Can EJBQL be used to query polymorphically? I cannot find any examples in the spec or in Bill Burke's EJB3 book, and my attempts are always returning null. l = entityManager.createQuery("SELECT s FROM Security s").getResultList(); Here I'm trying to find all rows of all security subclasses. Even though the database has many such entries, the query always returns null. I can find each subclass independently - eg.: l = entityManager.createQuery("SELECT s FROM SecurityLoan s").getResultList(); | l = entityManager.createQuery("SELECT s FROM SecurityEquity s").getResultList(); but would like to write a single query to get all objects, regardless of subclass. My entities are declared using JOINED inheritence: | @Entity | @Table(name = "security") | @Inheritance(strategy = InheritanceType.JOINED) | public class Security implements java.io.Serializable { | .... | @Entity | @Table(name = "security_loan") | @PrimaryKeyJoinColumn(name="security_id") | public class SecurityLoan extends Security implements java.io.Serializable { | .... | @Entity | @Table(name = "security_equity") | @PrimaryKeyJoinColumn(name="security_id") | public class SecurityEquity extends Security implements java.io.Serializable { | Is this possible? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4087551#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...