UniqueConstraint (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence
Annotation Type UniqueConstraint

@Target(value={}) @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.

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.