/*------------------------------------------------------------------------------* * 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 * * Roland Kühn * * Jan Mühlig * *------------------------------------------------------------------------------* */ #pragma once #include "binary_operator.h" #include #include #include
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#include #include namespace beedb::execution { /** * Generates a cross product of two sources. */ class CrossProductOperator final : public BinaryOperator { public: CrossProductOperator(concurrency::Transaction *transaction, table::Schema &&schema); ~CrossProductOperator() override = default; void open() override; util::optional next() override; void close() override; [[nodiscard]] const table::Schema &schema() const override { return _schema; } private: const table::Schema _schema; util::optional _next_left_tuple; }; } // namespace beedb::execution