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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4080) Add Lead & Lag UDAFs
Date Thu, 28 Feb 2013 15:43:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589612#comment-13589612
] 

Phabricator commented on HIVE-4080:
-----------------------------------

ashutoshc has accepted the revision "HIVE-4080 [jira] Add Lead & Lag UDAFs".

  +1

REVISION DETAIL
  https://reviews.facebook.net/D8961

BRANCH
  HIVE-4080

ARCANIST PROJECT
  hive

To: JIRA, ashutoshc, hbutani

                
> Add Lead & Lag UDAFs
> --------------------
>
>                 Key: HIVE-4080
>                 URL: https://issues.apache.org/jira/browse/HIVE-4080
>             Project: Hive
>          Issue Type: Bug
>          Components: PTF-Windowing
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: HIVE-4080.1.patch.txt, HIVE-4080.D8961.1.patch, HIVE-4080.D8961.2.patch,
HIVE-4080.D8961.3.patch
>
>
> Currently we support Lead/Lag as navigation UDFs usable with Windowing.
> To be standard compliant we need to support Lead & Lag UDAFs.
> Will continue to support Lead/Lag UDFs as arguments to UDAFs when Windowing is in play.

> Currently allow Lead/Lag expressions to appear in SelectLists even when they are not
arguments to UDAFs. Support for this feature will probably be removed. Causes ambiguities
when Query contains different partition clauses. Will provide more details with associated
Jira to remove this feature.

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