Re: Any Plans for cross database queries on the same server? - Mailing list pgsql-general

I actually disagree, mildly.

Our system uses two variants of two types of data.

Client data has a presence in the billing database, but has an incarnation in our runtime servers to allow for
authentication.Not the same databases, since we can't afford the extra time for the hop, which might be scores of miles
awayand not necessarily available. Not exactly the same data, and not all of the billing stuff goes to runtime. 

Spatial data has a representation in our backroom servers which support processing incoming imagery. Runtime has a
similarrepresentation (with some serious handwaving for speed) of the spatial data. And there's some links between
contentmanagement and billing to allow for royalties. Again, similar but not identical data/purposes. 

Informix has a capability (a "synonym") to make a table in another instance appear as a local table; certain operations
aren'tpossible [remote index structures aren't visible IIRC and a few data manipulations]. I could use a synonym to do
joinsand updates on the remote tables in native SQL; with postgres I need to do a lot more handwaving -- actually
pullinglogic out of the databases and putting it into applications. (Yes, db-link would work but it seemed  

Sorry for top-posting but this interface doesn't do graceful quoting, etc.

Greg Williamson
DBA
GlobeXplorer LLC, a DigitalGlobe company

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-----Original Message-----
From:    pgsql-general-owner@postgresql.org on behalf of Joshua D. Drake
Sent:    Tue 1/30/2007 6:15 PM
To:    Peter Eisentraut
Cc:    pgsql-general@postgresql.org; Tony Caduto
Subject:    Re: [GENERAL] Any Plans for cross database queries on the same server?

Peter Eisentraut wrote:
> This has been discussed about ten thousand times, and the answer is
> still no.
>
>
Actually the answer is: Check the TODO list. It is listed under Exotic
features, so the answer is, no we can't yes we would like to.

That being said, I think it is a dumb feature. If you have data in one
database, that requires access to another database within the same
cluster. You designed your database incorrectly and should be using schemas.

If you have data in one database that requires access to another
database that is not in the same cluster (which happens alot) use dbi-link.

Joshua D. Drake




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