Sequence creation for Super Type and Sub Type (Parent-Child)

Question

Data Model is structured with Super Type-Sub Type Concept.When data is being inserted in the Super Type table, I will be using a sequence Supertype.NEXTVAL as Primary Key.Now the same sequence will be the Primary Key for Sub Type table also. Can I use Supertype.CURRVAL during insertion in Sub Type table?
If Yes, I have lot of records being created in Super Type table within a second. So before data is being inserted in Subtype table there may be chance of a row being inserted in Super Type table and if I use Supertype.CURRVAL it may lead to wrong data.
How can I make sure that Supertype Primary Key is being inserted as Primary key in sub type table?

Answer 1

What happens when you try it? Something like:
session1> select t_seq.nextval from dual;
   NEXTVAL
     40061
session2> select t_seq.nextval from user_objects;
   NEXTVAL
     40062
     40063
     40064
     <snip>
     40270
     40271
     40272
211 rows selected.
session1> select t_seq.currval from dual;
   CURRVAL
     40061john