| 42 | } |
| 43 | |
| 44 | Status AggregationNode::Open(RuntimeState* state) { |
| 45 | SCOPED_TIMER(runtime_profile_->total_time_counter()); |
| 46 | ScopedOpenEventAdder ea(this); |
| 47 | // Open the child before consuming resources in this node. |
| 48 | RETURN_IF_ERROR(child(0)->Open(state)); |
| 49 | RETURN_IF_ERROR(ExecNode::Open(state)); |
| 50 | for (auto& agg : aggs_) RETURN_IF_ERROR(agg->Open(state)); |
| 51 | RowBatch child_batch(child(0)->row_desc(), state->batch_size(), mem_tracker()); |
| 52 | |
| 53 | int num_aggs = aggs_.size(); |
| 54 | // Create mini batches. |
| 55 | vector<unique_ptr<RowBatch>> mini_batches; |
| 56 | if (!replicate_input_ && num_aggs > 1) { |
| 57 | for (int i = 0; i < num_aggs; ++i) { |
| 58 | mini_batches.push_back(make_unique<RowBatch>( |
| 59 | child(0)->row_desc(), state->batch_size(), mem_tracker())); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | // Read all the rows from the child and process them. |
| 64 | bool eos = false; |
| 65 | do { |
| 66 | RETURN_IF_CANCELLED(state); |
| 67 | RETURN_IF_ERROR(children_[0]->GetNext(state, &child_batch, &eos)); |
| 68 | |
| 69 | if (num_aggs == 1) { |
| 70 | RETURN_IF_ERROR(aggs_[0]->AddBatch(state, &child_batch)); |
| 71 | child_batch.Reset(); |
| 72 | if (fast_limit_check_) { |
| 73 | DCHECK(limit() > -1); |
| 74 | if (aggs_[0]->GetNumKeys() >= limit()) { |
| 75 | eos = true; |
| 76 | runtime_profile_->AddInfoString("FastLimitCheckExceededRows", |
| 77 | SimpleItoa(aggs_[0]->GetNumKeys() - limit())); |
| 78 | VLOG_QUERY << Substitute("the number of rows ($0) returned from the " |
| 79 | "aggregation node has exceeded the limit of $1", aggs_[0]->GetNumKeys(), |
| 80 | limit()); |
| 81 | break; |
| 82 | } |
| 83 | } |
| 84 | continue; |
| 85 | } |
| 86 | |
| 87 | if (replicate_input_) { |
| 88 | for (auto& agg : aggs_) RETURN_IF_ERROR(agg->AddBatch(state, &child_batch)); |
| 89 | child_batch.Reset(); |
| 90 | continue; |
| 91 | } |
| 92 | |
| 93 | // Separate input batch into mini batches destined for the different aggs. |
| 94 | int num_tuples = child(0)->row_desc()->tuple_descriptors().size(); |
| 95 | DCHECK_EQ(num_aggs, num_tuples); |
| 96 | int num_rows = child_batch.num_rows(); |
| 97 | if (num_rows > 0) { |
| 98 | RETURN_IF_ERROR(SplitMiniBatches(&child_batch, &mini_batches)); |
| 99 | |
| 100 | for (int i = 0; i < num_tuples; ++i) { |
| 101 | RowBatch* mini_batch = mini_batches[i].get(); |
nothing calls this directly
no test coverage detected