rtpsw commented on code in PR #14352:
URL: https://github.com/apache/arrow/pull/14352#discussion_r1019618462


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cpp/src/arrow/compute/kernels/hash_aggregate_test.cc:
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@@ -71,6 +71,31 @@ using internal::checked_pointer_cast;
 namespace compute {
 namespace {
 
+Result<Datum> AlternatorGroupBy(const std::vector<Datum>& arguments,

Review Comment:
   IIRC, the intention was to cover both code paths in various existing test 
cases, but I couldn't easily find a way to do this both clean and simple, and I 
opted for simple. I'm not happy about this either. I'll think about how to 
clean this up when I get back to this PR.



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