Java EE 5 SDK

javax.persistence
Annotation Type UniqueConstraint


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

This annotation is used to specify 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:
Java Persistence 1.0

Required Element Summary
 String[] columnNames
          (Required) An array of the column names that make up the constraint.
 

Element Detail

columnNames

public abstract String[] columnNames
(Required) An array of the column names that make up the constraint.


Java EE 5 SDK

Copyright 2006 Sun Microsystems, Inc. All rights reserved.

This documentation is deprecated and will be removed in the next release of WebLogic Server.


Oracle Fusion Middleware Sun Microsystems Persistence API Reference (DEPRECATED)
12c Release 1 (12.1.1)
Part Number E24399_01