beedb/include/execution/binary_operator.h

69 lines
2.8 KiB
C++

/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include "operator_interface.h"
#include <memory>
#include <table/schema.h>
#include <table/tuple.h>
namespace beedb::execution
{
/**
* Abstract operator that has to children (left and right)
* for operators JOIN-like operators.
*/
class BinaryOperator : public OperatorInterface
{
public:
explicit BinaryOperator(concurrency::Transaction *transaction) : OperatorInterface(transaction)
{
}
~BinaryOperator() override = default;
void left_child(std::unique_ptr<OperatorInterface> child)
{
_left_child = std::move(child);
}
void right_child(std::unique_ptr<OperatorInterface> child)
{
_right_child = std::move(child);
}
[[nodiscard]] const std::unique_ptr<OperatorInterface> &left_child() const
{
return _left_child;
}
[[nodiscard]] const std::unique_ptr<OperatorInterface> &right_child() const
{
return _right_child;
}
protected:
[[nodiscard]] table::Tuple combine(const table::Schema &new_schema, const table::Tuple &left,
const table::Tuple &right) const;
private:
std::unique_ptr<OperatorInterface> _left_child;
std::unique_ptr<OperatorInterface> _right_child;
};
} // namespace beedb::execution