/**
         * Special method to query the table by its primary key.
         *
         * If primary key is compound, only the columns that
         * belong to they key will be used for the query
         */
        public function having_id_is($id) {
            return (is_array($this->_get_id_column_name())) ?
                $this->having($this->_get_compound_id_column_values($value)) :
                $this->having($this->_get_id_column_name(), $id);
        }