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user defined is_numeric ( check if string is numeric ) and is_date(if string is valid date ) sql function for monetdb
by Shivanandan Gupta 09 Jun '15

09 Jun '15

Hi Team, I was looking for is_numeric() and is_date() function in monetdb but couldn't find it. So I have written it ( there will be many ways to do it , I am sharing the way I implemented ) . This will help other users in the group. #################################################################### IS NUMERIC function #################################################################### create function is_numeric (value varchar(100)) returns int begin declare isnumeric int; set isnumeric = length(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(value,'','0'),',',''),'1',''),'2',''),'3',''),'4',''),'5',''),'6',''),'7',''),'8',''),'9',''),'0','') ); if (isnumeric>0) then return 0; else return 1; end if; end; #################################################################### IS DATE function #################################################################### create function is_date (value varchar(100)) returns int begin declare is_date int; set is_date = case when SUBSTRING(value,7,4) BETWEEN '1900' AND '2100' then case when SUBSTRING(value,1,2) BETWEEN '01' AND '12' then case when SUBSTRING(value,4,2) BETWEEN '01' AND (CASE WHEN SUBSTRING(value,1,2) in('01','03','05','07','08','10','12') AND SUBSTRING(value,4,6) BETWEEN '01' AND '31' THEN '31' ELSE CASE WHEN SUBSTRING(value,1,2) in ('04','06','09','11') AND SUBSTRING(value,4,6) BETWEEN '01' AND '30' THEN '30' ELSE CASE WHEN (SUBSTRING (value,1,2) in ('02') ) AND MOD(SUBSTRING(value,7,4),400)=0 OR MOD(SUBSTRING(value,7,4),4)=0 THEN '29' ELSE '28' END END END) then 1 ELSE 0 END else 0 END else 0 END ; if (is_date=0) then return 0; else return 1; end if; end; -- Cheers, Shivanandan Gupta

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possible to add a search box?
by Anthony Damico 09 Jun '15

09 Jun '15

https://www.monetdb.org/mailman/listinfo/users-list https://www.monetdb.org/mailman/listinfo something like R has here http://tolstoy.newcastle.edu.au/R/

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How to install the MonetDB as a Windows Service
by fadila.mumbasic＠uniserv.com 05 Jun '15

05 Jun '15

Hi, is there any way to install the MonetDB as a Windows Service? Thanks! Regards, Fadila Mumbasic

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Setting up ODBC driver on Linux (Ubuntu 14.04)
by Dan Bartow 05 Jun '15

05 Jun '15

All - Thanks in advance for the help. Im trying to set up just the ODBC driver on a Linux client to connect to my MonetDB instance which is running on another host. I should probably just ask the simple question first, which is "is there any documentation somewhere, or can someone tell me some steps to do this easily?". I wasn't able to find anything instructing on how to do just that. Ive done the following manually, but if there is a documented way, or a better way, please point me in the right direction. If I try to test my connection with isql, this is what I see: isql -v MonetDB [08001][unixODBC][MonetDB][ODBC Driver 11.19.11]Client unable to establish connection [ISQL]ERROR: Could not SQLConnect All of the obvious stuff has been checked - the server is definitely up and running and I can connect to it via JDBC via SQLWorkbench, I can use mclient on both the db host as well as this Ubuntu box Im trying to connect from and mclient connects just fine. I can telnet to the host on port 50000... etc. Any ideas why I might be getting this error? To set up the ODBC driver, I did this: 1) I copied libMonetODBC.so and libMonetODBCs.so from the libmonet-client-odbc package into /usr/lib/x86_64-linux-gnu/odbc 2) I added this to /etc/odbcinst.ini [MonetDB] Description = MonetDB Driver Driver = libMonetODBC.so Setup = libMonetODBCs.so UsageCount = 2 3) I added this DSN to /etc/odbc.ini [MonetDB] Description = Connection for MonetDB Driver = MonetDB Database = voc Servername = 172.17.0.204 User = voc Password = voc Port = 50000 Thank you very much! - - Dan *Dan Bartow* [Product Design] --------------------------------------------------------- *SOASTA* www.linkedin.com/in/danbartow www.twitter.com/perfdan This email and any attachments thereto may contain private, confidential and privileged material for the sole use of the intended recipient. Any review, copying or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto.

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should the SAMPLE command produce random results?
by Anthony Damico 01 Jun '15

01 Jun '15

# here's a reproducible example using R code to repeat the sampling 1000 times. in both SAMPLE examples below, the database pulls the 2 less than 200 times out of 1000. shouldn't it be close to 500 out of 1000? this seems not random (misleading to users?) sorry if i'm misunderstanding something.. thank you!! # start in an empty directory somewhere # setwd( "C:/My Directory/MonetDB" ) # # # # # # # # # START OF SETUP - no editing required library(MonetDB.R) batfile <- monetdb.server.setup( database.directory = paste0( getwd() , "/MonetDB" ) , monetdb.program.path = ifelse( .Platform$OS.type == "windows" , "C:/Program Files/MonetDB/MonetDB5" , "" ) , dbname = "test" , dbport = 50000 ) pid <- monetdb.server.start( batfile ) db <- dbConnect( MonetDB.R() , "monetdb://localhost:50000/test" , wait = TRUE ) # # # END OF SETUP dbGetQuery( db , "SELECT 1 AS col UNION ALL SELECT 2 AS col" ) out <- NULL for ( i in 1:1000 ){ out <- c( out , dbGetQuery( db , "SELECT * FROM ( SELECT 1 AS col UNION ALL SELECT 2 AS col ) AS temp SAMPLE 0.5" ) ) } # not random table( unlist( out ) ) # 1 2 # 880 120 out <- NULL for ( i in 1:1000 ){ out <- c( out , dbGetQuery( db , "SELECT * FROM ( SELECT 1 AS col UNION ALL SELECT 2 AS col ) AS temp SAMPLE 1" ) ) } # ALSO not random table( unlist( out ) ) # 1 2 # 856 144

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a few performance improvement questions
by Anthony Damico 29 May '15

29 May '15

hi, i've been running some pretty big queries on a few tables (total of 900 million records) on a 64GB windows machine and i'm curious if anyone might provide advice about whether any of these strategies are computationally expensive? i am maxing out my available RAM in my queries a lot, and at the point it hits that ceiling, the computation starts dragging. here's my pseudo-sql that displays the kinds of commands i've been running. thanks! ============ (a) i am conducting a left join where not all records match. the non-matching records need to be zeroes in general, is this the least computationally demanding way to get an average amount per person, including the zeroes? SELECT AVG( sum_amount ) AS avg_amt_per_person FROM ( SELECT person_id , SUM( CASE WHEN amount IS NULL THEN 0 ELSE amount END ) AS sum_amount FROM ( ( SELECT person_id FROM person_table ) AS a LEFT JOIN ( SELECT person_id , amount FROM amount_table ) AS b ON a.person_id = b.person_id ) AS temp_table GROUP BY person_id ) ; ============ (b) i am on windows (so no strptime) and i have dates in either a mm/dd/yy format but some january thru september are m/dd/yy (i.e. the month can either be one or two digits). i am just calculating the month as part of my query on-the-fly. is it foolish of me not to add a new, permanent column to the data set? i don't have a good sense of whether this segment slows down my query by a lot. it is one of my join/merge variables. CAST( CASE WHEN SUBSTRING( some_date , 2 , 1 ) = '/' THEN SUBSTRING( some_date , 1 , 1 ) ELSE SUBSTRING( some_date , 1 , 2 ) END AS DOUBLE ) AS some_month ============ (c) i have a three tables that have the same structure that get LEFT JOINed onto my main table. so right now i am doing something like-- main_table LEFT JOIN second_table LEFT JOIN third_table LEFT JOIN fourth_table is it smarter fo me to do this instead? -- CREATE TABLE stacked_table FROM second_table UNION ALL third_table UNION ALL fourth_table main_table LEFT JOIN stacked_table

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is bugzilla down?
by Anthony Damico 27 May '15

27 May '15

https://www.monetdb.org/bugzilla/ connection times out -- from computers in three countries.

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Permission Issues
by Raffael Marty 27 May '15

27 May '15

I have a table called ip_range with an inet field (ip). I do the following query: select * from ip_range where ip << inet '10.0.0.0/8’ SELECT: no such binary operator 'left_shift(inet,inet)' Which results in an error. This is by using a non system user. If I create the same table as moentdb user and do the same query, it works as intended. Am I missing something with regards to permissions? Running 11.19.11-20150 on Ubuntu. Thanks Raffael To reproduce: create table test (a inet); insert into test (a) values ('10.0.0.1’); select * from test where a << inet '10.0.0.0/8’; — Visual Analytics Workshop at #BlackHat US in August: http://bit.ly/1FN1W5e Raffael Marty ceo @ pixlcloud http://pixlcloud.com @raffaelmarty http://raffy.ch

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Picky SQL sytnax
by Raffael Marty 26 May '15

26 May '15

I am having some issues with the SQL syntax in MonetDB. Is it just really picky or am I doing something that is not SQL99 compatible? Couple examples: This query works: select source_address, count(distinct destination_port) as distcount from flows group by source_address having count(distinct destination_port)>1 limit 10; The following query doesn’t work. I am just trying to use the AS keyword to make things a bit more readable. select source_address, count(distinct destination_port) as distcount from flows group by source_address having distcount>1 limit 10; SELECT: identifier 'distcount’ unknown I had numerous other issues where little things like quotes and such made a difference. For example, creating a table would not work like this: CREATE TABLE foo (range text); syntax error, unexpected RANGE, expecting FOREIGN or PRIMARY or UNIQUE in: "create table foo (range" This works: CREATE TABLE foo (“range” text); Third example: (I could never get this working - tried removing the quotes, which made things worse) sql>INSERT INTO ranges ("range", "title", "external", "description", "routeadvertised", "X", "Y", "Z", "N", "M", "O", "P", "Q", "R", "S", "T", "U", "V", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J" ) VALUES ('0.0.0.0/0', 'IPv4', , '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', 0, 0, '', '', '', '', '', 1, '1', '' ); syntax error, unexpected ',' in: "insert into ranges ("range", "title", "external", "description", "routeadvert" Is there a statement length restriction? Same happens whether I use the mclient or go through Python code. I am running version 11.19.11-20150 Thanks so much! Raffael — Visual Analytics Workshop at #BlackHat US in August: http://bit.ly/1FN1W5e Raffael Marty ceo @ pixlcloud http://pixlcloud.com @raffaelmarty http://raffy.ch

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Announcement: New Oct2014-SP3 Bugfix release of MonetDB suite
by Sjoerd Mullender 26 May '15

26 May '15

The MonetDB team at CWI/MonetDB BV is pleased to announce the Oct2014-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/>. Oct 2014-SP3 bugfix release Build Environment * We now also create debug packages for Debian and Ubuntu. MonetDB Common * Replaced the rangejoin implementation with one that uses imprints if it can. Bug Fixes * 3466: UPDATE statements fails with "GDKerror: MT_mremap() failed" * 3602: Surprising overload resolution of generate_series * 3613: SQL data dictionary contains columns names which are also special keywords. This causes unexpected/unneeded SQL query errors * 3645: Network address operators such as << and <<= do not work * 3647: missing BAT for a column leads to crash in gtr_update_delta * 3648: memory corruption on unclean connection shutdown with local temporary tables * 3650: Naming of persistent BATs is fragile * 3653: PREPARE crashes mserver if unbound variable is function parameter * 3655: SQL WHERE -1 in (-1) issue? * 3656: error message after calling fitsload() * 3660: Incorrect Results for Comparison Operators on inet Datatype * 3661: Ship debug symbols for pre-built binaries * 3662: UPDATE row with row value constructor crashes monetdb server * 3663: Incorrect result ROW_NUMBER in subquery * 3664: SQLstatementIntern missing parameter when using jsonstore * 3665: inter-session starvation issue, particularly affects sys.queue * 3666: casting text column to inet truncating text column and resulting inet for first occurrence only * 3667: insert of negative value for oid column aborts mserver5 process with assertion failure * 3669: ALTER TABLE <tbl_nm> ADD CONSTRAINT <tbl_uc1> UNIQUE (col1, col2, col3) causes Assertion failure and abort * 3671: ODBC-Access on Windows 2012 does not work - E_FAIL * 3672: libbat_la-gdk_utils.o: relocation R_X86_64_PC32 against `MT_global_exit' can not be used when making a shared object * 3676: merovingian hangs trying to exit * 3677: Crash in BATgroup_internal (caused by 87379087770d?) * 3678: Ruby driver installation ignores prefix * 3680: Prepared statements fail on execution with message 'Symbol type not found' * 3684: Wrong query result set WHERE "IS NULL" or "NOT IN" clauses uses in combination with ORDER, LIMIT and OFFSET * 3687: 'bat.insert' undefined * 3688: Crash at exit (overrun THRerrorcount?) * 3689: No more connections accepted if a single client misbehaves * 3690: find_fk: Assertion `t && i' failed. * 3691: conversion of whitespaces string to double or float is accepted without an error during insert * 3693: algebra.join undefined (caused by non-existing variables in the plan) * 3696: Inconsistent behavior between dbl (SQL double) and flt (SQL real) data types and across platforms * 3697: mserver5[26946]: segfault at 0 ip 00007f3d0e1ab808 sp 00007f3cefbfcad0 error 4 in lib_sql.so[7f3d0e180000+16c000] * 3699: segfault again! (during last week I found 3 segfault bugs already) * 3703: INSERT INTO a MERGE TABLE crashes mserver5 * 3704: Unknown identifier from subquery * 3705: Assertion failure in rel_bin.c:2274: rel2bin_project: Assertion `0' failed. * 3706: Assertion failure in gdk_bat.c: BATassertHeadProps: Assertion `!b->H->sorted || cmp <= 0' failed. * 3709: "BATproject: does not match always" on abusive use of ALTER TABLE SET READ ONLY

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