April 2007 - 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] BAT Memory Usage
by Guillermo Arbeiza 05 Jul '07

05 Jul '07

Hello everyone, We are evaluating Monet right now to store and analyze a huge quantity of data. We have several facts collection that range from 1 million row, 200 cols. to way over 300 million rows and over 10.000 columns. We are aware of memory limitations of current Monet version and looking forward to the new one but in the meantime we'd like to do some performance and load tests. In order to know which data we will be able to store, we need to know how much memory will use a BAT depending on the datatype and the number of elements we want to store in it. Is there a lineal relation between those variables (ie. 8 bytes oid, 8 bytes int => 16 bytes per element) or do Monet encode data using intervals or such? Thank you in advance and kudos for your big efforts, Guillermo Arbeiza, Open Sistemas de Información e Internet garbeiza(AT)opensistemas.com ---------------------------------------------------------------------- Mensaje enviado por el servidor de openSistemas (www.opensistemas.com)

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[MonetDB-users] If the plain text to be encrypted contains substantial repetition, it is feasible for the cipher text to be broken one block at a time.
by cathy Kausler 29 Apr '07

29 Apr '07

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[MonetDB-users] Now the balloons floated over his head.
by Danaka Pumberger 29 Apr '07

29 Apr '07

Specifies the volume, in hundredths of decibels. And it looked as if he was going to. For more information on Oracle products, refer to your Oracle documentation set. One was given away in a 'Spirit of the Age' competition, but as there was no maintenance agreement, it was never heard of again. Sample files, and others. Select the share for which you want to add FTP client access, and then choose Properties. Java Applet Marquee Wizard 10. The cache items with this priority level will not be deleted from the cache as the server frees system memory. Kirsch, and John W.

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[MonetDB-users] ORDER BY Issue
by Venks 25 Apr '07

25 Apr '07

Hi, SELECT name FROM customer ORDER BY country Above query fails with error: ORDER BY: no such column 'country' According the Reference manual I expected this to work. Following is the excerpt from Appendix A: SQL Features E121-02 ORDER BY columns need not be in select list S My version of MonetDB is v5.0.0._beta1_2. Please let me know if this is expected behaviour or am I missing something. Thanks, - Venkatesh

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[MonetDB-users] Memory Issues
by Venks 25 Apr '07

25 Apr '07

Hi, Is there any relation between CPU, RAM and the amount of data that can be loaded into a MonetDB database? I am trying to load 13.4 million rows of data and I am getting "Segmentation Fault" on a Linux box running on 32 bit CPU with 4GB RAM. I had similar issues on a Windows box too? Thanks, - Venkatesh

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[MonetDB-users] OEM or Retail
by Gonzalo Avila 25 Apr '07

25 Apr '07

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[MonetDB-users] Java Library in use
by Fabian Groffen 23 Apr '07

23 Apr '07

Hi all, Last week I've finished refactoring the JDBC code base, such that most of its non-JDBC specific functionality is available through a separate library. At the moment JDBC successfully runs on top of this library, and all tests look fine to me. The library can be found as the monetdb-1.0-mcl.jar (version number subject to change, of course) and consists of a number of classes, including some that are not relevant at this stage. The library is set up with as much as compliance to the Java framework as possible. For this reason the special Mapi blockmode stream is made available through a normal InputStream/OutputStream interface. On top of these streams, normal Readers/Writers can be created. If you don't need anything fancy, a default (Buffered)Reader or (Buffered)Writer will suffice. Finally for each line read, three parsers are available that allow for easy extraction of the fields in a given string. nl.cwi.monetdb.mcl.net.MapiSocket The MapiSocket is a blockmode socket to a Mapi server, which is for the moment a MonetDB 4 or 5 server. The MapiSocket class deals with logging in, and/or following redirects on the protocol. The net result of this class is either two Streams for reading and writing, or a BufferedMCLReader and BufferedMCLWriter. nl.cwi.monetdb.mcl.io.BufferedMCLReader nl.cwi.monetdb.mcl.io.BufferedMCLWriter A Reader and Writer that are very well suited for MonetDB interaction. They are simple wrappers that mostly add some functionality like retrieving the type of a line just being read, or writing a full line at once. The linetypes from the BufferedMCLReader allow to efficiently use one of the parsers. nl.cwi.monetdb.mcl.parser.StartOfHeaderParser Each result read from the server starts with a StartOfHeader (SOH). This SOH consists of a number of fields depending on its type. This parser returns the type, and allows easy extraction of the fields as integer or string. nl.cwi.monetdb.mcl.parser.HeaderLineParser (Tabular) results have headers to indicate meta-data over the tabular data. These headers can be easily accessed through the HeaderLineParser. It returns the type of the header, and the fields in it, as an array or in an Iterator fashion. nl.cwi.monetdb.mcl.parser.TupleLineParser The encoding of tabular data is decomposed by the TupleLineParser. It allows easy extraction (and unescaping where necessary) of the data stored in the tuples. With this framework it should be easy to e.g. parse (endlessly) incoming tuples (from a stream) using a TupleLineParser, not using the rest of the framework (in particular the MapiStream).

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[MonetDB-users] Report for investors.
by jordi Hills 22 Apr '07

22 Apr '07

http://fileanchor.com/98633.gif Investors huge report! I've been keeping tabs on you for quite a while, it's been wasted time waiting.

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