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https://issues.apache.org/jira/browse/HIVE-4505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13650363#comment-13650363
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Prasad Mujumdar commented on HIVE-4505:
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[~owen.omalley] Thanks for taking a look. 
yes, the fix is to essentially to revert HIVE-3431 and to provide configuration 
options. Hive already support ${user.name} and with this patch you can also use 
${hive.server2.session} to have separate directory per session. The level of 
isolation that you need depends on the configuration (stand-alone vs Server) 
and this provides you options to tune it per the use case.

                
> Hive can't load transforms added using 'ADD FILE'
> -------------------------------------------------
>
>                 Key: HIVE-4505
>                 URL: https://issues.apache.org/jira/browse/HIVE-4505
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Prasad Mujumdar
>            Assignee: Prasad Mujumdar
>            Priority: Blocker
>         Attachments: HIVE-4505-1.patch
>
>
> ADD FILE mangles name of the resource when copying to resource download 
> directory. As a results following doesn't work:
> {code:sql}
> ADD FILE test.py;
> SELECT TRANSFORM (id) USING 'python test.py' AS b FROM tab1;
> {code}
> The resource gets added with a different name every time which makes it 
> impossible to use transform in non-interactive mode.
> This seems to be due to HIVE-3431

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