| /** |
| * 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_LOGICAL_GENERATOR_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_GENERATOR_HPP_ |
| |
| #include "query_optimizer/logical/Logical.hpp" |
| #include "utility/Macros.hpp" |
| |
| namespace quickstep { |
| |
| class CatalogDatabase; |
| class ParseStatement; |
| |
| namespace optimizer { |
| |
| class OptimizerContext; |
| |
| /** \addtogroup QueryOptimizer |
| * @{ |
| */ |
| |
| /** |
| * @brief Generates a logical plan from a parse tree. |
| */ |
| class LogicalGenerator { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param optimizer_context The optimizer context. |
| */ |
| explicit LogicalGenerator(OptimizerContext *optimizer_context); |
| |
| /** |
| * @brief Destructor. |
| */ |
| ~LogicalGenerator(); |
| |
| /** |
| * @return The current logical plan. |
| */ |
| const logical::LogicalPtr& logical_plan() const { return logical_plan_; } |
| |
| /** |
| * @brief Converts the parse tree to a logical plan and optimizes the logical |
| * plan by using rules. |
| * |
| * @param catalog_database The catalog database where this query is executed. |
| * @param parse_statement The parse tree to be converted. |
| * @return An optimized logical plan. |
| */ |
| logical::LogicalPtr generatePlan(const CatalogDatabase &catalog_database, |
| const ParseStatement &parse_statement); |
| |
| private: |
| /** |
| * @brief Applies rules to the logical plan. |
| */ |
| void optimizePlan(); |
| |
| OptimizerContext *optimizer_context_; |
| logical::LogicalPtr logical_plan_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LogicalGenerator); |
| }; |
| |
| /** @} */ |
| |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_GENERATOR_HPP_ */ |