August 2012 - users-list

[MonetDB-users] Books CDs
by CHARTS LICENSING 11 Aug '24

11 Aug '24

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[MonetDB-users] XQuery API and XLink/XUpdate support
by Alexandra Mart�nez 27 Jun '24

27 Jun '24

Hello all, I was wondering if there is any documentation about the API for XQuery (i.e., how to write xqueries from a Java program). Also, I am interested in using some features of XLink and XUpdate on top of my XML database. Is support for any of these in progress? Thanks in advance, Alexandra ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/

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[MonetDB-users] Proofreading your professional documents
by Richard Hounslow 24 Feb '24

24 Feb '24

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[MonetDB-users] Different results with same query
by Matthieu Guamis 08 Nov '12

08 Nov '12

Hello, Running the same query on the same data leeds to different results between postgresql and monetdb. I have not been able to get a simple example to reproduce the problem. So here is what I observe: the query: select temps_mois.rfoperdmo as c1, sum((case when dwhinv.dwhinv___rfodomide = 'RH' and dwhinv.dwhinv___rfoindide = 'tech_rh_effectif_rem_reel' then dwhinv.dwhinvqte else 0 end)) as m0 from rfoper_temps_mois as temps_mois, dwhinv as dwhinv, rfovsn as rfovsn_0, rrhamv as rrhamv_1, rrhcov as rrhcov_2, rfoadv as rfoadv_3 where temps_mois.rfoper___rforefide = 'HPLUS' and dwhinv.dwhinv___rforefide = 'HPLUS' and dwhinv.dwhinv___rfodomide = 'RH' and dwhinv.dwhinv___rfoindide = 'tech_rh_effectif_rem_reel' and dwhinv.dwhinvdtd = temps_mois.rfoperdtd and temps_mois.rfoperyea = '2011' and rfovsn___rforefide = 'HPLUS' and dwhinv.dwhinv___rfovsnide = rfovsn_0.rfovsnide and rfovsn_0.rfovsnide = '201111_reel' and rrhamv_1.rrhamv___rrhvemide='GRACOR' AND rrhamv_1.rrhamvrvs=1 AND rrhamv_1.rrhamv___rforefide= 'HPLUS' and dwhinv.dwhinv___rrhempide = rrhamv_1.rrhamvinf and rrhamv_1.rrhamvsup = 'CEMP' and rrhcov_2.rrhcov___rrhvcoide='CONTRATS' AND rrhcov_2.rrhcovrvs=1 AND rrhcov_2.rrhcov___rforefide= 'HPLUS' and dwhinv.dwhinv___rrhcntide = rrhcov_2.rrhcovinf and rrhcov_2.rrhcovsup = 'CONTRATS' and rfoadv_3.rfoadv___rfovdeide='STRC' AND rfoadv_3.rfoadvrvs=1 AND rfoadv_3.rfoadv___rforefide= 'HPLUS' and dwhinv.dwhinv_p2rfodstide = rfoadv_3.rfoadvinf and rfoadv_3.rfoadvsup = 'HPLUS' group by c1 order by c1 Postgresql result: c1 | m0 ----+----------------- 01 | 7111.5376967750 02 | 7100.9108821426 03 | 7150.2597967742 04 | 7151.4283666667 05 | 7109.1641451610 06 | 6976.2108421239 07 | 6329.7404193564 08 | 6302.9823032247 09 | 6426.9459633351 10 | 6519.6889580648 11 | 6549.5235033402 12 | 6492.5477161292 (12 lignes) Monetdb result: +------+----------------------+ | c1 | m0 | +======+======================+ | 12 | 1.000000 | | 11 | 1.000000 | | 10 | 2.000000 | | 09 | 0.366667 | | 08 | 1.000000 | | 07 | 1.000000 | | 06 | 1.000000 | | 05 | 3.000000 | | 04 | 4.000000 | | 03 | 15.000000 | | 02 | 9.964286 | | 01 | 1.000000 | +------+----------------------+ 12 tuples (212.346ms) As you see, all "m0" values are very different. I have no idea of what is causing this but if I modify the query in order to simplify the CASE...WHEN...ELSE part of the select, it produce the expected result: replacing sum((case when dwhinv.dwhinv___rfodomide = 'RH' and dwhinv.dwhinv___rfoindide = 'tech_rh_effectif_rem_reel' then dwhinv.dwhinvqte else 0 end)) as m0 by sum((case when dwhinv.dwhinv___rfoindide = 'tech_rh_effectif_rem_reel' then dwhinv.dwhinvqte else 0 end)) as m0 Its not exactly the same query but it must leeds to the same result due to my test datas (its the case in postgres) I join to this email two files with the TRACES, respectively for the request with bad/correct result (ko.txt/ok.txt) Config: Ubuntu Server 11.04 x64 MonetDB v11.7.9 (Dec2011-SP2), MonetDB Database Server v1.6 (Dec2011-SP2), MonetDB Database Server Toolkit v1.0 (Dec2011-SP2) Thank you very much for your help!! -- *Matthieu Guamis* *Logo Axège <http://www.axege.com/>* /Axège// 23,rue Saint-Simon 63000 Clermont-Ferrand/ Tél: +33 (0)4 63 05 95 40 Fax: +33 (0)4.73.70.65.29 Email: matthieu.guamis(a)axege.com <mailto:matthieu.guamis@axege.com>

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[MonetDB-users] Is there IF(), IFNULL() in SELECT?
by Dmitry Insta 31 Aug '12

31 Aug '12

Sorry if it was asked before, I can't find a comprehensive list of functions available. Is it possible to somehow implement something like this: SELECT IF(col1>0,'Negative','Positive') as Sign, IFNULL(col2,'Empty',col2) as col2 FROM table; // it's just an example, not the exact query :) Thanx!

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[MonetDB-users] how to set see mserver5 config
by guangliang peng 30 Aug '12

30 Aug '12

hi, I want to see mserver5 configure for example dbfarm,dbname. I don't know the command and hwo i set the gdk-vmtrim =no .I don't know hwo to set the GDK PARAMETERS .Can you guys help me? best reguards, guangliang

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[MonetDB-users] Migration DW to MonetDB
by R＠quel 27 Aug '12

27 Aug '12

Hi, I have a question, i need comparison the execution query times between MonetDB and SQL 2008 in Data Warehouse (applying a different orientations database systems). But i have a problem, i used the AdventureWorkR2 2008 but i don't know how i can migrate the information to MonetDB. To compare the same data. Someone help me? Please. It's very important. Thanks, Raquel -- View this message in context: http://old.nabble.com/Migration-DW-to-MonetDB-tp34348184p34348184.html Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] what's the trigger of monetdb releasing memory
by guangliang peng 27 Aug '12

27 Aug '12

hi , when I ran some queries on monetdb,I found that the memory was automatically released by monetdb.And it needs extra time to load data into memory again.I don't know why and if there are some triggers in monetdb? Thank you for helps. best reguards, guangliang

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[MonetDB-users] New Grouping Implementation
by David893 26 Aug '12

26 Aug '12

Hi Folks, I've seen that you re-implemented the grouping functions. Will it have effect on performance (on non-ordered columns)? Right now we're running MonetDB on a 1billion data set, mostly for grouping and aggregating, we're very happy with the performance, but of-course, any improvement is highly welcome :). If it does affect performance, we'll be the first to test and report. you guys rock!, keep up the great work. -- View this message in context: http://old.nabble.com/New-Grouping-Implementation-tp34348175p34348175.html Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] monetdb crashed when using copy into .... locked
by li, xiaohua 24 Aug '12

24 Aug '12

Hi: does anybody know what's the problem with the copy into of locked? we want to use concurrent copy into to a table, seems montdb not good at this. some body says add locked, we try, but the database crached. we just test like this copy 200 OFFSET 1 RECORDS into f_activity from 'd:\bcp.txt' USING DELIMITERS '|','\n' NULL AS '' LOCKED seems need single user mode, but how to set single user mode? Lixiaohua Shanghai,China

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