| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| **/ |
| |
| #ifndef QUICKSTEP_QUERY_OPTIMIZER_RULES_REFERENCED_BASE_RELATIONS_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_RULES_REFERENCED_BASE_RELATIONS_HPP_ |
| |
| #include <string> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "query_optimizer/logical/Logical.hpp" |
| #include "query_optimizer/rules/Rule.hpp" |
| #include "utility/Macros.hpp" |
| |
| namespace quickstep { |
| |
| class CatalogRelation; |
| |
| namespace optimizer { |
| |
| class OptimizerContext; |
| |
| class ReferencedBaseRelations : public Rule<logical::Logical> { |
| public: |
| /** |
| * @brief Constructor |
| * @param optimizer_context The optimizer context. |
| */ |
| explicit ReferencedBaseRelations(OptimizerContext *optimizer_context) |
| : optimizer_context_(optimizer_context) { |
| } |
| |
| std::string getName() const override { return "ReferencedBaseRelations"; } |
| |
| logical::LogicalPtr apply(const logical::LogicalPtr &input) override; |
| |
| /** |
| * @brief Get the base relations referenced in a query. |
| */ |
| std::vector<const CatalogRelation*> getReferencedBaseRelations() const { |
| std::vector<const CatalogRelation*> ret; |
| for (auto it = referenced_base_relations_.begin(); |
| it != referenced_base_relations_.end(); |
| ++it) { |
| ret.push_back(it->second); |
| } |
| return ret; |
| } |
| |
| private: |
| void applyToNode(const logical::LogicalPtr &input); |
| |
| OptimizerContext *optimizer_context_; |
| |
| std::unordered_map<relation_id, const CatalogRelation*> referenced_base_relations_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ReferencedBaseRelations); |
| }; |
| |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_QUERY_OPTIMIZER_RULES_REFERENCED_BASE_RELATIONS_HPP_ |