How to get value and name of the n'th parameter in a pl/sql funct./proced.

Question

procedure test(name varchar2, birthdate date, zip number, country varchar2);
in procedure x I do
test('Michael Postmann', to_date('03.01.1983', 'DD.MM.YYYY'), 7461, 'AUSTRIA');
And this should htp.print the following:
test: name=Michael Postmann,birthdate=1983/01/03,zip=7461,country=AUSTRIA
In procedure test I want to know:
*) What is the name of myself (the procedure)
*) Optionally: Am I a procedure or a function?
*) How many Parameters do I have?
*) What are the values of them?
*) What are the names of them?
*) Optionally: What are the types of them?
What I actually want to do is:
I have a procedure for logging errors. So in my program I call this function frequently and I want it to log the current time, a string passed to the logging function, the client's ip, etc.... but it should also log a list of the parametrs and values of the procedure/function where the error occoured.
Is there any way to do this (I think in C this is done by argc and argv, but a string containing all the information (as you get it from the WebDb when something goes wrong) would be enough)?
Thx in advance,
Nomike aka Michael Postmann

Answer 1

Name of procedure or function can be retrieved using DBMS_UTILITY.FORMAT_CALL_STACK:
CREATE OR REPLACE FUNCTION fn_whoami (v_in varchar2)
RETURN varchar2
AS
v_stack varchar2(1000) DEFAULT DBMS_UTILITY.FORMAT_CALL_STACK;
v_job varchar2(500);
v_name varchar2(100);
BEGIN
v_job := SUBSTR(v_stack,INSTR(v_stack,'function'),256);
v_name := SUBSTR(v_job,1,INSTR(v_job,CHR(10))-1);
return v_name;
END fn_whoami;
select fn_whoami('1') from dual;
CREATE OR REPLACE PROCEDURE pr_whoami
AS
v_stack varchar2(1000) DEFAULT DBMS_UTILITY.FORMAT_CALL_STACK;
v_job varchar2(500);
v_name varchar2(100);
BEGIN
v_job := SUBSTR(v_stack,INSTR(v_stack,'procedure'),256);
v_name := SUBSTR(v_job,1,INSTR(v_job,CHR(10))-1);
dbms_output.put_line(v_name);
END pr_whoami;
exec pr_whoami;