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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-896) Add LEAD/LAG/FIRST/LAST analytical windowing functions to Hive.
Date Sat, 02 Feb 2013 01:21:14 GMT

    [ https://issues.apache.org/jira/browse/HIVE-896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13569345#comment-13569345
] 

Harish Butani commented on HIVE-896:
------------------------------------

Yes Aster is the one I had looked at too. The other one I looked at was Pipelined Partitioned
Table Functions in Oracle; they are bit different, the partitioning information is part of
the Function definition.
 
I am assuming key is an identifier; so this is really an invocation using named parameters.
Since Hive doesn't have named parameters for other functions, could we do positional parameters
for now? 
Later, do named parameters for all functions not just PTFs.
                
> 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
>          Components: OLAP, UDF
>            Reporter: Amr Awadallah
>            Priority: Minor
>         Attachments: DataStructs.pdf, HIVE-896.1.patch.txt, Hive-896.2.patch.txt
>
>
> 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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