Hi there,
if I use the union-subclass with quoted identifiers within the mapped tables, the quotes are not generated into the sql.
I had a closer look into org.hibernate.persister.entity.UnionSubclassEntityPersister.generateSubquery()

Here the buffer will be added by "buf.append( col.getName() );".
I think a col.getQuotedName() should help.

Is there any reason for the getName() or is it worth a Jira?

Regards
Darius