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https://issues.apache.org/jira/browse/PIG-928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877667#action_12877667
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Aniket Mokashi commented on PIG-928:
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I support above comment.
Also, in favor of not breaking old code. I think, we should avoid introducing
new keywords.
In the above proposal, by adding python as a lang-keyword I meant to hide
extensibility of ScriptEngine interface by natively supporting python. If we
have to allow users add support for other languages. we need to allow "using
org.apache.pig.scripting.jython.JythonScriptEngine". But this will need us to
document the scriptengine interface.
Following seems to be more suitable choice. Comments?
{code}
-- register all UDFs inside test.py using custom (or builtin) ScriptEngine
register 'test.py' using org.apache.pig.scripting.jython.JythonScriptEngine
ship ('1.py', '2.py');
-- namespace? test.helloworld?
b = foreach a generate helloworld(a.$0), complex(a.$1);
-- register helloworld UDF as hello using JythonScriptEngine
define hello using org.apache.pig.scripting.jython.JythonScriptEngine from
'test.py'#helloworld ship ('1.py', '2.py');
b = foreach a generate helloworld(a.$0);
{code}
Also, register scalascript.jar would not be necessary if
getStandardScriptJarPath() returns the path of the 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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