Java JDBC -> SQL Server

Question

I'm trying to have a Java application talk to a Microsoft SQL Server database.

• I downloaded sqljdbc_4.0.2206.100_enu.tar.gz from the Microsoft web site as this isn't hosted in the normal Maven-style Java library repositories.
• I manually install in local Maven repository.
• I use the following super simple test code:
• I can access the database in SQLWorkbenchJ which is a Java based SQL query tool and get normal, instant responses to these SQL commands.
• The server is SQL Server 2005 on Windows 7.

• The client is Java 7. I've tried Java 8 as well with no difference.

    public static void superSimpleJdbcTest(String jdbcUrl, String user, String password) throws SQLException { try (Connection dbConnection = DriverManager.getConnection(jdbcUrl, user, password)) { System.out.println("opened connection"); try (Statement statement = dbConnection.createStatement()) { System.out.println("created statement"); System.out.println("executing create table command..."); statement.execute("create table something (id int primary key, name varchar(100))"); System.out.println("completed create table command"); System.out.println("executing insert command..."); statement.executeUpdate("insert into something (id, name) values (1, 'Brian')"); System.out.println("insert command completed"); } } } 

It sporadically works, but usually hangs on the create table command. If I comment out that, it hangs on the insert command. I can't imagine what is wrong.

Answer 1

When the SQLWorkbenchJ application was running, my simple Java test app, would open the connection and just hang forever on any SQL command without getting any errors.

As soon as I quit the SQLWorkbenchJ application, my simple Java test app ran perfectly as expected. That was really weird and I eventually stumbled on the answer.

I switched over to using RazorSQL as an SQL console and that doesn't seem to have any issues like this.

Answer 2

I have successfully used both the JTDS driver and the Microsoft driver (JDBC4). I have not tried the SQLWorkbenchJ , as I mostly use SQuirreL to test the drivers.