Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/10445#issuecomment-167956491
It seems to me the change is not necessary and might actually complicate
the analyzer code itself due to the reliance on the dsl implicits and this
"unapply" (I didn't even know it existed.....)
One thing I do like though is the True and False, although I'd rename it
TrueLiteral and FalseLiteral, in order to make it clear it is a literal.
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