August 2024 - BaseX-Talk - mailman.uni-konstanz.de

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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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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Alternatives to JTattoo in combination with BaseX GUI?
by Zimmel, Daniel 03 Sep '24

03 Sep '24

Hi, I noticed that JTattoo is no longer working properly with BaseX 11 (which is not a surprise because it looks like an abandoned project). I liked to use it to force a dark theme to the GUI. Does anybody know of alternatives? Are there any? Thanks, Daniel

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xquery insert via REST API
by Liedtke, Alexander 28 Aug '24

28 Aug '24

Hallo in die Runde, vielleicht kann mir hierzu jmd einen Tipp geben. Ich nutze die Rest API um via post xqueries (mit python requests) zu machen - das klappt mit z.B. replace auch problemlos. Gerne würde ich jedoch auch insert nutzen - allerdings bekomme ich hier grundsätzlich eine 500 response. Die query mache ich gemäß der Doku nach dem Beispielschema: insert nodes (<phone/>, <mail/>) into //name In den Logs von dba sehe ich hierzu nichts. Ich bekomme auch sonst keine Info auf der shell in Form einer Fehlermeldung. Der Test Request sieht wie folgt aus: xq = '<query><text> insert node <test/> into //object[@id="574"]</text></query>' url = 'http://localhost:8080/rest/ids/ObjectIDs.xml' header = {'Media-Type': 'application/xml', 'charset':'utf-8'} res = requests.post(url, headers=header, data=xq, auth=_auth.getBaseXAuth()) Hat hierzu vielleicht jemand Anmerkungen / Ideen? Vielen Dank im Voraus Alexander Liedtke

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Basex java.lang.ArrayIndexOutOfBoundsException
by Chavez, Robert 19 Aug '24

19 Aug '24

Greetings, We are suddenly seeing the following error message when using the REST API and also when using to Web GUI when trying to list the contents of a database by clicking on the database name and also when clicking on “optimize” (screen shot of gui attached). Does anyone have experience with hw to handle this? Version: BaseX 10.4 Java: Amazon.com Inc., 17.0.12 OS: Linux, amd64 Thank you, Robert Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de<mailto:basex-talk@mailman.uni-konstanz.de> Version: BaseX 10.4 Java: Amazon.com Inc., 17.0.12 OS: Linux, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: Index 2147483647 out of bounds for length 17322 at org.basex.io.random.TableDiskAccess.fpre(TableDiskAccess.java:514) at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:474) at org.basex.io.random.TableDiskAccess.read5(TableDiskAccess.java:180) at org.basex.data.Data.textRef(Data.java:467) at org.basex.data.DiskData.text(DiskData.java:272) at org.basex.query.func.db.DbListDetails$2.get(DbListDetails.java:96) at org.basex.query.func.db.DbListDetails$2.get(DbListDetails.java:1) at org.basex.query.func.fn.FnSubsequence.value(FnSubsequence.java:108) at org.basex.query.expr.IterMap.value(IterMap.java:106) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:146) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:78) at org.basex.query.QueryContext.next(QueryContext.java:375) at org.basex.query.expr.constr.Constr.add(Constr.java:73) at org.basex.query.expr.constr.CElem.item(CElem.java:149) at org.basex.query.expr.constr.CElem.item(CElem.java:1) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:51) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.expr.constr.Constr.add(Constr.java:72) at org.basex.query.expr.constr.CElem.item(CElem.java:149) at org.basex.query.expr.constr.CElem.item(CElem.java:1) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:51) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.expr.List$1.iter(List.java:213) at org.basex.query.expr.List$1.next(List.java:181) at org.basex.query.QueryContext.next(QueryContext.java:375) at org.basex.query.expr.constr.Constr.add(Constr.java:73) at org.basex.query.expr.constr.CElem.item(CElem.java:149) at org.basex.query.expr.constr.CElem.item(CElem.java:1) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:51) at org.basex.query.func.StaticFuncCall.evalArgs(StaticFuncCall.java:147) at org.basex.query.func.FuncCall.value(FuncCall.java:53) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:82) at org.basex.query.scope.MainModule$1.next(MainModule.java:55) at org.basex.http.restxq.RestXqResponse.serialize(RestXqResponse.java:79) at org.basex.http.web.WebResponse.create(WebResponse.java:58) at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:72) at org.basex.http.BaseXServlet.service(BaseXServlet.java:69) at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.base/java.lang.Thread.run(Thread.java:840)

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recursively used variables
by Rob Stapper 12 Aug '24

12 Aug '24

Hi, The code[1] below and send as attachment generates a error message: “Static variable depends on itself: $Q{http://www.w3.org/2005/xquery-local-functions}test”. I use these variables to refer to my private functions in my modules so I can easyly refer to them in a inheritance situation. It’s not a big problem for me but I was wondering if the error-triggering is justified or that it should work. [1]=========================================== declare variable $local:test := local:test#1 ; declare %private function local:test( $i) { if ( $i > 0) then $local:test( $i - 1) } ; $local:test( 10) =========================================== Kind regards, Rob Stapper Sent from Mail for Windows 10 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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Bug report
by Csaba Fekete 12 Aug '24

12 Aug '24

Hello The following works on Basex 10.7 but fails on Basex 11.1. The command I'm trying to run is: /opt/basex/bin/basex -v -c'OPEN mydb; ADD "/tmp/ZTH4ZRO.xml"' I've attached the XML file.The output I'm getting: Database 'mydb' was opened in 54.52 ms. Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 11.1 Java: Ubuntu, 11.0.19 OS: Linux, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: arraycopy: length -1 is negative at java.base/java.lang.System.arraycopy(Native Method) at org.basex.util.Array.insert(Array.java:99) at org.basex.util.list.ObjectList.insert(ObjectList.java:153) at org.basex.index.resource.Docs.insert(Docs.java:166) at org.basex.index.resource.Resources.insert(Resources.java:71) at org.basex.data.Data.indexAdd(Data.java:1098) at org.basex.data.Data.insert(Data.java:836) at org.basex.query.up.atomic.Insert.apply(Insert.java:44) at org.basex.query.up.atomic.AtomicUpdateCache.applyUpdates(AtomicUpdateCache.java:291) at org.basex.query.up.atomic.AtomicUpdateCache.execute(AtomicUpdateCache.java:275) at org.basex.core.cmd.Add.lambda$run$0(Add.java:62) at org.basex.core.cmd.ACreate.update(ACreate.java:90) at org.basex.core.cmd.Add.run(Add.java:56) at org.basex.core.Command.run(Command.java:233) at org.basex.core.Command.execute(Command.java:93) at org.basex.api.client.LocalSession.execute(LocalSession.java:131) at org.basex.api.client.Session.execute(Session.java:36) at org.basex.core.CLI.execute(CLI.java:94) at org.basex.core.CLI.execute(CLI.java:78) at org.basex.core.CLI.execute(CLI.java:65) at org.basex.BaseX.<init>(BaseX.java:82) at org.basex.BaseX.main(BaseX.java:44)

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Typos in BaseX documentation
by Amanda Galtman 09 Aug '24

09 Aug '24

Hi, BaseX team. I found a couple of typos in the BaseX documentation. I wouldn't mind fixing them myself if I knew how to do so in the new RESTXQ format. Is the source in GitHub, and are BaseX users encouraged to contribute corrections to the documentation? Here are the details, in case you'd rather fix them yourself. Typo 1: The page https://docs.basex.org/main/Standard_Functions starts with a stray "f" ("fThis page presents") Typo 2: On the page https://docs.basex.org/main/File_Functions, the following example is missing a closing curly brace before the final parenthesis: file:write('data.bin', xs:hexBinary('414243'), { 'method': 'basex') Thanks, Amanda

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Ignoring non-fatal XML syntax issues in third-party HTML from command line
by Ross Goldberg 08 Aug '24

08 Aug '24

I am trying to use an xpath passed to basex on the macOS command line to extract data from a downloaded third-party HTML file. The file isn't completely valid xml syntax (but only in elements that aren't referenced by my xpath), so basex outputs errors instead of the data that I want. How can I configure basex to ignore xml syntax issues that aren't fatal for my xpath? If it cannot be so configured: - could that option be added as a new feature? - in the meantime, what other macOS command-line xpath parsers can ignore non-fatal XML syntax issues? Which of those support the newest versions of xpath, are performant, etc.? Thanks. Sent with Proton Mail secure email.

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