Github user dilipbiswal commented on the pull request: https://github.com/apache/spark/pull/10520#issuecomment-169450366 @yhuai Hi Yin, let me double check. As far as i remember, we come to the last case in expression.scala:semanticEqual with two HiveFunctionWrapper and was failing in equal. With a overriden equal it worked. Let me debug this further and get back...
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