On Wed, Jul 24, 2013 at 11:44 PM, Andrew Bartley <ambart...@gmail.com> wrote: > Hope this question is not too stupid but...... > > I am trying to do something like this > > create table cats (a text,b text); > > create rule cats_test as on update to cats do set a = new.b; > > Can i manipulate column "a" sort of like this... or is there a better way. > > I would like to do this as the construction of the new.b value is complex > and time consuming, so I just want to do it once. > > update cats > set b = something_complex_and_time_consuming(b);
AFAIK, the best way here is to use trigger that does new.a = new.b. -- Kind regards, Sergey Konoplev PostgreSQL Consultant and DBA Profile: http://www.linkedin.com/in/grayhemp Phone: USA +1 (415) 867-9984, Russia +7 (901) 903-0499, +7 (988) 888-1979 Skype: gray-hemp Jabber: gray...@gmail.com -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
