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