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https://issues.apache.org/jira/browse/ARROW-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16336497#comment-16336497
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Wes McKinney commented on ARROW-1900:
-------------------------------------
Let's leave this issue lie for a little while -- we can implement this when we
get around to implementing "small range" optimizations in the hash table
algorithms.
> [C++] Add utility functions for determining value range (maximum and minimum)
> of integer arrays
> -----------------------------------------------------------------------------------------------
>
> Key: ARROW-1900
> URL: https://issues.apache.org/jira/browse/ARROW-1900
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
>
> These functions don't need to be kernels right away; they are useful
> internally for determining when a "small range" alternative to a hash table
> can be used for integer arrays. The maximum and minimum is determined in a
> single scan
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