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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-309) FunctionRegistry should allow loading UDFs and UDAFs from property file
Date Wed, 11 Mar 2009 19:08:50 GMT

    [ https://issues.apache.org/jira/browse/HIVE-309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680992#action_12680992
] 

Zheng Shao commented on HIVE-309:
---------------------------------

Hi Richard, sorry for the delay.
It seems the only call to registerUDF in your new patch is: registerUDF(parts[2], clazz, operatorType,
false); 

This does not implement what you mentioned:
{code}
udf.IDENTIFIER=FUNCTIONNAME,CLASSNAME[,OPERATORTYPE,[ISOPERATOR,[DISPLAYNAME]]]
{code}

Does it?



> 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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