| /** |
| * Copyright 2011-2015 Quickstep Technologies LLC. |
| * Copyright 2015 Pivotal Software, Inc. |
| * |
| * Licensed 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 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 parse_statement The parse tree to be converted. |
| * @return An optimized logical plan. |
| */ |
| logical::LogicalPtr generatePlan(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_ */ |