Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20670#discussion_r171463022
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/QueryPlanConstraints.scala
---
@@ -22,21 +22,24 @@ import org.apache.spark.sql.catalyst.expressions._
trait QueryPlanConstraints { self: LogicalPlan =>
+ /**
+ * An [[ExpressionSet]] that contains an additional set of constraints,
such as equality
+ * constraints and `isNotNull` constraints, etc.
+ */
+ lazy val allConstraints: ExpressionSet = ExpressionSet(validConstraints
--- End diff --
We still need `if (conf.constraintPropagationEnabled)`
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