Re: [basex-talk] Simple query

10 Mar 2017


      On 3/10/2017 2:24 PM, Kendall Shaw wrote:
...
Michael Seiferle gave the answer already, I think. What would 
collection() be referring to? How would BaseX know what to return? 
Probably there is no database specified. Presumably, in the GUI you 
have opened a database.
Yes, I did not include my code to open the database.  There is a 
database open and this does not throw an exception, it just returns no 
results.

In my constructor of this class there is the following code:
new Check(this.MyID).execute(context);

(MyID is a String identifying the database I want to work with 
exclusively with this context passed.)

As I mentioned in a separate post, my query where matches(uri...) works 
fine...every time.  That query also does not have a specific collection 
in the query.
...
Kendall
*From: *<basex-talk-bounces@mailman.uni-konstanz.de> on behalf of AJ 
Weber <aweber@comcast.net>
*Date: *Friday, March 10, 2017 at 6:44 AM
*To: *Fabrice ETANCHAUD <fetanchaud@groupefbo.com>, 
"basex-talk@mailman.uni-konstanz.de" <basex-talk@mailman.uni-konstanz.de>
*Subject: *Re: [basex-talk] Simple query
On 3/9/2017 3:46 AM, Fabrice ETANCHAUD wrote:
Hello Aaron,
You would learn faster by using the BaseXGUI application,
You will benefit from syntax highlighting, real time execution,
    and hits on function signatures.
I am trying the GUI now.  It is an excellent tool!
However, issuing the same exact XQuery in the GUI returns 3 documents 
(which is what I would have originally expected).
Maybe it is an issue with how I setup my query in java?  Here is my code:
try (LocalSession session = new LocalSession(this.context)) {
            //test
try (Query q = session.query("for $doc in collection() 
return $doc")) {
                while (q.more()) {
                    LOG.debug("RESULT: " + q.next());
                }
            }
        }
        catch (Exception e) {
            LOG.error("Could not execute query " + statement, e);
        }
Best regards,
Fabrice
*De :*basex-talk-bounces@mailman.uni-konstanz.de
    <mailto:basex-talk-bounces@mailman.uni-konstanz.de>
    [mailto:basex-talk-bounces@mailman.uni-konstanz.de] *De la part
    de* Aaron Weber
    *Envoyé :* jeudi 9 mars 2017 00:31
    *À :* basex-talk@mailman.uni-konstanz.de
    <mailto:basex-talk@mailman.uni-konstanz.de>
    *Objet :* [basex-talk] Simple query
Newbie alert.
I'm trying to get my feet wet with BaseX, and in doing so, am
    trying to understand XQuery and how to apply it to a database full
    of documents (not just a single document that is typically queried).
I am using Java and can post my code, but with a LocalSession, and
    a query, the following produces 0 results.
For $doc in collection() return $doc
I realize there's no "where", and in the sql world that would
    match all. Maybe not in XQuery?
Obviously just a test query, but I need to start somewhere. :-)
Thanks for any help!
    -- 
    AJ

Re: [basex-talk] Simple query

AJ Weber