- BaseX-Talk - mailman.uni-konstanz.de

tablemem
by NewIntellectual 18 Jun '10

18 Jun '10

I've tried to figure out how to use the described 'tablemem' command ("Loading database table into main memory and speedup evaluation times"), unsuccessfully so far. Can this be invoked both in the BaseX GUI and in a client call to the server? Surely it would only make sense to make the call once after server startup.

2 1

default basex data directory
by szabolcs kurdi 18 Jun '10

18 Jun '10

Hi! I know that one can move the BaseXData directory from his or her home, but wouldn't this directory be better placed into something like "Application Data" (Windows), or ".BaseXData" on linux and friends by default? Is there a reason that the data directory is so "visible"? Maybe I have missed something here and that's how it should be - thanks! Szabolcs Kurdi

2 1

Leave whitespaces in XML when loading XML file with new CreateDB
by Jiří Kadlec 17 Jun '10

17 Jun '10

Hi Guys, How can I preserve whitespaces in XML document, when i'm using new CreateDB(..) object for creating new database from Java code. When I export data with new Export(..) I get document with choped whitespaces. I found out, that there is a possibility to preserve whitespaces when I create DB from BaseX gui. There is a possibility to uncheck option chop whitespaces which gives me required result. Is there any way how to do this from Java. Thank you Jiri

4 9

heterogeneous collections, filter notation, and/or add command
by C. M. Sperberg-McQueen 15 Jun '10

15 Jun '10

I'm trying to build a BaseX database containing the current contents of the XSD 1.1 test suite, and have run across a problem I suspect is easily soluble, but for which I am not finding the solution. The directory tree containing the database includes a large number of test cases, mostly files with names ending in .xml, and a smaller number of schema documents for the test cases, which mostly have names ending in .xsd. (One set of test contributions has three or four .xml files which are not in fact XML but which are testing the behavior of the processor in the presence of ill-formed input. I've renamed these so their names end in .xmlnwf, because they were causing attempts to index all the XML documents to fail.) There are also XML files with metadata for the test cases, some of which have names ending in .xml and some with names ending in .testSet. And there is some random stuff that I'm not particularly interested in indexing: some README files, a Microsoft Word document included by one organization contributing test cases, and (since I'm working under Mac OS X) some .DS_Store files containg OS-level binary metadata about the directory. There may be other files in the directories as well; I haven't tried to make a full census. If I could, I'd tell the database creation dialog to index everything it can parse as XML and ignore the rest. But when the parser encounters ill-formed input, it issues an error message and aborts the creation of the database. (And then the message disappears, so the user doesn't know which file caused the problem. If you could change that, it would be great, but really that's a separate issue.) Alternatively, I'd like to tell the creation dialog to use a filter that accepts either .xml files or .xsd files or .testSet files. But I can't figure out what notation to use for that. Since the example given ("*.xml") looks like a bash wildcard, I've tried "*.xml, *.xsd, *.testSet", and "*.xml,*.xsd,*.testSet" and "*.xml *.xsd *.testSet" and "*.{xml,xsd,testSet}", none of which match any files. Is there a way to specify a filter that matches several file extensions? Guided by http://www.inf.uni-konstanz.de/dbis/basex/commands I then tried add /home/xmlschema/xsts11/*/*.xsd in the command area in the GUI, but it tells me the command ADD is not known. (Perhaps this is because I'm still using 5.7; perhaps ADD came later?) I'm hoping wildcards are allowed in ADD commands, because the task of finding and adding fourteen thousand .xsd files would be a bit tedious. (I suppose I could use the command-line interface to do it.) It would also be nice to have the ADD functionality better integrated into the GUI. (How spoilt I have become! I can't believe I'm not using the command line, but the syntax checking in the query window is too helpful for me.) Any advice on (1) the notation of the filter parameter, (2) the use of wildcards in the ADD command, or (3) any other way to solve this task and build this database? I'm using the GUI interface to BaseX (odd; my name for the app makes clear I think it is version 5.7, but the About dialog box gives the number 12.2). I'll send this note, and then download and install 6.1 to see if it helps. -- **************************************************************** * C. M. Sperberg-McQueen, Black Mesa Technologies LLC * http://www.blackmesatech.com * http://cmsmcq.com/mib * http://balisage.net ****************************************************************

3 2

Oops
by NewIntellectual 15 Jun '10

15 Jun '10

A couple of corrections to my previous post. First, I realized after posting that my statement "including retrieval and processing of title information for the documents" isn't quite true. I forgot that I now lazy-load that particular metadata for each book, on demand (which is also fast.) However, it is definitely true that BaseX is very rapidly finding all of those hits, with retrieval of book-level metadata for each hit. Also, apologies to Christian Grün for misspelling his last name as Guen in my last post.

1 0

Experience with BaseX (reply)
by NewIntellectual 14 Jun '10

14 Jun '10

Erik - My own experience with BaseX 6.0+ has been extremely positive. I needed a fast, multi-user (reading) database that implemented not just XQuery, but XQuery with standard Full Text extensions. And not for a toy database, but for a database of historical documents, initially with about 200,000 pages of text with significant internal structure. I initially stress-tested BaseX for multiple users/queries and found a problem, which Christian Guen took seriously and rapidly fixed. (When I say stress-tested, I mean I really hammered it.) The same has been true for a few other glitches and questions. Overall, BaseX has been very solid and very fast. It is crazy-fast for the complete indexing that it does, and it is really fast for queries. Fast enough to find tens of thousands of hits in a structured XQuery+full text search of about 200,000 book pages in under 2 seconds, including retrieval and processing of title information for the documents. So I really like BaseX for its practical utility, and as a programmer I also appreciate that the overall approach to the system is clean and pretty rigorous. They set out to implement actual W3C standards for XQuery and XQuery with Full Text extensions, and that's what you get, plus some useful extensions. The included simple GUI is actually very useful, not just a toy. I place BaseX in distinct contrast to the older and apparently more established eXist system. My experience testing with it, over time as the system has evolved, has not been positive. It is cumbersome to set up - especially for indexing - and it does not follow W3C standards for XQuery Full Text but instead uses its own syntax, and if you look at the mailing list for it, it seems to have a large number of ongoing bugs. It really feels like a big, unstable hack. From a performance perspective, a much smaller subset of my full database began to seriously slow down queries. As far the future goes, my biggest hope is that BaseX becomes better at being a true writable database system. While it appears to handle standard XQuery Update without problems (which itself is impressive!), this is restricted to one writer at a time, as I understand it. I would not try to use BaseX currently as a general purpose writable database, but I also don't need it. In my view, there is a place for XML databases alongside use of standard relational systems. In that regard, I highly recommend the H2 database system if you need a clean, powerful, fast Java relational DBMS - it is greatly superior to, e.g. Derby. So it probably goes without saying, but I am a big fan of BaseX and I hope to see it grow in popularity and features, as it deserves. Phil Oliver Oliver Computing LLC

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XQuery Update syntax
by NewIntellectual 14 Jun '10

14 Jun '10

As an FYI for those starting with XQuery Update, I've found this to be a short but very practical and useful guide: http://www.xmlmind.com/_tutorials/XQueryUpdate/index.html I've successfully used BaseX to apply large numbers of updates to a database containing roughly 200,000 pages-equivalent of text.

2 1

exists(<xpath>) returns empty, database corruption
by Swaminathan S 14 Jun '10

14 Jun '10

Hi, I am using BaseX version 6.03 using client server mode. I face 2 kinds of problems: 1) sometimes, BaseX returns nothing for exists(<xpath>) function (only true or false is expected) - in these cases, I execute some XQueries(XQuery-updates and XQueries) using XQuery API.This starts happening consistently for a few xpaths but not for all xpaths. Just to give you the scenario, my xupdates are always done such that I export the database after every database change. Also, I operate on only on one database(one xml file). 2) also sometimes, the database gets corrupted (some elements get moved beyond the end of the root element). I want to know if you have ever encountered this problem, the cause and if they have been fixed in newer versions. Thanks, Swaminathan Sahiram

4 4

Search term highlighting?
by NewIntellectual 09 Jun '10

09 Jun '10

Is there a ready way to perform search term highlighting in a fulltext query result? I found a reference to a 'ft:highlight' function at http://www.xmlmind.com/qizx/_distrib/docs/manual/fulltext_extensions.htmlbut this does not apparently exist in BaseX or as a standard function.

2 1

Yahoo! Auto Response
by tameraso3per＠yahoo.com 08 Jun '10

08 Jun '10

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1 0

Confirming that your fix works well, and a question
by Stefano Santoro 06 Jun '10

06 Jun '10

Dear Lukas

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Binding for BaseX in Rebol
by sf＠sabufrancis.com 04 Jun '10

04 Jun '10

Hi Thank you for your wonderful Native XML database system. I have been working with it for a few months now, and am quite happy to submit a Rebol binding for BaseX. This was based by my understanding of the Java Binding given by you. Please take a look here http://code.google.com/p/reb-basex Let me have your feedback! Thanks Regards Sabu Francis

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Fwd: Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 02 Jun '10

02 Jun '10

Hi Lukas, just to be thorough I tried all the steps I have described in my earlier e-mail on a different workstations running a different OS (linux), and the attempt yielded the same Exception. Ciao Stefano On Fri, May 28, 2010 at 1:14 PM, Stefano Santoro <stefano(a)santoro.org> wrote: > Hi Lukas, > > Interesting. I have gotten all your maven repository jar files and > included them in the class path as follows: > > $ echo $GVYCP > C:\opt\jlib\basex-api\xmldb-api-1.0.jar;C:\opt\jlib\basex-api\xqj-api-1.0.jar;C:\opt\jlib\basex-api\basex-api-6.1.3.jar;C:\opt\jlib\basex-api\basex-6.1.3.jar > > the same but more clearly listed > > $ dvcp GVYCP > 0) C:\opt\jlib\basex-api\xmldb-api-1.0.jar > 1) C:\opt\jlib\basex-api\xqj-api-1.0.jar > 2) C:\opt\jlib\basex-api\basex-api-6.1.3.jar > 3) C:\opt\jlib\basex-api\basex-6.1.3.jar > > I have run the same java class I have enclosed in the earlier version > as follows: > > $ java -version > java version "1.6.0_17" > Java(TM) SE Runtime Environment (build 1.6.0_17-b04) > Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) > > $ java -cp ".;${GVYCP}" NPEReproducer > java.lang.ArrayIndexOutOfBoundsException: 5 > at org.basex.query.up.Primitives.add(Primitives.java:52) > at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) > at org.basex.query.up.Updates.add(Updates.java:90) > at org.basex.query.up.Insert.atomic(Insert.java:102) > at org.basex.query.up.Insert.atomic(Insert.java:30) > at org.basex.query.expr.Expr.iter(Expr.java:58) > 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:246) > at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) > at NPEReproducer.reproduceNPE(NPEReproducer.java:51) > at NPEReproducer.main(NPEReproducer.java:60) > > I have also checked out your basex trunk and was able to build > basex-6.1.3.jar, and even with that jar the same exception was thrown. > > I was not able to build the api maven project as it could not resolve > the jax-rx dependency.(see attached log) > > I was able though to build an api jar from your trunk that contained > only the xml:db and XQJ drivers from trunk, and with that too the same > exception was thrown. > > So I have tried with the jars that I have downloaded from: > > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/xmldb/xmldb-api/1.0/xml… > http://www.inf.uni-konstanz.de/dbis/basex/maven/javax/xml/xquery/xqj-api/1.… > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex-api/6.1.3/b… > http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex/6.1.3/basex… > > I have also built basex-6.1.3.jar and basex-6.1.3.jar (w/o jaxrx) from > your trunk, and yet I was not able to run it as you were able to do. > > Is there anything I am missing? > > Ciao > Stefano > > > > On Fri, May 28, 2010 at 9:15 AM, Lukas Kircher > <lukaskircher1(a)googlemail.com> wrote: >> Hey Stefano, >> >> thanks for your report. >> >>> I am enclosing a java class file that reproduces this problem against >>> 6.1.3 basex jar files >> >> >> Unfortunately I wasn't able to reproduce the exception by running your >> code - neither with version 6.1.3 nor with our current repository version. >> It runs fine on my machine. Do you have a clue where I could've missed >> something? >> >> Or - if you have another case at hand where you encounter the same problem, >> just let us know and we'll see what we can do. >> >> Kind regards, >> Lukas >> >

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Fwd: Re: dropping DataBase
by Leonard Wörteler 30 May '10

30 May '10

Hi Bea, i didn't realize that you're not on the basex-talk list. Sorry for that. Leo -------- Original-Nachricht -------- Betreff: Re: [basex-talk] dropping DataBase Datum: Sun, 30 May 2010 18:34:42 +0200 Von: Leonard Wörteler <leo(a)woerteler.de> An: basex-talk(a)mailman.uni-konstanz.de Hi again, Just in case you're interested: A simple way to create a main-memory based DB in BaseX, given the path to an XML document, would be final Data db = CreateDB.xml(IO.get(path), CTX.prop); CTX.openDB(db); // open DB in current Context By the way, this also works if you feed IO.get(..) an XML string instead of a path. Cheers again, Leo Am 30.05.2010 17:10, schrieb Leonard Wörteler: > Hello Beatriz, > > Am 30.05.2010 16:32, schrieb Beatriz Sancho: >> static public Vector queryExtraeDatosCabecera(final String query) throws >> BaseXException, QueryException, IOException { >> WorkSpace sp1 = new WorkSpace(); >> String workspace = sp1.getWorkspace(); >> new CreateDB(workspace + "\\cabecera.xml", "DBCabecera").execute(CONTEXT); >> [...] >> new DropDB("DBCabecera").execute(CONTEXT); >> return datos; >> } > > wouldn't it be much easier to use an in-memory DB in this case? No need > to explicitly drop it and you probably would even get better performance > because of reduced I/O. > > Just my 0.02$...

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dropping DataBase
by bea.sancho＠gmail.com 30 May '10

30 May '10

Do you have any idea about this? org.basex.core.BaseXException: Database could not be dropped. at org.basex.core.Proc.execute(Proc.java:75) when it does: new DropDB("DBCabecera").execute(CONTEXT); My program is doing a lot of actions to get some information and sometimes this error appears, do you know why? How can i solve it? Another question, what would happen if I create a lot of news DB with the same name and i don't drop them? Thank you very much!

5 4

nasty bug with xquery empty sequence ()
by Sandra Maria Silcot 30 May '10

30 May '10

To basex developers, The following xquery returns 464 <persName> elements with saxonHE but fails to produce any <persName> elements when the query is run in basex (6.1.3). for $RT in ("c31a") let $theseRecs := //c31a[sourceVol="CON 31/2"] let $ctr := count($theseRecs) let $pList := <listPersName n="{$ctr}">{ for $p at $i in $theseRecs let $conref := if ( $RT = "c37v" ) then <hi/> else () return <persName id="{$p/@xml:id}">{$i}</persName> }</listPersName> return ( $pList,<hello/> ) If the xquery null sequence () in line 6 is changed to an empty string: else "" I get the expected 464 results. With () in the else I get only this: <listPersName n="464"/> <hello/> I had a devil of a time detecting this. I also have encountered bad behaviour when running queries against attributes which exist but have no value, like this: <el attr=""> In Saxon I can search for //el[@attr=""] and get results but basex does not find these cases. Hoping these bugs can be quickly squashed. regards, Sandra

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Re: [basex-talk] Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 29 May '10

29 May '10

Hi Lukas, Interesting. I have gotten all your maven repository jar files and included them in the class path as follows: $ echo $GVYCP C:\opt\jlib\basex-api\xmldb-api-1.0.jar;C:\opt\jlib\basex-api\xqj-api-1.0.jar;C:\opt\jlib\basex-api\basex-api-6.1.3.jar;C:\opt\jlib\basex-api\basex-6.1.3.jar the same but more clearly listed $ dvcp GVYCP 0) C:\opt\jlib\basex-api\xmldb-api-1.0.jar 1) C:\opt\jlib\basex-api\xqj-api-1.0.jar 2) C:\opt\jlib\basex-api\basex-api-6.1.3.jar 3) C:\opt\jlib\basex-api\basex-6.1.3.jar I have run the same java class I have enclosed in the earlier version as follows: $ java -version java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) Client VM (build 14.3-b01, mixed mode, sharing) $ java -cp ".;${GVYCP}" NPEReproducer java.lang.ArrayIndexOutOfBoundsException: 5 at org.basex.query.up.Primitives.add(Primitives.java:52) at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) at org.basex.query.up.Updates.add(Updates.java:90) at org.basex.query.up.Insert.atomic(Insert.java:102) at org.basex.query.up.Insert.atomic(Insert.java:30) at org.basex.query.expr.Expr.iter(Expr.java:58) 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:246) at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) at NPEReproducer.reproduceNPE(NPEReproducer.java:51) at NPEReproducer.main(NPEReproducer.java:60) I have also checked out your basex trunk and was able to build basex-6.1.3.jar, and even with that jar the same exception was thrown. I was not able to build the api maven project as it could not resolve the jax-rx dependency.(see attached log) I was able though to build an api jar from your trunk that contained only the xml:db and XQJ drivers from trunk, and with that too the same exception was thrown. So I have tried with the jars that I have downloaded from: http://www.inf.uni-konstanz.de/dbis/basex/maven/org/xmldb/xmldb-api/1.0/xml… http://www.inf.uni-konstanz.de/dbis/basex/maven/javax/xml/xquery/xqj-api/1.… http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex-api/6.1.3/b… http://www.inf.uni-konstanz.de/dbis/basex/maven/org/basex/basex/6.1.3/basex… I have also built basex-6.1.3.jar and basex-6.1.3.jar (w/o jaxrx) from your trunk, and yet I was not able to run it as you were able to do. Is there anything I am missing? Ciao Stefano On Fri, May 28, 2010 at 9:15 AM, Lukas Kircher <lukaskircher1(a)googlemail.com> wrote: > Hey Stefano, > > thanks for your report. > >> I am enclosing a java class file that reproduces this problem against >> 6.1.3 basex jar files > > > Unfortunately I wasn't able to reproduce the exception by running your > code - neither with version 6.1.3 nor with our current repository version. > It runs fine on my machine. Do you have a clue where I could've missed > something? > > Or - if you have another case at hand where you encounter the same problem, > just let us know and we'll see what we can do. > > Kind regards, > Lukas >

3 2

rename database
by szabolcs kurdi 28 May '10

28 May '10

Hi! I'm trying to embed BaseX into a smaller java project - pretty much everything works perfectly, but I can't seem to find a way to rename an existing database: am I missing something? I use CreateDB, DropDB and InfoDB - is there something like RenameDB? Or shall I try to rename the directory at the user's home dir in BaseXData? Thank you! Szabolcs Kurdi PS: probably it is widely known, but in the gui the query editor is badly broken with international keyboards (like using the AltGr key).

2 1

Having trouble inserting elements using XQJ two times with the same prepared expression
by Stefano Santoro 27 May '10

27 May '10

Hi Christian, when I try to reuse the same prepared expression the second time with a different bound document I get the following array out of bound exception: java.lang.ArrayIndexOutOfBoundsException: 5 at org.basex.query.up.Primitives.add(Primitives.java:52) at org.basex.query.up.DBPrimitives.add(DBPrimitives.java:40) at org.basex.query.up.Updates.add(Updates.java:91) at org.basex.query.up.Insert.atomic(Insert.java:102) 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:246) at org.basex.api.xqj.BXQPreparedExpression.executeQuery(BXQPreparedExpression.java:54) at NPEReproducer.reproduceNPE(NPEReproducer.java:51) at NPEReproducer.main(NPEReproducer.java:60) I am enclosing a java class file that reproduces this problem against 6.1.3 basex jar files Ciao Stefano

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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

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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

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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

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