Github user sameeragarwal commented on the pull request:
https://github.com/apache/spark/pull/11670#issuecomment-197022980
I actually found this issue while playing around with some tests.
@gatorsmile can you give an example for a case where we generate redundant
filters? The code does seem to check the constraints of its children (which are
derived from their condition) before generating additional filters.
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