No rows returned when using sql in XQuery.

Question

Hi all,
I have a small table on a db with seven cols and three rows. I am doing the following xquery, but the db is returning an empty rowset when I know there sould be 3.
<WebPage>
for $i in sqlquery("select * from project")/row
return
<project>
{$i/title}
{$i/image}
{$i/icon}
{$i/version}
{$i/start_date}
{$i/home}
{$i/address}
</project>
</WebPage>
There is no problem with the db connection, as it is one I have used before for doing plain sql searches remotely. Does any one know why this would be happening?
Regards,
Simon

Answer 1

Hi Bart,
try this.....
To execute such XQuery queries that use the sqlquery function, you would need to initialize the Java connection information in the XQueryContext before executing the query. For example, your Java program would be something like this,
// get the connection (for example, using the thick JDBC Driver)
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn =
DriverManager.getConnection("jdbc:oracle:@","scott","tiger");
// create a context using that connection..
XQueryContext ctx = new XQueryContext(conn);
// create a string from the file
Reader strm = new StringReader(
"FOR $i IN sqlquery(\"select * from scott.emp\")/ROW "+
" RETURN <EMP empno=\"{$i/EMPNO}\">$i/ENAME,$i/SALARY</EMP>");
// prepare the query
PreparedXQuery xq = ctx.prepareXQuery(strm);
// get a resultset
XQueryResultSet rset = xq.executeQuery();
while (rset.next())
XMLNode node = rset.getNode(); // get result nodes
System.out.println(" NODE "+ node.getNodeName());
node.print(System.out);
source:==>http://otn.oracle.com/sample_code/tech/xml/xmldb/jxqi.html
Good luck
Achim