Re: [Virtuoso-users] No data returned 64 bit Mac running Leopard

Wed, 14 May 2008 04:52:24 -0700 

Hi Chuck,
Development do not quite agree with the change you made as this will then return data from all graphs in the Quad store, and thus would like more details on the problem you are encountering. Can you provide samples of some of the queries you are attempting to execute. Is your Quad store accessible externally such that we could access it ? 


The Virtuoso JDBC Driver is a Type 4 "Pure"  Java application and as  
such is not dependent on the underlying OS only that their is a JVM  
for the OS which can host it. So you use the same JDBC driver for all  
OS'es


Regards
Hugh Williams
OpenLink Software


On 13 May 2008, at 21:52, Chuck Borromeo wrote:


Hi Hugh,

  I modified the VirtuosoQueryExecution.java file.  That appears to  
remove the extra stuff being prepended to my query.  Now my queries  
return data.  I modified the second constructor to now read:


public VirtuosoQueryExecution (String query, VirtGraph graph)
{
  virt_graph = graph.getGraphName();
  //modified this line:
  virt_query = "sparql " + query;
  virt_url = graph.getGraphUrl();
  virt_pass = graph.getGraphPassword();
  virt_user = graph.getGraphUser();
}


Just to be clear, is there a 64 bit version of the JDBC drivers?   
Is there something else I need to change in my code?


Thanks,
Chuck

--- On Fri, 5/9/08, Hugh Williams <hwilli...@openlinksw.com> wrote:


From: Hugh Williams <hwilli...@openlinksw.com>

Subject: Re: [Virtuoso-users] No data returned 64 bit Mac running  
Leopard

To: cborrom...@yahoo.com
Cc: virtuoso-users@lists.sourceforge.net
Date: Friday, May 9, 2008, 8:58 PM
Hi Chuck,

We are currently working on major enhancements to the
Virtuoso Jena
and Sesame RDF Providers, thus I would recommend you wait
for the
availability of the updated Jena Provider and repeat your
test.
Hopefully this provider will be available by the end of
next week. I
shall notify you when we have a cut available for you to
test.

Best Regards
Hugh Williams
Professional Services
OpenLink Software

On 9 May 2008, at 17:06, Chuck Borromeo wrote:


Hello,
  We successfully built our Virtuoso Server using the

64-bit binaries

for Leopard (Mac OS X 10.5).  We re-imported all of

the data from our

old system into the 64-bit version.  We are using JDBC

drivers to

connect our web application to the Virtuoso Server.

Here is our

environment:

Mac OS X 10.5
Jena 2.5.4
Virtuoso OpenSource 5.0.6

Previously, we were using Virtuoso OpenSource 5.0.1.

We can run

our old
queries using the 64-bit SPARQL endpoint.  Therefore,

the data is

in the
64-bit Virtuoso Server.  However, running the same

queries through our

JDBC connection does not return any data.   Here is a

snippet of

our code:

VirtGraph set = new VirtGraph

("jdbc:virtuoso://xxxxx:1112", "xxxxx",

"xxxxxxxxxx");
String queryText = "[our query]";
Query sparql = QueryFactory.create(queryText);
VirtuosoQueryExecution vqe =

VirtuosoQueryExecutionFactory.create

(sparql, set);
ResultSet results = vqe.execSelect();

Are there new versions of the JDBC drivers or Virtuoso

Jena drivers?

Are there different classes we should use?  We are

using the

virtjdbc3.jar file that was part of the 5.0.6

deployment file.  We

have
noticed the VirtuosoQueryExecution instance has an

attribute called

virt_query.  This attribute is prepending the

following text to the

beginning of our query:

sparql
 define input:default-graph-uri <virt:DEFAULT>

Could this be causing a problem?  These lines are not

part of the

original query.

Thanks,
Chuck





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