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https://issues.apache.org/jira/browse/ARROW-17257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574508#comment-17574508
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Aldrin Montana commented on ARROW-17257:
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I realize now that what I need for ARROW-8991 is just to visit child_data,
without having to know the datatypes in those *ArrayData*/*ArraySpan*
instances. So, I'll unlink ARROW-8991. I think some of what I said in the 1st
comment may still be relevant, just not for hashing.
> [C++] Unify KeyColumnArray and ArraySpan
> ----------------------------------------
>
> Key: ARROW-17257
> URL: https://issues.apache.org/jira/browse/ARROW-17257
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Weston Pace
> Priority: Major
>
> Both of these are essentially non-owning views into ArrayData. They were
> developed somewhat independently but share a pretty similar structure. I
> don't think we need both and we should unify on a common type for simplicity
> provided we can show no real performance difference.
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