| /** |
| * 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_PARSER_PARSE_SET_OPERATION_HPP_ |
| #define QUICKSTEP_PARSER_PARSE_SET_OPERATION_HPP_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "parser/ParseTreeNode.hpp" |
| #include "utility/Macros.hpp" |
| #include "utility/PtrList.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| /** \addtogroup Parser |
| * @{ |
| */ |
| |
| /** |
| * @brief A parsed representation of set operations. |
| */ |
| class ParseSetOperation : public ParseTreeNode { |
| public: |
| /** |
| * @brief The possible types of set operations. |
| */ |
| enum SetOperationType { |
| kIntersect = 0, |
| kSelect, |
| kUnion, |
| kUnionAll |
| }; |
| |
| /** |
| * @brief Constructor. |
| * |
| * @param line_number Line number of the set operation token in the SQL statement. |
| * @param column_number Column number of the set operation toke in the SQL statement. |
| * @param set_operation The set operation type. |
| */ |
| ParseSetOperation(const int line_number, |
| const int column_number, |
| const SetOperationType set_operation_type) |
| : ParseTreeNode(line_number, column_number), |
| set_operation_type_(set_operation_type) { |
| } |
| |
| /** |
| * @brief Destructor. |
| */ |
| ~ParseSetOperation() override {} |
| |
| std::string getName() const override { |
| return "SetOperation"; |
| } |
| |
| /** |
| * @return The set operation type. |
| */ |
| SetOperationType getOperationType() const { |
| return set_operation_type_; |
| } |
| |
| /** |
| * @return The operands of the set operation. |
| */ |
| const PtrList<ParseTreeNode>& operands() const { |
| return operands_; |
| } |
| |
| /** |
| * @brief Add an operand for the set operation. |
| * |
| * @param operand The operand. |
| */ |
| void addOperand(ParseTreeNode *operand) { |
| operands_.push_back(operand); |
| } |
| |
| protected: |
| void getFieldStringItems(std::vector<std::string> *inline_field_names, |
| std::vector<std::string> *inline_field_values, |
| std::vector<std::string> *non_container_child_field_names, |
| std::vector<const ParseTreeNode*> *non_container_child_fields, |
| std::vector<std::string> *container_child_field_names, |
| std::vector<std::vector<const ParseTreeNode*>> *container_child_fields) const override { |
| inline_field_names->push_back("set_operation_type"); |
| switch (set_operation_type_) { |
| case kIntersect: |
| inline_field_values->push_back("Intersect"); |
| break; |
| case kSelect: |
| inline_field_values->push_back("Select"); |
| break; |
| case kUnion: |
| inline_field_values->push_back("Union"); |
| break; |
| case kUnionAll: |
| inline_field_values->push_back("UnionAll"); |
| break; |
| default: |
| LOG(FATAL) << "Unknown set operation type."; |
| } |
| |
| container_child_field_names->push_back("children"); |
| container_child_fields->emplace_back(); |
| for (const ParseTreeNode &child : operands_) { |
| container_child_fields->back().push_back(&child); |
| } |
| } |
| |
| private: |
| PtrList<ParseTreeNode> operands_; |
| const SetOperationType set_operation_type_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ParseSetOperation); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_PARSER_PARSE_SET_OPERATION_HPP_ |