[jira] [Commented] (ARROW-8199) [C++] Guidance for creating multi-column sort on Table example?

["Wes McKinney (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-8199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192873#comment-17192873 ] 

Wes McKinney commented on ARROW-8199:
-------------------------------------

That's great news. Thanks for attaching the code -- if you apply an open source license to it (like Apache 2.0) then others may be able to reuse parts of it. 

> [C++] Guidance for creating multi-column sort on Table example?
> ---------------------------------------------------------------
>
>                 Key: ARROW-8199
>                 URL: https://issues.apache.org/jira/browse/ARROW-8199
>             Project: Apache Arrow
>          Issue Type: Wish
>          Components: C++
>    Affects Versions: 0.16.0
>            Reporter: Scott Wilson
>            Priority: Minor
>              Labels: c++, newbie
>         Attachments: ArrowCsv.cpp, DataFrame.h
>
>
> I'm just coming up to speed with Arrow and am noticing a dearth of examples ... maybe I can help here.
> I'd like to implement multi-column sorting for Tables and just want to ensure that I'm not duplicating existing work or proposing a bad design.
> My thought was to create a Table-specific version of SortToIndices() where you can specify the columns and sort order.
> Then I'd create Array "views" that use the Indices to remap from the original Array values to the values in sorted order. (Original data is not sorted, but could be as a second step.) I noticed some of the array list variants keep offsets, but didn't see anything that supports remapping per a list of indices, but this may just be my oversight?
> Thanks in advance, Scott



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