| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 "exec/select-node.h" |
| #include "runtime/tuple-row.h" |
| |
| using namespace impala; |
| |
| void SelectNode::CopyRows(RowBatch* output_batch) { |
| ScalarExprEvaluator* const* conjunct_evals = conjunct_evals_.data(); |
| int num_conjuncts = conjuncts_.size(); |
| DCHECK_EQ(num_conjuncts, conjunct_evals_.size()); |
| |
| FOREACH_ROW(child_row_batch_.get(), child_row_idx_, batch_iter) { |
| // Add a new row to output_batch |
| int dst_row_idx = output_batch->AddRow(); |
| TupleRow* dst_row = output_batch->GetRow(dst_row_idx); |
| TupleRow* src_row = batch_iter.Get(); |
| ++child_row_idx_; |
| if (EvalConjuncts(conjunct_evals, num_conjuncts, src_row)) { |
| output_batch->CopyRow(src_row, dst_row); |
| output_batch->CommitLastRow(); |
| IncrementNumRowsReturned(1); |
| if (ReachedLimit() || output_batch->AtCapacity()) return; |
| } |
| } |
| } |