Package javax.persistence
Annotation Type UniqueConstraint
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@Target({}) @Retention(RUNTIME) public @interface UniqueConstraintSpecifies 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:
- 1.0
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Required Element Summary
Required Elements Modifier and Type Required Element Description java.lang.String[]columnNames(Required) An array of the column names that make up the constraint.
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description java.lang.Stringname(Optional) Constraint name.
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