davidvrba commented on issue #23267: [SPARK-25401] [SQL] Reorder join predicates to match child outputOrdering URL: https://github.com/apache/spark/pull/23267#issuecomment-458522457 @mgaido91 Thank you very much for your comments. We are changing the key order at the end of the method ensureDistributionAndOrdering and at that moment the child outputPartitioning is already checked and therefore it is ok to change the order of the join keys - it is not going to add unnecessary Exchange for the mismatch.
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