BaseX-Talk December 2013

basex-talk@mailman.uni-konstanz.de

54 participants
77 discussions

map:module. Behavior of maps of nodes
by jean-marc Mercier 23 Dec '13

23 Dec '13

Hello, The following query map:size(map:new(({<dummy>dummy</dummy>:""},{<doudou>dummy</doudou>:""}))) returns ..1. Does it means that the map module uses the function fn:data() to compute keys for nodes ?? Cheers Jean-Marc

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7.7.x UI freeze
by Pascal Heus 23 Dec '13

23 Dec '13

Recently upgraded to 7.7.2 from 7.6 and getting UI freeze on MacOSX when I try to open existing databases. When opening from the interactie command prompt, I get a message that the format has changed and I need to rebuild indexes. No problem if I create a new database. Anyone else experiencing similar issue? What should I do to bring existing DB to a compatible state? thanks *P

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Re: [basex-talk] initial installation observation
by e-letter 20 Dec '13

20 Dec '13

On 19/12/2013, basex-talk-request(a)mailman.uni-konstanz.de <basex-talk-request(a)mailman.uni-konstanz.de> wrote: > Today's Topics: > > 4. Re: initial installation observation (Christian Gr?n) > ------------------------------ > > Message: 4 > Date: Thu, 19 Dec 2013 12:29:06 +0100 > Subject: Re: [basex-talk] initial installation observation > >>> You can optionally check out the following Wiki article to see what >>> other startup options may be helpful: >>> >>> http://docs.basex.org/wiki/Start_Scripts Starting the command terminal fails: $ basex BaseX 7.7.2 [Standalone] Try help to get more information. > OPEN xmldatabasefile.xml Stopped at ., 1/21: Syntax: OPEN [name] ([path]) Open database. Opens the database [name], filtered by [path]. > OPEN xmldatabasefile.xml /path/to/file Stopped at ., 1/21: Syntax: OPEN [name] ([path]) Open database. Opens the database [name], filtered by [path]. > OPEN xmldatabasefile.xml, /path/to/file Stopped at ., 1/21: Syntax: OPEN [name] ([path]) Open database. Opens the database [name], filtered by [path]. How to open the database file, please? -- basex772

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bug? lock. is there some guild on how to do concurrent update in rexq service?
by easy 19 Dec '13

19 Dec '13

hi,all, This is the errror message: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7.2 Java: Sun Microsystems Inc., 1.6.0_24 OS: Linux, amd64 Stack Trace: java.lang.IllegalMonitorStateException: Thread already holds one or more locks. at org.basex.core.DBLocking.acquire(DBLocking.java:106) at org.basex.core.Context.register(Context.java:239) at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:69) 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.j ava:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.jav a:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandl er.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandl er.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java: 384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandle r.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandle r.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j ava: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(Abstrac tHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpC onnection.java:960) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.conten t(AbstractHttpConnection.java:1021) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnecti on.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEn dPoint.java:668) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEnd Point.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPoo l.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool .java:543) at java.lang.Thread.run(Thread.java:679) Improper use? Potential bug? Your feedback is welcome: -- 此致 easy 莫愁前路无知己，天下谁人不识君。

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Successive update queries for restxq
by Tojo Rakotoarison 19 Dec '13

19 Dec '13

Hi, I would like to make successive updates on a database using RESTXQ. For example : db:create(...) then db:add(...) on the newly created database. But, it seems impossible to do it in the same query because of the order in which the functions are processed. Is there a workaround for that without asking the user to send two requests manually ? For example, if there could be a way to redirect to a new query or Restxq, or something like that. Thanks ! Best regards,

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standalone or client/server for test scenario
by e-letter 19 Dec '13

19 Dec '13

Readers, For the scenario described elsewhere (http://www.mail-archive.com/talk@x-query.com/msg00786.html), which is correct to use please, standalone or clien/server modes, for initial testing? Is this choice important, or can be ignored?

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initial installation observation
by e-letter 19 Dec '13

19 Dec '13

Readers, Basex772 jar file was installed into a directory /usr/local/basex A symbolic link was created: cat >> /usr/local/bin/basex java -jar /usr/local/basex/basex772.jar In normal user home directory, basex started from command terminal, but the command line options are not active, e.g. 'basex -h' does not show the help file in the command terminal, but starts basex standalone. Also command terminal 'basex -i /path/to/existing/xmlfile.xml' does not open the xml file, but starts basex.

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Issues inserting nodes with @xml:lang
by France Baril 18 Dec '13

18 Dec '13

Hi, I am trying to figure out how to allow the use of @xml:lang in an .xqm. I've been using it before without the need to add any declaration, but in this case I am getting an error: Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7.2 Java: Apple Inc., 1.6.0_65 OS: Mac OS X, i386 Stack Trace: ... I am able to reproduce the error and get rid of it simply by adding or removing @xml:lang attributes in my content. I have attached a simple example, you'll need a db named tests to receive the result. - If you run the .xqm as is, you should get the unexpected error. - If you remove all @xml:lang="en-us" in the function test-nodes:get-trans-units-1(), the result node will be saved in the tests db. What am I missing? -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com (514) 572-0341

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Array Size Exceptions
by Jeremy Moseley 17 Dec '13

17 Dec '13

Hi Guys, Running into some strange exceptions when trying to make changes to data in the database. The function is updating all attributes in a project to include lower case copies. When doing this on specific projects, it consistently fails with the stack trace below. Any thoughts? Cheers, Jeremy XQuery: (: Get all documents pertaining to this project :) let $docs := project:get-docs($shortname, $revision, $environment) > return ( > for $node in $docs/s9:toc//*[(@designation != "" and > not(@designation-lower)) > or (@enumeration != "" and > not(@enumeration-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'designation-lower' } { > lower-case($node/@designation) }) into $node, > insert node (attribute { 'enumeration-lower' } { > lower-case($node/@enumeration) }) into $node > ), > for $node in $docs/*[(@designation != "" and not(@designation-lower)) > or (@enumeration != "" and > not(@enumeration-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'designation-lower' } { > lower-case($node/@designation) }) into $node, > insert node (attribute { 'enumeration-lower' } { > lower-case($node/@enumeration) }) into $node > ), > for $node in $docs//*[(@title != "" and not(@title-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'title-lower' } { > lower-case($node/@title) }) into $node > ), > insert node (attribute {'optimized'} { "yes" }) into $collection, > prof:void(metrics:timing("optimize-attributes", "get", "200", > string(prof:current-ms() - $start))) > ) Stack Trace: > HTTP/1.1 500 Unexpected error: Improper use? Potential bug? Your feedback > is welcome: > Contact: basex-talk(a)mailman.uni-konstanz.de > Version: BaseX 7.7.2 > Java: Apple Inc., 1.6.0_65 > OS: Mac OS X, x86_64 > Stack Trace: > java.lang.NegativeArraySizeException > at org.basex.io.random.DataAccess.readBytes(DataAccess.java:200) > at org.basex.io.random.DataAccess.readToken(DataAccess.java:178) > at org.basex.io.random.DataAccess.readToken(DataAccess.java:169) > at org.basex.data.DiskData.txt(DiskData.java:267) > at org.basex.data.DiskData.text(DiskData.java:235) > at org.basex.index.value.DiskValues.readKeyAt(DiskValues.java:285) > at org.basex.index.value.DiskValues.get(DiskValues.java:441) > at > org.basex.index.value.UpdatableDiskValues.index(UpdatableDiskValues.java:66) > at org.basex.data.DiskData.indexEnd(DiskData.java:356) > at org.basex.data.Data.insert(Data.java:817) > at org.basex.data.Data.insertAttr(Data.java:672) > at org.basex.data.atomic.InsertAttr.apply(InsertAttr.java:31) > at > org.basex.data.atomic.AtomicUpdateList.applyStructuralUpdates(AtomicUpdateList.java:300) > at > org.basex.data.atomic.AtomicUpdateList.execute(AtomicUpdateList.java:288) > at org.basex.query.up.DatabaseUpdates.apply(DatabaseUpdates.java:184) > at org.basex.query.up.ContextModifier.apply(ContextModifier.java:103) > at org.basex.query.up.Updates.apply(Updates.java:120) > at org.basex.query.QueryContext.update(QueryContext.java:313) > at org.basex.query.QueryContext.value(QueryContext.java:297) > 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:575) > 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.Dispatcher.forward(Dispatcher.java:276) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:103) > at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:118) > 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:575) > 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.Dispatcher.forward(Dispatcher.java:276) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:103) > at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:118) > 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:695)

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Performance questions
by José Tomás Atria 17 Dec '13

17 Dec '13

Dear all, I have a possibly dumb/trivial question with regards to resource utilization with BaseX. It's basically two things: 1) I'm working with a database that is smaller than the available memory in my main research machine. I noticed the MAINMEM option, but for some reason I couldn't get it to work, and then noticed that it would only affect newly created db's. Is it possible to tell BaseX to create a db in disk, and then load it into memory in full? would this increase performance? Would something like SET MAINMEM = true COPY DB 'diskDB' 'memDB' achieve something along these lines? 2) The machine I'm working on has a quad core processor. Is there anyway to process queries in parallel to take advantage of this? I made some superficial attempts through splitting queries and running them simultaneously, but it seems that the server is still confined to one cpu. I understand that adding multithreading support could be unnecesary and out of the scope of the project, but I thought of asking since I was already coming here to ask about memory. Thanks for any tips! jta. -- entia non sunt multiplicanda praeter necessitatem

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BaseX-Talk December 2013