BaseX-Talk January 2019

basex-talk@mailman.uni-konstanz.de

24 participants
36 discussions

BaseX query performance
by wd＠creativosdigitales.co 28 Jan '19

28 Jan '19

Hi, We have a BaseX database of 3.2 MB size with 146,036,090 nodes on 451,124 documents Executing a simple query that returns only 4 elements is taking 6 seconds to run. Here is the execution plan: Optimized Query: *:entity Query: entity Result: - Hit(s): 4 Items - Updated: 0 Items - Printed: 549 b - Read Locking: deterioroTest - Write Locking: (none) Timing: - Parsing: 0.22 ms - Compiling: 1.13 ms - Evaluating: 4785.05 ms - Printing: 28.17 ms - Total Time: 4814.58 ms Query plan: <QueryPlan compiled="true" updating="false"> <CachedPath type="element()+" size="4"> <IterStep axis="child" test="*:entity" type="element()*"/> </CachedPath> </QueryPlan> And this is path list obtained from BaseX GUI doc(): 451124x entity: 4x name: 4x, leaf text(): 4x, 4 distinct strings, leaf active: 4x, leaf text(): 4x, string, leaf entityid: 4x, leaf text(): 4x, 4 distinct integers [1, 90086898], leaf dateadd: 3x, leaf text(): 3x, 3 distinct integers [1.536184706046E12, 1.538624904652E12], leaf description: 1x, leaf text(): 1x, string, leaf user: 3x password: 3x, leaf text(): 3x, 3 distinct strings, leaf role: 3x, leaf text(): 3x, 3 distinct integers [1, 3], leaf name: 3x, leaf text(): 3x, 3 distinct strings, leaf active: 3x, leaf text(): 3x, string, leaf entityid: 3x, leaf text(): 3x, 2 distinct integers [1, 90086898], leaf userid: 3x, leaf text(): 3x, 3 distinct integers [1, 1152438998], leaf email: 3x, leaf text(): 3x, 3 distinct strings, leaf dateadd: 2x, leaf text(): 2x, 2 distinct integers [1.537475569294E12, 1.537993241561E12], leaf project: 35x dateadd: 35x, leaf text(): 35x, 35 distinct integers [1.536184761155E12, 1.543940735205E12], leaf name: 35x, leaf text(): 35x, 28 distinct strings, leaf entityid: 35x, leaf text(): 35x, 4 distinct integers [1, 90086898], leaf projectid: 35x, leaf text(): 35x, 29 distinct integers [1, 20181030], leaf userUpId: 35x, leaf text(): 35x, 2 distinct integers [1, 123], leaf priority: 1x, leaf text(): 1x, string, leaf collection: 2x AA: 2x, leaf text(): 2x, double [0.021, 0.021], leaf BB: 2x, leaf text(): 2x, double [0.1268, 0.1268], leaf CC: 2x, leaf text(): 2x, double [0.2257, 0.2257], leaf A: 2x, leaf text(): 2x, double [0.0388, 0.0388], leaf B: 2x, leaf text(): 2x, double [0.1416, 0.1416], leaf garantianoadmisible: 2x, leaf text(): 2x, double [0.6, 0.6], leaf singarantia: 2x, leaf text(): 2x, 2 distinct doubles [0.65, 0.75], leaf entityid: 2x, leaf text(): 2x, 2 distinct integers [2, 90086898], leaf colateralfinanciero: 2x, leaf text(): 2x, double [0.12, 0.12], leaf info_asset: 181x entitytid: 181x, leaf text(): 181x, 4 distinct integers [1, 90086898], leaf total: 33x, leaf text(): 33x, 12 distinct integers [13856, 14381], leaf working: 33x, leaf text(): 33x, 2 distinct strings, leaf projectid: 181x, leaf text(): 181x, 29 distinct integers [1, 20181030], leaf status: 181x, leaf text(): 181x, 3 distinct strings, leaf asset: 450811x assetid: 450811x, leaf text(): 450811x, integers [42521, 296380], leaf lastdatepay: 450811x, leaf text(): 450811x, strings, leaf ammount: 450811x, leaf text(): 450811x, string, leaf term: 450811x, leaf text(): 450811x, 93 distinct integers [1, 180], leaf balance: 450811x, leaf text(): 450811x, doubles [1, 120901239], leaf rate: 450811x, leaf text(): 450811x, 69 distinct doubles [0.3346062573, 1.6], leaf payment: 450811x, leaf text(): 450811x, doubles [11760, 7043536], leaf pendingpayments: 450811x, leaf text(): 450811x, doubles [0, 146.41], leaf pagare: 450811x, leaf text(): 450811x, integers [42521, 296380], leaf calificacion: 450811x, leaf text(): 450811x, 5 distinct strings, leaf plazo: 450811x, leaf text(): 450811x, 93 distinct integers [1, 180], leaf linea: 450811x, leaf text(): 450811x, 12 distinct strings, leaf destino: 450811x, leaf text(): 450811x, 51 distinct strings, leaf tasacolocacion: 450811x, leaf text(): 450811x, 69 distinct doubles [0.3346062573, 1.6], leaf capitalinicial: 450811x, leaf text(): 450811x, integers [17347, 150000000], leaf saldocapital: 450811x, leaf text(): 450811x, doubles [1, 120901239], leaf anualidad: 450811x, leaf text(): 450811x, integers [11760, 7043536], leaf cedulasociado: 450811x, leaf text(): 450811x, strings, leaf codempresa: 464689x, leaf text(): 450811x, integers [0, 173767], leaf garantia: 450811x, leaf text(): 450811x, 7 distinct integers [1, 11], leaf nombre_de_la_garantia: 450811x, leaf text(): 450811x, 7 distinct strings, leaf diasmora: 450811x, leaf text(): 450811x, integers [0, 1280], leaf f_ultimop: 450811x, leaf text(): 450811x, strings, leaf nrocuotasfaltantesporcancelar: 450811x, leaf text(): 450811x, doubles [0, 146.41], leaf edad: 450811x, leaf text(): 450808x, 75 distinct doubles [18, 118], leaf Cobertura: 155142x, leaf text(): 155142x, 2 distinct integers [0, 1], leaf entityid: 450811x, leaf text(): 450811x, 4 distinct integers [1, 90086898], leaf projectid: 450811x, leaf text(): 450811x, 26 distinct integers [1, 201809], leaf diasmoracalculado: 450811x, leaf text(): 450811x, integers [-40, 2742], leaf simulation: 450811x payment: 7939701x number: 7939701x, leaf text(): 7939701x, integers [1, 655], leaf principal: 7939701x, leaf text(): 7939701x, doubles [-2334, 7019755.662381106], leaf interest: 7939701x, leaf text(): 7939701x, doubles [4.048068592674E-5, 1209057.2709579417], leaf newbalance: 7939701x, leaf text(): 7939701x, doubles [0, 1.1950670127095795E8], leaf total: 7939701x, leaf text(): 7939701x, doubles [0.0028131304069364, 7043536], leaf npv: 7939701x, leaf text(): 7939701x, doubles [0.00265466933451965, 7019849.776618443], leaf punishment: 502215x, leaf text(): 502215x, doubles [0, 3082100.44417925], leaf punishment: 450811x policyid: 450811x, leaf text(): 450811x, 20 distinct strings, leaf name: 450811x, leaf text(): 450811x, 18 distinct strings, leaf priority: 450811x, leaf text(): 450811x, 19 distinct integers [0, 65], leaf rate: 450811x, leaf text(): 450811x, 8 distinct doubles [0, 100], leaf formula: 450811x, leaf text(): 72339x, strings, leaf totalnpv: 450811x, leaf text(): 450811x, doubles [1, 1.2090123899999978E8], leaf totalpunishment: 450811x, leaf text(): 450811x, doubles [0, 9.421980520009069E7], leaf punish: 450811x, leaf text(): 450811x, doubles [-61.90886675214506, 3.097031737637267E7], leaf f_cargoprestamo: 295669x, leaf text(): 295669x, strings, leaf ESTADO: 70121x, leaf text(): 70121x, strings, leaf Rango_de_Mora: 295669x, leaf text(): 295669x, 8 distinct strings, leaf intcorriente: 295669x, leaf text(): 295669x, doubles [-93720, 4698722], leaf intcorrientenocontabilizado: 295669x, leaf text(): 295669x, integers [0, 4698106], leaf intmora: 295669x, leaf text(): 295669x, doubles [0, 84202], leaf intmoranocontabilizado: 295669x, leaf text(): 295669x, doubles [0, 2857125], leaf formapago: 295669x, leaf text(): 295669x, 2 distinct strings, leaf valorgarantia: 295669x, leaf text(): 295669x, integers [0, 419847500], leaf nrocuotascanceladas: 295669x, leaf text(): 295669x, doubles [0, 179.69], leaf salario: 295669x, leaf text(): 295669x, integers [0, 1152688304], leaf CATEGORIA: 268010x, leaf text(): 268010x, 3 distinct strings, leaf FECHA_DE_NACIMIENTO: 295669x, leaf text(): 295667x, strings, leaf Estado: 184022x, leaf text(): 184022x, 2 distinct strings, leaf _: 55836x, leaf policy: 88x policyid: 88x, leaf text(): 88x, 22 distinct strings, leaf rate: 88x, leaf text(): 88x, 8 distinct integers [0, 100], leaf name: 88x, leaf text(): 88x, 20 distinct strings, leaf formula: 88x, leaf text(): 88x, strings, leaf entityid: 88x, leaf text(): 88x, 4 distinct integers [1, 90086898], leaf priority: 88x, leaf text(): 88x, 21 distinct integers [10, 67], leaf Is there anything we could do to reduce the response time? This query is used in que UI of the application and the user is nagging about having to wait 6 seconds to open a Combo box. Thanks in advance for all the help, William David Velásquez Creativo de Software Creativos Digitales S.A.S. Calle 30A # 83 - 53 Local 1033 Tel: 322 1730 - 311 709 8421 Medellín, Colombia ¿Necesita Integrar Sistemas? Conozca nuestra solución de Integración no Invasiva: http://creativosdigitales.co <http://creativosdigitales.co/> ¿Preguntas sobre Facturación Electrónica? Visite: http://facturasyrespuestas.com <http://facturasyrespuestas.com/> Síganos en Twitter <https://twitter.com/FacYRespuestas> @FacyRespuestas

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BaseX 9.1.2: Maintenance Release
by Christian Grün 25 Jan '19

25 Jan '19

Hi all, A new BaseX maintenance release is available. Minor bugs have been fixed, and some performance tweaks have been added. In particular, access to large WebDAV directories should be faster now. As usual, you find the latest version on our homepage basex.org. Maven artifacts have been added, various other distributions will follow soon. Have fun everyone, Christian, BaseX Team

3 7

not() and != result
by Xavier-Laurent SALVADOR 25 Jan '19

25 Jan '19

Hi List, I'm seing a little problem I can't understand with a small 27M thesaurus database. I created all indexes. When using the '!=' operator to compare two lists, I get a quick and wrong result: ------- *Case 1:* let $a := /thesaurus/entry/synonym/term let $b := /thesaurus/entry/term return $a[. = $b] ---> First result: "raccourcir" ------- and ------- *Case 2:* let $a := /thesaurus/entry/synonym/term let $b := /thesaurus/entry/term return $a[. != $b] ---> First result: "raccourcir" ------ while ------ *Case 3:* count(//entry[term='raccourcir']) --> result: 1 ------- But when I use the "not()" function as usual: ------ *Case 4:* let $a := /thesaurus/entry/synonym/term let $b := /thesaurus/entry/term return $a[not(.=$b)] ------- It dies out of memory. Is there something I did not see ? tx Xavier-Laurent Salvador

3 4

many distinct namespaces
by Сергей Чесноков 24 Jan '19

24 Jan '19

Hi all, Is it possible to bypass the following restriction (I cannot change "ep_ins_med_q.xsd" (Central Bank xbrl scheme))?: BaseX 9.1 Command: CREATE DB bfo D:/portal/xbrl/CBR/final_1_3_1/Taxonomy_1_3_1/www.cbr.ru/xbrl/bfo/ Error: "D:/portal/xbrl/CBR/final_1_3_1/Taxonomy_1_3_1/www.cbr.ru/xbrl/bfo/rep/2018-03-31/ep/ep_ins_med_q.xsd""ep_ins_med_q.xsd" (Line 21): Too many distinct namespaces (limit: 256). Best regards, Sergei.

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XSD 1.1 - Element not found
by Hans-Juergen Rennau 22 Jan '19

22 Jan '19

Dear BaseX team, trying to use XSD 1.1, I encounter a problem. As indicated in the documentation, I added to the lib folder the jar files from the newest Xerxes distribution (Xerces-J-bin.2.12.0-xml-schema-1.1.zip, download from http://xerces.apache.org/mirrors.cgi#binary ). The problem: when using the schema attribute vc:minVersion="1.1", validation fails with the message: 1:41: cvc-elt.1.a: Cannot find the declaration of element 'Foo'. But the element is there, and the namespace matches the target namespace. When changing the attribute vc:minVersion="1.0", validation works, but, of course, cannot cope with 1.1 features. (The same applies to validation after removing the attribute.) I tried both - copying only the four jar files named in the documention, cupv10k-runtime.jar org.eclipse.wst.xml.xpath2.processor_1.2.0.jar xercesImpl.jar xml-apis.jar and then I tried copying all jars: cupv10k-runtime.jar icu4j.jar org.eclipse.wst.xml.xpath2.processor_1.2.0.jar resolver.jar serializer.jar xercesImpl.jar xercesSamples.jar xml-apis.jar Any suggestions would be welcome! With kind regards,Hans-Jürgen PS: I use Java version 1.8.0_181-b13

2 2

BaseX setup under Docker
by Wendell Piez 19 Jan '19

19 Jan '19

Hello BaseX friends, So it happens that I am trying to discover how to set up BaseX to run in Docker. By no means am I skilled in system administration. There are some instructions at http://docs.basex.org/wiki/Docker which are very helpful, not least in confirming that I have a reasonable idea. The last example given on that page, however, gives me pause. It appears to install git into the Docker image, but the commentary suggests it's something else including a modification to CLASSPATH. I wonder if the commentary is not out of sync with the example. Yet at the same time I just need to know more -- inasmuch as I would like my image to have SaxonHE available, the most recent version freely available from maven or best available means. What would the syntax be for that. and how do I determine what that is (presumably for apk)? As well as potentially amending the CLASSPATH, if need be, to add the saxon.jar ... Thanks for any hints. relevant tips or links to Docker help :-) Regards, Wendell -- Wendell Piez | wendell -dot- piez -at- nist -dot- gov | http://www.wendellpiez.com pellucidliterature.org | github.com/wendellpiez | gitlab.coko.foundation/wendell - pausepress.org

2 2

Documentation suggestion
by Marco Lettere 17 Jan '19

17 Jan '19

Hi Christian, I suggest to add an explicit statement of which is the default value of the combine option of map:merge. Currently the only reference is in the Change notes at the bottom of the page. Thanks! Marco.

2 4

file:read-text-lines performance
by George Sofianos 16 Jan '19

16 Jan '19

Hello, I'm trying to read a 4GB text file with 5 million lines and parse its contents. I'm using file:read-text-lines function <http://docs.basex.org/wiki/File_Module#file:read-text-lines> to do that. I managed to use fork-join and use 16 CPU threads to read the whole file by reading 10000 lines in each iteration, but it still takes 500 seconds for parsing / analyzing the data. Using a profiler I can see that most of the time is wasted reading each line - method readline <https://github.com/BaseXdb/basex/blob/0ef57de84659263c565ec41fff666ba5fa4f0…>. I plan to make some changes on the code tonight and see if I can find a way to read it faster, but I thought I should also post it here in case you have any tips. I'm also very inexperienced with using profilers so I hope I read the output correctly :) Regards, George

2 11

Concurrency WebDAV vs. REST API
by Andreas Jung 15 Jan '19

15 Jan '19

For development purposes I am running basehttp in foreground. The WebDAV endpoint seems to block while I run a larger import for REST with lots of ADD and STORE commands within one <commands>..</commands> section. The WebDAV connection times out…what is the explanation for this? Andreas

2 7

prof:variables() and inlining
by George Sofianos 14 Jan '19

14 Jan '19

Hello, just something I noticed. I was trying to check the variables of one of my functions, but it only returned an empty string. Reading [1] <http://docs.basex.org/wiki/Profiling_Module#prof:variables> gave me the impression that disabling inlining (locally or globally) would return these values. But it doesn't work for me in version 9.1.1 or latest snapshot. I tested it on 8.4.4 and it works, so either it is a regression or a changed behaviour. I usually open an issue on Github directly but I think you now prefer it in the mail list first. Regards, George

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BaseX-Talk January 2019