d L. wrote:
This works on 7.3.4:
CREATE TABLE foo (id SERIAL, starttime TIMESTAMP, endtime TIMESTAMP);
CREATE FUNCTION adjust_end_time() RETURNS "trigger" AS ' BEGIN IF NEW.endtime ISNULL THEN NEW.endtime := NEW.starttime; END IF; RETURN NEW; END;' LANGUAGE plpgsql;
CREATE TRIGGER foo_trigger BEFORE INSERT ON foo FOR EACH ROW EXECUTE PROCEDURE adjust_end_time ();
INSERT INTO foo(starttime, endtime) VALUES (now(), now()); INSERT INTO foo(starttime) VALUES (now());
SELECT * FROM foo;
On Monday February 9 2004 9:24, Barbara Lindsey wrote:
I have a case where I am collecting a "Start Date" and an "End Date". I would like to default the "End Date" to the "Start Date" value if only the "Start Date" is entered. I tried setting this as default on the table, but it was not permitted. So, now I am trying to figure out how to do it with a trigger or trigger/function combination.
I tried doing it with a rule using "INSTEAD" on INSERT, but that gave an "endless recursion" error, which did make ssense after I looked at it more closely.
I also tried making a trigger, which called a function that changed the value of the NEW.enddate to the NEW.startdate value if NEW.enddate is NULL, but I got an error saying that the NEW. values were not available yet (doing trigger BEFORE INSERT).
Has anyone else done something like this, and if so, what approach worked for you? Thanks. Barb
-- Barbara E. Lindsey, COG RDC Phone: (352) 392-5198 ext. 314 Fax: (352) 392-8162
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