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
____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now.
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
