Hi, all- I was playing around with joined-subclasses, and I was very happily surprised to see that returned an instance of the correct subclass. I was just wondering what sort of performance I could expect from this method of retrieval as a) the number of persisted instances and b) the number of joined subclasses grows.

Thanks!

Well basically you will get a join for every subclass of the class queried. The number of returned rows will be the number of persisted instances. (Both provided you don't outer join fetch any associations)

Thanks for the quick response... Is there some way (within Hibernate) to use a discriminator or the like to make sure that Hibernate only performs the join for the appropriate subclass?