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From "Harish Butani (JIRA)" <>
Subject [jira] [Updated] (HIVE-6999) Add streaming mode to PTFs
Date Sat, 17 May 2014 02:05:15 GMT


Harish Butani updated HIVE-6999:

    Attachment: HIVE-6999.4.patch

> Add streaming mode to PTFs
> --------------------------
>                 Key: HIVE-6999
>                 URL:
>             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, HIVE-6999.2.patch, HIVE-6999.3.patch, HIVE-6999.4.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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