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https://issues.apache.org/jira/browse/ARROW-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17421478#comment-17421478
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Percy Camilo Triveño Aucahuasi commented on ARROW-14035:
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Draft PR https://github.com/apache/arrow/pull/11257
> [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, pull-request-available
> Fix For: 6.0.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> ARROW-12728 added a {{hash_count_distinct}} hash aggregate kernel, but there
> is no non-hash {{count_distinct}} aggregate kernel.
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