From 7aa2e9f9113ace0106ed1de31bad5997d600f03b Mon Sep 17 00:00:00 2001
From: Kevin Yu <qyu@us.ibm.com>
Date: Wed, 31 Oct 2018 15:40:04 -0700
Subject: [PATCH] return AttributeReference type for
 AttributeReference.withMetadata

---
 .../spark/sql/catalyst/expressions/namedExpressions.scala       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 584a2946bd56..100ed8228929 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -307,7 +307,7 @@ case class AttributeReference(
     }
   }
 
-  override def withMetadata(newMetadata: Metadata): Attribute = {
+  override def withMetadata(newMetadata: Metadata): AttributeReference = {
     AttributeReference(name, dataType, nullable, newMetadata)(exprId, qualifier)
   }