BaseX-Talk

basex-talk@mailman.uni-konstanz.de

9 participants
5241 discussions

Possible to get line number of node?
by Eliot Kimber 22 Dec '22

22 Dec '22

I’m pretty sure the answer is “no”, but is there any way from BaseX 9.6 to get the source line number a given node starts on? My use case is I’m looking for specific elements and making a report of documents that contain them and identifying information about the elements to help with finding them outside of BaseX (i.e., in Oxygen where the authoring happens). I’m parsing with the “trim whitespace” option turned off and I’m not doing any DTD-aware parsing, so the elements as loaded into the database will match the source (no additional attributes or anything). So at least in theory BaseX could maintain accurate line numbers. These elements don’t have @id attributes so no natural way to identify them, so it would be useful to be able to report the source line number as a guide to people fixing these elements. I didn’t see anything in the docs so I thought I’d ask just in case I’ve missed some trick. Thanks, E. _____________________________________________ Eliot Kimber Sr Staff Content Engineer O: 512 554 9368 M: 512 554 9368 servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | Twitter<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Facebook<https://www.facebook.com/servicenow>

4 6

Scope of a xPath variable
by Leo Studer 20 Dec '22

20 Dec '22

Hello Cracks ;-) In the code below I encounter the problem, that I have to define the same xPath function variable $organizations twice and I do not understand why. Running the code with the newest versions of BaseX or with Saxon EE, I get a runtime error when I leave the second definition of $organizations out. Any explanation? Thanks in advance. Happy Holidays Always, Leo xquery version "3.1" encoding "UTF-8"; declare variable $doc := doc("factbook.xml"); element Memberships { let $membershipPotentcy := function($orgs){if (count($orgs)le 0) then 'none' else if (count($orgs) le 5) then 'few' else 'many'} let $organizations := function($country){$doc//organization[members/@country = $country/@id]/@abbrev/string(.)} for $countries in $doc//country group by $mp:= $membershipPotentcy($organizations($countries)) order by $mp return element {$mp} { for $country in $countries let $organizations := function($country){$doc//organization[members/@country = $country/@id]/@abbrev/string(.)} order by $country/@name return <country>{$country/@name, $organizations($country)}</country> }}

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What ever happened to the idea of exposing BaseX+FS as a Fuse filesystem?
by Alejandro Garcia 19 Dec '22

19 Dec '22

I've been reading Alexander Holupirek, 2012: Declarative Access to Filesystem Data Thesis and I think it is very interesting and very relevant today in an era of people wanting to build a "second brain". Thanks in advance

2 1

Potential bug?
by Philippe Pons 15 Dec '22

15 Dec '22

Hi all, I tried to replace a database in the BaseX Database Administration (dba). A simple task that I often do. But this time, I get this message: Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact:basex-talk@mailman.uni-konstanz.de Version: BaseX 9.2.1 Java: Oracle Corporation, 1.8.0_231 OS: Linux, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: 1 at org.basex.io.random.TableDiskAccess.fpre(TableDiskAccess.java:507) at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:468) at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:156) at org.basex.data.Data.kind(Data.java:304) at org.basex.query.value.node.DBNode.<init>(DBNode.java:50) at org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:139) at org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:164) at org.basex.query.func.db.DbOpen.value(DbOpen.java:19) at org.basex.query.func.StandardFunc.optimize(StandardFunc.java:82) at org.basex.query.expr.Arr.compile(Arr.java:43) at org.basex.query.expr.path.Path.compile(Path.java:129) at org.basex.query.expr.If.compile(If.java:58) at org.basex.query.func.StaticFunc.comp(StaticFunc.java:69) at org.basex.query.QueryCompiler.compile(QueryCompiler.java:114) at org.basex.query.QueryCompiler.compile(QueryCompiler.java:105) at org.basex.query.QueryContext.compile(QueryContext.java:312) at org.basex.query.QueryContext.iter(QueryContext.java:331) at org.basex.http.restxq.RestXqResponse.serialize(RestXqResponse.java:73) at org.basex.http.web.WebResponse.create(WebResponse.java:56) at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:54) at org.basex.http.BaseXServlet.service(BaseXServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:505) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:786) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:743) at java.lang.Thread.run(Thread.java:748) Could you help me to find a solution? Many thanks, Philippe

3 3

Re: [basex-talk] parsing error using the new http-client in BaseX 10.x http module
by Andreas Hengsbach | nexoma 07 Dec '22

07 Dec '22

Sorry, it was a simple dependency problem. I forgot to include tagsoup. Best regards Andreas

1 0

parsing error using the new http-client in BaseX 10.x http module
by Andreas Hengsbach | nexoma 07 Dec '22

07 Dec '22

Hi all, it seems that the new http client in basex 10.x behaves differently when evaluating the response. If, for example, an API that usually delivers JSON then delivers an HTML page on a 404, I run into a parser problem. [experr:HC0002] Conversion failed: Stopped at ., 1/1: [json:parse] (1:1): Unexpected JSON value: '<br />...'. The error page is correctly delivered with content type "text/html". How is it decided which parser to use? I would have expected the content type of the response to be used. Has anyone else observed this behaviour? This is how I used the http module: let $response := http:send-request(<http:request method='post' ><http:body media-type='application/json'/></http:request>, fn:concat($host, $apiKey), $body) return ( (: do someting :) ) The problem definitely does not occur with BaseX 9.x. Many thanks and best regards Andreas

1 0

BaseX GraalVM native-image
by dliakh＠gmail.com 03 Dec '22

03 Dec '22

Hello Everyone, Didn't anybydy try and is that possible to convert the BaseX JAR to a "native-image" (using GraalVM's convertor or any other tool maybe)? The reason: I have to use BaseX in scripts and Makefiles as an XQuery engine and have to call it often. The problem is the JVM startup time affects the performance significantly when it has to start multiple times. I tried just naïvely running the GraalVM's native-image convertor against the BaseX103.jar file and got errors with long backtraces (that I didn't quite understand to be honest). Did anybody try that, maybe? Best regards

5 6

RBaseX version 1.1.2
by Ben Engbers 02 Dec '22

02 Dec '22

Hi, Version 1.1.2 of RBaseX-client has been accepted by CRAN. Differences with version 1.1.1 are that 'Store' and 'Replace' have been replaced by 'put' and 'putBinary' and that now the tests have to been executed with Test/testBasex credentials. The daily download-average of RBaseX is 10. But since I haven't received any feedback yet, I don't know to what extent this package contributes to Basex's popularity. Ben Engbers

1 0

Server Performance
by Johannes Bauer 01 Dec '22

01 Dec '22

Hi all, we have two Linux server VMs where our BaseX application is running - Integration - Production The used database is about 5 GB including a fulltext index and is identical on both systems. The production VM is more potent in all aspects (CPU, RAM, Disk IO, ...). Dispite all of that we do not get any significantly better performance in the production system. On top of that we even have XQuery requests that sporadically take very long (> 1 minute) that would normally take only less than one second. Again these long requests only happen in the production environment. My first assumption was that maybe it is due to additional load on the server from other sources. But that was not the case. We have the spikes even when there is no load at all. Has anyone similar experiences or any ideas what could be the cause for this behaviour? Best Regards Johannes

3 3

right way to create a db in the middle of processing?
by Graydon Saunders 28 Nov '22

28 Nov '22

Hello -- So I've got a pattern where I want to: 1. perform some processing using proc:execute() on a directory tree of XML files (easy) 2. load the result of the processing (a parallel structure tree of XML files) into a new db (in principle, easy; db:create() does this) 3. extract information from the newly created db and write that to a file (easy) 4. use proc:execute() to run different processing on the file written in step 3 (easy, I think) 5. load the result (thankfully a single file) and process it with a query (easy, I can stuff that in a function) Ideally, this winds up as something invoked from a single query file as a sequence of functions because its eventual fate is to be part of an automated test that would ideally be a "run this one thing, look at the boolean result". I hang up on step 2; so far as I can tell, there isn't a way to say "go create a database and then make it usable to these other modules that are guaranteed not to happen until db:create() has completed" but this seems like such a common thing to want to do that I feel like I must be missing something. Thanks! Graydon

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