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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2014/05/10 23:57:03 UTC

[jira] [Commented] (HIVE-6999) Add streaming mode to PTFs

    [ https://issues.apache.org/jira/browse/HIVE-6999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13993748#comment-13993748 ] 

Ashutosh Chauhan commented on HIVE-6999:
----------------------------------------

Overall design looks good. Left few implementation related comments on RB.

> Add streaming mode to PTFs
> --------------------------
>
>                 Key: HIVE-6999
>                 URL: https://issues.apache.org/jira/browse/HIVE-6999
>             Project: Hive
>          Issue Type: Improvement
>    Affects Versions: 0.11.0, 0.12.0, 0.13.0
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: HIVE-6999.1.patch
>
>
> There are a set of use cases where the Table Function can operate on a Partition row by row or on a subset(window) of rows as it is being streamed to it.
> - Windowing has couple of use cases of this:processing of Rank functions, processing of Window Aggregations.
> - But this is a generic concept: any analysis that operates on an Ordered partition maybe able to operate in Streaming mode.
> This patch introduces streaming mode in PTFs and provides the mechanics to handle PTF chains that contain both modes of PTFs.
> Subsequent patches will introduce Streaming mode for Windowing.



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