Hibernate version: 3.1.2

Name and version of the database you are using:
Oracle 10G Rel 2

I'm using sample code to insert a parent / child record into the database by using the following mapping

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.test.common.cache.entry">
<class name="ParentHistEntry" table="PSPARENTHIST">
<id name="id" column="ID" unsaved-value="0">
<generator class="assigned"/>
</id>
<bag name="children" cascade="all">
<key column="PARENTID" not-null="true" />
<one-to-many class="ChildHistEntry" />
</bag>
<property name="parentName" column="PARENTNAME" type="string"/>
</class>
<class name="ChildHistEntry" table="PSCHILDHIST">
<id name="id" column="ID" unsaved-value="0">
<generator class="assigned"/>
</id>
<bag name="grandChildren" cascade="all">
<key column="CHILDID" not-null="true"/>
<one-to-many class="GrandChildHistEntry"/>
</bag>
<property name="childName" column="CHILDNAME"/>
</class>
<class name="GrandChildHistEntry" table="PSGRANDCHILDHIST">
<id name="id" column="ID" unsaved-value="0">
<generator class="assigned"/>
</id>
<property name="grandChildName" column="GRANDCHILDNAME"/>
</class>
</hibernate-mapping>

I set the ID's for the parent and all child records.
The parent get's inserted, but the children do not get inserted.
If I change the generator for the child table to native and do not set an id, the child record get's inserted into the database.

How do I set id's for the child and not have to explicitly save the child record using session.save(child). The following is a code excerpt

ParentEntry l_parent = new ParentEntry();
l_parent.setId(1);
.... (set's attribs for parent)
ChildEntry l_child = new ChildEntry();
l_child.setId(2);
List l_list = new ArrayList();
l_list.add(l_child);
l_parent.setChildren(l_list);

Session l_session = HibernateManager.currentSession();
Transaction l_tx = l_session.beginTransaction();
l_session.save(l_parent);
l_tx.commit();

Please let me know what I need to change to get this to work.

Thanks
Bharat

Use the version attribute - otherwise you need to call save.
see http://www.hibernate.org/hib_docs/v3/reference/en/html/mapping.html#mapping-declaration-version