Map oracle error

Question

Is there a way to map Oracle error to display a friendly error message to users?
For example, instead of displaying:
ORA-00001: unique constraint (GDB.INT_UK) violated
Have it map to some thing like:
Customer Id must be unique. The customer you try to add is already in the database.

Answer 1

The HTML DB Edit Process page has 3 boxes
1. Source - Put your source code here
2. Success message
3. Error message
Any unhandled exception in your PL/SQL code will cause HTML DB to go to an error page and show that error message (sqlerrm)
If you dont want that, handle all exceptions in your code either using named exceptions or predefined exceptions, map it to whatever user-friendly error message you want and put that in the Error message box.
So, for example, if my process source is
declare
file_not_found exception;
pragma exception_init(file_not_found,-20000);
invalid_format exception;
pragma exception_init(invalid_format,-20001);
begin
  :P7_ERROR_MESSAGE := 'Successfully executed';
  mypkg.myproc(...);
exception
when file_not_found or invalid_format then
    :P7_ERROR_MESSAGE := sqlerrm;
end;And then, in process error mesage, I have #SQLERRM# (not really expected since I am handling all known errors in the code itself), the success message has &P7_ERROR_MESSAGE.
This way, I get a error page only when a totally unexpected error is raised.
Hope this helps
Thanks