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* Queries across multiple database
@ 2004-06-30 22:54 Garth Thompson <garth@opsource.net>
2004-06-30 23:19 ` Re: Queries across multiple database Rod Taylor <pg@rbt.ca>
0 siblings, 1 reply; 3+ messages in thread
From: Garth Thompson @ 2004-06-30 22:54 UTC (permalink / raw)
To: pgsql-sql
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
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Queries across multiple database
2004-06-30 22:54 Queries across multiple database Garth Thompson <garth@opsource.net>
@ 2004-06-30 23:19 ` Rod Taylor <pg@rbt.ca>
0 siblings, 0 replies; 3+ messages in thread
From: Rod Taylor @ 2004-06-30 23:19 UTC (permalink / raw)
To: Garth Thompson <garth@opsource.net>; +Cc: pgsql-sql
On Wed, 2004-06-30 at 18:54, Garth Thompson wrote:
> 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.
In this case, a PostgreSQL Schema is essentially the same as a MySQL
Database.
Use one database, and multiple schemas.
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Queries across multiple database
@ 2004-06-30 23:14 Gregory S. Williamson <gsw@globexplorer.com>
0 siblings, 0 replies; 3+ messages in thread
From: Gregory S. Williamson @ 2004-06-30 23:14 UTC (permalink / raw)
To: Garth Thompson <garth@opsource.net>; pgsql-sql
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@opsource.net]
Sent: Wednesday, June 30, 2004 3:54 PM
To: pgsql-sql@postgresql.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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2004-06-30 22:54 Queries across multiple database Garth Thompson <garth@opsource.net>
2004-06-30 23:19 ` Rod Taylor <pg@rbt.ca>
2004-06-30 23:14 Re: Queries across multiple database Gregory S. Williamson <gsw@globexplorer.com>
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