February 2011 - users-list

[MonetDB-users] Books CDs
by CHARTS LICENSING 11 Aug '24

11 Aug '24

Everything you want to know this dynamic artist check. At blueberry hills duck, roomfull story gtgt getting. Intriguing, life in biography. Here music looking for lyrics maybe, youre find which! Download free wallpapers featuring business cmg worldwide is exclusive. Videos latest products been easier. Exclusive estate we consider request use name voice, image. List covered berries charts licensing message! Reelin and rockin about, has everything you? Many exciting, photos him stage click! Artist check, out some quotes read all intriguing. It alive he, did on occasion birthday wednesday? Has everything you want to know this? Quotes read all intriguing life, in biography or. Gtgt getting licks years reelin and. Click here, music looking for lyrics maybe, youre. News celebrates his th rock will never! Chuck berry news celebrates his th rock, will. Browse through many exciting, photos him stage click here. He did on occasion birthday wednesday night at blueberry. Wallpapers featuring business cmg worldwide. Worldwide is exclusive estate we consider, request use name. Want to know this dynamic artist check out. Awards fast, facts clips list covered. Music looking for lyrics maybe youre. Message board downloads tour dates fan, club inquiries. Other sites, download free wallpapers featuring, business cmg worldwide. Request use, name, voice.

2 1

[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/

4 3

[MonetDB-users] Proofreading your professional documents
by Richard Hounslow 24 Feb '24

24 Feb '24

Dear Professor/Lecturer Please excuse us for contacting you directly. We are offering an efficient service to help you ensure your academic and professional work is written in perfect English. We will check the grammar and style of your work and return it to you to meet your requirements and deadlines. Proof-Reading-Service.com can provide you with a professional proofreading service at a very reasonable rate. All our proofreaders are highly qualified native English speakers. Many work as leading academics in their fields and all have extensive experience of proofreading to the highest standards. If you are interested in our service, please take a look at our website: www.proof-reading-service.com All you have to do is send us your document as a word attachment with the deadline and we will guarantee delivery of a perfectly written document to give you complete confidence when you submit your work. The fee is worked out on a flat rate (£6.95 per thousand words or 0.695 pence per word), so you know exactly how much the proofreading will cost in advance. Once we have received your document(s) we will confirm the word count, the price and the deadline. If you have not heard from us within 2 hours during normal business hours after you have sent your work please resend it from a different email account or send the file to proofreadings(a)gmail.com. We look forward to hearing from you! Yours faithfully Proof-Reading-Service.com

2 2

[MonetDB-users] protocol violation: unexpected line in data block
by tangray 28 Feb '11

28 Feb '11

Hi when execute sql : select * from td_ind_security_held where id = 1560000 in DbVisualizer 7.1.1,it appears "protocol violation: unexpected line in data block" td_ind_security_held has 30 columns(1 int,6 varchar, others decimal) and about 7 million rows. I'm working with MonetDB Server v5.22.3, based on kernel 1.40.3 (downloaded msi from sourceforge) over Windows XP SP3.

2 3

Re: [MonetDB-users] Query time takes equally long on whole
by dsuh 24 Feb '11

24 Feb '11

We have experienced big improvements from Nov-2009SP2 to Oct-2010SP1 as well except for views. It appears that the mitosis optimizer has problems with views and queries on them run slower than without it. (~9 sec slower on 1 min queries on views and ~20 sec slower on 2 min queries on views using default_pipe rather than no_mitosis_pipe or nov2009_pipe) The mitosis optimizer was the big change in the optimizer pipeline between these versions. Is it possible that this is still from the bug?: http://bugs.monetdb.org/show_bug.cgi?id=2472 Can anyone tell me if there are any plans for optimization improvements (either mitosis, commonTerms, or otherwise) with queries on views? David Suh > > Hello Henry, > Thank you for your reply! See inline. > > On Thu, Feb 24, 2011 at 7:54 AM, Henry Addington <hs.addington(a)gmail.com > >wrote: > > > I am no technical expert on MonetDB. But, we have been using MonetDB for > > more than a year now. So, I can give you couple of suggestions > > (or workarounds) that might help based on our experience. We are using a > > third-party application that generates queries and sends them to MonetDB > > which has a transaction table with more than 1.6billion records and > growing > > (timeseries data like yours..) linked to dimensional tables. The kinds of > > queries that are being generated are almost exact type that you are > showing, > > some sort of an aggregation query using group by and filtered with where > > clause. > > > > One thing that we noticed with queries with joins is that inner join > seems > > to be significantly faster than left/right joins even if the results are > no > > different between the 3 types of joins. I know that might not be an > option > > for you. But, it works for our use case. > > > > I've changed my queries into two separate ones: one for the total > timescope, and one for (occasionally) getting the results spread over the > interval for one item. The new total timescope query is faster on less time > as scope, and as fast as before on the total 24 hour scope, so definitely > an > improvement for me. > > > > > > Another thing that we noticed is if you add constraints, ie primary and > > foreign keys, you will get better performance. I think you might already > > have them in your tables though.... > > > > I do have them, but i didn't add them in my create statement. I''m also > going to try if this adds extra speed. > > > > > > We are in the process of testing Oct-2010SP1 release so we can upgrade > > our Nov-2009SP2 environment. We are seeing significant performance > > improvement in most of our typical queries and much smaller memory > footprint > > with the Oct-2010SP1 release. But, we see some performance degradation > with > > queries based on views instead of tables. You might want to try the > Nov-2009 > > optimizer and see if that helps. You can do this by specifyng the > Nov-2009 > > optimizer in the monetdb5.conf file. > > > > This didn't show any difference on the original query, but thanks for > mentioning. I might need it in the future. > > Kind regards, > Rob Berentsen > > > > > On Wed, Feb 23, 2011 at 4:24 AM, Rob Berentsen <rhberentsen(a)gmail.com > >wrote: > > > >> Hello, > >> > >> I'm new to monetdb and installed it two weeks ago to do some tests. I > was > >> very much impressed with the speed on large tables, but in some of my > latest > >> tests regarding subparts of these tables based on a unix timestamp the > time > >> was the same as querying the whole table. Does anyone know what I can do > to > >> get higher speeds on queries in monetdb that only use part of the table, > >> like partition pruning, explicit foreign keys or unique statements, > >> indexes or some other way? > >> > >> I have the following two tables and number of records: > >> > >> CREATE TABLE table1 (T1vid INT NOT NULL, T1Field1 VARCHAR(20) NOT > >> NULL, T1Field2 TINYINT NOT NULL); > >> This table has about 400.000 records. The records are non time bounded, > >> it's just a list. The T1vid is an increased ID, but not generated in > >> momentdb at the moment, but in mysql > >> > >> CREATE TABLE table2 (T2mid INT NOT NULL, T2vid INT NOT NULL, T2timestamp > >> INT NOT NULL, T2Field1 INT NOT NULL, T2Field2 INT NOT NULL); > >> This table has about 1.000.000 records and a unix_timestamp field. It > get > >> a few new records every second and records older then 24 hours are > deleted. > >> The T2mid-field refers to some other table that's not in momentdb's > >> database, so just an integer. The T2vid-field however refers to the > >> T1vid-field in table1 (a foreign key, but i didn't define it that way). > >> > >> The following query takes about 3,5 seconds, it doesnt't have the > >> timestamp included in the WHERE-clause: > >> SELECT SUM(t2.T2Field2), t1.T1Field1, t1.T1Field2, (t2.T2timestamp / > 3600) > >> as interval > >> FROM table2 AS t2 > >> LEFT JOIN table 1 AS t1 ON t1.T1vid=t2.T2vid > >> WHERE t2.T2Field1=8 AND t2.T2vid IN (*list of 15 unique > >> v.T1vid ID's*) > >> GROUP BY interval, t1.T1Field1, t1.T1Field2 ORDER BY > interval > >> DESC; > >> Resulting is a list of the 15 v.T1vid ID's times the number of > interval's. > >> t2.T2timestamp is now devided by 3600 and grouped on this result, so > each > >> set of 15 v.T1vid ID's would reflect 1 hour, returning max 24x15 rows. > >> ** > >> The following query also takes about 3,5 seconds, but it does have the > >> timestamp included in the WHERE-clause. It only needs to access 1 hour > of > >> data instead of the whole 24 hours, and groups it into intervals of 5 > >> minutes (300 sec): > >> SELECT SUM(t2.T2Field2), t1.T1Field1, t1.T1Field2, (t2.T2timestamp / > 300) > >> as interval > >> FROM table2 AS t2 > >> LEFT JOIN table 1 AS t1 ON t1.T1vid=t2.T2vid > >> WHERE* t2.T2timestamp BETWEEN 1298360000 AND 1298363600* > >> AND t2.T2Field1=8 AND t2.T2vid IN (*list of 15 unique > v.T1vid > >> ID's*) > >> GROUP BY interval, t1.T1Field1, t1.T1Field2 ORDER BY > interval > >> DESC; > >> > >> t2.T2timestamp is now devided by 300, so each set of 15 v.T1vid ID's > would > >> reflect 5 minuntes, returning max 12x15 rows. > >> > >> I would very much appreciate any help or hints; please let me know any > >> question you might have. > >> > >> > >> Kind regards, > >> Rob Berentsen > >> > >> > >> > ------------------------------------------------------------------------------ > >> Free Software Download: Index, Search & Analyze Logs and other IT data > in > >> Real-Time with Splunk. Collect, index and harness all the fast moving IT > >> data > >> generated by your applications, servers and devices whether physical, > >> virtual > >> or in the cloud. Deliver compliance at lower cost and gain new business > >> insights. http://p.sf.net/sfu/splunk-dev2dev > >> _______________________________________________ > >> MonetDB-users mailing list > >> MonetDB-users(a)lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/monetdb-users > >> > >> > > > > > > > ------------------------------------------------------------------------------ > > Free Software Download: Index, Search & Analyze Logs and other IT data in > > Real-Time with Splunk. Collect, index and harness all the fast moving IT > > data > > generated by your applications, servers and devices whether physical, > > virtual > > or in the cloud. Deliver compliance at lower cost and gain new business > > insights. http://p.sf.net/sfu/splunk-dev2dev > > _______________________________________________ > > MonetDB-users mailing list > > MonetDB-users(a)lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/monetdb-users > > > > >

1 0

[MonetDB-users] monetdb on ubuntu 10.10 - xquery results displaying only in single line!
by sagarjauhari 24 Feb '11

24 Feb '11

Hello, my xquery results are displaying only in a single line. The hello world example on http://monetdb.cwi.nl/XQuery/QuickTour/DOCMGT/ displays result correctly as: > doc("HelloWorld.xml") <?xml version="1.0" encoding="utf-8"?> <doc> <greet kind="informal">Hi </greet> <greet kind="casual">Hello </greet> <location kind="global">World</location> <location kind="local">Amsterdam</location> </doc> But this: xquery>for $a in (1 to 3) return <number>{$a}</number> outputs this: <XQueryResult><number>1</number><number>2</number><number>3</number></XQueryResult> and for the file :test.xq: (1, 42.0, "Hello World", <node attr="value">test</node>) the xquery mclient -lx -f xml test.xq outputs <?xml version="1.0" encoding="utf-8"?> <XQueryResult>1 42.000000 Hello World<node attr="value">test</node></XQueryResult> Any suggestions? Thanks in advance -- View this message in context: http://old.nabble.com/monetdb-on-ubuntu-10.10---xquery-results-displaying-o… Sent from the monetdb-users mailing list archive at Nabble.com.

2 4

[MonetDB-users] Stored Procedures in MonetDB
by Irini Fundulaki 24 Feb '11

24 Feb '11

Hi all, would it be possible to let us know whether MonetDB/SQL supports stored procedures and provide us with pointers to the features supported (e.g., recursion). Many Thanks Irini ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

2 1

[MonetDB-users] Query time takes equally long on whole and just small part of table
by Rob Berentsen 24 Feb '11

24 Feb '11

Hello, I'm new to monetdb and installed it two weeks ago to do some tests. I was very much impressed with the speed on large tables, but in some of my latest tests regarding subparts of these tables based on a unix timestamp the time was the same as querying the whole table. Does anyone know what I can do to get higher speeds on queries in monetdb that only use part of the table, like partition pruning, explicit foreign keys or unique statements, indexes or some other way? I have the following two tables and number of records: CREATE TABLE table1 (T1vid INT NOT NULL, T1Field1 VARCHAR(20) NOT NULL, T1Field2 TINYINT NOT NULL); This table has about 400.000 records. The records are non time bounded, it's just a list. The T1vid is an increased ID, but not generated in momentdb at the moment, but in mysql CREATE TABLE table2 (T2mid INT NOT NULL, T2vid INT NOT NULL, T2timestamp INT NOT NULL, T2Field1 INT NOT NULL, T2Field2 INT NOT NULL); This table has about 1.000.000 records and a unix_timestamp field. It get a few new records every second and records older then 24 hours are deleted. The T2mid-field refers to some other table that's not in momentdb's database, so just an integer. The T2vid-field however refers to the T1vid-field in table1 (a foreign key, but i didn't define it that way). The following query takes about 3,5 seconds, it doesnt't have the timestamp included in the WHERE-clause: SELECT SUM(t2.T2Field2), t1.T1Field1, t1.T1Field2, (t2.T2timestamp / 3600) as interval FROM table2 AS t2 LEFT JOIN table 1 AS t1 ON t1.T1vid=t2.T2vid WHERE t2.T2Field1=8 AND t2.T2vid IN (*list of 15 unique v.T1vid ID's*) GROUP BY interval, t1.T1Field1, t1.T1Field2 ORDER BY interval DESC; Resulting is a list of the 15 v.T1vid ID's times the number of interval's. t2.T2timestamp is now devided by 3600 and grouped on this result, so each set of 15 v.T1vid ID's would reflect 1 hour, returning max 24x15 rows. ** The following query also takes about 3,5 seconds, but it does have the timestamp included in the WHERE-clause. It only needs to access 1 hour of data instead of the whole 24 hours, and groups it into intervals of 5 minutes (300 sec): SELECT SUM(t2.T2Field2), t1.T1Field1, t1.T1Field2, (t2.T2timestamp / 300) as interval FROM table2 AS t2 LEFT JOIN table 1 AS t1 ON t1.T1vid=t2.T2vid WHERE* t2.T2timestamp BETWEEN 1298360000 AND 1298363600* AND t2.T2Field1=8 AND t2.T2vid IN (*list of 15 unique v.T1vid ID's*) GROUP BY interval, t1.T1Field1, t1.T1Field2 ORDER BY interval DESC; t2.T2timestamp is now devided by 300, so each set of 15 v.T1vid ID's would reflect 5 minuntes, returning max 12x15 rows. I would very much appreciate any help or hints; please let me know any question you might have. Kind regards, Rob Berentsen

2 2

[MonetDB-users] MAL changes in March2011
by Mike De-La-Columnar 22 Feb '11

22 Feb '11

Hi, It seems like the whole MAL language is being upgraded. (the use of columns instead of BATs) are those changes just cosmetic, or is there something else that will benefit from it? also, will the old MAL work in the new version? -- View this message in context: http://old.nabble.com/MAL-changes-in-March2011-tp30985134p30985134.html Sent from the monetdb-users mailing list archive at Nabble.com.

1 0

[MonetDB-users] rdf.sql missing from Mar2011 branch
by Babis Nikolaou 18 Feb '11

18 Feb '11

Hello, the rdf.sql file for creating the schema of an RDF database is missing from the branch of Mar2011. Could you add it please? Thanks, Babis

4 12