[jboss-user] [EJB 3.0] - Re: Inheritence and EJBQL

tynor do-not-reply at jboss.com
Thu Sep 27 15:53:52 EDT 2007

I don't want to be a pest, but could someone at least tell me if what I'm trying to do should work (hence I should try harder to understand what I've misconfigured), or if I should just give up and use my work around (separate queries for each subclass)?

I'm using JBoss AS 4.2.1.GA and Seam 2.0.0.CR1


anonymous wrote : 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. 
  | Code: 
  | 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.: 

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