[GitHub] [arrow-datafusion] jackwener commented on issue #6086: Code refactor, combine the two rules: DecorrelateWhereExists and DecorrelateWhereIn

["jackwener (via GitHub)" <gi...@apache.org>]

jackwener commented on issue #6086:
URL: https://github.com/apache/arrow-datafusion/issues/6086#issuecomment-1517839299

   I think it's a great job.
   
   ExistsSubquery and InSubquery is similar in semantic. some paper already conclude it. Such as: 
   
   AGE IN (SELECT AGE)  --> a.age=b.age[0] OR a.age=b.age[1] OR ... OR a.age=b.age[n]
   Exists (SELECT AGE) --> b.age[0] is not null OR b.age[1] is not null OR ... OR b.age[n] is not null


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