BaseX-Talk September 2024

basex-talk@mailman.uni-konstanz.de

9 participants
11 discussions

BaseX 9.6: The Summer Edition
by Christian Grün 28 Nov '24

28 Nov '24

Dear all, We provide you with a new and fresh version of BaseX, our open source XML framework, database system and XQuery 3.1 processor: https://basex.org/ Apart from our main focus (query rewritings and optimizations), we have added the following enhancements: XQUERY: MODULES, FEATURES - Archive Module, archive:write: stream large archives to file - SQL Module: support for more SQL types - Full-Text Module, ft:thesaurus: perform Thesaurus queries - Fulltext, fuzzy search: specify Levenshtein limit - UNROLLLIMIT option: control limit for unrolling loops XQUERY: JAVA BINDINGS - Java objects of unknown type are wrapped into function items - results of constructor calls are returned as function items - the standard package "java.lang." has become optional - array arguments can be specified with the middle dot notation - conversion can be controlled with the WRAPJAVA option - better support for XQuery arrays and maps WEB APPLICATIONS - RESTXQ: Server-Timing HTTP headers are attached to the response For a more comprehensive list of added and updated features, look into our documentation (docs.basex.org) and check out the GitHub issues (github.com/BaseXdb/basex/issues). Have fun, Your BaseX Team

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Setting multiple CSV EXPORTER options is not documented on docs.basex.org
by Omar Siam 02 Oct '24

02 Oct '24

Hi, I just tried after some time to script a CSV export with a BXS file. I forgot how to set multiple options for the csv serialization. In the end this worked: <set option="EXPORTER">method=csv,csv=header=true,,lax=false,,quotes=true</set> I can not find it on docs.basex.org. Perhaps this should be added and explained. Best regards -- Mag. Ing. Omar Siam Austrian Center for Digital Humanities and Cultural Heritage Österreichische Akademie der Wissenschaften | Austrian Academy of Sciences Stellvertretende Behindertenvertrauensperson | Deputy representative for disabled persons Bäckerstraße 13, 1010 Wien, Österreich | Vienna, Austria T: +43 1 51581-7295 omar.siam(a)oeaw.ac.at | www.oeaw.ac.at/acdh

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Equivalent of eXist's util:wait in BaseX?
by Joe Wicentowski 27 Sep '24

27 Sep '24

Hi all, I'm retrieving content from a list of URLs with BaseX (via the http:send-request function) and appear to be hitting rate limits on the remote server. I'd like to pause for 5 seconds between requests. In eXist, I'd use util:wait [1] to handle this pause. Is there an equivalent in BaseX? Or is there a different approach in BaseX? Thanks! Joe [1] https://exist-db.org/exist/apps/fundocs/view.html?uri=http://exist-db.org/x…

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Re: [basex-talk] Error with function-lookup and static variable
by Rob Stapper 21 Sep '24

21 Sep '24

Perfect. Cascaded function-calls through variables within self-recursive constructs work fine now. mvgr. Rob Stapper

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Error with function-lookup and static variable
by Amanda Galtman 20 Sep '24

20 Sep '24

Hi, all. I'm seeing an error in BaseX when I use function-lookup in both a global variable and a function, where the function relies on the variable. I reduced the situation to the following small query: xquery version "3.1"; declare variable $local:lookup := function-lookup(QName("nonexistent", "nonexistent"), 1); declare function local:myfcn() { let $f := ($local:lookup, function-lookup(QName('http://www.w3.org/2005/xpath-functions','string'), 1))[1] return $f('a') }; local:myfcn() When I run it with BaseX 11.1, I get [XQDY0054] Static variable depends on itself: $local:lookup When I run it with Saxon-HE 12, I don't get this error. Is there anything I can do in my code to avoid this error? Thanks, Amanda

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Unknown function db:open
by Kendall Shaw 17 Sep '24

17 Sep '24

I'm using basex 11.2 under WSL ubuntu 24.04 when I use the command xquery count(db:open('some')/*), I see an error message about db prefix being undefined. The same thing from an editor tab. import module namespace db = 'http://basex.org/modules/db'; count(db:open('some')/*) I get the same error message. Is this to be expected? How can I supply what is needed? Thanks, Kendall Shaw

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Re: [basex-talk] BaseX-Talk Digest, Vol 177, Issue 2
by Rob Stapper 12 Sep '24

12 Sep '24

> Op 11-09-2024 12:00 CEST schreef basex-talk-request(a)mailman.uni-konstanz.de: > > > Send BaseX-Talk mailing list submissions to > basex-talk(a)mailman.uni-konstanz.de > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk > or, via email, send a message with subject or body 'help' to > basex-talk-request(a)mailman.uni-konstanz.de > > You can reach the person managing the list at > basex-talk-owner(a)mailman.uni-konstanz.de > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of BaseX-Talk digest..." > > > Today's Topics: > > 1. terrible performance of webserver under BaseX11 (Rob Stapper) > 2. Re: terrible performance of webserver under BaseX11 > (Christian Gr?n) > 3. Re: terrible performance of webserver under BaseX11 > (Christian Gr?n) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 10 Sep 2024 15:31:52 +0200 (CEST) > From: Rob Stapper <r.stapper(a)lijbrandt.nl> > To: "basex-talk(a)mailman.uni-konstanz.de" > <basex-talk(a)mailman.uni-konstanz.de> > Subject: [basex-talk] terrible performance of webserver under BaseX11 > Message-ID: <1197257124.2620908.1725975112156(a)kpc.webmail.kpnmail.nl> > Content-Type: text/plain; charset="utf-8" > > Hi Christian, > > My webserver-app that performed reasenably well under BaseX10 performs terribly under Basex11. Chrome even gives me at the end of the process an 'out of memory' message. So it is not only performance but also resource-usage. I have absolutely no clou how to address this, so all suggestions are very welcome. > > mvgr. > > Rob Stapper >

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Re: [basex-talk] terrible performance of webserver under BaseX11
by Christian Grün 10 Sep '24

10 Sep '24

(cc to the list) For a more helpful response, we would certainly need to look at your code and run it by ourselves. I recommend you to run your function… $SWM:dialog.new …outside your web application, e.g. in the BqseX GUI. This may help you to isolate the problematic part of the code.

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terrible performance of webserver under BaseX11
by Rob Stapper 10 Sep '24

10 Sep '24

Hi Christian, My webserver-app that performed reasenably well under BaseX10 performs terribly under Basex11. Chrome even gives me at the end of the process an 'out of memory' message. So it is not only performance but also resource-usage. I have absolutely no clou how to address this, so all suggestions are very welcome. mvgr. Rob Stapper

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Unexpected error: Improper use? Potential bug? Your feedback is welcome:
by Rob Stapper 03 Sep '24

03 Sep '24

Hi Christian, After the hollidaybreak I found the courage to try to port my application to BaseX's version 112. I get the error-dump shown below. Any idea what is going wrong here? error-dump: ========= Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 11.2 Java: Eclipse Adoptium, 17.0.8 OS: Windows 10, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3 at org.basex.query.func.Closure.setSignature(Closure.java:418) at org.basex.query.func.StaticFuncs$FuncCache.init(StaticFuncs.java:268) at org.basex.query.func.StaticFuncs.check(StaticFuncs.java:83) at org.basex.query.QueryParser.check(QueryParser.java:270) at org.basex.query.QueryParser.parseLibrary(QueryParser.java:198) at org.basex.query.QueryContext.lambda$parseLibrary$1(QueryContext.java:236) at org.basex.query.QueryContext.run(QueryContext.java:763) at org.basex.query.QueryContext.parseLibrary(QueryContext.java:234) at org.basex.query.QueryContext.parse(QueryContext.java:178) at org.basex.http.web.WebModule.qc(WebModule.java:100) at org.basex.http.web.WebModule.parse(WebModule.java:57) at org.basex.http.web.WebModules.parse(WebModules.java:376) at org.basex.http.web.WebModules.parse(WebModules.java:367) at org.basex.http.web.WebModules.parse(WebModules.java:367) at org.basex.http.web.WebModules.cache(WebModules.java:336) at org.basex.http.web.WebModules.find(WebModules.java:149) at org.basex.http.web.WebModules.restxq(WebModules.java:116) at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:44) at org.basex.http.BaseXServlet.service(BaseXServlet.java:69) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587) at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1410) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:598) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1381) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1303) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.Server.handle(Server.java:563) at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149) at java.base/java.lang.Thread.run(Unknown Source) mvgr. Rob Stapper

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BaseX-Talk September 2024