Context Navigation

mysql.php @ 23022

Visit:

Revision 23022, 63.1 KB checked in by Seasoft, 13 years ago (diff)
#2322 (セッションのGC処理がエラーとなる)
Property svn:eol-style set to `LF` Property svn:mime-type set to `text/x-httpd-php; charset=UTF-8`

Line
1	<?php
2	// vim: set et ts=4 sw=4 fdm=marker:
3	// +----------------------------------------------------------------------+
4	// \| PHP versions 4 and 5 \|
5	// +----------------------------------------------------------------------+
6	// \| Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox, \|
7	// \| Stig. S. Bakken, Lukas Smith \|
8	// \| All rights reserved. \|
9	// +----------------------------------------------------------------------+
10	// \| MDB2 is a merge of PEAR DB and Metabases that provides a unified DB \|
11	// \| API as well as database abstraction for PHP applications. \|
12	// \| This LICENSE is in the BSD license style. \|
13	// \| \|
14	// \| Redistribution and use in source and binary forms, with or without \|
15	// \| modification, are permitted provided that the following conditions \|
16	// \| are met: \|
17	// \| \|
18	// \| Redistributions of source code must retain the above copyright \|
19	// \| notice, this list of conditions and the following disclaimer. \|
20	// \| \|
21	// \| Redistributions in binary form must reproduce the above copyright \|
22	// \| notice, this list of conditions and the following disclaimer in the \|
23	// \| documentation and/or other materials provided with the distribution. \|
24	// \| \|
25	// \| Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, \|
26	// \| Lukas Smith nor the names of his contributors may be used to endorse \|
27	// \| or promote products derived from this software without specific prior\|
28	// \| written permission. \|
29	// \| \|
30	// \| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \|
31	// \| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \|
32	// \| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS \|
33	// \| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE \|
34	// \| REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, \|
35	// \| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, \|
36	// \| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS\|
37	// \| OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED \|
38	// \| AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \|
39	// \| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY\|
40	// \| WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE \|
41	// \| POSSIBILITY OF SUCH DAMAGE. \|
42	// +----------------------------------------------------------------------+
43	// \| Author: Lukas Smith <[email protected]> \|
44	// +----------------------------------------------------------------------+
45	//
46	// $Id: mysql.php 327320 2012-08-27 15:52:50Z danielc $
47	//
48
49	/**
50	* MDB2 MySQL driver
51	*
52	* @package MDB2
53	* @category Database
54	* @author Lukas Smith <[email protected]>
55	*/
56	class MDB2_Driver_mysql extends MDB2_Driver_Common
57	{
58	// {{{ properties
59
60	public $string_quoting = array(
61	'start' => "'",
62	'end' => "'",
63	'escape' => '\\',
64	'escape_pattern' => '\\',
65	);
66
67	public $identifier_quoting = array(
68	'start' => '`',
69	'end' => '`',
70	'escape' => '`',
71	);
72
73	public $sql_comments = array(
74	array('start' => '-- ', 'end' => "\n", 'escape' => false),
75	array('start' => '#', 'end' => "\n", 'escape' => false),
76	array('start' => '/', 'end' => '/', 'escape' => false),
77	);
78
79	protected $server_capabilities_checked = false;
80
81	protected $start_transaction = false;
82
83	public $varchar_max_length = 255;
84
85	// }}}
86	// {{{ constructor
87
88	/**
89	* Constructor
90	*/
91	function __construct()
92	{
93	parent::__construct();
94
95	$this->phptype = 'mysql';
96	$this->dbsyntax = 'mysql';
97
98	$this->supported['sequences'] = 'emulated';
99	$this->supported['indexes'] = true;
100	$this->supported['affected_rows'] = true;
101	$this->supported['transactions'] = false;
102	$this->supported['savepoints'] = false;
103	$this->supported['summary_functions'] = true;
104	$this->supported['order_by_text'] = true;
105	$this->supported['current_id'] = 'emulated';
106	$this->supported['limit_queries'] = true;
107	$this->supported['LOBs'] = true;
108	$this->supported['replace'] = true;
109	$this->supported['sub_selects'] = 'emulated';
110	$this->supported['triggers'] = false;
111	$this->supported['auto_increment'] = true;
112	$this->supported['primary_key'] = true;
113	$this->supported['result_introspection'] = true;
114	$this->supported['prepared_statements'] = 'emulated';
115	$this->supported['identifier_quoting'] = true;
116	$this->supported['pattern_escaping'] = true;
117	$this->supported['new_link'] = true;
118
119	$this->options['DBA_username'] = false;
120	$this->options['DBA_password'] = false;
121	$this->options['default_table_type'] = '';
122	$this->options['max_identifiers_length'] = 64;
123
124	$this->_reCheckSupportedOptions();
125	}
126
127	// }}}
128	// {{{ _reCheckSupportedOptions()
129
130	/**
131	* If the user changes certain options, other capabilities may depend
132	* on the new settings, so we need to check them (again).
133	*
134	* @access private
135	*/
136	function _reCheckSupportedOptions()
137	{
138	$this->supported['transactions'] = $this->options['use_transactions'];
139	$this->supported['savepoints'] = $this->options['use_transactions'];
140	if ($this->options['default_table_type']) {
141	switch (strtoupper($this->options['default_table_type'])) {
142	case 'BLACKHOLE':
143	case 'MEMORY':
144	case 'ARCHIVE':
145	case 'CSV':
146	case 'HEAP':
147	case 'ISAM':
148	case 'MERGE':
149	case 'MRG_ISAM':
150	case 'ISAM':
151	case 'MRG_MYISAM':
152	case 'MYISAM':
153	$this->supported['savepoints'] = false;
154	$this->supported['transactions'] = false;
155	$this->warnings[] = $this->options['default_table_type'] .
156	' is not a supported default table type';
157	break;
158	}
159	}
160	}
161
162	// }}}
163	// {{{ function setOption($option, $value)
164
165	/**
166	* set the option for the db class
167	*
168	* @param string option name
169	* @param mixed value for the option
170	*
171	* @return mixed MDB2_OK or MDB2 Error Object
172	*
173	* @access public
174	*/
175	function setOption($option, $value)
176	{
177	$res = parent::setOption($option, $value);
178	$this->_reCheckSupportedOptions();
179	}
180
181	// }}}
182	// {{{ errorInfo()
183
184	/**
185	* This method is used to collect information about an error
186	*
187	* @param integer $error
188	* @return array
189	* @access public
190	*/
191	function errorInfo($error = null)
192	{
193	if ($this->connection) {
194	$native_code = @mysql_errno($this->connection);
195	$native_msg = @mysql_error($this->connection);
196	} else {
197	$native_code = @mysql_errno();
198	$native_msg = @mysql_error();
199	}
200	if (is_null($error)) {
201	static $ecode_map;
202	if (empty($ecode_map)) {
203	$ecode_map = array(
204	1000 => MDB2_ERROR_INVALID, //hashchk
205	1001 => MDB2_ERROR_INVALID, //isamchk
206	1004 => MDB2_ERROR_CANNOT_CREATE,
207	1005 => MDB2_ERROR_CANNOT_CREATE,
208	1006 => MDB2_ERROR_CANNOT_CREATE,
209	1007 => MDB2_ERROR_ALREADY_EXISTS,
210	1008 => MDB2_ERROR_CANNOT_DROP,
211	1009 => MDB2_ERROR_CANNOT_DROP,
212	1010 => MDB2_ERROR_CANNOT_DROP,
213	1011 => MDB2_ERROR_CANNOT_DELETE,
214	1022 => MDB2_ERROR_ALREADY_EXISTS,
215	1029 => MDB2_ERROR_NOT_FOUND,
216	1032 => MDB2_ERROR_NOT_FOUND,
217	1044 => MDB2_ERROR_ACCESS_VIOLATION,
218	1045 => MDB2_ERROR_ACCESS_VIOLATION,
219	1046 => MDB2_ERROR_NODBSELECTED,
220	1048 => MDB2_ERROR_CONSTRAINT,
221	1049 => MDB2_ERROR_NOSUCHDB,
222	1050 => MDB2_ERROR_ALREADY_EXISTS,
223	1051 => MDB2_ERROR_NOSUCHTABLE,
224	1054 => MDB2_ERROR_NOSUCHFIELD,
225	1060 => MDB2_ERROR_ALREADY_EXISTS,
226	1061 => MDB2_ERROR_ALREADY_EXISTS,
227	1062 => MDB2_ERROR_ALREADY_EXISTS,
228	1064 => MDB2_ERROR_SYNTAX,
229	1067 => MDB2_ERROR_INVALID,
230	1072 => MDB2_ERROR_NOT_FOUND,
231	1086 => MDB2_ERROR_ALREADY_EXISTS,
232	1091 => MDB2_ERROR_NOT_FOUND,
233	1100 => MDB2_ERROR_NOT_LOCKED,
234	1109 => MDB2_ERROR_NOT_FOUND,
235	1125 => MDB2_ERROR_ALREADY_EXISTS,
236	1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
237	1138 => MDB2_ERROR_INVALID,
238	1142 => MDB2_ERROR_ACCESS_VIOLATION,
239	1143 => MDB2_ERROR_ACCESS_VIOLATION,
240	1146 => MDB2_ERROR_NOSUCHTABLE,
241	1149 => MDB2_ERROR_SYNTAX,
242	1169 => MDB2_ERROR_CONSTRAINT,
243	1176 => MDB2_ERROR_NOT_FOUND,
244	1177 => MDB2_ERROR_NOSUCHTABLE,
245	1213 => MDB2_ERROR_DEADLOCK,
246	1216 => MDB2_ERROR_CONSTRAINT,
247	1217 => MDB2_ERROR_CONSTRAINT,
248	1227 => MDB2_ERROR_ACCESS_VIOLATION,
249	1235 => MDB2_ERROR_CANNOT_CREATE,
250	1299 => MDB2_ERROR_INVALID_DATE,
251	1300 => MDB2_ERROR_INVALID,
252	1304 => MDB2_ERROR_ALREADY_EXISTS,
253	1305 => MDB2_ERROR_NOT_FOUND,
254	1306 => MDB2_ERROR_CANNOT_DROP,
255	1307 => MDB2_ERROR_CANNOT_CREATE,
256	1334 => MDB2_ERROR_CANNOT_ALTER,
257	1339 => MDB2_ERROR_NOT_FOUND,
258	1356 => MDB2_ERROR_INVALID,
259	1359 => MDB2_ERROR_ALREADY_EXISTS,
260	1360 => MDB2_ERROR_NOT_FOUND,
261	1363 => MDB2_ERROR_NOT_FOUND,
262	1365 => MDB2_ERROR_DIVZERO,
263	1451 => MDB2_ERROR_CONSTRAINT,
264	1452 => MDB2_ERROR_CONSTRAINT,
265	1542 => MDB2_ERROR_CANNOT_DROP,
266	1546 => MDB2_ERROR_CONSTRAINT,
267	1582 => MDB2_ERROR_CONSTRAINT,
268	2003 => MDB2_ERROR_CONNECT_FAILED,
269	2019 => MDB2_ERROR_INVALID,
270	);
271	}
272	if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {
273	$ecode_map[1022] = MDB2_ERROR_CONSTRAINT;
274	$ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;
275	$ecode_map[1062] = MDB2_ERROR_CONSTRAINT;
276	} else {
277	// Doing this in case mode changes during runtime.
278	$ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;
279	$ecode_map[1048] = MDB2_ERROR_CONSTRAINT;
280	$ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;
281	}
282	if (isset($ecode_map[$native_code])) {
283	$error = $ecode_map[$native_code];
284	}
285	}
286	return array($error, $native_code, $native_msg);
287	}
288
289	// }}}
290	// {{{ escape()
291
292	/**
293	* Quotes a string so it can be safely used in a query. It will quote
294	* the text so it can safely be used within a query.
295	*
296	* @param string the input string to quote
297	* @param bool escape wildcards
298	*
299	* @return string quoted string
300	*
301	* @access public
302	*/
303	function escape($text, $escape_wildcards = false)
304	{
305	if ($escape_wildcards) {
306	$text = $this->escapePattern($text);
307	}
308	$connection = $this->getConnection();
309	if (MDB2::isError($connection)) {
310	return $connection;
311	}
312	$text = @mysql_real_escape_string($text, $connection);
313	return $text;
314	}
315
316	// }}}
317	// {{{ beginTransaction()
318
319	/**
320	* Start a transaction or set a savepoint.
321	*
322	* @param string name of a savepoint to set
323	* @return mixed MDB2_OK on success, a MDB2 error on failure
324	*
325	* @access public
326	*/
327	function beginTransaction($savepoint = null)
328	{
329	$this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
330	$this->_getServerCapabilities();
331	if (!is_null($savepoint)) {
332	if (!$this->supports('savepoints')) {
333	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
334	'savepoints are not supported', __FUNCTION__);
335	}
336	if (!$this->in_transaction) {
337	return $this->raiseError(MDB2_ERROR_INVALID, null, null,
338	'savepoint cannot be released when changes are auto committed', __FUNCTION__);
339	}
340	$query = 'SAVEPOINT '.$savepoint;
341	return $this->_doQuery($query, true);
342	} elseif ($this->in_transaction) {
343	return MDB2_OK; //nothing to do
344	}
345	if (!$this->destructor_registered && $this->opened_persistent) {
346	$this->destructor_registered = true;
347	register_shutdown_function('MDB2_closeOpenTransactions');
348	}
349	$query = $this->start_transaction ? 'START TRANSACTION' : 'SET AUTOCOMMIT = 0';
350	$result = $this->_doQuery($query, true);
351	if (MDB2::isError($result)) {
352	return $result;
353	}
354	$this->in_transaction = true;
355	return MDB2_OK;
356	}
357
358	// }}}
359	// {{{ commit()
360
361	/**
362	* Commit the database changes done during a transaction that is in
363	* progress or release a savepoint. This function may only be called when
364	* auto-committing is disabled, otherwise it will fail. Therefore, a new
365	* transaction is implicitly started after committing the pending changes.
366	*
367	* @param string name of a savepoint to release
368	* @return mixed MDB2_OK on success, a MDB2 error on failure
369	*
370	* @access public
371	*/
372	function commit($savepoint = null)
373	{
374	$this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
375	if (!$this->in_transaction) {
376	return $this->raiseError(MDB2_ERROR_INVALID, null, null,
377	'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
378	}
379	if (!is_null($savepoint)) {
380	if (!$this->supports('savepoints')) {
381	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
382	'savepoints are not supported', __FUNCTION__);
383	}
384	$server_info = $this->getServerVersion();
385	if (version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {
386	return MDB2_OK;
387	}
388	$query = 'RELEASE SAVEPOINT '.$savepoint;
389	return $this->_doQuery($query, true);
390	}
391
392	if (!$this->supports('transactions')) {
393	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
394	'transactions are not supported', __FUNCTION__);
395	}
396
397	$result = $this->_doQuery('COMMIT', true);
398	if (MDB2::isError($result)) {
399	return $result;
400	}
401	if (!$this->start_transaction) {
402	$query = 'SET AUTOCOMMIT = 1';
403	$result = $this->_doQuery($query, true);
404	if (MDB2::isError($result)) {
405	return $result;
406	}
407	}
408	$this->in_transaction = false;
409	return MDB2_OK;
410	}
411
412	// }}}
413	// {{{ rollback()
414
415	/**
416	* Cancel any database changes done during a transaction or since a specific
417	* savepoint that is in progress. This function may only be called when
418	* auto-committing is disabled, otherwise it will fail. Therefore, a new
419	* transaction is implicitly started after canceling the pending changes.
420	*
421	* @param string name of a savepoint to rollback to
422	* @return mixed MDB2_OK on success, a MDB2 error on failure
423	*
424	* @access public
425	*/
426	function rollback($savepoint = null)
427	{
428	$this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
429	if (!$this->in_transaction) {
430	return $this->raiseError(MDB2_ERROR_INVALID, null, null,
431	'rollback cannot be done changes are auto committed', __FUNCTION__);
432	}
433	if (!is_null($savepoint)) {
434	if (!$this->supports('savepoints')) {
435	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
436	'savepoints are not supported', __FUNCTION__);
437	}
438	$query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
439	return $this->_doQuery($query, true);
440	}
441
442	$query = 'ROLLBACK';
443	$result = $this->_doQuery($query, true);
444	if (MDB2::isError($result)) {
445	return $result;
446	}
447	if (!$this->start_transaction) {
448	$query = 'SET AUTOCOMMIT = 1';
449	$result = $this->_doQuery($query, true);
450	if (MDB2::isError($result)) {
451	return $result;
452	}
453	}
454	$this->in_transaction = false;
455	return MDB2_OK;
456	}
457
458	// }}}
459	// {{{ function setTransactionIsolation()
460
461	/**
462	* Set the transacton isolation level.
463	*
464	* @param string standard isolation level
465	* READ UNCOMMITTED (allows dirty reads)
466	* READ COMMITTED (prevents dirty reads)
467	* REPEATABLE READ (prevents nonrepeatable reads)
468	* SERIALIZABLE (prevents phantom reads)
469	* @param array some transaction options:
470	* 'wait' => 'WAIT' \| 'NO WAIT'
471	* 'rw' => 'READ WRITE' \| 'READ ONLY'
472	*
473	* @return mixed MDB2_OK on success, a MDB2 error on failure
474	*
475	* @access public
476	* @since 2.1.1
477	*/
478	function setTransactionIsolation($isolation, $options = array())
479	{
480	$this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
481	if (!$this->supports('transactions')) {
482	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
483	'transactions are not supported', __FUNCTION__);
484	}
485	switch ($isolation) {
486	case 'READ UNCOMMITTED':
487	case 'READ COMMITTED':
488	case 'REPEATABLE READ':
489	case 'SERIALIZABLE':
490	break;
491	default:
492	return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
493	'isolation level is not supported: '.$isolation, __FUNCTION__);
494	}
495
496	$query = "SET SESSION TRANSACTION ISOLATION LEVEL $isolation";
497	return $this->_doQuery($query, true);
498	}
499
500	// }}}
501	// {{{ _doConnect()
502
503	/**
504	* do the grunt work of the connect
505	*
506	* @return connection on success or MDB2 Error Object on failure
507	* @access protected
508	*/
509	function _doConnect($username, $password, $persistent = false)
510	{
511	if (!extension_loaded($this->phptype)) {
512	return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
513	'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
514	}
515
516	$params = array();
517	$unix = ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix');
518	if (empty($this->dsn['hostspec'])) {
519	$this->dsn['hostspec'] = $unix ? '' : 'localhost';
520	}
521	if ($this->dsn['hostspec']) {
522	$params[0] = $this->dsn['hostspec'] . ($this->dsn['port'] ? ':' . $this->dsn['port'] : '');
523	} else {
524	$params[0] = ':' . $this->dsn['socket'];
525	}
526	$params[] = $username ? $username : null;
527	$params[] = $password ? $password : null;
528	if (!$persistent) {
529	if ($this->_isNewLinkSet()) {
530	$params[] = true;
531	} else {
532	$params[] = false;
533	}
534	}
535	if (version_compare(phpversion(), '4.3.0', '>=')) {
536	$params[] = isset($this->dsn['client_flags'])
537	? $this->dsn['client_flags'] : null;
538	}
539	$connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
540
541	$connection = @call_user_func_array($connect_function, $params);
542	if (!$connection) {
543	if (($err = @mysql_error()) != '') {
544	return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
545	$err, __FUNCTION__);
546	} else {
547	return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
548	'unable to establish a connection', __FUNCTION__);
549	}
550	}
551
552	if (!empty($this->dsn['charset'])) {
553	$result = $this->setCharset($this->dsn['charset'], $connection);
554	if (MDB2::isError($result)) {
555	$this->disconnect(false);
556	return $result;
557	}
558	}
559
560	return $connection;
561	}
562
563	// }}}
564	// {{{ connect()
565
566	/**
567	* Connect to the database
568	*
569	* @return MDB2_OK on success, MDB2 Error Object on failure
570	* @access public
571	*/
572	function connect()
573	{
574	if (is_resource($this->connection)) {
575	//if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
576	if (MDB2::areEquals($this->connected_dsn, $this->dsn)
577	&& $this->opened_persistent == $this->options['persistent']
578	) {
579	return MDB2_OK;
580	}
581	$this->disconnect(false);
582	}
583
584	$connection = $this->_doConnect(
585	$this->dsn['username'],
586	$this->dsn['password'],
587	$this->options['persistent']
588	);
589	if (MDB2::isError($connection)) {
590	return $connection;
591	}
592
593	$this->connection = $connection;
594	$this->connected_dsn = $this->dsn;
595	$this->connected_database_name = '';
596	$this->opened_persistent = $this->options['persistent'];
597	$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
598
599	if ($this->database_name) {
600	if ($this->database_name != $this->connected_database_name) {
601	if (!@mysql_select_db($this->database_name, $connection)) {
602	$err = $this->raiseError(null, null, null,
603	'Could not select the database: '.$this->database_name, __FUNCTION__);
604	return $err;
605	}
606	$this->connected_database_name = $this->database_name;
607	}
608	}
609
610	$this->_getServerCapabilities();
611
612	return MDB2_OK;
613	}
614
615	// }}}
616	// {{{ setCharset()
617
618	/**
619	* Set the charset on the current connection
620	*
621	* @param string charset (or array(charset, collation))
622	* @param resource connection handle
623	*
624	* @return true on success, MDB2 Error Object on failure
625	*/
626	function setCharset($charset, $connection = null)
627	{
628	if (is_null($connection)) {
629	$connection = $this->getConnection();
630	if (MDB2::isError($connection)) {
631	return $connection;
632	}
633	}
634	$collation = null;
635	if (is_array($charset) && 2 == count($charset)) {
636	$collation = array_pop($charset);
637	$charset = array_pop($charset);
638	}
639	$client_info = mysql_get_client_info();
640	if (function_exists('mysql_set_charset') && version_compare($client_info, '5.0.6')) {
641	if (!$result = mysql_set_charset($charset, $connection)) {
642	$err = $this->raiseError(null, null, null,
643	'Could not set client character set', __FUNCTION__);
644	return $err;
645	}
646	return $result;
647	}
648	$query = "SET NAMES '".mysql_real_escape_string($charset, $connection)."'";
649	if (!is_null($collation)) {
650	$query .= " COLLATE '".mysql_real_escape_string($collation, $connection)."'";
651	}
652	return $this->_doQuery($query, true, $connection);
653	}
654
655	// }}}
656	// {{{ databaseExists()
657
658	/**
659	* check if given database name is exists?
660	*
661	* @param string $name name of the database that should be checked
662	*
663	* @return mixed true/false on success, a MDB2 error on failure
664	* @access public
665	*/
666	function databaseExists($name)
667	{
668	$connection = $this->_doConnect($this->dsn['username'],
669	$this->dsn['password'],
670	$this->options['persistent']);
671	if (MDB2::isError($connection)) {
672	return $connection;
673	}
674
675	$result = @mysql_select_db($name, $connection);
676	@mysql_close($connection);
677
678	return $result;
679	}
680
681	// }}}
682	// {{{ disconnect()
683
684	/**
685	* Log out and disconnect from the database.
686	*
687	* @param boolean $force if the disconnect should be forced even if the
688	* connection is opened persistently
689	* @return mixed true on success, false if not connected and error
690	* object on error
691	* @access public
692	*/
693	function disconnect($force = true)
694	{
695	if (is_resource($this->connection)) {
696	if ($this->in_transaction) {
697	$dsn = $this->dsn;
698	$database_name = $this->database_name;
699	$persistent = $this->options['persistent'];
700	$this->dsn = $this->connected_dsn;
701	$this->database_name = $this->connected_database_name;
702	$this->options['persistent'] = $this->opened_persistent;
703	$this->rollback();
704	$this->dsn = $dsn;
705	$this->database_name = $database_name;
706	$this->options['persistent'] = $persistent;
707	}
708
709	if (!$this->opened_persistent \|\| $force) {
710	$ok = @mysql_close($this->connection);
711	if (!$ok) {
712	return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
713	null, null, null, __FUNCTION__);
714	}
715	}
716	} else {
717	return false;
718	}
719	return parent::disconnect($force);
720	}
721
722	// }}}
723	// {{{ standaloneQuery()
724
725	/**
726	* execute a query as DBA
727	*
728	* @param string $query the SQL query
729	* @param mixed $types array that contains the types of the columns in
730	* the result set
731	* @param boolean $is_manip if the query is a manipulation query
732	* @return mixed MDB2_OK on success, a MDB2 error on failure
733	* @access public
734	*/
735	function standaloneQuery($query, $types = null, $is_manip = false)
736	{
737	$user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
738	$pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
739	$connection = $this->_doConnect($user, $pass, $this->options['persistent']);
740	if (MDB2::isError($connection)) {
741	return $connection;
742	}
743
744	$offset = $this->offset;
745	$limit = $this->limit;
746	$this->offset = $this->limit = 0;
747	$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
748
749	$result = $this->_doQuery($query, $is_manip, $connection, $this->database_name);
750	if (!MDB2::isError($result)) {
751	$result = $this->_affectedRows($connection, $result);
752	}
753
754	@mysql_close($connection);
755	return $result;
756	}
757
758	// }}}
759	// {{{ _doQuery()
760
761	/**
762	* Execute a query
763	* @param string $query query
764	* @param boolean $is_manip if the query is a manipulation query
765	* @param resource $connection
766	* @param string $database_name
767	* @return result or error object
768	* @access protected
769	*/
770	function _doQuery($query, $is_manip = false, $connection = null, $database_name = null)
771	{
772	$this->last_query = $query;
773	$result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
774	if ($result) {
775	if (MDB2::isError($result)) {
776	return $result;
777	}
778	$query = $result;
779	}
780	if ($this->options['disable_query']) {
781	$result = $is_manip ? 0 : null;
782	return $result;
783	}
784
785	if (is_null($connection)) {
786	$connection = $this->getConnection();
787	if (MDB2::isError($connection)) {
788	return $connection;
789	}
790	}
791	if (is_null($database_name)) {
792	$database_name = $this->database_name;
793	}
794
795	if ($database_name) {
796	if ($database_name != $this->connected_database_name) {
797	if (!@mysql_select_db($database_name, $connection)) {
798	$err = $this->raiseError(null, null, null,
799	'Could not select the database: '.$database_name, __FUNCTION__);
800	return $err;
801	}
802	$this->connected_database_name = $database_name;
803	}
804	}
805
806	$function = $this->options['result_buffering']
807	? 'mysql_query' : 'mysql_unbuffered_query';
808	$result = @$function($query, $connection);
809	if (!$result && 0 !== mysql_errno($connection)) {
810	$err = $this->raiseError(null, null, null,
811	'Could not execute statement', __FUNCTION__);
812	return $err;
813	}
814
815	$this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
816	return $result;
817	}
818
819	// }}}
820	// {{{ _affectedRows()
821
822	/**
823	* Returns the number of rows affected
824	*
825	* @param resource $result
826	* @param resource $connection
827	* @return mixed MDB2 Error Object or the number of rows affected
828	* @access private
829	*/
830	function _affectedRows($connection, $result = null)
831	{
832	if (is_null($connection)) {
833	$connection = $this->getConnection();
834	if (MDB2::isError($connection)) {
835	return $connection;
836	}
837	}
838	return @mysql_affected_rows($connection);
839	}
840
841	// }}}
842	// {{{ _modifyQuery()
843
844	/**
845	* Changes a query string for various DBMS specific reasons
846	*
847	* @param string $query query to modify
848	* @param boolean $is_manip if it is a DML query
849	* @param integer $limit limit the number of rows
850	* @param integer $offset start reading from given offset
851	* @return string modified query
852	* @access protected
853	*/
854	function _modifyQuery($query, $is_manip, $limit, $offset)
855	{
856	if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
857	// "DELETE FROM table" gives 0 affected rows in MySQL.
858	// This little hack lets you know how many rows were deleted.
859	if (preg_match('/^\sDELETE\s+FROM\s+(\S+)\s$/i', $query)) {
860	$query = preg_replace('/^\sDELETE\s+FROM\s+(\S+)\s$/',
861	'DELETE FROM \1 WHERE 1=1', $query);
862	}
863	}
864	if ($limit > 0
865	&& !preg_match('/LIMIT\s\d(?:\s(?:,\|OFFSET)\s\d+)?(?:[^\)])?$/i', $query)
866	) {
867	$query = rtrim($query);
868	if (substr($query, -1) == ';') {
869	$query = substr($query, 0, -1);
870	}
871
872	// LIMIT doesn't always come last in the query
873	// @see http://dev.mysql.com/doc/refman/5.0/en/select.html
874	$after = '';
875	if (preg_match('/(\s+INTO\s+(?:OUT\|DUMP)FILE\s.*)$/ims', $query, $matches)) {
876	$after = $matches[0];
877	$query = preg_replace('/(\s+INTO\s+(?:OUT\|DUMP)FILE\s.*)$/ims', '', $query);
878	} elseif (preg_match('/(\s+FOR\s+UPDATE\s*)$/i', $query, $matches)) {
879	$after = $matches[0];
880	$query = preg_replace('/(\s+FOR\s+UPDATE\s*)$/im', '', $query);
881	} elseif (preg_match('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', $query, $matches)) {
882	$after = $matches[0];
883	$query = preg_replace('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', '', $query);
884	}
885
886	if ($is_manip) {
887	return $query . " LIMIT $limit" . $after;
888	} else {
889	return $query . " LIMIT $offset, $limit" . $after;
890	}
891	}
892	return $query;
893	}
894
895	// }}}
896	// {{{ getServerVersion()
897
898	/**
899	* return version information about the server
900	*
901	* @param bool $native determines if the raw version string should be returned
902	* @return mixed array/string with version information or MDB2 error object
903	* @access public
904	*/
905	function getServerVersion($native = false)
906	{
907	$connection = $this->getConnection();
908	if (MDB2::isError($connection)) {
909	return $connection;
910	}
911	if ($this->connected_server_info) {
912	$server_info = $this->connected_server_info;
913	} else {
914	$server_info = @mysql_get_server_info($connection);
915	}
916	if (!$server_info) {
917	return $this->raiseError(null, null, null,
918	'Could not get server information', __FUNCTION__);
919	}
920	// cache server_info
921	$this->connected_server_info = $server_info;
922	if (!$native) {
923	$tmp = explode('.', $server_info, 3);
924	if (isset($tmp[2]) && strpos($tmp[2], '-')) {
925	$tmp2 = explode('-', @$tmp[2], 2);
926	} else {
927	$tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;
928	$tmp2[1] = null;
929	}
930	$server_info = array(
931	'major' => isset($tmp[0]) ? $tmp[0] : null,
932	'minor' => isset($tmp[1]) ? $tmp[1] : null,
933	'patch' => $tmp2[0],
934	'extra' => $tmp2[1],
935	'native' => $server_info,
936	);
937	}
938	return $server_info;
939	}
940
941	// }}}
942	// {{{ _getServerCapabilities()
943
944	/**
945	* Fetch some information about the server capabilities
946	* (transactions, subselects, prepared statements, etc).
947	*
948	* @access private
949	*/
950	function _getServerCapabilities()
951	{
952	if (!$this->server_capabilities_checked) {
953	$this->server_capabilities_checked = true;
954
955	//set defaults
956	$this->supported['sub_selects'] = 'emulated';
957	$this->supported['prepared_statements'] = 'emulated';
958	$this->supported['triggers'] = false;
959	$this->start_transaction = false;
960	$this->varchar_max_length = 255;
961
962	$server_info = $this->getServerVersion();
963	if (is_array($server_info)) {
964	$server_version = $server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'];
965
966	if (!version_compare($server_version, '4.1.0', '<')) {
967	$this->supported['sub_selects'] = true;
968	$this->supported['prepared_statements'] = true;
969	}
970
971	// SAVEPOINTs were introduced in MySQL 4.0.14 and 4.1.1 (InnoDB)
972	if (version_compare($server_version, '4.1.0', '>=')) {
973	if (version_compare($server_version, '4.1.1', '<')) {
974	$this->supported['savepoints'] = false;
975	}
976	} elseif (version_compare($server_version, '4.0.14', '<')) {
977	$this->supported['savepoints'] = false;
978	}
979
980	if (!version_compare($server_version, '4.0.11', '<')) {
981	$this->start_transaction = true;
982	}
983
984	if (!version_compare($server_version, '5.0.3', '<')) {
985	$this->varchar_max_length = 65532;
986	}
987
988	if (!version_compare($server_version, '5.0.2', '<')) {
989	$this->supported['triggers'] = true;
990	}
991	}
992	}
993	}
994
995	// }}}
996	// {{{ function _skipUserDefinedVariable($query, $position)
997
998	/**
999	* Utility method, used by prepare() to avoid misinterpreting MySQL user
1000	* defined variables (SELECT @x:=5) for placeholders.
1001	* Check if the placeholder is a false positive, i.e. if it is an user defined
1002	* variable instead. If so, skip it and advance the position, otherwise
1003	* return the current position, which is valid
1004	*
1005	* @param string $query
1006	* @param integer $position current string cursor position
1007	* @return integer $new_position
1008	* @access protected
1009	*/
1010	function _skipUserDefinedVariable($query, $position)
1011	{
1012	$found = strpos(strrev(substr($query, 0, $position)), '@');
1013	if ($found === false) {
1014	return $position;
1015	}
1016	$pos = strlen($query) - strlen(substr($query, $position)) - $found - 1;
1017	$substring = substr($query, $pos, $position - $pos + 2);
1018	if (preg_match('/^@\w+\s*:=$/', $substring)) {
1019	return $position + 1; //found an user defined variable: skip it
1020	}
1021	return $position;
1022	}
1023
1024	// }}}
1025	// {{{ prepare()
1026
1027	/**
1028	* Prepares a query for multiple execution with execute().
1029	* With some database backends, this is emulated.
1030	* prepare() requires a generic query as string like
1031	* 'INSERT INTO numbers VALUES(?,?)' or
1032	* 'INSERT INTO numbers VALUES(:foo,:bar)'.
1033	* The ? and :name and are placeholders which can be set using
1034	* bindParam() and the query can be sent off using the execute() method.
1035	* The allowed format for :name can be set with the 'bindname_format' option.
1036	*
1037	* @param string $query the query to prepare
1038	* @param mixed $types array that contains the types of the placeholders
1039	* @param mixed $result_types array that contains the types of the columns in
1040	* the result set or MDB2_PREPARE_RESULT, if set to
1041	* MDB2_PREPARE_MANIP the query is handled as a manipulation query
1042	* @param mixed $lobs key (field) value (parameter) pair for all lob placeholders
1043	* @return mixed resource handle for the prepared query on success, a MDB2
1044	* error on failure
1045	* @access public
1046	* @see bindParam, execute
1047	*/
1048	function prepare($query, $types = null, $result_types = null, $lobs = array())
1049	{
1050	// connect to get server capabilities (http://pear.php.net/bugs/16147)
1051	$connection = $this->getConnection();
1052	if (MDB2::isError($connection)) {
1053	return $connection;
1054	}
1055
1056	if ($this->options['emulate_prepared']
1057	\|\| $this->supported['prepared_statements'] !== true
1058	) {
1059	return parent::prepare($query, $types, $result_types, $lobs);
1060	}
1061	$is_manip = ($result_types === MDB2_PREPARE_MANIP);
1062	$offset = $this->offset;
1063	$limit = $this->limit;
1064	$this->offset = $this->limit = 0;
1065	$query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
1066	$result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
1067	if ($result) {
1068	if (MDB2::isError($result)) {
1069	return $result;
1070	}
1071	$query = $result;
1072	}
1073	$placeholder_type_guess = $placeholder_type = null;
1074	$question = '?';
1075	$colon = ':';
1076	$positions = array();
1077	$position = 0;
1078	while ($position < strlen($query)) {
1079	$q_position = strpos($query, $question, $position);
1080	$c_position = strpos($query, $colon, $position);
1081	if ($q_position && $c_position) {
1082	$p_position = min($q_position, $c_position);
1083	} elseif ($q_position) {
1084	$p_position = $q_position;
1085	} elseif ($c_position) {
1086	$p_position = $c_position;
1087	} else {
1088	break;
1089	}
1090	if (is_null($placeholder_type)) {
1091	$placeholder_type_guess = $query[$p_position];
1092	}
1093
1094	$new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
1095	if (MDB2::isError($new_pos)) {
1096	return $new_pos;
1097	}
1098	if ($new_pos != $position) {
1099	$position = $new_pos;
1100	continue; //evaluate again starting from the new position
1101	}
1102
1103	//make sure this is not part of an user defined variable
1104	$new_pos = $this->_skipUserDefinedVariable($query, $position);
1105	if ($new_pos != $position) {
1106	$position = $new_pos;
1107	continue; //evaluate again starting from the new position
1108	}
1109
1110	if ($query[$position] == $placeholder_type_guess) {
1111	if (is_null($placeholder_type)) {
1112	$placeholder_type = $query[$p_position];
1113	$question = $colon = $placeholder_type;
1114	}
1115	if ($placeholder_type == ':') {
1116	$regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
1117	$parameter = preg_replace($regexp, '\\1', $query);
1118	if ($parameter === '') {
1119	$err = $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
1120	'named parameter name must match "bindname_format" option', __FUNCTION__);
1121	return $err;
1122	}
1123	$positions[$p_position] = $parameter;
1124	$query = substr_replace($query, '?', $position, strlen($parameter)+1);
1125	} else {
1126	$positions[$p_position] = count($positions);
1127	}
1128	$position = $p_position + 1;
1129	} else {
1130	$position = $p_position;
1131	}
1132	}
1133
1134	static $prep_statement_counter = 1;
1135	$statement_name = sprintf($this->options['statement_format'], $this->phptype, $prep_statement_counter++ . sha1(microtime() + mt_rand()));
1136	$statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
1137	$query = "PREPARE $statement_name FROM ".$this->quote($query, 'text');
1138	$statement = $this->_doQuery($query, true, $connection);
1139	if (MDB2::isError($statement)) {
1140	return $statement;
1141	}
1142
1143	$class_name = 'MDB2_Statement_'.$this->phptype;
1144	$obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
1145	$this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
1146	return $obj;
1147	}
1148
1149	// }}}
1150	// {{{ replace()
1151
1152	/**
1153	* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
1154	* query, except that if there is already a row in the table with the same
1155	* key field values, the old row is deleted before the new row is inserted.
1156	*
1157	* The REPLACE type of query does not make part of the SQL standards. Since
1158	* practically only MySQL implements it natively, this type of query is
1159	* emulated through this method for other DBMS using standard types of
1160	* queries inside a transaction to assure the atomicity of the operation.
1161	*
1162	* @access public
1163	*
1164	* @param string $table name of the table on which the REPLACE query will
1165	* be executed.
1166	* @param array $fields associative array that describes the fields and the
1167	* values that will be inserted or updated in the specified table. The
1168	* indexes of the array are the names of all the fields of the table. The
1169	* values of the array are also associative arrays that describe the
1170	* values and other properties of the table fields.
1171	*
1172	* Here follows a list of field properties that need to be specified:
1173	*
1174	* value:
1175	* Value to be assigned to the specified field. This value may be
1176	* of specified in database independent type format as this
1177	* function can perform the necessary datatype conversions.
1178	*
1179	* Default:
1180	* this property is required unless the Null property
1181	* is set to 1.
1182	*
1183	* type
1184	* Name of the type of the field. Currently, all types Metabase
1185	* are supported except for clob and blob.
1186	*
1187	* Default: no type conversion
1188	*
1189	* null
1190	* Boolean property that indicates that the value for this field
1191	* should be set to null.
1192	*
1193	* The default value for fields missing in INSERT queries may be
1194	* specified the definition of a table. Often, the default value
1195	* is already null, but since the REPLACE may be emulated using
1196	* an UPDATE query, make sure that all fields of the table are
1197	* listed in this function argument array.
1198	*
1199	* Default: 0
1200	*
1201	* key
1202	* Boolean property that indicates that this field should be
1203	* handled as a primary key or at least as part of the compound
1204	* unique index of the table that will determine the row that will
1205	* updated if it exists or inserted a new row otherwise.
1206	*
1207	* This function will fail if no key field is specified or if the
1208	* value of a key field is set to null because fields that are
1209	* part of unique index they may not be null.
1210	*
1211	* Default: 0
1212	*
1213	* @see http://dev.mysql.com/doc/refman/5.0/en/replace.html
1214	* @return mixed MDB2_OK on success, a MDB2 error on failure
1215	*/
1216	function replace($table, $fields)
1217	{
1218	$count = count($fields);
1219	$query = $values = '';
1220	$keys = $colnum = 0;
1221	for (reset($fields); $colnum < $count; next($fields), $colnum++) {
1222	$name = key($fields);
1223	if ($colnum > 0) {
1224	$query .= ',';
1225	$values.= ',';
1226	}
1227	$query.= $this->quoteIdentifier($name, true);
1228	if (isset($fields[$name]['null']) && $fields[$name]['null']) {
1229	$value = 'NULL';
1230	} else {
1231	$type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
1232	$value = $this->quote($fields[$name]['value'], $type);
1233	if (MDB2::isError($value)) {
1234	return $value;
1235	}
1236	}
1237	$values.= $value;
1238	if (isset($fields[$name]['key']) && $fields[$name]['key']) {
1239	if ($value === 'NULL') {
1240	return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
1241	'key value '.$name.' may not be NULL', __FUNCTION__);
1242	}
1243	$keys++;
1244	}
1245	}
1246	if ($keys == 0) {
1247	return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
1248	'not specified which fields are keys', __FUNCTION__);
1249	}
1250
1251	$connection = $this->getConnection();
1252	if (MDB2::isError($connection)) {
1253	return $connection;
1254	}
1255
1256	$table = $this->quoteIdentifier($table, true);
1257	$query = "REPLACE INTO $table ($query) VALUES ($values)";
1258	$result = $this->_doQuery($query, true, $connection);
1259	if (MDB2::isError($result)) {
1260	return $result;
1261	}
1262	return $this->_affectedRows($connection, $result);
1263	}
1264
1265	// }}}
1266	// {{{ nextID()
1267
1268	/**
1269	* Returns the next free id of a sequence
1270	*
1271	* @param string $seq_name name of the sequence
1272	* @param boolean $ondemand when true the sequence is
1273	* automatic created, if it
1274	* not exists
1275	*
1276	* @return mixed MDB2 Error Object or id
1277	* @access public
1278	*/
1279	function nextID($seq_name, $ondemand = true)
1280	{
1281	$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
1282	$seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
1283	$query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";
1284	$this->pushErrorHandling(PEAR_ERROR_RETURN);
1285	$this->expectError(MDB2_ERROR_NOSUCHTABLE);
1286	$result = $this->_doQuery($query, true);
1287	$this->popExpect();
1288	$this->popErrorHandling();
1289	if (MDB2::isError($result)) {
1290	if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
1291	$this->loadModule('Manager', null, true);
1292	$result = $this->manager->createSequence($seq_name);
1293	if (MDB2::isError($result)) {
1294	return $this->raiseError($result, null, null,
1295	'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
1296	} else {
1297	return $this->nextID($seq_name, false);
1298	}
1299	}
1300	return $result;
1301	}
1302	$value = $this->lastInsertID();
1303	if (is_numeric($value)) {
1304	$query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
1305	$result = $this->_doQuery($query, true);
1306	if (MDB2::isError($result)) {
1307	$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
1308	}
1309	}
1310	return $value;
1311	}
1312
1313	// }}}
1314	// {{{ lastInsertID()
1315
1316	/**
1317	* Returns the autoincrement ID if supported or $id or fetches the current
1318	* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
1319	*
1320	* @param string $table name of the table into which a new row was inserted
1321	* @param string $field name of the field into which a new row was inserted
1322	* @return mixed MDB2 Error Object or id
1323	* @access public
1324	*/
1325	function lastInsertID($table = null, $field = null)
1326	{
1327	// not using mysql_insert_id() due to http://pear.php.net/bugs/bug.php?id=8051
1328	// not casting to integer to handle BIGINT http://pear.php.net/bugs/bug.php?id=17650
1329	return $this->queryOne('SELECT LAST_INSERT_ID()');
1330	}
1331
1332	// }}}
1333	// {{{ currID()
1334
1335	/**
1336	* Returns the current id of a sequence
1337	*
1338	* @param string $seq_name name of the sequence
1339	* @return mixed MDB2 Error Object or id
1340	* @access public
1341	*/
1342	function currID($seq_name)
1343	{
1344	$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
1345	$seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
1346	$query = "SELECT MAX($seqcol_name) FROM $sequence_name";
1347	return $this->queryOne($query, 'integer');
1348	}
1349	}
1350
1351	/**
1352	* MDB2 MySQL result driver
1353	*
1354	* @package MDB2
1355	* @category Database
1356	* @author Lukas Smith <[email protected]>
1357	*/
1358	class MDB2_Result_mysql extends MDB2_Result_Common
1359	{
1360	// }}}
1361	// {{{ fetchRow()
1362
1363	/**
1364	* Fetch a row and insert the data into an existing array.
1365	*
1366	* @param int $fetchmode how the array data should be indexed
1367	* @param int $rownum number of the row where the data can be found
1368	* @return int data array on success, a MDB2 error on failure
1369	* @access public
1370	*/
1371	function fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
1372	{
1373	if (!is_null($rownum)) {
1374	$seek = $this->seek($rownum);
1375	if (MDB2::isError($seek)) {
1376	return $seek;
1377	}
1378	}
1379	if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
1380	$fetchmode = $this->db->fetchmode;
1381	}
1382	if ( $fetchmode == MDB2_FETCHMODE_ASSOC
1383	\|\| $fetchmode == MDB2_FETCHMODE_OBJECT
1384	) {
1385	$row = @mysql_fetch_assoc($this->result);
1386	if (is_array($row)
1387	&& $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
1388	) {
1389	$row = array_change_key_case($row, $this->db->options['field_case']);
1390	}
1391	} else {
1392	$row = @mysql_fetch_row($this->result);
1393	}
1394
1395	if (!$row) {
1396	if ($this->result === false) {
1397	$err = $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
1398	'resultset has already been freed', __FUNCTION__);
1399	return $err;
1400	}
1401	return null;
1402	}
1403	$mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
1404	$rtrim = false;
1405	if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
1406	if (empty($this->types)) {
1407	$mode += MDB2_PORTABILITY_RTRIM;
1408	} else {
1409	$rtrim = true;
1410	}
1411	}
1412	if ($mode) {
1413	$this->db->_fixResultArrayValues($row, $mode);
1414	}
1415	if ( ( $fetchmode != MDB2_FETCHMODE_ASSOC
1416	&& $fetchmode != MDB2_FETCHMODE_OBJECT)
1417	&& !empty($this->types)
1418	) {
1419	$row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
1420	} elseif (($fetchmode == MDB2_FETCHMODE_ASSOC
1421	\|\| $fetchmode == MDB2_FETCHMODE_OBJECT)
1422	&& !empty($this->types_assoc)
1423	) {
1424	$row = $this->db->datatype->convertResultRow($this->types_assoc, $row, $rtrim);
1425	}
1426	if (!empty($this->values)) {
1427	$this->_assignBindColumns($row);
1428	}
1429	if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
1430	$object_class = $this->db->options['fetch_class'];
1431	if ($object_class == 'stdClass') {
1432	$row = (object) $row;
1433	} else {
1434	$rowObj = new $object_class($row);
1435	$row = $rowObj;
1436	}
1437	}
1438	++$this->rownum;
1439	return $row;
1440	}
1441
1442	// }}}
1443	// {{{ _getColumnNames()
1444
1445	/**
1446	* Retrieve the names of columns returned by the DBMS in a query result.
1447	*
1448	* @return mixed Array variable that holds the names of columns as keys
1449	* or an MDB2 error on failure.
1450	* Some DBMS may not return any columns when the result set
1451	* does not contain any rows.
1452	* @access private
1453	*/
1454	function _getColumnNames()
1455	{
1456	$columns = array();
1457	$numcols = $this->numCols();
1458	if (MDB2::isError($numcols)) {
1459	return $numcols;
1460	}
1461	for ($column = 0; $column < $numcols; $column++) {
1462	$column_name = @mysql_field_name($this->result, $column);
1463	$columns[$column_name] = $column;
1464	}
1465	if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
1466	$columns = array_change_key_case($columns, $this->db->options['field_case']);
1467	}
1468	return $columns;
1469	}
1470
1471	// }}}
1472	// {{{ numCols()
1473
1474	/**
1475	* Count the number of columns returned by the DBMS in a query result.
1476	*
1477	* @return mixed integer value with the number of columns, a MDB2 error
1478	* on failure
1479	* @access public
1480	*/
1481	function numCols()
1482	{
1483	$cols = @mysql_num_fields($this->result);
1484	if (is_null($cols)) {
1485	if ($this->result === false) {
1486	return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
1487	'resultset has already been freed', __FUNCTION__);
1488	} elseif (is_null($this->result)) {
1489	return count($this->types);
1490	}
1491	return $this->db->raiseError(null, null, null,
1492	'Could not get column count', __FUNCTION__);
1493	}
1494	return $cols;
1495	}
1496
1497	// }}}
1498	// {{{ free()
1499
1500	/**
1501	* Free the internal resources associated with result.
1502	*
1503	* @return boolean true on success, false if result is invalid
1504	* @access public
1505	*/
1506	function free()
1507	{
1508	if (is_resource($this->result) && $this->db->connection) {
1509	$free = @mysql_free_result($this->result);
1510	if ($free === false) {
1511	return $this->db->raiseError(null, null, null,
1512	'Could not free result', __FUNCTION__);
1513	}
1514	}
1515	$this->result = false;
1516	return MDB2_OK;
1517	}
1518	}
1519
1520	/**
1521	* MDB2 MySQL buffered result driver
1522	*
1523	* @package MDB2
1524	* @category Database
1525	* @author Lukas Smith <[email protected]>
1526	*/
1527	class MDB2_BufferedResult_mysql extends MDB2_Result_mysql
1528	{
1529	// }}}
1530	// {{{ seek()
1531
1532	/**
1533	* Seek to a specific row in a result set
1534	*
1535	* @param int $rownum number of the row where the data can be found
1536	* @return mixed MDB2_OK on success, a MDB2 error on failure
1537	* @access public
1538	*/
1539	function seek($rownum = 0)
1540	{
1541	if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {
1542	if ($this->result === false) {
1543	return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
1544	'resultset has already been freed', __FUNCTION__);
1545	} elseif (is_null($this->result)) {
1546	return MDB2_OK;
1547	}
1548	return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
1549	'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
1550	}
1551	$this->rownum = $rownum - 1;
1552	return MDB2_OK;
1553	}
1554
1555	// }}}
1556	// {{{ valid()
1557
1558	/**
1559	* Check if the end of the result set has been reached
1560	*
1561	* @return mixed true or false on sucess, a MDB2 error on failure
1562	* @access public
1563	*/
1564	function valid()
1565	{
1566	$numrows = $this->numRows();
1567	if (MDB2::isError($numrows)) {
1568	return $numrows;
1569	}
1570	return $this->rownum < ($numrows - 1);
1571	}
1572
1573	// }}}
1574	// {{{ numRows()
1575
1576	/**
1577	* Returns the number of rows in a result object
1578	*
1579	* @return mixed MDB2 Error Object or the number of rows
1580	* @access public
1581	*/
1582	function numRows()
1583	{
1584	$rows = @mysql_num_rows($this->result);
1585	if (false === $rows) {
1586	if (false === $this->result) {
1587	return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
1588	'resultset has already been freed', __FUNCTION__);
1589	} elseif (is_null($this->result)) {
1590	return 0;
1591	}
1592	return $this->db->raiseError(null, null, null,
1593	'Could not get row count', __FUNCTION__);
1594	}
1595	return $rows;
1596	}
1597
1598	// }}}
1599	}
1600
1601	/**
1602	* MDB2 MySQL statement driver
1603	*
1604	* @package MDB2
1605	* @category Database
1606	* @author Lukas Smith <[email protected]>
1607	*/
1608	class MDB2_Statement_mysql extends MDB2_Statement_Common
1609	{
1610	// {{{ _execute()
1611
1612	/**
1613	* Execute a prepared query statement helper method.
1614	*
1615	* @param mixed $result_class string which specifies which result class to use
1616	* @param mixed $result_wrap_class string which specifies which class to wrap results in
1617	*
1618	* @return mixed MDB2_Result or integer (affected rows) on success,
1619	* a MDB2 error on failure
1620	* @access private
1621	*/
1622	function _execute($result_class = true, $result_wrap_class = true)
1623	{
1624	if (is_null($this->statement)) {
1625	$result = parent::_execute($result_class, $result_wrap_class);
1626	return $result;
1627	}
1628	$this->db->last_query = $this->query;
1629	$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
1630	if ($this->db->getOption('disable_query')) {
1631	$result = $this->is_manip ? 0 : null;
1632	return $result;
1633	}
1634
1635	$connection = $this->db->getConnection();
1636	if (MDB2::isError($connection)) {
1637	return $connection;
1638	}
1639
1640	$query = 'EXECUTE '.$this->statement;
1641	if (!empty($this->positions)) {
1642	$parameters = array();
1643	foreach ($this->positions as $parameter) {
1644	if (!array_key_exists($parameter, $this->values)) {
1645	return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
1646	'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
1647	}
1648	$close = false;
1649	$value = $this->values[$parameter];
1650	$type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
1651	if (is_resource($value) \|\| $type == 'clob' \|\| $type == 'blob' && $this->db->options['lob_allow_url_include']) {
1652	if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
1653	if ($match[1] == 'file://') {
1654	$value = $match[2];
1655	}
1656	$value = @fopen($value, 'r');
1657	$close = true;
1658	}
1659	if (is_resource($value)) {
1660	$data = '';
1661	while (!@feof($value)) {
1662	$data.= @fread($value, $this->db->options['lob_buffer_length']);
1663	}
1664	if ($close) {
1665	@fclose($value);
1666	}
1667	$value = $data;
1668	}
1669	}
1670	$quoted = $this->db->quote($value, $type);
1671	if (MDB2::isError($quoted)) {
1672	return $quoted;
1673	}
1674	$param_query = 'SET @'.$parameter.' = '.$quoted;
1675	$result = $this->db->_doQuery($param_query, true, $connection);
1676	if (MDB2::isError($result)) {
1677	return $result;
1678	}
1679	}
1680	$query.= ' USING @'.implode(', @', array_values($this->positions));
1681	}
1682
1683	$result = $this->db->_doQuery($query, $this->is_manip, $connection);
1684	if (MDB2::isError($result)) {
1685	return $result;
1686	}
1687
1688	if ($this->is_manip) {
1689	$affected_rows = $this->db->_affectedRows($connection, $result);
1690	return $affected_rows;
1691	}
1692
1693	$result = $this->db->_wrapResult($result, $this->result_types,
1694	$result_class, $result_wrap_class, $this->limit, $this->offset);
1695	$this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
1696	return $result;
1697	}
1698
1699	// }}}
1700	// {{{ free()
1701
1702	/**
1703	* Release resources allocated for the specified prepared query.
1704	*
1705	* @return mixed MDB2_OK on success, a MDB2 error on failure
1706	* @access public
1707	*/
1708	function free()
1709	{
1710	if (is_null($this->positions)) {
1711	return $this->db->raiseError(MDB2_ERROR, null, null,
1712	'Prepared statement has already been freed', __FUNCTION__);
1713	}
1714	$result = MDB2_OK;
1715
1716	if (!is_null($this->statement)) {
1717	$connection = $this->db->getConnection();
1718	if (MDB2::isError($connection)) {
1719	return $connection;
1720	}
1721	$query = 'DEALLOCATE PREPARE '.$this->statement;
1722	$result = $this->db->_doQuery($query, true, $connection);
1723	}
1724
1725	parent::free();
1726	return $result;
1727	}
1728	}
1729	?>

Note: See TracBrowser for help on using the repository browser.

Context Navigation

source: branches/version-2_13-dev/data/module/MDB2/Driver/mysql.php @ 23022

Download in other formats: