BaseX-Talk

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6 participants
5250 discussions

BaseX Cluster Solution based on Galera Cluster
by Jaco van der Merwe 09 Oct '14

09 Oct '14

Hi All, We have recently started using the Galera Cluster for MySQL which works really well as either a single or a multi-master cluster with semi-synchronous replication. See http://galeracluster.com/ for more information. The nice thing about the Galera Cluster is that the cluster and replication management functionality has been abstracted and extracted into a component (actually an .so file) called the WSREP provider. The latter provides hooks that can be integrated into your DB. I was thinking that this could be a very nice solution for providing a cluster solution for BaseX. So my question is whether anybody out there has done this already for BaseX, or may have plans for doing this. Thanks Jaco

2 1

confused
by Rob Stapper 08 Oct '14

08 Oct '14

Hi, I'm confused. The code below results in false() for $e1 and true() for $e2. Shouldn't both be false? I must be overlooking something. Can somebody enlighten me, please? let $node := <node ID="X"><node ID="Y"/></node> let $e1 := exists( trace( $node/node[ ./@ID = "Z"], 'node: ')) let $e2 := exists( $node/node[ ./@ID = "Z"] ) return ( $e1, $e2) Thnx in advance, Rob Stapper --- Dit e-mailbericht bevat geen virussen en malware omdat avast! Antivirus-bescherming actief is. http://www.avast.com

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regex for xquery
by Rob Stapper 08 Oct '14

08 Oct '14

Hi, Basically I want to break down the path-expression of a node in my XML into its elementary steps. QName: "Q{http://www.w3.org/2005/xpath-functions}root()/Q{}A[1]/Q{}B[1]/Q{}C[1]/Q{} D[1]" must become QName-sequence: ("Q{http://www.w3.org/2005/xpath-functions}root()", "Q{}A[1] ", "Q{}B[1] ", "Q{}C[1] ", "Q{}D[1]") So I need to break the path-expression down on the "/"-characters which aren't part of the namespace-uries. I'm using the "fn:tokenize"-function for this. The function uses a "regular expression" for it's separator. Unfortunately my regex-experience is zero (well, two days by now). I came up with the next brilliant ;-) solution: fn:tokenize( path( $node), "/(?=Q)"). Again, unfortunately, this doesn't work because the xquery-flavor of regex doesn't support looking around. Sure, I can use "/Q" as pattern and subsequently stick a "Q" in front of every substring (except the first one) but I'm looking for a solid solution. I there anyone out there with enough "regex-for-xquery"- experience to help me with this? Big thanx for that in advance. @Christian: On the other hand I can imagine that within Basex the path-expression is built from these elementary steps. If so, is it in any way possibly to retrieve this elementary steps sequence instead of this path-expression? Thanx, Rob Stapper --- Dit e-mailbericht bevat geen virussen en malware omdat avast! Antivirus-bescherming actief is. http://www.avast.com

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IllegalMonitorStateException
by Gerald de Jong 07 Oct '14

07 Oct '14

Dear BaseX experts, I'm wondering if anybody can see something that I'm doing wrong. I would expect it to be possible to add documents from multiple threads. Am I wrong about that?? When I set two of my datasets saving documents to BaseX 7.9 at the same time, I get this exception: $ basexserver BaseX 7.9 [Server] Server was started (port: 1984) Exception in thread "Thread-2295" java.lang.IllegalMonitorStateException at java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryRelease(ReentrantReadWriteLock.java:374) at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1260) at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.unlock(ReentrantReadWriteLock.java:1131) at org.basex.core.DBLocking.release(DBLocking.java:219) at org.basex.core.Context.unregister(Context.java:249) at org.basex.core.Command.execute(Command.java:104) at org.basex.core.Command.execute(Command.java:117) at org.basex.server.ClientListener.execute(ClientListener.java:384) at org.basex.server.ClientListener.add(ClientListener.java:355) at org.basex.server.ClientListener.run(ClientListener.java:100) All I am doing is making concurrent calls in two parallel sessions: session = new ClientSession(...) session.execute(new Open(database)) session.execute(new Set("autoflush", "false")) session.add([path string], [document-bytes]) // a zillion times session.execute(new Flush()) During the execution of the parallel add commands, it crashes. The relevant code: def withSession[T](block: ClientSession => T): T = { val session = new ClientSession(host, port, user, pass) try { block(session) } finally { session.close() } } def withDbSession[T](database: String)(block: ClientSession => T): T = { withSession { session => session.execute(new Open(database)) session.execute(new Set("autoflush", "false")) val result = block(session) session.execute(new Flush()) result } } then: withDbSession { session => // many calls to session.add(...) } -- Delving BV, Vasteland 8, Rotterdam http://www.delving.eu http://twitter.com/fluxe skype: beautifulcode +31629339805

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Re: [basex-talk] $ = AltGr + É
by Dániel Kiss-Kálmán 06 Oct '14

06 Oct '14

I think I found somehing but need help to correct it. CTRL Home is the jump to top shortkey. I went to http://www.w3.org/2002/09/tests/keys.html to check CTRL Home = keycode 36, but no charcode AltGR É = keycode 0, charcode 36 (and CTRL and ALT is pressed because of AltGR. so AltGr is nothong more than CTRL + ALT). basex / basex-core / src / main / java / org / basex / gui / layout / BaseXKeys.java line 31: /** Beginning of text. */ TEXTSTART(META, MAC ? VK_UP : VK_HOME), Can oneone please tell me how to correct it if I'm on the right way? maybe check the ALT or any other way? Daniel

2 1

XQException with Basex 7.9
by Erol Akarsu 06 Oct '14

06 Oct '14

I am having syntax error at map(*) where 74'th chracter is first '(' do you know why? I run same script basex gui with base 7.9 w/o issue. declare variable $rawProductsFile as xs:string external; declare variable $schemaFileName as xs:string external; declare variable $tableName as xs:string external; declare variable $outputFileName as xs:string external; (:(line 7 is this line:) declare function local:getFieldMap ($schemaFileName as xs:string) as map(*) javax.xml.xquery.XQException: XQJQS001 - Invalid XQuery syntax, syntax does not pass static validation. Root Cause: net.xqj.basex.bin.bx: Encountered " "(" "( "" at line 7, column 74. Was expecting one of: "*" ... "?" ... "external" ... "{" ... "+" ... at com.ferguson.xquery.RunQueries.queryForFilterData2(RunQueries.java:147) at com.ferguson.endeca.EndecaEngine.processExtractDARFilesExt(EndecaEngine.java:377) at com.ferguson.endeca.EndecaEngine.main(EndecaEngine.java:142) at com.ferguson.xquery.RunQueries.queryForFilterData2(RunQueries.java:147) at com.ferguson.endeca.EndecaEngine.processExtractDARFilesExt(EndecaEngine.java:377) at com.ferguson.endeca.EndecaEngine.main(EndecaEngine.java:142) On Mon, Oct 6, 2014 at 11:20 AM, Dániel Kiss-Kálmán < kisskalmandaniel(a)gmail.com> wrote: > Hello Basex-Talkers, > > when I try to enter a variable I need the $ char. I use hungarian > keyboard, and $ is AltGr + É keyboard combination. The only annoying thing > is when I press AltGr + É, $ appears, but just before that cursor jumps to > the first row first char position. So $ is smiling as the first char in > the first row. No other keboard combination does that, only AltGr + É. So > every time I need a variable I use clipboard instead of pressing $ char. > > Can onyone make my life a little easier to correct it if it is possible at > all? > Or help me how to try to remove that cursor jump? > > Thanks in advance, Daniel >

2 1

Eclipse vs BaseX Gui differences ?
by jean-marc Mercier 06 Oct '14

06 Oct '14

Hi all, Happy to write again in this mailing-list, hope you are all doing well guys ! I am encountering a small problem running my old xquery modules. I guess that it is a classical issue, but I can't remember how to look into BaseX archive :( Here is the description of the problem : I am running a query, calling module_of_mine.xqm, on two different environments. The first one is eclipse, linked to the latest interpreter from BaseX80-20140923.183154 (but I tested also against older interpreter). In this way, this query saturated my 12 G Java machine after some minutes. Then I installed module_of_mine.xqm into BaseX repo, and ran the same query using basex gui with 4G heap size. The query ran perfectly in some 30 sec. My first penny guess is that the built-in BaseX xquery profiler is doing some nice work there ? If so, is there a way to activate / desactivate this profiler from eclipse or from some configuration files ? Cheers, Jean-Marc

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$ = AltGr + É
by Dániel Kiss-Kálmán 06 Oct '14

06 Oct '14

Hello Basex-Talkers, when I try to enter a variable I need the $ char. I use hungarian keyboard, and $ is AltGr + É keyboard combination. The only annoying thing is when I press AltGr + É, $ appears, but just before that cursor jumps to the first row first char position. So $ is smiling as the first char in the first row. No other keboard combination does that, only AltGr + É. So every time I need a variable I use clipboard instead of pressing $ char. Can onyone make my life a little easier to correct it if it is possible at all? Or help me how to try to remove that cursor jump? Thanks in advance, Daniel

1 0

deduplication problem in BaseX 7.9?
by C. M. Sperberg-McQueen 06 Oct '14

06 Oct '14

Consider the following XML document: <article> <front> <article-meta> <aff id="aff1">Tropical and Infectious Disease Hospital, Kathmandu, Nepal</aff> <aff id="aff2">Nagasaki University, Nagasaki, Japan</aff> <aff id="aff3">Department of Radiology, Kyorin University Faculty of Medicine, Tokyo, Japan</aff> <aff id="aff5">Pentax Company Limited, Tokyo, Japan</aff> <aff id="aff6">National Research Laboratory of Molecular Complex Control, Yonsei University, Seoul, Korea</aff>  <article-id pub-id-type="pmc">2570825</article-id> <article-id pub-id-type="pmid">18325280</article-id> <article-id pub-id-type="publisher-id">07-0473</article-id> <article-id pub-id-type="doi">10.3201/eid1403.070473</article-id> </article-meta> </front>  </article For convenience in trying to understand this problem, a copy of this document has been placed at [1]. When I issue the following search against this document, I get unexpected results. let $doc := doc('http://blackmesatech.com/2014/LIS590DML/data/testdata.xml') let $path1 := $doc/child::article/child::front /child::article-meta /child::aff[contains(.,"Japan")] /parent::article-meta/child::article-id, $path2 := $doc/descendant::aff[contains(.,"Japan")] /parent::article-meta/child::article-id, $path3 := $doc/article/front/article-meta/aff[contains(.,'Japan')] /../article-id, $path4 := $doc//aff[contains(.,'Japan')]/../article-id, $path5 := $doc//aff/../article-id return (count($path1), count($path2), count($path3), count($path4), count($path5)) What I expect is that path1, path2, path3, path4, and path5 should all return the same results, namely the set of four article-id elements in the document. So the sequence of counts returned should be 4 4 4 4 4. What I am finding is that path1 and path3 are returning 12 results, with each article-id present three times in the result (once, apparently, for every aff element containing the string 'Japan'). Paths 2, 4, and 5 are all returning 4 results each, as I had expected them to. So the sequence of counts actually returned is 12 4 12 4 4. In BaseX 7.6, for what it's worth, this query returns the sequence 12 12 12 12 20, which seems suggestive. Interestingly, if I initialize the variable $doc with a direct element constructor, along the lines of let $doc := document { <article>...</article> } then all counts come out as expected in 7.6, but in 7.9 the result continues to be 12 4 12 4 4. Is this an error in the handling of the / operator, or am I missing some subtle point? Many thanks. [1] http://blackmesatech.com/2014/LIS590DML/data/testdata.xml -- **************************************************************** * C. M. Sperberg-McQueen, Black Mesa Technologies LLC * http://www.blackmesatech.com * http://cmsmcq.com/mib * http://balisage.net ****************************************************************

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how generating wiki from Basex inspect:xqdoc ?
by jean-marc Mercier 06 Oct '14

06 Oct '14

Hi all, I am using BaseX' inspect:xqdoc module to generate xquery docs. I was wondering how generating html pages for accessing this documentation from the web, as for instance Leo did for http://www.woerteler.de/xquery/modules/base64 ?? Thanx cheers, Jean-Marc

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