Звучит так, как будто вы хотите посмотреть ALL_ARGUMENTS
(или USER_ARGUMENTS
или DBA_ARGUMENTS
)
SQL> create or replace function f1( p_in in varchar2,
2 p_in_out in out number )
3 return number
4 is
5 begin
6 return 1;
7 end;
8 /
Function created.
SQL> ed
Wrote file afiedt.buf
1 select argument_name, position, in_out, data_type
2 from all_arguments
3 where object_name = 'F1'
4* and package_name is null
SQL> /
ARGUMENT_N POSITION IN_OUT DATA_TYPE
---------- ---------- --------- ----------
P_IN_OUT 2 IN/OUT NUMBER
P_IN 1 IN VARCHAR2
0 OUT NUMBER