On Mon, 2007-01-08 at 02:22, Andy Dale wrote: > Hi, > > Sorry for the slight delay in my response. > > I am using 3 PostgreSQL databases and writing to them using an SQL > proxy. These databases have a high write volume. On rebooting all 3 > servers for OS/Software updates, i would like to figure out which was > the last written to DB (this is assuming the DB/Servers are not all > taken down at the same time), the times are kept in sync with NTP. > > I imagine it is possible to get this behaviour with after triggers, > but this means i have to attach the same trigger to each table ?? Hmmmm. Still not completely clear on what exactly you're doing, but I think I am getting an idea. You could set each table to have a field for a timestamp, and build a simple rule / trigger that updates it with the current time stamp for every row as it's inserted / updated. Then you could select max(timestampcolumn) from a table to see which db had the latest version. I still think there might be a better solution to your problem. Can we get a more generic overview of what you're trying to do. The 10,000 foot high view, so to speak.
