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https://issues.apache.org/jira/browse/ARROW-8199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kouhei Sutou updated ARROW-8199:
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Summary: [C++] Add support for multi-column sort on Table (was: [C++] Add
support for multi-column sort on Table example?)
> [C++] Add support for multi-column sort on Table
> ------------------------------------------------
>
> 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
> Assignee: Kouhei Sutou
> Priority: Minor
> Labels: pull-request-available
> Attachments: ArrowCsv.cpp, DataFrame.h
>
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> 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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