BaseX-Talk

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9 participants
5241 discussions

Having trouble inserting elements using XQJ
by stefano＠santoro.org 26 May '10

26 May '10

Hi, I am attempting to execute an XQJ prepared expression that uses an external bind variable that accepts an xml element, and inserts it into the database document: declare variable $inserto as element(*,xs:untyped) external; let $root := basex:db('Annotations')/Annotations return (insert node $inserto into $root) I prepare the above statement and I bind DOM element as follows (groovy syntax): eltype = conn.createElementType(null, XQItemType.XQBASETYPE_ANYTYPE); ixpr.bindNode(new QName("inserto"), irel, eltype); irel is dom element that serializes as follows: <inserto id="6"> <testo>six</testo> </inserto> unfortunately I get an NPE when I try to execute the Query: groovy:000> rs = ixpr.executeQuery() ERROR java.lang.NullPointerException: null at org.basex.query.item.FElem.copy (FElem.java:214) at org.basex.query.item.FElem.copy (FElem.java:1) at org.basex.query.item.FElem.copy (FElem.java:210) at org.basex.query.item.FElem.copy (FElem.java:1) at org.basex.query.expr.Constr.add (Constr.java:107) at org.basex.query.expr.Constr.<init> (Constr.java:53) at org.basex.query.up.Insert.atomic (Insert.java:60) at org.basex.query.up.Insert.atomic (Insert.java:1) at org.basex.query.expr.Expr.iter (Expr.java:53) at org.basex.query.QueryContext.iter (QueryContext.java:322) at org.basex.query.QueryContext.iter (QueryContext.java:290) at org.basex.api.xqj.BXQDynamicContext.execute (BXQDynamicContext.java:247) at org.basex.api.xqj.BXQPreparedExpression.executeQuery (BXQPreparedExpression.java:54) at groovysh_evaluate.run (groovysh_evaluate:10) ... I am using BaseX 6.1 Am I doing anything wrong? Stefano

3 4

gui version possible bug with handling xml attributes?
by Sandra Maria Silcot 26 May '10

26 May '10

Hello all, I am experiencing this odd behaviour in the gui version of basex v6.1 on windows xp. When using the Explorer panel and I choose an attribute (prefixed with "@"), the query info panel reports: Error: [XPST0003] Unexpected end of query: '@seriesId[text(...'. It presents the attribute values correctly in the drop down display, but if I select a value or try to filter, nothing happens and the error message is repeated. It looks like it thinks its processing an element. Shouldn't attribute queries be written as "data(@attrName)"? I am not sure when this crept in. Is anyone else experiencing this behavior? I am getting this on any xml document having attributes in the gui version. Thanks for any insight. Cheers all, Sandra

3 4

Congruence of documents and database nodes
by Hans-Peter Oeri 25 May '10

25 May '10

Hi! Within the documentation[1], you note that XQuery Updates are not reflected in the documents. There is an example of how to write queries that use fn:put to do such an update manually. Under the assumption that XQueries and updates are far more frequent than document puts/pulls, wouldn't an 'inversed' technique be favorable? One that updates "dirty" documents upon fetching them rather than updating with each and every query? (Plus, as far as I see, not needing manual fn:puts is more interoperable) Unfortunately, such 'inversion' would not only need an update to the API classes, but also the "core" (as "dirty" documents would need to be flagged). Would that be a reason the current implementation got as it is? Or don't I see some other issue? HPO [1] http://www.inf.uni-konstanz.de/dbis/basex/xquery#update

2 1

Re: [basex-talk] Problem With Large Files
by Christian Grün 25 May '10

25 May '10

Hi Ramesh, I've run your code example, using my own 123.xml document, and it works fine in my environment (the XMLDBCollection database instance is eventually removed). Please provide us with even more details if you want us to reproduce the issue. Christian On Tue, May 25, 2010 at 1:26 PM, Ramesh G <ramesh.gubbala9(a)gmail.com> wrote: > Hi Christian, > Thanks for your help. > When using xmldb API, OutOfMemoryError occurred. After setting up Xmx > option, this problem was rectified. > But how can I delete those files created in BasexData directory when > using XQJ API. > Thanks & Regards, > Ramesh .G > > > > > On Tue, May 25, 2010 at 4:03 PM, Christian Grün <christian.gruen(a)gmail.com> > wrote: >> >> Ramesh, >> >> > When I try to Query an XML file using XQJ ,every thing goes fine >> > but >> > a set of ".basex" files in BasexData directory. >> > The thing is that I want to delete these files after query >> > processing is done.Please help in doing this. >> >> Hm, so when does the OutOfMemory problem occur? Have you been >> successful using the Xmx flag? >> Christian > >

1 0

problem with dropDB
by Sateesh 25 May '10

25 May '10

HI All, I have a problem with dropDB which is not deleting my database.following is the code that iam using. package sampletest; import org.basex.core.Context; import javax.xml.xquery.XQConnection; import javax.xml.xquery.XQDataSource; import javax.xml.xquery.XQExpression; import org.basex.core.proc.CreateDB; import org.basex.core.proc.DropDB; public final class XQJQuery { /** Database driver. */ private static final String DRIVER = "org.basex.api.xqj.BXQDataSource"; static final Context CONTEXT = new Context(); /** Sample query. */ private static final String QUERY = "for $x in doc('largexmls')//ROW return distinct-values($x/Number) "; /** Private constructor. */ private XQJQuery() {} public static void main(final String[] args) { try { new CreateDB("D:/Aircel/xQuery/XML/largexml.xml", "largexmls").execute(CONTEXT); //new Open("largexml").execute(CONTEXT); XQDataSource xqd = ((XQDataSource) Class.forName(DRIVER).newInstance()); // Build a connection to the specified driver. final XQConnection conn = xqd.getConnection(); // Prepare the expression with the document and the query. final XQExpression expr = conn.createExpression(); // Execute the query. expr.executeQuery(QUERY); expr.close(); conn.close(); // Close the expression. System.out.println("value is :"+new DropDB("largexmls").execute(CONTEXT)); } catch(Exception excp) { excp.printStackTrace(); } } } Please help me on how can i delete the DB. Thanks & Regards Sateesh.A

2 1

BaseX 6.1 Update - Soft-Files.com
by Soft-Files Team 23 May '10

23 May '10

Dear Developer, Your product BaseX 6.1 has been updated. Your product review page is located at: http://www.soft-files.com/basex_72311.html. Sincerely, The Soft-Files Team

1 0

Two Questions about BaseX
by denir.li＠gmail.com 20 May '10

20 May '10

Hello, I am Denir. Wikipedia.org recently by the Native XML Database description that BaseX, so download and test, I think this is the most convenient for the Native XML Database software! However, there are two questions to ask: 1. In Development Page inside the Examples, "XQJ API Example -> XQJQuery" not like "XML: DB API Examples -> XMLDBQuery" can access to the remote server native XML database, can only access the XML file in Project, is XQJQuery unable to reach it? Is there any way to do so? 2. My operating system is Ubuntu 8.04 LTS, when I use "java-Xmx1024m-jar BaseX.jar" to start the GUI when not display properly, the picture will become this http://picasaweb.google.com/lh/photo/1v51MX1lr01TassYOA6_Ow?feat=directlink , so I do not know what can fix it. Thank you very much for your help!

1 0

Two Questions about BaseX
by denir.li＠gmail.com 20 May '10

20 May '10

1 0

connect To BaseX via java
by ajrattan05＠gmail.com 18 May '10

18 May '10

I need to connect to BaseX via a java program . Could some one guide me to the java (client and Example ) code. The site contains bindings for C# , php etc . I am a newbie but have worked on Tcp/Ip Using java. Any help would be appreciated .

2 1

about Xupdate
by Sayali Kulkarni 16 May '10

16 May '10

I want to upadate my xml database. So pls send me query for Xupdate

2 1

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