| /** |
| * 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_UPDATE_OPERATOR_HPP_ |
| #define QUICKSTEP_RELATIONAL_OPERATORS_UPDATE_OPERATOR_HPP_ |
| |
| #include <cstddef> |
| #include <memory> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "catalog/CatalogRelation.hpp" |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "query_execution/QueryContext.hpp" |
| #include "query_execution/QueryExecutionTypedefs.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 CatalogRelationSchema; |
| class InsertDestination; |
| class Predicate; |
| class Scalar; |
| class StorageManager; |
| class WorkOrdersContainer; |
| |
| /** \addtogroup RelationalOperators |
| * @{ |
| */ |
| |
| /** |
| * @note We assume that UpdateOperator won't have dependencies in the query plan |
| * DAG. Thus it will have all the input that it needs before execution. |
| * If at all in the future, if UpdateOperator has dependencies, we can |
| * follow similar arrangement as in SelectOperator. |
| **/ |
| class UpdateOperator : public RelationalOperator { |
| public: |
| /** |
| * @brief Constructor |
| * |
| * @param relation The relation to perform the UPDATE over. |
| * @param relocation_destination_index The index of the InsertDestination in |
| * the QueryContext to relocate tuples which can not be updated |
| * in-place. |
| * @param predicate_index The index of predicate in QueryContext. All tuples |
| * matching pred will be updated (or kInvalidPredicateId to update all |
| * tuples). |
| * @param update_group_index The index of a update group (the map of |
| * attribute_ids to Scalars) which should be evaluated to get the new |
| * value for the corresponding attribute. |
| * |
| * @warning The constructed InsertDestination should belong to relation, but |
| * must NOT contain any pre-existing blocks. |
| **/ |
| UpdateOperator(const CatalogRelation &relation, |
| const QueryContext::insert_destination_id relocation_destination_index, |
| const QueryContext::predicate_id predicate_index, |
| const QueryContext::update_group_id update_group_index) |
| : relation_(relation), |
| relocation_destination_index_(relocation_destination_index), |
| predicate_index_(predicate_index), |
| update_group_index_(update_group_index), |
| input_blocks_(relation.getBlocksSnapshot()), |
| started_(false) {} |
| |
| ~UpdateOperator() override {} |
| |
| bool getAllWorkOrders(WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id foreman_client_id, |
| tmb::MessageBus *bus) override; |
| |
| QueryContext::insert_destination_id getInsertDestinationID() const override { |
| return relocation_destination_index_; |
| } |
| |
| const relation_id getOutputRelationID() const override { |
| return relation_.getID(); |
| } |
| |
| private: |
| const CatalogRelation &relation_; |
| const QueryContext::insert_destination_id relocation_destination_index_; |
| const QueryContext::predicate_id predicate_index_; |
| const QueryContext::update_group_id update_group_index_; |
| |
| const std::vector<block_id> input_blocks_; |
| |
| bool started_; |
| |
| DISALLOW_COPY_AND_ASSIGN(UpdateOperator); |
| }; |
| |
| /** |
| * @brief A WorkOrder produced by UpdateOperator. |
| **/ |
| class UpdateWorkOrder : public WorkOrder { |
| public: |
| /** |
| * @brief Constructor |
| * |
| * @param relation The relation to perform the UPDATE over. |
| * @param predicate All tuples matching \c predicate will be updated (or NULL |
| * to update all tuples). |
| * @param assignments The assignments (the map of attribute_ids to Scalars) |
| * which should be evaluated to get the new value for the corresponding |
| * attribute. |
| * @param input_block_id The block id. |
| * @param relocation_destination The InsertDestination to relocate tuples |
| * which can not be updated in-place. |
| * @param storage_manager The StorageManager to use. |
| * @param update_operator_index The index of the Update Operator in the query |
| * plan DAG. |
| * @param foreman_input_queue The input queue in Foreman. |
| * @param bus A pointer to the TMB. |
| **/ |
| UpdateWorkOrder(const CatalogRelationSchema &relation, |
| const block_id input_block_id, |
| const Predicate *predicate, |
| const std::unordered_map<attribute_id, std::unique_ptr<const Scalar>> &assignments, |
| InsertDestination *relocation_destination, |
| StorageManager *storage_manager, |
| const std::size_t update_operator_index, |
| const tmb::client_id foreman_client_id, |
| MessageBus *bus) |
| : relation_(relation), |
| input_block_id_(input_block_id), |
| predicate_(predicate), |
| assignments_(assignments), |
| relocation_destination_(DCHECK_NOTNULL(relocation_destination)), |
| storage_manager_(DCHECK_NOTNULL(storage_manager)), |
| update_operator_index_(update_operator_index), |
| foreman_client_id_(foreman_client_id), |
| bus_(DCHECK_NOTNULL(bus)) {} |
| |
| ~UpdateWorkOrder() override {} |
| |
| void execute() override; |
| |
| private: |
| const CatalogRelationSchema &relation_; |
| const block_id input_block_id_; |
| const Predicate *predicate_; |
| const std::unordered_map<attribute_id, std::unique_ptr<const Scalar>> &assignments_; |
| |
| InsertDestination *relocation_destination_; |
| StorageManager *storage_manager_; |
| |
| const std::size_t update_operator_index_; |
| const tmb::client_id foreman_client_id_; |
| MessageBus *bus_; |
| |
| DISALLOW_COPY_AND_ASSIGN(UpdateWorkOrder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_RELATIONAL_OPERATORS_UPDATE_OPERATOR_HPP_ |