JPA Annotation

UniqueConstraint

Implemented Interfaces:
Annotation
Specifies that a unique constraint is to be included in the generated DDL for a primary or secondary table. 
Example:
    @Entity
    @Table(
        name="EMPLOYEE",
        uniqueConstraints=
            @UniqueConstraint(columnNames={"EMP_ID", "EMP_NAME"})
    )
    public class Employee { ... }
 
Since:
JPA 1.0
Public Annotation Attributes
String[] columnNames default null
 (Required) An array of the column names that make up the constraint.
 
Since:
JPA 1.0
String name default ""
 (Optional) Constraint name.
 A provider-chosen name will be chosen if a name is not specified. 
Since:
JPA 2.0