mstory@uchicago.edu wrote:
> I'm using v. 7.4.2, and am encountering a problem with serial types. On an
> insert into a table that results in failure for any number of reasone (mostly
> violation of contraints) I've found that the Sequence for the column of type
> serial will still bump the value up once.
This is FAQ item number 4.15.4:
http://www.postgresql.org/docs/faqs/FAQ.html#4.15.4
HTH,
Mike Mascari