触发器在Oracle SQL Developer上不起作用

Question

I am getting an issue with execution of triggers. I am providing below the code for 1 of the triggers.

create or replace
TRIGGER abc_tr01
  BEFORE INSERT
  ON tablename
  FOR EACH ROW

BEGIN
  UPDATE tablename
     SET dtCreatedDate = SYSDATE
     WHERE incidentid = ( SELECT :NEW.incidentid 
                            FROM DUAL  );
END;

This trigger is supposed to update 1 of the columns ( dtCreatedDate ) of the tablename table and stores SYSDATE in it before an insertion is carried out on that table.

It is failing to update the dtCreatedDate field however.

I have checked that the trigger is enabled. It is getting fired at the insertion time too. I checked that by injecting a syntax error in the trigger code which was promptly detected.

I am using SQL Developer 3.0.

Please help.

Answer 1

No need for the UPDATE statement:

create or replace
TRIGGER abc_tr01
  BEFORE INSERT
  ON tablename
  FOR EACH ROW
BEGIN
  :new.dtCreatedDate := sysdate;
END;
/