"Joshua D. Drake" <jd@commandprompt.com> writes:
> However if you do the following:
> create table foo (foo serial not null, bar text);
> create sequence foo_seq;
> alter table foo alter column foo set default nextval('foo_seq');
This is flat out pilot error: you do not get to mess with the default
expression of a SERIAL column, because it's part of the internal
implementation of the SERIAL pseudo-type. If I were going to do
anything about it, I'd patch ALTER TABLE to refuse the above command.
regards, tom lane