I am using hibernate 3.1

The question is can discriminator be used inside multi-column unique constraint?
I know it can be used inside composite-id.
If it can be used in that way please how. I haven been able to find any solution in manual.
Many thanks.
Kruno.

It can, just discriminator property inside multi-column unique constraint must have atribute insert="false" update="false"

example:
<discriminator column="tip" type="string" />
<properties name ="index" unique="true">
<many-to-one name="korisnik" class="orka.mkor.mapping.poduzeca.Korisnik" not-null="true"/>
<many-to-one name="dokument" not-null="true"/>
<property name="broj" />
<property name="godina"/>
<property name="tip" insert="false" update="false"/>
<many-to-one name="obracunskaJedinica"
class="orka.mkor.mapping.poduzeca.ObracunskaJedinica"
not-null="true"/>
</properties>