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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/04/12 12:27:22 UTC

[GitHub] [spark] gengliangwang commented on pull request #32129: [SPARK-35028][SQL] ANSI mode: disallow group by aliases

gengliangwang commented on pull request #32129:
URL: https://github.com/apache/spark/pull/32129#issuecomment-817768195


   There has been some discussion under the PR that supports group by alias: https://github.com/apache/spark/pull/17191
   @cloud-fan also mention the issue behind that behavior in https://github.com/apache/spark/pull/27775
   
   Group by aliases is convenient. But it can be ambiguous and incompatible with SQL standard. 


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