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<?php
/**
* Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
* Copyright (c) 2014 Andreas Fischer <bantu@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\DB;
use OCP\IConfig;
/**
* 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) {
$filterExpression = '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
$databaseName = $conn->getDatabase();
$conn->getConfiguration()->setFilterSchemaAssetsExpression($filterExpression);
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 = ?';
$sequenceInfo = $conn->fetchAssoc($sqlInfo, array(
"nextval('$sequenceName'::regclass)",
$databaseName
));
$tableName = $sequenceInfo['table_name'];
$columnName = $sequenceInfo['column_name'];
$sqlMaxId = "SELECT MAX($columnName) FROM $tableName";
$sqlSetval = "SELECT setval('$sequenceName', ($sqlMaxId))";
$conn->executeQuery($sqlSetval);
}
}
}
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