| /** |
| * 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_PREDICATE_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_PREDICATE_HPP_ |
| |
| #include <memory> |
| #include <unordered_map> |
| |
| #include "query_optimizer/expressions/ExprId.hpp" |
| #include "query_optimizer/expressions/Expression.hpp" |
| #include "types/Type.hpp" |
| #include "types/TypeFactory.hpp" |
| #include "utility/Macros.hpp" |
| |
| namespace quickstep { |
| |
| class CatalogAttribute; |
| class Predicate; |
| |
| namespace optimizer { |
| namespace expressions { |
| |
| /** \addtogroup OptimizerExpressions |
| * @{ |
| */ |
| |
| class Predicate; |
| typedef std::shared_ptr<const Predicate> PredicatePtr; |
| |
| /** |
| * @brief Expression that returns boolean values. |
| */ |
| class Predicate : public Expression { |
| public: |
| /** |
| * @brief Destructor. |
| */ |
| ~Predicate() override {} |
| |
| const Type& getValueType() const override { |
| // The type system does not have a bool type, so we use non-nullable kInt |
| // instead. |
| return TypeFactory::GetType(kInt /* TypeID */, |
| false /* nullable */); |
| } |
| |
| /** |
| * @brief Returns a concretized predicate in the Quickstep execution |
| * expression system with AttributeReferences replaced by |
| * CatalogAttribute references provided in \p substitution_map. |
| * @note In the Quickstep execution expression system, Predicate is not Scalar |
| *type. We do not use concretize() for predicate concretization. |
| * |
| * @param substitution_map Map from ExprId to CatalogAttribute for use in |
| * replacing AttributeReference. |
| * @return A concretized predicate for evaluation. |
| */ |
| virtual ::quickstep::Predicate* concretize( |
| const std::unordered_map<ExprId, const CatalogAttribute*>& substitution_map) const = 0; |
| |
| protected: |
| Predicate() {} |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Predicate); |
| }; |
| |
| /** @} */ |
| |
| } // namespace expressions |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_PREDICATE_HPP_ */ |