ALTER TABLE acl_class
    ADD CONSTRAINT acl_class_unique UNIQUE (class);
ALTER TABLE acl_sid
    ADD CONSTRAINT acl_sid_unique UNIQUE (sid, principal);
ALTER TABLE acl_object_identity
    ADD CONSTRAINT acl_object_identity_unique UNIQUE (object_id_class, object_id_identity);
ALTER TABLE acl_entry
    ADD CONSTRAINT acl_entry_unique UNIQUE (acl_object_identity, ace_order);
