Hi.
I have an optional OneToOne relationship between my entities and since it is optional i want to have several records in the underlying table with this relation set to NULL.

 @Entity...
 @Table(name = "A, uniqueConstraints = {})
 public class A {
 @OneToOne(optional = true)
 @JoinColumn(name = "b_id", unique = false, nullable = true)
 private B b;
 }

Despite all my attempts JBoss sets unique constraint on the b_id column which thus prohibits insertion of more that one record with empty b_id.
I use MS SQL as db, if it matters. Any suggestions?

wbr, eugen.