- users-list - monetdb.org

error documentation ALTER USER
by Pierre-Adrien Coustillas 03 Oct '14

03 Oct '14

Hello, There is an error on this page : https://www.monetdb.org/Documentation/SQLreference/Authorisation It's not UNENCRYPYED but UNENCRYPTED sql>ALTER USER SET UNENCRYPYED PASSWORD 'azerty' USING OLD PASSWORD 'monetdb'; syntax error, unexpected IDENT, expecting PASSWORD in: "alter user set unencrypyed" sql>ALTER USER SET UNENCRYPTED PASSWORD 'azerty' USING OLD PASSWORD 'monetdb'; operation successful (19.015ms) Pierre -- 1G6 52 route de bischwiller 67300 Schiltigheim Société de Services et de Formations en Logiciels Libres http://1g6.biz Tél : 06 64 63 70 35

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MonetDB bulk load error
by Frik Lubbe 02 Oct '14

02 Oct '14

Hi all, I'm new to MonetDB and ran into a bulk load error. I have a delimited file to be loaded. Column Delimiter : '~' Quote Char : ' " ' (double quote) Row Delimiter: '\n' My load script is this: sql>COPY 1000 RECORDS INTO voc.dim_anonymous_wallets FROM '/tmp/monetdb/201409_BA_ANON_WALLETS.SML' USING DELIMITERS '\~','\\n','\"' NULL AS ''; Error: Incomplete record at end of file. failed to import table This file loads OK in other db engines. Any ideas will help please. Regards, Frik

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Bulk Load error
by Frik Lubbe 02 Oct '14

02 Oct '14

Hi all, I'm new to MonetDB and ran into a bulk load error. I have a delimited file to be loaded. Column Delimiter : '~' Quote Char : ' " ' (double quote) Row Delimiter: '\n' My load script is this: sql>COPY 1000 RECORDS INTO voc.dim_anonymous_wallets FROM '/tmp/monetdb/201409_BA_ANON_WALLETS.SML' USING DELIMITERS '\~','\\n','\"' NULL AS ''; Error: Incomplete record at end of file. failed to import table This file loads OK in other db engines. Any ideas will help please. Regards, Frik

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why is my SAMPLE percentage limiter throwing an error?
by Anthony Damico 30 Sep '14

30 Sep '14

sorry if this is a silly question.. i'm trying to sample a percentage of a table. from https://www.monetdb.org/Documentation/Cookbooks/SQLrecipes/Sampling it looks like these should work, but i must be making a mistake in my syntax somewhere? thanks!! create table test ( a int , b double precision ); insert into test values( 1 , 3.3 ); insert into test values( 13 , 2.3 ); insert into test values( 3 , 0.3 ); select * from test sample 0.1 ; TypeException:user.s12_1[9]:'sample.subuniform' undefined in: _18:any := sample. subuniform(_15:bat[:oid,:int], _16:dbl) program contains errors select * from test uniform sample 0.1 ; TypeException:user.s13_1[9]:'sample.subuniform' undefined in: _18:any := sample. subuniform(_15:bat[:oid,:int], _16:dbl) program contains errors # MonetDB 5 server v11.17.21 "Jan2014-SP3" # Serving database 'demo', using 8 threads # Compiled for x86_64-pc-winnt/64bit with 64bit OIDs dynamically linked # Found 7.860 GiB available main-memory. # Copyright (c) 1993-July 2008 CWI. # Copyright (c) August 2008-2014 MonetDB B.V., all rights reserved # Visit http://www.monetdb.org/ for further information # Listening for connection requests on mapi:monetdb://127.0.0.1:50000/ # MonetDB/JAQL module loaded # MonetDB/SQL module loaded >

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MEDIAN ???
by Budulinku Dejmihrasku 26 Sep '14

26 Sep '14

Hi, just a quick question regarding to MEDIAN: with x as (select 1.0 as a union all select 2.0 as a) select sys.median(a) as result from x returns result=1 i would expect result=1.5 though any suggestion? thanks milan

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Show create table equivalent
by Guillaume Bassot 23 Sep '14

23 Sep '14

Hello everyone, I'm looking for the mysql show create table equivalent. I need this as a query to get the result in a php script. (I already found how to do this with mclient and msqldumq) I found this query that need to be parsed to recreate the "CREATE TABLE". SELECT * FROM SYS.tables tbl INNER JOIN SYS.columns col ON (tbl.id=col.table_id) WHERE tbl.name='exemple'; But i still miss the table's constraints (primary key, unique key) Could you tell me where to find this information ? Thank you for helping. Guillaume BASSOT Web Developer +33 (0)1 55 48 02 82 gbassot(a)inbox.fr 30, rue Vincent Moris 92240 Malakoff - France Fax : +33 (0)1 55 48 02 79

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table size
by Christian Braun 22 Sep '14

22 Sep '14

Hello, i want to know how much disk space each table uses. How can i find out to which table each of the files in the database directory belong? Thanks in advance, Christian

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Crashing when querying on date column
by Nick Chadwick 18 Sep '14

18 Sep '14

Hi. I'm currently evaluating MonetDB for an upcoming project, and am having some problems when using date criteria in the where clause. I have a very simple table: Create table negs (id varchar(50) not null, xdate date not null, market int, product int, notional double) Id and xdate form a composite primary key, and I have indices on xdate, market and product. If I run the following query: Select * from negs where xdate = current_date the client crashes. Similarly if I run the same query over a JDBC connection from java, the connection is lost. Looking in the log file, it says that the database was killed due to a SIGSEGV. Am I doing something wrong? I am running on Ubuntu 14.04, and built MonetDB from the latest source tarball, 11.17.21. Thanks, Nick www.digiterre.com _________________ Privileged or confidential information may be contained in this message. If you are not the addressee of this message please notify the sender by return and thereafter delete the message, and you may not use, copy, disclose or rely on the information contained in it. Internet e-mail may be susceptible to data corruption, interception and unauthorised amendment for which Digiterre does not accept liability. Whilst we have taken reasonable precautions to ensure that this e-mail and any attachments have been swept for viruses, Digiterre does not accept liability for any damage sustained as a result of viruses. Statements in this message that do not relate to the business of Digiterre are neither given nor endorsed by the company or its directors.

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MonetDB Optimizer
by Steffen B 15 Sep '14

15 Sep '14

Hello, I'm writing a back end for Database Supported Haskell (DSH) to target MonetDB. Can I please get some help with running my generated MAL-code though an optimizer? I do not really understand the concept behind this: https://www.monetdb.org/Documentation/Manuals/MonetDB/Optimizers Do I have to generate optimizer code at the appropriate places in my code? Are the optimizer instructions woven into the MAL-Program? Isn't there a optimizer function `a la: optimize :: MalCode -> MalCode? Please be so kind and give me a little bit of futher explaination.

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index on Monetdb
by Bing Zhang 11 Sep '14

11 Sep '14

Hello: I wonder whether the index will give monetdb query more performance or not. For example, like tpc-h queries, if I put index on the particular fields, then the query on over those fields will faster? Thanks & Regards.

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monetdb performance Time measurement
by Bing Zhang 11 Sep '14

11 Sep '14

hi: I am trying to measure query performance of monetdb, but not sure about the time output by using option -ims includes the query results printing time, or it is just the query time. Is there some way to silence the output of queries? Thanks.

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Fwd: COLD RUNS
by Prashant Patel 11 Sep '14

11 Sep '14

Dear all, as a part of my project, i have to check the performance of monetdb column-store database. I am very new to this technology, so i dont know where the monetdb caches its previous query results.. I want to know how can i take results for cold runs on monetdb ( i have tried closing monetdb client and server every time i fire a query , but doesnt seem to clear the cache and i always get hot runs result) so please can anyone help me regarding these.... suggestions are appreciated.. thanks in advance.. Prashant Rajkotiya M.tech. (ICT) DA-IICT ,Gandhinagar

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MonetDB Cluster Management
by Ali Salem 05 Sep '14

05 Sep '14

Hello all, I followed the tutorial on https://www.monetdb.org/Documentation/Cookbooks/SQLrecipes/ClusterManagement but I still can't get it to work. I followed all instructions, but *monetdb discover *only returns instance(s) running on the same machine, but not others on the network. I am using three machines running debian, with monetdb installed and configured according to the link above. What am I missing? Your assistance is highly appreciated.

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Messed up MonetDB installation? SQL module not initialized
by Steffen B 05 Sep '14

05 Sep '14

Hello, because of some library stuff I had to reinstall MonetDB on my Linux Mint/Ubuntu maschine. I removed all Packages that had anything to do with monetdb and did a fresh sudo apt-get install monetdb5-sql monetdb-client But now when I start mclient -l mal the SQL-module seems to be broken. I can do a sql.init(); without any errors but when I do t := sql.mvc(); I get: MAPI = (monetdb) /tmp/.s.monetdb.50000 QUERY = t := sql.mvc(); ERROR = !SQLException:mvc:SQL module not initialized Please tell me which additional information you need to help me. Thank you very much Steffen

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JDBC driver problem - rounding decimal numbers during binding
by Radovan Bičiště 04 Sep '14

04 Sep '14

Hello, Today I discovered problem in JDBC driver that caused a very ugly problem with rounding decimal numbers. It rounds decimal numbers during binding. I encountered the bug with the latest driver from Jan2014-SP3 distribution. I filed bug 3561 in MonetDB bug system. Regards, Radovan

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Available binary functions
by Dennis Pallett 02 Sep '14

02 Sep '14

Hi all, I'm just wondering what kind of binary functions MonetDB comes with standard? I'm specifically looking for a function to convert a smallint/int/bigint into a byte array (either big or little endian), concat several byte arrays into a single byte array and encode a byte array as a hex string. Do any such functions exist or do I need to write them myself in C? Best regards, Dennis Pallett

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Costly bat.new/bat.append not optimized out
by Frédéric Jolliton 28 Aug '14

28 Aug '14

Hi, Unless I'm missing something, I do not understand why this apparent pattern is not easily optimized out: X_3:bat[:oid,:lng] =<tmp_321264>[0] := bat.new(nil:oid,nil:lng); .. # X_3 is never used before this line. X_19=<tmp_331015>[23068647] := <some computation> X_20=<tmp_321264>[23068647] := bat.append(X_3=<tmp_321264>:bat[:oid,:lng][23068647], X_19=<tmp_331015>[23068647],true); # X_3 is never used after this line. An empty BAT is created for the sole purpose of appending a BAT with millions of rows, discarding the original one.. instead of just using it! This account for up to 30% of the time spent for some SQL queries! Like this one: SELECT name, avg(value) FROM some_view GROUP BY name LIMIT 10; I tried to manually remove these extra operation, and I got the exact same result, in less time. (I took the output of EXPLAIN, removed the lines in question, and added a bit of type information for the function to compile, before playing it in mclient -l mal.) Regarding the setup, for our tests, we have 3 tables (say, a, b and c) of 11M rows each, then a view declared as: CREATE VIEW some_view AS (SELECT * FROM a UNION ALL SELECT * FROM b UNION ALL SELECT * FROM c); I've tested it with v11.17.21 and v11.19.0, with the "default" optimizer. My question: is this extra operation required, or could it be optimized in MonetDB? -- Frédéric Jolliton SecurActive

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ODBC driver and config on the Mac?
by Robert Kosara 19 Aug '14

19 Aug '14

Hello, I’ve been trying to connect to MonetDB via ODBC on Mac OS X, without luck. I’m seeing the ODBC drivers in /usr/local/monetdb/lib/, but I’m confused that they are .so files and not .dylib. It looks like all the others are .dylib, and as far as I know that’s required so they can be loaded dynamically. I’ve tried using the .so files in the ODBC manager, but that has only made it crash. Has anybody used MonetDB with ODBC on the Mac? Can you perhaps show me your configuration? Thanks, Robert

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Table is not unique, corrupt catalog?
by Ali Salem 11 Aug '14

11 Aug '14

Hello all, Last night I imported 500M records into my fact table, it took around 19 hours, but it worked fine. I created my indexes afterwards with no issues as well. However, when I tried to access the rest of the tables in my database, I received the following error: table table_name is not unique, corrupt catalog? Any idea why this happened and how to fix it? Thank you.

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MonetDB partition by day
by Ali Salem 08 Aug '14

08 Aug '14

Hello all, I know MonetDB has window functions, but can I partition a table by day? If you can direct me to a link with examples, I'd appreciate it. Thanks

1 0

MEDIAN(double) not found
by Radovan Bičiště 08 Aug '14

08 Aug '14

Hello, We use MonetDB Jan2014-SP2. When I try MEDIAN function it simply says: MEDIAN: no such operator 'median(double)' [SQL State=22000] Am I missing something? I tried to execute section of 39_analytics.sql containing the MEDIAN function. It says MEDIAN function is already there. Thank you for any tips. Radovan Test Case: I took the sql from bug 2454: select median(id) from sys.tables; result: An error occurred when executing the SQL command: select median(id) from sys.tables MEDIAN: no such operator 'median(int)' [SQL State=22000] Execution time: 0.03s 1 statement failed.

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Connection Reset(mserver still alive?)
by Ali Salem 06 Aug '14

06 Aug '14

Hello, I have recently started using MonetDB for a BI project, and it's doing pretty well. However, I receive a connection reset error each time I run an ETL process (I use Pentaho PDI) to populate my dimensional schema. This error is reported by the MonetDB JDBC driver *Connection reset(mserver still alive?)* This usually happens after a random amount of time, 30 min, 45 min, 1 hour, etc. Any pointers related to this would be very helpful. Specs ------- Ubuntu 12.04 8 GB Ram 500 GB Space Pentaho PDI (community edition) Monetdb5 (installed using apt-get) Thank you.

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SIGSEGV during log flush
by Richard Hughes 01 Aug '14

01 Aug '14

Hello, Can I persuade a developer to help me out with bug 3422 [https://www.monetdb.org/bugzilla/show_bug.cgi?id=3422#c4]? I'm amassing an unhealthy collection of core dumps now (about one a day), and the latest is from Jan2014SP3 which I upgraded to last night. FWIW I'm no longer sure that I am looking at the same SIGSEGV as the one that the original bug reporter was talking about - of course I can create a new Bugzilla entry if it helps. This is our staging platform so I have the ability to run all sorts of custom builds or anything else that will help debug it, I'm just not sure where to start looking; I'd really appreciate some hints. Thanks for your help, Richard.

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Adding conditions slows query 1000x
by Dennis Pallett 31 Jul '14

31 Jul '14

Hi all, When I run the following query the results are computed extremely fast (within 5 ms): SELECT id_str, len,coordinates_x,coordinates_y FROM uk_neogeo_sorted WHERE coordinates_x >= 0.0 AND coordinates_x <= 22.499999996867977 LIMIT 100; However if I add additional conditions to the query so that it becomes the following: SELECT id_str,len,coordinates_x,coordinates_y FROM uk_neogeo_sorted WHERE coordinates_x >= 0.0 AND coordinates_x <= 22.499999996867977 AND coordinates_y >= 0.0 AND coordinates_y <= 61.60639636617352 LIMIT 100; The time it takes to compute the results is approximately 1000x bigger (i.e. 5 seconds). Clearly the additional conditions on the coordinates_y column is forcing MonetDB to take a different query strategy but I don't know how I can solve this. In Postgres I would make sure there is an index on the (coordinates_x, coordinates_y) column but this doesn't seem to have any effect with MonetDB. I've attached traces of both queries. There are approximately 11 million rows in the table. Can anyone tell me why there is such a huge difference in query execution time and how I can prevent it? Best regards, Dennis Pallett

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Announcement: New Jan2014-SP3 Bugfix release of MonetDB suite
by Sjoerd Mullender 31 Jul '14

31 Jul '14

The MonetDB team at CWI/MonetDB BV is pleased to announce the Jan2014-SP3 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <http://www.monetdb.org/>. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. Jan 2014-SP3 bugfix release Build Environment * Fix configure to continue without Python if the python binary is too old. This instead of always aborting configure if python happens to be too old. Bug Fixes * 3487: dead link to "Professional services" * 3500: MonetDB driver wants an empty string for SQLTables and SQLColumns API calls, where other drivers expect NULL * 3514: mserver5 crash due (assertion failure in gdk_select.c) * 3515: mserver5 crash due (assertion failure in gdk_bat.c) * 3519: Uppercase TRUE/FALSE strings cannot be converted to boolean values

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