SQL> create table dropme_t (some number, awesome number(1) generated always as (nvl2(some,1,0)));

Table created.

SQL> insert into dropme_t(some) values(100);

1 row created.

SQL> insert into dropme_t(some) values(null);

1 row created.

SQL> select * from dropme_t;

      SOME    AWESOME
---------- ----------
       100          1
                    0
SQL> alter table dropme_t modify partition by list (awesome) (partition p1 values (1), partition p2 values(0));

Table altered.