users-list July 2015

users-list@monetdb.org

27 participants
28 discussions

by Martin Schwitalla

Hi, sorry that it took so long but I could test the patch and it didn`t seem to change anything. The trace looks the same and the performance didn`t improve. Regards, Martin

6 years, 11 months

possible monetdb catalogue corruption and how to recover from it?

by Ashish Kumar Singh

Hi List, We are seeing a situation with monetdb v11.17.17 "Jan2014-SP2” release where at the time of dropping table , data base got crashed. After that we are not able to drop this table. Any command to drop this table is returning with success but we can not create same table again as it complains about table exists/ in use. But when we try to select * from this table or do a count on this it does complains saying No Such Table exist. My hunch is somehow database catalogue got corrupted, what is recommended way to bring back database to good health after any such condition occurs? We have not tried restarting monetdb instance yet. Regards, Ashish Kumar Singh Mobile: +91-9972045095 Skype: toashishk(a)gmail.com

6 years, 11 months

What JDBC jar

by Vic

Hi, There are 3: http://dev.monetdb.org/downloads/Java/Oct2014-SP4 Which one should I use? Vic

7 years

MonetDB: bulk insert failed due to weird characters

by Tri Vuong

Hi, I'm using "COPY INTO" to insert some data into MonetDB. The csv that I'm copying from has some weird characters like \367\251\240 in some string fields and it broke the insertion. The error that I got is: !value from line x field y not inserted, expecting type clob Does anyone know how to get around this problem? The version I'm using is MonetDB Database Server Toolkit v1.1 (Oct2014-SP4). Thanks. -- Tri Vuong

7 years

Re: Monetdb-R integration

by Hannes Mühleisen

Hi Imad, I just noticed this, grouped aggregates using R need to consider the aggr_group implicit parameter. This vector denotes which group the entries in the input belong to. In your case, something like this should work: CREATE AGGREGATE "ttest2samples"(arg1 double, arg2 varchar(250)) RETURNS double LANGUAGE R { unlist(lapply(split(data.frame(arg1, arg2, stringsAsFactors=F), aggr_group), function(x) {t.test(arg1 ~ arg2, data=x)$p.value})) }; This first splits the input according to the grouping variables, then calculates the p-value for every group separately, and then returns a single result value for each group. select "2-Age","ttest2samplesStatistic"("9-Score", "4-Gender") as "stat", "ttest2samples"("9-Score", "4-Gender") as "pvalue" from "Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" group by "2-Age”; then results in +---------+--------------------------+--------------------------+ | 2-Age | stat | pvalue | +=========+==========================+==========================+ | [21-30] | -1.3224483820692825 | 0.18902257300165592 | | [10-20] | 0.15797419230807905 | 0.8781391200296775 | | > 30 | -2.636786922876647 | 0.011182421832548708 | +---------+--------------------------+--------------------------+ Sorry for the delay, Hannes On 09 Jul 2015, at 09:52, imad hajj chahine <imad.hajj.chahine(a)gmail.com> wrote: > > > Hi Hannes, > > Any update on the issue? > > Thank you. > > On Mon, Jun 22, 2015 at 4:18 PM, imad hajj chahine <imad.hajj.chahine(a)gmail.com> wrote: > ok thanks, if you want you can also test with this function (a one sample test that takes the second argument as simple double value): > > CREATE AGGREGATE "ttest1sample"(arg1 double, arg2 double) RETURNS double LANGUAGE R { t.test(arg1, arg2)$p.value }; > > select "2-Age", "ttest1sample"("9-Score",6.08963) from "Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where "2-Age" is not null group by "2-Age" > > On Mon, Jun 22, 2015 at 4:12 PM, Hannes Mühleisen <Hannes.Muehleisen(a)cwi.nl> wrote: > ok, reproduced issue. let me see why this only returns one row. > > > ----- Original Message ----- > From: "imad hajj chahine" <imad.hajj.chahine(a)gmail.com> > To: "Hannes Mühleisen" <Hannes.Muehleisen(a)cwi.nl> > Sent: Monday, June 22, 2015 3:10:55 PM > Subject: Re: Monetdb-R integration > > Sorry Hannes, you need to do a trim on "4-Gender" column as its the one > used in the test. > Sorry again its my fault. > > On Mon, Jun 22, 2015 at 3:42 PM, Hannes Mühleisen <Hannes.Muehleisen(a)cwi.nl> > wrote: > > > Did a trim() on the column but same error. There are three distinct values > > in that column. > > I get > > > > select distinct "2-Age" from > > "Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea”; > > +---------+ > > | 2-Age | > > +=========+ > > | [21-30] | > > | [10-20] | > > | > 30 | > > +————+ > > > > > > ----- Original Message ----- > > From: "imad hajj chahine" <imad.hajj.chahine(a)gmail.com> > > To: "Hannes Mühleisen" <Hannes.Muehleisen(a)cwi.nl> > > Sent: Monday, June 22, 2015 2:36:43 PM > > Subject: Re: Monetdb-R integration > > > > Hi Hannes, > > > > Please let me know if you need more information from my side. > > > > Regards > > > > On Fri, Jun 19, 2015 at 11:38 AM, imad hajj chahine < > > imad.hajj.chahine(a)gmail.com> wrote: > > > > > Hi Hannes, > > > > > > This error is due that the "2-age" column has more than 2 distinct > > values, > > > there is a space after some values. can you run a trim on the "2-Age" and > > > then try it again. > > > > > > As for the vector thing, I didnt get the point, shouldnt the db engine > > > split the data into vectors and feed the aggregate function which return > > > one data point? > > > > > > Thanks > > > > > > On Fri, Jun 19, 2015 at 11:12 AM, Hannes Mühleisen < > > > Hannes.Muehleisen(a)cwi.nl> wrote: > > > > > >> I am running attached script, which I pieced together from your emails. > > >> This does not run, it produces the following error: > > >> > > >> Error running R expression. Error message: Error in t.test.formula(arg1 > > ~ > > >> arg2) : > > >> grouping factor must have exactly 2 levels > > >> Calls: as.data.frame -> <Anonymous> -> t.test -> t.test.formula > > >> > > >> > > >> > > >> > > >> In general, for aggregations, the R code needs to return a vector with a > > >> single entry for each group. > > >> > > >> > > >> Best, > > >> > > >> Hannes > > >> > > >> > > >> > > >> > > >> > On 19 Jun 2015, at 09:44, imad hajj chahine < > > >> imad.hajj.chahine(a)gmail.com> wrote: > > >> > > > >> > Thanks, if you need more information from my side let me know. > > >> > > > >> > Also can you answer me on the following when i use 2 functions one to > > >> retrieve Pvalue and one for the stat value: > > >> > Am I doing the correct way to retrieve the stat and p-value, is the > > >> ttest get executed twice in this case? is there a more optimal way > > where i > > >> can retrieve both information. > > >> > > > >> > On Fri, Jun 19, 2015 at 10:39 AM, Hannes Mühleisen < > > >> Hannes.Muehleisen(a)cwi.nl> wrote: > > >> > Looking into this at the moment. > > >> > > > >> > > On 16 Jun 2015, at 09:56, Dimitar Nedev < > > >> dimitar.nedev(a)monetdbsolutions.com> wrote: > > >> > > > > >> > > Hannes, do you know if the STD_DEV is the issue there or if the > > >> queries should actually yield different results? > > >> > > > > >> > > Dimitar > > >> > > > > >> > >> On 2015-Jun-15, at 13:28 , imad hajj chahine < > > >> imad.hajj.chahine(a)gmail.com> wrote: > > >> > >> > > >> > >> Hi, > > >> > >> > > >> > >> Shouldn't we have the same result from running the first query and > > >> the second query? > > >> > >> after all its an aggregate function and should return the test for > > >> each group. > > >> > >> > > >> > >> I checked that monetdb had problem with running group by with > > >> statistics functions like STD_DEV, are these 2 issues related? > > >> > >> > > >> > >> Thank you. > > >> > >> > > >> > >> > > >> > >> > > >> > >> > > >> > >> On Mon, Jun 15, 2015 at 1:52 PM, Dimitar Nedev < > > >> dimitar.nedev(a)monetdbsolutions.com> wrote: > > >> > >> Hi Imad, > > >> > >> > > >> > >> Here is the output I got from running the queries. Note, this might > > >> not be entirely representative since I did clean-up some data before > > >> loading it. > > >> > >> > > >> > >> sql>select "2-Age", "tone"."ttest2"("9-Score",6.08963) from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where > > >> "2-Age" is not null group by "2-Age"; > > >> > >> +---------+--------------------------+ > > >> > >> | 2-Age | L1 | > > >> > >> +=========+==========================+ > > >> > >> | [10-20] | 0.89311103869734754 | > > >> > >> +---------+--------------------------+ > > >> > >> 3 tuples (3.218ms) > > >> > >> > > >> > >> sql>select '[10-20]' as "2-Age","tone"."ttest2"("9-Score",6.08963) > > >> from "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" > > where > > >> "2-Age" = '[10-20]' > > >> > >> more>union all > > >> > >> more>select '[21-30]' as "2-Age","tone"."ttest2"("9-Score",6.08963) > > >> from "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" > > where > > >> "2-Age" = '[21-30]' > > >> > >> more>union all > > >> > >> more>select '[> 30]' as "2-Age","tone"."ttest2"("9-Score",6.08963) > > >> from "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" > > where > > >> "2-Age" = '> 30'; > > >> > >> +---------+--------------------------+ > > >> > >> | 2-Age | L1 | > > >> > >> +=========+==========================+ > > >> > >> | [10-20] | 0.14150742355349472 | > > >> > >> | [21-30] | 0.32872830865003566 | > > >> > >> | [> 30] | 0.37127075363219841 | > > >> > >> +---------+--------------------------+ > > >> > >> 3 tuples (8.825ms) > > >> > >> > > >> > >> > > >> > >> sql>select "tone"."ttest2samplesStatistic"("9-Score", "4-Gender") > > as > > >> "stat", "tone"."ttest2samples"("9-Score", "4-Gender") as "pvalue" from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" group > > by > > >> "2-Age"; > > >> > >> +--------------------------+--------------------------+ > > >> > >> | stat | pvalue | > > >> > >> +==========================+==========================+ > > >> > >> | -2.1588506639013736 | 0.032555033970368859 | > > >> > >> +--------------------------+--------------------------+ > > >> > >> 1 tuple (13.287ms) > > >> > >> > > >> > >> > > >> > >> I dropped the aggregate with: > > >> > >> sql>DROP AGGREGATE "tone"."ttest2samplesStatistic"; > > >> > >> operation successful (2.049ms) > > >> > >> > > >> > >> > > >> > >> Best regards, > > >> > >> Dimitar > > >> > >> > > >> > >>> On 2015-Jun-12, at 00:46 , imad hajj chahine < > > >> imad.hajj.chahine(a)gmail.com> wrote: > > >> > >>> > > >> > >>> Thank you Dimitar, > > >> > >>> > > >> > >>> I was using Squirrel to connect from my host machine to the VM. > > >> > >>> > > >> > >>> Now when I connect using SSH-client and run the short group by > > >> query it works but the result is not similar to the union queries (PS: i > > >> also run it in the VM direclty and had the same result) > > >> > >>> > > >> > >>> > > >> > >>> +---------+--------------------------+ > > >> > >>> | 2-Age | pval | > > >> > >>> +=========+==========================+ > > >> > >>> | [21-30] | 0.99996611809271041 | > > >> > >>> +---------+--------------------------+ > > >> > >>> 3 tuples (2.638ms) > > >> > >>> > > >> > >>> > > >> > >>> What i am trying to achieve is to run a one sample ttest for all > > >> the age categories, and it seems that the group by is ignored. > > >> > >>> > > >> > >>> I have also created 2 functions for the two sample ttest: > > >> > >>> > > >> > >>> CREATE AGGREGATE "tone"."ttest2samples"(arg1 double, arg2 > > >> varchar(250)) RETURNS double LANGUAGE R { t.test(arg1 ~ arg2)$p.value }; > > >> > >>> CREATE AGGREGATE "tone"."ttest2samplesStatistic"(arg1 double, arg2 > > >> varchar(250)) RETURNS double LANGUAGE R { t.test(arg1 ~ arg2)$statistic > > }; > > >> > >>> > > >> > >>> select "tone"."ttest2samplesStatistic"("9-Score", "4-Gender") as > > >> "stat", "tone"."ttest2samples"("9-Score", "4-Gender") as "pvalue" from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" group > > by > > >> "2-Age" > > >> > >>> > > >> > >>> Am I doing the correct way to retrieve the stat and p-value, is > > the > > >> ttest get executed twice in this case? is there a more optimal way > > where i > > >> can retrieve both information. Please note that I also have the same > > >> grouping issue as before. > > >> > >>> > > >> > >>> Do you have the same behavior, or I am missing something in the > > >> creation of these functions. > > >> > >>> > > >> > >>> A final question, how do u drop a R function? i am trying to > > >> execute the following: > > >> > >>> drop all function "tone"."ttest2samplesStat" > > >> > >>> > > >> > >>> > > >> > >>> Thank you. > > >> > >>> > > >> > >>> > > >> > >>> > > >> > >>> On Thu, Jun 11, 2015 at 11:28 PM, Dimitar Nedev < > > >> dimitar.nedev(a)monetdbsolutions.com> wrote: > > >> > >>> Hi Imad, > > >> > >>> > > >> > >>> Hannes asked me to look at your issue with the MonetDB-R VM. > > >> > >>> > > >> > >>> I loaded the data and ran the queries you mentioned, but I did not > > >> encounter any issues. This holds for both the short and the union > > queries. > > >> I am also not familiar with the issue you report, nor its cause. At this > > >> time I think it is local to your instance. If you can export your db, or > > >> re-load the data, I would recommend you to create a new instance with a > > >> fresh image and try again. If you import the image as a new VM instance, > > >> you can keep your old one around as well. > > >> > >>> > > >> > >>> Please note that during the test: > > >> > >>> - I ran as the admin (monetdb) user, as the one created default on > > >> the VM image cannot create new schemas. > > >> > >>> - I have to clean the data a bit up to load it, removing dozen > > >> lines or so. > > >> > >>> - Renamed ttest1 to ttest2 to match the queries. > > >> > >>> > > >> > >>> Best regards, > > >> > >>> Dimitar > > >> > >>> > > >> > >>>>>>>>> Begin forwarded message: > > >> > >>>>>>>>> > > >> > >>>>>>>>> From: imad hajj chahine <imad.hajj.chahine(a)gmail.com> > > >> > >>>>>>>>> Subject: Re: Monetdb-R integration > > >> > >>>>>>>>> Date: 10 Jun 2015 10:11:48 CEST > > >> > >>>>>>>>> To: Hannes Mühleisen <Hannes.Muehleisen(a)cwi.nl> > > >> > >>>>>>>>> > > >> > >>>>>>>>> Hi, > > >> > >>>>>>>>> > > >> > >>>>>>>>> I am using the virtual box provided from > > >> https://www.monetdbsolutions.com/solutions/cloud/vm: > > >> > >>>>>>>>> OS:linux version 3.10.0-123.9.3.el7.x86_64 ( > > >> builder(a)kbuilder.dev.centos.org) > > >> > >>>>>>>>> Monetdb: V1.7: (Oct2014-SP1) > > >> > >>>>>>>>> R: 3.1.2 (2014-10-31) > > >> > >>>>>>>>> > > >> > >>>>>>>>> > > >> > >>>>>>>>> > > >> > >>>>>>>>> create table > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" > > ("Consumer > > >> Number" INTEGER,"1-Disloyalty" varchar(250),"2-Age" > > varchar(250),"3-Amount > > >> transferred" INTEGER,"4-Gender" varchar(250),"5-Citiz enship" > > >> varchar(250),"6- Profession" varchar(250),"7-City" varchar(250),"8-1 NC > > >> Billboard" varchar(250),"8-2 NC Friends" varchar(250),"8-3 NC Magazine" > > >> varchar(250),"8-4 NC Others" varchar(250),"9-Score" decimal(18,3),"10- > > Type > > >> of operation" varchar(250),"11-1 Welcoming" INTEGER,"11-2 Waiting time" > > >> INTEGER,"11-3 Time to finish request" INTEGER,"11-4 Fees" INTEGER,"11-5 > > >> Courtesy of employees" INTEGER,"11-6 Branch layout" INTEGER,"11-7 > > Attention > > >> to special requests" INTEGER,"12- Total time for service" > > >> decimal(18,3),"13- Distance from POS" decimal(18,3),"14- Weight" > > INTEGER) > > >> > >>>>>>>>> > > >> > >>>>>>>>> COPY offset 2 INTO > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" FROM > > >> > > '/home/App_Data/TestingDataSimple_2003_Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea.csv' > > >> USING DELIMITERS ',','\n','"'; > > >> > >>>>>>>>> > > >> > >>>>>>>>> Thanks > > >> > >>>>>>>>> > > >> > >>>>>>>>> On Wed, Jun 10, 2015 at 10:50 AM, Hannes Mühleisen < > > >> Hannes.Muehleisen(a)cwi.nl> wrote: > > >> > >>>>>>>>> Hello Imad, > > >> > >>>>>>>>> > > >> > >>>>>>>>> which version of MonetDB and R are you using? Which > > operating > > >> system? > > >> > >>>>>>>>> > > >> > >>>>>>>>> Can you please also include the commands you used to load > > >> your CSV into MonetDB/ create the table? > > >> > >>>>>>>>> > > >> > >>>>>>>>> Thanks, > > >> > >>>>>>>>> > > >> > >>>>>>>>> Hannes > > >> > >>>>>>>>> > > >> > >>>>>>>>>> On 10 Jun 2015, at 00:25, imad hajj chahine < > > >> imad.hajj.chahine(a)gmail.com> wrote: > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> Hi Hannes, > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> I am testing Monetdb-R integration to do some statistical > > >> test, i followed the tutorial you posted on youtube and i have created > > the > > >> following function: > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> CREATE AGGREGATE "tone"."ttest1"(arg1 double, arg2 double) > > >> RETURNS double LANGUAGE R { t.test(arg1, arg2)$p.value }; > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> this function will basically do a one sample t-test. > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> I have loaded the sample attached file into a demo database > > >> and trying to run the following query: > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> select "2-Age", "tone"."ttest2"("9-Score",6.08963) from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where > > >> "2-Age" is not null group by "2-Age" > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> The following error happened > > >> > >>>>>>>>>> Error: protocol violation: unexpected line in data block: . > > >> > >>>>>>>>>> SQLState: M0M10 > > >> > >>>>>>>>>> ErrorCode: 0 > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> alternatively i managed to have the intended result by > > >> running this query: > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> select '[10-20]' as > > >> "2-Age","tone"."ttest2"("9-Score",6.08963) from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where > > >> "2-Age" = '[10-20]' > > >> > >>>>>>>>>> union all > > >> > >>>>>>>>>> select '[21-30]' as > > >> "2-Age","tone"."ttest2"("9-Score",6.08963) from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where > > >> "2-Age" = '[21-30]' > > >> > >>>>>>>>>> union all > > >> > >>>>>>>>>> select '[> 30]' as > > >> "2-Age","tone"."ttest2"("9-Score",6.08963) from > > >> "tone"."Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea" where > > >> "2-Age" = '> 30' > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> any help or guidance is appreciated. > > >> > >>>>>>>>>> Thank you. > > >> > >>>>>>>>>> > > >> > >>>>>>>>>> > > >> > > <TestingDataSimple_2003_Marketing_Loyalty_4700298d-9862-40b3-9028-b0f15dab9dea.csv> > > >> > >>>>>>>>> > > >> > >>>>>>>>> > > >> > >>>>>>>> > > >> > >>>>>>> > > >> > >>>>>> > > >> > >>>>> > > >> > >>>> > > >> > >>> > > >> > >> > > >> > >> > > >> > > > > >> > > > >> > > > >> > > >> > > >> > > > > > > >

7 years

Problem: Relational query without result

by Martin Schwitalla

Hi, I have a problem. I have tested on MonetDB 11.19.9 a query and wanted to test the same query on a better Workstation and installed MonetDB 11.19.15. But now I get every time the message „realtional query without result“ when I try to run the query. Can anybody help? Kind regards, Martin

7 years

How to work with MAL-statements?

by Martin Schwitalla

Hello, to improve execution time I wanted to work with MAL-statements, so that I could directly control the query plan. But it seems that the generated MAL-Plans don`t „just work“ when I type them. I tried to get used to MAL with the simple query „select * from table;“. This got me the following plan: function user.s1_1{autoCommit=true}():void; barrier X_59 := language.dataflow(); X_2 := sql.mvc(); X_3:bat[:oid,:oid] := sql.tid(X_2,"sys","diseases"); X_6:bat[:oid,:int] := sql.bind(X_2,"sys","diseases","id",0); (X_9,r1_9) := sql.bind(X_2,"sys","diseases","id",2); X_12:bat[:oid,:int] := sql.bind(X_2,"sys","diseases","id",1); X_14 := sql.delta(X_6,X_9,r1_9,X_12); X_15 := algebra.leftfetchjoin(X_3,X_14); X_23:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","name",0); (X_25,r1_25) := sql.bind(X_2,"sys","diseases","name",2); X_27:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","name",1); X_28 := sql.delta(X_23,X_25,r1_25,X_27); X_29 := algebra.leftfetchjoin(X_3,X_28); X_16:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","short_name",0); (X_18,r1_18) := sql.bind(X_2,"sys","diseases","short_name",2); X_20:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","short_name",1); X_21 := sql.delta(X_16,X_18,r1_18,X_20); X_22 := algebra.leftfetchjoin(X_3,X_21); language.pass(X_3); exit X_59; X_30 := sql.resultSet(3,1,X_15); sql.rsColumn(X_30,"sys.diseases","id","int",32,0,X_15); sql.rsColumn(X_30,"sys.diseases","short_name","varchar",255,0,X_22); sql.rsColumn(X_30,"sys.diseases","name","varchar",255,0,X_29); X_40 := io.stdout(); sql.exportResult(X_40,X_30); end s1_1; But when I try to run this statements I get the following error: MAPI = (monetdb) /tmp/.s.monetdb.5250 QUERY = end s1_1; ERROR = !TypeException:user.s1_1[7]:'sql.delta' undefined in: X_14:any := sql.delta(X_6:bat[:oid,:int], X_9:bat[:oid,:oid], r1_9:bat[:oid,:any], X_12:bat[:oid,:int]) !ERROR: MSresetVariablescould not allocate space for What am I`m missing that it doesn`t work? Kind regards, Martin

7 years

QUANTILE( colname , 0 ) and QUANTILE( colname , 1 ) problem

by Anthony Damico

hi monetdb team, i am getting errors below on data i can't share. before i spend a bunch of time trying to create a reproducible example for this: i've confirmed that MIN and MAX both do work on this column, and also that QUANTILE works with 0.01 thru 0.99 on this column. is there a reason QUANTILEs of 0 and 1 don't simply call MIN and MAX? thanks! Error in .local(conn, statement, ...) : Unable to execute statement 'SELECT QUANTILE( tot_pay , 0 ) FROM acons WHERE yr = 2013 AND ( dattyp1 = 1 OR dattyp2 = 1 OR dattyp...'. Server says 'overflow in conversion of 43553.818965373482 to bte.' [#22003]. > > unwtd_pct <- dbGetQuery( db , paste( "SELECT QUANTILE( tot_pay , 1 ) FROM acons" , where_clause ) ) Error in .local(conn, statement, ...) : Unable to execute statement 'SELECT QUANTILE( tot_pay , 1 ) FROM acons WHERE yr = 2013 AND ( dattyp1 = 1 OR dattyp2 = 1 OR dattyp...'. Server says 'overflow in conversion of 43553.818965373482 to bte.' [#22003]. >

7 years

CAST and CONVERT string to int

by Dennis Wiest

Hello, I have a question for the Operation Cast and CONVERT. I have the following table and wants to run this query. select * from value v2 WHERE v2.xpath_id = 378 AND v2.value BETWEEN 1000 AND 2000 LIMIT 10; This provides me with the wrong result because v2.value is a textfield. Now I wanted to with the following query to fix this problem, but I get an error. Is it at all possible to the cast or convert? select * from value v2 WHERE v2.xpath_id = 378 AND CAST(CAST(v2.value AS float)AS integer) > 1000 LIMIT 10; conversion of string 'RNAV' to type dbl failed. But this one Works select CAST(CAST(v2.value AS float)AS integer) from value v2 WHERE v2.xpath_id = 378 LIMIT 10; The problem is, "value" must be a text field, "value" can take all possible values. CREATE TABLE value ( id int NOT NULL AUTO_INCREMENT, element_id int NOT NULL, xpath_id int NOT NULL, value text, PRIMARY KEY (id) ); Thanks 4 Help Greetings Dennis ________________________________ Avitech GmbH Principal Office: Bahnhofplatz 1 | 88045 Friedrichshafen | Germany Court Registration: Amtsgericht Ulm | HRB 728293 Gesch?ftsf?hrer/Managing Director: Antonio Maria Gonzalez Gorostiza VAT No.: DE223719716 http://avitech.aero

7 years

combined conditions in user defined function made monetdb exited.

by integrity

Dear experts, I tried to create an function in monetdb, but the first one successful, the second one successful, but the combo failed. create function neighbor19() returns table (ra_avg double) begin declare table uzone (id bigint, ra_avg double); insert into uzone select id, ra_avg from uniquecatalog11; return table( select ra_avg from uzone as u0 where id between 10 and 20 ); end; successful. create function neighbor20() returns table (ra_avg double) begin declare table uzone (id bigint, ra_avg double); insert into uzone select id, ra_avg from uniquecatalog11; return table( select ra_avg from uzone as u0 where ra_avg between 10 and 20 ); end; successful. create function neighbor30() returns table (ra_avg double) begin declare table uzone (id bigint, ra_avg double); insert into uzone select id, ra_avg from uniquecatalog11; return table( select ra_avg from uzone as u0 where id between 10 and 20 and ra_avg between 10 and 20 ); end; failed with monetdb exited. in merovingian.log: 2015-07-19 13:34:36 MSG merovingian[25753]: database 'gwacdb' (633) was killed by signal SIGSEGV I tried on default and Jul2015 branch, all the same with each other. Any help or hints are appreciated! Best, Meng

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