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Date: Wed, 11 Mar 2009 18:37:50 -0700 (PDT)
From: "Ashish Thusoo (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Commented: (HIVE-309) FunctionRegistry should allow loading
 UDFs and UDAFs from property file
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    [ https://issues.apache.org/jira/browse/HIVE-309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681136#action_12681136 ] 

Ashish Thusoo commented on HIVE-309:
------------------------------------

sorry to chime in a bit late on this but I was out on vaccation.

I think a better place to store this is the metastore as I think the issue here is to allow third parties to write their own udfs which are persistent. We do have the ability to create temporary UDF mappings. I am right in my understanding??


> FunctionRegistry should allow loading UDFs and UDAFs from property file
> -----------------------------------------------------------------------
>
>                 Key: HIVE-309
>                 URL: https://issues.apache.org/jira/browse/HIVE-309
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Richard Lee
>         Attachments: hive-external-functions-2.diff, hive-external-functions.diff
>
>
> FunctionRegistry.java hard code all UDF, UDAF definitions in a static initializer.  There is no way to add new functions without directly modifying this file.  
> FunctionRegistry SHOULD look for a property file in which new functions and their implementations can be specified.  This will allow third parties to extend hive without maintaining patches against the codebase. 

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