| /** |
| * 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_QUERY_OPTIMIZER_PHYSICAL_SHARED_SUBPLAN_REFERENCE_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_SHARED_SUBPLAN_REFERENCE_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" |
| #include "query_optimizer/physical/Physical.hpp" |
| #include "query_optimizer/physical/PhysicalType.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| namespace optimizer { |
| namespace physical { |
| |
| /** \addtogroup OptimizerPhysical |
| * @{ |
| */ |
| |
| class SharedSubplanReference; |
| typedef std::shared_ptr<const SharedSubplanReference> SharedSubplanReferencePtr; |
| |
| /** |
| * @breif A reference to a shared subplan stored in the TopLevelPlan node. |
| */ |
| class SharedSubplanReference : public physical::Physical { |
| public: |
| PhysicalType getPhysicalType() const override { |
| return PhysicalType::kSharedSubplanReference; |
| } |
| |
| std::string getName() const override { |
| return "SharedSubplanReference"; |
| } |
| |
| /** |
| * @return The ID of the shared subplan. |
| */ |
| int subplan_id() const { |
| return subplan_id_; |
| } |
| |
| /** |
| * @return The attributes from the referenced shared subplan. |
| */ |
| const std::vector<expressions::AttributeReferencePtr>& referenced_attributes() const { |
| return referenced_attributes_; |
| } |
| |
| /** |
| * @return The output attributes of this shared subplan reference. |
| */ |
| const std::vector<expressions::AttributeReferencePtr>& output_attributes() const { |
| return output_attributes_; |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getOutputAttributes() const override { |
| return output_attributes_; |
| } |
| |
| 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<OptimizerTreeBaseNodePtr> *non_container_child_fields, |
| std::vector<std::string> *container_child_field_names, |
| std::vector<std::vector<OptimizerTreeBaseNodePtr>> *container_child_fields) const override; |
| |
| PhysicalPtr copyWithNewChildren(const std::vector<PhysicalPtr> &new_children) const override { |
| DCHECK(new_children.empty()); |
| return Create(subplan_id_, referenced_attributes_, output_attributes_); |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getReferencedAttributes() const override { |
| return referenced_attributes_; |
| } |
| |
| bool maybeCopyWithPrunedExpressions( |
| const expressions::UnorderedNamedExpressionSet &referenced_expressions, |
| PhysicalPtr *output) const override { |
| return false; |
| } |
| |
| /** |
| * @brief Creates a SharedSubplanReference. |
| * |
| * @param subplan_id The ID of the shared subplan, which is the index of |
| * the referenced shared subplan in <shared_subplans_> of the TopLevelPlan. |
| * @param referenced_attributes The attributes from the referenced shared subplan. |
| * @param output_attributes The output attributes of this shared subplan reference. |
| * @return An immutable SharedSubplanReference. |
| */ |
| static SharedSubplanReferencePtr Create( |
| int subplan_id, |
| const std::vector<expressions::AttributeReferencePtr> &referenced_attributes, |
| const std::vector<expressions::AttributeReferencePtr> &output_attributes) { |
| return SharedSubplanReferencePtr( |
| new SharedSubplanReference(subplan_id, referenced_attributes, output_attributes)); |
| } |
| |
| private: |
| SharedSubplanReference(int subplan_id, |
| const std::vector<expressions::AttributeReferencePtr> &referenced_attributes, |
| const std::vector<expressions::AttributeReferencePtr> &output_attributes) |
| : subplan_id_(subplan_id), |
| referenced_attributes_(referenced_attributes), |
| output_attributes_(output_attributes) { |
| DCHECK_EQ(output_attributes_.size(), referenced_attributes_.size()); |
| } |
| |
| int subplan_id_; |
| std::vector<expressions::AttributeReferencePtr> referenced_attributes_; |
| std::vector<expressions::AttributeReferencePtr> output_attributes_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SharedSubplanReference); |
| }; |
| |
| /** @} */ |
| |
| } // namespace physical |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_SHARED_SUBPLAN_REFERENCE_HPP_ */ |