| /** |
| * 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/physical/NestedLoopsJoin.hpp" |
| |
| #include <string> |
| #include <vector> |
| |
| #include "query_optimizer/OptimizerTree.hpp" |
| #include "query_optimizer/expressions/AttributeReference.hpp" |
| #include "query_optimizer/expressions/ExpressionUtil.hpp" |
| #include "query_optimizer/expressions/NamedExpression.hpp" |
| |
| namespace quickstep { |
| namespace optimizer { |
| namespace physical { |
| |
| std::vector<expressions::AttributeReferencePtr> NestedLoopsJoin::getReferencedAttributes() const { |
| std::vector<expressions::AttributeReferencePtr> referenced_attributes; |
| for (const expressions::NamedExpressionPtr &project_expression : |
| project_expressions()) { |
| const std::vector<expressions::AttributeReferencePtr> referenced_attributes_in_expression = |
| project_expression->getReferencedAttributes(); |
| referenced_attributes.insert(referenced_attributes.end(), |
| referenced_attributes_in_expression.begin(), |
| referenced_attributes_in_expression.end()); |
| } |
| const std::vector<expressions::AttributeReferencePtr> referenced_attributes_in_predicate = |
| join_predicate_->getReferencedAttributes(); |
| referenced_attributes.insert(referenced_attributes.end(), |
| referenced_attributes_in_predicate.begin(), |
| referenced_attributes_in_predicate.end()); |
| return referenced_attributes; |
| } |
| |
| bool NestedLoopsJoin::maybeCopyWithPrunedExpressions( |
| const expressions::UnorderedNamedExpressionSet &referenced_expressions, |
| PhysicalPtr *output) const { |
| std::vector<expressions::NamedExpressionPtr> new_project_expressions; |
| const std::vector<expressions::NamedExpressionPtr> ¤t_project_expressions = |
| project_expressions(); |
| for (const expressions::NamedExpressionPtr &project_expression : |
| current_project_expressions) { |
| if (referenced_expressions.find(project_expression) != |
| referenced_expressions.end()) { |
| new_project_expressions.emplace_back(project_expression); |
| } |
| } |
| if (new_project_expressions.size() != current_project_expressions.size()) { |
| *output = Create(left(), right(), join_predicate_, new_project_expressions); |
| return true; |
| } |
| return false; |
| } |
| |
| void NestedLoopsJoin::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<OptimizerTreeBaseNodePtr> *non_container_child_fields, |
| std::vector<std::string> *container_child_field_names, |
| std::vector<std::vector<OptimizerTreeBaseNodePtr>> *container_child_fields) const { |
| BinaryJoin::getFieldStringItems(inline_field_names, |
| inline_field_values, |
| non_container_child_field_names, |
| non_container_child_fields, |
| container_child_field_names, |
| container_child_fields); |
| non_container_child_field_names->push_back("join_predicate"); |
| non_container_child_fields->push_back(join_predicate_); |
| } |
| |
| } // namespace physical |
| } // namespace optimizer |
| } // namespace quickstep |