| /** |
| * 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. |
| **/ |
| |
| #include "relational_operators/SelectOperator.hpp" |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "query_execution/QueryContext.hpp" |
| #include "query_execution/WorkOrdersContainer.hpp" |
| #include "storage/InsertDestination.hpp" |
| #include "storage/StorageBlock.hpp" |
| #include "storage/StorageBlockInfo.hpp" |
| #include "storage/StorageManager.hpp" |
| |
| #include "glog/logging.h" |
| |
| #include "tmb/id_typedefs.h" |
| |
| namespace quickstep { |
| |
| class Predicate; |
| |
| bool SelectOperator::getAllWorkOrders( |
| WorkOrdersContainer *container, |
| QueryContext *query_context, |
| StorageManager *storage_manager, |
| const tmb::client_id foreman_client_id, |
| tmb::MessageBus *bus) { |
| DCHECK(query_context != nullptr); |
| |
| const Predicate *predicate = |
| query_context->getPredicate(predicate_index_); |
| const std::vector<std::unique_ptr<const Scalar>> *selection = |
| simple_projection_ |
| ? nullptr |
| : &query_context->getScalarGroup(selection_index_); |
| InsertDestination *output_destination = |
| query_context->getInsertDestination(output_destination_index_); |
| |
| if (input_relation_is_stored_) { |
| if (!started_) { |
| for (const block_id input_block_id : input_relation_block_ids_) { |
| container->addNormalWorkOrder( |
| new SelectWorkOrder(input_relation_, |
| input_block_id, |
| predicate, |
| simple_projection_, |
| *simple_selection_, |
| selection, |
| output_destination, |
| storage_manager), |
| op_index_); |
| } |
| started_ = true; |
| } |
| return started_; |
| } else { |
| while (num_workorders_generated_ < input_relation_block_ids_.size()) { |
| container->addNormalWorkOrder( |
| new SelectWorkOrder( |
| input_relation_, |
| input_relation_block_ids_[num_workorders_generated_], |
| predicate, |
| simple_projection_, |
| *simple_selection_, |
| selection, |
| output_destination, |
| storage_manager), |
| op_index_); |
| ++num_workorders_generated_; |
| } |
| return done_feeding_input_relation_; |
| } |
| } |
| |
| void SelectWorkOrder::execute() { |
| BlockReference block( |
| storage_manager_->getBlock(input_block_id_, input_relation_)); |
| |
| if (simple_projection_) { |
| block->selectSimple(simple_selection_, |
| predicate_, |
| output_destination_); |
| } else { |
| block->select(*selection_, |
| predicate_, |
| output_destination_); |
| } |
| } |
| |
| } // namespace quickstep |