[SPARK-14525][SQL] Make DataFrameWrite.save work for jdbc

## What changes were proposed in this pull request?

This change modifies the implementation of DataFrameWriter.save such that it works with jdbc, and the call to jdbc merely delegates to save.

## How was this patch tested?

This was tested via unit tests in the JDBCWriteSuite, of which I added one new test to cover this scenario.

## Additional details

rxin This seems to have been most recently touched by you and was also commented on in the JIRA.

This contribution is my original work and I license the work to the project under the project's open source license.

Author: Justin Pihony <justin.pihony@gmail.com>
Author: Justin Pihony <justin.pihony@typesafe.com>

Closes #12601 from JustinPihony/jdbc_reconciliation.

1 files changed, 5 insertions, 1 deletions

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 4ac5fae566..71bdd19c16 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1100,9 +1100,13 @@ CREATE TEMPORARY VIEW jdbcTable
 USING org.apache.spark.sql.jdbc
 OPTIONS (
   url "jdbc:postgresql:dbserver",
-  dbtable "schema.tablename"
+  dbtable "schema.tablename",
+  user 'username', 
+  password 'password'
 )
 
+INSERT INTO TABLE jdbcTable 
+SELECT * FROM resultTable
 {% endhighlight %}
 
 </div>