120 lines
4.5 KiB
C++
120 lines
4.5 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 "node_interface.h"
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#include <memory>
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namespace beedb::plan::logical
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{
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class AbstractJoinNode : public BinaryNode
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{
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public:
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explicit AbstractJoinNode(std::string &&name, std::unique_ptr<expression::Operation> &&predicate)
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: BinaryNode(std::move(name)), _predicate(std::move(predicate))
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{
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}
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AbstractJoinNode(const AbstractJoinNode &other, std::string &&name)
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: AbstractJoinNode(std::move(name), other._predicate->copy())
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{
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std::copy(other._schema.begin(), other._schema.end(), std::back_inserter(_schema));
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}
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AbstractJoinNode(const AbstractJoinNode &other, std::string &&name,
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std::unique_ptr<expression::Operation> &&predicate)
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: AbstractJoinNode(std::move(name), std::move(predicate))
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{
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std::copy(other._schema.begin(), other._schema.end(), std::back_inserter(_schema));
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}
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~AbstractJoinNode() override = default;
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[[nodiscard]] const std::unique_ptr<expression::Operation> &predicate() const
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{
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return _predicate;
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}
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const Schema &check_and_emit_schema(TableMap &tables) override
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{
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_schema.clear();
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const auto &left_schema = left_child()->check_and_emit_schema(tables);
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const auto &right_schema = right_child()->check_and_emit_schema(tables);
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expression::for_attribute(_predicate, [&tables](auto &attribute) {
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if (attribute.is_asterisk())
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{
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throw exception::LogicalException("* is not a valid join predicate.");
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}
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tables.check_and_replace_table(attribute);
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});
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_schema.reserve(left_schema.size() + right_schema.size());
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std::copy(left_schema.begin(), left_schema.end(), std::back_inserter(_schema));
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std::copy(right_schema.begin(), right_schema.end(), std::back_inserter(_schema));
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return _schema;
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}
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[[nodiscard]] const Schema &schema() const override
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{
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return _schema;
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}
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private:
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std::unique_ptr<expression::Operation> _predicate;
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Schema _schema;
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};
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class NestedLoopsJoinNode final : public AbstractJoinNode
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{
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public:
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explicit NestedLoopsJoinNode(std::unique_ptr<expression::Operation> &&predicate)
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: AbstractJoinNode("Nested Loops Join", std::move(predicate))
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{
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}
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NestedLoopsJoinNode(const NestedLoopsJoinNode &other, std::unique_ptr<expression::Operation> &&predicate)
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: AbstractJoinNode(other, "Nested Loops Join", std::move(predicate))
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{
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}
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~NestedLoopsJoinNode() override = default;
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};
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class HashJoinNode final : public AbstractJoinNode
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{
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public:
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explicit HashJoinNode(const NestedLoopsJoinNode &other) : AbstractJoinNode(other, "Hash Join")
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{
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}
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HashJoinNode(const HashJoinNode &other, std::unique_ptr<expression::Operation> &&predicate)
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: AbstractJoinNode(other, "Hash Join", std::move(predicate))
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{
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}
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~HashJoinNode() override = default;
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};
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} // namespace beedb::plan::logical
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