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Posted to dev@hive.apache.org by "Harish Butani (JIRA)" <ji...@apache.org> on 2014/05/01 20:27:15 UTC
[jira] [Assigned] (HIVE-6999) Add streaming mode to PTFs
[ https://issues.apache.org/jira/browse/HIVE-6999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Harish Butani reassigned HIVE-6999:
-----------------------------------
Assignee: Harish Butani
> Add streaming mode to PTFs
> --------------------------
>
> Key: HIVE-6999
> URL: https://issues.apache.org/jira/browse/HIVE-6999
> Project: Hive
> Issue Type: Improvement
> Reporter: Harish Butani
> Assignee: Harish Butani
>
> 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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