September 2009 - users-list

[MonetDB-users] Books CDs
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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] ubuntu server installation / php modules
by dariuszs 29 Mar '10

29 Mar '10

Hi, I've installed monetdb on *Ubuntu 9.04 Server* with apt-get. These are the contents of php client /. /usr /usr/share /usr/share/doc /usr/share/doc/php5-monetdb-client /usr/share/doc/php5-monetdb-client/changelog.Debian.gz /usr/share/doc/php5-monetdb-client/copyright I need the moduels, where are they? Thanks. Dariusz.

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[MonetDB-users] Possible wrong results when Querying
by LeonardF 10 Nov '09

10 Nov '09

Hi There, I have some problem with the row_number() over() function. Consider the following table: create table "table1" ("customer" varchar(40), "product" varchar(40), "price" double) insert into "table1" values ('cust1', 'p1', 100) insert into "table1" values ('cust1', 'p2', 200) insert into "table1" values ('cust1', 'p3', 150) insert into "table1" values ('cust2', 'p1', 300) insert into "table1" values ('cust2', 'p3', 200) The following query over this table: SELECT "customer", "product", "sumprice", (Row_number() OVER(PARTITION BY "customer" ORDER BY "sumprice")) as "rank" FROM ( SELECT "customer", "product", (Sum("price")) AS "sumprice" FROM "table1" GROUP BY "customer", "product") AS "temp" Returns: Customer product sumprice rank Cust1 p1 100 1 Cust1 p2 200 2 Cust1 p3 150 3 Cust2 p1 300 1 Cust2 p3 200 2 But doesn’t it suppose to return the following result set?: Customer product sumprice rank Cust1 p1 100 1 Cust1 p3 150 2 Cust1 p2 200 3 Cust2 p3 200 1 Cust2 p1 200 2 Thanks -- Leonard Forgge -- View this message in context: http://www.nabble.com/Possible-wrong-results-when-Querying-tp22821802p22821… Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] Download link broken?
by Guillaume Theoret 05 Oct '09

05 Oct '09

Hi, I tried to download the linux version of MonetDB/SQL on this page http://monetdb.cwi.nl/projects/monetdb//Download/ but both the lzma and bz2 links 404. I instead followed the Ubuntu instructions available here: http://monetdb.cwi.nl/downloads/Ubuntu/ and it worked fine but I thought I'd point out the above. Thanks, Guillaume

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[MonetDB-users] Announcement: New Aug2009-SP1 bugfix release of MonetDB suite
by Sjoerd Mullender 30 Sep '09

30 Sep '09

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2009-SP1 bug fix release of the MonetDB suite of programs. This is the first bug fix release for the Aug2009 release. More information on this release can be found at <http://monetdb.cwi.nl/projects/monetdb//Development/Releases/Aug2009/#Aug20…>. The sources and binaries are available at <http://monetdb.cwi.nl/projects/monetdb/Download/>. -- Sjoerd Mullender

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[MonetDB-users] xqueries from web apps and cgi scripts: ruby mapi interface ?
by Axel Belinfante 24 Sep '09

24 Sep '09

First of all, I'm a monetdb/xquery/ruby novice. I'm trying to do xqueries from the web in two ways: from a ruby-on-rails application, and from a cgi script. For the cgi script I use (a perl wrapper around) mclient, which seems to work ok. The remainder of this mail is about the access from ruby-on-rails. For the ruby-on-rails application, I typically have to do relatively small queries. The heart of the xqueries is in xquery module files (partly 'static', partly generated 'dynamically' from user data entered in web forms) and thus the queries to be done from ruby-on-rails are rather small: import the module, and invoke the right function with some parameters. I started using xrpc. However, I'm encountering issues that might be related to the fact that xrpc uses one backend, and mclient (by default) uses another one. (Being an xquery novice) I've also encountered some differences between the xquery support by both backends. I then started looking at the mapi interface, because that would allow the use of the same backend from both webapp an cgi scripts. To my understanding there are a couple of different routes possible, and I'm not sure what would be the best way. - use the native ruby code present in the MonetDB distribution this I tried, but it seems to not fully up-to-date/working in the Aug-2009 distribution at least, I had to hack MonetDBConnection.rb to make it work - use the swig mapi wrapper (via http://rubyforge.org/projects/monetdb-ror) I did not try that yet - somehow wrap mclient (using something like fork/exec from ruby) did not try that yet, but I have been using mclient to try queries - use libmapi to build my own translation daemon/program, that is kind of like mclient but e.g. without the prompts etc, that receives/sends xqueries/responses as strings on a socket (or so), and talks mapi to the database. I did not try this; I did compile and run the sample mapi program, which could be used as a start, I guess I'm kind of looking for comments, and in particular I'm curious about the status of the native ruby code included in the distribution - I would prefer to use that, but for some of the basic things I looked at the mapi C library seems to do things in a more involved way than the ruby code, which makes me wonder. On the other hand, it seems that for xquery support the library mainly has to pass strings around - not all the complicated things that seem to be necessary for, for example, the sql support. Thanks, Axel.

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[MonetDB-users] functions in group by
by mkurtulus 22 Sep '09

22 Sep '09

Hello, in our attempt to use monetdb as a backend for Mondrian, we are running into trouble with queries that Mondrian generates where functions are used in group by. eg. select substring('string',1,2) from mytable group by substring('string',1,2); Monet complains about a syntax error... On the contrary, using this syntax works: select substring('string',1,2) as col from mytable group by col; We have found a closed bug (http://sourceforge.net/tracker/index.php?func=detail&aid=946935&group_id=56…) in sourceforge that says it is not a bug, as using functions in group by is not supported in standard sql'99. We have thought of modifying Mondrian query generator to use the supported syntax... but the supported syntax is _not_ supported by Oracle ! So not supporting Oracle in favor of Monet is not (yet :) an option... Also notice that MS Sqlserver does not support aliases in group by either. Some even state that it is not standard sql... Reading the BNF was not of great help to me :-) Would you think supporting functions in group by could be done ? Mehmet -- Open WebMail Project (http://openwebmail.org)

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[MonetDB-users] dump & restore errors
by Alex Bo. 21 Sep '09

21 Sep '09

Hi, I'm failing to restore a dump from Feb09 to Aug09. I get these errors continuously when I try to restore: 0 tuples !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) !current transaction is aborted (please ROLLBACK) The problem is that the error messages aren't descriptive, I can't know what's going on. Any ideas? Thanks, Alex. -- View this message in context: http://www.nabble.com/dump---restore-errors-tp25530320p25530320.html Sent from the monetdb-users mailing list archive at Nabble.com.

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