How to get procedure paramater value dynamicly ?

Question

How to get procedure paramater value if the parameter name is stored in a text variable?
example:
create or replace circle_area(p_par1 varchar2, p_par2 varchar2) IS
begin
for v_col in (select * from USER_ARGUMENTS where OBJECT_NAME = $$plsql_unit order by position) loop
DBMS_OUTPUT.PUT_LINE('column_name : ' || v_col.ARGUMENT_NAME);
--v_col.ARGUMENT_NAME contains the parameter name.
Q1: how to get value of the parameter dynamicly?
Q2: how to get value of procedure parameter which name is stored in a text variable?
end loop;
end;
thanks for help
Cecak

Answer 1

Let me explain it again what I need using different words.
I need to write an universal code which will be able to identify name and value of parameters of called procedure/function.
It means I do not want to hardcode the list of all procedure/function parameters into one command DBMS_OUTPUT.PUT_LINE('p_par1 is '||p_par1||', p_par2 is '||p_par2.....) placed as first statement of a monitored procedure/function.
If a new verison of the same procedure/function having one additional parameter is compiled I would not need to modify the first command of the procedure/function to show name and value of the additional parameter because it would be done dynamicly.
SQL> create or replace procedure procedure1(p_par1 varchar2, p_par2 varchar2) IS
2 begin
3 for v_col in (select * from USER_ARGUMENTS where OBJECT_NAME = $$plsql_unit order by position)
loop
4 DBMS_OUTPUT.PUT_LINE('column_name : ' || v_col.ARGUMENT_NAME);
5 end loop;
6 end;
7 /
Procedure created.
SQL> set serveroutput on size 10000
SQL> begin
2 procedure1('par1','par2');
3 end;
4 /
column_name : P_PAR1
column_name : P_PAR2
PL/SQL procedure successfully completed.
How can I get value of the procedure parameters if the parameter's names are stored in a text variable?
My DB version is:
SQL> select * from v$version;
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
Thanks
Cecak