[jira] Commented: (PIG-928) UDFs in scripting languages

["Julien Le Dem (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12875341#action_12875341 ] 

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

I like Register better as well.

With java UDFs, you REGISTER a jar.
Then you can use the classes in the jar using their fully qualified class name.
Optionally you can use DEFINE to alias the functions or pass extra initialization parameters.

with scripting as implemented by Arnab, you REGISTER a script file (adding the script language information as it is not only java anymore) and you can use all the functions in it (just like you do in java).
Then I would say you should be able to alias them using DEFINE and define a closure by passing extra parameters, DEFINE log2 logn(2, $0); (maybe I am asking to much here ;) )

> 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
>             Fix For: 0.8.0
>
>         Attachments: calltrace.png, package.zip, pig-greek.tgz, pig.scripting.patch.arnab, pyg.tgz, 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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