BaseX-Talk

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5252 discussions

EXPath File Module within xqueries in oxygen?
by Alex Muir 27 Nov '12

27 Nov '12

Hi, So having the oxygen integration setup now, the next question that comes up which I'm not finding an answer for is can one use the EXPath File Module within xqueries in oxygen? I'm googling around,, I gather only basex that has implemented it from the website. http://expath.org/modules/file/implems I see that though that oxygen has a method to import modules but not sure where to get the module if that's the case. http://www.oxygenxml.com/xml_editor/xquery_editor.html I suppose it's not that important for use in oxygen but thought I would ask.. Regards -- - Alex G. Muir Software Engineering Consultant Linkedin Profile : http://ca.linkedin.com/pub/alex-muir/36/ab7/125 Love African Kora Music? Take a moment to listen to Gambia's - Amadu Diabarte & Jali Bakary Konteh www.bafila.bandcamp.com Your support keeps Africa's griot tradition alive... Cheers!

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Re: [basex-talk] Database corruption
by Antoni Mylka 26 Nov '12

26 Nov '12

Hi Christian, Let's return with this discussion to the mailing list as I think this might be interesting for everybody. Summary: I had stability problems. In my tests, once BaseX reached certain size It would start throwing exceptions with stacktraces reaching deep into the low-level classes that shuffle the bits and bytes on disk. I now started a test run of our system with PARALLEL=1 and UPDINDEX=false. The system has been running without any exceptions for 17 hours. Starting with an empty data there have been almost 200K queries and commands. This is a record. Now, what exactly are the consequences of UPDINDEX being false. Can I do queries? What kind of queries I can't do? What kind of queries will be slower? Will the database rebuild the index automatically? When? What is the command to trigger an index rebuild manually. Is the index rebuild kind of a "stop-the-world" operation, so that BaseX will become unresponsive or will it be done in parallel. What are the benefits of the indices, can I live without them? -- Antoni Myłka Software Engineer basis06 AG, Birkenweg 61, CH-3013 Bern - Fon +41 31 311 32 22 http://www.basis06.ch - source of smart business ----- Ursprüngliche Mail ----- Von: "Christian Grün" <christian.gruen(a)gmail.com> An: "Antoni Mylka" <amy(a)basis06.ch> Gesendet: Dienstag, 20. November 2012 16:46:30 Betreff: Re: [basex-talk] Database corruption Hi Antoni, > I'll also try to run an experiment without UPDINDEX. yes, this would be interesting. I did some more testing with the given queries, but couldn’t encounter something noteworthy so far.. Thanks, Christian

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HTTP module - authorization
by Hans-Juergen Rennau 23 Nov '12

23 Nov '12

Hello, I have a question about the HTTP module and authorization. Is digest authorization supported, or is it only possible to provide basic access authorization? Thank you, Hans-Juergen

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Re: [basex-talk] Unable to integrate with oxygen to run xquery
by Charles Foster 23 Nov '12

23 Nov '12

Hi Alex, Have you tried using BaseX XQJ 1.2.3 [1]? I suggest downloading the zip file on the xqj.net site and giving Oxygen all of the jars contained within the zip. The XQDataSource class you will need to use within Oxygen is "net.xqj.basex.BaseXXQDataSource", if you have further problems, please let me know. Regards, Charles [1] http://xqj.net/basex > Hi Michael, > > I'm seeing that I was doing things in a way that probably was not > recommended. > > I had: > > 1. installed jetty sudo yum install jetty > 2. downloaded the war file to /usr/share/jetty/webapps/BaseX73.war > 3. Create context xml here /usr/share/jetty/contexts/contexts/BaseX73.xml > 4. started the server cd /usr/share/jetty/ and java -jar start.jar > > This gave me access through at 8080 and I've been loading data using curl > calls without issue. I had been using the jar file standalone and so I > thought using the war file in a similar way would be fine. I suppose it > might but I could not connect using oxygen this way. > > I've since changed my approach to using the complete basex distribution > although I've run into a few other issues. I suppose the first was that > oxygen was asking for woodstox-core jars so I downloaded those and added > them to the lib directory. Secondly the complete distribution doesn't come > with the basex-xqj-0.9.2.jar so I've put that into the lib with the other > jars, it makes me wonder though if the instructions "Add the following JAR > files above with the *Add* Button: xqj-api-1.0.jar, xqj2-0.0.1.jar and > basex-xqj-0.9.2.jar (the version names of the JAR file may differ) " are > accurate give only the first 2 files are included in the zip. > > Finally now I'm getting an error "Description: Could not initialize class > net.xqj.basex.bin.m" I'm not sure how to resolve this one although I > assume I'm missing something. > > I've started the server using the gui, loaded files into a db and used the > gui server administration interface to start the server. > > Thoughts? > > Thanks Much > Alex

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try catch with return?
by bryan rasmussen 23 Nov '12

23 Nov '12

Hi, I'm getting the following: Error: Stopped at line 1, column 73: [XPST0003] Expecting 'where', 'order' or 'return' expression. Query: for $doc in db:open('dk') let $dates := $doc//DATO for $date in $dates try{ return <gooddate>{xs:date($date)}</gooddate> } catch *{ return <baddate docid="{$doc/*/@ID}">{$date}</baddate>} I wanted to basically to return all DATO elements with document ids that were not valid xs dates, and figured a try catch with returns in it were the best option. Is that not allowed or have I made some basic error? If it's not allowed how would you handle it? Note it is not really realistic to do something like catch these errors in validation since they've already been past the validation process, first I'd have to do a lot of work to write a schema that handled the document structure since there are a lot of mixed content possibilities (or add new validation language etc.), second I'd have to have it in my validation pipeline and the several hundred thousand large documents would have to be run through the pipeline again just to find a few thousand malformed dates that anyway are currently not used for anything important (but of course if we make them valid date then they can start being used for stuff) at any rate handling it with XQuery seems the best solution. Thanks, Bryan Rasmussen

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FLWOR window clause
by Hans-Juergen Rennau 23 Nov '12

23 Nov '12

Hello, are there already any plans for implementing the XQuery 3.0 feature "window clause in FLWOR expressions"? It seems to me so interesting as it allows the creation and evaluation of "self describing item streams", that is, streams of XDM items with interspersed control items which define and annotate sub units (windows) of the stream total, thus effectively translate the stream of items into a stream of larger units, in analogy to XML tags which translate a stream of characters into a stream of information items... Thank you, Hans-Juergen

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ASSALAMUALAIKUM
by Surina Binti Abdul Majid 22 Nov '12

22 Nov '12

Salam, Saya Surina Binti Abdul Majid dan sekarang bekerja di London sebagai Pegawai Pemasaran (Marketing Officer) di sebuah syarikat pemprosesan batu permata di London.Untuk pengetahuan anda terdapat peluang perniagaan yang hendak saya perkenalkan dan keuntungannya akan diperolehi daripada kerjasama dan bantuan segera yang saya perlukan daripada anda. Saya menghubungi anda kerana saya tidak mahu lepaskan peluang yang ada di dalam syarikat kami buat masa ini dan juga pada masa hadapan. Saya perlukan anda sebagai pembekal (supplier/agent) kepada syarikat kami supaya kita boleh sama-sama merebut peluang perniagaan yang terbuka sekarang ini. Syarikat kami memerlukan produk bernama (TATALITE SUPPLE). Produk Tatalite Supple ini merupakan bahan cecair kimia saintifik yang baru dan merupakan pelincir yang digunakan di dalam makmal permata (gemological laboratory) untuk rawatan penulenan berlian (purification of diamonds clarity treatment). Pelincir yang digunakan semasa rawatan tersebut akan menembusi jauh ke dalam berlian dan semua kotoran hitam kecil di dalam berlian dan batu permata akan meruap keluar. Pembekal utama produk ini berada di Malaysia tetapi pembekal produk terus kepada syarikat kami telah mengalami kemalangan dan meninggal dunia di UK, beliau merupakan Pengurus Pemasaran (Marketing Manager) dan semenjak kemalangan tersebut, monopoli perniagaan telah terputus. Sesiapapun boleh membekalkan produk dan bergabung untuk membuat perkongsian dengan syarikat kami dan ini adalah sebabnya saya menulis email kepada anda untuk meminta bantuan, di mana saya memerlukan anda untuk bertindak sebagai ejen perantara yang akan mengisi kekosongan di antara pembekal utama dan pembeli iaitu syarikat kami. Ini adalah perniagaan yang besar dan akan memberikan dividen yang baik kepada kita berdua. Saya hanya memerlukan kerjasama anda untuk menjadikan perniagaan ini berjaya. Maklumat lanjut akan saya berikan sekiranya anda sanggup menjadi ejen yang membekalkan produk ini kepada syarikat kami. Pertama, saya akan mendapatkan satu perjanjian bekalan kontrak untuk anda sebagai pembekal kepada syarikat di mana saya bekerja. Berdasarkan peratusan, harga belian produk daripada syarikat adalah 4,000.00 USD per karton, manakala di Malaysia harga jualan produk adalah 2,100 USD. Jumlah yang diperlukan oleh syarikat adalah tidak kurang daripada 200 karton. Tujuan mengapa saya mahu anda untuk menjadi ejen kami adalah untuk menjadi pautan yang menghubungkan penjual tempatan di Malaysia secara langsung kepada syarikat yang membeli. Maka margin keuntungan akan dikongsi oleh kita berdua 60% untuk anda manakala 40% untuk saya. Bantuan utama yang diperlukan daripada anda adalah supaya anda memberitahu kepada pengurus saya bahawa anda boleh membekalkan produk ini kepada syarikat kami dan juga untuk mendalami butiran tentang harga dan cara bayaran. Kemudian, kami akan ambil langkah selanjutnya daripada situ. Hubungi saya setelah terima emel ini supaya saya boleh berikan nama dan butiran pembekal utama di Malaysia. Setelah menerima butiran pembekal utama ini, anda perlu menghubungi pembekal tersebut untuk bertanya samada, sekarang ada stok atau tidak untuk bekalan segera kepada kamu, sebelum saya maklumkan kepada Pengarah Syarikat (Company Director) kami tentang anda. Seterusnya Pengarah Syarikat akan hubungi anda dan membuat persediaan kepada Pengurus Pembelian (Purchasing Manager) terbang ke Malaysia. Purchasing Manager ini akan membeli produk daripada anda dan bayaran adalah secara tunai melalui bank di Malaysia. Harap boleh balas dengan segera. Sekian Surina

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Re: [basex-talk] Adding documents to database while space on diskdrive runs out
by pw＠themail.co.uk 22 Nov '12

22 Nov '12

I think that eXist-db takes the latter approach - the database becomes read-only when the disk is limited in space > > >---- Original Message ---- >From: christian.gruen(a)gmail.com >To: thomas.kaltofen(a)risc.uni-linz.ac.at >Subject: Re: [basex-talk] Adding documents to database while space on >diskdrive runs out >Date: Thu, 22 Nov 2012 19:08:01 +0100 > >>Dear Thomas, >> >>Im sorry that your data got corrupted. I agree that such a test >would >>be a desirable addition, Im afraid its often difficult to guess >how >>much space will be occupied by a specific update operation. We could >>generally disable update operations when the remaining space falls >>below a given limit, but once again such a limit would be strongly >>dependent on the used system and use cases. >> >>Rollbacks are on our long-term todo list (along with, or even >without >>MVCC), similar to incremental backups, but if memory gets low, they >>may as well lead to unexpected behavior. >> >>All the best, >>Christian >>_________________________________________ >> >>> I just had the problem that the disk space of the drive where a >BaseX database instance was stored ran out while adding a new >document to the database via the server interface. The result was a >half-finished document in the database resulting in >ArrayIndexOutOfBounds-exceptions when querying the database and >strange behavior of the GUI (views are not shown and even disabled). >Would it be possible to check for sufficient disk space before >writing to the database files? Moreover, it would be nice if the >failed transaction of adding the document while the space ran out >could be rolled back somehow to get the database back into a >consistent state. >>> >>> Thank you for your support! >>> >>> Best regards, >>> Thomas >>> _______________________________________________ >>> BaseX-Talk mailing list >>> BaseX-Talk(a)mailman.uni-konstanz.de >>> https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >>_______________________________________________ >>BaseX-Talk mailing list >>BaseX-Talk(a)mailman.uni-konstanz.de >>https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >>

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Unable to integrate with oxygen to run xquery
by Alex Muir 22 Nov '12

22 Nov '12

Hi, I've got basex set up using jetty and can query within the firefox browser to return data for example using the url http://localhost:8080/rest/DDEX?query=//MessageHeader however my equivalent oxygen xquery does not return data and rather continues to run not stopping I've recently downloaded the jars and configured the Data Source Drivers as per the http://docs.basex.org/wiki/Integrating_oXygen file:/mnt/xslt_volume/i4EnrichV7/analysis/resources/libs/basex-xqj-1.2.3.jar file:/mnt/xslt_volume/i4EnrichV7/analysis/resources/libs/xqj-api-1.0.jar file:/mnt/xslt_volume/i4EnrichV7/analysis/resources/libs/xqj2-0.1.0.jar In the basex connection which is enabled I've got the following settings port 8080 databaseName DDEX logLevel description loginTimeout 6000 serverName localhost user admin password admin I set up a trasformation scenario with BaseX transformer with the following xquery let $content := //MessageHeader return $content The scenario does not return any data Thoughts? Regards -- - Alex G. Muir Software Engineering Consultant Linkedin Profile : http://ca.linkedin.com/pub/alex-muir/36/ab7/125 Love African Kora Music? Take a moment to listen to Gambia's - Amadu Diabarte & Jali Bakary Konteh www.bafila.bandcamp.com Your support keeps Africa's griot tradition alive... Cheers!

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Adding documents to database while space on disk drive runs out
by Thomas Kaltofen 22 Nov '12

22 Nov '12

Hi, I just had the problem that the disk space of the drive where a BaseX database instance was stored ran out while adding a new document to the database via the server interface. The result was a half-finished document in the database resulting in ArrayIndexOutOfBounds-exceptions when querying the database and strange behavior of the GUI (views are not shown and even disabled). Would it be possible to check for sufficient disk space before writing to the database files? Moreover, it would be nice if the failed transaction of adding the document while the space ran out could be rolled back somehow to get the database back into a consistent state. Thank you for your support! Best regards, Thomas

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