Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/9055#issuecomment-147019968
cc @marmbrus @yhuai @ravipesala
This implementation inspired by #3249, by using the `SubQueryExpression`.
and also the follow up with #4812.
Since the anti join is another type of `SEMI JOIN`, I added it back here
for performance concern in transform the "NOT EXISTS / NOT IN" subquery.
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