sql_parse.cc 85.9 KB
Newer Older
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
2

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

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

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

17 18 19 20
#ifdef EMBEDDED_LIBRARY
#define net_read_timeout net_read_timeout1
#define net_write_timeout net_write_timeout1
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
21 22 23

#include "mysql_priv.h"
#include "sql_acl.h"
24
#include "sql_repl.h"
bk@work.mysql.com's avatar
bk@work.mysql.com committed
25 26 27 28
#include <m_ctype.h>
#include <thr_alarm.h>
#include <myisam.h>
#include <my_dir.h>
29
#include <assert.h>
bk@work.mysql.com's avatar
bk@work.mysql.com committed
30 31 32 33 34

#define SCRAMBLE_LENGTH 8

extern int yyparse(void);
extern "C" pthread_mutex_t THR_LOCK_keycache;
35 36 37
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
38

39 40 41
static int check_for_max_user_connections(const char *user, int u_length,
					  const char *host);
static void decrease_user_connections(const char *user, const char *host);
42
static bool check_db_used(THD *thd,TABLE_LIST *tables);
43
static bool check_merge_table_access(THD *thd, char *db, TABLE_LIST *tables);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
44 45 46 47 48
static bool check_dup(THD *thd,const char *db,const char *name,
		      TABLE_LIST *tables);
static void mysql_init_query(THD *thd);
static void remove_escape(char *name);
static void refresh_status(void);
49
static bool append_file_to_dir(char **filename_ptr, char *table_name);
50
static int create_total_list(THD *thd, LEX *lex, TABLE_LIST **result);
51
static int handle_create_select(THD *thd, LEX *lex, select_result *c_i);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
52

53
const char *any_db="*any*";	// Special symbol for check_access
bk@work.mysql.com's avatar
bk@work.mysql.com committed
54 55 56 57 58

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",
59
  "Binlog Dump","Table Dump",  "Connect Out", "Register Slave"
bk@work.mysql.com's avatar
bk@work.mysql.com committed
60 61 62 63 64
};

bool volatile abort_slave = 0;

#ifdef HAVE_OPENSSL
65
extern struct st_VioSSLAcceptorFd * ssl_acceptor_fd;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
#endif /* HAVE_OPENSSL */

#ifdef __WIN__
static void  test_signal(int sig_ptr)
{
#ifndef DBUG_OFF
  MessageBox(NULL,"Test signal","DBUG",MB_OK);
#endif
}
static void init_signals(void)
{
  int signals[7] = {SIGINT,SIGILL,SIGFPE,SIGSEGV,SIGTERM,SIGBREAK,SIGABRT } ;
  for(int i=0 ; i < 7 ; i++)
    signal( signals[i], test_signal) ;
}
#endif

83
inline bool end_active_trans(THD *thd)
84
{
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
85
  int error=0;
86
  if (thd->options & (OPTION_NOT_AUTO_COMMIT | OPTION_BEGIN))
87
  {
88 89
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
90
    if (ha_commit(thd))
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
91
      error=1;
92
  }
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
93
  return error;
94 95 96
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121
/*
** Check if user is ok
** Updates:
** thd->user, thd->master_access, thd->priv_user, thd->db, thd->db_access
*/

static bool check_user(THD *thd,enum_server_command command, const char *user,
		       const char *passwd, const char *db, bool check_count)
{
  NET *net= &thd->net;
  thd->db=0;

  if (!(thd->user = my_strdup(user, MYF(0))))
  {
    send_error(net,ER_OUT_OF_RESOURCES);
    return 1;
  }
  thd->master_access=acl_getroot(thd->host, thd->ip, thd->user,
				 passwd, thd->scramble, &thd->priv_user,
				 protocol_version == 9 ||
				 !(thd->client_capabilities &
				   CLIENT_LONG_PASSWORD));
  DBUG_PRINT("general",
	     ("Capabilities: %d  packet_length: %d  Host: '%s'  User: '%s'  Using password: %s  Access: %u  db: '%s'",
	      thd->client_capabilities, thd->max_packet_length,
122
	      thd->host_or_ip, thd->priv_user,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
123 124 125 126 127 128
	      passwd[0] ? "yes": "no",
	      thd->master_access, thd->db ? thd->db : "*none*"));
  if (thd->master_access & NO_ACCESS)
  {
    net_printf(net, ER_ACCESS_DENIED_ERROR,
	       thd->user,
129
	       thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
130
	       passwd[0] ? ER(ER_YES) : ER(ER_NO));
131
    mysql_log.write(thd,COM_CONNECT,ER(ER_ACCESS_DENIED_ERROR),
bk@work.mysql.com's avatar
bk@work.mysql.com committed
132
		    thd->user,
133
		    thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
		    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 &&
	      !(thd->master_access & PROCESS_ACL));
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
    if (tmp)
    {						// Too many connections
      send_error(net, ER_CON_COUNT_ERROR);
      return(1);
    }
  }
149
  mysql_log.write(thd,command,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
150 151 152 153
		  (thd->priv_user == thd->user ?
		   (char*) "%s@%s on %s" :
		   (char*) "%s@%s as anonymous on %s"),
		  user,
154
		  thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
155 156
		  db ? db : (char*) "");
  thd->db_access=0;
157 158 159
  if (max_user_connections &&
      check_for_max_user_connections(user, strlen(user), thd->host))
    return -1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
160
  if (db && db[0])
161 162 163
  {
    bool error=test(mysql_change_db(thd,db));
    if (error)
164
      decrease_user_connections(thd->user,thd->host);
165 166
    return error;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
167 168 169 170 171
  else
    send_ok(net);				// Ready to handle questions
  return 0;					// ok
}

172 173 174 175 176 177 178 179 180 181 182
/*
** check for maximum allowable user connections
** if mysql server is started with corresponding
** variable that is greater then 0
*/

static HASH hash_user_connections;
static DYNAMIC_ARRAY  user_conn_array;
extern  pthread_mutex_t LOCK_user_conn;

struct  user_conn {
183 184
  char *user;
  uint len, connections;
185 186 187 188 189 190 191 192 193 194 195
};

static byte* get_key_conn(user_conn *buff, uint *length,
			  my_bool not_used __attribute__((unused)))
{
  *length=buff->len;
  return (byte*) buff->user;
}

#define DEF_USER_COUNT 50

196 197 198 199 200
static void free_user(struct user_conn *uc)
{
  my_free((char*) uc,MYF(0));
}

201 202 203
void init_max_user_conn(void) 
{
  (void) hash_init(&hash_user_connections,DEF_USER_COUNT,0,0,
204 205
		   (hash_get_key) get_key_conn, (void (*)(void*)) free_user,
		   0);
206 207 208 209 210 211
}


static int check_for_max_user_connections(const char *user, int u_length,
					  const char *host) 
{
212
  int error=1;
213 214 215 216 217 218 219
  uint temp_len;
  char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
  struct  user_conn *uc;
  if (!user)
    user="";
  if (!host)
    host="";
220 221 222
  DBUG_ENTER("check_for_max_user_connections");
  DBUG_PRINT("enter",("user: '%s'  host: '%s'", user, host));

223 224 225 226 227 228 229
  temp_len= (uint) (strxnmov(temp_user, sizeof(temp_user), user, "@", host,
			     NullS) - temp_user);
  (void) pthread_mutex_lock(&LOCK_user_conn);
  uc = (struct  user_conn *) hash_search(&hash_user_connections,
					 (byte*) temp_user, temp_len);
  if (uc) /* user found ; check for no. of connections */
  {
230
    if (max_user_connections ==  (uint) uc->connections) 
231 232
    {
      net_printf(&(current_thd->net),ER_TOO_MANY_USER_CONNECTIONS, temp_user);
233
      goto end;
234 235 236 237 238 239
    }
    uc->connections++; 
  }
  else
  {
    /* the user is not found in the cache; Insert it */
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256
    struct user_conn *uc= ((struct user_conn*)
			   my_malloc(sizeof(struct user_conn) + temp_len+1,
				     MYF(MY_WME)));
    if (!uc)
    {
      send_error(&current_thd->net, 0, NullS);	// Out of memory
      goto end;
    }      
    uc->user=(char*) (uc+1);
    memcpy(uc->user,temp_user,temp_len+1);
    uc->len = temp_len;
    uc->connections = 1;
    if (hash_insert(&hash_user_connections, (byte*) uc))
    {
      my_free((char*) uc,0);
      send_error(&current_thd->net, 0, NullS);	// Out of memory
      goto end;
257 258
    }
  }
259 260 261
  error=0;

end:
262
  (void) pthread_mutex_unlock(&LOCK_user_conn);
263
  DBUG_RETURN(error);
264 265 266 267 268 269 270
}


static void decrease_user_connections(const char *user, const char *host)
{
  char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
  int temp_len;
271
  struct user_conn *uc;
272 273
  if (!max_user_connections)
    return;
274 275 276 277
  if (!user)
    user="";
  if (!host)
    host="";
278 279 280
  DBUG_ENTER("decrease_user_connections");
  DBUG_PRINT("enter",("user: '%s'  host: '%s'", user, host));

281 282 283 284 285 286 287 288 289 290 291 292
  temp_len= (uint) (strxnmov(temp_user, sizeof(temp_user), user, "@", host,
			     NullS) - temp_user);
  (void) pthread_mutex_lock(&LOCK_user_conn);

  uc = (struct  user_conn *) hash_search(&hash_user_connections,
					 (byte*) temp_user, temp_len);
  dbug_assert(uc != 0);			// We should always find the user
  if (!uc)
    goto end;				// Safety; Something went wrong
  if (! --uc->connections)
  {
    /* Last connection for user; Delete it */
293
    (void) hash_delete(&hash_user_connections,(byte*) uc);
294 295 296
  }
end:
  (void) pthread_mutex_unlock(&LOCK_user_conn);
297
  DBUG_VOID_RETURN;
298 299
}

300

301 302 303 304 305
void free_max_user_conn(void)
{
  hash_free(&hash_user_connections);
}

bk@work.mysql.com's avatar
bk@work.mysql.com committed
306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326

/*
** check connnetion and get priviliges
** returns 0 on ok, -1 < if error is given > 0 on error.
*/


static int
check_connections(THD *thd)
{
  uint connect_errors=0;
  NET *net= &thd->net;
  /*
  ** store the connection details
  */
  DBUG_PRINT("info", (("check_connections called by thread %d"),
	     thd->thread_id));
  DBUG_PRINT("general",("New connection received on %s",
			vio_description(net->vio)));
  if (!thd->host)                           // If TCP/IP connection
  {
327
    char ip[30];
328

bk@work.mysql.com's avatar
bk@work.mysql.com committed
329 330 331 332
    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);
333
    thd->host_or_ip=thd->ip;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
334 335 336
#if !defined(HAVE_SYS_UN_H) || defined(HAVE_mit_thread)
    /* Fast local hostname resolve for Win32 */
    if (!strcmp(thd->ip,"127.0.0.1"))
337
      thd->host=(char*) localhost;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
338 339 340 341 342 343 344 345 346 347 348 349 350 351 352
    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);
    }
    DBUG_PRINT("general",("Host: %s  ip: %s",
			  thd->host ? thd->host : "unknown host",
			  thd->ip ? thd->ip : "unknown ip"));
    if (acl_check_host(thd->host,thd->ip))
      return(ER_HOST_NOT_PRIVILEGED);
  }
353
  else /* Hostname given means that the connection was on a socket */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
354
  {
355
    DBUG_PRINT("general",("Host: %s",thd->host));
356
    thd->host_or_ip=thd->host;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
357 358 359 360 361 362 363 364
    thd->ip=0;
    bzero((char*) &thd->remote,sizeof(struct sockaddr));
  }
  vio_keepalive(net->vio, TRUE);

  /* nasty, but any other way? */
  uint pkt_len = 0;
  {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
365 366
    /* buff[] needs to big enough to hold the server_version variable */
    char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH+32],*end;
367 368 369 370 371 372
    int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB;
    if (opt_using_transactions)
      client_flags|=CLIENT_TRANSACTIONS;
#ifdef HAVE_COMPRESS
    client_flags |= CLIENT_COMPRESS;
#endif /* HAVE_COMPRESS */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
373 374 375 376 377 378 379

    end=strmov(buff,server_version)+1;
    int4store((uchar*) end,thd->thread_id);
    end+=4;
    memcpy(end,thd->scramble,SCRAMBLE_LENGTH+1);
    end+=SCRAMBLE_LENGTH +1;
#ifdef HAVE_OPENSSL
380
    if (ssl_acceptor_fd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421
      client_flags |= CLIENT_SSL;       /* Wow, SSL is avalaible! */
    /*
     * 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?
  */
#define  SSL_HANDSHAKE_SIZE      2
#define  NORMAL_HANDSHAKE_SIZE   6
#define  MIN_HANDSHAKE_SIZE      2

#else
#define  MIN_HANDSHAKE_SIZE      6
#endif /* HAVE_OPENSSL */
    int2store(end,client_flags);
    end[2]=MY_CHARSET_CURRENT;
    int2store(end+3,thd->server_status);
    bzero(end+5,13);
    end+=18;
    if (net_write_command(net,protocol_version, buff,
			  (uint) (end-buff)) ||
       (pkt_len=my_net_read(net)) == packet_error ||
	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);
  if (thd->packet.alloc(net_buffer_length))
    return(ER_OUT_OF_RESOURCES);

  thd->client_capabilities=uint2korr(net->read_pos);
422 423
  if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
    thd->sql_mode|= MODE_IGNORE_SPACE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
424 425 426 427 428 429 430 431 432
#ifdef HAVE_OPENSSL
  DBUG_PRINT("info",
	     ("pkt_len:%d, client capabilities: %d",
	      pkt_len, thd->client_capabilities) );
  if (thd->client_capabilities & CLIENT_SSL)
  {
    DBUG_PRINT("info", ("Agreed to change IO layer to SSL") );
    /* Do the SSL layering. */
    DBUG_PRINT("info", ("IO layer change in progress..."));
433
    sslaccept(ssl_acceptor_fd, net->vio);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
    DBUG_PRINT("info", ("Reading user information over SSL layer"));
    if ((pkt_len=my_net_read(net)) == packet_error ||
	pkt_len < NORMAL_HANDSHAKE_SIZE)
    {
      DBUG_PRINT("info", ("pkt_len:%d", pkt_len));
      DBUG_PRINT("error", ("Failed to read user information"));
      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

  thd->max_packet_length=uint3korr(net->read_pos+2);
  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)
    thd->inactive_timeout=net_interactive_timeout;
465 466
  if ((thd->client_capabilities & CLIENT_TRANSACTIONS) &&
      opt_using_transactions)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
467 468 469 470 471 472 473 474 475 476 477 478 479
    thd->net.return_status= &thd->server_status;
  net->timeout=net_read_timeout;
  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  =
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
480
    (uint) ((thd->thr_create_time = time(NULL)) - thd->connect_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534
  if (launch_time >= slow_launch_time)
    statistic_increment(slow_launch_threads,&LOCK_status );

  pthread_detach_this_thread();

#ifndef __WIN__	/* Win32 calls this in pthread_create */
  if (my_thread_init()) // needed to be called first before we call
    // DBUG_ macros
  {
    close_connection(&thd->net,ER_OUT_OF_RESOURCES);
    statistic_increment(aborted_connects,&LOCK_thread_count);
    end_thread(thd,0);
    return 0;
  }
#endif

  // 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

  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_*

#ifdef __WIN__
  init_signals();				// IRENA; testing ?
#else
  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);
    statistic_increment(aborted_connects,&LOCK_thread_count);
    end_thread(thd,0);
    return 0;
  }

  do
  {
    int error;
    NET *net= &thd->net;

    thd->mysys_var=my_thread_var;
    thd->dbug_thread_id=my_thread_id();
    thd->thread_stack= (char*) &thd;

    if ((error=check_connections(thd)))
    {						// Wrong permissions
      if (error > 0)
535
	net_printf(net,error,thd->host_or_ip);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
536 537 538 539 540 541 542 543 544 545 546 547 548
#ifdef __NT__
      if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
	sleep(1);				/* must wait after eof() */
#endif
      statistic_increment(aborted_connects,&LOCK_thread_count);
      goto end_thread;
    }

    if (thd->max_join_size == HA_POS_ERROR)
      thd->options |= OPTION_BIG_SELECTS;
    if (thd->client_capabilities & CLIENT_COMPRESS)
      net->compress=1;				// Use compression

549
    thd->proc_info=0;				// Remove 'login'
550
    thd->command=COM_SLEEP;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
551 552
    thd->version=refresh_version;
    thd->set_time();
553
    init_sql_alloc(&thd->mem_root,8192,8192);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
554 555 556 557 558
    while (!net->error && net->vio != 0 && !thd->killed)
    {
      if (do_command(thd))
	break;
    }
559
    free_root(&thd->mem_root,MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
560 561
    if (net->error && net->vio != 0)
    {
562
      if (!thd->killed && opt_warnings)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
563 564
      sql_print_error(ER(ER_NEW_ABORTING_CONNECTION),
		      thd->thread_id,(thd->db ? thd->db : "unconnected"),
565
		      thd->user ? thd->user : "unauthenticated",
566
		      thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
567 568 569 570 571 572
		      (net->last_errno ? ER(net->last_errno) :
		       ER(ER_UNKNOWN_ERROR)));
      send_error(net,net->last_errno,NullS);
      thread_safe_increment(aborted_threads,&LOCK_thread_count);
    }

573
    decrease_user_connections(thd->user,thd->host);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
574 575 576 577 578 579 580 581 582 583 584 585 586
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 */
}

587 588 589 590
/*
  Execute commands from bootstrap_file.
  Used when creating the initial grant tables
*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
591

592
pthread_handler_decl(handle_bootstrap,arg)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
593
{
594 595 596
  THD *thd=(THD*) arg;
  FILE *file=bootstrap_file;
  char *buff;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
597

598
  /* The following must be called before DBUG_ENTER */
599
  if (my_thread_init() || thd->store_globals())
bk@work.mysql.com's avatar
bk@work.mysql.com committed
600 601
  {
    close_connection(&thd->net,ER_OUT_OF_RESOURCES);
602 603
    thd->fatal_error=1;
    goto end;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
604
  }
605 606 607 608
  DBUG_ENTER("handle_bootstrap");

  pthread_detach_this_thread();
  thd->thread_stack= (char*) &thd;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
609 610 611 612 613 614 615 616 617 618 619 620 621
  thd->mysys_var=my_thread_var;
  thd->dbug_thread_id=my_thread_id();
#ifndef __WIN__
  sigset_t set;
  VOID(sigemptyset(&set));			// Get mask in use
  VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif

  if (thd->max_join_size == (ulong) ~0L)
    thd->options |= OPTION_BIG_SELECTS;

  thd->proc_info=0;
  thd->version=refresh_version;
622
  thd->priv_user=thd->user=(char*)"boot";
bk@work.mysql.com's avatar
bk@work.mysql.com committed
623

624
  buff= (char*) thd->net.buff;
625
  init_sql_alloc(&thd->mem_root,8192,8192);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
626 627
  while (fgets(buff, thd->net.max_packet, file))
  {
628
    uint length=(uint) strlen(buff);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
629 630 631 632
    while (length && (isspace(buff[length-1]) || buff[length-1] == ';'))
      length--;
    buff[length]=0;
    thd->current_tablenr=0;
633
    thd->query= thd->memdup(buff,length+1);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
634 635 636 637
    thd->query_id=query_id++;
    mysql_parse(thd,thd->query,length);
    close_thread_tables(thd);			// Free tables
    if (thd->fatal_error)
638
      break;
639
    free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
640
  }
641 642 643 644 645 646 647 648 649 650 651
  thd->priv_user=thd->user=0;

  /* thd->fatal_error should be set in case something went wrong */
end:
  (void) pthread_mutex_lock(&LOCK_thread_count);
  thread_count--;
  (void) pthread_cond_broadcast(&COND_thread_count);
  (void) pthread_mutex_unlock(&LOCK_thread_count);
  my_thread_end();
  pthread_exit(0);
  DBUG_RETURN(0);				// Never reached
bk@work.mysql.com's avatar
bk@work.mysql.com committed
652 653 654
}


655
inline void free_items(THD *thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
656 657 658 659 660 661 662 663 664 665 666 667 668
{
    /* This works because items are allocated with sql_alloc() */
  for (Item *item=thd->free_list ; item ; item=item->next)
    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;
669
  if (!(table_list = (TABLE_LIST*) thd->calloc(sizeof(TABLE_LIST))))
670
    DBUG_RETURN(1); // out of memory
bk@work.mysql.com's avatar
bk@work.mysql.com committed
671 672 673 674 675
  table_list->db = db;
  table_list->real_name = table_list->name = tbl_name;
  table_list->lock_type = TL_READ_NO_INSERT;
  table_list->next = 0;
  remove_escape(table_list->real_name);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
676

677
  if (!(table=open_ltable(thd, table_list, TL_READ_NO_INSERT)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
678 679
    DBUG_RETURN(1);

680 681 682 683 684
  if (!db || check_db_name(db))
  {
    net_printf(&thd->net,ER_WRONG_DB_NAME, db ? db : "NULL");
    goto err;
  }
685
  if (check_access(thd, SELECT_ACL, db, &table_list->grant.privilege))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
686
    goto err;
687
  if (grant_option && check_grant(thd, SELECT_ACL, table_list))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
688 689 690 691 692 693 694 695 696 697
    goto err;

  thd->free_list = 0;
  thd->query = tbl_name;
  if((error = mysqld_dump_create_info(thd, table, -1)))
    {
      my_error(ER_GET_ERRNO, MYF(0));
      goto err;
    }
  net_flush(&thd->net);
698 699
  if ((error = table->file->dump(thd,fd)))
    my_error(ER_GET_ERRNO, MYF(0));
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
700

bk@work.mysql.com's avatar
bk@work.mysql.com committed
701
err:
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
702

bk@work.mysql.com's avatar
bk@work.mysql.com committed
703
  close_thread_tables(thd);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
704 705

  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738
}


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

bool do_command(THD *thd)
{
  char *packet;
  uint old_timeout,packet_length;
  NET *net;
  enum enum_server_command command;
  DBUG_ENTER("do_command");

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

  packet=0;
  old_timeout=net->timeout;
  net->timeout=thd->inactive_timeout;		/* Wait max for 8 hours */
  net->last_error[0]=0;				// Clear error message
  net->last_errno=0;

  net_new_transaction(net);
  if ((packet_length=my_net_read(net)) == packet_error)
  {
     DBUG_PRINT("general",("Got error reading command from socket %s",
				vio_description(net->vio) ));
    return TRUE;
  }
  else
  {
    packet=(char*) net->read_pos;
    command = (enum enum_server_command) (uchar) packet[0];
739
    DBUG_PRINT("general",("Command on %s = %d (%s)",
bk@work.mysql.com's avatar
bk@work.mysql.com committed
740 741 742
			  vio_description(net->vio), command,
			  command_name[command]));
  }
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757
  net->timeout=old_timeout;			// Timeout for writing
  DBUG_RETURN(dispatch_command(command,thd, packet+1, packet_length));
}


bool dispatch_command(enum enum_server_command command, THD *thd,
		      char* packet, uint packet_length)
{
  NET *net= &thd->net;
  bool	error=0;
  // 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
  bool slow_command=FALSE;
  DBUG_ENTER("dispatch_command");

bk@work.mysql.com's avatar
bk@work.mysql.com committed
758 759 760 761 762 763 764 765
  thd->command=command;
  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));
  thd->set_time();
766
  thd->lex.select_lex.options=0;		// We store status here
767
  switch (command) {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
768
  case COM_INIT_DB:
769
    if (!mysql_change_db(thd,packet))
770
      mysql_log.write(thd,command,"%s",thd->db);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
771
    break;
772 773 774 775 776 777 778 779
  case COM_REGISTER_SLAVE:
  {
    if(register_slave(thd, (uchar*)packet, packet_length))
      send_error(&thd->net);
    else
      send_ok(&thd->net);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
780 781
  case COM_TABLE_DUMP:
    {
782
      slow_command = TRUE;
783 784
      uint db_len = *(uchar*)packet;
      uint tbl_len = *(uchar*)(packet + db_len + 1);
785
      char* db = thd->alloc(db_len + tbl_len + 2);
786
      memcpy(db, packet + 1, db_len);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
787 788
      char* tbl_name = db + db_len;
      *tbl_name++ = 0;
789
      memcpy(tbl_name, packet + db_len + 2, tbl_len);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
790 791 792
      tbl_name[tbl_len] = 0;
      if(mysql_table_dump(thd, db, tbl_name, -1))
	send_error(&thd->net); // dump to NET
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
793

bk@work.mysql.com's avatar
bk@work.mysql.com committed
794 795 796 797
      break;
    }
  case COM_CHANGE_USER:
  {
798
    char *user=   (char*) packet;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813
    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;
    char *save_user=	    thd->user;
    char *save_priv_user=   thd->priv_user;
    char *save_db=	    thd->db;

    if ((uint) ((uchar*) db - net->read_pos) > packet_length)
    {						// Check if protocol is ok
      send_error(net, ER_UNKNOWN_COM_ERROR);
      break;
    }
814
    if (check_user(thd, COM_CHANGE_USER, user, passwd, db, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
815 816 817 818 819 820 821 822 823 824
    {						// 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;
      thd->user=save_user;
      thd->priv_user=save_priv_user;
      break;
    }
825
    decrease_user_connections (save_user, thd->host);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
826 827 828 829 830 831 832 833
    x_free((gptr) save_db);
    x_free((gptr) save_user);
    thd->password=test(passwd[0]);
    break;
  }

  case COM_QUERY:
  {
834
    char *pos=packet-1+packet_length;		// Point at end null
bk@work.mysql.com's avatar
bk@work.mysql.com committed
835 836 837 838 839 840
    /* Remove garage at end of query */
    while (packet_length > 0 && pos[-1] == ';')
    {
      pos--;
      packet_length--;
    }
841
    if (!(thd->query= (char*) thd->memdup((gptr) (packet),packet_length+1)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
842
      break;
843
    thd->query[packet_length]=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
844 845 846
    thd->packet.shrink(net_buffer_length);	// Reclaim some memory
    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),QUERY_PRIOR);
847
    mysql_log.write(thd,command,"%s",thd->query);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869
    DBUG_PRINT("query",("%s",thd->query));
    mysql_parse(thd,thd->query,packet_length-1);
    if (!(specialflag & SPECIAL_NO_PRIOR))
      my_pthread_setprio(pthread_self(),WAIT_PRIOR);
    DBUG_PRINT("info",("query ready"));
    break;
  }
  case COM_FIELD_LIST:				// This isn't actually neaded
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
    break;
#else
  {
    char *fields;
    TABLE_LIST table_list;
    bzero((char*) &table_list,sizeof(table_list));
    if (!(table_list.db=thd->db))
    {
      send_error(net,ER_NO_DB_ERROR);
      break;
    }
    thd->free_list=0;
870 871
    table_list.name=table_list.real_name=thd->strdup(packet);
    thd->query=fields=thd->strdup(strend(packet)+1);
872
    mysql_log.write(thd,command,"%s %s",table_list.real_name,fields);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
873 874 875 876 877 878 879 880 881 882 883 884 885
    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);
    free_items(thd);
    break;
  }
#endif
  case COM_QUIT:
886
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
887 888 889 890 891 892
    net->error=0;				// Don't give 'abort' message
    error=TRUE;					// End server
    break;

  case COM_CREATE_DB:
    {
893
      char *db=thd->strdup(packet);
894 895 896 897 898 899
      // null test to handle EOM
      if (!db || !stripp_sp(db) || check_db_name(db))
      {
	net_printf(&thd->net,ER_WRONG_DB_NAME, db ? db : "NULL");
	break;
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
900 901
      if (check_access(thd,CREATE_ACL,db,0,1))
	break;
902
      mysql_log.write(thd,command,packet);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
903 904 905 906 907
      mysql_create_db(thd,db,0);
      break;
    }
  case COM_DROP_DB:
    {
908
      char *db=thd->strdup(packet);
909 910 911 912 913 914
      // null test to handle EOM
      if (!db || !stripp_sp(db) || check_db_name(db))
      {
	net_printf(&thd->net,ER_WRONG_DB_NAME, db ? db : "NULL");
	break;
      }
915
      if (check_access(thd,DROP_ACL,db,0,1) || end_active_trans(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
916
	break;
917
      mysql_log.write(thd,command,db);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
918 919 920 921 922
      mysql_rm_db(thd,db,0);
      break;
    }
  case COM_BINLOG_DUMP:
    {
923
      slow_command = TRUE;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
924 925
      if(check_access(thd, FILE_ACL, any_db))
	break;
926
      mysql_log.write(thd,command, 0);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
927

bk@work.mysql.com's avatar
bk@work.mysql.com committed
928 929
      ulong pos;
      ushort flags;
930
      uint32 slave_server_id;
931 932
      pos = uint4korr(packet);
      flags = uint2korr(packet + 4);
933
      pthread_mutex_lock(&LOCK_server_id);
934
      kill_zombie_dump_threads(slave_server_id = uint4korr(packet+6));
935 936
      thd->server_id = slave_server_id;
      pthread_mutex_unlock(&LOCK_server_id);
937
      mysql_binlog_send(thd, thd->strdup(packet + 10), pos, flags);
938 939 940
      // fake COM_QUIT -- if we get here, the thread needs to terminate
      error = TRUE;
      net->error = 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
941 942 943 944
      break;
    }
  case COM_REFRESH:
    {
945
      uint options=(uchar) packet[0];
bk@work.mysql.com's avatar
bk@work.mysql.com committed
946 947
      if (check_access(thd,RELOAD_ACL,any_db))
	break;
948
      mysql_log.write(thd,command,NullS);
949
      if (reload_acl_and_cache(thd, options, (TABLE_LIST*) 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
950 951 952 953 954 955 956 957 958
	send_error(net,0);
      else
	send_eof(net);
      break;
    }
  case COM_SHUTDOWN:
    if (check_access(thd,SHUTDOWN_ACL,any_db))
      break; /* purecov: inspected */
    DBUG_PRINT("quit",("Got shutdown command"));
959
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
960 961 962 963 964 965 966
    send_eof(net);
#ifdef __WIN__
    sleep(1);					// must wait after eof()
#endif
    send_eof(net);				// This is for 'quit request'
    close_connection(net);
    close_thread_tables(thd);			// Free before kill
967
    free_root(&thd->mem_root,MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
968 969 970 971 972 973
    kill_mysql();
    error=TRUE;
    break;

  case COM_STATISTICS:
  {
974
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
975
    char buff[200];
976
    ulong uptime = (ulong) (thd->start_time - start_time);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
977
    sprintf((char*) buff,
978
	    "Uptime: %ld  Threads: %d  Questions: %lu  Slow queries: %ld  Opens: %ld  Flush tables: %ld  Open tables: %u  Queries per second avg: %.3f",
bk@work.mysql.com's avatar
bk@work.mysql.com committed
979 980 981 982 983 984 985 986 987
	    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
988
    VOID(my_net_write(net, buff,(uint) strlen(buff)));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
989 990 991 992 993 994 995
    VOID(net_flush(net));
    break;
  }
  case COM_PING:
    send_ok(net);				// Tell client we are alive
    break;
  case COM_PROCESS_INFO:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
996
    if (!thd->priv_user[0] && check_process_priv(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
997
      break;
998
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
999 1000 1001 1002 1003
    mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
			  thd->priv_user,0);
    break;
  case COM_PROCESS_KILL:
  {
1004
    ulong id=(ulong) uint4korr(packet);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1005 1006 1007 1008
    kill_one_thread(thd,id);
    break;
  }
  case COM_DEBUG:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1009
    if (check_process_priv(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1010 1011
      break;					/* purecov: inspected */
    mysql_print_status(thd);
1012
    mysql_log.write(thd,command,NullS);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
    send_eof(net);
    break;
  case COM_SLEEP:
  case COM_CONNECT:				// Impossible here
  case COM_TIME:				// Impossible from client
  case COM_DELAYED_INSERT:
  default:
    send_error(net, ER_UNKNOWN_COM_ERROR);
    break;
  }
  if (thd->lock || thd->open_tables)
  {
    thd->proc_info="closing tables";
    close_thread_tables(thd);			/* Free tables */
  }

  if (thd->fatal_error)
    send_error(net,0);				// End of memory ?

  time_t start_of_query=thd->start_time;
1033
  thd->end_time();				// Set start time
1034

1035
  /* If not reading from backup and if the query took too long */
1036
  if (!slow_command && !thd->user_time) // do not log 'slow_command' queries
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1037
  {
1038 1039
    thd->proc_info="logging slow query";

1040
    if ((ulong) (thd->start_time - thd->time_after_lock) > long_query_time ||
1041
	((thd->lex.select_lex.options &
1042
	  (QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED)) &&
1043
	 (specialflag & SPECIAL_LONG_LOG_FORMAT)))
1044 1045 1046 1047
    {
      long_query_count++;
      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1048
  }
1049
  thd->proc_info="cleaning up";
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1050 1051 1052 1053 1054 1055 1056
  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));
  thd->packet.shrink(net_buffer_length);	// Reclaim some memory
1057
  free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
  DBUG_RETURN(error);
}

/****************************************************************************
** mysql_execute_command
** Execute command saved in thd and current_lex->sql_command
****************************************************************************/

void
mysql_execute_command(void)
{
  int	res=0;
  THD	*thd=current_thd;
1071
  LEX	*lex= &thd->lex;
1072
  TABLE_LIST *tables=(TABLE_LIST*) lex->select_lex.table_list.first;
1073
  SELECT_LEX *select_lex = lex->select;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1074 1075
  DBUG_ENTER("mysql_execute_command");

1076 1077 1078 1079 1080 1081 1082
  /*
    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
    TODO: UPDATE this for UNION
  */
  if (table_rules_on && thd->slave_thread && tables && !tables_ok(thd,tables))
    DBUG_VOID_RETURN;
1083
  
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1084 1085 1086 1087
  switch (lex->sql_command) {
  case SQLCOM_SELECT:
  {
    select_result *result;
1088
    if (select_lex->options & SELECT_DESCRIBE)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1089
      lex->exchange=0;
1090 1091 1092
    /* Save a call, as it's very uncomon that we use unions */
    if (lex->select_lex.next && (res = create_total_list(thd,lex,&tables)))
      break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
    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
    }

1109 1110 1111
    thd->offset_limit=select_lex->offset_limit;
    thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
    if (thd->select_limit < select_lex->select_limit)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1112
      thd->select_limit= HA_POS_ERROR;		// no limit
1113
    if (thd->select_limit == HA_POS_ERROR)
1114
      select_lex->options&= ~OPTION_FOUND_ROWS;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138

    if (lex->exchange)
    {
      if (lex->exchange->dumpfile)
      {
	if (!(result=new select_dump(lex->exchange)))
	{
	  res= -1;
	  break;
	}
      }
      else
      {
	if (!(result=new select_export(lex->exchange)))
	{
	  res= -1;
	  break;
	}
      }
    }
    else if (!(result=new select_send()))
    {
      res= -1;
#ifdef DELETE_ITEMS
1139 1140
      delete select_lex->having;
      delete select_lex->where;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1141 1142 1143
#endif
      break;
    }
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1144
    else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1145
    {
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1146 1147 1148 1149 1150
      /*
	Normal select:
	Change lock if we are using SELECT HIGH PRIORITY,
	FOR UPDATE or IN SHARE MODE
      */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1151 1152
      TABLE_LIST *table;
      for (table = tables ; table ; table=table->next)
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1153
	table->lock_type= lex->lock_option;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1154 1155 1156
    }

    if (!(res=open_and_lock_tables(thd,tables)))
1157 1158 1159
      res=handle_select(thd, lex, result);
    else
      delete result;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1160 1161
    break;
  }
1162
  case SQLCOM_PURGE:
1163 1164 1165 1166 1167 1168
  {
    if (check_process_priv(thd))
      goto error;
    res = purge_master_logs(thd, lex->to_log);
    break;
  }
1169 1170 1171 1172 1173 1174 1175
  case SQLCOM_SHOW_NEW_MASTER:
  {
    if(check_access(thd, FILE_ACL, any_db))
      goto error;
    res = show_new_master(thd);
    break;
  }
1176 1177 1178 1179 1180 1181 1182
  case SQLCOM_SHOW_SLAVE_HOSTS:
  {
    if(check_access(thd, FILE_ACL, any_db))
      goto error;
    res = show_slave_hosts(thd);
    break;
  }
1183 1184 1185 1186 1187 1188 1189
  case SQLCOM_SHOW_BINLOG_EVENTS:
  {
    if(check_access(thd, FILE_ACL, any_db))
      goto error;
    res = show_binlog_events(thd);
    break;
  }
1190
  case SQLCOM_BACKUP_TABLE:
1191 1192 1193 1194 1195 1196
  {
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables) ||
	check_access(thd, FILE_ACL, any_db))
      goto error; /* purecov: inspected */
    res = mysql_backup_table(thd, tables);
1197

1198 1199
    break;
  }
1200
  case SQLCOM_RESTORE_TABLE:
1201 1202 1203 1204 1205 1206 1207 1208
  {
    if (check_db_used(thd,tables) ||
	check_table_access(thd,INSERT_ACL, tables) ||
	check_access(thd, FILE_ACL, any_db))
      goto error; /* purecov: inspected */
    res = mysql_restore_table(thd, tables);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1209
  case SQLCOM_CHANGE_MASTER:
1210 1211 1212 1213 1214 1215
  {
    if(check_access(thd, PROCESS_ACL, any_db))
      goto error;
    res = change_master(thd);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1216
  case SQLCOM_SHOW_SLAVE_STAT:
1217 1218 1219 1220 1221 1222
  {
    if (check_process_priv(thd))
      goto error;
    res = show_master_info(thd);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1223
  case SQLCOM_SHOW_MASTER_STAT:
1224 1225 1226 1227 1228 1229
  {
    if (check_process_priv(thd))
      goto error;
    res = show_binlog_info(thd);
    break;
  }
1230 1231 1232 1233 1234 1235 1236
    
  case SQLCOM_LOAD_MASTER_DATA: // sync with master
    if(check_process_priv(thd))
      goto error;
    res = load_master_data(thd);
    break;
    
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1237
  case SQLCOM_LOAD_MASTER_TABLE:
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1238

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
    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)
1251
	goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1252 1253 1254 1255 1256 1257 1258
    }
    if (strlen(tables->name) > NAME_LEN)
    {
      net_printf(&thd->net,ER_WRONG_TABLE_NAME,tables->name);
      break;
    }

monty@work.mysql.com's avatar
merge  
monty@work.mysql.com committed
1259
    if (fetch_nx_table(thd, tables->db, tables->real_name, &glob_mi, 0))
1260
      break;      // fetch_nx_table did send the error to the client
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1261 1262
    send_ok(&thd->net);
    break;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1263

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1264
  case SQLCOM_CREATE_TABLE:
1265 1266 1267 1268 1269 1270
    if (!tables->db)
      tables->db=thd->db;
    if (check_access(thd,CREATE_ACL,tables->db,&tables->grant.privilege) ||
	check_merge_table_access(thd, tables->db,
				 (TABLE_LIST *)
				 lex->create_info.merge_list.first))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
      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)
	goto error;
    }
    if (strlen(tables->name) > NAME_LEN)
    {
      net_printf(&thd->net,ER_WRONG_TABLE_NAME,tables->name);
      res=0;
      break;
    }
1288 1289 1290 1291 1292 1293 1294
    /* Fix names if symlinked tables */
    if (append_file_to_dir(&lex->create_info.data_file_name, tables->name) ||
	append_file_to_dir(&lex->create_info.index_file_name, tables->name))
    {
      res=-1;
      break;
    }
1295
    if (select_lex->item_list.elements)		// With select
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1296 1297
    {
      select_result *result;
1298 1299
      if ((res = create_total_list(thd,lex,&tables)))
	break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1300 1301 1302 1303 1304 1305 1306 1307 1308

      if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
	  check_dup(thd,tables->db,tables->real_name,tables->next))
      {
	net_printf(&thd->net,ER_INSERT_TABLE_USED,tables->real_name);
	DBUG_VOID_RETURN;
      }
      if (tables->next)
      {
1309
	TABLE_LIST *table;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1310 1311
	if (check_table_access(thd, SELECT_ACL, tables->next))
	  goto error;				// Error message is given
1312 1313
	for (table = tables->next ; table ; table=table->next)
	  table->lock_type= lex->lock_option;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1314
      }
1315 1316 1317
      thd->offset_limit=select_lex->offset_limit;
      thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
      if (thd->select_limit < select_lex->select_limit)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1318
	thd->select_limit= HA_POS_ERROR;		// No limit
1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334

      /* 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;
      }
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
    else // regular create
    {
      res = mysql_create_table(thd,tables->db ? tables->db : thd->db,
			       tables->real_name, &lex->create_info,
			       lex->create_list,
			       lex->key_list,0, 0); // do logging
      if (!res)
	send_ok(&thd->net);
    }
    break;
  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;
1352 1353 1354 1355
    if (end_active_trans(thd))
      res= -1;
    else
      res = mysql_create_index(thd, tables, lex->key_list);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1356 1357 1358 1359 1360 1361 1362 1363
    break;

  case SQLCOM_SLAVE_START:
    start_slave(thd);
    break;
  case SQLCOM_SLAVE_STOP:
    stop_slave(thd);
    break;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1364

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
  case SQLCOM_ALTER_TABLE:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
    break;
#else
    {
      uint priv=0;
      if (lex->name && strlen(lex->name) > NAME_LEN)
      {
	net_printf(&thd->net,ER_WRONG_TABLE_NAME,lex->name);
	res=0;
	break;
      }
1378 1379
      if (!tables->db)
	tables->db=thd->db;
1380 1381
      if (!select_lex->db)
	select_lex->db=tables->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1382
      if (check_access(thd,ALTER_ACL,tables->db,&tables->grant.privilege) ||
1383
	  check_access(thd,INSERT_ACL | CREATE_ACL,select_lex->db,&priv) ||
1384 1385 1386 1387
	  check_merge_table_access(thd, tables->db, 
				   (TABLE_LIST *)
				   lex->create_info.merge_list.first))
	goto error;				/* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398
      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;
1399
	  tmp_table.db=select_lex->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1400 1401 1402 1403 1404
	  tmp_table.grant.privilege=priv;
	  if (check_grant(thd,INSERT_ACL | CREATE_ACL,tables))
	    goto error;
	}
      }
1405 1406
      /* Don't yet allow changing of symlinks with ALTER TABLE */
      lex->create_info.data_file_name=lex->create_info.index_file_name=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1407
      /* ALTER TABLE ends previous transaction */
1408
      if (end_active_trans(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1409 1410
	res= -1;
      else
1411
	res= mysql_alter_table(thd, select_lex->db, lex->name,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1412 1413 1414
			       &lex->create_info,
			       tables, lex->create_list,
			       lex->key_list, lex->drop_list, lex->alter_list,
1415
                               (ORDER *) select_lex->order_list.first,
1416 1417
			       lex->drop_primary, lex->duplicates,
			       lex->alter_keys_onoff, lex->simple_alter);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1418 1419 1420
      break;
    }
#endif
1421
  case SQLCOM_RENAME_TABLE:
1422 1423 1424
  {
    TABLE_LIST *table;
    if (check_db_used(thd,tables))
1425
      goto error;
1426 1427
    for (table=tables ; table ; table=table->next->next)
    {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1428 1429
      if (check_access(thd, ALTER_ACL | DROP_ACL, table->db,
		       &table->grant.privilege) ||
1430 1431 1432 1433 1434
	  check_access(thd, INSERT_ACL | CREATE_ACL, table->next->db,
		       &table->next->grant.privilege))
	goto error;
      if (grant_option)
      {
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1435 1436 1437 1438 1439
	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) ||
1440
	    (!test_all_bits(table->next->grant.privilege,
1441
			    INSERT_ACL | CREATE_ACL) &&
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1442
	     check_grant(thd,INSERT_ACL | CREATE_ACL, &new_list)))
1443 1444 1445
	  goto error;
      }
    }
1446 1447 1448
    if (end_active_trans(thd))
      res= -1;
    else if (mysql_rename_tables(thd,tables))
1449 1450
      res= -1;
    break;
1451
  }
1452 1453 1454 1455 1456 1457
  case SQLCOM_SHOW_BINLOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
    DBUG_VOID_RETURN;
#else
    {
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1458
      if (check_process_priv(thd))
1459 1460 1461 1462 1463
	goto error;
      res = show_binlogs(thd);
      break;
    }
#endif    
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1464
  case SQLCOM_SHOW_CREATE:
1465
#ifdef DONT_ALLOW_SHOW_COMMANDS
1466
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
1467 1468
    DBUG_VOID_RETURN;
#else
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1469
    {
1470 1471 1472 1473
      if (check_db_used(thd, tables) ||
	  check_access(thd, SELECT_ACL | EXTRA_ACL, tables->db,
		       &tables->grant.privilege))
	goto error;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1474
      res = mysqld_show_create(thd, tables);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1475 1476
      break;
    }
1477
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1478
  case SQLCOM_REPAIR:
1479 1480 1481 1482 1483 1484 1485
  {
    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;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1486
  case SQLCOM_CHECK:
1487 1488 1489 1490 1491 1492 1493
  {
    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;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1494 1495
  case SQLCOM_ANALYZE:
  {
1496 1497
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1498
      goto error; /* purecov: inspected */
1499
    res = mysql_analyze_table(thd, tables, &lex->check_opt);
1500
    break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1501
  }
1502

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1503 1504 1505
  case SQLCOM_OPTIMIZE:
  {
    HA_CREATE_INFO create_info;
1506 1507
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1508
      goto error; /* purecov: inspected */
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
    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;
      res= mysql_alter_table(thd, NullS, NullS, &create_info,
			     tables, lex->create_list,
			     lex->key_list, lex->drop_list, lex->alter_list,
1523
                             (ORDER *) 0,
1524 1525 1526 1527
			     0,DUP_ERROR);
    }
    else
      res = mysql_optimize_table(thd, tables, &lex->check_opt);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1528 1529 1530 1531 1532 1533 1534
    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;
1535
    if (select_lex->item_list.elements != lex->value_list.elements)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1536 1537 1538 1539 1540
    {
      send_error(&thd->net,ER_WRONG_VALUE_COUNT);
      DBUG_VOID_RETURN;
    }
    res = mysql_update(thd,tables,
1541
		       select_lex->item_list,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1542
		       lex->value_list,
1543 1544 1545
		       select_lex->where,
                       (ORDER *) select_lex->order_list.first,
		       select_lex->select_limit,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1546 1547 1548 1549
		       lex->duplicates,
		       lex->lock_option);

#ifdef DELETE_ITEMS
1550
    delete select_lex->where;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
#endif
    break;
  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:
    if (check_access(thd,INSERT_ACL | UPDATE_ACL | DELETE_ACL,
		     tables->db,&tables->grant.privilege))
      goto error; /* purecov: inspected */
    if (grant_option && check_grant(thd,INSERT_ACL | UPDATE_ACL | DELETE_ACL,
				    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:
  {
1577 1578 1579
    if ((res = create_total_list(thd,lex,&tables)))
      break;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
1580 1581
    // Check that we have modify privileges for the first table and
    // select privileges for the rest
1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594
    {
      uint privilege= (lex->sql_command == SQLCOM_INSERT_SELECT ?
		       INSERT_ACL : INSERT_ACL | UPDATE_ACL | DELETE_ACL);
      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;
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1595 1596

    select_result *result;
1597 1598 1599
    thd->offset_limit=select_lex->offset_limit;
    thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
    if (thd->select_limit < select_lex->select_limit)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1600 1601
      thd->select_limit= HA_POS_ERROR;		// No limit

1602 1603 1604 1605
    if (check_dup(thd,tables->db,tables->real_name,tables->next))
    {
      net_printf(&thd->net,ER_INSERT_TABLE_USED,tables->real_name);
      DBUG_VOID_RETURN;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1606
    }
1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
    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,
				    lex->sql_command == SQLCOM_REPLACE_SELECT ?
				    DUP_REPLACE : DUP_IGNORE)))
	res=handle_select(thd,lex,result);
    }
    else
      res= -1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1626 1627
    break;
  }
1628
  case SQLCOM_TRUNCATE:
1629 1630
    select_lex->where=0;
    select_lex->select_limit=HA_POS_ERROR;
1631 1632
    /* Fall through */
  case SQLCOM_DELETE:
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1633 1634 1635 1636 1637 1638 1639
  {
    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);
1640 1641 1642 1643
    /* TRUNCATE ends previous transaction */
    if (lex->sql_command == SQLCOM_TRUNCATE && end_active_trans(thd))
      res= -1;
    else
1644 1645 1646 1647
      res = mysql_delete(thd,tables, select_lex->where,
			 (ORDER*) select_lex->order_list.first,
                         select_lex->select_limit, lex->lock_option,
			 select_lex->options);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1648 1649
    break;
  }
1650 1651 1652 1653 1654 1655
  case SQLCOM_MULTI_DELETE:
  {
    TABLE_LIST *aux_tables=(TABLE_LIST *)thd->lex.auxilliary_table_list.first;
    TABLE_LIST *auxi;
    uint table_count=0;
    multi_delete *result;
1656
 
1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
    /* 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)
    {		
      send_error(&thd->net,ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE);
      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)
      {
	net_printf(&thd->net,ER_NONUNIQ_TABLE,auxi->real_name);
	goto error;
      }
      auxi->lock_type=walk->lock_type=TL_WRITE;
      auxi->table= (TABLE *) walk;		// Remember corresponding table
    }
    tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
    if (add_item_to_list(new Item_null()))
    {
      res= -1;
      break;
    }
    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)
      auxi->table= ((TABLE_LIST*) auxi->table)->table;
    if ((result=new multi_delete(thd,aux_tables,lex->lock_option,
				 table_count)) && ! thd->fatal_error)
    {
      res=mysql_select(thd,tables,select_lex->item_list,
		       select_lex->where,select_lex->ftfunc_list,
		       (ORDER *)NULL,(ORDER *)NULL,(Item *)NULL,
		       (ORDER *)NULL,
		       select_lex->options | thd->options |
		       SELECT_NO_JOIN_CACHE,
		       result);
    }
    else
      res= -1;					// Error is not sent
    delete result;
    close_thread_tables(thd);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1715
  case SQLCOM_DROP_TABLE:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1716 1717 1718 1719 1720 1721 1722 1723 1724
  {
    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;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1725 1726 1727 1728 1729 1730 1731
  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;
1732 1733 1734 1735
    if (end_active_trans(thd))
      res= -1;
    else
      res = mysql_drop_index(thd, tables, lex->drop_list);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1736 1737
    break;
  case SQLCOM_SHOW_DATABASES:
1738
#if defined(DONT_ALLOW_SHOW_COMMANDS)
1739
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);   /* purecov: inspected */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1740 1741 1742
    DBUG_VOID_RETURN;
#else
    if ((specialflag & SPECIAL_SKIP_SHOW_DB) &&
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1743
	check_process_priv(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1744 1745 1746 1747 1748
      goto error;
    res= mysqld_show_dbs(thd, (lex->wild ? lex->wild->ptr() : NullS));
    break;
#endif
  case SQLCOM_SHOW_PROCESSLIST:
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1749
    if (!thd->priv_user[0] && check_process_priv(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760
      break;
    mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
			  thd->priv_user,lex->verbose);
    break;
  case SQLCOM_SHOW_STATUS:
    res= mysqld_show(thd,(lex->wild ? lex->wild->ptr() : NullS),status_vars);
    break;
  case SQLCOM_SHOW_VARIABLES:
    res= mysqld_show(thd, (lex->wild ? lex->wild->ptr() : NullS),
		     init_vars);
    break;
tim@cane.mysql.fi's avatar
tim@cane.mysql.fi committed
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
  case SQLCOM_SHOW_LOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
    DBUG_VOID_RETURN;
#else
    {
      if (grant_option && check_access(thd, FILE_ACL, any_db))
	goto error;
      res= mysqld_show_logs(thd);
      break;
    }
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1773
  case SQLCOM_SHOW_TABLES:
1774
    /* FALL THROUGH */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1775 1776 1777 1778 1779
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
    DBUG_VOID_RETURN;
#else
    {
1780
      char *db=select_lex->db ? select_lex->db : thd->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1781 1782 1783 1784 1785 1786
      if (!db)
      {
	send_error(&thd->net,ER_NO_DB_ERROR);	/* purecov: inspected */
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);				// Fix escaped '_'
1787
      if (check_db_name(db))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1788
      {
1789 1790
        net_printf(&thd->net,ER_WRONG_DB_NAME, db);
        goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1791 1792 1793 1794
      }
      if (check_access(thd,SELECT_ACL,db,&thd->col_access))
	goto error;				/* purecov: inspected */
      /* grant is checked in mysqld_show_tables */
1795
      if (select_lex->options & SELECT_DESCRIBE)
1796
        res= mysqld_extend_show_tables(thd,db,
1797
				       (lex->wild ? lex->wild->ptr() : NullS));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1798 1799 1800 1801 1802 1803
      else
	res= mysqld_show_tables(thd,db,
				(lex->wild ? lex->wild->ptr() : NullS));
      break;
    }
#endif
1804 1805 1806
  case SQLCOM_SHOW_OPEN_TABLES:
    res= mysqld_show_open_tables(thd,(lex->wild ? lex->wild->ptr() : NullS));
    break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1807 1808 1809 1810 1811 1812
  case SQLCOM_SHOW_FIELDS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
    DBUG_VOID_RETURN;
#else
    {
1813 1814
      char *db=tables->db;
      if (!*db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826
      {
	send_error(&thd->net,ER_NO_DB_ERROR);	/* purecov: inspected */
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);			// Fix escaped '_'
      remove_escape(tables->name);
      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,
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1827 1828
			      (lex->wild ? lex->wild->ptr() : NullS),
			      lex->verbose);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1829 1830 1831 1832 1833 1834 1835 1836 1837
      break;
    }
#endif
  case SQLCOM_SHOW_KEYS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
    DBUG_VOID_RETURN;
#else
    {
1838
      char *db=tables->db;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857
      if (!db)
      {
	send_error(&thd->net,ER_NO_DB_ERROR);	/* purecov: inspected */
	goto error;				/* purecov: inspected */
      }
      remove_escape(db);			// Fix escaped '_'
      remove_escape(tables->name);
      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:
1858
    mysql_change_db(thd,select_lex->db);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871
    break;
  case SQLCOM_LOAD:
  {
    uint privilege= (lex->duplicates == DUP_REPLACE ?
		     INSERT_ACL | UPDATE_ACL | DELETE_ACL : INSERT_ACL);
    if (!(lex->local_file && (thd->client_capabilities & CLIENT_LOCAL_FILES)))
    {
      if (check_access(thd,privilege | FILE_ACL,tables->db))
	goto error;
    }
    else
    {
      if (check_access(thd,privilege,tables->db,&tables->grant.privilege) ||
1872
	  grant_option && check_grant(thd,privilege,tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1873 1874 1875 1876 1877 1878 1879 1880 1881
	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:
  {
    uint org_options=thd->options;
1882
    thd->options=select_lex->options;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1883 1884
    thd->update_lock_default= ((thd->options & OPTION_LOW_PRIORITY_UPDATES) ?
			       TL_WRITE_LOW_PRIORITY : TL_WRITE);
1885
    thd->default_select_limit=select_lex->select_limit;
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
1886 1887 1888 1889 1890 1891
    thd->tx_isolation=lex->tx_isolation;
    if (thd->gemini_spin_retries != lex->gemini_spin_retries)
    {
      thd->gemini_spin_retries= lex->gemini_spin_retries;
      ha_set_spin_retries(thd->gemini_spin_retries);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1892 1893 1894 1895
    DBUG_PRINT("info",("options: %ld  limit: %ld",
		       thd->options,(long) thd->default_select_limit));

    /* Check if auto_commit mode changed */
1896
    if ((org_options ^ select_lex->options) & OPTION_NOT_AUTO_COMMIT)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1897
    {
1898
      if ((org_options & OPTION_NOT_AUTO_COMMIT))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1899 1900
      {
	/* We changed to auto_commit mode */
1901
	thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1902 1903 1904 1905 1906 1907 1908 1909
	thd->server_status|= SERVER_STATUS_AUTOCOMMIT;
	if (ha_commit(thd))
	{
	  res= -1;
	  break;
	}
      }
      else
1910 1911
      {
	thd->options&= ~(ulong) (OPTION_STATUS_NO_TRANS_UPDATE);
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
1912
	thd->server_status&= ~SERVER_STATUS_AUTOCOMMIT;
1913
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1914 1915 1916 1917 1918 1919 1920 1921 1922
    }
    send_ok(&thd->net);
    break;
  }
  case SQLCOM_UNLOCK_TABLES:
    if (thd->locked_tables)
    {
      thd->lock=thd->locked_tables;
      thd->locked_tables=0;			// Will be automaticly closed
1923
      end_active_trans(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1924 1925
    }
    if (thd->global_read_lock)
1926
      unlock_global_read_lock(thd);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1927 1928 1929 1930 1931 1932 1933 1934 1935
    send_ok(&thd->net);
    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);
    }
1936
    if (check_db_used(thd,tables) || end_active_trans(thd))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1937
      goto error;
1938 1939
    if (grant_option && check_grant(thd,SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL,tables))
      goto error;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
    thd->in_lock_tables=1;
    if (!(res=open_and_lock_tables(thd,tables)))
    {
      thd->locked_tables=thd->lock;
      thd->lock=0;
      send_ok(&thd->net);
    }
    thd->in_lock_tables=0;
    break;
  case SQLCOM_CREATE_DB:
1950 1951
  {
    if (!stripp_sp(lex->name) || check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1952
    {
1953
      net_printf(&thd->net,ER_WRONG_DB_NAME, lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1954 1955
      break;
    }
1956 1957 1958 1959 1960
    if (check_access(thd,CREATE_ACL,lex->name,0,1))
      break;
    mysql_create_db(thd,lex->name,lex->create_info.options);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1961
  case SQLCOM_DROP_DB:
1962 1963
  {
    if (!stripp_sp(lex->name) || check_db_name(lex->name))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1964
    {
1965
      net_printf(&thd->net,ER_WRONG_DB_NAME, lex->name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1966 1967
      break;
    }
1968 1969 1970 1971 1972 1973
    if (check_access(thd,DROP_ACL,lex->name,0,1) ||
	end_active_trans(thd))
      break;
    mysql_rm_db(thd,lex->name,lex->drop_if_exists);
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993
  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)))
      send_ok(&thd->net);
#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)))
      send_ok(&thd->net);
#else
    res= -1;
#endif
    break;
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065
  case SQLCOM_REVOKE:
  case SQLCOM_GRANT:
  {
    if (tables && !tables->db)
      tables->db=thd->db;
    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;

    /* 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 */

    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 &&
	     my_strcasecmp(user->host.str, thd->host_or_ip)))
	{
	  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;
      res = mysql_table_grant(thd,tables,lex->users_list, lex->columns,
			      lex->grant, lex->sql_command == SQLCOM_REVOKE);
      if(!res)
      {
	mysql_update_log.write(thd, thd->query,thd->query_length);
	if (mysql_bin_log.is_open())
	{
	  Query_log_event qinfo(thd, thd->query);
	  mysql_bin_log.write(&qinfo);
	}
      }
    }
    else
    {
      if (lex->columns.elements)
      {
	net_printf(&thd->net,ER_ILLEGAL_GRANT_FOR_TABLE);
	res=1;
      }
      else
	res = mysql_grant(thd, select_lex->db, lex->users_list, lex->grant,
			  lex->sql_command == SQLCOM_REVOKE);
      if (!res)
      {
	mysql_update_log.write(thd, thd->query,thd->query_length);
	if (mysql_bin_log.is_open())
	{
	  Query_log_event qinfo(thd, thd->query);
	  mysql_bin_log.write(&qinfo);
	}
      }
    }
    break;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2066
  case SQLCOM_FLUSH:
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2067
  case SQLCOM_RESET:
2068
    if (check_access(thd,RELOAD_ACL,any_db) || check_db_used(thd, tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2069
      goto error;
2070
    if (reload_acl_and_cache(thd, lex->type, tables))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2071 2072 2073 2074 2075 2076 2077 2078 2079
      send_error(&thd->net,0);
    else
      send_ok(&thd->net);
    break;
  case SQLCOM_KILL:
    kill_one_thread(thd,lex->thread_id);
    break;
  case SQLCOM_SHOW_GRANTS:
    res=0;
2080 2081
    if ((thd->priv_user &&
	 !strcmp(thd->priv_user,lex->grant_user->user.str)) ||
2082
	!check_access(thd, SELECT_ACL, "mysql",0,1))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2083 2084 2085 2086
    {
      res = mysql_show_grants(thd,lex->grant_user);
    }
    break;
2087
  case SQLCOM_HA_OPEN:
2088 2089
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables))
2090 2091 2092 2093 2094 2095 2096 2097 2098
      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:
2099 2100
    if (check_db_used(thd,tables) ||
	check_table_access(thd,SELECT_ACL, tables))
2101
      goto error;
serg@serg.mysql.com's avatar
serg@serg.mysql.com committed
2102
    res = mysql_ha_read(thd, tables, lex->ha_read_mode, lex->backup_dir,
2103 2104
			lex->insert_list, lex->ha_rkey_mode, select_lex->where,
			select_lex->select_limit, select_lex->offset_limit);
2105 2106
    break;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2107
  case SQLCOM_BEGIN:
2108 2109 2110 2111 2112 2113
    if (end_active_trans(thd))
    {
      res= -1;
    }
    else
    {
2114
      thd->options= ((thd->options & (ulong) ~(OPTION_STATUS_NO_TRANS_UPDATE)) |
2115 2116 2117 2118
		     OPTION_BEGIN);
      thd->server_status|= SERVER_STATUS_IN_TRANS;
      send_ok(&thd->net);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2119 2120
    break;
  case SQLCOM_COMMIT:
2121 2122 2123 2124 2125
    /*
      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...)
    */
2126
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2127 2128 2129 2130 2131 2132 2133 2134 2135
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
    if (!ha_commit(thd))
      send_ok(&thd->net);
    else
      res= -1;
    break;
  case SQLCOM_ROLLBACK:
    thd->server_status&= ~SERVER_STATUS_IN_TRANS;
    if (!ha_rollback(thd))
2136 2137 2138 2139 2140 2141
    {
      if (thd->options & OPTION_STATUS_NO_TRANS_UPDATE)
	send_warning(&thd->net,ER_WARNING_NOT_COMPLETE_ROLLBACK,0);
      else
	send_ok(&thd->net);
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2142 2143
    else
      res= -1;
2144
    thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162
    break;
  default:					/* Impossible */
    send_ok(&thd->net);
    break;
  }
  thd->proc_info="query end";			// QQ
  if (res < 0)
    send_error(&thd->net,thd->killed ? ER_SERVER_SHUTDOWN : 0);

error:
  DBUG_VOID_RETURN;
}


/****************************************************************************
** 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.
2163 2164 2165 2166
** 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.
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2167 2168 2169 2170
****************************************************************************/

bool
check_access(THD *thd,uint want_access,const char *db, uint *save_priv,
2171
	     bool dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2172 2173 2174 2175 2176 2177 2178
{
  uint db_access,dummy;
  if (save_priv)
    *save_priv=0;
  else
    save_priv= &dummy;

2179
  if (!db[0] && !thd->db && !dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190
  {
    send_error(&thd->net,ER_NO_DB_ERROR);	/* purecov: tested */
    return TRUE;				/* purecov: tested */
  }

  if ((thd->master_access & want_access) == want_access)
  {
    *save_priv=thd->master_access;
    return FALSE;
  }
  if ((want_access & ~thd->master_access) & ~(DB_ACLS | EXTRA_ACL) ||
2191
      ! db && dont_check_global_grants)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2192 2193 2194
  {						// We can never grant this
    net_printf(&thd->net,ER_ACCESS_DENIED_ERROR,
	       thd->priv_user,
2195
	       thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2196 2197 2198 2199 2200 2201
	       thd->password ? ER(ER_YES) : ER(ER_NO));/* purecov: tested */
    return TRUE;				/* purecov: tested */
  }

  if (db == any_db)
    return FALSE;				// Allow select on anything
2202
  
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2203 2204 2205 2206 2207 2208 2209
  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;
  want_access &= ~EXTRA_ACL;			// Remove SHOW attribute
  db_access= ((*save_priv=(db_access | thd->master_access)) & want_access);
2210 2211

  /* grant_option is set if there exists a single table or column grant */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2212
  if (db_access == want_access ||
2213 2214
      ((grant_option && !dont_check_global_grants) &&
       !(want_access & ~TABLE_ACLS)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2215 2216 2217
    return FALSE;				/* Ok */
  net_printf(&thd->net,ER_DBACCESS_DENIED_ERROR,
	     thd->priv_user,
2218
	     thd->host_or_ip,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2219 2220 2221 2222 2223
	     db ? db : thd->db ? thd->db : "unknown"); /* purecov: tested */
  return TRUE;					/* purecov: tested */
}


monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2224 2225 2226 2227 2228 2229
bool check_process_priv(THD *thd)
{
  return (check_access(thd ? thd : current_thd,PROCESS_ACL,any_db));
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
2230 2231 2232 2233 2234
/*
** Check the privilege for all used tables.  Table privileges are cached
** in the table list for GRANT checking
*/

2235
bool
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2236 2237 2238 2239 2240 2241
check_table_access(THD *thd,uint want_access,TABLE_LIST *tables)
{
  uint found=0,found_access=0;
  TABLE_LIST *org_tables=tables;
  for (; tables ; tables=tables->next)
  {
2242 2243
    if ((thd->master_access & want_access) == (want_access & ~EXTRA_ACL) &&
	thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2244
      tables->grant.privilege= want_access;
2245
    else if (tables->db && tables->db == thd->db)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2246 2247 2248 2249 2250 2251 2252 2253
    {
      if (found && !grant_option)		// db already checked
	tables->grant.privilege=found_access;
      else
      {
	if (check_access(thd,want_access,tables->db,&tables->grant.privilege))
	  return TRUE;				// Access denied
	found_access=tables->grant.privilege;
2254
	found=1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2255 2256 2257 2258 2259 2260
      }
    }
    else if (check_access(thd,want_access,tables->db,&tables->grant.privilege))
      return TRUE;				// Access denied
  }
  if (grant_option)
2261 2262
    return check_grant(thd,want_access & ~EXTRA_ACL,org_tables,
		       test(want_access & EXTRA_ACL));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2263 2264 2265 2266
  return FALSE;
}


2267
static bool check_db_used(THD *thd,TABLE_LIST *tables)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283
{
  for (; tables ; tables=tables->next)
  {
    if (!tables->db)
    {
      if (!(tables->db=thd->db))
      {
	send_error(&thd->net,ER_NO_DB_ERROR);	/* purecov: tested */
	return TRUE;				/* purecov: tested */
      }
    }
  }
  return FALSE;
}


2284 2285
static bool check_merge_table_access(THD *thd, char *db,
				     TABLE_LIST *table_list)
2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300
{
  int error=0;
  if (table_list)
  {
    /* Force all tables to use the current database */
    TABLE_LIST *tmp;
    for (tmp=table_list; tmp ; tmp=tmp->next)
      tmp->db=db;
    error=check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
			     table_list);
  }
  return error;
}


bk@work.mysql.com's avatar
bk@work.mysql.com committed
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364
/****************************************************************************
	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;
}


/****************************************************************************
	Initialize global thd variables neaded for query
****************************************************************************/

static void
mysql_init_query(THD *thd)
{
  DBUG_ENTER("mysql_init_query");
2365
  thd->lex.select_lex.item_list.empty();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2366
  thd->lex.value_list.empty();
2367
  thd->lex.select_lex.table_list.elements=0;
Sinisa@sinisa.nasamreza.org's avatar
Sinisa@sinisa.nasamreza.org committed
2368
  thd->free_list=0;  thd->lex.union_option=0;
2369 2370 2371
  thd->lex.select = &thd->lex.select_lex;
  thd->lex.select_lex.table_list.first=0;
  thd->lex.select_lex.table_list.next= (byte**) &thd->lex.select_lex.table_list.first;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2372 2373
  thd->fatal_error=0;				// Safety
  thd->last_insert_id_used=thd->query_start_used=thd->insert_id_used=0;
2374
  thd->sent_row_count=thd->examined_row_count=0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2375 2376 2377
  DBUG_VOID_RETURN;
}

2378 2379 2380
void
mysql_init_select(LEX *lex)
{
2381 2382 2383
  SELECT_LEX *select_lex = lex->select;
  select_lex->where=select_lex->having=0;
  select_lex->select_limit=current_thd->default_select_limit;
2384
  select_lex->offset_limit=0;
2385
  select_lex->options=0; select_lex->linkage=UNSPECIFIED_TYPE;
2386
  lex->exchange = 0;
2387
  lex->proc_list.first=0;
2388 2389 2390 2391 2392 2393
  select_lex->order_list.elements=select_lex->group_list.elements=0;
  select_lex->order_list.first=0;
  select_lex->order_list.next= (byte**) &select_lex->order_list.first;
  select_lex->group_list.first=0;
  select_lex->group_list.next= (byte**) &select_lex->group_list.first;
  select_lex->next = (SELECT_LEX *)NULL; 
2394 2395
}

2396 2397 2398
void
mysql_new_select(LEX *lex)
{
2399
  SELECT_LEX *select_lex = (SELECT_LEX *) lex->thd->calloc(sizeof(SELECT_LEX));
2400
  lex->select->next=select_lex; 
2401
  lex->select=select_lex;
2402 2403 2404 2405
  select_lex->table_list.next= (byte**) &select_lex->table_list.first;
  select_lex->item_list.empty(); select_lex->when_list.empty(); 
  select_lex->expr_list.empty();  select_lex->interval_list.empty(); 
  select_lex->use_index.empty(); select_lex->ftfunc_list.empty();
2406
}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630

void
mysql_parse(THD *thd,char *inBuf,uint length)
{
  DBUG_ENTER("mysql_parse");

  mysql_init_query(thd);
  thd->query_length = length;
  LEX *lex=lex_start(thd, (uchar*) inBuf, length);
  if (!yyparse() && ! thd->fatal_error)
    mysql_execute_command();
  thd->proc_info="freeing items";
  free_items(thd);  /* Free strings used by items */
  lex_end(lex);
  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,
		       uint type_modifier, Item *default_value,char *change,
		       TYPELIB *interval)
{
  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)
  {
    net_printf(&thd->net, ER_TOO_LONG_IDENT, field_name); /* purecov: inspected */
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  if (type_modifier & PRI_KEY_FLAG)
  {
    lex->col_list.push_back(new key_part_spec(field_name,0));
    lex->key_list.push_back(new Key(Key::PRIMARY,NullS,
				    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));
    lex->key_list.push_back(new Key(Key::UNIQUE,NullS,
				    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)
    {
      net_printf(&thd->net,ER_INVALID_DEFAULT,field_name);
      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;
  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 &&
      new_field->length < new_field->decimals+2 &&
      new_field->decimals != NOT_FIXED_DEC)
    new_field->length=new_field->decimals+2; /* purecov: inspected */

  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:
    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())
      {
	net_printf(&thd->net,ER_BLOB_CANT_HAVE_DEFAULT,field_name); /* purecov: inspected */
	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)
      {
	net_printf(&thd->net,ER_WRONG_FIELD_SPEC,field_name);
	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)
      {
	net_printf(&thd->net,ER_TOO_BIG_SET,field_name); /* purecov: inspected */
	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++)
2631
	new_field->length+=(uint) strlen(*pos)+1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651
      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)
	{
	  net_printf(&thd->net,ER_INVALID_DEFAULT,field_name);
	  DBUG_RETURN(1);
	}
      }
    }
    break;
  case FIELD_TYPE_ENUM:
    {
      new_field->interval=interval;
      new_field->pack_length=interval->count < 256 ? 1 : 2; // Should be safe
2652
      new_field->length=(uint) strlen(interval->type_names[0]);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2653 2654
      for (const char **pos=interval->type_names+1; *pos ; pos++)
      {
2655
	uint length=(uint) strlen(*pos);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725
	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()))
	{
	  net_printf(&thd->net,ER_INVALID_DEFAULT,field_name);
	  DBUG_RETURN(1);
	}
      }
      break;
    }
  }

  if (new_field->length >= MAX_FIELD_WIDTH ||
      (!new_field->length && !(new_field->flags & BLOB_FLAG) &&
       type != FIELD_TYPE_STRING))
  {
    net_printf(&thd->net,ER_TOO_BIG_FIELDLENGTH,field_name,
	       MAX_FIELD_WIDTH-1);		/* purecov: inspected */
    DBUG_RETURN(1);				/* purecov: inspected */
  }
  type_modifier&= AUTO_INCREMENT_FLAG;
  if ((~allowed_type_modifier) & type_modifier)
  {
    net_printf(&thd->net,ER_WRONG_FIELD_SPEC,field_name);
    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)
{
2726 2727
  if (!*name)					// For empty DB names
    return;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2728 2729
  char *to;
#ifdef USE_MB
2730
  char *strend=name+(uint) strlen(name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776
#endif
  for (to=name; *name ; name++)
  {
#ifdef USE_MB
    int l;
/*    if ((l = ismbchar(name, name+MBMAXLEN))) { Wei He: I think it's wrong */
    if (use_mb(default_charset_info) &&
        (l = my_ismbchar(default_charset_info, name, strend)))
    {
	while (l--)
	    *to++ = *name++;
	name--;
	continue;
    }
#endif
    if (*name == '\\' && name[1])
      name++;					// Skipp '\\'
    *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);
}


TABLE_LIST *add_table_to_list(Table_ident *table, LEX_STRING *alias,
2777
			      bool updating,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2778 2779
			      thr_lock_type flags,
			      List<String> *use_index,
2780 2781
			      List<String> *ignore_index
			      )
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791
{
  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 ||
2792 2793
      check_table_name(table->table.str,table->table.length) ||
      table->db.str && check_db_name(table->db.str))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2794 2795 2796 2797 2798 2799 2800
  {
    net_printf(&thd->net,ER_WRONG_TABLE_NAME,table->table.str);
    DBUG_RETURN(0);
  }

#ifdef FN_LOWER_CASE
  if (!alias)					/* Alias is case sensitive */
2801
    if (!(alias_str=thd->memdup(alias_str,table->table.length+1)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2802 2803 2804 2805
      DBUG_RETURN(0);
  if (lower_case_table_names)
    casedn_str(table->table.str);
#endif
2806
  if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2807
    DBUG_RETURN(0);				/* purecov: inspected */
2808
  ptr->db= table->db.str ? table->db.str : (thd->db ? thd->db : (char*) "");
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2809 2810 2811
  ptr->real_name=table->table.str;
  ptr->name=alias_str;
  ptr->lock_type=flags;
2812
  ptr->updating=updating;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2813
  if (use_index)
2814
    ptr->use_index=(List<String> *) thd->memdup((gptr) use_index,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2815 2816
					       sizeof(*use_index));
  if (ignore_index)
2817 2818
    ptr->ignore_index=(List<String> *) thd->memdup((gptr) ignore_index,
						   sizeof(*ignore_index));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2819 2820

  /* check that used name is unique */
2821
  if (flags != TL_IGNORE)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2822
  {
2823
    for (TABLE_LIST *tables=(TABLE_LIST*) thd->lex.select->table_list.first ; tables ;
2824
	 tables=tables->next)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2825
    {
2826
      if (!strcmp(alias_str,tables->name) && !strcmp(ptr->db, tables->db))
2827 2828 2829 2830
      {
	net_printf(&thd->net,ER_NONUNIQ_TABLE,alias_str); /* purecov: tested */
	DBUG_RETURN(0);				/* purecov: tested */
      }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2831 2832
    }
  }
2833
  link_in_list(&thd->lex.select->table_list,(byte*) ptr,(byte**) &ptr->next);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2834 2835 2836
  DBUG_RETURN(ptr);
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2837 2838 2839 2840 2841 2842 2843

/*
** This is used for UNION to create a new table list of all used tables
** The table_list->table entry in all used tables are set to point
** to the entries in this list.
*/

2844
static int create_total_list(THD *thd, LEX *lex, TABLE_LIST **result)
2845
{
2846 2847 2848 2849 2850 2851 2852
  /* Handle the case when we are not using union */
  if (!lex->select_lex.next)
  {
    *result= (TABLE_LIST*) lex->select_lex.table_list.first;
    return 0;
  }

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2853 2854 2855 2856
  SELECT_LEX *sl;
  TABLE_LIST **new_table_list= result, *aux;
  
  *new_table_list=0;				// end result list
2857
  for (sl= &lex->select_lex; sl; sl=sl->next)
2858
  {
2859
    if (sl->order_list.first && sl->next)
2860
    {
2861
      my_error(ER_WRONG_USAGE,MYF(0),"UNION","ORDER BY");
2862 2863
      return -1;
    }
2864
    if ((aux= (TABLE_LIST*) sl->table_list.first))
2865
    {
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2866 2867
      TABLE_LIST *next;
      for (; aux; aux=next)
2868
      {
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2869 2870 2871 2872
	TABLE_LIST *cursor;
	next= aux->next;
	for (cursor= *result; cursor; cursor=cursor->next)
	  if (!strcmp(cursor->db,aux->db) &&
2873 2874
	      !strcmp(cursor->real_name,aux->real_name) &&
	      !strcmp(cursor->name, aux->name))
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2875 2876 2877 2878 2879 2880 2881
	    break;
	if (!cursor)
	{
	  /* Add not used table to the total table list */
	  aux->lock_type= lex->lock_option;
	  if (!(cursor = (TABLE_LIST *) thd->memdup((byte*) aux,
						    sizeof(*aux))))
2882
	    return -1;
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2883 2884 2885 2886 2887
	  *new_table_list= cursor;
	  new_table_list= &cursor->next;
	  *new_table_list=0;				// end result list
	}
	aux->table=(TABLE *) cursor;
2888 2889 2890
      }
    }
  }
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2891
  return 0;
2892 2893
}

monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
2894

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2895 2896
void add_join_on(TABLE_LIST *b,Item *expr)
{
2897 2898 2899 2900 2901 2902 2903
  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);
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917
}


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

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

static bool check_dup(THD *thd,const char *db,const char *name,
		      TABLE_LIST *tables)
{
  for (; tables ; tables=tables->next)
2918
    if (!strcmp(name,tables->real_name) && !strcmp(db,tables->db))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2919 2920 2921 2922
      return 1;
  return 0;
}

2923
bool reload_acl_and_cache(THD *thd, uint options, TABLE_LIST *tables)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2924 2925 2926 2927
{
  bool result=0;

  select_errors=0;				/* Write if more errors */
2928
  // mysql_log.flush();				// Flush log
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
  if (options & REFRESH_GRANT)
  {
    acl_reload();
    grant_reload();
  }
  if (options & REFRESH_LOG)
  {
    mysql_log.new_file();
    mysql_update_log.new_file();
    mysql_bin_log.new_file();
    mysql_slow_log.new_file();
    if (ha_flush_logs())
      result=1;
  }
  if (options & (REFRESH_TABLES | REFRESH_READ_LOCK))
  {
2945
    if ((options & REFRESH_READ_LOCK) && thd)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2946
    {
2947 2948
      if (lock_global_read_lock(thd))
	return 1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2949
    }
2950
    result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1, tables);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961
  }
  if (options & REFRESH_HOSTS)
    hostname_cache_refresh();
  if (options & REFRESH_STATUS)
    refresh_status();
  if (options & REFRESH_THREADS)
    flush_thread_cache();
  if (options & REFRESH_MASTER)
    reset_master();
  if (options & REFRESH_SLAVE)
    reset_slave();
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
2962

bk@work.mysql.com's avatar
bk@work.mysql.com committed
2963 2964 2965 2966
  return result;
}


2967
void kill_one_thread(THD *thd, ulong id)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979
{
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
  I_List_iterator<THD> it(threads);
  THD *tmp;
  uint error=ER_NO_SUCH_THREAD;
  while ((tmp=it++))
  {
    if (tmp->thread_id == id)
    {
      if ((thd->master_access & PROCESS_ACL) ||
	  !strcmp(thd->user,tmp->user))
      {
2980
	tmp->prepare_to_die();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008
	error=0;
      }
      else
	error=ER_KILL_DENIED_ERROR;
      break;					// Found thread
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
  if (!error)
    send_ok(&thd->net);
  else
    net_printf(&thd->net,error,id);
}

/* 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);
}
3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028


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

static bool append_file_to_dir(char **filename_ptr, char *table_name)
{
  char buff[FN_REFLEN],*ptr;
  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);
  convert_dirname(buff);
3029
  if (!(ptr=sql_alloc(strlen(buff)+strlen(table_name)+1)))
3030 3031
    return 1;					// End of memory
  *filename_ptr=ptr;
3032
  strxmov(ptr,buff,table_name,NullS);
3033 3034
  return 0;
}