syntax error on Function return setoff

Hi All,

                I have a working function that returns setoff record was created under porstgresql 9.6 but  when I try to create the same function under release 10 it gives me error type”recode” does not exist.  Therefore, I changed it to RETURNS SETOF table_name.column%varachar(7) I got syntax error.  Can anyone let me know the right syntax?

Thank you very much,

Garry