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From "Mohammad Kamrul Islam (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5731) Use new GenericUDF instead of basic UDF for UDFDate* classes
Date Mon, 04 Nov 2013 21:18:17 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mohammad Kamrul Islam updated HIVE-5731:
----------------------------------------

    Status: Patch Available  (was: Open)

> Use new GenericUDF instead of basic UDF for UDFDate* classes 
> -------------------------------------------------------------
>
>                 Key: HIVE-5731
>                 URL: https://issues.apache.org/jira/browse/HIVE-5731
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Mohammad Kamrul Islam
>            Assignee: Mohammad Kamrul Islam
>         Attachments: HIVE-5731.1.patch
>
>
> GenericUDF class is the latest and recommended base class for any UDFs.
> This JIRA is to change the current UDFDate* classes extended from GenericUDF.
> The general benefit of GenericUDF is described in comments as
> "* The GenericUDF are superior to normal UDFs in the following ways: 1. It can
>     accept arguments of complex types, and return complex types. 2. It can accept
>     variable length of arguments. 3. It can accept an infinite number of function
>     signature - for example, it's easy to write a GenericUDF that accepts
>     array<int>, array<array<int>> and so on (arbitrary levels of nesting).
4. It
>     can do short-circuit evaluations using DeferedObject."



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