Question

I have a problem with my trigger. It returns “no data found” and i don’t know how to resolve it. Can you help me ?

create or replace
TRIGGER nb_action
    AFTER INSERT ON Message
  FOR EACH ROW
DECLARE
    vAuteur integer;
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
    SELECT id_auteur INTO vAuteur FROM Message where id_message = :new.id_message;
  UPDATE Utilisateur SET nb_action=nb_action+1 where id_utilisateur=vAuteur;
END ;

Answer 1

Since you have PRAGMA AUTONOMOUS_TRANSACTION; in that trigger it means that it can’t see the row just inserted because it is in a different not yet committed transaction thus your SELECT doesn’t return any data…

try

create or replace
TRIGGER nb_action
    AFTER INSERT ON Message
  FOR EACH ROW
DECLARE
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
  UPDATE Utilisateur SET nb_action=nb_action+1 where id_utilisateur=:new.id_auteur;
END ;