/** * Returns the passed query after rewriting the DISTINCT clause, so that drivers * that do not support the "ON" part can provide the actual way it should be done * * @param Query $query The query to be transformed * @return Query */ protected function _transformDistinct($query) { if (is_array($query->clause('distinct'))) { $query->group($query->clause('distinct'), true); $query->distinct(false); } return $query; }