Обсуждение: Postgres-R
Hello. Just interesting, anyone from this list ever try Postgres-R for cluster/replication? Sorry for OT. -- Anton P. Linevich
It's basically pre-production-ready software to date. But see the excellent presentation materials at http://conference.postgresql.org/Program (last presentation in the left-hand column). I hope to have audio for that session available soon. A On Thu, Nov 02, 2006 at 07:16:24PM +0200, Anton P. Linevich wrote: > > Hello. > > Just interesting, anyone from this list ever try Postgres-R for > cluster/replication? > > Sorry for OT. > > -- > Anton P. Linevich > > ---------------------------(end of broadcast)--------------------------- > TIP 3: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faq -- Andrew Sullivan | ajs@crankycanuck.ca This work was visionary and imaginative, and goes to show that visionary and imaginative work need not end up well. --Dennis Ritchie
Hello all, Is there an existing mechanism is postgresql that can automatically increment/decrement on a daily basis w/out user interaction? The use case I'm considering is where a student is in some type of contract with an instructor of some sort, and that contract puts a time limit on the student requiring her to pay a fee by a certain day. IF that day comes to pass - or a certain number of days elapse - and that payment requirement hasn't been met, I want to trigger a function. The one requirement I want to impose is, that no end user of the DB application, needs to do anything to set the trigger, other than the initialization of making the student of this type. An example would be: Day1 - Application user(typically the instructor) creates a profile for a new student - John Doe, which sets a 30 day time limit for John Doe to pay $100.00 Day2 -> Day31 - John Doe didn't make the payment Day 31 - Trigger of event occurs when the instructor logs in. Basically on Day 1 when John Doe's profile was created, I want a decrement counter to occur daily on his profile(some attribute/timer) and nothing should happen until day 31 when he doesn't pay. Any ideas? -- Email: louis.gonzales@linuxlouis.net WebSite: http://www.linuxlouis.net "Open the pod bay doors HAL!" -2001: A Space Odyssey "Good morning starshine, the Earth says hello." -Willy Wonka
Moving to -general (and please start a new thread instead of hijacking an existing one). On Thu, Nov 02, 2006 at 01:14:22PM -0500, louis gonzales wrote: > Hello all, > Is there an existing mechanism is postgresql that can automatically > increment/decrement on a daily basis w/out user interaction? The use > case I'm considering is where a student is in some type of contract with > an instructor of some sort, and that contract puts a time limit on the > student requiring her to pay a fee by a certain day. IF that day comes > to pass - or a certain number of days elapse - and that payment > requirement hasn't been met, I want to trigger a function. > > The one requirement I want to impose is, that no end user of the DB > application, needs to do anything to set the trigger, other than the > initialization of making the student of this type. > > An example would be: > Day1 - Application user(typically the instructor) creates a profile for > a new student - John Doe, which sets a 30 day time limit for John Doe to > pay $100.00 > Day2 -> Day31 - John Doe didn't make the payment > Day 31 - Trigger of event occurs when the instructor logs in. > > Basically on Day 1 when John Doe's profile was created, I want a > decrement counter to occur daily on his profile(some attribute/timer) > and nothing should happen until day 31 when he doesn't pay. While you could setup a cron job to decrement some counter every day, I think that's not the best approach. Instead, I'd run a query once a day that finds all students that are past-due and takes some kind of action. -- Jim Nasby jim@nasby.net EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)