[cx-oracle-users] Can't get nextval

[Antonio B. M. <ant...@li...>]

Hi all:
I've a big problem because I neet to get the nextval in a sequence, and t=
he=20
query returns an empty sequence.=20
If I make a query like : INSERT INTO XXXX VALUES (users_seq.nextval, ...)
All works perfectly, but If I try to do this query in two steps:
SELECT users_seq.nextval FROM XXXX
INSERT INTO XXXX VALUES (new_id, ...)

the SELECT returns [].
(This query works with sqlplus)

What I'm doin wrong?