From: Jon.Roberts at asurion.com (Roberts, Jon)
Date: Thu, 3 Jun 2010 07:15:30 -0500
Subject: [Pljava-dev] cannot set the classpath to a specific jar to get
	anexternal connection
In-Reply-To: <201006031052.33192.fluca1978@infinito.it>
References: <201006031052.33192.fluca1978@infinito.it>
Message-ID: 
 <8661B041D452404E8088FBD47D2443BE019EC4FE@NDCEXCUS703.int.asurion.com>

I think you need to first install the jar and then set the class path.

For example:
select * from
sqlj.install_jar('file:///java/jars/postgresql-8.4-701.jdbc4.jar',
'example_jar', true);
select sqlj.set_classpath('public', 'example_jar');

I use PL/Java to connect to other databases (Oracle, SQL Server, and
PostgreSQL) but I created a single Jar with all of my drivers and load
that to the database.


Jon

-----Original Message-----
From: pljava-dev-bounces at pgfoundry.org
[mailto:pljava-dev-bounces at pgfoundry.org] On Behalf Of Luca Ferrari
Sent: Thursday, June 03, 2010 3:53 AM
To: pljava-dev at pgfoundry.org
Subject: [Pljava-dev] cannot set the classpath to a specific jar to get
anexternal connection

Hi all,
not sure if what I'd like to do is possible, but I'd like to use JDBC
within a 
pl/java function to extract data from another database (something
similar to 
dbilink). However if I try to change the connection to another URL
rather that 
"jdbc:default:connection" I got an error saying there is no suitable
driver, 
so I tried to add explicitly the postgresql jar to the schema, but the 
following fails:

 select sqlj.set_classpath('public', 
'/java/jars/postgresql-8.4-701.jdbc4.jar');
ERROR:  java.sql.SQLException: No such jar: 
/java/jars/postgresql-8.4-701.jdbc4.jar

So my questions are:
1) what am I missing in setting the classpath?
2) is it possible to open a connection to another database cluster?

Thanks,
Luca
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