protected function getInsertObjectIdentitySql($identifier, $classId, $entriesInheriting)
    {
        $query = <<<QUERY
              INSERT INTO %s (class_id, object_identifier, entries_inheriting)
              VALUES (%d, %s, %s)
QUERY;

        return sprintf(
            $query,
            $this->options['oid_table_name'],
            $classId,
            $this->connection->quote($identifier),
            $this->connection->getDatabasePlatform()->convertBooleans($entriesInheriting)
        );
    }