On Thu, 9 Feb 2012, Merlin Moncure wrote:
If you can't (which happens on various type of data), then the surrogate is giving the illusion of row uniqueness when there isn't one.
Ah, but each row is unique. However, there is no consisten set of non NULL values that can consistently define a unique key for each row. Rich -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
