71 lines
1.9 KiB
PHP
71 lines
1.9 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2017, ownCloud GmbH
|
|
*
|
|
* @author Joas Schilling <coding@schilljs.com>
|
|
* @author Thomas Müller <thomas.mueller@tmit.eu>
|
|
*
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
namespace OC\DB;
|
|
|
|
use OCP\IDBConnection;
|
|
|
|
/**
|
|
* Various MySQL specific helper functions.
|
|
*/
|
|
class MySqlTools {
|
|
|
|
/**
|
|
* @param Connection $connection
|
|
* @return bool
|
|
*/
|
|
public function supports4ByteCharset(IDBConnection $connection) {
|
|
$variables = ['innodb_file_per_table' => 'ON'];
|
|
if (!$this->isMariaDBWithLargePrefix($connection)) {
|
|
$variables['innodb_file_format'] = 'Barracuda';
|
|
$variables['innodb_large_prefix'] = 'ON';
|
|
}
|
|
|
|
foreach ($variables as $var => $val) {
|
|
$result = $connection->executeQuery("SHOW VARIABLES LIKE '$var'");
|
|
$row = $result->fetch();
|
|
$result->closeCursor();
|
|
if ($row === false) {
|
|
return false;
|
|
}
|
|
if (strcasecmp($row['Value'], $val) !== 0) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
protected function isMariaDBWithLargePrefix(IDBConnection $connection) {
|
|
$result = $connection->executeQuery('SELECT VERSION()');
|
|
$row = strtolower($result->fetchColumn());
|
|
$result->closeCursor();
|
|
|
|
if ($row === false) {
|
|
return false;
|
|
}
|
|
|
|
return strpos($row, 'maria') && version_compare($row, '10.3', '>=') ||
|
|
strpos($row, 'maria') === false && version_compare($row, '8.0', '>=');
|
|
}
|
|
}
|