Hibernate version:2.0

Mapping documents:



<hibernate-mapping package="com.test.impl">
<class name="User" proxy="User" table="TEMP_USER">
<id name="id" type="int" unsaved-value="0" column="USER_ID">
<generator class="increment"/>
</id>
<property name="adminRole" type="true_false" column="ADMIN_ROLE"/>
<property name="userName" column="USER_NAME"/>
<set name="addresses" table="TEMP_ADDRESS" inverse="true" batch-size="20" cascade="save-update">
<key column="USER_ID"/>
<one-to-many class="Address" />
</set>
</class>
<class name="Address" table="TEMP_ADDRESS">
<id name="id" type="int" unsaved-value="0" column="ADDRESS_ID">
<generator class="increment"/>
</id>
<property name="place" column="PLACE"/>
</class>

</hibernate-mapping>




Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:DB2 7.0

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:


With the above mapping document Hibernate created the tables with the following structure:

create table "NEWWMOS"."TEMP_USER" (
"USER_ID" INTEGER not null,
"ADMIN_ROLE" CHAR(1),
"USER_NAME" VARCHAR(255),
constraint "NEWWMOS"."SQL020111200745890" primary key ("USER_ID"));

create table "NEWWMOS"."TEMP_ADDRESS" (
"ADDRESS_ID" INTEGER not null,
"PLACE" VARCHAR(255),
"USER_ID" INTEGER,
constraint "NEWWMOS"."SQL020111200746040" primary key ("ADDRESS_ID"));



then I dropped the tables and changed the inverse attribute to false.
and executed the program again. The tables are created with the following structure:

create table "NEWWMOS"."TEMP_USER" (
"USER_ID" INTEGER not null,
"ADMIN_ROLE" CHAR(1),
"USER_NAME" VARCHAR(255),
constraint "NEWWMOS"."SQL020111202620620" primary key ("USER_ID"));



create table "NEWWMOS"."TEMP_ADDRESS" (
"ADDRESS_ID" INTEGER not null,
"PLACE" VARCHAR(255),
"USER_ID" INTEGER,
constraint "NEWWMOS"."SQL020111202620810" primary key ("ADDRESS_ID"), constraint "FKEA5AF6692206F20F" foreign key ("USER_ID") references "TEMP_USER" ("USER_ID"));


So foreign-key relationship is maintained when inverse="false" and not when inverse="true"...

How is it justified?
Does inverse="true" make sense only when the relation is bidirectional ie when many-to-one tag is present in the Address class tag.
If that is the case, why doesn't Hibernate throw any exception when inverse="true" is specified without any many-to-one relation?


Please help,
Thanks,
SSSS.

Yes.

Then why Hibernate does not throw exception when inverse is specified without any many-to-one relation?

any reasons for that?