| /** |
| * Copyright 2011-2015 Quickstep Technologies LLC. |
| * Copyright 2015-2016 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_RELATIONAL_OPERATORS_AGGREGATION_OPERATOR_HPP_ |
| #define QUICKSTEP_RELATIONAL_OPERATORS_AGGREGATION_OPERATOR_HPP_ |
| |
| #include <vector> |
| |
| #include "catalog/CatalogRelation.hpp" |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "query_execution/QueryContext.hpp" |
| #include "relational_operators/RelationalOperator.hpp" |
| #include "relational_operators/WorkOrder.hpp" |
| #include "storage/StorageBlockInfo.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 WorkOrdersContainer; |
| |
| /** \addtogroup RelationalOperators |
| * @{ |
| */ |
| |
| /** |
| * @brief An operator which performs aggregation over a relation. |
| **/ |
| class AggregationOperator : public RelationalOperator { |
| public: |
| /** |
| * @brief Constructor for aggregating with arbitrary expressions in projection |
| * list. |
| * |
| * @param input_relation The relation to perform aggregation over. |
| * @param input_relation_is_stored If input_relation is a stored relation and |
| * is fully available to the operator before it can start generating |
| * workorders. |
| * @param aggr_state_index The index of the AggregationState in QueryContext. |
| **/ |
| AggregationOperator(const CatalogRelation &input_relation, |
| bool input_relation_is_stored, |
| const QueryContext::aggregation_state_id aggr_state_index) |
| : input_relation_is_stored_(input_relation_is_stored), |
| input_relation_block_ids_(input_relation_is_stored ? input_relation.getBlocksSnapshot() |
| : std::vector<block_id>()), |
| aggr_state_index_(aggr_state_index), |
| num_workorders_generated_(0), |
| started_(false) {} |
| |
| ~AggregationOperator() override {} |
| |
| bool getAllWorkOrders(WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id foreman_client_id, |
| const tmb::client_id agent_client_id, |
| tmb::MessageBus *bus) override; |
| |
| void feedInputBlock(const block_id input_block_id, const relation_id input_relation_id) override { |
| input_relation_block_ids_.push_back(input_block_id); |
| } |
| |
| void feedInputBlocks(const relation_id rel_id, std::vector<block_id> *partially_filled_blocks) override { |
| input_relation_block_ids_.insert(input_relation_block_ids_.end(), |
| partially_filled_blocks->begin(), |
| partially_filled_blocks->end()); |
| } |
| |
| private: |
| const bool input_relation_is_stored_; |
| std::vector<block_id> input_relation_block_ids_; |
| const QueryContext::aggregation_state_id aggr_state_index_; |
| |
| std::vector<block_id>::size_type num_workorders_generated_; |
| bool started_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AggregationOperator); |
| }; |
| |
| /** |
| * @brief A WorkOrder produced by AggregationOperator. |
| **/ |
| class AggregationWorkOrder : public WorkOrder { |
| public: |
| /** |
| * @brief Constructor |
| * |
| * @param input_block_id The block id. |
| * @param state The AggregationState to use. |
| **/ |
| AggregationWorkOrder(const block_id input_block_id, |
| AggregationOperationState *state) |
| : input_block_id_(input_block_id), |
| state_(DCHECK_NOTNULL(state)) {} |
| |
| ~AggregationWorkOrder() override {} |
| |
| void execute() override; |
| |
| private: |
| const block_id input_block_id_; |
| AggregationOperationState *state_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AggregationWorkOrder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_RELATIONAL_OPERATORS_AGGREGATION_OPERATOR_HPP_ |