Executing Procedure with default parameters !!

Question

hi want a small help ...
I have a
procedure p1(p1 in number default 2, p2 in number default 3)
begin
end;
When the procedure will be called without passing parameters it will execute with default parameters.
That time I want to dispay message saying
" AS paramters are not passed, procedure is being executed with foll. default parameters:
Param 1 = 2
Param 2 = 3 "
Now issue is how do I capture this condition that , the parameters are being passed and it is using default parameters ?
Thanks

Answer 1

The IF NOT NULL check for the parameters cannot be inside the same procedure becuase when you reach that statement, even though the parameter are not passed to this procedure, at that stage, the parameters will acquire the dfault values already assigned to them. So you never reach the else part of it.
That;s why i said, use third parameter and assign the value to this third parameter from the calling environment.
here is the short test case that might help you to understand better.
SQL> create or replace procedure myproc
  2  (p1               number default 1
  3  ,p2               number default 2
  4  ,parameter_passed char default 'Y') is
  5  begin
  6    if parameter_passed = 'Y' then
  7      dbms_output.put_line('Input values are :'||p1||'='||p2);
  8    else
  9      dbms_output.put_line('Default values are :'||p1||'='||p2);
10    end if;
11  end;
12  /
Procedure created.
SQL> PROMPT Test for Case one with input parameter values
Test for Case one with input parameter values
SQL>
SQL> declare
  2   param1 number := 5;
  3   param2 number := 6;
  4  begin
  5   if param1 is not null and param2 is not null then
  6     myproc(param1,param2);
  7   else
  8     myproc(parameter_passed=>'N');
  9   end if;
10  end;
11  /
Input values are :5=6                                                          
PL/SQL procedure successfully completed.
SQL>
SQL> PROMPT Test for Case two with no parameter values
Test for Case two with no parameter values
SQL>
SQL> declare
  2   param1 number := null;
  3   param2 number := null;
  4  begin
  5   if param1 is not null and param2 is not null then
  6     myproc(param1,param2);
  7   else
  8     myproc(parameter_passed=>'N');
  9   end if;
10  end;
11  /
Default values are :1=2                                                        
PL/SQL procedure successfully completed.
SQL>