| /** |
| * 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_EXPRESSIONS_AGGREGATION_AGGREGATION_HANDLE_SUM_HPP_ |
| #define QUICKSTEP_EXPRESSIONS_AGGREGATION_AGGREGATION_HANDLE_SUM_HPP_ |
| |
| #include <cstddef> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "expressions/aggregation/AggregationHandle.hpp" |
| #include "storage/HashTableBase.hpp" |
| #include "threading/SpinMutex.hpp" |
| #include "types/Type.hpp" |
| #include "types/TypedValue.hpp" |
| #include "types/operations/binary_operations/BinaryOperation.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class ColumnVector; |
| class StorageManager; |
| class ValueAccessor; |
| |
| /** \addtogroup Expressions |
| * @{ |
| */ |
| |
| /** |
| * @brief Aggregation state for sum. |
| */ |
| class AggregationStateSum : public AggregationState { |
| public: |
| /** |
| * @brief Copy constructor (ignores mutex). |
| */ |
| AggregationStateSum(const AggregationStateSum &orig) |
| : sum_(orig.sum_), |
| null_(orig.null_) { |
| } |
| |
| private: |
| friend class AggregationHandleSum; |
| |
| AggregationStateSum() |
| : sum_(0), null_(true) { |
| } |
| |
| AggregationStateSum(TypedValue &&sum, const bool is_null) |
| : sum_(std::move(sum)), null_(is_null) { |
| } |
| |
| // TODO(shoban): We might want to specialize sum_ to use atomics for int types |
| // similar to in AggregationStateCount. |
| TypedValue sum_; |
| bool null_; |
| SpinMutex mutex_; |
| }; |
| |
| /** |
| * @brief An aggregationhandle for sum. |
| **/ |
| class AggregationHandleSum : public AggregationHandle { |
| public: |
| ~AggregationHandleSum() override { |
| } |
| |
| AggregationState* createInitialState() const override { |
| return new AggregationStateSum(blank_state_); |
| } |
| |
| AggregationStateHashTableBase* createGroupByHashTable( |
| const HashTableImplType hash_table_impl, |
| const std::vector<const Type*> &group_by_types, |
| const std::size_t estimated_num_groups, |
| StorageManager *storage_manager) const override; |
| |
| inline void iterateUnaryInl(AggregationStateSum *state, const TypedValue &value) const { |
| DCHECK(value.isPlausibleInstanceOf(argument_type_.getSignature())); |
| if (value.isNull()) return; |
| |
| SpinMutexLock lock(state->mutex_); |
| state->sum_ = fast_operator_->applyToTypedValues(state->sum_, value); |
| state->null_ = false; |
| } |
| |
| AggregationState* accumulateColumnVectors( |
| const std::vector<std::unique_ptr<ColumnVector>> &column_vectors) const override; |
| |
| #ifdef QUICKSTEP_ENABLE_VECTOR_COPY_ELISION_SELECTION |
| AggregationState* accumulateValueAccessor( |
| ValueAccessor *accessor, |
| const std::vector<attribute_id> &accessor_id) const override; |
| #endif |
| |
| void aggregateValueAccessorIntoHashTable( |
| ValueAccessor *accessor, |
| const std::vector<attribute_id> &argument_ids, |
| const std::vector<attribute_id> &group_by_key_ids, |
| AggregationStateHashTableBase *hash_table) const override; |
| |
| void mergeStates(const AggregationState &source, |
| AggregationState *destination) const override; |
| |
| TypedValue finalize(const AggregationState &state) const override; |
| |
| inline TypedValue finalizeHashTableEntry(const AggregationState &state) const { |
| return static_cast<const AggregationStateSum&>(state).sum_; |
| } |
| |
| ColumnVector* finalizeHashTable( |
| const AggregationStateHashTableBase &hash_table, |
| std::vector<std::vector<TypedValue>> *group_by_keys) const override; |
| |
| private: |
| friend class AggregateFunctionSum; |
| |
| /** |
| * @brief Initialize handle for type. |
| * |
| * @param type Type of the sum value. |
| **/ |
| explicit AggregationHandleSum(const Type &type); |
| |
| const Type &argument_type_; |
| const Type *result_type_; |
| AggregationStateSum blank_state_; |
| std::unique_ptr<UncheckedBinaryOperator> fast_operator_; |
| std::unique_ptr<UncheckedBinaryOperator> merge_operator_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AggregationHandleSum); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_EXPRESSIONS_AGGREGATION_AGGREGATION_HANDLE_SUM_HPP_ |