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https://issues.apache.org/jira/browse/HIVE-309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681432#action_12681432
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Richard Lee commented on HIVE-309:
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I think that I would prefer to go the property file route. It's really nice to
just add a jar to the classpath and have the functions defined there show up.
I guess i should modify the patch to iterate through all hive-udf.properties
files encountered in case more than one jar or directory contains function
definitions.
This essentially allows users to mix and match what they include by altering
the HIVE_AUX_JARS_PATH.
> 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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