On Fri, Mar 16, 2007 at 10:18:56AM -0700, Reece Hart wrote: > On Thu, 2007-03-15 at 16:20 -0400, Robert Treat wrote: > > Do you find [HSODBC] works well? I've used it from some older > > Oracle instances connecting back into PostgreSQL and the results I > > had have been flakey at best. > > - The real nail in the coffin seemed to be that there was no way to > push predicates to the remote side. This mean that a remote relation > was materialized locally in order to join with local data and that > we'd never get reasonable performance for cross-database joins > (which, perhaps, it's not designed to do). DBI-Link has a way to push predicates to the remote side, but you have to do it manually because DBI-Link is a user-space application, i.e. it doesn't have access to PostgreSQL's planner. Let me know if you have questions on how this works :) Cheers, D -- David Fetter <david@xxxxxxxxxx> http://fetter.org/ phone: +1 415 235 3778 AIM: dfetter666 Skype: davidfetter Remember to vote! Consider donating to PostgreSQL: http://www.postgresql.org/about/donate
