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Posted to dev@pig.apache.org by "Olga Natkovich (JIRA)" <ji...@apache.org> on 2011/05/03 21:35:03 UTC

[jira] [Updated] (PIG-1943) jython functions can use the @outputSchema decorator, but only if in the out script that is imported, we should add a builting module pigdecorators.py so that developers can import and use them in lib scripts

     [ https://issues.apache.org/jira/browse/PIG-1943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olga Natkovich updated PIG-1943:
--------------------------------

    Fix Version/s:     (was: 0.9.0)

> jython functions can use the @outputSchema decorator, but only if in the out script that is imported, we should add a builting module pigdecorators.py so that developers can import and use them in lib scripts
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: PIG-1943
>                 URL: https://issues.apache.org/jira/browse/PIG-1943
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>    Affects Versions: 0.8.0, 0.9.0
>            Reporter: Woody Anderson
>            Assignee: Woody Anderson
>            Priority: Minor
>              Labels: pig, python, schema, udf
>
> if you have pig udf functions in a pig script, and want to re-use it (i.g. import from another script) the decorators must be defined. They will not be, due to scoping rules, so the decorators should be available via a standard importable module that ships with the jython framework (as we already define the decorators as part of initializing the interpreter).
> this simply involves adding an appropriately named: pigdecorators.py to the classpath, so a dev can do:
> {quote}
> from pigdecorators import *
> @outputSchema("w:chararray")
> def word():
>  return 'word'
> {quote}
> this can be done currently in the primary script, but when https://issues.apache.org/jira/browse/PIG-1824 is completed, that script would not properly import when used within another script in the future.

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