    }
    res=mysql_load(thd, lex->exchange, tables, lex->field_list,
		   lex->duplicates, (bool) lex->local_file, lex->lock_option);
    break;
  }
  case SQLCOM_SET_OPTION:
2360
    if (!(res=sql_set_variables(thd, &lex->var_list)))
2361
      send_ok(thd);
unknown's avatar
unknown committed
2362 2363 2364 2365 2366 2367
    break;
  case SQLCOM_UNLOCK_TABLES:
    if (thd->locked_tables)
    {
      thd->lock=thd->locked_tables;
      thd->locked_tables=0;			// Will be automaticly closed
unknown's avatar
unknown committed
2368 2369 2370
    }
    if (thd->options & OPTION_TABLE_LOCK)
    {
unknown's avatar
unknown committed
2371
      end_active_trans(thd);
unknown's avatar
unknown committed
2372
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
unknown's avatar
unknown committed
2373 2374
    }
    if (thd->global_read_lock)
2375
      unlock_global_read_lock(thd);
2376
    send_ok(thd);
unknown's avatar
unknown committed
2377 2378 2379 2380 2381 2382 2383 2384
    break;
  case SQLCOM_LOCK_TABLES:
    if (thd->locked_tables)
    {
      thd->lock=thd->locked_tables;
      thd->locked_tables=0;			// Will be automaticly closed
      close_thread_tables(thd);
    }
2385
    if (check_db_used(thd,tables) || end_active_trans(thd))
unknown's avatar
unknown committed
2386
      goto error;
unknown's avatar
unknown committed
2387
    if (check_table_access(thd, LOCK_TABLES_ACL | SELECT_ACL, tables))
2388
      goto error;
unknown's avatar
unknown committed
2389
    thd->in_lock_tables=1;
unknown's avatar
unknown committed
2390
    thd->options|= OPTION_TABLE_LOCK;
unknown's avatar
unknown committed
2391 2392 2393 2394
    if (!(res=open_and_lock_tables(thd,tables)))
    {
      thd->locked_tables=thd->lock;
      thd->lock=0;
2395
      send_ok(thd);
unknown's avatar
unknown committed
2396
    }
unknown's avatar
unknown committed
2397 2398
    else
      thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
unknown's avatar
unknown committed
2399 2400 2401
    thd->in_lock_tables=0;
    break;
  case SQLCOM_CREATE_DB:
2402
  {
unknown's avatar
unknown committed
2403
    if (!strip_sp(lex->name) || check_db_name(lex->name))
unknown's avatar
unknown committed
2404
    {
2405
      net_printf(thd,ER_WRONG_DB_NAME, lex->name);
unknown's avatar
unknown committed
2406 2407
      break;
    }
2408
    if (lower_case_table_names)
2409
      my_casedn_str(system_charset_info, lex->name);
2410 2411
    if (check_access(thd,CREATE_ACL,lex->name,0,1))
      break;
2412
    res=mysql_create_db(thd,lex->name,&lex->create_info,0);
2413 2414
    break;
  }
unknown's avatar
unknown committed
2415
  case SQLCOM_DROP_DB:
2416
  {
unknown's avatar
unknown committed
2417
    if (!strip_sp(lex->name) || check_db_name(lex->name))
unknown's avatar
unknown committed
2418
    {
2419
      net_printf(thd,ER_WRONG_DB_NAME, lex->name);
unknown's avatar
unknown committed
2420 2421
      break;
    }
2422
    if (lower_case_table_names)
2423
      my_casedn_str(system_charset_info, lex->name);
2424
    if (check_access(thd,DROP_ACL,lex->name,0,1))
2425
      break;
2426 2427
    if (thd->locked_tables || thd->active_transaction())
    {
2428
      send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
2429 2430
      goto error;
    }
unknown's avatar
unknown committed
2431
    res=mysql_rm_db(thd,lex->name,lex->drop_if_exists,0);
2432 2433
    break;
  }
2434 2435 2436 2437
  case SQLCOM_ALTER_DB:
  {
    if (!strip_sp(lex->name) || check_db_name(lex->name))
    {
2438
      net_printf(thd,ER_WRONG_DB_NAME, lex->name);
2439 2440
      break;
    }
unknown's avatar
unknown committed
2441
    if (check_access(thd,ALTER_ACL,lex->name,0,1))
2442 2443 2444
      break;
    if (thd->locked_tables || thd->active_transaction())
    {
2445
      send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
2446 2447
      goto error;
    }
2448
    res=mysql_alter_db(thd,lex->name,&lex->create_info);
2449 2450
    break;
  }
unknown's avatar
unknown committed
2451 2452 2453 2454
  case SQLCOM_SHOW_CREATE_DB:
  {
    if (!strip_sp(lex->name) || check_db_name(lex->name))
    {
2455
      net_printf(thd,ER_WRONG_DB_NAME, lex->name);
unknown's avatar
unknown committed
2456 2457 2458 2459 2460 2461
      break;
    }
    if (check_access(thd,DROP_ACL,lex->name,0,1))
      break;
    if (thd->locked_tables || thd->active_transaction())
    {
2462
      send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
unknown's avatar
unknown committed
2463 2464 2465 2466 2467
      goto error;
    }
    res=mysqld_show_create_db(thd,lex->name);
    break;
  }
unknown's avatar
unknown committed
2468 2469 2470 2471 2472
  case SQLCOM_CREATE_FUNCTION:
    if (check_access(thd,INSERT_ACL,"mysql",0,1))
      break;
#ifdef HAVE_DLOPEN
    if (!(res = mysql_create_function(thd,&lex->udf)))
2473
      send_ok(thd);
unknown's avatar
unknown committed
2474 2475 2476 2477 2478 2479 2480 2481 2482
#else
    res= -1;
#endif
    break;
  case SQLCOM_DROP_FUNCTION:
    if (check_access(thd,DELETE_ACL,"mysql",0,1))
      break;
#ifdef HAVE_DLOPEN
    if (!(res = mysql_drop_function(thd,lex->udf.name)))
2483
      send_ok(thd);
unknown's avatar
unknown committed
2484 2485 2486 2487
#else
    res= -1;
#endif
    break;
2488 2489 2490 2491 2492 2493 2494 2495 2496
  case SQLCOM_REVOKE:
  case SQLCOM_GRANT:
  {
    if (check_access(thd, lex->grant | lex->grant_tot_col | GRANT_ACL,
		     tables && tables->db ? tables->db : select_lex->db,
		     tables ? &tables->grant.privilege : 0,
		     tables ? 0 : 1))
      goto error;

unknown's avatar
unknown committed
2497 2498 2499 2500
    /*
      Check that the user isn't trying to change a password for another
      user if he doesn't have UPDATE privilege to the MySQL database
    */
2501 2502 2503 2504 2505 2506 2507 2508 2509 2510

    if (thd->user)				// If not replication
    {
      LEX_USER *user;
      List_iterator <LEX_USER> user_list(lex->users_list);
      while ((user=user_list++))
      {
	if (user->password.str &&
	    (strcmp(thd->user,user->user.str) ||
	     user->host.str &&
2511 2512
	     my_strcasecmp(system_charset_info, 
                           user->host.str, thd->host_or_ip)))
2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526
	{
	  if (check_access(thd, UPDATE_ACL, "mysql",0,1))
	    goto error;
	  break;			// We are allowed to do changes
	}
      }
    }
    if (tables)
    {
      if (grant_option && check_grant(thd,
				      (lex->grant | lex->grant_tot_col |
				       GRANT_ACL),
				      tables))
	goto error;
unknown's avatar
unknown committed
2527 2528 2529
      if (!(res = mysql_table_grant(thd,tables,lex->users_list, lex->columns,
				    lex->grant,
				    lex->sql_command == SQLCOM_REVOKE)))
2530
      {
2531
	mysql_update_log.write(thd, thd->query, thd->query_length);
2532 2533
	if (mysql_bin_log.is_open())
	{
2534
	  Query_log_event qinfo(thd, thd->query, thd->query_length);
2535 2536 2537 2538 2539 2540 2541 2542
	  mysql_bin_log.write(&qinfo);
	}
      }
    }
    else
    {
      if (lex->columns.elements)
      {
2543
	send_error(thd,ER_ILLEGAL_GRANT_FOR_TABLE);
2544 2545 2546 2547 2548 2549 2550
	res=1;
      }
      else
	res = mysql_grant(thd, select_lex->db, lex->users_list, lex->grant,
			  lex->sql_command == SQLCOM_REVOKE);
      if (!res)
      {
2551
	mysql_update_log.write(thd, thd->query, thd->query_length);
2552 2553
	if (mysql_bin_log.is_open())
	{
2554
	  Query_log_event qinfo(thd, thd->query, thd->query_length);
2555 2556
	  mysql_bin_log.write(&qinfo);
	}
2557
	if (mqh_used && lex->sql_command == SQLCOM_GRANT)
2558
	{
unknown's avatar
unknown committed
2559 2560 2561
	  List_iterator <LEX_USER> str_list(lex->users_list);
	  LEX_USER *user;
	  while ((user=str_list++))
2562
	    reset_mqh(thd,user);
2563
	}
2564 2565 2566 2567
      }
    }
    break;
  }
unknown's avatar
unknown committed
2568
  case SQLCOM_FLUSH:
unknown's avatar
unknown committed
2569
  case SQLCOM_RESET:
unknown's avatar
unknown committed
2570
    if (check_global_access(thd,RELOAD_ACL) || check_db_used(thd, tables))
unknown's avatar
unknown committed
2571
      goto error;
unknown's avatar
unknown committed
2572
    if (reload_acl_and_cache(thd, lex->type, tables))
2573
      send_error(thd,0);
unknown's avatar
unknown committed
2574
    else
2575
      send_ok(thd);
unknown's avatar
unknown committed
2576 2577 2578 2579 2580 2581
    break;
  case SQLCOM_KILL:
    kill_one_thread(thd,lex->thread_id);
    break;
  case SQLCOM_SHOW_GRANTS:
    res=0;
2582 2583
    if ((thd->priv_user &&
	 !strcmp(thd->priv_user,lex->grant_user->user.str)) ||
2584
	!check_access(thd, SELECT_ACL, "mysql",0,1))
unknown's avatar
unknown committed
2585 2586 2587 2588
    {
      res = mysql_show_grants(thd,lex->grant_user);
    }
    break;
2589
  case SQLCOM_HA_OPEN:
2590 2591
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables))
2592 2593 2594 2595 2596 2597 2598 2599 2600
      goto error;
    res = mysql_ha_open(thd, tables);
    break;
  case SQLCOM_HA_CLOSE:
    if (check_db_used(thd,tables))
      goto error;
    res = mysql_ha_close(thd, tables);
    break;
  case SQLCOM_HA_READ:
2601 2602
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables))
2603
      goto error;
unknown's avatar
unknown committed
2604
    res = mysql_ha_read(thd, tables, lex->ha_read_mode, lex->backup_dir,
2605 2606
			lex->insert_list, lex->ha_rkey_mode, select_lex->where,
			select_lex->select_limit, select_lex->offset_limit);
2607 2608
    break;

unknown's avatar
unknown committed
2609
  case SQLCOM_BEGIN:
unknown's avatar
unknown committed
2610 2611 2612 2613 2614 2615
    if (thd->locked_tables)
    {
      thd->lock=thd->locked_tables;
      thd->locked_tables=0;			// Will be automaticly closed
      close_thread_tables(thd);			// Free tables
    }
unknown's avatar
unknown committed
2616 2617 2618 2619 2620 2621
    if (end_active_trans(thd))
    {
      res= -1;
    }
    else
    {
2622
      thd->options= ((thd->options & (ulong) ~(OPTION_STATUS_NO_TRANS_UPDATE)) |
unknown's avatar
unknown committed
2623 2624
		     OPTION_BEGIN);
      thd->server_status|= SERVER_STATUS_IN_TRANS;
2625
      send_ok(thd);
unknown's avatar
unknown committed
2626
    }
unknown's avatar
unknown committed
2627 2628
    break;
  case SQLCOM_COMMIT:
2629 2630 2631 2632 2633
    /*
      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...)
    */
unknown's avatar
unknown committed
2634
  {
2635
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
unknown's avatar
unknown committed
2636 2637
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
    if (!ha_commit(thd))
unknown's avatar
unknown committed
2638
    {
2639
      send_ok(thd);
unknown's avatar
unknown committed
2640
    }
unknown's avatar
unknown committed
2641 2642 2643
    else
      res= -1;
    break;
unknown's avatar
unknown committed
2644
  }
unknown's avatar
unknown committed
2645 2646 2647
  case SQLCOM_ROLLBACK:
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
    if (!ha_rollback(thd))
2648 2649
    {
      if (thd->options & OPTION_STATUS_NO_TRANS_UPDATE)
2650
	send_warning(thd,ER_WARNING_NOT_COMPLETE_ROLLBACK,0);
2651
      else
2652
	send_ok(thd);
2653
    }
unknown's avatar
unknown committed
2654 2655
    else
      res= -1;
2656
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
unknown's avatar
unknown committed
2657 2658
    break;
  default:					/* Impossible */
2659
    send_ok(thd);
unknown's avatar
unknown committed
2660 2661 2662 2663
    break;
  }
  thd->proc_info="query end";			// QQ
  if (res < 0)
2664
    send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
unknown's avatar
unknown committed
2665 2666 2667 2668 2669 2670 2671

error:
  DBUG_VOID_RETURN;
}


/****************************************************************************
unknown's avatar
unknown committed
2672 2673 2674 2675 2676 2677 2678
  Get the user (global) and database privileges for all used tables
  Returns true (error) if we can't get the privileges and we don't use
  table/column grants.
  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.
unknown's avatar
unknown committed
2679 2680 2681
****************************************************************************/

bool
unknown's avatar
unknown committed
2682
check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
2683
	     bool dont_check_global_grants, bool no_errors)
unknown's avatar
unknown committed
2684
{
unknown's avatar
unknown committed
2685 2686 2687 2688
  DBUG_ENTER("check_access");
  DBUG_PRINT("enter",("want_access: %lu  master_access: %lu", want_access,
		      thd->master_access));
  ulong db_access,dummy;
unknown's avatar
unknown committed
2689 2690 2691 2692 2693
  if (save_priv)
    *save_priv=0;
  else
    save_priv= &dummy;

2694
  if ((!db || !db[0]) && !thd->db && !dont_check_global_grants)
unknown's avatar
unknown committed
2695
  {
2696
    if (!no_errors)
2697
      send_error(thd,ER_NO_DB_ERROR);	/* purecov: tested */
unknown's avatar
unknown committed
2698
    DBUG_RETURN(TRUE);				/* purecov: tested */
unknown's avatar
unknown committed
2699 2700 2701 2702 2703
  }

  if ((thd->master_access & want_access) == want_access)
  {
    *save_priv=thd->master_access;
unknown's avatar
unknown committed
2704
    DBUG_RETURN(FALSE);
unknown's avatar
unknown committed
2705
  }
2706
  if (((want_access & ~thd->master_access) & ~(DB_ACLS | EXTRA_ACL)) ||
2707
      ! db && dont_check_global_grants)
unknown's avatar
unknown committed
2708
  {						// We can never grant this
2709
    if (!no_errors)
2710
      net_printf(thd,ER_ACCESS_DENIED_ERROR,
2711 2712 2713
		 thd->priv_user,
		 thd->host_or_ip,
		 thd->password ? ER(ER_YES) : ER(ER_NO));/* purecov: tested */
unknown's avatar
unknown committed
2714
    DBUG_RETURN(TRUE);				/* purecov: tested */
unknown's avatar
unknown committed
2715 2716 2717
  }

  if (db == any_db)
unknown's avatar
unknown committed
2718
    DBUG_RETURN(FALSE);				// Allow select on anything
unknown's avatar
unknown committed
2719

unknown's avatar
unknown committed
2720 2721 2722 2723 2724
  if (db && (!thd->db || strcmp(db,thd->db)))
    db_access=acl_get(thd->host, thd->ip, (char*) &thd->remote.sin_addr,
		      thd->priv_user, db); /* purecov: inspected */
  else
    db_access=thd->db_access;
2725 2726
  // Remove SHOW attribute and access rights we already have
  want_access &= ~(thd->master_access | EXTRA_ACL);
unknown's avatar
unknown committed
2727
  db_access= ((*save_priv=(db_access | thd->master_access)) & want_access);
2728 2729

  /* grant_option is set if there exists a single table or column grant */
unknown's avatar
unknown committed
2730
  if (db_access == want_access ||
2731 2732
      ((grant_option && !dont_check_global_grants) &&
       !(want_access & ~TABLE_ACLS)))
unknown's avatar
unknown committed
2733
    DBUG_RETURN(FALSE);				/* Ok */
2734
  if (!no_errors)
2735
    net_printf(thd,ER_DBACCESS_DENIED_ERROR,
2736 2737 2738
	       thd->priv_user,
	       thd->host_or_ip,
	       db ? db : thd->db ? thd->db : "unknown"); /* purecov: tested */
unknown's avatar
unknown committed
2739
  DBUG_RETURN(TRUE);				/* purecov: tested */
unknown's avatar
unknown committed
2740 2741 2742
}


unknown's avatar
unknown committed
2743 2744 2745
/* check for global access and give descriptive error message if it fails */

bool check_global_access(THD *thd, ulong want_access)
unknown's avatar
unknown committed
2746
{
unknown's avatar
unknown committed
2747 2748 2749 2750
  char command[128];
  if ((thd->master_access & want_access) == want_access)
    return 0;
  get_privilege_desc(command, sizeof(command), want_access);
2751
  net_printf(thd,ER_SPECIFIC_ACCESS_DENIED_ERROR,
unknown's avatar
unknown committed
2752 2753
	     command);
  return 1;
unknown's avatar
unknown committed
2754 2755 2756
}


unknown's avatar
unknown committed
2757
/*
unknown's avatar
unknown committed
2758 2759
  Check the privilege for all used tables.  Table privileges are cached
  in the table list for GRANT checking
unknown's avatar
unknown committed
2760 2761
*/

2762
bool
unknown's avatar
unknown committed
2763
check_table_access(THD *thd, ulong want_access,TABLE_LIST *tables,
2764
		   bool no_errors)
unknown's avatar
unknown committed
2765
{
unknown's avatar
unknown committed
2766 2767
  uint found=0;
  ulong found_access=0;
unknown's avatar
unknown committed
2768 2769 2770
  TABLE_LIST *org_tables=tables;
  for (; tables ; tables=tables->next)
  {
unknown's avatar
unknown committed
2771 2772
    if ((thd->master_access & want_access) == (want_access & ~EXTRA_ACL) &&
	thd->db)
unknown's avatar
unknown committed
2773
      tables->grant.privilege= want_access;
unknown's avatar
unknown committed
2774
    else if (tables->db && tables->db == thd->db)
unknown's avatar
unknown committed
2775 2776 2777 2778 2779
    {
      if (found && !grant_option)		// db already checked
	tables->grant.privilege=found_access;
      else
      {
2780 2781
	if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
			 0, no_errors))
unknown's avatar
unknown committed
2782 2783
	  return TRUE;				// Access denied
	found_access=tables->grant.privilege;
unknown's avatar
unknown committed
2784
	found=1;
unknown's avatar
unknown committed
2785 2786
      }
    }
unknown's avatar
unknown committed
2787
    else if (tables->db && check_access(thd,want_access,tables->db,&tables->grant.privilege,
2788
			  0, no_errors))
2789
      return TRUE;
unknown's avatar
unknown committed
2790 2791
  }
  if (grant_option)
2792
    return check_grant(thd,want_access & ~EXTRA_ACL,org_tables,
2793
		       test(want_access & EXTRA_ACL), no_errors);
unknown's avatar
unknown committed
2794 2795 2796 2797
  return FALSE;
}


unknown's avatar
unknown committed
2798
static bool check_db_used(THD *thd,TABLE_LIST *tables)
unknown's avatar
unknown committed
2799 2800 2801 2802 2803 2804 2805
{
  for (; tables ; tables=tables->next)
  {
    if (!tables->db)
    {
      if (!(tables->db=thd->db))
      {
2806
	send_error(thd,ER_NO_DB_ERROR);	/* purecov: tested */
unknown's avatar
unknown committed
2807 2808 2809 2810 2811 2812 2813 2814
	return TRUE;				/* purecov: tested */
      }
    }
  }
  return FALSE;
}


2815 2816
static bool check_merge_table_access(THD *thd, char *db,
				     TABLE_LIST *table_list)
2817 2818 2819 2820
{
  int error=0;
  if (table_list)
  {
2821
    /* Check that all tables use the current database */
2822 2823
    TABLE_LIST *tmp;
    for (tmp=table_list; tmp ; tmp=tmp->next)
2824 2825 2826
    {
      if (!tmp->db || !tmp->db[0])
	tmp->db=db;
unknown's avatar
unknown committed
2827
      else if (strcmp(tmp->db,db))
2828
      {
2829
	send_error(thd,ER_UNION_TABLES_IN_DIFFERENT_DIR);
2830 2831 2832
	return 1;
      }
    }
2833 2834 2835 2836 2837 2838 2839
    error=check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
			     table_list);
  }
  return error;
}


unknown's avatar
unknown committed
2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896
/****************************************************************************
	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

bool check_stack_overrun(THD *thd,char *buf __attribute__((unused)))
{
  long stack_used;
  if ((stack_used=used_stack(thd->thread_stack,(char*) &stack_used)) >=
      (long) thread_stack_min)
  {
    sprintf(errbuff[0],ER(ER_STACK_OVERRUN),stack_used,thread_stack);
    my_message(ER_STACK_OVERRUN,errbuff[0],MYF(0));
    thd->fatal_error=1;
    return 1;
  }
  return 0;
}

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

bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, int *yystacksize)
{
  LEX	*lex=current_lex;
  int  old_info=0;
  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;
}


/****************************************************************************
2897
	Initialize global thd variables needed for query
unknown's avatar
unknown committed
2898 2899
****************************************************************************/

2900
void
unknown's avatar
unknown committed
2901 2902 2903
mysql_init_query(THD *thd)
{
  DBUG_ENTER("mysql_init_query");
unknown's avatar
unknown committed
2904
  thd->lex.unit.init_query();
2905
  thd->lex.unit.init_select();
unknown's avatar
unknown committed
2906 2907
  thd->lex.select_lex.init_query();
  thd->lex.unit.slave= &thd->lex.select_lex;
unknown's avatar
unknown committed
2908
  thd->lex.unit.global_parameters= &thd->lex.select_lex; //Global limit & order
unknown's avatar
unknown committed
2909 2910
  thd->lex.select_lex.master= &thd->lex.unit;
  thd->lex.select_lex.prev= &thd->lex.unit.slave;
unknown's avatar
unknown committed
2911
  thd->select_number= thd->lex.select_lex.select_number= 1;
unknown's avatar
unknown committed
2912
  thd->lex.value_list.empty();
unknown's avatar
unknown committed
2913
  thd->free_list= 0;
2914
  thd->lex.current_select= &thd->lex.select_lex;
unknown's avatar
unknown committed
2915
  thd->lex.olap=thd->lex.describe=0;
2916
  thd->lex.select_lex.olap= UNSPECIFIED_OLAP_TYPE;
unknown's avatar
unknown committed
2917
  thd->fatal_error= 0;				// Safety
2918
  thd->total_warn_count=0;			// Warnings for this query
unknown's avatar
unknown committed
2919 2920
  thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
  thd->sent_row_count= thd->examined_row_count= 0;
unknown's avatar
unknown committed
2921
  thd->rand_used=0;
unknown's avatar
unknown committed
2922
  thd->safe_to_cache_query= 1;
unknown's avatar
unknown committed
2923
  thd->lex.param_list.empty();
unknown's avatar
unknown committed
2924 2925 2926
  DBUG_VOID_RETURN;
}

2927 2928 2929
void
mysql_init_select(LEX *lex)
{
unknown's avatar
unknown committed
2930
  SELECT_LEX *select_lex= lex->current_select->select_lex();
2931
  DBUG_ASSERT(select_lex->linkage != GLOBAL_OPTIONS_TYPE);
unknown's avatar
unknown committed
2932
  select_lex->init_select();
unknown's avatar
unknown committed
2933
  select_lex->master_unit()->select_limit= select_lex->select_limit= 
unknown's avatar
unknown committed
2934
    lex->thd->variables.select_limit;
2935
  select_lex->olap=   UNSPECIFIED_OLAP_TYPE;
unknown's avatar
unknown committed
2936
  lex->exchange= 0;
2937
  lex->result= 0;
unknown's avatar
unknown committed
2938
  lex->proc_list.first= 0;
2939 2940
}

2941

unknown's avatar
unknown committed
2942
bool
unknown's avatar
unknown committed
2943
mysql_new_select(LEX *lex, bool move_down)
2944
{
2945
  SELECT_LEX *select_lex = new SELECT_LEX();
unknown's avatar
unknown committed
2946
  select_lex->select_number= ++lex->thd->select_number;
unknown's avatar
unknown committed
2947 2948
  if (!select_lex)
    return 1;
unknown's avatar
unknown committed
2949 2950 2951 2952 2953
  select_lex->init_query();
  select_lex->init_select();
  if (move_down)
  {
    /* first select_lex of subselect or derived table */
2954
    SELECT_LEX_UNIT *unit= new SELECT_LEX_UNIT();
unknown's avatar
unknown committed
2955 2956 2957 2958
    if (!unit)
      return 1;
    unit->init_query();
    unit->init_select();
2959
    unit->include_down(lex->current_select);
unknown's avatar
unknown committed
2960 2961 2962
    select_lex->include_down(unit);
  }
  else
2963
    select_lex->include_neighbour(lex->current_select);
unknown's avatar
unknown committed
2964
    
2965
  select_lex->master_unit()->global_parameters= select_lex;
2966
  DBUG_ASSERT(lex->current_select->linkage != GLOBAL_OPTIONS_TYPE);
unknown's avatar
unknown committed
2967
  select_lex->include_global(lex->current_select->select_lex()->
2968 2969
			     next_select_in_list_addr());
  lex->current_select= select_lex;
unknown's avatar
unknown committed
2970
  return 0;
2971
}
unknown's avatar
unknown committed
2972

2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999
/*
  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)
{
  LEX *lex;
  LEX_STRING tmp;
  DBUG_ENTER("create_select_for_variable");
  lex= current_lex;
  mysql_init_select(lex);
  lex->sql_command= SQLCOM_SELECT;
  tmp.str= (char*) var_name;
  tmp.length=strlen(var_name);
  add_item_to_list(get_system_var(OPT_SESSION, tmp));
  DBUG_VOID_RETURN;
}

3000

unknown's avatar
unknown committed
3001 3002
void mysql_init_multi_delete(LEX *lex)
{
unknown's avatar
unknown committed
3003
  lex->sql_command=  SQLCOM_DELETE_MULTI;
unknown's avatar
unknown committed
3004
  mysql_init_select(lex);
3005
  lex->select_lex.select_limit= lex->unit.select_limit_cnt=
unknown's avatar
unknown committed
3006
    HA_POS_ERROR;
unknown's avatar
unknown committed
3007
  lex->auxilliary_table_list= lex->select_lex.table_list;
3008
  lex->select_lex.init_query();
unknown's avatar
unknown committed
3009
}
unknown's avatar
unknown committed
3010

3011

unknown's avatar
unknown committed
3012
void
unknown's avatar
unknown committed
3013
mysql_parse(THD *thd, char *inBuf, uint length)
unknown's avatar
unknown committed
3014 3015 3016 3017 3018
{
  DBUG_ENTER("mysql_parse");

  mysql_init_query(thd);
  thd->query_length = length;
unknown's avatar
unknown committed
3019
  thd->lex.derived_tables= false;
unknown's avatar
unknown committed
3020
  if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
unknown's avatar
unknown committed
3021 3022 3023 3024
  {
    LEX *lex=lex_start(thd, (uchar*) inBuf, length);
    if (!yyparse() && ! thd->fatal_error)
    {
3025 3026
      if (mqh_used && thd->user_connect &&
	  check_mqh(thd, thd->lex.sql_command))
3027 3028 3029 3030 3031
      {
	thd->net.error = 0;
      }
      else
      {
3032
	mysql_execute_command(thd);
3033 3034
	query_cache_end_of_result(&thd->net);
      }
unknown's avatar
unknown committed
3035 3036
    }
    else
3037 3038 3039
    {
      DBUG_PRINT("info",("Command aborted. Fatal_error: %d",
			 thd->fatal_error));
unknown's avatar
unknown committed
3040
      query_cache_abort(&thd->net);
3041
    }
unknown's avatar
unknown committed
3042
    thd->proc_info="freeing items";
3043
    free_items(thd->free_list);  /* Free strings used by items */
unknown's avatar
unknown committed
3044 3045
    lex_end(lex);
  }
unknown's avatar
unknown committed
3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066
  DBUG_VOID_RETURN;
}


inline static void
link_in_list(SQL_LIST *list,byte *element,byte **next)
{
  list->elements++;
  (*list->next)=element;
  list->next=next;
  *next=0;
}


/*****************************************************************************
** Store field definition for create
** Return 0 if ok
******************************************************************************/

bool add_field_to_list(char *field_name, enum_field_types type,
		       char *length, char *decimals,
3067 3068
		       uint type_modifier,
		       Item *default_value, Item *comment,
3069
		       char *change, TYPELIB *interval, CHARSET_INFO *cs)
unknown's avatar
unknown committed
3070 3071 3072 3073 3074 3075 3076 3077 3078
{
  register create_field *new_field;
  THD	*thd=current_thd;
  LEX  *lex= &thd->lex;
  uint allowed_type_modifier=0;
  DBUG_ENTER("add_field_to_list");

  if (strlen(field_name) > NAME_LEN)
  {
3079
    net_printf(thd, ER_TOO_LONG_IDENT, field_name); /* purecov: inspected */
unknown's avatar
unknown committed
3080 3081 3082 3083 3084
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  if (type_modifier & PRI_KEY_FLAG)
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
3085
    lex->key_list.push_back(new Key(Key::PRIMARY, NullS, HA_KEY_ALG_UNDEF,
unknown's avatar
unknown committed
3086 3087 3088 3089 3090 3091
				    lex->col_list));
    lex->col_list.empty();
  }
  if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG))
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
3092
    lex->key_list.push_back(new Key(Key::UNIQUE, NullS, HA_KEY_ALG_UNDEF,
unknown's avatar
unknown committed
3093 3094 3095 3096 3097 3098 3099 3100 3101
				    lex->col_list));
    lex->col_list.empty();
  }

  if (default_value && default_value->type() == Item::NULL_ITEM)
  {
    if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) ==
	NOT_NULL_FLAG)
    {
3102
      net_printf(thd,ER_INVALID_DEFAULT,field_name);
unknown's avatar
unknown committed
3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121
      DBUG_RETURN(1);
    }
    default_value=0;
  }
  if (!(new_field=new create_field()))
    DBUG_RETURN(1);
  new_field->field=0;
  new_field->field_name=field_name;
  new_field->def= (type_modifier & AUTO_INCREMENT_FLAG ? 0 : default_value);
  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;
  new_field->pack_length=0;
3122
  new_field->charset=cs;
unknown's avatar
unknown committed
3123

3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134
  if (!comment)
  {
    new_field->comment.str=0;
    new_field->comment.length=0;
  }
  else
  {
    /* In this case comment is always of type Item_string */
    new_field->comment.str=   (char*) comment->str_value.ptr();
    new_field->comment.length=comment->str_value.length();
  }
unknown's avatar
unknown committed
3135 3136 3137 3138 3139 3140
  if (length)
    if (!(new_field->length= (uint) atoi(length)))
      length=0; /* purecov: inspected */
  uint sign_len=type_modifier & UNSIGNED_FLAG ? 0 : 1;

  if (new_field->length && new_field->decimals &&
3141
      new_field->length < new_field->decimals+1 &&
unknown's avatar
unknown committed
3142
      new_field->decimals != NOT_FIXED_DEC)
3143
    new_field->length=new_field->decimals+1; /* purecov: inspected */
unknown's avatar
unknown committed
3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168

  switch (type) {
  case FIELD_TYPE_TINY:
    if (!length) new_field->length=3+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_SHORT:
    if (!length) new_field->length=5+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_INT24:
    if (!length) new_field->length=8+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONG:
    if (!length) new_field->length=10+sign_len;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_LONGLONG:
    if (!length) new_field->length=20;
    allowed_type_modifier= AUTO_INCREMENT_FLAG;
    break;
  case FIELD_TYPE_STRING:
  case FIELD_TYPE_VAR_STRING:
  case FIELD_TYPE_NULL:
unknown's avatar
unknown committed
3169
  case FIELD_TYPE_GEOMETRY:
unknown's avatar
unknown committed
3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187
    break;
  case FIELD_TYPE_DECIMAL:
    if (!length)
      new_field->length = 10;			// Default length for DECIMAL
    new_field->length+=sign_len;
    if (new_field->decimals)
      new_field->length++;
    break;
  case FIELD_TYPE_BLOB:
  case FIELD_TYPE_TINY_BLOB:
  case FIELD_TYPE_LONG_BLOB:
  case FIELD_TYPE_MEDIUM_BLOB:
    if (default_value)				// Allow empty as default value
    {
      String str,*res;
      res=default_value->val_str(&str);
      if (res->length())
      {
3188
	net_printf(thd,ER_BLOB_CANT_HAVE_DEFAULT,field_name); /* purecov: inspected */
unknown's avatar
unknown committed
3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207
	DBUG_RETURN(1); /* purecov: inspected */
      }
      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)
      {
3208
	net_printf(thd,ER_WRONG_FIELD_SPEC,field_name);
unknown's avatar
unknown committed
3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261
	DBUG_RETURN(1);
      }
      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
    else
    {
      new_field->length=((new_field->length+1)/2)*2; /* purecov: inspected */
      new_field->length= min(new_field->length,14); /* purecov: inspected */
    }
    new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG | NOT_NULL_FLAG;
    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:
    {
      if (interval->count > sizeof(longlong)*8)
      {
3262
	net_printf(thd,ER_TOO_BIG_SET,field_name); /* purecov: inspected */
unknown's avatar
unknown committed
3263 3264 3265 3266 3267 3268 3269 3270
	DBUG_RETURN(1);				/* purecov: inspected */
      }
      new_field->pack_length=(interval->count+7)/8;
      if (new_field->pack_length > 4)
	new_field->pack_length=8;
      new_field->interval=interval;
      new_field->length=0;
      for (const char **pos=interval->type_names; *pos ; pos++)
unknown's avatar
unknown committed
3271 3272 3273
      {
	new_field->length+=(uint) strip_sp((char*) *pos)+1;
      }
unknown's avatar
unknown committed
3274 3275 3276 3277 3278 3279 3280 3281 3282 3283
      new_field->length--;
      set_if_smaller(new_field->length,MAX_FIELD_WIDTH-1);
      if (default_value)
      {
	thd->cuted_fields=0;
	String str,*res;
	res=default_value->val_str(&str);
	(void) find_set(interval,res->ptr(),res->length());
	if (thd->cuted_fields)
	{
3284
	  net_printf(thd,ER_INVALID_DEFAULT,field_name);
unknown's avatar
unknown committed
3285 3286 3287 3288 3289 3290 3291 3292 3293
	  DBUG_RETURN(1);
	}
      }
    }
    break;
  case FIELD_TYPE_ENUM:
    {
      new_field->interval=interval;
      new_field->pack_length=interval->count < 256 ? 1 : 2; // Should be safe
unknown's avatar
unknown committed
3294
      new_field->length=(uint) strip_sp((char*) interval->type_names[0]);
unknown's avatar
unknown committed
3295 3296
      for (const char **pos=interval->type_names+1; *pos ; pos++)
      {
unknown's avatar
unknown committed
3297
	uint length=(uint) strip_sp((char*) *pos);
unknown's avatar
unknown committed
3298 3299 3300 3301 3302 3303 3304 3305 3306
	set_if_bigger(new_field->length,length);
      }
      set_if_smaller(new_field->length,MAX_FIELD_WIDTH-1);
      if (default_value)
      {
	String str,*res;
	res=default_value->val_str(&str);
	if (!find_enum(interval,res->ptr(),res->length()))
	{
3307
	  net_printf(thd,ER_INVALID_DEFAULT,field_name);
unknown's avatar
unknown committed
3308 3309 3310 3311 3312 3313 3314 3315 3316
	  DBUG_RETURN(1);
	}
      }
      break;
    }
  }

  if (new_field->length >= MAX_FIELD_WIDTH ||
      (!new_field->length && !(new_field->flags & BLOB_FLAG) &&
unknown's avatar
unknown committed
3317
       type != FIELD_TYPE_STRING && type != FIELD_TYPE_VAR_STRING))
unknown's avatar
unknown committed
3318
  {
3319
    net_printf(thd,ER_TOO_BIG_FIELDLENGTH,field_name,
unknown's avatar
unknown committed
3320 3321 3322 3323 3324 3325
	       MAX_FIELD_WIDTH-1);		/* purecov: inspected */
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  type_modifier&= AUTO_INCREMENT_FLAG;
  if ((~allowed_type_modifier) & type_modifier)
  {
3326
    net_printf(thd,ER_WRONG_FIELD_SPEC,field_name);
unknown's avatar
unknown committed
3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367
    DBUG_RETURN(1);
  }
  if (!new_field->pack_length)
    new_field->pack_length=calc_pack_length(new_field->sql_type ==
					    FIELD_TYPE_VAR_STRING ?
					    FIELD_TYPE_STRING :
					    new_field->sql_type,
					    new_field->length);
  lex->create_list.push_back(new_field);
  lex->last_field=new_field;
  DBUG_RETURN(0);
}

/* 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
add_proc_to_list(Item *item)
{
  ORDER *order;
  Item	**item_ptr;

  if (!(order = (ORDER *) sql_alloc(sizeof(ORDER)+sizeof(Item*))))
    return 1;
  item_ptr = (Item**) (order+1);
  *item_ptr= item;
  order->item=item_ptr;
  order->free_me=0;
  link_in_list(&current_lex->proc_list,(byte*) order,(byte**) &order->next);
  return 0;
}


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

static void remove_escape(char *name)
{
3368 3369
  if (!*name)					// For empty DB names
    return;
unknown's avatar
unknown committed
3370 3371
  char *to;
#ifdef USE_MB
unknown's avatar
unknown committed
3372
  char *strend=name+(uint) strlen(name);
unknown's avatar
unknown committed
3373 3374 3375 3376 3377 3378
#endif
  for (to=name; *name ; name++)
  {
#ifdef USE_MB
    int l;
/*    if ((l = ismbchar(name, name+MBMAXLEN))) { Wei He: I think it's wrong */
3379 3380
    if (use_mb(system_charset_info) &&
        (l = my_ismbchar(system_charset_info, name, strend)))
unknown's avatar
unknown committed
3381 3382 3383 3384 3385 3386 3387 3388
    {
	while (l--)
	    *to++ = *name++;
	name--;
	continue;
    }
#endif
    if (*name == '\\' && name[1])
unknown's avatar
unknown committed
3389
      name++;					// Skip '\\'
unknown's avatar
unknown committed
3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417
    *to++= *name;
  }
  *to=0;
}

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


bool add_to_list(SQL_LIST &list,Item *item,bool asc)
{
  ORDER *order;
  Item	**item_ptr;
  DBUG_ENTER("add_to_list");
  if (!(order = (ORDER *) sql_alloc(sizeof(ORDER)+sizeof(Item*))))
    DBUG_RETURN(1);
  item_ptr = (Item**) (order+1);
  *item_ptr=item;
  order->item= item_ptr;
  order->asc = asc;
  order->free_me=0;
  order->used=0;
  link_in_list(&list,(byte*) order,(byte**) &order->next);
  DBUG_RETURN(0);
}


3418 3419 3420 3421 3422 3423
TABLE_LIST *st_select_lex::add_table_to_list(Table_ident *table,
					     LEX_STRING *alias,
					     bool updating,
					     thr_lock_type flags,
					     List<String> *use_index,
					     List<String> *ignore_index)
unknown's avatar
unknown committed
3424 3425 3426 3427 3428 3429 3430 3431 3432 3433
{
  register TABLE_LIST *ptr;
  THD	*thd=current_thd;
  char *alias_str;
  DBUG_ENTER("add_table_to_list");

  if (!table)
    DBUG_RETURN(0);				// End of memory
  alias_str= alias ? alias->str : table->table.str;
  if (table->table.length > NAME_LEN ||
unknown's avatar
unknown committed
3434
      (table->table.length && check_table_name(table->table.str,table->table.length)) ||
3435
      table->db.str && check_db_name(table->db.str))
unknown's avatar
unknown committed
3436
  {
3437
    net_printf(thd,ER_WRONG_TABLE_NAME,table->table.str);
unknown's avatar
unknown committed
3438 3439 3440 3441
    DBUG_RETURN(0);
  }

  if (!alias)					/* Alias is case sensitive */
3442
    if (!(alias_str=thd->memdup(alias_str,table->table.length+1)))
unknown's avatar
unknown committed
3443
      DBUG_RETURN(0);
unknown's avatar
unknown committed
3444
    
unknown's avatar
unknown committed
3445
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
unknown's avatar
unknown committed
3446
    DBUG_RETURN(0);				/* purecov: inspected */
3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458
  if (table->db.str) 
  {
    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
  {
3459 3460
    /* The following can't be "" as we may do 'casedn_str()' on it */
    ptr->db= empty_c_string;
3461 3462 3463
    ptr->db_length= 0;
  }
    
3464
  ptr->alias= alias_str;
unknown's avatar
unknown committed
3465 3466
  if (lower_case_table_names)
  {
3467 3468
    my_casedn_str(system_charset_info,ptr->db);
    my_casedn_str(system_charset_info,table->table.str);
unknown's avatar
unknown committed
3469 3470
  }
  ptr->real_name=table->table.str;
3471
  ptr->real_name_length=table->table.length;
unknown's avatar
unknown committed
3472
  ptr->lock_type=flags;
3473
  ptr->updating=updating;
unknown's avatar
unknown committed
3474
  ptr->derived= (SELECT_LEX_UNIT *) table->sel;
unknown's avatar
unknown committed
3475
  if (use_index)
unknown's avatar
unknown committed
3476
    ptr->use_index=(List<String> *) thd->memdup((gptr) use_index,
unknown's avatar
unknown committed
3477 3478
					       sizeof(*use_index));
  if (ignore_index)
unknown's avatar
unknown committed
3479 3480
    ptr->ignore_index=(List<String> *) thd->memdup((gptr) ignore_index,
						   sizeof(*ignore_index));
unknown's avatar
unknown committed
3481 3482

  /* check that used name is unique */
unknown's avatar
unknown committed
3483
  if (flags != TL_IGNORE)
unknown's avatar
unknown committed
3484
  {
3485
    for (TABLE_LIST *tables=(TABLE_LIST*) table_list.first ;
unknown's avatar
unknown committed
3486
	 tables ;
unknown's avatar
unknown committed
3487
	 tables=tables->next)
unknown's avatar
unknown committed
3488
    {
3489
      if (!strcmp(alias_str,tables->alias) && !strcmp(ptr->db, tables->db))
unknown's avatar
unknown committed
3490
      {
3491
	net_printf(thd,ER_NONUNIQ_TABLE,alias_str); /* purecov: tested */
unknown's avatar
unknown committed
3492 3493
	DBUG_RETURN(0);				/* purecov: tested */
      }
unknown's avatar
unknown committed
3494 3495
    }
  }
3496
  link_in_list(&table_list, (byte*) ptr, (byte**) &ptr->next);
unknown's avatar
unknown committed
3497 3498 3499
  DBUG_RETURN(ptr);
}

unknown's avatar
unknown committed
3500

unknown's avatar
unknown committed
3501 3502
void add_join_on(TABLE_LIST *b,Item *expr)
{
3503 3504 3505 3506 3507 3508 3509
  if (!b->on_expr)
    b->on_expr=expr;
  else
  {
    // This only happens if you have both a right and left join
    b->on_expr=new Item_cond_and(b->on_expr,expr);
  }
unknown's avatar
unknown committed
3510 3511 3512 3513 3514 3515 3516 3517 3518 3519
}


void add_join_natural(TABLE_LIST *a,TABLE_LIST *b)
{
  b->natural_join=a;
}

	/* Check if name is used in table list */

unknown's avatar
unknown committed
3520
static bool check_dup(const char *db, const char *name, TABLE_LIST *tables)
unknown's avatar
unknown committed
3521 3522
{
  for (; tables ; tables=tables->next)
3523
    if (!strcmp(name,tables->real_name) && !strcmp(db,tables->db))
unknown's avatar
unknown committed
3524 3525 3526 3527
      return 1;
  return 0;
}

unknown's avatar
unknown committed
3528
bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables)
unknown's avatar
unknown committed
3529 3530 3531 3532 3533 3534
{
  bool result=0;

  select_errors=0;				/* Write if more errors */
  if (options & REFRESH_GRANT)
  {
3535
    acl_reload(thd);
unknown's avatar
unknown committed
3536
    grant_reload();
3537
    if (mqh_used)
3538
      reset_mqh(thd,(LEX_USER *) NULL,true);
unknown's avatar
unknown committed
3539 3540 3541
  }
  if (options & REFRESH_LOG)
  {
unknown's avatar
unknown committed
3542 3543 3544 3545
    mysql_log.new_file(1);
    mysql_update_log.new_file(1);
    mysql_bin_log.new_file(1);
    mysql_slow_log.new_file(1);
unknown's avatar
unknown committed
3546 3547 3548
    if (ha_flush_logs())
      result=1;
  }
unknown's avatar
unknown committed
3549
#ifdef HAVE_QUERY_CACHE
unknown's avatar
unknown committed
3550 3551
  if (options & REFRESH_QUERY_CACHE_FREE)
  {
unknown's avatar
unknown committed
3552
    query_cache.pack();				// FLUSH QUERY CACHE
unknown's avatar
unknown committed
3553 3554 3555 3556
    options &= ~REFRESH_QUERY_CACHE; //don't flush all cache, just free memory
  }
  if (options & (REFRESH_TABLES | REFRESH_QUERY_CACHE))
  {
unknown's avatar
unknown committed
3557
    query_cache.flush();			// RESET QUERY CACHE
unknown's avatar
unknown committed
3558
  }
unknown's avatar
unknown committed
3559
#endif /*HAVE_QUERY_CACHE*/
unknown's avatar
unknown committed
3560 3561
  if (options & (REFRESH_TABLES | REFRESH_READ_LOCK))
  {
3562
    if ((options & REFRESH_READ_LOCK) && thd)
unknown's avatar
unknown committed
3563
    {
3564 3565
      if (lock_global_read_lock(thd))
	return 1;
unknown's avatar
unknown committed
3566
    }
unknown's avatar
unknown committed
3567
    result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1, tables);
unknown's avatar
unknown committed
3568 3569 3570 3571 3572 3573 3574 3575
  }
  if (options & REFRESH_HOSTS)
    hostname_cache_refresh();
  if (options & REFRESH_STATUS)
    refresh_status();
  if (options & REFRESH_THREADS)
    flush_thread_cache();
  if (options & REFRESH_MASTER)
3576 3577
    if (reset_master(thd))
      result=1;
unknown's avatar
unknown committed
3578
#ifdef OPENSSL
3579 3580 3581 3582 3583 3584
   if (options & REFRESH_DES_KEY_FILE)
   {
     if (des_key_file)
       result=load_des_key_file(des_key_file);
   }
#endif
3585 3586 3587
 if (options & REFRESH_SLAVE)
 {
   LOCK_ACTIVE_MI;
3588
   if (reset_slave(thd, active_mi))
3589 3590 3591 3592
     result=1;
   UNLOCK_ACTIVE_MI;
 }
 if (options & REFRESH_USER_RESOURCES)
3593
   reset_mqh(thd,(LEX_USER *) NULL);
3594
 return result;
unknown's avatar
unknown committed
3595 3596 3597
}


3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609
/*
  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
*/

3610
void kill_one_thread(THD *thd, ulong id)
unknown's avatar
unknown committed
3611 3612 3613
{
  THD *tmp;
  uint error=ER_NO_SUCH_THREAD;
3614 3615
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
  I_List_iterator<THD> it(threads);
unknown's avatar
unknown committed
3616 3617 3618 3619
  while ((tmp=it++))
  {
    if (tmp->thread_id == id)
    {
3620 3621
      pthread_mutex_lock(&tmp->LOCK_delete);	// Lock from delete
      break;
unknown's avatar
unknown committed
3622 3623 3624
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637
  if (tmp)
  {
    if ((thd->master_access & SUPER_ACL) ||
	!strcmp(thd->user,tmp->user))
    {
      tmp->awake(1 /*prepare to die*/);
      error=0;
    }
    else
      error=ER_KILL_DENIED_ERROR;
    pthread_mutex_unlock(&tmp->LOCK_delete);
  }

unknown's avatar
unknown committed
3638
  if (!error)
3639
    send_ok(thd);
unknown's avatar
unknown committed
3640
  else
3641
    net_printf(thd,error,id);
unknown's avatar
unknown committed
3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657
}

/* Clear most status variables */

static void refresh_status(void)
{
  pthread_mutex_lock(&THR_LOCK_keycache);
  pthread_mutex_lock(&LOCK_status);
  for (struct show_var_st *ptr=status_vars; ptr->name; ptr++)
  {
    if (ptr->type == SHOW_LONG)
      *(ulong*) ptr->value=0;
  }
  pthread_mutex_unlock(&LOCK_status);
  pthread_mutex_unlock(&THR_LOCK_keycache);
}
3658 3659 3660 3661


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

unknown's avatar
unknown committed
3662
static bool append_file_to_dir(THD *thd, char **filename_ptr, char *table_name)
3663
{
3664
  char buff[FN_REFLEN],*ptr, *end;
3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676
  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))
  {
    my_error(ER_WRONG_TABLE_NAME, MYF(0), *filename_ptr);
    return 1;
  }
  /* Fix is using unix filename format on dos */
  strmov(buff,*filename_ptr);
3677
  end=convert_dirname(buff, *filename_ptr, NullS);
unknown's avatar
unknown committed
3678
  if (!(ptr=thd->alloc((uint) (end-buff)+(uint) strlen(table_name)+1)))
3679 3680
    return 1;					// End of memory
  *filename_ptr=ptr;
3681
  strxmov(ptr,buff,table_name,NullS);
3682 3683
  return 0;
}
3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698

/*
  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;
3699
  if (thd->lex.current_select != &thd->lex.select_lex)
3700 3701 3702 3703
  {
    char command[80];
    strmake(command, thd->lex.yylval->symbol.str,
	    min(thd->lex.yylval->symbol.length, sizeof(command)-1));
3704
    net_printf(thd, ER_CANT_USE_OPTION_HERE, command);
3705 3706 3707 3708
    return 1;
  }
  return 0;
}