Re: Data in table changed?

On Tuesday 02 March 2004 19:34, Thomas Holmgren wrote:
> Hi all,
>
> I have a large number of clients synchronizing with a central database.
> The clients update their local data by polling the database for changes
> at fixed intervals. I need an efficient way of determining if data in a
> table has been changed (either updated, deleted or inserted). Can this
> be achieved without scanning the tables using expensive SQL? (my tables
> are _big_!) Is there some way to get a "time for last update" for a
> specific table? Or something similar I can use?

If you are syncing your entire database, why don't you look at replication
solutions which would transfer WAL files and perform any required updates..

Check http://gborg.postgresql.org/project/pgreplication/projdisplay.php

HTH

Shridhar