amanomer commented on issue #26808: [SPARK-30184][SQL] Implement a helper method for aliasing functions URL: https://github.com/apache/spark/pull/26808#issuecomment-564546490 Other class (`First`, `Last`) which takes `funcName` as arguments, I think we should override `flatArguments` there also? Currently, no test cases will fail because of it but in future this may create problem. cc @cloud-fan
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