Github user tejasapatil commented on the issue:
https://github.com/apache/spark/pull/18692
Can we restrict this to cartesian product ONLY ? One clear downside of
doing this for other joins is that it will potentially add shuffle in case of
(bucketing queries) and (subqueries in general). After adding the inferred join
conditions, it might lead to the child node's partitioning NOT satisfying the
JOIN node's requirements which otherwise could have.
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