cyb70289 commented on a change in pull request #8920:
URL: https://github.com/apache/arrow/pull/8920#discussion_r543104759
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File path: cpp/src/arrow/compute/exec.cc
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@@ -721,19 +720,15 @@ class VectorExecutor : public
KernelExecutorImpl<VectorKernel> {
const std::vector<Datum>& outputs) override {
// If execution yielded multiple chunks (because large arrays were split
// based on the ExecContext parameters, then the result is a ChunkedArray
- if (kernel_->output_chunked) {
- if (HaveChunkedArray(inputs) || outputs.size() > 1) {
- return ToChunkedArray(outputs, output_descr_.type);
- } else if (outputs.size() == 1) {
- // Outputs have just one element
- return outputs[0];
- } else {
- // XXX: In the case where no outputs are omitted, is returning a
0-length
- // array always the correct move?
- return MakeArrayOfNull(output_descr_.type, /*length=*/0).ValueOrDie();
- }
- } else {
+ if (kernel_->output_chunked && (HaveChunkedArray(inputs) || outputs.size()
> 1)) {
+ return ToChunkedArray(outputs, output_descr_.type);
+ } else if (outputs.size() == 1) {
+ // Outputs have just one element
return outputs[0];
Review comment:
`outputs` may be empty vector if input is empty. Use the same
`outputs.size()` checking in above code.
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