Github user dilipbiswal commented on the pull request:
https://github.com/apache/spark/pull/10156#issuecomment-165337440
@yhuai Hi Yin, was waiting for your feed back before i changed the code for
this defect. Do you see a case why this would be a problem if we just ignored
nullability to see if types involved in case expression are equal ?
Also, i think we can do better to handle the struct types in terms of type
promotion. If we have
left side struct(int) and right side struct(long) , then we should be able
to pick the wider type, right ?
I am working on coding this up and was thinking of addressing this in
another PR.
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