Hibernate Table Per Sub class Inheritance mapping using xml Tutorial 29

Hibernate tutorial By Maniram Yadav
Hibernate configuration file
hibernate.cfg.xml
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Hibernate Inheritance maping

In case of Table Per Concrete class, there will be three tables in the database having no relations to each other. There are two ways to map the table with table per concrete class strategy.

By union-subclass element
By Self creating the table for each class
In case of Table Per Subclass, subclass mapped tables are related to parent class mapped table by primary key and foreign key relationship.

The joined-subclass element of class is used to map the child class with parent using the primary key and foreign key relation.

In this example, we are going to use hb2ddl.auto property to generate the table automatically. So we don't need to be worried about creating tables in the database.



In case of table per subclass class, there will be three tables in the database, each representing a particular class.

The joined-subclass subelement of class, specifies the subclass.

The key sub-element of joined-subclass is used to generate the foreign key in the subclass mapped table. This foreign key will be associated with the primary key of parent class mapped table.


For more detailed explanation watch the video

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