update « Default « JPA Q&A

1. Hibernate update with default value    stackoverflow.com

after some research i haven't found a solution. I need a query like this in Hibernate:

UPDATE table_name SET field=DEFAULT

2. PojoExporter, set default value, insert, update, UserType    forum.hibernate.org

I want to be able to set a default value if nothing is specified for that field. After reading some topics on this forum I've understood that I can use a UserType to do that. A default value Here is also a fragment from the class DefaultValueUserType public void nullSafeSet(PreparedStatement preparedStatement, Object value, ...

3. If the dynamic-update is very good then why default to false    forum.hibernate.org

Dynamic update works within the session scope. i.e., you do openSession(), either load the object or use select-before-update to the session and then set the attributes of the object with the new values. THe proxy recognizes the attributes that are dirty and can generate the sql for only those attributes. However, this requires careful analysis of the problem at hand. If ...

4. Update Associate Objects - Default Behaviour of Hibernate ??    forum.hibernate.org

Wondering how update works in case of associated objects. Let say if Parent object ( in my case DeviceType) is associated with 3 records of Child object ( in my case Role) . During update, if i add or delete a Role from the User Interface, i have observed the default behaviour of Hibernate is to "delete the exsisting records from ...