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https://issues.apache.org/jira/browse/ARROW-13451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17387996#comment-17387996
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Ben Kietzman commented on ARROW-13451:
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[~wesm]
> [C++][Compute] Consider removing ScalarAggregateKernel
> ------------------------------------------------------
>
> Key: ARROW-13451
> URL: https://issues.apache.org/jira/browse/ARROW-13451
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Ben Kietzman
> Priority: Major
>
> Scalar aggregation does not incur large memory overhead for the associated
> KernelState objects, so maybe it'd be acceptable to remove explicit scalar
> aggregation kernels in favor of reusing grouped aggregation kernels with a
> single group. This would decrease our maintenance burden significantly, and
> if the benchmarks don't show a regression for single-group aggregation then
> there's no reason not to
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