I am using Hibernate3.1 and want to know how to lazy load my subclasses .

following is a sample of my mapping file

<class name="com.sit.cse.util.model.Supplier" optimistic-lock="version" table="Supplier">
<id name="id" column="ID" type="long">
<generator class="increment"/>
</id>
<property name="category" column="category" type="string" />
<property name="name" column="name" type="string" />
<property name="version" column="version" type="integer" />

<joined-subclass name="com.sit.cse.util.model.Expert" table="Expert">
<key column="id"/>
<property name="cv" column="cv" type="string" />
<property name="speciality" column="speciality" type="string" />
</joined-subclass>
</class>

I tried to use lazy="true" flag with Joined subclass but it does not seem to work.Each time I try to fetch the Supplier it uses an outer join get the Experts also which I don not want .

Is there some way of fixing this problem ?

Any help would be appreciated .

Hello,

Has anybody found a solution to this?

I have the same problem. I have a superclass and joined-subclasses like this:

class A
* joined-subclass B
* joined-subclass C

B and C extend A. When I make a query on A I always get a SQL query which makes an outer join with B and C. I am only interested in the data from A. B and C will be loaded when needed.

I tried everything. Lazy="true" doesn't have effect on the joined-sublass. The polymorphic attribute "explicit" doesn't either. Also, setting the "class" attribute in the criteria query brings nothing.

The problem is that table A is really big, and also B and C. This results in a very slow query.

How can this be solved?

Greetings
Jan

Interested in the solution for this as well... if this is not by design.