Getting a handle to native Oracle Connection in Hibernate 4 to run a stored proc

Question

This is a follow-up to Executing native query with Hibernate 4.1

I\'ve tried the options in the listed answer but we get errors and are unable to unwrap the proxied

Answer 1

Option 2 code works correctly.

ie.

OracleConnection oracleConnection = connection.unwrap( OracleConnection.class );

The problem was we had 2 versions of ojbc.jar - one as a Jboss module and one within the EAR, hence the ClassCastException.

As mentioned in the comments, this code also works

oracle.jdbc.driver.OracleConnection oc = (oracle.jdbc.driver.OracleConnection) connection.getMetaData().getConnection();

Answer 2

Try the following

I had encountered the same issue. We were using spring and it has a class called NativeJdbcExtractor. It has many implementations and the following one works for TomCat. There is a specific implementation for Jboss called the JBossNativeJdbcExtractor

<bean id="jdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor"></bean>

In your DAO you can inject the bean and use the following method

protected NativeJdbcExtractor jdbcExtractor;
Connection conn=jdbcExtractor.getNativeConnection(oracleConnection);