> > You can set a sequence 'nextval' with the following statement :
> >
> > SELECT setval('XXX_YYY_seq',0);
>
> The statement above will not work (... at least, it will not work in
> PostgreSQL 7.3.1 -- I don't know if the new version has changed this
> behavior...but I doubt it). You have to use something like
I use a statement like "SELECT setval('XXX_YYY_seq',0)" myself. It
definitely works in 7.4(+).
> CREATE OR REPLACE FUNCTION public.set_sequence(name, int4)
> RETURNS int4 AS
> '
> DECLARE
> l_sequence_name ALIAS FOR $1;
> l_last_value ALIAS FOR $2;
> BEGIN
> IF l_last_value = 0 THEN
> PERFORM setval(l_sequence_name,1, False);
> ELSE
> PERFORM setval(l_sequence_name,l_last_value);
> END IF;
> RETURN 0;
> END;'
> LANGUAGE 'plpgsql' VOLATILE;
>
>
> >
> > XXX is the table name.
> > YYY is the name of the field containing the 'serial' value.
> >
> > The next value inserted in the table will then have a (serial) value of
> > '0' or '1', I am not entirely sure which (I think '1').
> > Alexander Priem.
>
> --Berend Tober
