[basex-talk] Using the same database in many BaseX instances
Hello, as discussed here few monthes ago, I do this : Install many instances (8) of BaseX on the same computer Start one instance, here called "main-instance" Create a database "library" , and load a filesystem directory into "library" Stop main-instance For each "other-instance", create a sym-link to main-instance/data/library Start "other-instances" On each instance, create 2 new databases "input" and "output", load a file in "input", process it and store result in "output". The process queries a lot "library", but never modifies "library". Then export "output" and drop databases "input" and "output". I have about 100 files to process; and I distribute them on the various instances I had a first test environment, with only 4 isntances, and everything was working perfectly. Now, I'm working on target environment, a bigger computer with 8 instances. Process fails, at least one time per instance, so between 8 and 12 times on 100 process. The exception is java.lang.NullPointerException at org.basex.data.DiskData.write(DiskData.java:136) at org.basex.data.DiskData.close(DiskData.java:151) at org.basex.core.Datas.unpin(Datas.java:54) at org.basex.core.cmd.Close.close(Close.java:45) at org.basex.query.QueryResources.close(QueryResources.java:110) at org.basex.query.QueryContext.close(QueryContext.java:596) at org.basex.query.QueryProcessor.close(QueryProcessor.java:251) at org.basex.core.cmd.AQuery.query(AQuery.java:124) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:398) at org.basex.core.Command.execute(Command.java:100) at org.basex.server.ClientListener.run(ClientListener.java:136) If I change the sym-links by a true copy (cp -r main/data/library other/data/), it now works correctly, but the copy takes a long time (database is about 30gb), and it consumes disk space. The computer I use has many available cores, and many RAM to use, so I'd love to add other instance, many 16 more to reach 24 isntances, but if database grow, I'm going to have disk-space troubles... 1 - is it legal to share a database (and files) between many instances as far as database is access read-only ? 2 - is there a way to configure a database to be read-only ? 3 - why symbolic links were perfectly usable with 4 instances, and do not with 8 instances ? (Hum I have to try symlinks with only 4 instances on the new computer...) 4 - are there other specific things to check to do what I need ? Best regards, Christophe
[basex-talk] Executing xq file from client fails
Hello, while running a .xq file on a database generates this error. The error is database-content relative ; with some data I have the error, with other data, I do not have the error. my lanceClient.sh is just /usr/local/basex4/bin/basexclient -nFR003-D0659 -p4984 -Ubasex -Pbasex $* Any hint to help me find where I have to search ? I can provide the .xq* files but for data, it wil be complicated : I have more than 7Gb in one collection (which never changes) ; other filewhich generates the error is 1.8Mb and can be provided, if needed. Best regards, Christophe $ ./lanceClient4.sh -d -bp-repertoire-output=/home/efladm/webbuint/uaur/om-work/orders/ /home/efladm/webbuint/uaur/om-work/xquery/create-orders-formulaires.xq org.basex.core.BaseXException: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 8.2.3 Java: Oracle Corporation, 1.8.0_51 OS: Linux, amd64 Stack Trace: java.lang.NullPointerException at org.basex.api.client.ClientSession.receive(ClientSession.java:193) at org.basex.api.client.ClientSession.execute(ClientSession.java:162) at org.basex.api.client.ClientSession.execute(ClientSession.java:167) at org.basex.api.client.Session.execute(Session.java:36) at org.basex.core.CLI.execute(CLI.java:103) at org.basex.BaseX.(BaseX.java:121) at org.basex.BaseXClient.(BaseXClient.java:40) at org.basex.BaseXClient.main(BaseXClient.java:27) Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 8.2.3 Java: Oracle Corporation, 1.8.0_51 OS: Linux, amd64 Stack Trace: java.lang.NullPointerException
Re: [basex-talk] BaseX request from Saxon XSL transformation
Thanks, I was reading the same articles... It was just to check if something already exists... Best regards, Christophe Le 2015-11-18 11:35, Dirk Kirsten a écrit : > Hello Christophe, > > I've never done this, but I'd say that extension functions are the way to go. > If I read the saxon documentation correctly > (http://www.saxonica.com/html/documentation/extensibility/functions/), you > can use it to call Java functions from within XSLT. As BaseX is written in > Java you should be able to put the BaseX jar file into the library path and > query BaseX using Java. Many Java Examples of how to query BaseX can be found > at http://docs.basex.org/wiki/Java_Examples > > Cheers > Dirk > > On 11/18/2015 09:18 AM, cmarch...@oxiane.com wrote: > >> Hello, >> >> I have to query a BaseX database from a XSL transformation. Does someone has >> ever done this ? I have no idea where to look in... >> >> I use SaxonEE, so I can write an extension function, if needed... >> >> Best regards, >> >> Christophe > > -- > Dirk Kirsten, BaseX GmbH, http://basexgmbh.de > |-- Firmensitz: Blarerstrasse 56, 78462 Konstanz > |-- Registergericht Freiburg, HRB: 708285, Geschäftsführer: > | Dr. Christian Grün, Dr. Alexander Holupirek, Michael Seiferle > `-- Phone: 0049 7531 28 28 676, Fax: 0049 7531 20 05 22
[basex-talk] BaseX request from Saxon XSL transformation
Hello, I have to query a BaseX database from a XSL transformation. Does someone has ever done this ? I have no idea where to look in... I use SaxonEE, so I can write an extension function, if needed... Best regards, Christophe
Re: [basex-talk] size on collection in the time (Marc)
I confirm the problem : on another database (same data, same script.xbs, different server), we have exactly the same problem : the database grows each time the script is run. I'm going to prepare a test-case with small public data tonight. Best regards, Christophe Hello Dirk, We use a BaseX script (.xbs) with a list of REPLACE. We try to investigate this point if this is reproducable or not. If I find this problem again, I take a copy of the collection before to delete her. Thank you for answer. Marc Le 03/09/2015 09:52, Dirk Kirsten a ?crit : > Hello Marc, > > sure, a replace should lead to a true replace, i.e. the old data will be > dropped. So this sounds like a bug, but it is difficult to replicate > from what you describe. > > Do you think it would be possible to make the issue reproducable, maybe > also with a smaller data set? Also, how exactly do you add documents or > do you also do any queries and maybe other updating queries? > > Cheers > Dirk > > On 09/02/2015 05:36 PM, Marc wrote: > >> Hi, >> I have a remark about the size of the files of a collection. >> We do a lot of updates (REPLACE) with an attributes index but without >> a text index. >> I see that the size of the files grows up in the time we arrive until >> 30Go until the limit of the filessytems quota. >> When I drop the collection and recreate it from the last version of >> the files the size was only 6Go. >> >> We will redo the test with the time, but I just want to know if the >> program clears the disk use when he does a REPLACE? >> >> Marc -- Message: 4 Date: Thu, 3 Sep 2015 10:01:05 +0200 From: Marc To: Dirk Kirsten Cc: BaseX Subject: Re: [basex-talk] (no subject) Message-ID: <55e7fe41.5080...@free.fr> Content-Type: text/plain; charset=iso-8859-15; format=flowed I forgot to give this precision, we use the 7.9 version on this server. Marc Le 01/01/1970 01:00, a ?crit : > Hello Dirk, > We use a BaseX script (.xbs) with a list of REPLACE. > We try to investigate this point if this is reproducable or not. > If I find this problem again, I take a copy of the collection before to > delete her. > > Thank you for answer. > > Marc > Le 03/09/2015 09:52, Dirk Kirsten a ?crit : Hello Marc, > > sure, a replace should lead to a true replace, i.e. the old data will be > dropped. So this sounds like a bug, but it is difficult to replicate > from what you describe. > > Do you think it would be possible to make the issue reproducable, maybe > also with a smaller data set? Also, how exactly do you add documents or > do you also do any queries and maybe other updating queries? > > Cheers > Dirk > > On 09/02/2015 05:36 PM, Marc wrote: Hi, > I have a remark about the size of the files of a collection. > We do a lot of updates (REPLACE) with an attributes index but without > a text index. > I see that the size of the files grows up in the time we arrive until > 30Go until the limit of the filessytems quota. > When I drop the collection and recreate it from the last version of > the files the size was only 6Go. > > We will redo the test with the time, but I just want to know if the > program clears the disk use when he does a REPLACE? > > Marc End of BaseX-Talk Digest, Vol 69, Issue 5 *
Re: [basex-talk] Looks like... (Scoobbs)
Hi Scoobbs, you are perfectly right, the basex available on ubuntu repository is quite old. But, your mail smells (bad) ! Basex team is responsible on developing basex, and not on publishing packages for all OS, as explained by Dirk Kirsten. You can't fight again BaseX team if the actual packaging do not meet your requirements. BaseX distribute a package that can be fully installed on a complex environment in a very easy way - very easy. You just have to read the documentation to install BaseX on your Ubuntu server. For me, to install 8.2.3, it took exactly 12 minutes to make basex to run perfectly. If you don't understand the documentation, and still have problems to install, all list-users will be happy to help you. You could also think to a bit of sponsoring, it could help to produce a package for Ubuntu, during august, which is vacation-time for the whole north hemisphere. Please, be a little more respectful of other's work. Best regards, Christophe - which is not part of BaseX team. Le 2015-08-21 08:35, basex-talk-requ...@mailman.uni-konstanz.de a écrit : > *?Looks like no one cares much for Ubuntu. I have version 7.7.2 installed, > through the Ubuntu Software Center. It was just a matter of cliking here > and there(actually no more than two clicks) and there I was. It even looks > like BaseX realy works!!!??Well, now that I have decided to try to use it, > there came a message saying a new version is available, namely > 8.2.3.Alright, I agreed I should update it. But then I was taken to a site > where something should be downloaded, in order for the installation to > happen. A 'file' or 'container' with a .jar extension should be it, I > thought. But, then again, there seemed to be no executable(or, easily > executable) file/module/app, whatever, was found. So I concluded I am not > as clever as most of the people building BaseX are. And, I ask:- Why is > there not an actually easy way to install the application? - Is it so damn > hard to build a thing like that? - Why is it so simple to implement > applications included in the cited Ubuntu Software Center, for simple > minded people like me, who can use effective tools like BaseX seems to be > but are not capable of understanding(much less to use, and retain in > memory, tens of cryptic commands???Anyway, my intent is actually to ask > someone(some good soul?) to update the Software Center so that one( I > suppose many...) can fast-and-dirtly(sorry... this is just a way to show my > frustration) use the tool.Thanks for any attention given to this request. > And, if someone does anything like what I asked above, please just tell me > where and what I must do. No need for replies nor attempts to teach me how > to do it(I inclusively think maybe it is not that difficult to do as it is > today, once one knows how to, but I am actually too old to learn new > tricks...).??Cordially, ?Scoobbs?(who just thought he could build a simple > database containing names, addresses, etc. about friends and > family...)??**?==?==???=?PS: > ** well, maybe, with some links to other variable attibutes of persons, > like, courses attended, graduation data etc. etc.)?*
Re: [basex-talk] basexserver start
It does ! I was looking at the to see if I could start the daemon with the required parameters... Thanks a lot ! Christophe Le 2015-08-20 20:18, Christian Grün a écrit : > Hi Christophe, > >> Does BaseXServer is a starter for another JVM ? > > It only does if you use the -S flag (Start as service). > > Does this help? > Christian
[basex-talk] basexserver start
Hello,
I want to monitor garbage collect on basex server.
So, I've modified basexserver as this :
BASEX_JVM="-Xmx6144m $BASEX_JVM
-Xloggc:/home/basex/logs/79/azul/gc.log.$(date -u +%Y-%m-%d-%H-%M) \
-verbose:gc \
-XX:+PrintGCDateStamps \
-XX:+PrintGCDetails \
-XX:+PrintGCApplicationStoppedTime
-javaagent:/usr/local/jHiccup/jHiccup.jar=-d,5000,-i,1000,-s,3,-l,/home/basex/logs/79/azul/hiccuplog,-c"
# Run code
java -cp "$CP" $BASEX_JVM "${vm_args[@]}" org.basex.BaseXServer
"${general_args[@]}"
The problem is I have only 2 seconds of monitoring.
Does BaseXServer is a starter for another JVM ?
How can I activate GC log on basex server ?
Thanks in advance,
Christophe
Re: [basex-talk] Resolving includes
Well, it's not easy ! In my case, we use the same prefix/uri mapping in all files, and modules only declares function. Humm... I hope ! I'm going to look at QueryProcessor, and see what I can do. Maybe, I won't cover the whole XQuery syntax, but just a part, and with limitations. If my maven plugin can warn and/or thro errors, it will be good enough. Thanks again, Christophe Le 2015-08-17 12:07, Christian Grün a écrit : >> I suppose, you have such a code that reads .xq file, analyses imports, read >> and process imports, to build the full query with all functions attached. >> >> But as finding a piece of code in a project you've never code on is a very >> long process, I thought you could help me to point out the main class in >> basex-core that does the job... > > I see. You could start with the QueryProcessor class [1 [1]]. However, I > believe it's a fairly complex job you are tackling. Even if you did it > manually, it would not always be clear how the merged representation > should look like. See the following modules: > > __ query.xq __ > > import module namespace mod1 = 'uri1' at 'mod1.xqm'; > declare namespace mod2 = 'c'; > declare variable $mod2:v := 'VAR1'; > ($mod1:v, $mod2:v) > > __ mod1.xqm __ > > module namespace ns = 'uri1'; > import module namespace mod2 = 'uri2' at 'mod2.xqm'; > declare variable $ns:v := $mod2:v; > > __ mod2.xqm __ > > module namespace ns = 'uri2'; > declare variable $ns:v := 'VAR2'; > > How do you think should the merged query look like? > > Christian > > [1] > https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/query/QueryProcessor.java > [1] > >> Best regards, >> >> Christophe >> >> Le 2015-08-17 11:43, Christian Grün a écrit : >> >> Hi Christophe, >> >> I want to produce a .XQ file that includes all the code contained in >> imported modules (via import module clause). My purpose is to produce a >> maven plugin to do this. >> >> I think such a code already exists in basex, and I would like to reuse it. >> >> I don't know anything about such a module. Where did you hear about it? >> >> Cheers, >> Christian Links: -- [1] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/query/QueryProcessor.java
Re: [basex-talk] Resolving includes
Well... I suppose, you have such a code that reads .xq file, analyses imports, read and process imports, to build the full query with all functions attached. But as finding a piece of code in a project you've never code on is a very long process, I thought you could help me to point out the main class in basex-core that does the job... Best regards, Christophe Le 2015-08-17 11:43, Christian Grün a écrit : > Hi Christophe, > >> I want to produce a .XQ file that includes all the code contained in >> imported modules (via import module clause). My purpose is to produce a >> maven plugin to do this. >> >> I think such a code already exists in basex, and I would like to reuse it. > > I don't know anything about such a module. Where did you hear about it? > > Cheers, > Christian
[basex-talk] Resolving includes
Hi, back to my questions on resolving modules includes. I want to produce a .XQ file that includes all the code contained in imported modules (via import module clause). My purpose is to produce a maven plugin to do this. I think such a code already exists in basex, and I would like to reuse it. Any entry-point will be much appreciated. Thanks in advance, Christophe
[basex-talk] [SOLVED] Re: BaseX 7.9 problem
SOLVED, it's just a read/write access problem on .basexperm. Sorry for the spam, Christophe Le 2015-07-23 10:07, cmarch...@oxiane.com a écrit : > Hello ! > > I have an exception throw on BaseX 7.9 > > I've just installed it on a linux box, in /usr/local/basex-79, owned by root, > chowned -R a+wr *, and run by another user. > > Here is the problem : > > $ /usr/local/basex/bin/basex -d > BaseX 7.9 [Standalone] > Try help to get more information. > >> SHOW USERS > Exception in thread "main" java.lang.NullPointerException > at org.basex.core.Context.perm(Context.java:220) > at org.basex.core.Command.execute(Command.java:84) > at org.basex.server.LocalSession.execute(LocalSession.java:121) > at org.basex.server.Session.execute(Session.java:37) > at org.basex.core.CLI.execute(CLI.java:106) > at org.basex.core.CLI.execute(CLI.java:90) > at org.basex.BaseX.console(BaseX.java:197) > at org.basex.BaseX.(BaseX.java:171) > at org.basex.BaseX.main(BaseX.java:42) > > Any help will be appreciated to identify the problem... > > Best regards, > > Christophe
[basex-talk] BaseX 7.9 problem
Hello ! I have an exception throw on BaseX 7.9 I've just installed it on a linux box, in /usr/local/basex-79, owned by root, chowned -R a+wr *, and run by another user. Here is the problem : $ /usr/local/basex/bin/basex -d BaseX 7.9 [Standalone] Try help to get more information. > SHOW USERS Exception in thread "main" java.lang.NullPointerException at org.basex.core.Context.perm(Context.java:220) at org.basex.core.Command.execute(Command.java:84) at org.basex.server.LocalSession.execute(LocalSession.java:121) at org.basex.server.Session.execute(Session.java:37) at org.basex.core.CLI.execute(CLI.java:106) at org.basex.core.CLI.execute(CLI.java:90) at org.basex.BaseX.console(BaseX.java:197) at org.basex.BaseX.(BaseX.java:171) at org.basex.BaseX.main(BaseX.java:42) Any help will be appreciated to identify the problem... Best regards, Christophe
Re: [basex-talk] basexclient and modules
Moving our xquery modules into server repository isn't a solution, as we could have many releases of the same module, used on various databases. So the solution will be to build a single .xq file with all the code in. I'm going to write a maven plugin to do this. Is there some basex code I could use to help me ? Entries will help ! Thanks in advance, Christophe Le 2015-07-22 15:08, Christian Grün a écrit : > Hi Christophe, > >> I can understand that compilation must be done on server-side - well, at >> least optimization - but client could parse the .xq file to check if there >> are imports, and either push them to server, or throw an error without >> accessing the server. > > Raising errors sounds dangerous to me: I remember at least two use > cases in which it was a deliberate choice to send XQuery code with > module imports to a BaseX server. Moreover, besides module imports, > there are numerous other expressions in a query module - such as the > doc() function - which may be interpretedly differently on a client > and on a server. > >> Is there an utility-tool which allows to generates a single script file from >> a .xq and included .xqm, that I could use before running basexclient ? > > Maybe you can simply move all your library modules into the > server-side BaseX repository. In this case, you won't need to specify > the module location anymore [1 [1]]. > > Hope this helps, > Christian > > [1] http://docs.basex.org/wiki/Repository#Accessing_Modules [1] > >> Best regards, >> >> Christophe Links: -- [1] http://docs.basex.org/wiki/Repository#Accessing_Modules
[basex-talk] basexclient and modules
Hello ! we would like to execute thru basexclient a xquery script that includes a xquery module : xquery encoding "utf-8"; declare namespace db="http://basex.org/modules/db";; import module namespace om-ll='http://els.eu/ns/efl/offresMetiers/CreateCIActu/lowLevel' at 'lowLevel.xqm'; With basexgui and basex CLI, no problem. But with basexclient, it seems included files are not send to server, so server can not resolve dependencies, and compile xquery. I can understand that compilation must be done on server-side - well, at least optimization - but client could parse the .xq file to check if there are imports, and either push them to server, or throw an error without accessing the server. Is this an issue ? Is there an utility-tool which allows to generates a single script file from a .xq and included .xqm, that I could use before running basexclient ? Best regards, Christophe
Re: [basex-talk] Full memory database
I think we could use the in-memory database to store read-only documents (our repository), a use disk-persisted database for the resulting documents. In term of requirements, I'd prefer Marc (added to dest list) to clearly explain what is expected, but I think attribute and node-name index should be enough. As this, we could avoid the update functionnalty on in-memory database. Best regards, Christopeh Le 2015-07-16 10:06, Christian Grün a écrit : > Hi Christophe, > >> is there a way to put all the databases in memory ? We have a 30Gb database, >> serving as repository for XInclude-like resolution, and I want to avoid disk >> access (I work with Marc Messeant...) >> >> Using special JVM, I can allocate many memory, and so want to work only in >> memory. Is this possible ? > > In the early days, BaseX has been a pure main-memory database. Today, > some main-memory features are still available. For example, you can > set MAINMEM to true and create a new database completely in main > memory. > > You can't open existing databases in memory, though. We are currently > looking for sponsors to realize this feature [1 [1]]. Feel free to give us > a note if you are interested? And what are your requirements: do you > also need updates, index structures, ...? > > Best, > Christian > > [1] https://github.com/BaseXdb/basex/issues/948 [1] Links: -- [1] https://github.com/BaseXdb/basex/issues/948
[basex-talk] Full memory database
Hello, is there a way to put all the databases in memory ? We have a 30Gb database, serving as repository for XInclude-like resolution, and I want to avoid disk access (I work with Marc Messeant...) Using special JVM, I can allocate many memory, and so want to work only in memory. Is this possible ? Best regards, Christophe
Re: [basex-talk] Function to throw an exception
That's exactly what I want !
Thanks a lot !
Christophe
Le 2015-06-09 10:58, Christian Grün a écrit :
> Hi Christophe,
>
>> I do not want to avoid the updates, but really want to throw an error.
>
> I'm not sure how to interpret your statement.. Do you want to execute
> the updates AND throw an error?
>
> If you throw an error, your updates won't be executed, so this may
> already be what you need. See the following example..
>
> let $data :=
> return if($data/*) then (
> insert node $data into db:open('db')/xml
> ) else (
> error((), 'Root has no child elements!')
> )
>
> Best,
> Christian
[basex-talk] Function to throw an exception
Hello, Before doing some updates, I want to check many things. If those checks fail, I want to throw an error, to allow the calling program be notified of the error. I do not want to avoid the updates, but really want to throw an error. Is there such a function ? Christophe
[basex-talk] Trigger to apply statements on technical events ?
Hello ! I've had this problem : I've forgotten a db:optimize(...) after a delete nodes operation. The following xquery has been 60 times slower than before. Is there a way to detect an update operation, and a way to know on which database the update occurs, to run automatically a db:optimize(...) each time a update xquery is run ? Christophe
[basex-talk] java.io.StreamClosed ignorable ?
Hello ! I have some java.io.IOException - Stream closed while performing updating XQueries. Thez are logged in basexgui java console, but in GUI, xquery is not interrupted, no error happens. Are these exceptions ignorables ? i.e. if process in GUI is not interrupted, is a fallback run and the log only informative ? Here is a partial stack-trace... BaseX 7.9 is used Best regards, Christophe java.io.IOException: Stream Closed at java.io.RandomAccessFile.seek(Native Method) at org.basex.io.random.TableDiskAccess.readBlock(TableDiskAccess.java:570) at org.basex.io.random.TableDiskAccess.readPage(TableDiskAccess.java:535) at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:514) at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:194) at org.basex.data.Data.kind(Data.java:284) at org.basex.query.value.node.DBNode.(DBNode.java:53) at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:65) at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:19) at org.basex.query.value.seq.Seq.toString(Seq.java:145) at org.basex.query.value.seq.Seq.toString(Seq.java:133) at org.basex.util.TokenBuilder.addExt(TokenBuilder.java:348) at org.basex.util.TokenBuilder.addSep(TokenBuilder.java:311) at org.basex.query.expr.Arr.toString(Arr.java:120) at org.basex.query.func.StaticFuncCall.toString(StaticFuncCall.java:140) at java.lang.String.valueOf(String.java:2847) at java.lang.StringBuilder.append(StringBuilder.java:128) at org.basex.query.gflwor.For.toString(For.java:126) at java.lang.String.valueOf(String.java:2847) at java.lang.StringBuilder.append(StringBuilder.java:128) at org.basex.query.gflwor.GFLWOR.toString(GFLWOR.java:669) at org.basex.util.TokenBuilder.addExt(TokenBuilder.java:348) at org.basex.util.TokenBuilder.addSep(TokenBuilder.java:311) at org.basex.query.expr.Arr.toString(Arr.java:120) at org.basex.query.expr.List.toString(List.java:150) at java.lang.String.valueOf(String.java:2847) at java.lang.StringBuilder.append(StringBuilder.java:128) at org.basex.query.gflwor.GFLWOR.toString(GFLWOR.java:670) at org.basex.util.TokenBuilder.addExt(TokenBuilder.java:348) at org.basex.util.TokenBuilder.addSep(TokenBuilder.java:311) at org.basex.query.expr.Arr.toString(Arr.java:120) at org.basex.query.expr.List.toString(List.java:150) at org.basex.query.MainModule.toString(MainModule.java:122) at java.lang.String.valueOf(String.java:2847) at java.lang.StringBuilder.append(StringBuilder.java:128) at org.basex.query.QueryInfo.usedDecls(QueryInfo.java:186) at org.basex.query.QueryInfo.toString(QueryInfo.java:137) at org.basex.query.QueryInfo.toString(QueryInfo.java:97) at org.basex.core.cmd.AQuery.query(AQuery.java:111) 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)
[basex-talk] BaseX trace() output
in basexGui, running trace((),'foo') displays this in Info panel : Evaluating: - fooempty-sequence() Query: trace((),'foo') Result: - Hit(s): 0 Items - Updated: 0 Items - Printed: 0 Bytes - Read Locking: none - Write Locking: none Timing: - Parsing: 0.75 ms - Compiling: 0.05 ms - Evaluating: 0.35 ms - Printing: 0.27 ms - Total Time: 1.43 ms Query plan: There is no output, but in the query plan. Is this what is expected ? Le 2015-04-30 12:00, basex-talk-requ...@mailman.uni-konstanz.de a écrit : > Send BaseX-Talk mailing list submissions to > basex-talk@mailman.uni-konstanz.de > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk [1] > or, via email, send a message with subject or body 'help' to > basex-talk-requ...@mailman.uni-konstanz.de > > You can reach the person managing the list at > basex-talk-ow...@mailman.uni-konstanz.de > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of BaseX-Talk digest..." > > Today's Topics: > > 1. Re: Database files across multiple directories > (julia.jacob...@arcor.de) > 2. Re: Database files across multiple directories (Christian Gr?n) > 3. Re: Where are the debugging infos emit by trace(...) > (Christian Gr?n) > 4. Re: Database files across multiple directories (Goetz Heller) > 5. Running commands on BaseX on Tomcat (Kristian Kankainen) > 6. Re: Running commands on BaseX on Tomcat (Christian Gr?n) > > -- > > Message: 1 > Date: Wed, 29 Apr 2015 17:59:53 +0200 (CEST) > From: julia.jacob...@arcor.de > To: basex-talk@mailman.uni-konstanz.de > Cc: hel...@hellerim.de > Subject: Re: [basex-talk] Database files across multiple directories > Message-ID: > <1680192231.162639.1430323193071.javamail.ngm...@webmail22.arcor-online.net> > > Content-Type: text/plain; charset=ISO-8859-1 > > Thanks a lot for your answers so far. What I was thinking of as a use case > are many small xml-Documents in many different (sub)directories that should > be used together as one database, like for example one xml file for one > address and address arranged into folders according to towns so one would > have 9 xml files in a folder named "berlin" and 5 ones in another folder > named "munich" and so on. > Does BaseX create an index of these files so that I could for example query > for example for persons with the same name? If I want to change something in > these files, will the changes be also made in the xml documents? > > Kind regards, > Julia > > -- > > Message: 2 > Date: Wed, 29 Apr 2015 18:14:56 +0200 > From: Christian Gr?n > To: julia.jacob...@arcor.de > Cc: Goetz Heller , BaseX > > Subject: Re: [basex-talk] Database files across multiple directories > Message-ID: > > Content-Type: text/plain; charset=UTF-8 > > Hi Julia, > >> Does BaseX create an index of these files so that I could for example query >> for example > for persons with the same name? > > BaseX will create a database from these files. This can e.g. be done > by starting the GUI, choosing "Database" ? "New?", selecting your XML > directory, and pressing OK. > > All documents will then be stored, and the textual contents will be > indexed. Next, you can use XQuery, which is not only a query language, > but a powerful programming language, to do all kinds of things with > the data. See e.g. [1 [2]] or [2 [3]] for some examples. You probably don't > want to do that by yourself, but XQuery can be used to write full web > applications. > >> If I want to change something in these files, will the changes be also made >> in the xml documents? > > Currently, there is no automatic synchronisation between databases and > local file directories, so you'll either have to export the database > after updates, or create a new database after files have been changed. > > Cheers, > Christian > > [1] http://docs.basex.org/wiki/XQuery_3.0 [4] > [2] http://www.w3schools.com/xquery/ [3] > > If I want to change something in these files, will the changes be > also made in the xml documents? > >> Kind regards, >> Julia > > -- > > Message: 3 > Date: Wed, 29 Apr 2015 18:25:21 +0200 > From: Christian Gr?n > To: cmarchand > Cc: BaseX > Subject: Re: [basex-talk] Where are the debugging infos emit by > trace(...) > Message-ID: > > Content-Type: text/plain; charset=UTF-8 > > Hi Christophe, > >> I'm l
[basex-talk] Where are the debugging infos emit by trace(...)
!hi ! I'm looking for the trace() output in gui and server mode... I've checked System.out / System.err, but nothing. Any idea ? Christophe
[basex-talk] Large memory basex instances
Hi ! in J2EE servers, it is a performance fault to make instances with more than 2Gb Xmx, because of the GC pauses. In baseX, uge xqueries on uge databases need a lot of memory. But looking at memory consumption (Runtime.freeMemory), it appears that a lot of GC are run during a query. GC pauses are time-lost, and I'm looking for a way to accelerate queries. Does someone has experience on giving large quantities of memory (above 8Gb) to a basex server ? Does someone has experience on using no-GC-pauses JVM (like Azul Zing) with baseX ? Best regards, Christophe
[basex-talk] Strange bug ? testing the db:path of a non-stored database node
Hello, I have this error. According to http://docs.basex.org/wiki/Database_Module#Database_Nodes, I thought modify() was transforming a node to a database node It seems it does not initialize a document name... Best regards, Christophe Error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 8.1 Java: Oracle Corporation, 1.8.0_31 OS: Windows 7, amd64 Stack Trace: java.lang.NullPointerException at org.basex.query.value.item.Str.get(Str.java:49) at org.basex.query.func.db.DbPath.item(DbPath.java:23) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:64) at org.basex.query.QueryContext.value(QueryContext.java:415) at org.basex.query.up.expr.Transform.value(Transform.java:91) at org.basex.query.up.expr.Transform.iter(Transform.java:59) at org.basex.query.up.expr.Transform.iter(Transform.java:25) at org.basex.query.MainModule.iter(MainModule.java:114) at org.basex.query.QueryContext.iter(QueryContext.java:343) at org.basex.query.QueryContext.execute(QueryContext.java:605) at org.basex.query.QueryProcessor.execute(QueryProcessor.java:98) at org.basex.core.cmd.AQuery.query(AQuery.java:83) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:379) at org.basex.core.Command.execute(Command.java:95) at org.basex.gui.GUI.exec(GUI.java:466) at org.basex.gui.GUI.access$400(GUI.java:41) at org.basex.gui.GUI$7.run(GUI.java:410) Query: copy $c := modify () return db:path($c) Query plan:
