Github user sameeragarwal commented on a diff in the pull request:
https://github.com/apache/spark/pull/10844#discussion_r51647871
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
---
@@ -17,16 +17,62 @@
package org.apache.spark.sql.catalyst.plans
-import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeSet,
Expression, VirtualColumn}
+import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.catalyst.trees.TreeNode
import org.apache.spark.sql.types.{DataType, StructType}
-abstract class QueryPlan[PlanType <: TreeNode[PlanType]] extends
TreeNode[PlanType] {
+abstract class QueryPlan[PlanType <: TreeNode[PlanType]]
+ extends TreeNode[PlanType] with PredicateHelper {
self: PlanType =>
def output: Seq[Attribute]
/**
+ * Extracts the relevant constraints from a given set of constraints
based on the attributes that
+ * appear in the [[outputSet]].
+ */
+ protected def getRelevantConstraints(constraints: Set[Expression]):
Set[Expression] = {
+ constraints
+ .union(constructIsNotNullConstraints(constraints))
+ .filter(constraint =>
+ constraint.references.nonEmpty &&
constraint.references.subsetOf(outputSet))
+ }
+
+ private def constructIsNotNullConstraints(constraints: Set[Expression]):
Set[Expression] = {
--- End diff --
added
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