HyukjinKwon commented on issue #27901: [SPARK-31146][SQL] Leverage the helper method for aliasing in built-in SQL expressions URL: https://github.com/apache/spark/pull/27901#issuecomment-599301603 I don't think we have made guarantee on the output column name. Also, I would think this is as a rather bug fix. We have already made such changes a lot in the history.
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