BaseX-Talk

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8 participants
5240 discussions

Restore from Backup: Should it work to restore backup from system A on system B?
by Eliot Kimber 09 Jul '25

09 Jul '25

Using BaseX 11.6 on RHEL 9, I created a backup of a database on system A, copied the zip to my personal machine, then used the DBA upload and restore to recreate the database on the new server. I verified that the Zip has the expected data files, so it looks legit. The database is created but no data is loaded, so the database shows 0 bytes. Should this load have worked? I can also just scp the database from one server to the other if that is reliable, or just unzip the zip on the target server—should that work? Cheers, E. _____________________________________________ Eliot Kimber Sr. Staff Content Engineer O: 512 554 9368 servicenow servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | X<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Instagram<https://www.instagram.com/servicenow>

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Problem (BaseX 12) serializing a map with json:serialize() in combination with the http-client module
by Andreas Hengsbach | nexoma 08 Jul '25

08 Jul '25

Hi everyone, I have found a problem when serializing a map to JSON. I use the following map as request body for the http-client: map { 'username' : "aaa", 'password' : "bbb", 'grant_type' : 'password' } => json:serialize() In 10.4 everything works fine. In 12.0 this now leads to an error when I send the request. (Response from service: <code type="number">400</code><message>Invalid json message received</message>) It seems that the request body is being escaped twice when interacting with the http client. If I omit json:serialize(), it works fine in BaseX 12. I would expect json:serialize() to recognize the map(*) data type and serialize it correctly. Best regards Andreas

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Bug related to copy/modify/return and java binding
by Andreas Hengsbach | nexoma 08 Jul '25

08 Jul '25

Hello everyone, I have probably found a bug that is related to copy/modify/return and the java-binding. Anyway, I couldn't narrow down the problem any further. With the following XQuery-Code I get the result “<A>0</A>” in BaseX 10.4 - as expected. In BaseX 12.0 I get an error message “Cannot invoke ”org.basex.query.func.XQFunction.arity()“ because ‘func’ is null”. (: schnipp :) declare namespace ll = "java:java.util.LinkedList"; declare variable $linkedList := ll:new(); copy $test := <A>{ll:size($linkedList)}</A> modify () return $test (: schnapp :) Full StackTrace: NullPointerException: Cannot invoke "org.basex.query.func.XQFunction.arity()" because "func" is null - [org.basex.query.func.FuncCall.value(FuncCall.java:47), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.up.expr.Transform.value(Transform.java:64), org.basex.query.expr.Pipeline.eval(Pipeline.java:96), org.basex.query.expr.Pipeline.value(Pipeline.java:81), org.basex.query.expr.List.value(List.java:205), org.basex.query.expr.If.value(If.java:159), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Pipeline.value(Pipeline.java:82), org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:147), org.basex.query.expr.gflwor.Where$1.next(Where.java:41), org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:79), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter$1.next(IterFilter.java:36), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.List$1.next(List.java:162), org.basex.query.QueryContext.next(QueryContext.java:395), org.basex.query.expr.constr.Constr.add(Constr.java:73), org.basex.query.expr.constr.CElem.item(CElem.java:140), org.basex.query.expr.constr.CElem.item(CElem.java:32), org.basex.query.expr.ParseExpr.value(ParseExpr.java:54), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.expr.IterFilter.value(IterFilter.java:49), org.basex.query.expr.List.value(List.java:209), org.basex.query.expr.Try.value(Try.java:109), org.basex.query.expr.ParseExpr.iter(ParseExpr.java:49), org.basex.query.scope.MainModule.iter(MainModule.java:53), org.basex.query.QueryContext.lambda$iter$4(QueryContext.java:374), org.basex.query.QueryContext.run(QueryContext.java:770), org.basex.query.QueryContext.iter(QueryContext.java:374), org.basex.query.QueryProcessor.iter(QueryProcessor.java:97) Many thanks and best regards Andreas

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Upgraded from V9.7.3 to V12, problem in xQuery search when node has a blank line
by shripal＠orior.in 07 Jul '25

07 Jul '25

Dear All, I upgraded from v9.7.3 to v12 and all my queries are giving an error because of a simple problem. This is my XML: <xml><number integer="0"><number></xml> xQuery: for $b in //*[@integer] where $b = '' return replace value of node $b with '0' The above works without problems. It puts a zero and this is the result: <xml><number integer="0">0</number></xml> BUT if there is a CRLF in the <number> node it does not replace the node with a 0. <xml><number integer="0"> <number></xml> Now the same query does not work in v12. It works in v9.7.3, so I have had to downgrade. All my queries where I am looking for a blank node have stopped working. Could you please show me some option using which I can ignore the CRLF and continue searching for blank nodes the way I used to be in the past ?

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Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized
by ykhabins＠bellsouth.net 04 Jul '25

04 Jul '25

Hello, Congrats on the BaseX 11.9 release! Installed it, and started to run my XQuery tests. Right away I got the following error: "Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized." Both doc() and collection() are tripping on it. A full repro is below. XQuery #1 ============================================= declare variable $base_dir as xs:string := 'e:\Temp\'; for $docx in collection($base_dir) return $docx XQuery #2 ============================================= declare variable $base_dir as xs:string := 'e:\Temp\'; for $file in file:list($base_dir, false(), 'books*.xml') let $docx := doc($base_dir || $file) return $docx Regards, Yitzhak Khabinsky

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Fulltext processing, "window selection"
by Hans-Juergen Rennau 30 Jun '25

30 Jun '25

Dear BaseX people, it seems to me there is a bug concerning full text processing. The following expression basex "'a single event during the custodial history of a manuscript or other object.' contains text 'custodial history of a manuscript' all words window 5 words" yields "false", shouldn't it yield "true"? Only when I enhance the window width to 10, I get true. 10 would be the required window length if the window started at the beginning of the string. But I think the window should start at the first and end at the last of the words, so 5 should suffice. With kind regards,Hans-Jürgen

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BaseX 12: The Summer Edition
by Christian Grün 26 Jun '25

26 Jun '25

Dear all, Version 12 marks a major leap forward for BaseX – our open-source XML framework, database engine, and XQuery 4.0 processor. This release introduces powerful new features, essential upgrades, and expanded standards support that will elevate how you build, query, and manage XML-driven applications. This is what you get: 🔧 Core Upgrades - Java 17: better performance, long-term support - Jetty 12: better compatibility, future-proofing ✨ XQuery features, 4.0 - Order-Preserving Maps: more intuitive & predictable data structures - Map performance: significantly leaner & faster, close to native Java - Arrays & sequences: Wrapping as arrays in constant time & vice versa - Pipeline Operator: clean, expressive queries with the -> operator - Typed constructs: structured data with item and record constructors - Stack Traces, finally block: better debugging, robust error-handling - While Clauses: better control flow in functional logic - Standardized CSV, JSON, and HTML Parsing, support for Validator.nu - Scripting: launch XQuery expressions as independent jobs - Profiler Optimizations: aggregation of profiled results 🔐 Security & Admin Enhancements - Automatic Admin Password Generation (first startup) - Log Filtering, Masking & Truncation: better control over logging Get the new version and check out our documentation for more details: https://basex.org https://docs.basex.org/main/Changelog Have fun, Your BaseX Team

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Execute an Query function from Java code
by Mauro Mugnaini 24 Jun '25

24 Jun '25

Hi all, I’m trying to invoke an XQuery function (instance of FItem) from a Java class that acts a callback listener for a Java client adapter. I’m able to instantiate and register it in a query module by using the Java bindings, passing the reference to the XQuery code to invoke) but at the moment that the function is invoked a QueryContext instance is needed (or at least the current Context to create it if I understood correctly) of the running BaseX service (an HTTP server in my case). I tried to find a way to do that taking a look of the Jobs module and similar packages in the source code but without success. In the “Java" examples it is shown how to do this for code invoked during a query execution in a class that is a subclass of the QueryModule and by using the ContextDependent annotation that do the job automatically. It is not my case since the code is not directly call during a query execution but asynchronously in a separate thread. Finally my questions: It is something that is possibile to do? Is there some singleton I can access or other classes I can use to achieve that? Thanks and regards. Mauro

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csv:doc - interpretation of option values
by Hans-Juergen Rennau 24 Jun '25

24 Jun '25

Dear BaseX people, a small observation, which might be regarded as a bug (perhaps not). It is about the interpretation of options passed to function csv:doc. I set the 'header' option like this: let $options := map{'header': //header/data()} with the confusing result that the option is ignored, although the comparison $options?header eq 'yes' yields true. If I replace data() with string(), let $options := map{'header': //header/string()} the option works as expected. Kind regards,Hans-Jürgen

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Confirming presence of icu4j
by Joe Wicentowski 16 Jun '25

16 Jun '25

Hi all, I have a query that makes use of the UCA collation with the "numeric" keyword [1] (e.g., for ensuring that "d2" sorts before "d12"), and I'm seeking a way to confirm that the icu4j library is available on the BaseX classpath before I run queries that depend on it. [2] Even though I manually install the icu4j library into Basex's lib/custom directory as specified in [3], I have sometimes forgotten to do so when, for example, Homebrew upgraded BaseX, and as a result my query relying on this collation began producing unexpected results. I've tried to make use of the XQuery 4 fn:collation-available function [4], but so far I've been unsuccessful. Specifically, using BaseX 11.9 or 12 with icu4j-77.1.jar on macOS 15.5 (on Apple Silicon), the following expression returns the expected result: ``` ("d2", "d12") => sort("http://www.w3.org/2013/collation/UCA?numeric=yes") ``` The result, as expected, is ("d12", "d2"), when the library is present and the opposite when it is absent. But the following version, which introduces a conditional and the fn:collation-available function, always takes the "else" path: ``` if (collation-available("http://www.w3.org/2013/collation/UCA?numeric=yes", "compare")) then ("d2", "d12") => sort("http://www.w3.org/2013/collation/UCA?numeric=yes") else "UCA collation not present" ``` I expected this expression to return ("d12", "d2") but instead received "UCA collation not present". Am I misusing/misunderstanding how to use fn:collation-available? Thanks! Joe [1] https://www.w3.org/TR/xpath-functions-31/#uca-collations [2] https://docs.basex.org/main/Full-Text#collations [3] https://docs.basex.org/main/Startup#full_distributions [4] https://docs.basex.org/12/Standard_Functions#fn:collation-available

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