Hi Julien,
Thanks for a quick reply. I patched my local version of
JythonFunction to pass the input parameters when 'varargs' is true.
stan
On Mon, Oct 17, 2011 at 2:26 PM, Julien Le Dem <jul...@twitter.com> wrote:
> Hi,
> I'm looking into it. Internally varargs advertise themselves as having 0
> args so I need to add a special case in the JythonFunction to handle
> varargs. I'll create a JIRA for this.
> For now you can not use varargs as they will always be called with no
> parameters.
> Julien
>
> On Mon, Oct 17, 2011 at 9:54 AM, Stan Rosenberg <
> srosenb...@proclivitysystems.com> wrote:
>
>> Hi,
>>
>> I have a simple python udf which takes a variable number of (string)
>> arguments and returns the first non-empty one.
>> I can see that the udf is invoked from pig but no arguments are being
>> passed.
>>
>> Here is the script:
>> =========================================================
>>
>> #!/usr/bin/python
>>
>> from org.apache.pig.scripting import *
>>
>> @outputSchema("s:chararray")
>> def firstNonempty(*args):
>> print args
>> for v in args:
>> if len(v) != 0:
>> return v
>> return ''
>>
>> if __name__ == "__main__":
>> Pig.compile("""
>> data = load 'input.txt' AS (string1:chararray, string2:chararray);
>> data = foreach data generate firstNonempty(string1, string2) as id,
>> string1, string2;
>> dump data;
>> """).bind().runSingle()
>>
>> ===========================================================
>>
>> Thanks!
>>
>> stan
>>
>
