Sorry, there is a "bug" in my statement (according to debug issues), the
correct statement should be:
CREATE FUNCTION test() RETURNS opaque AS 'BEGIN IF new.cno1 IS NULL THEN IF new.cno2 IS NULL THEN
new.cno1 := trim(new.cno3); ELSIF new.cno3 IS NULL THEN new.cno1 :=
trim(new.cno2); ELSE new.cno1 := trim(new.cno2)||trim(new.cno3); END IF; END
IF; RETURN new; END;'
LANGUAGE 'plpgsql';
BTW, for getting correct results, you should define cno1 as long as the
maximum length of cno2 and cno3 together (20).
Regards, Jens
Jens Hartwig schrieb:
>
> > hi,how to set default filed+field
> >
> > create table "table1"(
> > "cno1" char(10) default NEW.cno2+NEW.cno3,
> > "cno2" char(10) ,
> > "cno3" char(10)
> > );
> >
> > I try pl/pgsql and pl/tcl NOT RUN,
> >
> > thanks
>
> Try the following:
>
> CREATE FUNCTION test() RETURNS opaque AS
> 'BEGIN
> IF new.cno1 IS NULL THEN
> IF new.cno2 IS NULL THEN
> new.cno1 := substr(new.cno3,1,3);
> ELSIF new.cno3 IS NULL THEN
> new.cno1 := substr(new.cno2,1,3);
> ELSE
> new.cno1 := substr(new.cno2,1,3)||substr(new.cno3,1,3);
> END IF;
> END IF;
> RETURN new;
> END;'
> LANGUAGE 'plpgsql';
>
> CREATE TRIGGER test_trg
> BEFORE INSERT OR UPDATE ON table1
> FOR EACH ROW
> EXECUTE PROCEDURE test();
>
> INSERT INTO table1 (cno2, cno3) values ('abc', 'def');
>
> SELECT * FROM table1;
>
> Best regards, Jens Hartwig
=============================================
Jens Hartwig
---------------------------------------------
debis Systemhaus GEI mbH
10875 Berlin
Tel. : +49 (0)30 2554-3282
Fax : +49 (0)30 2554-3187
Mobil : +49 (0)170 167-2648
E-Mail : jhartwig@debis.com
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