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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HIVE-45) Hive: GenericUDF and support of complex object
Date Tue, 05 May 2009 01:13:30 GMT

     [ https://issues.apache.org/jira/browse/HIVE-45?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zheng Shao resolved HIVE-45.
----------------------------

       Resolution: Fixed
    Fix Version/s: 0.4.0

This issue is fixed as part of HIVE-164.

> Hive: GenericUDF and support of complex object
> ----------------------------------------------
>
>                 Key: HIVE-45
>                 URL: https://issues.apache.org/jira/browse/HIVE-45
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>             Fix For: 0.4.0
>
>
> GenericUDF are more powerful than UDF 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. 

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