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https://issues.apache.org/jira/browse/ARROW-1565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116048#comment-17116048
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Wes McKinney commented on ARROW-1565:
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I reframed this issue as a query processing task. We need to be able to compute
TopK/BottomK with chunked data
> [C++] Implement TopK/BottomK streaming execution nodes
> ------------------------------------------------------
>
> Key: ARROW-1565
> URL: https://issues.apache.org/jira/browse/ARROW-1565
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Labels: Analytics
> Fix For: 2.0.0
>
>
> Heap-based topk can compute these indices in O(n log k) time
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