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https://issues.apache.org/jira/browse/ARROW-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419364#comment-17419364
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Percy Camilo Triveño Aucahuasi commented on ARROW-14035:
--------------------------------------------------------

Thanks [~icook], another question: What is the difference between 
_value_counts_ and _count_distinct_?

[https://github.com/apache/arrow/blob/master/docs/source/cpp/compute.rst#associative-transforms]

 

> [C++][Compute] Implement non-hash count_distinct aggregate kernel
> -----------------------------------------------------------------
>
>                 Key: ARROW-14035
>                 URL: https://issues.apache.org/jira/browse/ARROW-14035
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Ian Cook
>            Assignee: Percy Camilo Triveño Aucahuasi
>            Priority: Critical
>              Labels: kernel
>             Fix For: 6.0.0
>
>
> ARROW-12728 added a {{hash_count_distinct}} hash aggregate kernel, but there 
> is no non-hash {{count_distinct}} aggregate kernel.



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