Did you set the hibernate.dialect property in hibernate.cfg.xml? Besides the changes you have already made, there should also be an entry for the dialect. Use org.hibernate.dialect.OracleDialect for Oracle 8 and earlier, org.hibernate.dialect.Oracle9Dialect for Oracle 9 and 10. <!-- SQL dialect --> | <property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property> Regards, Martin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4032632#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...