Pig pass relation as argument to UDF

Question

I need to pass a relation to a UDF in PIG

 articles = load x using ...;
 groupedArticles = udfs.MyUDF(articles);

Is something like this possible? Any workaround?

thanks

And what needs to be done after ? First suggestion would be to pass each column. — Arun A K, Jan 19 '15 at 14:05
Yes, but I need to handle say all tuples at hand and not one at a time. — Altober, Jan 20 '15 at 13:15

score 2 · Accepted Answer · answered Jan 19 '15 at 16:08

I guess you mean to pass all fields of the relation to the UDF? Passing the relation would not make sense. In any case this depends on how your load statement looks like. If you load each entry as a tuple load x using ... as (entry:(a:int, b:chararray, ...)) than you could pass that to the UDF like groupedArticles = foreach articles generate udfs.MyUDF(entry) Passing the whole line as a tuple is probably the most generic way, you have to deal with a generic tuple in your UDF though.

Pig pass relation as argument to UDF

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