Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16067#discussion_r90177515
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
---
@@ -58,13 +57,28 @@ abstract class QueryPlan[PlanType <:
QueryPlan[PlanType]] extends TreeNode[PlanT
}
/**
+ * Infer the Attribute-specific IsNotNull constraints from the null
intolerant child expressions
+ * of constraints.
+ */
+ private def inferIsNotNullConstraints(constraint: Expression):
Seq[Expression] =
+ constraint match {
+ case IsNotNull(_: Attribute) => constraint :: Nil
--- End diff --
Yeah, my original idea is to do a fast stop. After rethinking it, it might
be fine.
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