Problem with creating virtual column

Question

Hello,
We've got problem with creating virtual column.
There is table R_T that contain columns R_ID and L_ID, we would like to create virtual column RL_ID that contains sth like 'R_ID-L_ID' (R_ID, L_ID and RL_ID are varchars).
According documentation we've tried:
alter table R_T add column (RL_ID varchar2(60) generated always as (R_ID||'-'||L_ID) VIRTUAL)
but getting
ORA-00904: : invalid identifier
00904.00000 - "%s: invalid identifier"
Have no idea where is the problem.
Table, columns names are little different but contains only capital letters A - Z and underscore "_".
Has anyone idea?
Thanks a lot.

Answer 1

Strange...
This does work for me :
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as dev
SQL>
SQL> create table r_t (
  2   r_id varchar2(25),
  3   l_id varchar2(25)
  4  );
Table created
SQL> insert into r_t (r_id, l_id) values('R','L');
1 row inserted
SQL> alter table r_t add (rl_id varchar2(60) generated always as (r_id||'-'||l_id) virtual);
Table altered
SQL> select * from r_t;
R_ID                      L_ID                      RL_ID
R                         L                         R-L
SQL>