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https://issues.apache.org/jira/browse/ARROW-4787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francois Saint-Jacques reassigned ARROW-4787:
---------------------------------------------

    Assignee: Francois Saint-Jacques

> [C++] Include "null" values (perhaps with an option to toggle on/off) in hash 
> kernel actions
> --------------------------------------------------------------------------------------------
>
>                 Key: ARROW-4787
>                 URL: https://issues.apache.org/jira/browse/ARROW-4787
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Francois Saint-Jacques
>            Priority: Major
>             Fix For: 0.15.0
>
>
> Null is a meaningful value in the context of analytics. We should have the 
> option of considering it distinctly in e.g. {{ValueCounts}} 



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