| /** |
| * 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_BUILD_HASH_OPERATOR_HPP_ |
| #define QUICKSTEP_RELATIONAL_OPERATORS_BUILD_HASH_OPERATOR_HPP_ |
| |
| #include <utility> |
| #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 CatalogRelationSchema; |
| class StorageManager; |
| class WorkOrdersContainer; |
| |
| struct TupleReference; |
| |
| template <typename, bool, bool, bool, bool> class HashTable; |
| typedef HashTable<TupleReference, true, false, false, true> JoinHashTable; |
| |
| /** \addtogroup RelationalOperators |
| * @{ |
| */ |
| |
| /** |
| * @brief An operator which builds a shared hash table on one |
| * relation. |
| **/ |
| class BuildHashOperator : public RelationalOperator { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param input_relation The relation to build hash table on. |
| * @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 join_key_attributes The IDs of equijoin attributes in |
| * input_relation. |
| * @param any_join_key_attributes_nullable If any attribute is nullable. |
| * @param hash_table_index The index of the JoinHashTable in QueryContext. |
| * The HashTable's key Type(s) should be the Type(s) of the |
| * join_key_attributes in input_relation. |
| **/ |
| BuildHashOperator(const CatalogRelation &input_relation, |
| const bool input_relation_is_stored, |
| const std::vector<attribute_id> &join_key_attributes, |
| const bool any_join_key_attributes_nullable, |
| const QueryContext::join_hash_table_id hash_table_index) |
| : input_relation_(input_relation), |
| input_relation_is_stored_(input_relation_is_stored), |
| join_key_attributes_(join_key_attributes), |
| any_join_key_attributes_nullable_(any_join_key_attributes_nullable), |
| hash_table_index_(hash_table_index), |
| input_relation_block_ids_(input_relation_is_stored ? input_relation.getBlocksSnapshot() |
| : std::vector<block_id>()), |
| num_workorders_generated_(0), |
| started_(false) {} |
| |
| ~BuildHashOperator() override {} |
| |
| bool getAllWorkOrders(WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id scheduler_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 CatalogRelation &input_relation_; |
| const bool input_relation_is_stored_; |
| const std::vector<attribute_id> join_key_attributes_; |
| const bool any_join_key_attributes_nullable_; |
| const QueryContext::join_hash_table_id hash_table_index_; |
| |
| std::vector<block_id> input_relation_block_ids_; |
| std::vector<block_id>::size_type num_workorders_generated_; |
| |
| bool started_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BuildHashOperator); |
| }; |
| |
| /** |
| * @brief A WorkOrder produced by BuildHashOperator |
| **/ |
| class BuildHashWorkOrder : public WorkOrder { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param input_relation The relation to build hash table on. |
| * @param join_key_attributes The IDs of equijoin attributes in |
| * input_relation. |
| * @param any_join_key_attributes_nullable If any attribute is nullable. |
| * @param build_block_id The block id. |
| * @param hash_table The JoinHashTable to use. |
| * @param storage_manager The StorageManager to use. |
| **/ |
| BuildHashWorkOrder(const CatalogRelationSchema &input_relation, |
| const std::vector<attribute_id> &join_key_attributes, |
| const bool any_join_key_attributes_nullable, |
| const block_id build_block_id, |
| JoinHashTable *hash_table, |
| StorageManager *storage_manager) |
| : input_relation_(input_relation), |
| join_key_attributes_(join_key_attributes), |
| any_join_key_attributes_nullable_(any_join_key_attributes_nullable), |
| build_block_id_(build_block_id), |
| hash_table_(DCHECK_NOTNULL(hash_table)), |
| storage_manager_(DCHECK_NOTNULL(storage_manager)) {} |
| |
| /** |
| * @brief Constructor for the distributed version. |
| * |
| * @param input_relation The relation to build hash table on. |
| * @param join_key_attributes The IDs of equijoin attributes in |
| * input_relation. |
| * @param any_join_key_attributes_nullable If any attribute is nullable. |
| * @param build_block_id The block id. |
| * @param hash_table The JoinHashTable to use. |
| * @param storage_manager The StorageManager to use. |
| **/ |
| BuildHashWorkOrder(const CatalogRelationSchema &input_relation, |
| std::vector<attribute_id> &&join_key_attributes, |
| const bool any_join_key_attributes_nullable, |
| const block_id build_block_id, |
| JoinHashTable *hash_table, |
| StorageManager *storage_manager) |
| : input_relation_(input_relation), |
| join_key_attributes_(std::move(join_key_attributes)), |
| any_join_key_attributes_nullable_(any_join_key_attributes_nullable), |
| build_block_id_(build_block_id), |
| hash_table_(DCHECK_NOTNULL(hash_table)), |
| storage_manager_(DCHECK_NOTNULL(storage_manager)) {} |
| |
| ~BuildHashWorkOrder() override {} |
| |
| void execute() override; |
| |
| private: |
| const CatalogRelationSchema &input_relation_; |
| const std::vector<attribute_id> join_key_attributes_; |
| const bool any_join_key_attributes_nullable_; |
| const block_id build_block_id_; |
| |
| JoinHashTable *hash_table_; |
| StorageManager *storage_manager_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BuildHashWorkOrder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_RELATIONAL_OPERATORS_BUILD_HASH_OPERATOR_HPP_ |