| /** |
| * 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_EXPRESSIONS_AGGREGATION_AGGREGATE_FUNCTION_SUM_HPP_ |
| #define QUICKSTEP_EXPRESSIONS_AGGREGATION_AGGREGATE_FUNCTION_SUM_HPP_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "expressions/aggregation/AggregateFunction.hpp" |
| #include "expressions/aggregation/AggregationID.hpp" |
| #include "utility/Macros.hpp" |
| |
| namespace quickstep { |
| |
| class AggregationHandle; |
| class Type; |
| |
| /** \addtogroup Expressions |
| * @{ |
| */ |
| |
| /** |
| * @brief AggregateFunction representing SQL SUM. |
| **/ |
| class AggregateFunctionSum : public AggregateFunction { |
| public: |
| static const AggregateFunctionSum& Instance() { |
| static AggregateFunctionSum instance; |
| return instance; |
| } |
| |
| std::string getName() const override { |
| return "SUM"; |
| } |
| |
| bool canApplyToTypes( |
| const std::vector<const Type*> &argument_types) const override; |
| |
| const Type* resultTypeForArgumentTypes( |
| const std::vector<const Type*> &argument_types) const override; |
| |
| AggregationHandle* createHandle( |
| const std::vector<const Type*> &argument_types) const override; |
| |
| private: |
| AggregateFunctionSum() |
| : AggregateFunction(AggregationID::kSum) { |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(AggregateFunctionSum); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_EXPRESSIONS_AGGREGATION_AGGREGATE_FUNCTION_SUM_HPP_ |