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From "Christopher, Pat" <patrick.christop...@hp.com>
Subject UDAF documentation
Date Fri, 11 Mar 2011 01:27:34 GMT
Hi Guys,
I'm writing a UDAF to run against hive 0.5 or hive 0.7.  The documentation I can find says
to implement UDAFEvaluator and ensure that you implement init() , aggregate() and evaluate().
 However, all of the examples I can find implement init(), iterate(), merge(), terminatePartial()
and terminate().

What's the difference and where I can find the documentation on how to write a UDAF?

Thanks,
Pat

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