I'm fairly new to writing UDFs and Pig in general. I want to be able to write a UDF that can take advantage of MapReduce's sorting of data. Specifically, I'm trying to conceive how I'd write a UDF to do a specialized join or a pivot. In both cases, sorting would be useful. EvalFunc seems to give no guarantees about ordering of tuples that are passed in.
Is there any way to do such things as a UDF?
TIA for your help,
Machine Learning Engineer
ColdLight Solutions, LLC
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