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https://issues.apache.org/jira/browse/ARROW-13764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17405324#comment-17405324
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Nic Crane edited comment on ARROW-13764 at 8/26/21, 3:59 PM:
-------------------------------------------------------------

Ah, my mistake, CountOptions would be fantastic, thanks!  (and yep, what Neal 
said)


was (Author: thisisnic):
Ah, my mistake, CountOptions would be fantastic, thanks!

> [C++] Implement ScalarAggregateOptions for count_distinct (grouped) 
> --------------------------------------------------------------------
>
>                 Key: ARROW-13764
>                 URL: https://issues.apache.org/jira/browse/ARROW-13764
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Nic Crane
>            Assignee: David Li
>            Priority: Major
>              Labels: kernel
>             Fix For: 6.0.0
>
>
> I'm writing the R bindings for the grouped {{count_distinct}} kernel, but the 
> current implementation counts nulls as their own group.  To match the R 
> behaviour,  I need to be able to specify whether or not to remove NA/NULL 
> values.
> Please could we have ScalarAggregateOptions implemented for 
> {{count_distinct}}?



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