BaseX-Talk

basex-talk@mailman.uni-konstanz.de

6 participants
5269 discussions

how to develop our repository lib package?
by easy 27 Nov '13

27 Nov '13

hi,all, what's the extension package specifinition? can I install exist-db 's xar package into basex? -- 此致 easy 莫愁前路无知己，天下谁人不识君。

2 1

Getting 404s through restxq
by Joe Templeman 26 Nov '13

26 Nov '13

Hi all, we are running basex through jetty and we're seeing basex get into a state where it returns nothing but 404, saying that no function for the request can be found even when they are completely valid paths and when we restart jetty, they work OK again. I can't seem to track down what state it ends up in to cause such a behavior, all of the files are there and nothing changes between restarts. Has anybody ever come across this before? Does anyone have any advice on how best to debug this issue? Thanks, Joe

2 1

Line Number for Node
by Jeremy Moseley 26 Nov '13

26 Nov '13

Hi Guys, I am trying to find the line number of a node in the original XML source file. Is this information possibly stored in the database when the document is parsed? If that is not the case, is it possible to retrieve the original XML file after it has been inserted? Thanks, Jeremy

2 1

Database-level locking
by Charles Duffy 24 Nov '13

24 Nov '13

Howdy -- Something I'd like to see would be the ability to make assertions about which databases a query will need a write lock on, such that the queries will fail at runtime if such an assertion was made but more locks are needed than were declared. This could allow more fine-grained locking to be used in places where global locks presently apply, without loss of safety. ...or is there an existing alternative that I've missed?

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document update timestamp?
by Pascal Heus 24 Nov '13

24 Nov '13

Is there any way to retrieve the date/time a document was pushed into a BaseX database? We have an external tool that needs to sync a folder holding XML files with a BaseX database (and we don't want to reload the entire content each time). Not an issue for new or deleted files but would like to be able to determine if a file/document in the DB is outdated. Note that a db/folder 'sync' feature could be nice to have as built-in feature. Thanks! *P

2 1

search into basex talk archive ?
by jean-marc Mercier 22 Nov '13

22 Nov '13

Hi, is there a (convenient) way to search into basex talk archives ? At present time, I downloaded some of the monthly archive to look at, but it is a little bit tedious... Cheers

2 2

Bug with Full Text functions ?
by Maud Ingarao 20 Nov '13

20 Nov '13

Hi everybody ! We are very excited that our BaseX kit for Digital Humanities Corpus is almost done and we look forward to presenting it to you ! We only have a last bug using the Full Text functions. The very same function call works fine through the rest api but generates a 500 Servor Internal Error through our restxq files. Example (you won't be able to access this private server) : http://ahn-basex.cbp.ens-lyon.fr:8984/rest/Desanti?query=count(collection('Desanti')/*[local-name() = 'ead']/*[local-name() = 'archdesc']/*[local-name() = 'dsc'] //*[local-name() = 'c']/*[local-name() = 'controlaccess']/*[local-name() = 'persname'][text() contains text 'Aristote']) works fine and returns the number of occurrences whereas let $occurrences := count(collection("Desanti")/*[local-name() = 'ead']/*[local-name() = 'archdesc']/*[local-name() = 'dsc']//*[local-name() = 'c'] /*[local-name() = 'controlaccess']/*[local-name() = 'persname'][text() contains text 'Aristote']) generates one of the two ERROR 500 below. PS : ft:count does't work and return 0 occurrences Thanks a lot und bis bald ! Maud and Nathalie HTTP ERROR 500 Problem accessing /desanti/catalogue. Reason: Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7 Java: Sun Microsystems Inc., 1.6.0_27 OS: Linux, amd64 Stack Trace: java.lang.NullPointerException ------------------------------------------------------------------------ /Powered by Jetty:/// or HTTP ERROR 500 Problem accessing /brede/theme. Reason: Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7 Java: Sun Microsystems Inc., 1.6.0_27 OS: Linux, amd64 Stack Trace: java.lang.NullPointerException at org.basex.query.ft.FTContainsExpr.item(FTContainsExpr.java:44) at org.basex.query.ft.FTContainsExpr.item(FTContainsExpr.java:24) at org.basex.query.expr.ParseExpr.ebv(ParseExpr.java:92) at org.basex.query.expr.ParseExpr.test(ParseExpr.java:106) at org.basex.query.expr.Preds.preds(Preds.java:133) at org.basex.query.path.IterStep$1.next(IterStep.java:42) at org.basex.query.path.CachedPath.iter(CachedPath.java:103) at org.basex.query.path.CachedPath.iter(CachedPath.java:106) at org.basex.query.path.CachedPath.iter(CachedPath.java:72) at org.basex.query.expr.ParseExpr.ebv(ParseExpr.java:94) at org.basex.query.expr.ParseExpr.test(ParseExpr.java:106) at org.basex.query.expr.Preds.preds(Preds.java:133) at org.basex.query.path.IterStep$1.next(IterStep.java:42) at org.basex.query.path.IterStep$1.next(IterStep.java:31) at org.basex.query.path.IterPath$1.next(IterPath.java:70) at org.basex.query.path.IterPath$1.next(IterPath.java:41) at org.basex.query.gflwor.For$1.next(For.java:71) at org.basex.query.gflwor.Let$1.next(Let.java:74) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:72) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.gflwor.Let$1.next(Let.java:75) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:72) at org.basex.query.iter.Iter.value(Iter.java:64) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:71) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:62) at org.basex.query.func.StaticFuncCall.iter(StaticFuncCall.java:84) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:76) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.gflwor.Let$1.next(Let.java:75) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:72) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.expr.Switch.value(Switch.java:91) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.gflwor.Let$1.next(Let.java:75) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:72) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:76) at org.basex.query.iter.Iter.value(Iter.java:64) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:71) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:62) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:180) at org.basex.query.func.DynFuncCall.value(DynFuncCall.java:58) at org.basex.query.func.DynFuncCall.iter(DynFuncCall.java:63) at org.basex.query.QueryContext.iter(QueryContext.java:328) at org.basex.query.expr.Constr.add(Constr.java:65) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.QueryContext.iter(QueryContext.java:328) at org.basex.query.expr.Constr.add(Constr.java:65) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.iter(ParseExpr.java:46) at org.basex.query.QueryContext.iter(QueryContext.java:328) at org.basex.query.expr.Constr.add(Constr.java:65) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:62) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:180) at org.basex.query.func.DynFuncCall.value(DynFuncCall.java:58) at org.basex.query.func.DynFuncCall.iter(DynFuncCall.java:63) at org.basex.query.QueryContext.iter(QueryContext.java:328) at org.basex.query.expr.List$1.next(List.java:120) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:62) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.value.item.FuncItem.invValue(FuncItem.java:180) at org.basex.query.func.DynFuncCall.value(DynFuncCall.java:58) at org.basex.query.func.DynFuncCall.iter(DynFuncCall.java:63) at org.basex.query.QueryContext.iter(QueryContext.java:328) at org.basex.query.expr.List$1.next(List.java:120) at org.basex.query.expr.Constr.add(Constr.java:66) at org.basex.query.expr.CElem.item(CElem.java:91) at org.basex.query.expr.CElem.item(CElem.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:68) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.TailFuncCall.value(TailFuncCall.java:47) at org.basex.query.QueryContext.value(QueryContext.java:339) at org.basex.query.func.StaticFunc.invValue(StaticFunc.java:199) at org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:62) at org.basex.query.func.StaticFuncCall.iter(StaticFuncCall.java:84) at org.basex.query.MainModule.iter(MainModule.java:93) at org.basex.query.QueryContext.iter(QueryContext.java:282) at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:73) at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:108) at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:100) at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:31) at org.basex.http.BaseXServlet.service(BaseXServlet.java:58) at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:370) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:949) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1011) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:679) -- /« Ne travaillez jamais »/ *Maud Ingarao* IHPC (UMR 5037) Institut d'histoire de la pensée classique, de l'Humanisme aux Lumières Ecole Normale Supérieure de Lyon - Site Descartes - Bureau R322 15 Parvis René Descartes - BP7000 - 69342 Lyon CEDEX 07 +33 4 37 37 65 79 - maud.ingarao(a)ens-lyon.fr /Je suis absente le vendredi | Out of office on Fridays/ http://pensee-classique.ens-lyon.fr http://institutdesanti.ens-lyon.fr http://ahn.ens-lyon.fr http://www.mutec-shs.fr http://www.projet-plume.org http://www.cahier.paris-sorbonne.fr/

2 1

Bugreport V7.7 java.lang.ArrayIndexOutOfBoundsException
by Bodo Hüsemann 20 Nov '13

20 Nov '13

Hi BaseX team, Using BaseX 7.7 in an embedded Java Application Server Ive encountered the following reproducible error. The error occurs if the same query is issued the second time after the first has been successfully executed (after restarting the server the query will run again the first time ok and the second time with this error). This indicates a potential concurrency or non-closed cursor bug to me, but I dont see the problem and surely we shouldnt get an java.lang.ArrayIndexOutOfBoundsException even if with my bad code quality. Could you please have a look and advise to improve my code, or fix a potential bug? Many thanks in advance, Bodo Error stack trace: WARNING 2013.11.19 23:00:36 Error while loading document: sqlQuery_ora_F30929C659D0CED7525C61A7D149E7D4C0301A18 org.basex.core.BaseXException: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7 Java: Oracle Corporation, 1.7.0_15 OS: Windows 7, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: 2 at org.basex.io.random.TableDiskAccess.flush(TableDiskAccess.java:124) at org.basex.data.DiskData.finishUpdate(DiskData.java:212) at org.basex.core.cmd.Add.run(Add.java:109) at org.basex.core.Command.run(Command.java:345) at org.basex.core.Command.exec(Command.java:321) at org.basex.core.Command.execute(Command.java:78) at org.basex.core.Command.execute(Command.java:90) at org.basex.server.ClientListener.execute(ClientListener.java:386) at org.basex.server.ClientListener.add(ClientListener.java:357) at org.basex.server.ClientListener.run(ClientListener.java:100) at org.basex.server.ClientSession.receive(ClientSession.java:259) at org.basex.server.ClientSession.send(ClientSession.java:246) at org.basex.server.ClientSession.send(ClientSession.java:284) at org.basex.server.ClientSession.add(ClientSession.java:134) at de.infabswissarmy.control.XMLDBManagerBaseX.putDoc(XMLDBManagerBaseX.java:25 2) at de.infabswissarmy.control.XMLDBManagerBaseX.putDoc(XMLDBManagerBaseX.java:56 ) at de.infabswissarmy.control.QueryTask.sqlQuery(QueryTask.java:258) at de.infabswissarmy.control.QueryTask.query(QueryTask.java:138) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:283) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) org.basex.core.BaseXException: java.nio.channels.OverlappingFileLockException at org.basex.server.ClientQuery.cache(ClientQuery.java:81) at org.basex.server.Query.more(Query.java:74) at de.infabswissarmy.control.XMLDBManagerBaseX.query(XMLDBManagerBaseX.java:86) at de.infabswissarmy.control.XMLDBManagerBaseX.queryDoc(XMLDBManagerBaseX.java: 131) at de.infabswissarmy.control.QueryTask.query(QueryTask.java:192) at de.infabswissarmy.control.QueryTask.run(QueryTask.java:283) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Relevant source extract: private static void putDoc(String inContainerName, String inDocumentRef, byte[] inDocument){ ClientSession mySession = null; try { mySession = getClientSession(); // document already exists? if(existsDoc(inContainerName, inDocumentRef)){ // delete old document mySession.execute(new Open(inContainerName)); mySession.execute(new Delete(inDocumentRef)); } mySession.execute(new Open(inContainerName)); // add new document mySession.add(inDocumentRef, new ByteArrayInputStream(inDocument)); } catch (IOException e) { logger.warning("Error while loading document: " + inDocumentRef); e.printStackTrace(); }finally { if (mySession != null){ try { mySession.close(); } catch (IOException e) {} } } } public ArrayList<String> query(String inQuery, String[][] inArgs){ ClientSession mySession = null; ClientQuery myQuery = null; ArrayList<String> tmpString = new ArrayList<String>(); try { mySession = getClientSession(); myQuery = mySession.query(inQuery); // bind variable if (inArgs != null){ for (int i=0; i < inArgs.length; i++){ myQuery.bind("$" + inArgs[i][0], inArgs[i][1]); } } while (myQuery.more()){ tmpString.add(myQuery.next()); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (myQuery != null){ try { myQuery.close(); } catch (BaseXException e) { // ignore } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if (mySession != null){ try { mySession.close(); } catch (BaseXException e){ //ignore } catch (IOException e){ // TODO Auto-generated catch block e.printStackTrace(); } } } return tmpString; }

2 2

Re: [basex-talk] Is it right query using ft:search ?
by John Best 20 Nov '13

20 Nov '13

Hi Dirk, Thanks for your reply.. What will be the query for the following structure - I tried your yesterday's query it achieved the result as required. My structure was not exactly the same as mentioned yesterday. I thought, I would modify it as per my structure. But, I was not successful. Below is my complete structure. I want to search the MainDesc, which have 2 child nodes viz; shortDesc and longDesc. <Docs> <Doc> <DocTitle C="1"></DocTitle> <MainDesc> <shortDesc></shortDesc> <longDesc> some text to make the word(s) bold Optional some text to make the word(s) italic Optional some text to have an underline Optional some text some text </longDesc> </MainDesc> <FullDesc></FullDesc> </Doc> </Docs> ------------------------------------------------------------------------- Hello John, I guess your second query isn't really doing what you intend it to do. Actually, it will yield the same output as your first query (the child step /MainDesc will only have the effect that fragments without MainDesc as a child will be filtered out). I guess the following query should work (at least if I understood correctly what you are trying to achieve): for $x in ft:search("docMaster", ("emf","waves"), map{'mode':='all words'})/parent::*:MainDesc/ parent::*:Doc return $x/DocTitle/text() Thereby, you using the parent step you assure that the found text node was actually inside a MainDesc node. Please also note that there is a difference between an ancestor step and a parent step and as you seem to know your structure it might be easier and faster to simply use parent. Cheers, Dirk -- Have a nice day JBest

2 1

Schema Validation Error
by Paul Fancher 19 Nov '13

19 Nov '13

I am trying to get a working schema validation, and I'm hitting a hangup: Context: db:open("Test","NewXMLSchema.xsd") <schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:tns=" http://www.example.org/NewXMLSchema" targetNamespace=" http://www.example.org/NewXMLSchema" elementFormDefault="qualified"> <element name="test" type="tns:test"/> <complexType name="test"> <sequence> <element name="item" type="string" maxOccurs="unbounded" minOccurs="1"/> </sequence> </complexType> </schema> db:open("Test","NewFile1.xml") <tns:test xmlns:tns="http://www.example.org/NewXMLSchema" xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.example.org/NewXMLSchema NewXMLSchema.xsd "> <tns:item>Poke</tns:item> <tns:item>Poke</tns:item> <tns:item>Poke</tns:item> </tns:test> Test Code: declare namespace tns = "http://www.example.org/NewXMLSchema"; validate:xsd-info("/tns:test", db:open("Test","NewXMLSchema.xsd")) The error message I get back is "Fatal: Content is not allowed in prolog." Any ideas what's going on? Paul shoutout to the the people behind eclipse and the Eclipse XML Editors and Tools for some really awesome development software!

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