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https://issues.apache.org/jira/browse/ARROW-17257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574062#comment-17574062
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Aldrin Montana commented on ARROW-17257:
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Linking ARROW-8991, because I am exploring the use of *KeyColumnArray* to
leverage hashing code from *key_hash.h*. But, I am also trying to use
*ExecSpan* and *ArraySpan* which is being added to the kernel execution
framework.
> [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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