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Posted to issues@arrow.apache.org by "Yibo Cai (Jira)" <ji...@apache.org> on 2020/03/13 04:09:00 UTC

[jira] [Commented] (ARROW-8090) [C++][Compute] Implement stateful TopK operator node

    [ https://issues.apache.org/jira/browse/ARROW-8090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17058408#comment-17058408 ] 

Yibo Cai commented on ARROW-8090:
---------------------------------

This looks interesting. Is it a stream filter or similar feature?

I'm not sure where in arrow source code this implementation will fit. I see some streaming code in ipc module, but no computing related code found.

> [C++][Compute] Implement stateful TopK operator node
> ----------------------------------------------------
>
>                 Key: ARROW-8090
>                 URL: https://issues.apache.org/jira/browse/ARROW-8090
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>
> A static kernel for single arrays was implemented in ARROW-7587. We will want to have the ability to compute TopK (and eventually TopK by group) on streaming datasets



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