Github user henryr commented on the issue:
https://github.com/apache/spark/pull/21049
@dilipbiswal I tried hard to find something in the SQL standard that
clarified the situation, but couldn't (of course that could be because the
standard is pretty hard to parse... :)).
So let's go with the idea of not dropping `ORDER BY` in inline views, but
we can safely drop them in scalar subqueries and nested subqueries. What do you
think?
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