[jboss-dev-forums] [Design of EJB 3.0] - Joined Subclass Inheritance Strategy Problem

[evanzeng]

I am using Seam in a very important project of my company. In my project I need a base entity class and it has more than ten sub entity classes. I don't want to use single table  strategy because the number of fields of the sub entities vary widely. But if I use the joined subclass strategy, a query for the base entity will always be polymorphic and will join all the sub entity table. This is very inefficient apparently. Is it possible to avoid this problem? 

Thanks.

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