| /** |
| * 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_WINDOW_AGGREGATE_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_WINDOW_AGGREGATE_HPP_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "query_optimizer/OptimizerTree.hpp" |
| #include "query_optimizer/expressions/Alias.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 OptimizerLogical |
| * @{ |
| */ |
| |
| class WindowAggregate; |
| typedef std::shared_ptr<const WindowAggregate> WindowAggregatePtr; |
| |
| /** |
| * @brief Window Aggregate operator that computes window aggregate expressions. |
| */ |
| class WindowAggregate : public Physical { |
| public: |
| PhysicalType getPhysicalType() const override { |
| return PhysicalType::kWindowAggregate; |
| } |
| |
| std::string getName() const override { return "WindowAggregate"; } |
| |
| /** |
| * @return The input physical node. |
| */ |
| const PhysicalPtr input() const { return input_; } |
| |
| /** |
| * @return Window aggregate expression. |
| */ |
| inline const expressions::AliasPtr window_aggregate_expression() const { |
| return window_aggregate_expression_; |
| } |
| |
| PhysicalPtr copyWithNewChildren( |
| const std::vector<PhysicalPtr> &new_children) const override { |
| DCHECK_EQ(getNumChildren(), new_children.size()); |
| return Create(new_children[0], window_aggregate_expression_); |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getOutputAttributes() const override; |
| |
| std::vector<expressions::AttributeReferencePtr> getReferencedAttributes() const override; |
| |
| bool maybeCopyWithPrunedExpressions( |
| const expressions::UnorderedNamedExpressionSet &referenced_expressions, |
| PhysicalPtr *output) const override { |
| // The project expressions for an WindowAggregate cannot be changed. |
| return false; |
| } |
| |
| /** |
| * @brief Creates an WindowAggregate physical node. |
| * |
| * @param input The input node. |
| * @param window_aggregate_expression The window aggregate expression. |
| * @return An immutable WindowAggregate node. |
| */ |
| static WindowAggregatePtr Create( |
| const PhysicalPtr &input, |
| const expressions::AliasPtr &window_aggregate_expression) { |
| return WindowAggregatePtr(new WindowAggregate(input, |
| window_aggregate_expression)); |
| } |
| |
| 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<OptimizerTreeBaseNodePtr> *non_container_child_fields, |
| std::vector<std::string> *container_child_field_names, |
| std::vector<std::vector<OptimizerTreeBaseNodePtr>> *container_child_fields) const override; |
| |
| private: |
| WindowAggregate( |
| const PhysicalPtr &input, |
| const expressions::AliasPtr &window_aggregate_expression) |
| : input_(input), |
| window_aggregate_expression_(window_aggregate_expression) { |
| addChild(input_); |
| } |
| |
| const PhysicalPtr input_; |
| const expressions::AliasPtr window_aggregate_expression_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WindowAggregate); |
| }; |
| |
| /** @} */ |
| |
| } // namespace physical |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_WINDOW_AGGREGATE_HPP_ |