javax.persistence
Annotation Type UniqueConstraint

@Target(value={})
@Retention(value=RUNTIME)
public @interface UniqueConstraint

The UniqueConstraint annotation is used to specify that a unique constraint is to be included in the generated DDL for a primary or secondary table.

Since:

JPA 1.0 version.

Author:

Florent Benoit

See Also:

JPA 2.0 specification

Required Element Summary

String[]

columnNames (Required) An array of the column names that make up the constraint.

Optional Element Summary

String

name (Optional) Constraint name.

Element Detail

columnNames

public abstract String[] columnNames

(Required) An array of the column names that make up the constraint.

name

public abstract String name

(Optional) Constraint name.

Since:

JPA 2.0 version.

Default:

""