Harish Butani created HIVE-4080:
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Summary: 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
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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