Exclude Extra Error Information from RAISE_APPLICATION_ERROR - oracle

Question

I have raised an error message in a PL/SQL trigger and it works fine except that it returns more than the error I specify to the application. In addition to the custom error I get information about the line that the error happened on and the trigger.
For example it will get
ORA-20111: There is a custom error here
ORA-06512: at "{schema_name}.{trigger_name}", LINE 2
ORA-04088: error during execution of trigger {schema_name}.{trigger_name}<br>
.Operation canceled.
What I actually want is:
ORA-20111: There is a custom error here
How do I remove the extra information from the error message before it is returned to my application? My testing code below...
CREATE OR REPLACE TRIGGER CUSTOM_ERROR
BEFORE INSERT OR UPDATE ON {SCHEMA_NAME}.{TABLE_NAME} FOR EACH ROW
BEGIN
RAISE_APPLICATION_ERROR(-20111, 'There is a custom error here');
END;

Answer 1

You could use RAISE_APPLICATION_ERROR.
For example,
SQL> DECLARE
2 custom_err EXCEPTION;
3 PRAGMA EXCEPTION_INIT( custom_err, -20099 );
4 BEGIN
5 raise_application_error( -20099, 'This is a custom error' );
6 EXCEPTION
7 WHEN custom_err THEN
8 dbms_output.put_line( sqlerrm );
9 END;
10 /
ORA-20099: This is a custom error
PL/SQL procedure successfully completed.
SQL>
PRAGMA EXCEPTION_INIT is to give a custom error number, which could vary in a range from -20001 to -20999
However, you need to take care of the already-defined exceptions from being raised.
For example,
SQL> DECLARE
2 custom_err EXCEPTION;
3 PRAGMA EXCEPTION_INIT( custom_err, -20099 );
4 v number;
5 BEGIN
6 SELECT empno INTO v FROM emp WHERE empno = 1234;
7 raise_application_error( -20099, 'This is a custom error' );
8 EXCEPTION
9 WHEN custom_err THEN
10 dbms_output.put_line( sqlerrm );
11 END;
12 /
DECLARE
*
ERROR at line 1:
ORA-01403: no data found
ORA-06512: at line 6
SQL>
There is a NO_DATA_FOUND exception thrown. You could suppress that, however, it will leave the error stack with additional messages.
SQL> DECLARE
2 custom_err EXCEPTION;
3 PRAGMA EXCEPTION_INIT( custom_err, -20099 );
4 v number;
5 BEGIN
6 SELECT empno INTO v FROM emp WHERE empno = 1234;
7 raise_application_error( -20099, 'This is a custom error' );
8 EXCEPTION
9 WHEN no_data_found THEN
10 raise_application_error( -20099, 'This is a custom error' );
11 WHEN custom_err THEN
12 dbms_output.put_line( sqlerrm );
13 END;
14 /
DECLARE
*
ERROR at line 1:
ORA-20099: This is a custom error
ORA-06512: at line 10
SQL>
I would always want to log the errors as verbose as possible. The raise_application_error is good for a custom message to be displayed on the application, however, I would log all the errors in the program.
Please have a look at:
dbms_utility.format_error_stack
dbms_utility.format_error_backtrace