From: | "Bart Degryse" <Bart(dot)Degryse(at)indicator(dot)be> |
---|---|
To: | <pgsql-jdbc(at)postgresql(dot)org>, <pgsql-novice(at)postgresql(dot)org> |
Subject: | Re: [NOVICE] Query with tables from 2 different databases inJava |
Date: | 2007-06-07 14:57:49 |
Message-ID: | 4668390D.A3DD.0030.0@indicator.be |
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Thread: | |
Lists: | pgsql-jdbc pgsql-novice |
Personally I have no good experiences with neither dblink nor dbi-link.
They perferm only acceptably on very few records.
My approach now is to use srf plperl functions. That approach requires you
to have a reasonable knowledge of perl, but is in my experience the fastest
(or at least slow) one and certainly the most flexible one.
>>> Sean Davis <sdavis2(at)mail(dot)nih(dot)gov> 2007-06-07 16:25 >>>
Loredana Curugiu wrote:
> Hi,
>
> I need a query to use tables from 2 different databases and
> that query to be executed from a .java file. What do you recommand?
Hi, Loredana. You can't execute a query that includes two different
databases in postgresql. However, you may want to look at the dblink
contributed module (in contrib/dblink in the postgresql source) that
provides an extension to do this. I have no idea how this will behave
in the context of a java client, though.
Sean
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
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