| /** |
| * 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_LOGICAL_DELETE_TUPLES_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_DELETE_TUPLES_HPP_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "query_optimizer/OptimizerTree.hpp" |
| #include "query_optimizer/expressions/AttributeReference.hpp" |
| #include "query_optimizer/expressions/Predicate.hpp" |
| #include "query_optimizer/logical/Logical.hpp" |
| #include "query_optimizer/logical/LogicalType.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class CatalogRelation; |
| |
| namespace optimizer { |
| namespace logical { |
| |
| /** \addtogroup OptimizerLogical |
| * @{ |
| */ |
| |
| class DeleteTuples; |
| typedef std::shared_ptr<const DeleteTuples> DeleteTuplesPtr; |
| |
| /** |
| * @brief Deletes tuples on which a predicate <predicate_> is evaluated to true. |
| */ |
| class DeleteTuples : public Logical { |
| public: |
| LogicalType getLogicalType() const override { return LogicalType::kDeleteTuples; } |
| |
| std::string getName() const override { return "DeleteTuples"; } |
| |
| /** |
| * @return The logical node that produces the relation where the DeleteTuples |
| * is applied. |
| */ |
| const LogicalPtr& input() const { return input_; } |
| |
| /** |
| * @return The predicate used to determine whether a tuple should be deleted. |
| */ |
| const expressions::PredicatePtr& predicate() const { return predicate_; } |
| |
| LogicalPtr copyWithNewChildren( |
| const std::vector<LogicalPtr> &new_children) const override { |
| DCHECK_EQ(getNumChildren(), new_children.size()); |
| return Create(new_children[0], predicate_); |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getOutputAttributes() const override { |
| return {}; |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getReferencedAttributes() const override; |
| |
| /** |
| * @brief Creates a DeleteTuples logical node that represents an operation to |
| * delete tuples on which \p predicate is evaluated to true from the |
| * relation output by \p input. |
| * |
| * @param input The logical node that produces the relation where the |
| * DeleteTuples is applied. |
| * @param predicate The predicate used to determine whether a tuple needs to |
| * be deleted. |
| * @return An immutable DeleteTuples node. |
| */ |
| static DeleteTuplesPtr Create(const LogicalPtr &input, |
| const expressions::PredicatePtr &predicate) { |
| return DeleteTuplesPtr(new DeleteTuples(input, predicate)); |
| } |
| |
| 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: |
| DeleteTuples(const LogicalPtr &input, |
| const expressions::PredicatePtr &predicate) |
| : input_(input), predicate_(predicate) { |
| addChild(input_); |
| } |
| |
| LogicalPtr input_; |
| expressions::PredicatePtr predicate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DeleteTuples); |
| }; |
| |
| /** @} */ |
| |
| } // namespace logical |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_LOGICAL_DELETE_TUPLES_HPP_ */ |