Редакция 2 | Содержимое файла | Сравнить с предыдущей | Последнее изменение | Открыть журнал | RSS
Редакция | Автор | № строки | Строка |
---|---|---|---|
2 | alex-w | 1 | <?php |
2 | |||
3 | /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
||
4 | |||
5 | /** |
||
6 | * The PEAR DB driver for PHP's mysql extension |
||
7 | * for interacting with MySQL databases |
||
8 | * |
||
9 | * PHP versions 4 and 5 |
||
10 | * |
||
11 | * LICENSE: This source file is subject to version 3.0 of the PHP license |
||
12 | * that is available through the world-wide-web at the following URI: |
||
13 | * http://www.php.net/license/3_0.txt. If you did not receive a copy of |
||
14 | * the PHP License and are unable to obtain it through the web, please |
||
15 | * send a note to license@php.net so we can mail you a copy immediately. |
||
16 | * |
||
17 | * @category Database |
||
18 | * @package DB |
||
19 | * @author Stig Bakken <ssb@php.net> |
||
20 | * @author Daniel Convissor <danielc@php.net> |
||
21 | * @copyright 1997-2007 The PHP Group |
||
22 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
||
23 | * @version CVS: $Id: mysql.php,v 1.126 2007/09/21 13:32:52 aharvey Exp $ |
||
24 | * @link http://pear.php.net/package/DB |
||
25 | */ |
||
26 | |||
27 | /** |
||
28 | * Obtain the DB_common class so it can be extended from |
||
29 | */ |
||
30 | require_once 'DB/common.php'; |
||
31 | |||
32 | /** |
||
33 | * The methods PEAR DB uses to interact with PHP's mysql extension |
||
34 | * for interacting with MySQL databases |
||
35 | * |
||
36 | * These methods overload the ones declared in DB_common. |
||
37 | * |
||
38 | * @category Database |
||
39 | * @package DB |
||
40 | * @author Stig Bakken <ssb@php.net> |
||
41 | * @author Daniel Convissor <danielc@php.net> |
||
42 | * @copyright 1997-2007 The PHP Group |
||
43 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
||
44 | * @version Release: 1.7.13 |
||
45 | * @link http://pear.php.net/package/DB |
||
46 | */ |
||
47 | class DB_mysql extends DB_common |
||
48 | { |
||
49 | // {{{ properties |
||
50 | |||
51 | /** |
||
52 | * The DB driver type (mysql, oci8, odbc, etc.) |
||
53 | * @var string |
||
54 | */ |
||
55 | var $phptype = 'mysql'; |
||
56 | |||
57 | /** |
||
58 | * The database syntax variant to be used (db2, access, etc.), if any |
||
59 | * @var string |
||
60 | */ |
||
61 | var $dbsyntax = 'mysql'; |
||
62 | |||
63 | /** |
||
64 | * The capabilities of this DB implementation |
||
65 | * |
||
66 | * The 'new_link' element contains the PHP version that first provided |
||
67 | * new_link support for this DBMS. Contains false if it's unsupported. |
||
68 | * |
||
69 | * Meaning of the 'limit' element: |
||
70 | * + 'emulate' = emulate with fetch row by number |
||
71 | * + 'alter' = alter the query |
||
72 | * + false = skip rows |
||
73 | * |
||
74 | * @var array |
||
75 | */ |
||
76 | var $features = array( |
||
77 | 'limit' => 'alter', |
||
78 | 'new_link' => '4.2.0', |
||
79 | 'numrows' => true, |
||
80 | 'pconnect' => true, |
||
81 | 'prepare' => false, |
||
82 | 'ssl' => false, |
||
83 | 'transactions' => true, |
||
84 | ); |
||
85 | |||
86 | /** |
||
87 | * A mapping of native error codes to DB error codes |
||
88 | * @var array |
||
89 | */ |
||
90 | var $errorcode_map = array( |
||
91 | 1004 => DB_ERROR_CANNOT_CREATE, |
||
92 | 1005 => DB_ERROR_CANNOT_CREATE, |
||
93 | 1006 => DB_ERROR_CANNOT_CREATE, |
||
94 | 1007 => DB_ERROR_ALREADY_EXISTS, |
||
95 | 1008 => DB_ERROR_CANNOT_DROP, |
||
96 | 1022 => DB_ERROR_ALREADY_EXISTS, |
||
97 | 1044 => DB_ERROR_ACCESS_VIOLATION, |
||
98 | 1046 => DB_ERROR_NODBSELECTED, |
||
99 | 1048 => DB_ERROR_CONSTRAINT, |
||
100 | 1049 => DB_ERROR_NOSUCHDB, |
||
101 | 1050 => DB_ERROR_ALREADY_EXISTS, |
||
102 | 1051 => DB_ERROR_NOSUCHTABLE, |
||
103 | 1054 => DB_ERROR_NOSUCHFIELD, |
||
104 | 1061 => DB_ERROR_ALREADY_EXISTS, |
||
105 | 1062 => DB_ERROR_ALREADY_EXISTS, |
||
106 | 1064 => DB_ERROR_SYNTAX, |
||
107 | 1091 => DB_ERROR_NOT_FOUND, |
||
108 | 1100 => DB_ERROR_NOT_LOCKED, |
||
109 | 1136 => DB_ERROR_VALUE_COUNT_ON_ROW, |
||
110 | 1142 => DB_ERROR_ACCESS_VIOLATION, |
||
111 | 1146 => DB_ERROR_NOSUCHTABLE, |
||
112 | 1216 => DB_ERROR_CONSTRAINT, |
||
113 | 1217 => DB_ERROR_CONSTRAINT, |
||
114 | 1356 => DB_ERROR_DIVZERO, |
||
115 | 1451 => DB_ERROR_CONSTRAINT, |
||
116 | 1452 => DB_ERROR_CONSTRAINT, |
||
117 | ); |
||
118 | |||
119 | /** |
||
120 | * The raw database connection created by PHP |
||
121 | * @var resource |
||
122 | */ |
||
123 | var $connection; |
||
124 | |||
125 | /** |
||
126 | * The DSN information for connecting to a database |
||
127 | * @var array |
||
128 | */ |
||
129 | var $dsn = array(); |
||
130 | |||
131 | |||
132 | /** |
||
133 | * Should data manipulation queries be committed automatically? |
||
134 | * @var bool |
||
135 | * @access private |
||
136 | */ |
||
137 | var $autocommit = true; |
||
138 | |||
139 | /** |
||
140 | * The quantity of transactions begun |
||
141 | * |
||
142 | * {@internal While this is private, it can't actually be designated |
||
143 | * private in PHP 5 because it is directly accessed in the test suite.}} |
||
144 | * |
||
145 | * @var integer |
||
146 | * @access private |
||
147 | */ |
||
148 | var $transaction_opcount = 0; |
||
149 | |||
150 | /** |
||
151 | * The database specified in the DSN |
||
152 | * |
||
153 | * It's a fix to allow calls to different databases in the same script. |
||
154 | * |
||
155 | * @var string |
||
156 | * @access private |
||
157 | */ |
||
158 | var $_db = ''; |
||
159 | |||
160 | |||
161 | // }}} |
||
162 | // {{{ constructor |
||
163 | |||
164 | /** |
||
165 | * This constructor calls <kbd>$this->DB_common()</kbd> |
||
166 | * |
||
167 | * @return void |
||
168 | */ |
||
169 | function DB_mysql() |
||
170 | { |
||
171 | $this->DB_common(); |
||
172 | } |
||
173 | |||
174 | // }}} |
||
175 | // {{{ connect() |
||
176 | |||
177 | /** |
||
178 | * Connect to the database server, log in and open the database |
||
179 | * |
||
180 | * Don't call this method directly. Use DB::connect() instead. |
||
181 | * |
||
182 | * PEAR DB's mysql driver supports the following extra DSN options: |
||
183 | * + new_link If set to true, causes subsequent calls to connect() |
||
184 | * to return a new connection link instead of the |
||
185 | * existing one. WARNING: this is not portable to |
||
186 | * other DBMS's. Available since PEAR DB 1.7.0. |
||
187 | * + client_flags Any combination of MYSQL_CLIENT_* constants. |
||
188 | * Only used if PHP is at version 4.3.0 or greater. |
||
189 | * Available since PEAR DB 1.7.0. |
||
190 | * |
||
191 | * @param array $dsn the data source name |
||
192 | * @param bool $persistent should the connection be persistent? |
||
193 | * |
||
194 | * @return int DB_OK on success. A DB_Error object on failure. |
||
195 | */ |
||
196 | function connect($dsn, $persistent = false) |
||
197 | { |
||
198 | if (!PEAR::loadExtension('mysql')) { |
||
199 | return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
||
200 | } |
||
201 | |||
202 | $this->dsn = $dsn; |
||
203 | if ($dsn['dbsyntax']) { |
||
204 | $this->dbsyntax = $dsn['dbsyntax']; |
||
205 | } |
||
206 | |||
207 | $params = array(); |
||
208 | if ($dsn['protocol'] && $dsn['protocol'] == 'unix') { |
||
209 | $params[0] = ':' . $dsn['socket']; |
||
210 | } else { |
||
211 | $params[0] = $dsn['hostspec'] ? $dsn['hostspec'] |
||
212 | : 'localhost'; |
||
213 | if ($dsn['port']) { |
||
214 | $params[0] .= ':' . $dsn['port']; |
||
215 | } |
||
216 | } |
||
217 | $params[] = $dsn['username'] ? $dsn['username'] : null; |
||
218 | $params[] = $dsn['password'] ? $dsn['password'] : null; |
||
219 | |||
220 | if (!$persistent) { |
||
221 | if (isset($dsn['new_link']) |
||
222 | && ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)) |
||
223 | { |
||
224 | $params[] = true; |
||
225 | } else { |
||
226 | $params[] = false; |
||
227 | } |
||
228 | } |
||
229 | if (version_compare(phpversion(), '4.3.0', '>=')) { |
||
230 | $params[] = isset($dsn['client_flags']) |
||
231 | ? $dsn['client_flags'] : null; |
||
232 | } |
||
233 | |||
234 | $connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect'; |
||
235 | |||
236 | $ini = ini_get('track_errors'); |
||
237 | $php_errormsg = ''; |
||
238 | if ($ini) { |
||
239 | $this->connection = @call_user_func_array($connect_function, |
||
240 | $params); |
||
241 | } else { |
||
242 | @ini_set('track_errors', 1); |
||
243 | $this->connection = @call_user_func_array($connect_function, |
||
244 | $params); |
||
245 | @ini_set('track_errors', $ini); |
||
246 | } |
||
247 | |||
248 | if (!$this->connection) { |
||
249 | if (($err = @mysql_error()) != '') { |
||
250 | return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
||
251 | null, null, null, |
||
252 | $err); |
||
253 | } else { |
||
254 | return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
||
255 | null, null, null, |
||
256 | $php_errormsg); |
||
257 | } |
||
258 | } |
||
259 | |||
260 | if ($dsn['database']) { |
||
261 | if (!@mysql_select_db($dsn['database'], $this->connection)) { |
||
262 | return $this->mysqlRaiseError(); |
||
263 | } |
||
264 | $this->_db = $dsn['database']; |
||
265 | } |
||
266 | |||
267 | return DB_OK; |
||
268 | } |
||
269 | |||
270 | // }}} |
||
271 | // {{{ disconnect() |
||
272 | |||
273 | /** |
||
274 | * Disconnects from the database server |
||
275 | * |
||
276 | * @return bool TRUE on success, FALSE on failure |
||
277 | */ |
||
278 | function disconnect() |
||
279 | { |
||
280 | $ret = @mysql_close($this->connection); |
||
281 | $this->connection = null; |
||
282 | return $ret; |
||
283 | } |
||
284 | |||
285 | // }}} |
||
286 | // {{{ simpleQuery() |
||
287 | |||
288 | /** |
||
289 | * Sends a query to the database server |
||
290 | * |
||
291 | * Generally uses mysql_query(). If you want to use |
||
292 | * mysql_unbuffered_query() set the "result_buffering" option to 0 using |
||
293 | * setOptions(). This option was added in Release 1.7.0. |
||
294 | * |
||
295 | * @param string the SQL query string |
||
296 | * |
||
297 | * @return mixed + a PHP result resrouce for successful SELECT queries |
||
298 | * + the DB_OK constant for other successful queries |
||
299 | * + a DB_Error object on failure |
||
300 | */ |
||
301 | function simpleQuery($query) |
||
302 | { |
||
303 | $ismanip = $this->_checkManip($query); |
||
304 | $this->last_query = $query; |
||
305 | $query = $this->modifyQuery($query); |
||
306 | if ($this->_db) { |
||
307 | if (!@mysql_select_db($this->_db, $this->connection)) { |
||
308 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED); |
||
309 | } |
||
310 | } |
||
311 | if (!$this->autocommit && $ismanip) { |
||
312 | if ($this->transaction_opcount == 0) { |
||
313 | $result = @mysql_query('SET AUTOCOMMIT=0', $this->connection); |
||
314 | $result = @mysql_query('BEGIN', $this->connection); |
||
315 | if (!$result) { |
||
316 | return $this->mysqlRaiseError(); |
||
317 | } |
||
318 | } |
||
319 | $this->transaction_opcount++; |
||
320 | } |
||
321 | if (!$this->options['result_buffering']) { |
||
322 | $result = @mysql_unbuffered_query($query, $this->connection); |
||
323 | } else { |
||
324 | $result = @mysql_query($query, $this->connection); |
||
325 | } |
||
326 | if (!$result) { |
||
327 | return $this->mysqlRaiseError(); |
||
328 | } |
||
329 | if (is_resource($result)) { |
||
330 | return $result; |
||
331 | } |
||
332 | return DB_OK; |
||
333 | } |
||
334 | |||
335 | // }}} |
||
336 | // {{{ nextResult() |
||
337 | |||
338 | /** |
||
339 | * Move the internal mysql result pointer to the next available result |
||
340 | * |
||
341 | * This method has not been implemented yet. |
||
342 | * |
||
343 | * @param a valid sql result resource |
||
344 | * |
||
345 | * @return false |
||
346 | */ |
||
347 | function nextResult($result) |
||
348 | { |
||
349 | return false; |
||
350 | } |
||
351 | |||
352 | // }}} |
||
353 | // {{{ fetchInto() |
||
354 | |||
355 | /** |
||
356 | * Places a row from the result set into the given array |
||
357 | * |
||
358 | * Formating of the array and the data therein are configurable. |
||
359 | * See DB_result::fetchInto() for more information. |
||
360 | * |
||
361 | * This method is not meant to be called directly. Use |
||
362 | * DB_result::fetchInto() instead. It can't be declared "protected" |
||
363 | * because DB_result is a separate object. |
||
364 | * |
||
365 | * @param resource $result the query result resource |
||
366 | * @param array $arr the referenced array to put the data in |
||
367 | * @param int $fetchmode how the resulting array should be indexed |
||
368 | * @param int $rownum the row number to fetch (0 = first row) |
||
369 | * |
||
370 | * @return mixed DB_OK on success, NULL when the end of a result set is |
||
371 | * reached or on failure |
||
372 | * |
||
373 | * @see DB_result::fetchInto() |
||
374 | */ |
||
375 | function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
||
376 | { |
||
377 | if ($rownum !== null) { |
||
378 | if (!@mysql_data_seek($result, $rownum)) { |
||
379 | return null; |
||
380 | } |
||
381 | } |
||
382 | if ($fetchmode & DB_FETCHMODE_ASSOC) { |
||
383 | $arr = @mysql_fetch_array($result, MYSQL_ASSOC); |
||
384 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
||
385 | $arr = array_change_key_case($arr, CASE_LOWER); |
||
386 | } |
||
387 | } else { |
||
388 | $arr = @mysql_fetch_row($result); |
||
389 | } |
||
390 | if (!$arr) { |
||
391 | return null; |
||
392 | } |
||
393 | if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
||
394 | /* |
||
395 | * Even though this DBMS already trims output, we do this because |
||
396 | * a field might have intentional whitespace at the end that |
||
397 | * gets removed by DB_PORTABILITY_RTRIM under another driver. |
||
398 | */ |
||
399 | $this->_rtrimArrayValues($arr); |
||
400 | } |
||
401 | if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
||
402 | $this->_convertNullArrayValuesToEmpty($arr); |
||
403 | } |
||
404 | return DB_OK; |
||
405 | } |
||
406 | |||
407 | // }}} |
||
408 | // {{{ freeResult() |
||
409 | |||
410 | /** |
||
411 | * Deletes the result set and frees the memory occupied by the result set |
||
412 | * |
||
413 | * This method is not meant to be called directly. Use |
||
414 | * DB_result::free() instead. It can't be declared "protected" |
||
415 | * because DB_result is a separate object. |
||
416 | * |
||
417 | * @param resource $result PHP's query result resource |
||
418 | * |
||
419 | * @return bool TRUE on success, FALSE if $result is invalid |
||
420 | * |
||
421 | * @see DB_result::free() |
||
422 | */ |
||
423 | function freeResult($result) |
||
424 | { |
||
425 | return is_resource($result) ? mysql_free_result($result) : false; |
||
426 | } |
||
427 | |||
428 | // }}} |
||
429 | // {{{ numCols() |
||
430 | |||
431 | /** |
||
432 | * Gets the number of columns in a result set |
||
433 | * |
||
434 | * This method is not meant to be called directly. Use |
||
435 | * DB_result::numCols() instead. It can't be declared "protected" |
||
436 | * because DB_result is a separate object. |
||
437 | * |
||
438 | * @param resource $result PHP's query result resource |
||
439 | * |
||
440 | * @return int the number of columns. A DB_Error object on failure. |
||
441 | * |
||
442 | * @see DB_result::numCols() |
||
443 | */ |
||
444 | function numCols($result) |
||
445 | { |
||
446 | $cols = @mysql_num_fields($result); |
||
447 | if (!$cols) { |
||
448 | return $this->mysqlRaiseError(); |
||
449 | } |
||
450 | return $cols; |
||
451 | } |
||
452 | |||
453 | // }}} |
||
454 | // {{{ numRows() |
||
455 | |||
456 | /** |
||
457 | * Gets the number of rows in a result set |
||
458 | * |
||
459 | * This method is not meant to be called directly. Use |
||
460 | * DB_result::numRows() instead. It can't be declared "protected" |
||
461 | * because DB_result is a separate object. |
||
462 | * |
||
463 | * @param resource $result PHP's query result resource |
||
464 | * |
||
465 | * @return int the number of rows. A DB_Error object on failure. |
||
466 | * |
||
467 | * @see DB_result::numRows() |
||
468 | */ |
||
469 | function numRows($result) |
||
470 | { |
||
471 | $rows = @mysql_num_rows($result); |
||
472 | if ($rows === null) { |
||
473 | return $this->mysqlRaiseError(); |
||
474 | } |
||
475 | return $rows; |
||
476 | } |
||
477 | |||
478 | // }}} |
||
479 | // {{{ autoCommit() |
||
480 | |||
481 | /** |
||
482 | * Enables or disables automatic commits |
||
483 | * |
||
484 | * @param bool $onoff true turns it on, false turns it off |
||
485 | * |
||
486 | * @return int DB_OK on success. A DB_Error object if the driver |
||
487 | * doesn't support auto-committing transactions. |
||
488 | */ |
||
489 | function autoCommit($onoff = false) |
||
490 | { |
||
491 | // XXX if $this->transaction_opcount > 0, we should probably |
||
492 | // issue a warning here. |
||
493 | $this->autocommit = $onoff ? true : false; |
||
494 | return DB_OK; |
||
495 | } |
||
496 | |||
497 | // }}} |
||
498 | // {{{ commit() |
||
499 | |||
500 | /** |
||
501 | * Commits the current transaction |
||
502 | * |
||
503 | * @return int DB_OK on success. A DB_Error object on failure. |
||
504 | */ |
||
505 | function commit() |
||
506 | { |
||
507 | if ($this->transaction_opcount > 0) { |
||
508 | if ($this->_db) { |
||
509 | if (!@mysql_select_db($this->_db, $this->connection)) { |
||
510 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED); |
||
511 | } |
||
512 | } |
||
513 | $result = @mysql_query('COMMIT', $this->connection); |
||
514 | $result = @mysql_query('SET AUTOCOMMIT=1', $this->connection); |
||
515 | $this->transaction_opcount = 0; |
||
516 | if (!$result) { |
||
517 | return $this->mysqlRaiseError(); |
||
518 | } |
||
519 | } |
||
520 | return DB_OK; |
||
521 | } |
||
522 | |||
523 | // }}} |
||
524 | // {{{ rollback() |
||
525 | |||
526 | /** |
||
527 | * Reverts the current transaction |
||
528 | * |
||
529 | * @return int DB_OK on success. A DB_Error object on failure. |
||
530 | */ |
||
531 | function rollback() |
||
532 | { |
||
533 | if ($this->transaction_opcount > 0) { |
||
534 | if ($this->_db) { |
||
535 | if (!@mysql_select_db($this->_db, $this->connection)) { |
||
536 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED); |
||
537 | } |
||
538 | } |
||
539 | $result = @mysql_query('ROLLBACK', $this->connection); |
||
540 | $result = @mysql_query('SET AUTOCOMMIT=1', $this->connection); |
||
541 | $this->transaction_opcount = 0; |
||
542 | if (!$result) { |
||
543 | return $this->mysqlRaiseError(); |
||
544 | } |
||
545 | } |
||
546 | return DB_OK; |
||
547 | } |
||
548 | |||
549 | // }}} |
||
550 | // {{{ affectedRows() |
||
551 | |||
552 | /** |
||
553 | * Determines the number of rows affected by a data maniuplation query |
||
554 | * |
||
555 | * 0 is returned for queries that don't manipulate data. |
||
556 | * |
||
557 | * @return int the number of rows. A DB_Error object on failure. |
||
558 | */ |
||
559 | function affectedRows() |
||
560 | { |
||
561 | if ($this->_last_query_manip) { |
||
562 | return @mysql_affected_rows($this->connection); |
||
563 | } else { |
||
564 | return 0; |
||
565 | } |
||
566 | } |
||
567 | |||
568 | // }}} |
||
569 | // {{{ nextId() |
||
570 | |||
571 | /** |
||
572 | * Returns the next free id in a sequence |
||
573 | * |
||
574 | * @param string $seq_name name of the sequence |
||
575 | * @param boolean $ondemand when true, the seqence is automatically |
||
576 | * created if it does not exist |
||
577 | * |
||
578 | * @return int the next id number in the sequence. |
||
579 | * A DB_Error object on failure. |
||
580 | * |
||
581 | * @see DB_common::nextID(), DB_common::getSequenceName(), |
||
582 | * DB_mysql::createSequence(), DB_mysql::dropSequence() |
||
583 | */ |
||
584 | function nextId($seq_name, $ondemand = true) |
||
585 | { |
||
586 | $seqname = $this->getSequenceName($seq_name); |
||
587 | do { |
||
588 | $repeat = 0; |
||
589 | $this->pushErrorHandling(PEAR_ERROR_RETURN); |
||
590 | $result = $this->query("UPDATE ${seqname} ". |
||
591 | 'SET id=LAST_INSERT_ID(id+1)'); |
||
592 | $this->popErrorHandling(); |
||
593 | if ($result === DB_OK) { |
||
594 | // COMMON CASE |
||
595 | $id = @mysql_insert_id($this->connection); |
||
596 | if ($id != 0) { |
||
597 | return $id; |
||
598 | } |
||
599 | // EMPTY SEQ TABLE |
||
600 | // Sequence table must be empty for some reason, so fill |
||
601 | // it and return 1 and obtain a user-level lock |
||
602 | $result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)"); |
||
603 | if (DB::isError($result)) { |
||
604 | return $this->raiseError($result); |
||
605 | } |
||
606 | if ($result == 0) { |
||
607 | // Failed to get the lock |
||
608 | return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED); |
||
609 | } |
||
610 | |||
611 | // add the default value |
||
612 | $result = $this->query("REPLACE INTO ${seqname} (id) VALUES (0)"); |
||
613 | if (DB::isError($result)) { |
||
614 | return $this->raiseError($result); |
||
615 | } |
||
616 | |||
617 | // Release the lock |
||
618 | $result = $this->getOne('SELECT RELEASE_LOCK(' |
||
619 | . "'${seqname}_lock')"); |
||
620 | if (DB::isError($result)) { |
||
621 | return $this->raiseError($result); |
||
622 | } |
||
623 | // We know what the result will be, so no need to try again |
||
624 | return 1; |
||
625 | |||
626 | } elseif ($ondemand && DB::isError($result) && |
||
627 | $result->getCode() == DB_ERROR_NOSUCHTABLE) |
||
628 | { |
||
629 | // ONDEMAND TABLE CREATION |
||
630 | $result = $this->createSequence($seq_name); |
||
631 | if (DB::isError($result)) { |
||
632 | return $this->raiseError($result); |
||
633 | } else { |
||
634 | $repeat = 1; |
||
635 | } |
||
636 | |||
637 | } elseif (DB::isError($result) && |
||
638 | $result->getCode() == DB_ERROR_ALREADY_EXISTS) |
||
639 | { |
||
640 | // BACKWARDS COMPAT |
||
641 | // see _BCsequence() comment |
||
642 | $result = $this->_BCsequence($seqname); |
||
643 | if (DB::isError($result)) { |
||
644 | return $this->raiseError($result); |
||
645 | } |
||
646 | $repeat = 1; |
||
647 | } |
||
648 | } while ($repeat); |
||
649 | |||
650 | return $this->raiseError($result); |
||
651 | } |
||
652 | |||
653 | // }}} |
||
654 | // {{{ createSequence() |
||
655 | |||
656 | /** |
||
657 | * Creates a new sequence |
||
658 | * |
||
659 | * @param string $seq_name name of the new sequence |
||
660 | * |
||
661 | * @return int DB_OK on success. A DB_Error object on failure. |
||
662 | * |
||
663 | * @see DB_common::createSequence(), DB_common::getSequenceName(), |
||
664 | * DB_mysql::nextID(), DB_mysql::dropSequence() |
||
665 | */ |
||
666 | function createSequence($seq_name) |
||
667 | { |
||
668 | $seqname = $this->getSequenceName($seq_name); |
||
669 | $res = $this->query('CREATE TABLE ' . $seqname |
||
670 | . ' (id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,' |
||
671 | . ' PRIMARY KEY(id))'); |
||
672 | if (DB::isError($res)) { |
||
673 | return $res; |
||
674 | } |
||
675 | // insert yields value 1, nextId call will generate ID 2 |
||
676 | $res = $this->query("INSERT INTO ${seqname} (id) VALUES (0)"); |
||
677 | if (DB::isError($res)) { |
||
678 | return $res; |
||
679 | } |
||
680 | // so reset to zero |
||
681 | return $this->query("UPDATE ${seqname} SET id = 0"); |
||
682 | } |
||
683 | |||
684 | // }}} |
||
685 | // {{{ dropSequence() |
||
686 | |||
687 | /** |
||
688 | * Deletes a sequence |
||
689 | * |
||
690 | * @param string $seq_name name of the sequence to be deleted |
||
691 | * |
||
692 | * @return int DB_OK on success. A DB_Error object on failure. |
||
693 | * |
||
694 | * @see DB_common::dropSequence(), DB_common::getSequenceName(), |
||
695 | * DB_mysql::nextID(), DB_mysql::createSequence() |
||
696 | */ |
||
697 | function dropSequence($seq_name) |
||
698 | { |
||
699 | return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)); |
||
700 | } |
||
701 | |||
702 | // }}} |
||
703 | // {{{ _BCsequence() |
||
704 | |||
705 | /** |
||
706 | * Backwards compatibility with old sequence emulation implementation |
||
707 | * (clean up the dupes) |
||
708 | * |
||
709 | * @param string $seqname the sequence name to clean up |
||
710 | * |
||
711 | * @return bool true on success. A DB_Error object on failure. |
||
712 | * |
||
713 | * @access private |
||
714 | */ |
||
715 | function _BCsequence($seqname) |
||
716 | { |
||
717 | // Obtain a user-level lock... this will release any previous |
||
718 | // application locks, but unlike LOCK TABLES, it does not abort |
||
719 | // the current transaction and is much less frequently used. |
||
720 | $result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)"); |
||
721 | if (DB::isError($result)) { |
||
722 | return $result; |
||
723 | } |
||
724 | if ($result == 0) { |
||
725 | // Failed to get the lock, can't do the conversion, bail |
||
726 | // with a DB_ERROR_NOT_LOCKED error |
||
727 | return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED); |
||
728 | } |
||
729 | |||
730 | $highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}"); |
||
731 | if (DB::isError($highest_id)) { |
||
732 | return $highest_id; |
||
733 | } |
||
734 | // This should kill all rows except the highest |
||
735 | // We should probably do something if $highest_id isn't |
||
736 | // numeric, but I'm at a loss as how to handle that... |
||
737 | $result = $this->query('DELETE FROM ' . $seqname |
||
738 | . " WHERE id <> $highest_id"); |
||
739 | if (DB::isError($result)) { |
||
740 | return $result; |
||
741 | } |
||
742 | |||
743 | // If another thread has been waiting for this lock, |
||
744 | // it will go thru the above procedure, but will have no |
||
745 | // real effect |
||
746 | $result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')"); |
||
747 | if (DB::isError($result)) { |
||
748 | return $result; |
||
749 | } |
||
750 | return true; |
||
751 | } |
||
752 | |||
753 | // }}} |
||
754 | // {{{ quoteIdentifier() |
||
755 | |||
756 | /** |
||
757 | * Quotes a string so it can be safely used as a table or column name |
||
758 | * (WARNING: using names that require this is a REALLY BAD IDEA) |
||
759 | * |
||
760 | * WARNING: Older versions of MySQL can't handle the backtick |
||
761 | * character (<kbd>`</kbd>) in table or column names. |
||
762 | * |
||
763 | * @param string $str identifier name to be quoted |
||
764 | * |
||
765 | * @return string quoted identifier string |
||
766 | * |
||
767 | * @see DB_common::quoteIdentifier() |
||
768 | * @since Method available since Release 1.6.0 |
||
769 | */ |
||
770 | function quoteIdentifier($str) |
||
771 | { |
||
772 | return '`' . str_replace('`', '``', $str) . '`'; |
||
773 | } |
||
774 | |||
775 | // }}} |
||
776 | // {{{ quote() |
||
777 | |||
778 | /** |
||
779 | * @deprecated Deprecated in release 1.6.0 |
||
780 | */ |
||
781 | function quote($str) |
||
782 | { |
||
783 | return $this->quoteSmart($str); |
||
784 | } |
||
785 | |||
786 | // }}} |
||
787 | // {{{ escapeSimple() |
||
788 | |||
789 | /** |
||
790 | * Escapes a string according to the current DBMS's standards |
||
791 | * |
||
792 | * @param string $str the string to be escaped |
||
793 | * |
||
794 | * @return string the escaped string |
||
795 | * |
||
796 | * @see DB_common::quoteSmart() |
||
797 | * @since Method available since Release 1.6.0 |
||
798 | */ |
||
799 | function escapeSimple($str) |
||
800 | { |
||
801 | if (function_exists('mysql_real_escape_string')) { |
||
802 | return @mysql_real_escape_string($str, $this->connection); |
||
803 | } else { |
||
804 | return @mysql_escape_string($str); |
||
805 | } |
||
806 | } |
||
807 | |||
808 | // }}} |
||
809 | // {{{ modifyQuery() |
||
810 | |||
811 | /** |
||
812 | * Changes a query string for various DBMS specific reasons |
||
813 | * |
||
814 | * This little hack lets you know how many rows were deleted |
||
815 | * when running a "DELETE FROM table" query. Only implemented |
||
816 | * if the DB_PORTABILITY_DELETE_COUNT portability option is on. |
||
817 | * |
||
818 | * @param string $query the query string to modify |
||
819 | * |
||
820 | * @return string the modified query string |
||
821 | * |
||
822 | * @access protected |
||
823 | * @see DB_common::setOption() |
||
824 | */ |
||
825 | function modifyQuery($query) |
||
826 | { |
||
827 | if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) { |
||
828 | // "DELETE FROM table" gives 0 affected rows in MySQL. |
||
829 | // This little hack lets you know how many rows were deleted. |
||
830 | if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) { |
||
831 | $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/', |
||
832 | 'DELETE FROM \1 WHERE 1=1', $query); |
||
833 | } |
||
834 | } |
||
835 | return $query; |
||
836 | } |
||
837 | |||
838 | // }}} |
||
839 | // {{{ modifyLimitQuery() |
||
840 | |||
841 | /** |
||
842 | * Adds LIMIT clauses to a query string according to current DBMS standards |
||
843 | * |
||
844 | * @param string $query the query to modify |
||
845 | * @param int $from the row to start to fetching (0 = the first row) |
||
846 | * @param int $count the numbers of rows to fetch |
||
847 | * @param mixed $params array, string or numeric data to be used in |
||
848 | * execution of the statement. Quantity of items |
||
849 | * passed must match quantity of placeholders in |
||
850 | * query: meaning 1 placeholder for non-array |
||
851 | * parameters or 1 placeholder per array element. |
||
852 | * |
||
853 | * @return string the query string with LIMIT clauses added |
||
854 | * |
||
855 | * @access protected |
||
856 | */ |
||
857 | function modifyLimitQuery($query, $from, $count, $params = array()) |
||
858 | { |
||
859 | if (DB::isManip($query) || $this->_next_query_manip) { |
||
860 | return $query . " LIMIT $count"; |
||
861 | } else { |
||
862 | return $query . " LIMIT $from, $count"; |
||
863 | } |
||
864 | } |
||
865 | |||
866 | // }}} |
||
867 | // {{{ mysqlRaiseError() |
||
868 | |||
869 | /** |
||
870 | * Produces a DB_Error object regarding the current problem |
||
871 | * |
||
872 | * @param int $errno if the error is being manually raised pass a |
||
873 | * DB_ERROR* constant here. If this isn't passed |
||
874 | * the error information gathered from the DBMS. |
||
875 | * |
||
876 | * @return object the DB_Error object |
||
877 | * |
||
878 | * @see DB_common::raiseError(), |
||
879 | * DB_mysql::errorNative(), DB_common::errorCode() |
||
880 | */ |
||
881 | function mysqlRaiseError($errno = null) |
||
882 | { |
||
883 | if ($errno === null) { |
||
884 | if ($this->options['portability'] & DB_PORTABILITY_ERRORS) { |
||
885 | $this->errorcode_map[1022] = DB_ERROR_CONSTRAINT; |
||
886 | $this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL; |
||
887 | $this->errorcode_map[1062] = DB_ERROR_CONSTRAINT; |
||
888 | } else { |
||
889 | // Doing this in case mode changes during runtime. |
||
890 | $this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS; |
||
891 | $this->errorcode_map[1048] = DB_ERROR_CONSTRAINT; |
||
892 | $this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS; |
||
893 | } |
||
894 | $errno = $this->errorCode(mysql_errno($this->connection)); |
||
895 | } |
||
896 | return $this->raiseError($errno, null, null, null, |
||
897 | @mysql_errno($this->connection) . ' ** ' . |
||
898 | @mysql_error($this->connection)); |
||
899 | } |
||
900 | |||
901 | // }}} |
||
902 | // {{{ errorNative() |
||
903 | |||
904 | /** |
||
905 | * Gets the DBMS' native error code produced by the last query |
||
906 | * |
||
907 | * @return int the DBMS' error code |
||
908 | */ |
||
909 | function errorNative() |
||
910 | { |
||
911 | return @mysql_errno($this->connection); |
||
912 | } |
||
913 | |||
914 | // }}} |
||
915 | // {{{ tableInfo() |
||
916 | |||
917 | /** |
||
918 | * Returns information about a table or a result set |
||
919 | * |
||
920 | * @param object|string $result DB_result object from a query or a |
||
921 | * string containing the name of a table. |
||
922 | * While this also accepts a query result |
||
923 | * resource identifier, this behavior is |
||
924 | * deprecated. |
||
925 | * @param int $mode a valid tableInfo mode |
||
926 | * |
||
927 | * @return array an associative array with the information requested. |
||
928 | * A DB_Error object on failure. |
||
929 | * |
||
930 | * @see DB_common::tableInfo() |
||
931 | */ |
||
932 | function tableInfo($result, $mode = null) |
||
933 | { |
||
934 | if (is_string($result)) { |
||
935 | // Fix for bug #11580. |
||
936 | if ($this->_db) { |
||
937 | if (!@mysql_select_db($this->_db, $this->connection)) { |
||
938 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED); |
||
939 | } |
||
940 | } |
||
941 | |||
942 | /* |
||
943 | * Probably received a table name. |
||
944 | * Create a result resource identifier. |
||
945 | */ |
||
946 | $id = @mysql_query("SELECT * FROM $result LIMIT 0", |
||
947 | $this->connection); |
||
948 | $got_string = true; |
||
949 | } elseif (isset($result->result)) { |
||
950 | /* |
||
951 | * Probably received a result object. |
||
952 | * Extract the result resource identifier. |
||
953 | */ |
||
954 | $id = $result->result; |
||
955 | $got_string = false; |
||
956 | } else { |
||
957 | /* |
||
958 | * Probably received a result resource identifier. |
||
959 | * Copy it. |
||
960 | * Deprecated. Here for compatibility only. |
||
961 | */ |
||
962 | $id = $result; |
||
963 | $got_string = false; |
||
964 | } |
||
965 | |||
966 | if (!is_resource($id)) { |
||
967 | return $this->mysqlRaiseError(DB_ERROR_NEED_MORE_DATA); |
||
968 | } |
||
969 | |||
970 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
||
971 | $case_func = 'strtolower'; |
||
972 | } else { |
||
973 | $case_func = 'strval'; |
||
974 | } |
||
975 | |||
976 | $count = @mysql_num_fields($id); |
||
977 | $res = array(); |
||
978 | |||
979 | if ($mode) { |
||
980 | $res['num_fields'] = $count; |
||
981 | } |
||
982 | |||
983 | for ($i = 0; $i < $count; $i++) { |
||
984 | $res[$i] = array( |
||
985 | 'table' => $case_func(@mysql_field_table($id, $i)), |
||
986 | 'name' => $case_func(@mysql_field_name($id, $i)), |
||
987 | 'type' => @mysql_field_type($id, $i), |
||
988 | 'len' => @mysql_field_len($id, $i), |
||
989 | 'flags' => @mysql_field_flags($id, $i), |
||
990 | ); |
||
991 | if ($mode & DB_TABLEINFO_ORDER) { |
||
992 | $res['order'][$res[$i]['name']] = $i; |
||
993 | } |
||
994 | if ($mode & DB_TABLEINFO_ORDERTABLE) { |
||
995 | $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
||
996 | } |
||
997 | } |
||
998 | |||
999 | // free the result only if we were called on a table |
||
1000 | if ($got_string) { |
||
1001 | @mysql_free_result($id); |
||
1002 | } |
||
1003 | return $res; |
||
1004 | } |
||
1005 | |||
1006 | // }}} |
||
1007 | // {{{ getSpecialQuery() |
||
1008 | |||
1009 | /** |
||
1010 | * Obtains the query string needed for listing a given type of objects |
||
1011 | * |
||
1012 | * @param string $type the kind of objects you want to retrieve |
||
1013 | * |
||
1014 | * @return string the SQL query string or null if the driver doesn't |
||
1015 | * support the object type requested |
||
1016 | * |
||
1017 | * @access protected |
||
1018 | * @see DB_common::getListOf() |
||
1019 | */ |
||
1020 | function getSpecialQuery($type) |
||
1021 | { |
||
1022 | switch ($type) { |
||
1023 | case 'tables': |
||
1024 | return 'SHOW TABLES'; |
||
1025 | case 'users': |
||
1026 | return 'SELECT DISTINCT User FROM mysql.user'; |
||
1027 | case 'databases': |
||
1028 | return 'SHOW DATABASES'; |
||
1029 | default: |
||
1030 | return null; |
||
1031 | } |
||
1032 | } |
||
1033 | |||
1034 | // }}} |
||
1035 | |||
1036 | } |
||
1037 | |||
1038 | /* |
||
1039 | * Local variables: |
||
1040 | * tab-width: 4 |
||
1041 | * c-basic-offset: 4 |
||
1042 | * End: |
||
1043 | */ |
||
1044 | |||
1045 | ?> |