[jira] [Commented] (ARROW-1900) [C++] Add utility functions for determining value range (maximum and minimum) of integer arrays

["Panchen Xue (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16336403#comment-16336403 ] 

Panchen Xue commented on ARROW-1900:
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Shall we add this functions (GetValueRange) to base class Array or derived class PrimitiveArray?

> [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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