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https://issues.apache.org/jira/browse/HIVE-4080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HIVE-4080:
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Attachment: HIVE-4080.D8961.1.patch
hbutani requested code review of "HIVE-4080 [jira] Add Lead & Lag UDAFs".
Reviewers: JIRA
add Lead and Lag UDAFs
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.
TEST PLAN
EMPTY
REVISION DETAIL
https://reviews.facebook.net/D8961
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/test/queries/clientpositive/leadlag_queries.q
ql/src/test/results/clientpositive/leadlag_queries.q.out
MANAGE HERALD RULES
https://reviews.facebook.net/herald/view/differential/
WHY DID I GET THIS EMAIL?
https://reviews.facebook.net/herald/transcript/21705/
To: JIRA, 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
>
>
> 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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