[SPARK-7312][SQL] SPARK-6913 broke jdk6 build

JIRA: https://issues.apache.org/jira/browse/SPARK-7312

Author: Yin Huai <yhuai@databricks.com>

Closes #5847 from yhuai/jdbcJava6 and squashes the following commits:

68433a2 [Yin Huai] compile with Java 6

1 files changed, 4 insertions, 2 deletions

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/jdbc.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/jdbc.scala
index ae9af1eabe..3a6c2c1e91 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/jdbc.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/jdbc.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql
 
-import java.sql.{Connection, Driver, DriverManager, DriverPropertyInfo, PreparedStatement}
+import java.sql.{Connection, Driver, DriverManager, DriverPropertyInfo, PreparedStatement, SQLFeatureNotSupportedException}
 import java.util.Properties
 
 import scala.collection.mutable
@@ -195,7 +195,9 @@ package object jdbc {
 
     override def getMinorVersion: Int = wrapped.getMinorVersion
 
-    override def getParentLogger: java.util.logging.Logger = wrapped.getParentLogger
+    def getParentLogger: java.util.logging.Logger =
+      throw new SQLFeatureNotSupportedException(
+        s"${this.getClass().getName}.getParentLogger is not yet implemented.")
 
     override def connect(url: String, info: Properties): Connection = wrapped.connect(url, info)