Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20670#discussion_r171182102
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/QueryPlanConstraints.scala
---
@@ -22,21 +22,30 @@ import org.apache.spark.sql.catalyst.expressions._
trait QueryPlanConstraints { self: LogicalPlan =>
+ /**
+ * An [[ExpressionSet]] that contains an additional set of constraints
about equality
+ * constraints and `isNotNull` constraints.
+ */
+ lazy val allConstraints: ExpressionSet = {
+ if (conf.constraintPropagationEnabled) {
+ ExpressionSet(validConstraints
+ .union(inferAdditionalConstraints(validConstraints))
+ .union(constructIsNotNullConstraints(validConstraints)))
+ } else {
+ ExpressionSet(Set.empty)
+ }
+ }
+
/**
* An [[ExpressionSet]] that contains invariants about the rows output
by this operator. For
* example, if this set contains the expression `a = 2` then that
expression is guaranteed to
* evaluate to `true` for all rows produced.
*/
lazy val constraints: ExpressionSet = {
if (conf.constraintPropagationEnabled) {
--- End diff --
now we don't need this if.
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