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
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
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