public function prepare()
    {
        if (null === $this->statement) {
            $this->statement = $this->db->prepare($this->getSql());
        }

        return $this;
    }
public function prepare()
    {
        if (null === $this->statement) {
            $this->statement = $this->db->prepare($this->getSql());
        }

        return $this;
    }
public function prepare ( ) { if ( null === $ this -> statement ) { $ this -> statement = $ this -> db -> prepare ( $ this -> getSql ( ) ) ; } return $ this ; }
Prepare PDO statement

@return \Ark\Database\QueryBuilder
Prepare PDO statement