Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/10844#discussion_r51330688
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -180,6 +229,55 @@ case class Join(
}
}
+ override protected def validConstraints: Set[Expression] = {
+ // Currently we only propagate constraints if the condition consists
of equality
+ // and ranges. For all other cases, we return an empty set of
constraints
+ def constructIsNotNullConstraints(condition: Expression):
Set[Expression] = {
--- End diff --
We typically avoid nested methods unless you are actually closing over
state from the nested scope in the function. I'd consider just making this a
private method.
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