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From "Julien Le Dem (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-928) UDFs in scripting languages
Date Wed, 16 Jun 2010 00:24:27 GMT

    [ https://issues.apache.org/jira/browse/PIG-928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879201#action_12879201
] 

Julien Le Dem commented on PIG-928:
-----------------------------------

I like the suggestion. However I would prefer not to use namespaces by default.
Most likely users will register a few functions and use namespaces only when conflicts happen.
The shortest syntax should be used for the most common use case.

most of the time:
REGISTER /home/alan/myfuncs.py USING python;
B = FOREACH A GENERATE a(x);

when it is needed:
REGISTER /home/alan/myfuncs.py USING python AS myfuncs;
B = FOREACH A GENERATE myfuncs.a(x);

Also register jar does not prefix classes by the jar name so that would be inconsistent.
REGISTER /home/alan/myfuncs.jar;

> UDFs in scripting languages
> ---------------------------
>
>                 Key: PIG-928
>                 URL: https://issues.apache.org/jira/browse/PIG-928
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Alan Gates
>            Assignee: Aniket Mokashi
>             Fix For: 0.8.0
>
>         Attachments: calltrace.png, package.zip, pig-greek.tgz, pig.scripting.patch.arnab,
pyg.tgz, RegisterPythonUDF2.patch, RegisterScriptUDFDefineParse.patch, scripting.tgz, scripting.tgz,
test.zip
>
>
> It should be possible to write UDFs in scripting languages such as python, ruby, etc.
 This frees users from needing to compile Java, generate a jar, etc.  It also opens Pig to
programmers who prefer scripting languages over Java.

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