December 2009 - 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] Meaning of: Scenario not initialized 'sql'
by Alex Bo. 17 Jun '10

17 Jun '10

Hi, Sometimes I get !MALException:setScenario:Scenario not initialized 'sql' from the server when I try to start it in scenarios that usually work without any problems. I can't reproduce it consistently, but sometimes I get it. What does this exception mean? Thanks. -- View this message in context: http://www.nabble.com/Meaning-of%3A-Scenario-not-initialized-%27sql%27-tp26… Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] Parallel Processing
by Nafees Ur Rehman 04 May '10

04 May '10

Hi, Does monetdb has support for parallel processing? If some can guide me on that. Regards Nafees Ur Rehman

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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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Re: [MonetDB-users] segfault with monetdb_sql().
by Guillaume Yziquel 02 Jan '10

02 Jan '10

Martin Kersten a écrit : >>> >>> Program received signal SIGSEGV, Segmentation fault. >>> [Switching to Thread 0x2aaaaf66d910 (LWP 4061)] >>> 0x00002aaaac676de3 in findBox () from /usr/lib/libmonetdb5.so.5 > > i miss here the line number, seems that is ubunti specific > you can do > print i > print box[i] > print name Providing debian packages of libraries with debugging symbols would be great. > i suspect box[i] is not properly initialized to 0 I'll try to check that. >>> (gdb) backtrace >>> #0 0x00002aaaac676de3 in findBox () from /usr/lib/libmonetdb5.so.5 > this gives one hint, it is likely passed without name causing idcmp to fail >>> #1 0x00002aaaac677086 in openBox () from /usr/lib/libmonetdb5.so.5 >>> #2 0x00002aaab7a51cbb in MTIMEprelude () from > > happens while loading the data/time module. It initializes the "time" > module Should I assume that the mtime.mal + lib_mtime.so is the first one to be loaded? Just to know if some dynamic linking successfully happened before or not. >>> /usr/lib/MonetDB5/lib/lib_mtime.so >>> #3 0x00002aaaac6826cf in ?? () from /usr/lib/libmonetdb5.so.5 >>> #4 0x00002aaaac68b2a0 in runMAL () from /usr/lib/libmonetdb5.so.5 >>> #5 0x00002aaaac67cac7 in MALengine () from /usr/lib/libmonetdb5.so.5 >>> #6 0x00002aaaac67d5f6 in malBootstrap () from /usr/lib/libmonetdb5.so.5 >>> #7 0x00002aaaac669f75 in mal_init () from /usr/lib/libmonetdb5.so.5 >>> #8 0x00002aaaab91ef60 in ?? () from /usr/lib/libembeddedsql5.so >>> #9 0x00002aaaab39b73a in start_thread () from /lib/libpthread.so.0 >>> #10 0x00002aaaab67c69d in clone () from /lib/libc.so.6 >>> #11 0x0000000000000000 in ?? () >>> (gdb) >> >> Please tell me what else could be useful. > > This was already useful, because i added two additional defense lines > to capture improperly set environments. OK. I'll check. >>> I am not an CAML expert, but i guess there may be potential issues >>> in location and dynamic loading of the necessary libraries. >>> Where does CAML get the libraries from? >> >> As a rather general statement, dynamic loading is supported within >> OCaml world. I'm not so sure how this works when it is C code that >> triggers dynamic loading, with OCaml in bytecode mode... > > I have added some extra code to make failing loads more visible. > In general, it seems that the modules are not found at the location I'll ask on the OCaml list for that. >> I would like to pinpoint the segfault more precisely in order to go >> back to the OCaml mailing list about potential dynamic loading issues. > I think it can not find your libraries > > set the variable gdk_debug=10 this will show you the environment > settings as seen upon start. Including the location where it expect > database and libraries to recide. Will do that. However, I believe it is not a problem of location, as this works out fine when the OCaml binding is compiled to native code. All the best, -- Guillaume Yziquel http://yziquel.homelinux.org/

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[MonetDB-users] (no subject)
by Zoltan Tomory 30 Dec '09

30 Dec '09

Hi everybody, Forgive the reference to a cartoon, but it seems strangely on topic ... >There's a wonderful comic strip on the web called xkcd; I don't know if you've heard of it. I have to share this one with you. It's called "Exploits of a mother": > >http://xkcd.com/327/ Happy New Year! Zoltan Tomory zoltan.tomory(a)mobot.org

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Re: [MonetDB-users] segfault with monetdb_sql().
by Guillaume Yziquel 29 Dec '09

29 Dec '09

Hello. As some discussion had gone off-list, here's some relevant background: The OCaml binding works when the OCaml library is compiled to native code, and it segfaults when the OCaml library is compiled to bytecode. Martin Kersten a écrit : > > What is the gdb stack trace of the processes involved? segfaults are only > analysed that way. Quite new to gdb, so I do not know if this is what you've asked for: > gdb --args ocamlrun test/monetdb_sql.byte > GNU gdb (GDB) 7.0-debian > Copyright (C) 2009 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > and "show warranty" for details. > This GDB was configured as "x86_64-linux-gnu". > For bug reporting instructions, please see: > <http://www.gnu.org/software/gdb/bugs/>... > Reading symbols from /usr/bin/ocamlrun...(no debugging symbols found)...done. > (gdb) run > Starting program: /usr/bin/ocamlrun test/monetdb_sql.byte > [Thread debugging using libthread_db enabled] > [New Thread 0x2aaaaf66d910 (LWP 4061)] > > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 0x2aaaaf66d910 (LWP 4061)] > 0x00002aaaac676de3 in findBox () from /usr/lib/libmonetdb5.so.5 > (gdb) backtrace > #0 0x00002aaaac676de3 in findBox () from /usr/lib/libmonetdb5.so.5 > #1 0x00002aaaac677086 in openBox () from /usr/lib/libmonetdb5.so.5 > #2 0x00002aaab7a51cbb in MTIMEprelude () from /usr/lib/MonetDB5/lib/lib_mtime.so > #3 0x00002aaaac6826cf in ?? () from /usr/lib/libmonetdb5.so.5 > #4 0x00002aaaac68b2a0 in runMAL () from /usr/lib/libmonetdb5.so.5 > #5 0x00002aaaac67cac7 in MALengine () from /usr/lib/libmonetdb5.so.5 > #6 0x00002aaaac67d5f6 in malBootstrap () from /usr/lib/libmonetdb5.so.5 > #7 0x00002aaaac669f75 in mal_init () from /usr/lib/libmonetdb5.so.5 > #8 0x00002aaaab91ef60 in ?? () from /usr/lib/libembeddedsql5.so > #9 0x00002aaaab39b73a in start_thread () from /lib/libpthread.so.0 > #10 0x00002aaaab67c69d in clone () from /lib/libc.so.6 > #11 0x0000000000000000 in ?? () > (gdb) Please tell me what else could be useful. > I am not an CAML expert, but i guess there may be potential issues > in location and dynamic loading of the necessary libraries. > Where does CAML get the libraries from? As a rather general statement, dynamic loading is supported within OCaml world. I'm not so sure how this works when it is C code that triggers dynamic loading, with OCaml in bytecode mode... I would like to pinpoint the segfault more precisely in order to go back to the OCaml mailing list about potential dynamic loading issues. > We can help (on Xmas days) only with proper output. The level of > programming > calls for expertise in dealing with C debuggers, dynamic loaders, and > thread > management. Guessing does not bring us further. You have to use the > right tools. OK. This is always a good opportunity to learn more about C world... Thanks for pointing out the right tools. All the best, -- Guillaume Yziquel http://yziquel.homelinux.org/

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[MonetDB-users] Instalation prob. in Ubuntu
by Rui Anastácio 28 Dec '09

28 Dec '09

Hi, I'm trying to install monetdb in my Linux Ubuntu 9.10 Karmik and have followed the instructions but have this dependency problem: monetdb-geom-dev: Depends: libmonetdb5-geom0 not installable monetdb-testing: Depends: python-monetdb not installable Regards Rui Anastácio

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