| /** |
| * Copyright 2011-2015 Quickstep Technologies LLC. |
| * Copyright 2015 Pivotal Software, Inc. |
| * |
| * Licensed 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_UPDATETABLE_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_UPDATETABLE_HPP_ |
| |
| #include <memory> |
| #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/expressions/Predicate.hpp" |
| #include "query_optimizer/expressions/Scalar.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 UpdateTable; |
| typedef std::shared_ptr<const UpdateTable> UpdateTablePtr; |
| |
| /** |
| * @brief Updates a relation with new assignments to some tuples. |
| */ |
| class UpdateTable : public Physical { |
| public: |
| PhysicalType getPhysicalType() const override { |
| return PhysicalType::kUpdateTable; |
| } |
| |
| std::string getName() const override { return "UpdateTable"; } |
| |
| /** |
| * @return The logical node that creates the table to be updated. |
| */ |
| const PhysicalPtr& input() const { return input_; } |
| |
| /** |
| * @return The attributes to be assigned values to. |
| */ |
| const std::vector<expressions::AttributeReferencePtr>& assignees() const { |
| return assignees_; |
| } |
| |
| /** |
| * @return The expressions for which the values are assigned. |
| */ |
| const std::vector<expressions::ScalarPtr>& assignment_expressions() const { |
| return assignment_expressions_; |
| } |
| |
| /** |
| * @return The predicate to select tuples to be updated. |
| */ |
| const expressions::PredicatePtr& predicate() const { return predicate_; } |
| |
| PhysicalPtr copyWithNewChildren( |
| const std::vector<PhysicalPtr> &new_children) const override { |
| DCHECK_EQ(getNumChildren(), new_children.size()); |
| return Create(new_children[0], assignees_, assignment_expressions_, |
| predicate_); |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getOutputAttributes() const override { |
| return std::vector<expressions::AttributeReferencePtr>(); |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getReferencedAttributes() const override; |
| |
| bool maybeCopyWithPrunedExpressions( |
| const expressions::UnorderedNamedExpressionSet &referenced_expressions, |
| PhysicalPtr *output) const override { |
| return false; |
| } |
| |
| /** |
| * @brief Creates an UpdateTable physical node that represents an operation to |
| * update a table with given assignments. |
| * |
| * @param input The input gives the table to be updated. |
| * @param assignees The attribute list to assign values to. |
| * @param assignment_expressions The expressions that gives the values to be |
| * assigned. |
| * @param predicate The predicate to select tuples to be updated. |
| * @return An immutable UpdateTable node. |
| */ |
| static UpdateTablePtr Create( |
| const PhysicalPtr &input, |
| const std::vector<expressions::AttributeReferencePtr> &assignees, |
| const std::vector<expressions::ScalarPtr> &assignment_expressions, |
| const expressions::PredicatePtr &predicate) { |
| return UpdateTablePtr( |
| new UpdateTable(input, assignees, assignment_expressions, 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: |
| UpdateTable(const PhysicalPtr &input, |
| const std::vector<expressions::AttributeReferencePtr> &assignees, |
| const std::vector<expressions::ScalarPtr> &assignment_expressions, |
| const expressions::PredicatePtr &predicate) |
| : input_(input), |
| assignees_(assignees), |
| assignment_expressions_(assignment_expressions), |
| predicate_(predicate) { |
| addChild(input); |
| } |
| |
| PhysicalPtr input_; |
| // The attributes to be assigned values to. |
| std::vector<expressions::AttributeReferencePtr> assignees_; |
| // The expressions for which the values are assigned. Has 1:1 matching with |
| // <assignees_>. |
| std::vector<expressions::ScalarPtr> assignment_expressions_; |
| expressions::PredicatePtr predicate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(UpdateTable); |
| }; |
| |
| /** @} */ |
| |
| } // namespace physical |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_PHYSICAL_UPDATETABLE_HPP_ */ |