Does Hibernate allow mix table class hierarchy?
Hibernate supports all three basic inheritance mapping strategies: table per class hierarchy. table by subclass. table by concrete class.
Table of Contents
What is inheritance mapping?
Inheritance . The following mapping strategies are used to map the entity data to the underlying database: Single table per class hierarchy. One table per concrete entity class.
Which of the following are examples of Hibernate properties?
Configuring the properties file
- hibernate.connection.driver_class= oracle.jdbc.driver.OracleDriver.
- hibernate.connection.url= jdbc:oracle:thin:@localhost:1521:xe.
- hibernate.connection.username= system.
Which of the following is not an inheritance mapping strategy?
Which of the following is not an inheritance mapping strategy? Explanation: Table per class is not an inheritance mapping strategy.
What is inheritance mapping in Hibernate with an example?
We can map the inheritance hierarchy classes with the database table. There are three inheritance mapping strategies defined in hibernate: Table per hierarchy. Table by class of concrete.
How to create a table by subclass in hibernate?
The class element is used to map the child class to the parent using the relationship of primary key and foreign key. In this example, we are going to use the hb2ddl.auto property to automatically generate the table.
How is merge inheritance used in hibernate inheritance?
The mixed inheritance approach is done in two ways. They are, The following example shows how to handle merge table by class hierarchy with table type inheritance by subclass. For any of these assignment strategies, a polymorphic association is assigned to the root payment class using .
How are parents and subclasses mapped in hibernate?
In the case of table by subclass, the tables assigned to the subclass are related to the table assigned to the parent class by primary key and foreign key relationship. The class element is used to map the child class to the parent using the relationship of primary key and foreign key.
Where are subclass-specific fields stored in hibernate?
So we have 3 tables; PERSON, EMPLOYEE, and OWNER to persist the class data. Note that there is a foreign key relationship between the subclass tables and the superclass table. Therefore, common data is stored in the PERSON table, and subclass-specific fields are stored in the EMPLOYEE and OWNER tables.