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JDBC driver: sorting columns? - DatabaseMetaData#getColumns()
by Robert Koch 24 Nov '14

24 Nov '14

I am using DBVisualizer via JDBC to work with MonetDB. When exporting tables with DBVisualizers @export function, columns are sorted alphabetically, which causes problems when LOADING the exported csv into another database, and the import tool is expecting the original order of columns. I wrote to the DBVisualizer team, they answered as follows: "Hi Robert, Export uses the column order reported by the JDBC driver, so please consult your driver developer to see if you can get the driver fixed. More specifically, DbVisualizer uses the column order as reported by the DatabaseMetaData#getColumns() method." If MonetDB JDBC driver is actually sorting columns, could you please return the given order of table columns?

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To:11/19/2014 6:25:44 PM 1
by drrock1982 19 Nov '14

19 Nov '14

http://teamspl.com.sg/kq/vzxadbrpevtcdjxfltlghewxx.kyorlorbxfhoubwawxvbtvgf… drrock1982(a)rocketmail.com

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Multithreaded prob
by Doug Service 18 Nov '14

18 Nov '14

I have installed MonetDB and and started using it through MAPI. The documentation indicates that opening multiple connections from separate threads in a single process is supported. I perused the MAPI source and it appears that all of the Monet data structures used are associated with the connection. In our application the threads will be independent and processing similar but unique data sets each with its own connection to the database. No threads will share a database connection nor attempt to use another threads connection. Does anyone have experience using multiple threads in a single process each accessing a separate database MonetDB MAPI connection they would like to share? Did you have any problems? Doug Service

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CREATE TEMPORARY TABLE WITH DATA seems not working - Jan2014-SP3
by Satoshi Nagayasu 18 Nov '14

18 Nov '14

Hi all, As shown below, despite CREATE TABLE WITH DATA works fine, CREATE TEMPORARY TABLE WITH DATA is not able to create a temp table with data. --------------------------------------------------------- $ mclient mydb Welcome to mclient, the MonetDB/SQL interactive terminal (Jan2014-SP3) Database: MonetDB v11.17.21 (Jan2014-SP3), 'mapi:monetdb://localhost.localdomain:50000/mydb' Type \q to quit, \? for a list of available commands auto commit mode: on sql>CREATE TABLE t2 AS SELECT 1 WITH DATA; operation successful (1.143ms) sql>SELECT * FROM t2; +------+ | v | +======+ | 1 | +------+ 1 tuple (0.453ms) sql>CREATE TEMPORARY TABLE t AS SELECT 1 WITH DATA; operation successful (0.985ms) sql>SELECT * FROM t; +---+ | v | +===+ +---+ 0 tuples (0.439ms) sql> --------------------------------------------------------- Is this a bug? or something I misunderstand? Regards, -- NAGAYASU Satoshi <snaga(a)uptime.jp>

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[ftin.india.altair.com] Validate Email
by ashishkumar.singh＠altair.com 17 Nov '14

17 Nov '14

Validate Email Address ====================== Email validation to download secure attachment at ftin.india.altair.com. Please click on the following link to view the message: https://ftin.india.altair.com:8443/validate/eJCZlisrascBO00ffEVsQu/LasnXi5p… Or alternatively, enter this validation codein the browser window where you entered your email address: LasnXi5p0Y6ExdEYOSxmmU This code and link is valid for 20 minutes from the request, until 17:23. Please click on the original link in the message email if the link has expired to request a new validation email.

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Operations on Network Addresses
by Tim Burress 14 Nov '14

14 Nov '14

Hello, I'm a relatively new user and have run into a problem which may just be a misunderstanding. I'm using the Oct2014 version, installed on Fedora 20 from the MonetDB rpm repository. When I try to query a database using inet "containment" operators like << or <<= it seems that the operators are not recognized: sql> select src,dst from raw.ids where src << inet'xxx.xxx.xxx.xxx/27'; SELECT: no such binary operator 'left_shift(inet,inet)' sql> select src,dst from raw.ids where src <<= inet'xxx.xxx.xxx.xxx/27'; syntax error, unexpected '=' in: "select src,dst from raw.ids where src <<=" Other ordinary binary inet operators seem OK: sql> select src,dst from raw.ids where src = inet'xxx.xxx.xxx.xxx'; (prints out table) sql> select src,dst from raw.ids where src < dst; (prints out table) However the documented functions do not seem to be recognized: sql> select masklen(inet'192.168.0.0/24') SELECT: no such unary operator 'masklen(inet)' sql> select netmask(inet'192.168.0.0/24') SELECT: no such unary operator 'netmask(inet)' So it seems that support for network address types is only partially available in this release. Is that normal? Do I need to rebuild from source in order to get them? Thanks! Tim

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Security Precautions Of Using Monet DB
by kannan rbk 13 Nov '14

13 Nov '14

Hi, I am started using of MonetDB in our development environment, we decided to move this to our production environment. Before deploying into production environment, I want to know about existing security vulnerabilities and precautions to be taken care of using MonetDB. I had searched in www.monetdb.org, but I haven't found required things. Could you please suggest me any security advisory documents or help guide? I can't find anything in nvd.nist.gov vulnerability database. -- Regards, Kannan RBK

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Struggling with the MINUS operator
by Leon-Constantin Fopa 13 Nov '14

13 Nov '14

Hi ! Here is the query I ran : sql> SELECT s,o FROM "prop_XXX" MINUS SELECT s,o FROM "class_XXX" ; and here is the error I got : syntax error, unexpected SELECT, expecting SCOLON in: "select s,o from "prop_XXX" minus select" Did I missed something ? best regards,

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how to obtain the number of row affected by an INSERT query ?
by Leon-Constantin Fopa 13 Nov '14

13 Nov '14

Hi ! When using the user-interface mclient it quite useful to see the numbers of rows affected by your INSERT query. sql>INSERT INTO ..... 125 affected rows (832.608ms) I wonder if there is a way to obtain this information within a server-side SQL program in MonetDB like Oracle does with SQL%ROWCOUNT in PG/SQL? thanks in advance !

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Monet Bulk load does not work from Java after upgrade to Oct2014
by Radovan Bičiště 13 Nov '14

13 Nov '14

Hello, I hate to be a bugger again. :( We use Pentaho PDI (KETTLE) for loading data from our Oracle DWH to MonetDB. After upgrade from Oct2013-SP6 to Oct2014 bulk loaders stopped working. Any attempt to use ends with Server connection lost message. Here is log message from KETTLE: 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - COPY 1 RECORDS INTO drmaxtst.typy_pohybu_stage FROM STDIN USING DELIMITERS '|',' 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - ','"' NULL AS 'null'; 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - ERROR (version 5.0.1-stable, build 1 from 2013-11-15_16-08-58 by buildguy) : Error in step, asking everyone to stop because of: 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - ERROR (version 5.0.1-stable, build 1 from 2013-11-15_16-08-58 by buildguy) : org.pentaho.di.core.exception.KettleException: 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - An error occurred writing data to the MonetDB API (MAPI) process 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - Connection to server lost! 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.writeBufferToMonetDB(MonetDBBulkLoader.java:506) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.writeRowToMonetDB(MonetDBBulkLoader.java:230) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.processRow(MonetDBBulkLoader.java:207) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.step.RunThread.run(RunThread.java:60) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at java.lang.Thread.run(Thread.java:744) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - Caused by: java.io.IOException: Connection to server lost! 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at nl.cwi.monetdb.mcl.io.BufferedMCLReader.waitForPrompt(BufferedMCLReader.java:197) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.writeBufferToMonetDB(MonetDBBulkLoader.java:494) 2014/11/13 11:13:02 - MonetDB Bulk Loader.0 - ... 4 more To be honest the problem first showed up after upgrade from Jan2014SP1 to Jan2014SP2. I was hoping it might be temporary which seems it is not. Thank you for any help, Radovan

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