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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4070) [Hive] Provide a mechanism for registering UDFs from the query language
Date Fri, 12 Sep 2008 12:37:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630556#action_12630556
] 

Tom White commented on HADOOP-4070:
-----------------------------------

Thanks for all your feedback. I'm working on a test case.

The reason I called it AdminWork was because I was following the terminology used in MySQL.
"DDLWork" and "DDLFunctionsWork" don't sound right as function creation is not really a part
of DDL. I can rename it something more specific - CreateFunctionWork?

I agree that it would be good to make the mapping persistent, and add drop and rename, but
these can be done in later Jiras.

{quote}
The reason for that code was that user could specify the list of auxiliary jars in hive-default.xml
(and also by setting the hive.aux.jars.path in hive command line client as a session variable).
In which case GenericOptionsParser code doesn't work. I think appending 'file://' is new to
19.
{quote}

Not sure about that, but HADOOP-3743 certainly changed things in that area. The problem is
that if you set the variable HIVE_AUX_JARS_PATH to say /foo then the session variable hive.aux.jars.path
is set to /foo by the hive script, rather than file:///foo. So I've been overriding this by
redefining the session variable at the moment. What's the best way of fixing this?

> [Hive] Provide a mechanism for registering UDFs from the query language
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-4070
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4070
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: contrib/hive
>            Reporter: Tom White
>         Attachments: hadoop-4070.patch
>
>
> UDFs (user defined functions) in Hive are currently actually built-in functions. This
issue is to develop a packaging and registration mechanism so users can add their own functions
at runtime.

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