| /** |
| * 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_DESTROY_HASH_OPERATOR_HPP_ |
| #define QUICKSTEP_RELATIONAL_OPERATORS_DESTROY_HASH_OPERATOR_HPP_ |
| |
| #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 StorageManager; |
| class WorkOrdersContainer; |
| |
| /** \addtogroup RelationalOperators |
| * @{ |
| */ |
| |
| /** |
| * @brief An operator which destroys a shared hash table. |
| **/ |
| class DestroyHashOperator : public RelationalOperator { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param hash_table_index The index of the JoinHashTable in QueryContext. |
| **/ |
| explicit DestroyHashOperator(const QueryContext::join_hash_table_id hash_table_index) |
| : hash_table_index_(hash_table_index), |
| work_generated_(false) {} |
| |
| ~DestroyHashOperator() override {} |
| |
| bool getAllWorkOrders(WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id foreman_client_id, |
| tmb::MessageBus *bus) override; |
| |
| private: |
| const QueryContext::join_hash_table_id hash_table_index_; |
| bool work_generated_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DestroyHashOperator); |
| }; |
| |
| /** |
| * @brief A WorkOrder produced by DestroyHashOperator. |
| **/ |
| class DestroyHashWorkOrder : public WorkOrder { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param hash_table_index The index of the JoinHashTable in QueryContext. |
| * @param query_context The QueryContext to use. |
| **/ |
| DestroyHashWorkOrder(const QueryContext::join_hash_table_id hash_table_index, |
| QueryContext *query_context) |
| : hash_table_index_(hash_table_index), |
| query_context_(DCHECK_NOTNULL(query_context)) {} |
| |
| ~DestroyHashWorkOrder() override {} |
| |
| void execute() override; |
| |
| private: |
| const QueryContext::join_hash_table_id hash_table_index_; |
| QueryContext *query_context_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DestroyHashWorkOrder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_RELATIONAL_OPERATORS_DESTROY_HASH_OPERATOR_HPP_ |