I got this problem. I have one class(parent) which is extended by other class (child).
When I query the parent the child gets queried with the outer join.
How do I prevent this?
I went through the documentation. And tried every permutation and combination with proxies and discriminator value. But with no result.
I don't understand how the discriminator-value and proxy works.
I am using Hibernate 2.0.3.


The mapping file is something like this.

<hibernate-mapping>
<class name="org.presci.extender.Parent" table="tbl_parent" proxy="org.presci.extender.Parent" discriminator-value="org.presci.extender.Parent">
<id name="id">
<generator class="identity"/>
</id>
<property name="fname"/>
<property name="lname"/>


<joined-subclass name="org.presci.extender.Child" table="tbl_child" proxy="org.presci.extender.Child">
<key column="parentid"/>
<property name="address"/>
</joined-subclass>
</class>
</hibernate-mapping>

You can't proxy a subclass in Hibernate. And when you query an instance of the parent, you have no way of knowing that it is not an instance of the subclass.


Try to remodel this as a one-to-one association if thats what it really is (looks like it).

Thank you sir,
I really appreciate.

The project doesn't requires delegation design pattern.
The query being generated works really fantastic when I query any of the child.
The problem is when I query the parent. I got this two childs which are inherited from the same parent. This two childs also gets queried but I don't want this to happen. I want something like lazy binding on the childs.

I really appreciate for your time. Hope you can help me.
Thanks
regards & respect
prasad chandrasekaran