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https://issues.apache.org/jira/browse/ARROW-4530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116099#comment-17116099
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Wes McKinney commented on ARROW-4530:
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You may have noticed that the aggregation API was iterated in ARROW-8792. I
think the current structure is adequate for non-hash-aggregations, but we
should think about how to deal with implementing aggregations that can be used
with hash aggregation (aka "GROUP BY")
> [C++] Review Aggregate kernel state allocation/ownership semantics
> ------------------------------------------------------------------
>
> Key: ARROW-4530
> URL: https://issues.apache.org/jira/browse/ARROW-4530
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Francois Saint-Jacques
> Priority: Major
> Labels: analytics
>
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