Github user adrian-wang commented on a diff in the pull request: https://github.com/apache/spark/pull/11297#discussion_r56101451 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala --- @@ -1169,6 +1170,7 @@ object PushPredicateThroughJoin extends Rule[LogicalPlan] with PredicateHelper { Join(newLeft, newRight, LeftOuter, newJoinCond) case FullOuter => f case NaturalJoin(_) => sys.error("Untransformed NaturalJoin node") + case UsingJoin(_, _) => sys.error("Untransformed Using join node") --- End diff -- JoinType is sealed, so we need to put something in this pattern match
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