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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4080) Add Lead & Lag UDAFs
Date Wed, 27 Feb 2013 23:55:15 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-4080:
------------------------------

    Attachment: HIVE-4080.D8961.2.patch

hbutani updated the revision "HIVE-4080 [jira] Add Lead & Lag UDAFs".

    - add Lead and Lag UDAFs, fix issues specified in review

Reviewers: ashutoshc, JIRA

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

CHANGE SINCE LAST DIFF
  https://reviews.facebook.net/D8961?vs=28749&id=28803#toc

AFFECTED FILES
  ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java
  ql/src/java/org/apache/hadoop/hive/ql/parse/PTFTranslator.java
  ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLag.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLead.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLeadLag.java
  ql/src/test/queries/clientpositive/leadlag_queries.q
  ql/src/test/results/clientpositive/leadlag_queries.q.out

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
>
>
> 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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