| /** |
| * 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. |
| **/ |
| |
| #include "parser/ParseCaseExpressions.hpp" |
| |
| #include <memory> |
| #include <sstream> |
| #include <string> |
| #include <vector> |
| |
| #include "parser/ParseExpression.hpp" |
| #include "parser/ParsePredicate.hpp" |
| #include "parser/ParseTreeNode.hpp" |
| |
| namespace quickstep { |
| |
| void ParseSimpleWhenClause::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 { |
| non_container_child_field_names->push_back("condition_operand"); |
| non_container_child_fields->push_back(condition_operand_.get()); |
| |
| non_container_child_field_names->push_back("result_expression"); |
| non_container_child_fields->push_back(result_expression_.get()); |
| } |
| |
| void ParseSearchedWhenClause::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 { |
| non_container_child_field_names->push_back("condition_predicate"); |
| non_container_child_fields->push_back(condition_predicate_.get()); |
| |
| non_container_child_field_names->push_back("result_expression"); |
| non_container_child_fields->push_back(result_expression_.get()); |
| } |
| |
| std::string ParseSimpleCaseExpression::generateName() const { |
| std::ostringstream out; |
| out << "CASE " << case_operand_->generateName(); |
| for (const ParseSimpleWhenClause &when_clause : *when_clauses_) { |
| out << " WHEN " << when_clause.condition_operand()->generateName() |
| << " THEN " << when_clause.result_expression()->generateName(); |
| } |
| if (else_result_expression_ != nullptr) { |
| out << " ELSE " << else_result_expression_->generateName(); |
| } |
| out << " END"; |
| return out.str(); |
| } |
| |
| void ParseSimpleCaseExpression::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 { |
| non_container_child_field_names->push_back("case_operand"); |
| non_container_child_fields->push_back(case_operand_.get()); |
| |
| container_child_field_names->push_back("when_clauses"); |
| container_child_fields->emplace_back(); |
| for (const ParseSimpleWhenClause &when_clause : *when_clauses_) { |
| container_child_fields->back().push_back(&when_clause); |
| } |
| |
| if (else_result_expression_ != nullptr) { |
| non_container_child_field_names->push_back("else_result_expression"); |
| non_container_child_fields->push_back(else_result_expression_.get()); |
| } |
| } |
| |
| std::string ParseSearchedCaseExpression::generateName() const { |
| std::ostringstream out; |
| out << "CASE"; |
| for (const ParseSearchedWhenClause &when_clause : *when_clauses_) { |
| // TODO(jianqiao): implement generateName() for Predicate. |
| out << " WHEN " << when_clause.condition_predicate()->getShortString() |
| << " THEN " << when_clause.result_expression()->generateName(); |
| } |
| if (else_result_expression_ != nullptr) { |
| out << " ELSE " << else_result_expression_->generateName(); |
| } |
| out << " END"; |
| return out.str(); |
| } |
| |
| void ParseSearchedCaseExpression::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 { |
| container_child_field_names->push_back("when_clauses"); |
| container_child_fields->emplace_back(); |
| for (const ParseSearchedWhenClause &when_clause : *when_clauses_) { |
| container_child_fields->back().push_back(&when_clause); |
| } |
| |
| if (else_result_expression_ != nullptr) { |
| non_container_child_field_names->push_back("else_result_expression"); |
| non_container_child_fields->push_back(else_result_expression_.get()); |
| } |
| } |
| |
| } // namespace quickstep |