Re: implementing check-in/check-out of an items table

On Fri, 20 May 2011 11:37:36 -0500,
Jack Christensen <jackc@hylesanderson.edu> wrote:

[...]

> In a similar project I worked on start time for a loan was always the
> current time so overlaps weren't an issue. I don't have any firsthand
> experience with them, but it sounds like what you want are exclusion
> constraints.

> http://www.depesz.com/index.php/2010/01/03/waiting-for-8-5-exclusion-constraints/

This lead to a more general solution presented nicely by Jeff Davis:

http://pgfoundry.org/projects/temporal
http://www.slideshare.net/pgconf/not-just-unique-exclusion-constraints

Cheers,

--
Seb