On Wed, 2009-02-04 at 14:09 +0900, Craig Ringer wrote: > Guy Rouillier wrote: > > Craig Ringer wrote: > >> An internal job scheduler with the ability to fire jobs on certain > >> events as well as on a fixed schedule could be particularly handy in > >> conjunction with true stored procedures that could explicitly manage > >> transactions. > > > > Craig, what kind of "events" are you thinking about? Triggers are > > already pieces of code that run upon "certain events", namely insert, > > update or delete events. What others do you have in mind? > > That's a good point, actually. I can't think of much you can't do with a > trigger (SECURITY DEFINER if necessary) on a table. Not thinking straight. True, but the trigger does its work while the user waits. If we have a 30 min task, we don't want to just tack that on to the end of a random insert. As A.M. says elsewhere, it would be good to have a trigger that fired a NOTIFY that was picked up by a scheduled job that LISTENs every 10 minutes for certain events. We need a place for code that is *not* directly initiated by a user's actions, yet works as part of a closed loop system. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
