| /** |
| * 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 "query_optimizer/rules/CollapseProject.hpp" |
| |
| #include <vector> |
| |
| #include "query_optimizer/expressions/NamedExpression.hpp" |
| #include "query_optimizer/logical/Logical.hpp" |
| #include "query_optimizer/logical/PatternMatcher.hpp" |
| #include "query_optimizer/logical/Project.hpp" |
| #include "query_optimizer/rules/Rule.hpp" |
| #include "query_optimizer/rules/RuleHelper.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| namespace optimizer { |
| |
| namespace E = ::quickstep::optimizer::expressions; |
| namespace L = ::quickstep::optimizer::logical; |
| |
| L::LogicalPtr CollapseProject::applyToNode(const L::LogicalPtr &input) { |
| L::ProjectPtr project; |
| L::ProjectPtr child_project; |
| |
| if (L::SomeProject::MatchesWithConditionalCast(input, &project) && |
| L::SomeProject::MatchesWithConditionalCast(project->input(), &child_project)) { |
| std::vector<E::NamedExpressionPtr> project_expressions = |
| project->project_expressions(); |
| PullUpProjectExpressions(child_project->project_expressions(), |
| {} /* non_project_expression_lists */, |
| {&project_expressions} /* project_expression_lists */); |
| L::LogicalPtr output = L::Project::Create(child_project->input(), project_expressions); |
| LOG_APPLYING_RULE(input, output); |
| return output; |
| } |
| |
| LOG_IGNORING_RULE(input); |
| return input; |
| } |
| |
| } // namespace optimizer |
| } // namespace quickstep |