On Fri, Oct 14, 2016 at 7:12 AM, Арсен Арутюнян <arutar@xxxxx> wrote: > Hi, everyone! > > I have a table: > > create table testpr(id serial,priority integer,unique(priority) DEFERRABLE, > primary key(id)); > This: > and a trigger which, when added to this table, automatically sets priority > as the maximum value +1 Leads to THIS: > The result (priority): > > Thread 1: (1) (2) (3) (4) (5) (6) (7) > > Thread 2: (8) (9) (10) (11) (12) (13) (14) If you have to have monotonically increasing priorities with no gaps, that's the price you pay, unless you can pre-allocate them or something. Basically max(id)+1 is a db anti-pattern. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
