public function getSlice($offset, $length)
    {
        $select = clone $this->select;
        $sql = $select
            ->offset($offset)
            ->limit($length)
            ->getStatement();
        $sth = $this->pdo->prepare($sql);
        $sth->execute($this->select->getBindValues());
        $result = $sth->fetchAll(\PDO::FETCH_ASSOC);

        return $result;
    }
public function getSlice($offset, $length)
    {
        $select = clone $this->select;
        $sql = $select
            ->offset($offset)
            ->limit($length)
            ->getStatement();
        $sth = $this->pdo->prepare($sql);
        $sth->execute($this->select->getBindValues());
        $result = $sth->fetchAll(\PDO::FETCH_ASSOC);

        return $result;
    }
{@inheritdoc}