Github user cramja commented on a diff in the pull request: https://github.com/apache/incubator-quickstep/pull/234#discussion_r112333371 --- Diff: relational_operators/UnionAllOperator.cpp --- @@ -128,14 +128,56 @@ bool UnionAllOperator::getAllWorkOrders( } bool UnionAllOperator::getAllWorkOrderProtos(WorkOrderProtosContainer* container) { - // TODO(tianrun): Add protobuf for UnionAllWorkOrder to support distributed mode. - LOG(FATAL) << "UnionAllOperator is not supported in distributed mode yet."; - return true; + if (!stored_generated_) { + for (std::size_t relation_index = 0; relation_index < input_relations_.size(); ++relation_index) { + if (input_relations_are_stored_[relation_index]) { + const std::vector<block_id> &all_blocks = input_relations_block_ids_[relation_index]; + const relation_id relation = input_relations_[relation_index]->getID(); + const std::vector<attribute_id> &attributes = select_attribute_ids_[relation_index]; + for (const block_id block : all_blocks) { + container->addWorkOrderProto(createWorkOrderProto(block, relation, attributes), op_index_); + } + } + } + stored_generated_ = true; + } + + for (std::size_t relation_index = 0; relation_index < input_relations_.size(); ++relation_index) { + if (!input_relations_are_stored_[relation_index]) { + const std::vector<block_id> &all_blocks = input_relations_block_ids_[relation_index]; + std::size_t num_generated = num_workorders_generated_[relation_index]; + const relation_id relation = input_relations_[relation_index]->getID(); + const std::vector<attribute_id> &attributes = select_attribute_ids_[relation_index]; + while (num_generated < all_blocks.size()) { + container->addWorkOrderProto(createWorkOrderProto(all_blocks[num_generated], relation, attributes), op_index_); + ++num_generated; + } + num_workorders_generated_[relation_index] = num_generated; + } + } + return stored_generated_ && done_feeding_input_relation_; --- End diff -- Is `stored_generated_ && ...` redundant, as it will always be true here?
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