Handling Exception

Question

Hi,
I would like to write a procedure to handle any unhandled exception raised by any query,but i dont want to make call to that in each existing procedure or function.
So is there any schema level trigger available for where i can call this procedure ,
Whether its possible in oracle or not.
Regards,
Sandeep

Answer 1

So i am looking for easy way out ...putting something at one place for everything ... The closest you will get to easy is to create a system level trigger whioch fires after a SERVERERROR event. Unfortunately there are several rather important errors for which it does not fire.
SQL> CREATE OR REPLACE TRIGGER log_errors AFTER SERVERERROR ON DATABASE
  2  BEGIN
  3    dbms_output.put_line('generic error handling='||sys.server_error(1));
  4  END;
  5  /
Trigger created.
SQL> var x varchar2(10)
SQL> var n number
SQL> begin
  2     select to_number(dummy) into :n
  3     from dual;
  4  end;
  5  /
generic error handling=1722
begin
ERROR at line 1:
ORA-01722: invalid number
ORA-06512: at line 2
SQL> begin
  2     select dummy into :x
  3     from dual
  4     where dummy != 'X';
  5  end;
  6  /
begin
ERROR at line 1:
ORA-01403: no data found
ORA-06512: at line 2
SQL> begin
  2     select ename into :x
  3     from scott.emp
  4     where deptno = 10;
  5  end;
  6  /
begin
ERROR at line 1:
ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at line 2
SQL> This is covered in the documentation. Find out more.
Cheers, APC