@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD}) 
@Retention(RetentionPolicy.RUNTIME)
public @interface PrimaryKey
{
    /**
     * Name of the primary key constraint
     * @return the name of the primary key constraint
     */
    String name() default "";

    /**
     * Name of the column to use for the primary key
     * @return the name of the column to use for the primary key
     */
    String column() default "";

    /**
     * The column(s) for the primary key
     * @return the column(s) for the primary key
     */
    Column[] columns() default {};
}