Github user dilipbiswal commented on the pull request:
https://github.com/apache/spark/pull/10520#issuecomment-169175945
@yhuai Hi Yin, Here is what i had while answering the question from Nong
Li. Please let me know if you have more questions that i need to find the
answers for.
In this case , we have two instances of HiveGenericUDF one from the
grouping expression and other from aggregation expression. While doing a
semantic equality between them , we unwrap the case class and fall through to
the last case statement which does equality between two HiveFunctionWrapper(s)
and is failing.
Let me know what you think.
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