cloud-fan commented on issue #27233: [SPARK-29701][SQL] Correct behaviours of group analytical queries when empty input given URL: https://github.com/apache/spark/pull/27233#issuecomment-576538136 After taking a look, I feel this fix is non-trivial and has many details to think about. It's a bit risky to backport this fix to branch 2.4. How about we list it as a known bug for 2.4.5 if we can't figure out the new approach soon?
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