SINGLE_TABLE and

JOINED Inheritance mapping strategies.

The strategy and the discriminator column are only specified in the root of an entity class hierarchy or subhierarchy in which a different inheritance strategy is applied

If the DiscriminatorColumn annotation is missing, and a discriminator column is required, the name of the discriminator column defaults to "DTYPE" and the discriminator type to STRING()()()().

Examples

CopyC#

Example:

[Entity]
[Table(name="CUST")]
[Inheritance(strategy=SINGLE_TABLE)]
[DiscriminatorColumn(name="DISC", discriminatorType=STRING, length=20)]
public class Customer { ... }

[Entity]
public class ValuedCustomer extends Customer { ... }