Question

Hi I’m using sqldeveloper connected to an oracle server. I’m trying to change the date to the monday of that week in a trigger but it says Warning: execution completed with warning, can anyone see what I am doing wrong here?

CREATE OR REPLACE TRIGGER trg_week_menu
BEFORE INSERT OR UPDATE OF week_start ON week_menu FOR EACH ROW
BEGIN
  IF DATEPART(dw, :NEW.week_start) != 1 THEN
    SELECT DATEADD(ww, DATEDIFF(ww, 0, :NEW.week_start), 0)
    INTO :NEW.week_start
    FROM sys.dual;
  END IF;
END;

Thanks in advance! =)

Answer 1

It’s probably because datediff and dateadd are SQL-Server functions, not Oracle.

From what I understand you’re trying to do this should work:

CREATE OR REPLACE TRIGGER trg_week_menu
BEFORE INSERT OR UPDATE OF week_start ON week_menu FOR EACH ROW
BEGIN
   IF to_char(:new.week_start,'d') <> 1 THEN
      :new.week_start := next_day( :new.week_start - 7
                                 , 'MONDAY' );
   END IF;
END;
/

But in case I don’t understand what you’re trying to do. There’s a number of date functions in Oracle that you should probably be aware of.