WeichenXu123 commented on issue #25520: [SPARK-28621][SQL] Make spark.sql.crossJoin.enabled default value true URL: https://github.com/apache/spark/pull/25520#issuecomment-523714438 @maropu Yep, we can move the `CheckCartesianProducts` to planner stage and fix some mismatching errors. But note that because there is "join reorder" in optimizer, we have no way to prevent mismatching error in all cases (such as there is a cross join, and then it is reordered...) So that in order to address this in simpler way, we can turn off showing this cross-join error by default.
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