public function set( $where, $andOr=null )
    {
        if( $where instanceof Where ) {
            if( $where->countCriteria() > 1 ) {
                $where->parenthesis();
            }
            $where->setParent( $this );
            return $this->where( '', false, $where, $andOr );
        }
        return $this->where( '', false, Sql::raw($where), $andOr );
    }