BaseX-Talk July 2025

basex-talk@mailman.uni-konstanz.de

8 participants
5 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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BaseX-Talk July 2025