1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
|
<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Exception;
use Piwik\DataAccess\TableMetadata;
use Piwik\Db\Adapter;
/**
* Contains SQL related helper functions for Piwik's MySQL database.
*
* Plugins should always use this class to execute SQL against the database.
*
* ### Examples
*
* $rows = Db::fetchAll("SELECT col1, col2 FROM mytable WHERE thing = ?", array('thingvalue'));
* foreach ($rows as $row) {
* doSomething($row['col1'], $row['col2']);
* }
*
* $value = Db::fetchOne("SELECT MAX(col1) FROM mytable");
* doSomethingElse($value);
*
* Db::query("DELETE FROM mytable WHERE id < ?", array(23));
*
* @api
*/
class Db
{
private static $connection = null;
private static $logQueries = true;
/**
* Returns the database connection and creates it if it hasn't been already.
*
* @return \Piwik\Tracker\Db|\Piwik\Db\AdapterInterface|\Piwik\Db
*/
public static function get()
{
if (SettingsServer::isTrackerApiRequest()) {
return Tracker::getDatabase();
}
if (!self::hasDatabaseObject()) {
self::createDatabaseObject();
}
return self::$connection;
}
public static function getDatabaseConfig($dbConfig = null)
{
$config = Config::getInstance();
if (is_null($dbConfig)) {
$dbConfig = $config->database;
}
/**
* Triggered before a database connection is established.
*
* This event can be used to change the settings used to establish a connection.
*
* @param array *$dbInfos Reference to an array containing database connection info,
* including:
*
* - **host**: The host name or IP address to the MySQL database.
* - **username**: The username to use when connecting to the
* database.
* - **password**: The password to use when connecting to the
* database.
* - **dbname**: The name of the Piwik MySQL database.
* - **port**: The MySQL database port to use.
* - **adapter**: either `'PDO\MYSQL'` or `'MYSQLI'`
* - **type**: The MySQL engine to use, for instance 'InnoDB'
*/
Piwik::postEvent('Db.getDatabaseConfig', array(&$dbConfig));
$dbConfig['profiler'] = @$config->Debug['enable_sql_profiler'];
return $dbConfig;
}
/**
* Connects to the database.
*
* Shouldn't be called directly, use {@link get()} instead.
*
* @param array|null $dbConfig Connection parameters in an array. Defaults to the `[database]`
* INI config section.
*/
public static function createDatabaseObject($dbConfig = null)
{
$dbConfig = self::getDatabaseConfig($dbConfig);
$db = @Adapter::factory($dbConfig['adapter'], $dbConfig);
self::$connection = $db;
}
/**
* Detect whether a database object is initialized / created or not.
*
* @internal
*/
public static function hasDatabaseObject()
{
return isset(self::$connection);
}
/**
* Disconnects and destroys the database connection.
*
* For tests.
*/
public static function destroyDatabaseObject()
{
DbHelper::disconnectDatabase();
self::$connection = null;
}
/**
* Executes an unprepared SQL query. Recommended for DDL statements like `CREATE`,
* `DROP` and `ALTER`. The return value is DBMS-specific. For MySQLI, it returns the
* number of rows affected. For PDO, it returns a
* [Zend_Db_Statement](http://framework.zend.com/manual/1.12/en/zend.db.statement.html) object.
*
* @param string $sql The SQL query.
* @throws \Exception If there is an error in the SQL.
* @return integer|\Zend_Db_Statement
*/
public static function exec($sql)
{
/** @var \Zend_Db_Adapter_Abstract $db */
$db = self::get();
$profiler = $db->getProfiler();
$q = $profiler->queryStart($sql, \Zend_Db_Profiler::INSERT);
try {
self::logSql(__FUNCTION__, $sql);
$return = self::get()->exec($sql);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
$profiler->queryEnd($q);
return $return;
}
/**
* Executes an SQL query and returns the [Zend_Db_Statement](http://framework.zend.com/manual/1.12/en/zend.db.statement.html)
* for the query.
*
* This method is meant for non-query SQL statements like `INSERT` and `UPDATE. If you want to fetch
* data from the DB you should use one of the fetch... functions.
*
* @param string $sql The SQL query.
* @param array $parameters Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`.
* @throws \Exception If there is a problem with the SQL or bind parameters.
* @return \Zend_Db_Statement
*/
public static function query($sql, $parameters = array())
{
try {
self::logSql(__FUNCTION__, $sql, $parameters);
return self::get()->query($sql, $parameters);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
}
/**
* Executes an SQL `SELECT` statement and returns all fetched rows from the result set.
*
* @param string $sql The SQL query.
* @param array $parameters Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`.
* @throws \Exception If there is a problem with the SQL or bind parameters.
* @return array The fetched rows, each element is an associative array mapping column names
* with column values.
*/
public static function fetchAll($sql, $parameters = array())
{
try {
self::logSql(__FUNCTION__, $sql, $parameters);
return self::get()->fetchAll($sql, $parameters);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
}
/**
* Executes an SQL `SELECT` statement and returns the first row of the result set.
*
* @param string $sql The SQL query.
* @param array $parameters Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`.
* @throws \Exception If there is a problem with the SQL or bind parameters.
* @return array The fetched row, each element is an associative array mapping column names
* with column values.
*/
public static function fetchRow($sql, $parameters = array())
{
try {
self::logSql(__FUNCTION__, $sql, $parameters);
return self::get()->fetchRow($sql, $parameters);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
}
/**
* Executes an SQL `SELECT` statement and returns the first column value of the first
* row in the result set.
*
* @param string $sql The SQL query.
* @param array $parameters Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`.
* @throws \Exception If there is a problem with the SQL or bind parameters.
* @return string
*/
public static function fetchOne($sql, $parameters = array())
{
try {
self::logSql(__FUNCTION__, $sql, $parameters);
return self::get()->fetchOne($sql, $parameters);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
}
/**
* Executes an SQL `SELECT` statement and returns the entire result set indexed by the first
* selected field.
*
* @param string $sql The SQL query.
* @param array $parameters Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`.
* @throws \Exception If there is a problem with the SQL or bind parameters.
* @return array eg,
* ```
* array('col1value1' => array('col2' => '...', 'col3' => ...),
* 'col1value2' => array('col2' => '...', 'col3' => ...))
* ```
*/
public static function fetchAssoc($sql, $parameters = array())
{
try {
self::logSql(__FUNCTION__, $sql, $parameters);
return self::get()->fetchAssoc($sql, $parameters);
} catch (Exception $ex) {
self::logExtraInfoIfDeadlock($ex);
throw $ex;
}
}
/**
* Deletes all desired rows in a table, while using a limit. This function will execute many
* DELETE queries until there are no more rows to delete.
*
* Use this function when you need to delete many thousands of rows from a table without
* locking the table for too long.
*
* **Example**
*
* // delete all visit rows whose ID is less than a certain value, 100000 rows at a time
* $idVisit = // ...
* Db::deleteAllRows(Common::prefixTable('log_visit'), "WHERE idvisit <= ?", "idvisit ASC", 100000, array($idVisit));
*
* @param string $table The name of the table to delete from. Must be prefixed (see {@link Piwik\Common::prefixTable()}).
* @param string $where The where clause of the query. Must include the WHERE keyword.
* @param string $orderBy The column to order by and the order by direction, eg, `idvisit ASC`.
* @param int $maxRowsPerQuery The maximum number of rows to delete per `DELETE` query.
* @param array $parameters Parameters to bind for each query.
* @return int The total number of rows deleted.
*/
public static function deleteAllRows($table, $where, $orderBy, $maxRowsPerQuery = 100000, $parameters = array())
{
$orderByClause = $orderBy ? "ORDER BY $orderBy" : "";
$sql = "DELETE FROM $table $where $orderByClause
LIMIT " . (int)$maxRowsPerQuery;
// delete rows w/ a limit
$totalRowsDeleted = 0;
do {
$rowsDeleted = self::query($sql, $parameters)->rowCount();
$totalRowsDeleted += $rowsDeleted;
} while ($rowsDeleted >= $maxRowsPerQuery);
return $totalRowsDeleted;
}
/**
* Runs an `OPTIMIZE TABLE` query on the supplied table or tables.
*
* Tables will only be optimized if the `[General] enable_sql_optimize_queries` INI config option is
* set to **1**.
*
* @param string|array $tables The name of the table to optimize or an array of tables to optimize.
* Table names must be prefixed (see {@link Piwik\Common::prefixTable()}).
* @param bool $force If true, the `OPTIMIZE TABLE` query will be run even if InnoDB tables are being used.
* @return \Zend_Db_Statement
*/
public static function optimizeTables($tables, $force = false)
{
$optimize = Config::getInstance()->General['enable_sql_optimize_queries'];
if (empty($optimize)
&& !$force
) {
return false;
}
if (empty($tables)) {
return false;
}
if (!is_array($tables)) {
$tables = array($tables);
}
if (!self::isOptimizeInnoDBSupported()
&& !$force
) {
// filter out all InnoDB tables
$myisamDbTables = array();
foreach (self::getTableStatus() as $row) {
if (strtolower($row['Engine']) == 'myisam'
&& in_array($row['Name'], $tables)
) {
$myisamDbTables[] = $row['Name'];
}
}
$tables = $myisamDbTables;
}
if (empty($tables)) {
return false;
}
// optimize the tables
return self::query("OPTIMIZE TABLE " . implode(',', $tables));
}
private static function getTableStatus()
{
return Db::fetchAll("SHOW TABLE STATUS");
}
/**
* Drops the supplied table or tables.
*
* @param string|array $tables The name of the table to drop or an array of table names to drop.
* Table names must be prefixed (see {@link Piwik\Common::prefixTable()}).
* @return \Zend_Db_Statement
*/
public static function dropTables($tables)
{
if (!is_array($tables)) {
$tables = array($tables);
}
return self::query("DROP TABLE `" . implode('`,`', $tables) . "`");
}
/**
* Drops all tables
*/
public static function dropAllTables()
{
$tablesAlreadyInstalled = DbHelper::getTablesInstalled();
self::dropTables($tablesAlreadyInstalled);
}
/**
* Get columns information from table
*
* @param string|array $table The name of the table you want to get the columns definition for.
* @return \Zend_Db_Statement
* @deprecated since 2.11.0
*/
public static function getColumnNamesFromTable($table)
{
$tableMetadataAccess = new TableMetadata();
return $tableMetadataAccess->getColumns($table);
}
/**
* Locks the supplied table or tables.
*
* **NOTE:** Piwik does not require the `LOCK TABLES` privilege to be available. Piwik
* should still work if it has not been granted.
*
* @param string|array $tablesToRead The table or tables to obtain 'read' locks on. Table names must
* be prefixed (see {@link Piwik\Common::prefixTable()}).
* @param string|array $tablesToWrite The table or tables to obtain 'write' locks on. Table names must
* be prefixed (see {@link Piwik\Common::prefixTable()}).
* @return \Zend_Db_Statement
*/
public static function lockTables($tablesToRead, $tablesToWrite = array())
{
if (!is_array($tablesToRead)) {
$tablesToRead = array($tablesToRead);
}
if (!is_array($tablesToWrite)) {
$tablesToWrite = array($tablesToWrite);
}
$lockExprs = array();
foreach ($tablesToWrite as $table) {
$lockExprs[] = $table . " WRITE";
}
foreach ($tablesToRead as $table) {
$lockExprs[] = $table . " READ";
}
return self::exec("LOCK TABLES " . implode(', ', $lockExprs));
}
/**
* Releases all table locks.
*
* **NOTE:** Piwik does not require the `LOCK TABLES` privilege to be available. Piwik
* should still work if it has not been granted.
*
* @return \Zend_Db_Statement
*/
public static function unlockAllTables()
{
return self::exec("UNLOCK TABLES");
}
/**
* Performs a `SELECT` statement on a table one chunk at a time and returns the first
* successfully fetched value.
*
* This function will execute a query on one set of rows in a table. If nothing
* is fetched, it will execute the query on the next set of rows and so on until
* the query returns a value.
*
* This function will break up a `SELECT into several smaller `SELECT`s and
* should be used when performing a `SELECT` that can take a long time to finish.
* Using several smaller `SELECT`s will ensure that the table will not be locked
* for too long.
*
* **Example**
*
* // find the most recent visit that is older than a certain date
* $dateStart = // ...
* $sql = "SELECT idvisit
* FROM $logVisit
* WHERE '$dateStart' > visit_last_action_time
* AND idvisit <= ?
* AND idvisit > ?
* ORDER BY idvisit DESC
* LIMIT 1";
*
* // since visits
* return Db::segmentedFetchFirst($sql, $maxIdVisit, 0, -self::$selectSegmentSize);
*
* @param string $sql The SQL to perform. The last two conditions of the `WHERE`
* expression must be as follows: `'id >= ? AND id < ?'` where
* **id** is the int id of the table.
* @param int $first The minimum ID to loop from.
* @param int $last The maximum ID to loop to.
* @param int $step The maximum number of rows to scan in one query.
* @param array $params Parameters to bind in the query, eg, `array(param1 => value1, param2 => value2)`
*
* @return string
*/
public static function segmentedFetchFirst($sql, $first, $last, $step, $params = array())
{
$result = false;
if ($step > 0) {
for ($i = $first; $result === false && $i <= $last; $i += $step) {
$result = self::fetchOne($sql, array_merge($params, array($i, $i + $step)));
}
} else {
for ($i = $first; $result === false && $i >= $last; $i += $step) {
$result = self::fetchOne($sql, array_merge($params, array($i, $i + $step)));
}
}
return $result;
}
/**
* Performs a `SELECT` on a table one chunk at a time and returns an array
* of every fetched value.
*
* This function will break up a `SELECT` query into several smaller queries by
* using only a limited number of rows at a time. It will accumulate the results
* of each smaller query and return the result.
*
* This function should be used when performing a `SELECT` that can
* take a long time to finish. Using several smaller queries will ensure that
* the table will not be locked for too long.
*
* @param string $sql The SQL to perform. The last two conditions of the `WHERE`
* expression must be as follows: `'id >= ? AND id < ?'` where
* **id** is the int id of the table.
* @param int $first The minimum ID to loop from.
* @param int $last The maximum ID to loop to.
* @param int $step The maximum number of rows to scan in one query.
* @param array $params Parameters to bind in the query, `array(param1 => value1, param2 => value2)`
* @return array An array of primitive values.
*/
public static function segmentedFetchOne($sql, $first, $last, $step, $params = array())
{
$result = array();
if ($step > 0) {
for ($i = $first; $i <= $last; $i += $step) {
$result[] = self::fetchOne($sql, array_merge($params, array($i, $i + $step)));
}
} else {
for ($i = $first; $i >= $last; $i += $step) {
$result[] = self::fetchOne($sql, array_merge($params, array($i, $i + $step)));
}
}
return $result;
}
/**
* Performs a SELECT on a table one chunk at a time and returns an array
* of every fetched row.
*
* This function will break up a `SELECT` query into several smaller queries by
* using only a limited number of rows at a time. It will accumulate the results
* of each smaller query and return the result.
*
* This function should be used when performing a `SELECT` that can
* take a long time to finish. Using several smaller queries will ensure that
* the table will not be locked for too long.
*
* @param string $sql The SQL to perform. The last two conditions of the `WHERE`
* expression must be as follows: `'id >= ? AND id < ?'` where
* **id** is the int id of the table.
* @param int $first The minimum ID to loop from.
* @param int $last The maximum ID to loop to.
* @param int $step The maximum number of rows to scan in one query.
* @param array $params Parameters to bind in the query, array( param1 => value1, param2 => value2)
* @return array An array of rows that includes the result set of every smaller
* query.
*/
public static function segmentedFetchAll($sql, $first, $last, $step, $params = array())
{
$result = array();
if ($step > 0) {
for ($i = $first; $i <= $last; $i += $step) {
$currentParams = array_merge($params, array($i, $i + $step));
$result = array_merge($result, self::fetchAll($sql, $currentParams));
}
} else {
for ($i = $first; $i >= $last; $i += $step) {
$currentParams = array_merge($params, array($i, $i + $step));
$result = array_merge($result, self::fetchAll($sql, $currentParams));
}
}
return $result;
}
/**
* Performs a `UPDATE` or `DELETE` statement on a table one chunk at a time.
*
* This function will break up a query into several smaller queries by
* using only a limited number of rows at a time.
*
* This function should be used when executing a non-query statement will
* take a long time to finish. Using several smaller queries will ensure that
* the table will not be locked for too long.
*
* @param string $sql The SQL to perform. The last two conditions of the `WHERE`
* expression must be as follows: `'id >= ? AND id < ?'` where
* **id** is the int id of the table.
* @param int $first The minimum ID to loop from.
* @param int $last The maximum ID to loop to.
* @param int $step The maximum number of rows to scan in one query.
* @param array $params Parameters to bind in the query, `array(param1 => value1, param2 => value2)`
*/
public static function segmentedQuery($sql, $first, $last, $step, $params = array())
{
if ($step > 0) {
for ($i = $first; $i <= $last; $i += $step) {
$currentParams = array_merge($params, array($i, $i + $step));
self::query($sql, $currentParams);
}
} else {
for ($i = $first; $i >= $last; $i += $step) {
$currentParams = array_merge($params, array($i, $i + $step));
self::query($sql, $currentParams);
}
}
}
/**
* Returns `true` if a table in the database, `false` if otherwise.
*
* @param string $tableName The name of the table to check for. Must be prefixed.
* @return bool
*/
public static function tableExists($tableName)
{
return self::query("SHOW TABLES LIKE ?", $tableName)->rowCount() > 0;
}
/**
* Attempts to get a named lock. This function uses a timeout of 1s, but will
* retry a set number of times.
*
* @param string $lockName The lock name.
* @param int $maxRetries The max number of times to retry.
* @return bool `true` if the lock was obtained, `false` if otherwise.
*/
public static function getDbLock($lockName, $maxRetries = 30)
{
/*
* the server (e.g., shared hosting) may have a low wait timeout
* so instead of a single GET_LOCK() with a 30 second timeout,
* we use a 1 second timeout and loop, to avoid losing our MySQL
* connection
*/
$sql = 'SELECT GET_LOCK(?, 1)';
$db = self::get();
while ($maxRetries > 0) {
if ($db->fetchOne($sql, array($lockName)) == '1') {
return true;
}
$maxRetries--;
}
return false;
}
/**
* Releases a named lock.
*
* @param string $lockName The lock name.
* @return bool `true` if the lock was released, `false` if otherwise.
*/
public static function releaseDbLock($lockName)
{
$sql = 'SELECT RELEASE_LOCK(?)';
$db = self::get();
return $db->fetchOne($sql, array($lockName)) == '1';
}
/**
* Cached result of isLockprivilegeGranted function.
*
* Public so tests can simulate the situation where the lock tables privilege isn't granted.
*
* @var bool
* @ignore
*/
public static $lockPrivilegeGranted = null;
/**
* Checks whether the database user is allowed to lock tables.
*
* @return bool
*/
public static function isLockPrivilegeGranted()
{
if (is_null(self::$lockPrivilegeGranted)) {
try {
Db::lockTables(Common::prefixTable('log_visit'));
Db::unlockAllTables();
self::$lockPrivilegeGranted = true;
} catch (Exception $ex) {
self::$lockPrivilegeGranted = false;
}
}
return self::$lockPrivilegeGranted;
}
private static function logExtraInfoIfDeadlock($ex)
{
if (self::get()->isErrNo($ex, 1213)) {
$deadlockInfo = self::fetchAll("SHOW ENGINE INNODB STATUS");
// log using exception so backtrace appears in log output
Log::debug(new Exception("Encountered deadlock: " . print_r($deadlockInfo, true)));
}
}
private static function logSql($functionName, $sql, $parameters = array())
{
if (self::$logQueries === false
|| @Config::getInstance()->Debug['log_sql_queries'] != 1
) {
return;
}
// NOTE: at the moment we don't log parameters in order to avoid sensitive information leaks
Log::debug("Db::%s() executing SQL: %s", $functionName, $sql);
}
/**
* @param bool $enable
*/
public static function enableQueryLog($enable)
{
self::$logQueries = $enable;
}
/**
* @return boolean
*/
public static function isQueryLogEnabled()
{
return self::$logQueries;
}
public static function isOptimizeInnoDBSupported($version = null)
{
if ($version === null) {
$version = Db::fetchOne("SELECT VERSION()");
}
$version = strtolower($version);
if (strpos($version, "mariadb") === false) {
return false;
}
$semanticVersion = strstr($version, '-', $beforeNeedle = true);
return version_compare($semanticVersion, '10.1.1', '>=');
}
}
|