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

[Chuck B. <cbo...@ya...>]

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 <hwi...@op...> wrote:

> From: Hugh Williams <hwi...@op...>
> Subject: Re: [Virtuoso-users] No data returned 64 bit Mac running Leopard
> To: cbo...@ya...
> Cc: vir...@li...
> 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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