On Jan 24, 2016, at 9:01 PM, Charles Clavadetscher <clavadetscher@xxxxxxxxxxxx> wrote: > What is the point of having a check constraint that is not checked? Well, it *is* checked going into the future; it's just not checked at the time the constraint is added. Ultimately, you do want to fix the data, but this makes it a two-step process, and reduces the time the table is locked against access. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general