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[SPARK-17228][SQL] Not infer/propagate non-deterministic constraints #14795

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[SPARK-17228][SQL] Not infer/propagate non-deterministic constraints #14795

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3 changes: 2 additions & 1 deletion sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,8 @@ abstract class QueryPlan[PlanType <: QueryPlan[PlanType]] extends TreeNode[PlanT
.union(inferAdditionalConstraints(constraints))
.union(constructIsNotNullConstraints(constraints))
.filter(constraint =>
constraint.references.nonEmpty && constraint.references.subsetOf(outputSet))
constraint.references.nonEmpty && constraint.references.subsetOf(outputSet) &&
constraint.deterministic)
}

/**
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17 changes: 17 additions & 0 deletions ...alyst/src/test/scala/org/apache/spark/sql/catalyst/plans/ConstraintPropagationSuite.scala
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Expand Up @@ -352,4 +352,21 @@ class ConstraintPropagationSuite extends SparkFunSuite {
verifyConstraints(tr.analyze.constraints,
ExpressionSet(Seq(IsNotNull(resolveColumn(tr, "b")), IsNotNull(resolveColumn(tr, "c")))))
}

test("not infer non-deterministic constraints") {
val tr = LocalRelation('a.int, 'b.string, 'c.int)

verifyConstraints(tr
.where('a.attr === Rand(0))
.analyze.constraints,
ExpressionSet(Seq(IsNotNull(resolveColumn(tr, "a")))))

verifyConstraints(tr
.where('a.attr === InputFileName())
.where('a.attr =!= 'c.attr)
.analyze.constraints,
ExpressionSet(Seq(resolveColumn(tr, "a") =!= resolveColumn(tr, "c"),
IsNotNull(resolveColumn(tr, "a")),
IsNotNull(resolveColumn(tr, "c")))))
}
}