Errore ORA-04098 creating Trigger.

Question

hi,
I have some problem creating a simple trigger for auto increment of an "Id_column".
I create a sequence: create sequence "sequence_name" minvalue 1 maxvalue 999 increment by 1
then create trigger: create trigger "trigger_registry"
before insert on "registry"
for each row
when (new.ID_registryA is null)
begin
select "Sequence_name".nextval into: new.ID_registry
FROM DUAL;
END;
and finally I try to insert something into registry table but I got this error: ORA-04098: il trigger 'SYSTEM.TRIGGER_NAME' is invalid and failed re-validation.
Has anybody got any idea about this error?

Answer 1

user3745218 wrote:
ok, so i've corrected all but the error is still the same: ORA-04098: il trigger 'SYSTEM.TRIGGER_NAME' is invalid and failed re-validation.
Unless you post SQL*PLus snippet like this, we can't help you:
SQL> create or replace
  2  trigger emp1_bir
  3  before insert
  4  on emp1
  5  for each row
  6  when (new.sal < 0)
  7  begin
  8  select sss.nextval into :new.empno from dual;
  9  end;
10  /
Warning: Trigger created with compilation errors.
SQL> show error trigger emp1_bir
Errors for TRIGGER EMP1_BIR:
LINE/COL ERROR
2/1      PL/SQL: SQL Statement ignored
2/8      PL/SQL: ORA-02289: sequence does not exist
SQL> SY.