Using d_boolean domain to return in stored procedure

Hi, I'm using the following domain which i found in the net to be used as a bool datatype:

create domain "D_BOOLEAN" as smallint default 0
check (value between 0 and 1);


I have a stored procedure that i would like to return a 1/0
so i have the following:

RETURNS
(
Success D_BOOLEAN
)

But i receive an error:
Token unknown -line 9, char 10
D_BOOLEAN

Am i using a domain wrong?

Thanks

I think that you can't assign a domain to "Success" ... try:

RETURNS ( Success INTEGER ) and set it to 0 or 1 depending on the result.