Re: [Virtuoso-users] Generating a unique ID via SPARQL HTTP

Hi Aldo, Here are some links of calling (bif) functions in SPARQL queries: 1. http://virtuoso.openlinksw.com/presentations/SPARQL_Tutorials/SPARQL_Tutorials_Part_2/SPARQL_Tutorials_Part_2.html 2. http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsqlfromsparql Best Regards, Rumi Thanks

Re: [Virtuoso-users] DISTINCT query problem

Hi Sören, The same query is actually being passed by PHP to the Virtuoso as I can see the query it receives using the trace_on('exec') call to enable tracing of SQL stmts in Virtuoso: sparql SELECT DISTINCT ?o FROM WHERE {?s a ?o} What I do also see in the Virtuos

Re: [Virtuoso-users] Blank node usage via Sesame

Hi Timo, This is odd as the version you are getting from CVS which works is data Feb 2010, which was the date of Virtuoso 6.1.0 open source release and would explain why you are not getting the version information. The one you downloaded and the one from the Virtuoso 6.1.2 open source release

Re: [Virtuoso-users] Slow query performance after moving to amazon ec2

Hi Mark, You indicate having set this up AWS EC2 instance, which I presume is a Virtuoso one (http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtuosoEC2AMI), from another hosted instance. Is this other hosted setup a Virtuoso EC2 AMI instance also or some other hosted server you set Vir

Re: [Virtuoso-users] Blank node usage via Sesame

Hi Hugh. Sorry for the late reply downloaded : -rw-r--r-- 1 tiwe tiwe 38483 2010-11-17 15:05 virt_sesame3.jar tiwe@tiwe:~/work$ java -jar virt_sesame3.jar OpenLink Virtuoso(TM) Provider for Sesame3(TM) Version 3.0-alpha [Build 1.1] from CVS : -rw-r--r-- 1 tiwe tiwe 30546 2010-02-12 14:56 v

Re: [Virtuoso-users] DISTINCT query problem

Thanks Hugh for the quick reply! Its quite weired, that the PHP odbc drive has such side-effects - I thought the odbc client just forwards the query to the server and makes the results it obtains from there available. I somehow found a workaround last night - simply also selecting COUNT(*) s

[Virtuoso-users] Slow query performance after moving to amazon ec2

Hi All, I've moved a demo application to AWS Ec2 from another hosted setup. Since doing so I've found that a large portion of my sparql queries have gone from returning in 0.5 seconds to 7-8 seconds. The datasets themselves are quite small ~ 120k triples total in quad store. An example of one of t

Re: [Virtuoso-users] DISTINCT query problem

Hi Sören, I have installed the 1M BSBM data into a 64bit Windows Virtuoso 6.2 instance and querying via the Conductor , isql or ODBC Directly I get the same 159 distinct rows returned: $ /opt/virtuoso/bin/isql opluswinbuild: Connected to OpenLink Virtuoso Driver: 06.02.3128 OpenLink Virtuos