Github user dongjoon-hyun commented on the pull request: https://github.com/apache/spark/pull/13403#issuecomment-222614982 Thank you for review again @rxin. Actually, I fully understand and expect your decision. The reason why I making this issue is I think we need explicit discussions and the conclusion for this issue. I worried that Spark shows this inconsistency forever implicitly. As we know, if we do not this in Spark 2.0, this will happen on Spark 3.0 or maybe never because of the same reason.
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