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Posted to dev@hive.apache.org by "Zhuoluo (Clark) Yang (JIRA)" <ji...@apache.org> on 2011/07/10 14:37:59 UTC
[jira] [Commented] (HIVE-896) Add LEAD/LAG/FIRST/LAST analytical
windowing functions to Hive.
[ https://issues.apache.org/jira/browse/HIVE-896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13062727#comment-13062727 ]
Zhuoluo (Clark) Yang commented on HIVE-896:
-------------------------------------------
I think it is necessary to have a kind of functions called UDWF (User-Defined Windowing Function).
> Add LEAD/LAG/FIRST/LAST analytical windowing functions to Hive.
> ---------------------------------------------------------------
>
> Key: HIVE-896
> URL: https://issues.apache.org/jira/browse/HIVE-896
> Project: Hive
> Issue Type: New Feature
> Reporter: Amr Awadallah
> Priority: Minor
>
> Windowing functions are very useful for click stream processing and similar time-series/sliding-window analytics.
> More details at:
> http://download-west.oracle.com/docs/cd/B13789_01/server.101/b10736/analysis.htm#i1006709
> http://download-west.oracle.com/docs/cd/B13789_01/server.101/b10736/analysis.htm#i1007059
> http://download-west.oracle.com/docs/cd/B13789_01/server.101/b10736/analysis.htm#i1007032
> -- amr
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