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Posted to user@pig.apache.org by Mark <st...@gmail.com> on 2011/04/07 03:36:46 UTC

UDF questions

What methods should I be implemented when creating my own UDF's other 
than the ones that are required.

For example, when creating a EvalFunc<Tuple> I see there are a bunch of 
classes that override outputSchema, or getArgToFuncMapping.

Should I consider overriding these methods too? Is there any 
documentation on what these methods do and when and why someone should 
override them?

Thanks

Re: UDF questions

Posted by Dmitriy Ryaboy <dv...@gmail.com>.

Hi Mark,
Check out http://pig.apache.org/docs/r0.8.0/udf.html

On Wed, Apr 6, 2011 at 6:36 PM, Mark <st...@gmail.com> wrote:

> What methods should I be implemented when creating my own UDF's other than
> the ones that are required.
>
> For example, when creating a EvalFunc<Tuple> I see there are a bunch of
> classes that override outputSchema, or getArgToFuncMapping.
>
> Should I consider overriding these methods too? Is there any documentation
> on what these methods do and when and why someone should override them?
>
> Thanks
>