From c071c2f9144672487c15bd624d0d5f47130e1f08 Mon Sep 17 00:00:00 2001
From: Shuangshuang Wang <wsszone@gmail.com>
Date: Tue, 4 Jul 2017 16:56:08 +0800
Subject: [PATCH] SPARK-19726: alwaysNullable and nullable is different

---
 .../apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
index a4ac8e2b8c2d8..55b2539c13381 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
@@ -295,7 +295,7 @@ object JdbcUtils extends Logging {
         }
       }
       val nullable = if (alwaysNullable) {
-        alwaysNullable
+        true
       } else {
         rsmd.isNullable(i + 1) != ResultSetMetaData.columnNoNulls
       }