[jira] [Commented] (ARROW-17622) [C++] Order-aware non-sink Fetch Node

["Apache Arrow JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-17622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17643480#comment-17643480 ] 

Apache Arrow JIRA Bot commented on ARROW-17622:
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This issue was last updated over 90 days ago, which may be an indication it is no longer being actively worked. To better reflect the current state, the issue is being unassigned per [project policy|https://arrow.apache.org/docs/dev/developers/bug_reports.html#issue-assignment]. Please feel free to re-take assignment of the issue if it is being actively worked, or if you plan to start that work soon.

> [C++] Order-aware non-sink Fetch Node
> -------------------------------------
>
>                 Key: ARROW-17622
>                 URL: https://issues.apache.org/jira/browse/ARROW-17622
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Vibhatha Lakmal Abeykoon
>            Assignee: Vibhatha Lakmal Abeykoon
>            Priority: Major
>
> Considering the existing sink nodes and newly introduced Fetch node with sort capability, we will only need two nodes, "sort", and "fetch" in the long run. Because once the ordered execution is integrated, some features could be removed. Right now, there are three nodes doing somewhat closely related things which is redundant work assuming unordered execution. Namely they are, "order_by_sink", "fetch_sink", and "select_k_sink". So one of them will need to go away at some point and all of them will no longer be sink nodes and sorting behavior will need to be removed from "fetch".
> The task breakdown needs to be determined. Better to keep a few sub-tasks. 



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