Method CopyRows

be/src/exec/select-node-ir.cc:25–43

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;
    }
  }
}