Untested ideas (beware): Use an insert trigger that: curr_seq := select max(seq) from foo where field_id = NEW.field_id if curr_seq is null then NEW.seq := 0 else NEW.seq := curr_seq + 1
(You have to figure out how to build the trigger infrastructure...) If you need to do it on a table that is already populated, let us know. On Tue, Oct 14, 2008 at 9:21 AM, Bill Thoen <[EMAIL PROTECTED]> wrote: > Grzegorz Jas'kiewicz wrote: >> >> alter table foo add newid sequencial; >> >> alter table foo drop field_id; >> >> alter table foo rename newid to field_id; >> > I can't do that; I need to preserve the field_id values. > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general