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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/03/09 01:58:14 UTC

[GitHub] [spark] LantaoJin commented on pull request #35760: [SPARK-37865][SQL] Fix union deduplication correctness bug

LantaoJin commented on pull request #35760:
URL: https://github.com/apache/spark/pull/35760#issuecomment-1062476004


    > And why we should support select a from (SELECT a, a ...
   
   What are the behaviors of other engines such as PostgreSQL, MySQL?


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