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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Andreas Fischer <bantu@owncloud.com>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Morris Jobke <hey@morrisjobke.de>
* @author tbelau666 <thomas.belau@gmx.de>
*
* @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 Doctrine\DBAL\Schema\AbstractAsset;
use OCP\IConfig;
use function preg_match;
use function preg_quote;
/**
* Various PostgreSQL specific helper functions.
*/
class PgSqlTools {
/** @var \OCP\IConfig */
private $config;
/**
* @param \OCP\IConfig $config
*/
public function __construct(IConfig $config) {
$this->config = $config;
}
/**
* @brief Resynchronizes all sequences of a database after using INSERTs
* without leaving out the auto-incremented column.
* @param \OC\DB\Connection $conn
* @return null
*/
public function resynchronizeDatabaseSequences(Connection $conn) {
$databaseName = $conn->getDatabase();
$conn->getConfiguration()->setSchemaAssetsFilter(function ($asset) {
/** @var string|AbstractAsset $asset */
$filterExpression = '/^' . preg_quote($this->config->getSystemValueString('dbtableprefix', 'oc_')) . '/';
if ($asset instanceof AbstractAsset) {
return preg_match($filterExpression, $asset->getName()) !== false;
}
return preg_match($filterExpression, $asset) !== false;
});
foreach ($conn->getSchemaManager()->listSequences() as $sequence) {
$sequenceName = $sequence->getName();
$sqlInfo = 'SELECT table_schema, table_name, column_name
FROM information_schema.columns
WHERE column_default = ? AND table_catalog = ?';
$result = $conn->executeQuery($sqlInfo, [
"nextval('$sequenceName'::regclass)",
$databaseName
]);
$sequenceInfo = $result->fetchAssociative();
$result->free();
/** @var string $tableName */
$tableName = $sequenceInfo['table_name'];
/** @var string $columnName */
$columnName = $sequenceInfo['column_name'];
$sqlMaxId = "SELECT MAX($columnName) FROM $tableName";
$sqlSetval = "SELECT setval('$sequenceName', ($sqlMaxId))";
$conn->executeQuery($sqlSetval);
}
}
}
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