This worked for me, where “test-local” contains a document:

        Context context = new Context();

        LocalSession s = new LocalSession(context);

        s.execute(new Check("test-local"));

        try (Query q = s.query("for $doc in collection() return $doc")) {

            while (q.more()) {

                System.out.println(q.next());

            }

        }

But, why your code isn’t working could be useful to know. It seems like there are some details left out.

Kendall

From: <basex-talk-bounces@mailman.uni-konstanz.de> on behalf of AJ Weber <aweber@comcast.net>
Date: Friday, March 10, 2017 at 11:40 AM
To: "basex-talk@mailman.uni-konstanz.de" <basex-talk@mailman.uni-konstanz.de>
Subject: Re: [basex-talk] Simple query

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] De la part de Aaron Weber
Envoyé : jeudi 9 mars 2017 00:31
À : 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