Hi Oda, query execution in BaseX includes various optimization steps, which might change the original quey plan. This can include the pre-evaluation of variable bindings, which will disallow repeated bindings. I'd recommend to create a new processor instance, which is fast enough in most scenarios we've encountered. Hope this helps, Christian ___________________________ Christian Grün, BaseX Uni KN, Box 188 78457 Konstanz, Germany http://www.basex.org On Thu, Jun 23, 2011 at 4:55 PM, Oda <0170003@gmail.com> wrote:

Hi,

I want to rebind the variables, but got the result that wasn't expected. How can I get the expected result without creating new processor instance? (When I use proc.query() and don't declare $var2 then got the expected result. But I have to declare $var2.)

---------- String query =        "declare variable $var1 as xs:string external; " +        "declare variable $var2 as xs:string := 'BBB'; " +        "($var1, $var2)"; QueryProcessor proc = new QueryProcessor(query, new Context());

// "AAA BBB" proc.bind("var1", "AAA"); System.out.println(proc.execute());

//duplicate definition error of $var2 //proc.query(query);

// "AAA BBB" not "CCC BBB" proc.bind("var1", "CCC"); System.out.println(proc.execute());

proc.close(); ----------

Thanks,

Oda. _______________________________________________ BaseX-Talk mailing list BaseX-Talk@mailman.uni-konstanz.de https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk