liupc commented on issue #25020: [SPARK-28220][SQL]Fix foldable join condition not pushed down when parent filter is wholly pushed down URL: https://github.com/apache/spark/pull/25020#issuecomment-507613368 @maropu But it's a real case that we encountered in our production environment, there are cases user create some view and add some constant tag column, and then query these views with joins and filters. We can not control the upper user how to write the best sql, and expect them to look carefully into all the views before querying, but we can make the engine robuster by adding a few of codes.
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