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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/05/26 13:27:59 UTC
[GitHub] [spark] francis0407 commented on issue #23783: [SPARK-26854][SQL]
Support ANY/SOME subquery
francis0407 commented on issue #23783: [SPARK-26854][SQL] Support ANY/SOME subquery
URL: https://github.com/apache/spark/pull/23783#issuecomment-496000374
Hi @dongjoon-hyun,
I reconsidered your question in https://github.com/apache/spark/pull/23783#issuecomment-476066269. Actually, IN/ANY/ALL subqueries can not always be converted to EXISTS. IN/ANY/ALL subqueries are nullable while EXISTS is not.
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