Scott Wilson created ARROW-8199:
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Summary: 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++ - Compute
Affects Versions: 0.16.0
Reporter: Scott Wilson
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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