Re: Queries across multiple database

Although postgres itself doesn't seem to have a thing such as Informix' "synonym" which allows more-or-less transparent access to a table in a remote database, there is a utility in contrib directory of the postgres source called dblink, which allows access to different instance of postgres by opening connections. I have only played with it for testing and have no idea of its limitations, but it might serve your needs.

Greg Williamson
DBA
GlobeXplorer LLC

-----Original Message-----
From: Garth Thompson [mailto:garth(at)opsource(dot)net]
Sent: Wednesday, June 30, 2004 3:54 PM
To: pgsql-sql(at)postgresql(dot)org
Subject: [SQL] Queries across multiple database

I am in the process of migrating the databases for an application from mysql
to postgres. The application is uses several different databases. From
what I have read, postgres still does not support queries across multiple
databases. If this is still true, does anyone have any tricks to get around
this? I'm sure this is a common problem for people migrating from mysql.
The obvious answer is to just migrate everything into one larger postgres
database, but I would like to avoid this if possible - many a line of could
would need to be touched if this was done.

Thanks,
Garth

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