Github user yhuai commented on the issue:
https://github.com/apache/spark/pull/13772
@viirya Thank you for the pr. After I filed the jira, I did some
investigation. Actually as I noted at
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala#L372,
the parser will turn the keys to their lowercase forms. So, I think there is
nothing really broken assuming case-insensitive resolution is used. How about
we close this PR? We need to address the case-sensitivity flag in a holistic
way. We can revisit this particular issue later.
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