I getting the following error, when I try to use a DBAppender:

ch.qos.logback.core.db.DriverManagerConnectionSource@7d8a8ce2 - Could not discover the dialect to use. java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection

at java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection

at  at oracle.jdbc.driver.T4CConection.logon(T4CConnection.java:419)

How do I manually set the sql dialect to use, in the logback xml configuration file (ie- xml tag name to use, etc...), assuming I am getting a dialect error?

Thank you

Jeff