Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/5080#issuecomment-95329051
@ash211, exactly. I think the best tactic is to create a new SQL92 parser
with something more robust than Scala parser combinators.
@watermen, do other dialects actually disallow those words as identifiers?
I think part of the problem here is that scala parser combinators are very
rigid and our keywords can never be used as identifiers even where it would not
cause ambiguity.
That said, if there is a lot of demand for this, we can add it. I just
want everyone to be aware that there is a cost to compatibility for every
addition (and users have complained in the past).
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