When defining a data store in ODI metadata, is it possible to add a primary key even if it does not physically exist on the related database catalog?

When defining a data store in ODI metadata, is it possible to add a primary key even if it does not
physically exist on the related database catalog?

A.
No, you can only reverse-engineer existing constraints.

B.
No, you can only flag non-null conditions to be checked.

C.
Yes, by adding constraints to the datastore diagram.

D.
Yes,by adding constraints on the datastore.

Explanation: