| /** |
| * 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_RELATIONAL_OPERATORS_INITIALIZE_AGGREGATION_OPERATOR_HPP_ |
| #define QUICKSTEP_RELATIONAL_OPERATORS_INITIALIZE_AGGREGATION_OPERATOR_HPP_ |
| |
| #include <string> |
| |
| #include "query_execution/QueryContext.hpp" |
| #include "relational_operators/RelationalOperator.hpp" |
| #include "relational_operators/WorkOrder.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| #include "tmb/id_typedefs.h" |
| |
| namespace tmb { class MessageBus; } |
| |
| namespace quickstep { |
| |
| class AggregationOperationState; |
| class StorageManager; |
| class WorkOrderProtosContainer; |
| class WorkOrdersContainer; |
| |
| namespace serialization { class WorkOrder; } |
| |
| /** \addtogroup RelationalOperators |
| * @{ |
| */ |
| |
| /** |
| * @brief An operator which initializes an AggregationOperationState. |
| **/ |
| class InitializeAggregationOperator : public RelationalOperator { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param query_id The ID of this query. |
| * @param aggr_state_index The index of the AggregationOperationState in QueryContext. |
| **/ |
| InitializeAggregationOperator(const std::size_t query_id, |
| const QueryContext::aggregation_state_id aggr_state_index) |
| : RelationalOperator(query_id), |
| aggr_state_index_(aggr_state_index), |
| started_(false) {} |
| |
| ~InitializeAggregationOperator() override {} |
| |
| std::string getName() const override { |
| return "InitializeAggregationOperator"; |
| } |
| |
| bool getAllWorkOrders(WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id scheduler_client_id, |
| tmb::MessageBus *bus) override; |
| |
| bool getAllWorkOrderProtos(WorkOrderProtosContainer *container) override; |
| |
| private: |
| const QueryContext::aggregation_state_id aggr_state_index_; |
| bool started_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InitializeAggregationOperator); |
| }; |
| |
| /** |
| * @brief A WorkOrder produced by InitializeAggregationOperator. |
| **/ |
| class InitializeAggregationWorkOrder : public WorkOrder { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param query_id The ID of the query to which this operator belongs. |
| * @param partition_id The partition ID for which the work order is issued. |
| * @param state The AggregationOperationState to be initialized. |
| */ |
| InitializeAggregationWorkOrder(const std::size_t query_id, |
| const std::size_t partition_id, |
| AggregationOperationState *state) |
| : WorkOrder(query_id), |
| partition_id_(partition_id), |
| state_(DCHECK_NOTNULL(state)) {} |
| |
| ~InitializeAggregationWorkOrder() override {} |
| |
| void execute() override; |
| |
| private: |
| const std::size_t partition_id_; |
| |
| AggregationOperationState *state_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InitializeAggregationWorkOrder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_RELATIONAL_OPERATORS_INITIALIZE_AGGREGATION_OPERATOR_HPP_ |