Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/3110#issuecomment-62109507
@marmbrus @yhuai `nullable` for type `ArrayType` is not supported by Hive
in semantic, this gives us some troubles in data type comparison, and lead to
value casting eventually, not sure if we can ignore the `nullable` for
`ArrayType` currently (by rewriting the equals / hashCode methods in class
`ArrayType`). Any ideas?
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