BaseX-Talk August 2014

basex-talk@mailman.uni-konstanz.de

31 participants
59 discussions

Query Cache?
by Christopher Yocum 24 Aug '14

24 Aug '14

Dear List, I have a query (included below) which uses full text searching and it is fairly slow using BaseX 7.9 (5-8 seconds). I was wondering if there was a query cache implemented in BaseX? I ask because the GUI seems to keep a cache around because the same query goes from 5000ms to 204ms if I run it twice in the GUI. The query looks like this: declare variable $term as xs:string external; declare variable $col as xs:string external; <results>{subsequence(ft:mark(for $x in collection($col)//entry where $x//text()[. contains text {$term} using wildcards] order by fn:lower-case(fn:replace(($x//orth[1]/text())[1], '\\p{P}|\\d+','')) collation \"?lang=ga\" return $x), 1, 5000)}</results> Thanks for any help you can provide. Chris Yocum

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Downloading files
by Lars Johnsen 21 Aug '14

21 Aug '14

I am using BaseX restxq for accessing a repository from a web browser. Uploading files works smoothly, but I can't see how to make a download button work. For uploading, the recipie on the restxq help page was enough to get it to work. Is there a corresponding way for making downloading work? What I have tried is to let BaseX send a html-page containing: <form method="get" action="/download/{$file}"> <button type="submit">Download</button> </form> To process this form is the following restfunction declare %rest:path("/download/{$file}") %output:method("html") function page:download-file($file) { ... } Inside the curly braces, I have tried an <a href..> element and file:read-binary, but none of them with any success. BaseX complains about the <a> element, and file:read-binary outputs directly to the browser. Any suggestions?

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pagination implementation.
by Kunal Chauhan 21 Aug '14

21 Aug '14

Hi, I want to implement pagination through Basex. results should be retrieved as per given range / size. and I don't want to modify XQuery. is there any way to achieve this requirement ? - Kunal Chauhan

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Why does BaseX create empty System-properties
by rune.engh＠fatax.no 21 Aug '14

21 Aug '14

Thanks Christian, it works! So does the previous snapshot. I probably experienced some classloading/caching issues of the BaseX79.jar in my IDE. In any case - my bad. I do not know where setProperty('user.timezone','Europe/Oslo') comes from. Thanks again for your great help! Best Rune

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Re: [basex-talk] random:integer vs. random:seeded-integer
by Amanda Galtman 19 Aug '14

19 Aug '14

Thanks, Christian! Cheers, Amanda > Date: Tue, 19 Aug 2014 16:04:17 +0200 > From: Christian Gr?n <christian.gruen(a)gmail.com> > To: Dirk Kirsten <dk(a)basex.org> > Cc: BaseX <basex-talk(a)mailman.uni-konstanz.de> > Subject: Re: [basex-talk] random:integer vs. random:seeded-integer > Message-ID: > <CAP94bnObngxdY3GmJABJYsxF8Bt4WJBcyFeQf- > 3QwGfrPJzAOg(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi Amanda, > > I have extended Dirk's pull request and added new error codes [1]; a new > snapshot is available [2]. > > Best, > Christian > > [1] http://docs.basex.org/wiki/Random_Module > [2] http://files.basex.org/releases/latest/ > > On Mon, Aug 18, 2014 at 5:10 PM, Dirk Kirsten <dk(a)basex.org> wrote: > > Hello Amanda, > > > > I agree, this behaviour is inconsistent. I am not quite sure what is > > the best way to go here. Raising no error and simply returning 0 (as > > it is currently done for random:integer() if max is out of range) > > seems pretty dangerous to me, considering that randomness is often > > used for security and an unexpected 0 might be hazardous. > > Raising a Java error is maybe not the most elegant thing, maybe an > > XQuery error would be more elegant (like FOAR0001, see > > https://docs.basex.org/wiki/XQuery_Errors). > > > > I created a small pull request, which also throws an error for > > random:integer() if max is out of range, see > > https://github.com/BaseXdb/basex/pull/985. > > > > Cheers, > > Dirk > > > > On 18/08/14 15:56, Amanda Galtman wrote: > >> Hi, > >> > >> Is it intentional that random:integer lets you use zero or a negative value > for $max, but random:seeded-integer errors out in those cases? I know > these are edge cases. I'm only flagging them because of the inconsistency > between the two similar functions. > >> > >> (: Returns (0,0). :) > >> (random:integer(0),random:integer(-5)) > >> > >> (: Errors out :) > >> random:seeded-integer(31,1,0) > >> > >> (: Errors out :) > >> random:seeded-integer(31,1,-5) > >> > >> > >> Here is the error information from the last command above. > >> > >> Error: > >> Improper use? Potential bug? Your feedback is welcome: > >> Contact: basex-talk(a)mailman.uni-konstanz.de > >> Version: BaseX 7.9 > >> Java: Oracle Corporation, 1.7.0_25 > >> OS: Windows 7, amd64 > >> Stack Trace: > >> java.lang.IllegalArgumentException: n must be positive > >> at java.util.Random.nextInt(Unknown Source) > >> at org.basex.query.func.FNRandom$1.next(FNRandom.java:85) > >> at org.basex.query.MainModule$1.next(MainModule.java:98) > >> at org.basex.query.QueryContext.execute(QueryContext.java:598) > >> at org.basex.query.QueryProcessor.execute(QueryProcessor.java:101) > >> at org.basex.core.cmd.AQuery.query(AQuery.java:82) > >> at org.basex.core.cmd.XQuery.run(XQuery.java:22) > >> at org.basex.core.Command.run(Command.java:329) > >> at org.basex.core.Command.execute(Command.java:94) > >> at org.basex.gui.GUI.exec(GUI.java:417) > >> at org.basex.gui.GUI.access$500(GUI.java:41) > >> at org.basex.gui.GUI$8.run(GUI.java:361) > >> > >> > >> Cheers, > >> Amanda > >> > > > > -- > > Dirk Kirsten, BaseX GmbH, http://basex.org > > |-- Firmensitz: Blarerstrasse 56, 78462 Konstanz > > |-- Registergericht Freiburg, HRB: 708285, Gesch?ftsf?hrer: > > | Dr. Christian Gr?n, Dr. Alexander Holupirek, Michael Seiferle > > `-- Phone: 0049 7531 28 28 676, Fax: 0049 7531 20 05 22

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BaseX for dummies
by Paul Swennenhuis 19 Aug '14

19 Aug '14

Hello list, I am pleased to announce a new introduction in BaseX, targeted at beginning BaseX users in general, and to PHP/Javascript developers in particular. The introduction is added as PDF to the BaseX introduction page at http://docs.basex.org/wiki/Getting_Started. The title is 'BaseX for dummies'. There is also a link to a ZIP package that contains the files mentioned in the PDF. Feedback is welcome! Prosit, Paul

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MIXUPDATES?
by Marco Lettere 19 Aug '14

19 Aug '14

Hi all, I wanted to start using the MIXUPDATES feature steadily but whatever latest version I download it's always telling basex80/basex/.basex: Unknown option 'MIXUPDATES'. I am pretty sure I already tried it few months ago so now I'm pretty clueless. Could anyone please point me to the right package to download? Thank you, Marco. P.S. I tried with http://files.basex.org/releases/latest/BaseX80-20140814.235204.zip and http://files.basex.org/releases/BaseX-latest.zip

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random:integer vs. random:seeded-integer
by Amanda Galtman 19 Aug '14

19 Aug '14

Hi, Is it intentional that random:integer lets you use zero or a negative value for $max, but random:seeded-integer errors out in those cases? I know these are edge cases. I'm only flagging them because of the inconsistency between the two similar functions. (: Returns (0,0). :) (random:integer(0),random:integer(-5)) (: Errors out :) random:seeded-integer(31,1,0) (: Errors out :) random:seeded-integer(31,1,-5) Here is the error information from the last command above. Error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.9 Java: Oracle Corporation, 1.7.0_25 OS: Windows 7, amd64 Stack Trace: java.lang.IllegalArgumentException: n must be positive at java.util.Random.nextInt(Unknown Source) at org.basex.query.func.FNRandom$1.next(FNRandom.java:85) at org.basex.query.MainModule$1.next(MainModule.java:98) at org.basex.query.QueryContext.execute(QueryContext.java:598) at org.basex.query.QueryProcessor.execute(QueryProcessor.java:101) at org.basex.core.cmd.AQuery.query(AQuery.java:82) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:329) at org.basex.core.Command.execute(Command.java:94) at org.basex.gui.GUI.exec(GUI.java:417) at org.basex.gui.GUI.access$500(GUI.java:41) at org.basex.gui.GUI$8.run(GUI.java:361) Cheers, Amanda

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Why does BaseX create empty System-properties
by rune.engh＠fatax.no 19 Aug '14

19 Aug '14

Hi, we do not use a different proxy port. I traced the System.setProperty class. When executing new Context() I got the following: setProperty('http.proxyHost','') setProperty('http.proxyPort','80') setProperty('https.proxyHost','') setProperty('https.proxyPort','80') setProperty('user.timezone','Europe/Oslo') +++ I also traced the Context class and verified that it was part of BaseX80-20140814.235204.jar Best Rune

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Re: [basex-talk] BaseX-Talk Digest, Vol 56, Issue 35
by Amanda Galtman 19 Aug '14

19 Aug '14

That was fast. Thanks, Dirk! Your logic sounds good to me. Cheers, Amanda > Date: Mon, 18 Aug 2014 17:10:28 +0200 > From: Dirk Kirsten <dk(a)basex.org> > To: basex-talk(a)mailman.uni-konstanz.de > Subject: Re: [basex-talk] random:integer vs. random:seeded-integer > Message-ID: <53F21764.4030106(a)basex.org> > Content-Type: text/plain; charset=ISO-8859-1 > > Hello Amanda, > > I agree, this behaviour is inconsistent. I am not quite sure what is the best > way to go here. Raising no error and simply returning 0 (as it is currently done > for random:integer() if max is out of range) seems pretty dangerous to me, > considering that randomness is often used for security and an unexpected 0 > might be hazardous. > Raising a Java error is maybe not the most elegant thing, maybe an XQuery > error would be more elegant (like FOAR0001, see > https://docs.basex.org/wiki/XQuery_Errors). > > I created a small pull request, which also throws an error for > random:integer() if max is out of range, see > https://github.com/BaseXdb/basex/pull/985. > > Cheers, > Dirk > > On 18/08/14 15:56, Amanda Galtman wrote: > > Hi, > > > > Is it intentional that random:integer lets you use zero or a negative value > for $max, but random:seeded-integer errors out in those cases? I know > these are edge cases. I'm only flagging them because of the inconsistency > between the two similar functions. > > > > (: Returns (0,0). :) > > (random:integer(0),random:integer(-5)) > > > > (: Errors out :) > > random:seeded-integer(31,1,0) > > > > (: Errors out :) > > random:seeded-integer(31,1,-5) > > > > > > Here is the error information from the last command above. > > > > Error: > > Improper use? Potential bug? Your feedback is welcome: > > Contact: basex-talk(a)mailman.uni-konstanz.de > > Version: BaseX 7.9 > > Java: Oracle Corporation, 1.7.0_25 > > OS: Windows 7, amd64 > > Stack Trace: > > java.lang.IllegalArgumentException: n must be positive > > at java.util.Random.nextInt(Unknown Source) > > at org.basex.query.func.FNRandom$1.next(FNRandom.java:85) > > at org.basex.query.MainModule$1.next(MainModule.java:98) > > at org.basex.query.QueryContext.execute(QueryContext.java:598) > > at > org.basex.query.QueryProcessor.execute(QueryProcessor.java:101) > > at org.basex.core.cmd.AQuery.query(AQuery.java:82) > > at org.basex.core.cmd.XQuery.run(XQuery.java:22) > > at org.basex.core.Command.run(Command.java:329) > > at org.basex.core.Command.execute(Command.java:94) > > at org.basex.gui.GUI.exec(GUI.java:417) > > at org.basex.gui.GUI.access$500(GUI.java:41) > > at org.basex.gui.GUI$8.run(GUI.java:361) > > > > > > Cheers, > > Amanda > > > > -- > Dirk Kirsten, BaseX GmbH, http://basex.org > |-- Firmensitz: Blarerstrasse 56, 78462 Konstanz > |-- Registergericht Freiburg, HRB: 708285, Gesch?ftsf?hrer: > | Dr. Christian Gr?n, Dr. Alexander Holupirek, Michael Seiferle > `-- Phone: 0049 7531 28 28 676, Fax: 0049 7531 20 05 22

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BaseX-Talk August 2014