Github user adrian-wang commented on a diff in the pull request:
https://github.com/apache/spark/pull/10762#discussion_r51106564
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -919,6 +919,7 @@ object PushPredicateThroughJoin extends
Rule[LogicalPlan] with PredicateHelper {
(rightFilterConditions ++ commonFilterCondition).
reduceLeftOption(And).map(Filter(_,
newJoin)).getOrElse(newJoin)
case FullOuter => f // DO Nothing for Full Outer Join
+ case NaturalJoin(_) => sys.error("Untransformed NaturalJoin node")
--- End diff --
Yes, but joinType is a sealed abstract class, so we have to put something
here.
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