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https://issues.apache.org/jira/browse/ARROW-16234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17526689#comment-17526689
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Will Ayd commented on ARROW-16234:
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I was thinking they wouldn't - the returning array would just give back NULL
where NULL was initially provided. You'll see this in the pandas docs as
"na_option"
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.rank.html
> [C++] Implement Rank Kernel
> ---------------------------
>
> Key: ARROW-16234
> URL: https://issues.apache.org/jira/browse/ARROW-16234
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Will Ayd
> Assignee: Will Ayd
> Priority: Minor
> Labels: C++, good-second-issue, kernel, pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Didn't see this in the library already so apologies if overlooked, but I
> think it would be nice to add a compute kernel for ranking. Here is a similar
> function in pandas:
> [https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.rank.html]
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