@Target(value=TYPE)
 @Retention(value=RUNTIME)
public @interface DiscriminatorColumn

 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 { ... }
 

Since:

Java Persistence 1.0

See Also:

DiscriminatorValue

• Optional Element Summary

  Optional Elements

  Modifier and Type	Optional Element and Description
  String	columnDefinition (Optional) The SQL fragment that is used when generating the DDL for the discriminator column.
  DiscriminatorType	discriminatorType (Optional) The type of object/column to use as a class discriminator.
  int	length (Optional) The column length for String-based discriminator types.
  String	name (Optional) The name of column to be used for the discriminator.

• Element Detail

  • name

    public abstract String name

    (Optional) The name of column to be used for the discriminator.

    Default:

    "DTYPE"

• • discriminatorType

    public abstract DiscriminatorType discriminatorType

    (Optional) The type of object/column to use as a class discriminator. Defaults to DiscriminatorType.STRING.

    Default:

    javax.persistence.DiscriminatorType.STRING

• • columnDefinition

    public abstract String columnDefinition

    (Optional) The SQL fragment that is used when generating the DDL for the discriminator column.

    Defaults to the provider-generated SQL to create a column of the specified discriminator type.

    Default:

    ""

• • length

    public abstract int length

    (Optional) The column length for String-based discriminator types. Ignored for other discriminator types.

    Default:

    31