// check PostgreSQL version
                        try {
                                $result = \OC_DB::executeAudited('SHOW SERVER_VERSION');
                                $data = $result->fetchRow();
                                if (isset($data['server_version'])) {
                                        $version = $data['server_version'];
                                        if (version_compare($version, '9.0.0', '<')) {
                                                $errors[] = array(
                                                        'error' => $l->t('PostgreSQL >= 9 required'),
                                                        'hint' => $l->t('Please upgrade your database version')
                                                );
                                        }
                                }
                        } catch (\Doctrine\DBAL\DBALException $e) {