Hi all,
we managed to try this snapshot :
ftp://download.openlinksw.com/support/vos/virtuoso-
opensource-20090701.tar.gz
We have some issues with the REGEX function in SPARQL context.
Here is
a example:
-----------------------------------
import java.sql.DriverManager;
import virtuoso.jena.driver.VirtGraph;
import virtuoso.jena.driver.VirtuosoQueryExecutionFactory;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.ResultSet;
public class Main2 {
public static void main(String[] args) throws Exception {
testVirtGraph("foobar", "oo");
testVirtGraph("foobar", "ooo");
testVirtGraph("foobar", ".oo");
testJDBC("foobar", "oo");
testJDBC("foobar", "ooo");
testJDBC("foobar", ".oo");
}
public static void testVirtGraph(String value, String regex) {
try {
String query = String.format("SELECT DISTINCT * WHERE { ?s
?p ?o FILTER regex('%s', '%s') }", value, regex);
System.out.println(query);
VirtGraph graph = new VirtGraph(
"jdbc:virtuoso://localhost:1111", "dba", "dba");
QueryExecution qe =
VirtuosoQueryExecutionFactory.create(query, graph);
ResultSet rs = qe.execSelect();
System.out.println("testVirtGraph: " + rs.next());
} catch (Exception e) {
e.printStackTrace(System.out);
}
System.out.flush();
}
public static void testJDBC(String value, String regex) {
String query = String.format("select DB.DBA.RDF_REGEX('%s',
'%s')", value, regex);
System.out.println(query);
try {
java.sql.Connection conn = DriverManager.getConnection(
"jdbc:virtuoso://localhost:1111", "dba", "dba");
java.sql.ResultSet result =
conn.createStatement().executeQuery(query);
result.next();
System.out.println("testJDBC: " + result.getString(1));
} catch (Exception e) {
e.printStackTrace(System.out);
}
System.out.flush();
}
}
-----------------------------------
Here is what is printed:
-----------------------------------
SELECT DISTINCT * WHERE { ?s ?p ?o FILTER regex('foobar', 'oo') }
testVirtGraph: ( ?p =
<http://www.openlinksw.com/schemas/virtrdf#qmfShortOfLongTmpl> ) ( ?s
= <http://www.openlinksw.com/virtrdf-data-formats#sql-varchar-uri-fn>
) ( ?o = < ^{custom-verbatim-1}^_INVERSE (__id2in (^{tree}^))> ) ->
[Root]
SELECT DISTINCT * WHERE { ?s ?p ?o FILTER regex('foobar', 'ooo') }
java.util.NoSuchElementException: class
com.hp.hpl.jena.sparql.engine.ResultSetStream.next
at
com.hp.hpl.jena.sparql.engine.ResultSetStream.nextSolution
(ResultSetStream.java:88)
at com.hp.hpl.jena.sparql.engine.ResultSetStream.next
(ResultSetStream.java:98)
at fr.bnf.spar.init.Main2.testVirtGraph(Main2.java:30)
at fr.bnf.spar.init.Main2.main(Main2.java:15)
SELECT DISTINCT * WHERE { ?s ?p ?o FILTER regex('foobar', '.oo') }
java.util.NoSuchElementException: class
com.hp.hpl.jena.sparql.engine.ResultSetStream.next
at
com.hp.hpl.jena.sparql.engine.ResultSetStream.nextSolution
(ResultSetStream.java:88)
at com.hp.hpl.jena.sparql.engine.ResultSetStream.next
(ResultSetStream.java:98)
at fr.bnf.spar.init.Main2.testVirtGraph(Main2.java:30)
at fr.bnf.spar.init.Main2.main(Main2.java:16)
select DB.DBA.RDF_REGEX('foobar', 'oo')
testJDBC: 1
select DB.DBA.RDF_REGEX('foobar', 'ooo')
testJDBC: 0
select DB.DBA.RDF_REGEX('foobar', '.oo')
testJDBC: 1
-----------------------------------
Regards,
Alexandre.
