From d6bba37147fef5088513542098d14a8650d7339b Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 19 Jan 2017 10:23:50 -0800
Subject: [PATCH] bug fix

---
 .../org/apache/spark/sql/catalyst/expressions/predicates.scala   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
index 1c18f4457f52c..ac56ff13fa5bf 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
@@ -93,6 +93,7 @@ trait PredicateHelper {
     case e: SubqueryExpression =>
       // non-correlated subquery will be replaced as literal
       e.children.isEmpty
+    case a: AttributeReference => true
     case e: Unevaluable => false
     case e => e.children.forall(canEvaluateWithinJoin)
   }