Github user dilipbiswal commented on the pull request:
https://github.com/apache/spark/pull/10156#issuecomment-165339617
@yhuai Hi Yin, forgot to mention.. i tried to handle just the nulllability
difference in findWiderTypeForTwo() like following ..
case (a: StructType, b: StructType) =>
if (DataType.equalsIgnoreNullability(a, b)) {
Some(a.asNullable)
}
else {
None
}
This also works... but feel the original change is simpler unless of course
there is any serious issue with it :-)
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