Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/17186#discussion_r104665124
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala
---
@@ -135,7 +136,8 @@ object EliminateOuterJoin extends Rule[LogicalPlan]
with PredicateHelper {
}
def apply(plan: LogicalPlan): LogicalPlan = plan transform {
- case f @ Filter(condition, j @ Join(_, _, RightOuter | LeftOuter |
FullOuter, _)) =>
+ case f @ Filter(condition, j @ Join(_, _, RightOuter | LeftOuter |
FullOuter, _))
+ if conf.constraintPropagationEnabled =>
--- End diff --
This is far to restrictive. We can still eliminate outer joins without
constraint propagation.
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