On 8 February 2016 at 08:04, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: > Geoff Winkless <pgsqladmin@xxxxxxxx> writes: >> On 31 January 2016 at 19:53, David G. Johnston >> <david.g.johnston@xxxxxxxxx> wrote: >>> A PRIMARY KEY enforces a UNIQUE, NOT NULL constraint and additionally allows >> [snip] > >> I would just remove the whole paragraph. A primary key does what it >> does, a unique constraint does what it does. I'm not really sure why >> you need to link them. > > I think it is useful to compare them; the only problem is claiming that > they're equivalent. > > I've applied some doc updates based on this discussion. > > http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=c477e84fe2471cb675234fce75cd6bb4bc2cf481 > > regards, tom lane Thanks Tom, I think with the documentation expressed this way I don't think I would have made the error I did originally; from my point of view it is a welcome improvement. Cheers, Ben -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
