[SQL] [MINOR] Fixes a minor Java example error in SQL programming guide

Author: Cheng Lian <[email protected]>

Closes #6749 from liancheng/java-sample-fix and squashes the following commits:

5b44585 [Cheng Lian] Fixes a minor Java example error in SQL programming guide

(cherry picked from commit 8f7308f)
Signed-off-by: Reynold Xin <[email protected]>

Author: liancheng

docs/sql-programming-guide.md

@@ -1475,7 +1475,7 @@ expressed in HiveQL.
 
 {% highlight java %}
 // sc is an existing JavaSparkContext.
-HiveContext sqlContext = new org.apache.spark.sql.hive.HiveContext(sc);
+HiveContext sqlContext = new org.apache.spark.sql.hive.HiveContext(sc.sc);
 
 sqlContext.sql("CREATE TABLE IF NOT EXISTS src (key INT, value STRING)");
 sqlContext.sql("LOAD DATA LOCAL INPATH 'examples/src/main/resources/kv1.txt' INTO TABLE src");