| /** |
| * 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_EXPRESSIONS_IN_TABLE_QUERY_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_IN_TABLE_QUERY_HPP_ |
| |
| #include <memory> |
| #include <string> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "query_optimizer/OptimizerTree.hpp" |
| #include "query_optimizer/expressions/AttributeReference.hpp" |
| #include "query_optimizer/expressions/ExprId.hpp" |
| #include "query_optimizer/expressions/Expression.hpp" |
| #include "query_optimizer/expressions/ExpressionType.hpp" |
| #include "query_optimizer/expressions/Predicate.hpp" |
| #include "query_optimizer/expressions/Scalar.hpp" |
| #include "query_optimizer/expressions/SubqueryExpression.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class CatalogAttribute; |
| class Predicate; |
| |
| namespace optimizer { |
| namespace expressions { |
| |
| /** \addtogroup OptimizerExpressions |
| * @{ |
| */ |
| |
| class InTableQuery; |
| typedef std::shared_ptr<const InTableQuery> InTableQueryPtr; |
| |
| /** |
| * @brief IN predicate with a subquery. |
| */ |
| class InTableQuery : public Predicate { |
| public: |
| ExpressionType getExpressionType() const override { |
| return ExpressionType::kInTableQuery; |
| } |
| |
| std::string getName() const override { |
| return "InTableQuery"; |
| } |
| |
| bool isConstant() const override { |
| return false; |
| } |
| |
| /** |
| * @return The expression to test with the result of the table subquery. |
| */ |
| const ScalarPtr& test_expression() const { |
| return test_expression_; |
| } |
| |
| /** |
| * @return The table subquery that returns a single column to search for |
| * the value of the test expression. |
| */ |
| const SubqueryExpressionPtr& table_query() const { |
| return table_query_; |
| } |
| |
| ExpressionPtr copyWithNewChildren( |
| const std::vector<ExpressionPtr> &new_children) const override { |
| DCHECK_EQ(2u, new_children.size()); |
| return Create(std::static_pointer_cast<const Scalar>(new_children[0]), |
| std::static_pointer_cast<const SubqueryExpression>(new_children[1])); |
| } |
| |
| std::vector<AttributeReferencePtr> getReferencedAttributes() const override { |
| return {}; |
| } |
| |
| ::quickstep::Predicate* concretize( |
| const std::unordered_map<ExprId, const CatalogAttribute*> &substitution_map) const override; |
| |
| /** |
| * @brief Create an IN predicate with a subquery. |
| * |
| * @param test_expression The expression to test with the result of a table subquery. |
| * @param table_query The table subquery that returns a single column to search for |
| * the value of the test expression. |
| * |
| * @return An immutable IN predicate node. |
| */ |
| static InTableQueryPtr Create(const ScalarPtr &test_expression, |
| const SubqueryExpressionPtr &table_query) { |
| return InTableQueryPtr(new InTableQuery(test_expression, table_query)); |
| } |
| |
| 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: |
| InTableQuery(const ScalarPtr &test_expression, |
| const SubqueryExpressionPtr &table_query) |
| : test_expression_(test_expression), |
| table_query_(table_query) { |
| addChild(test_expression_); |
| addChild(table_query_); |
| } |
| |
| ScalarPtr test_expression_; |
| SubqueryExpressionPtr table_query_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InTableQuery); |
| }; |
| |
| /** @} */ |
| |
| } // namespace expressions |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_IN_TABLE_QUERY_HPP_ |