Github user ravipesala commented on the pull request:
https://github.com/apache/spark/pull/3249#issuecomment-67778115
Thank you for reviewing it.
I have worked on review comments.Please review it.
I guess the ```SubqueryExpression``` may not be resolved along with main
query and also we may not able to resolve it separately as it may contain the
main query references like ```select C from R1 where R1.A in (Select B from R2
where R1.X = R2.Y) ```. Here R1.X is used inside subquery. So I guess we can
resolve it on the need basis. Please comment
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