Hi Robert,
Development suggest the query:
sparql
PREFIX dc: http://purl.org/dc/elements/1.1/
select distinct ?title ?u
from http://dbpedia.org
WHERE
{
?prog dc:title ?title .
?u rdfs:label ?label .
FILTER (bif:isnotnull (bif:strstr (?label, ?title)))
}
ORDER BY DESC ((select ?created where {
Hi Ivan,
thank you! Looks gut ...
First one seems to work as a Sparql query.
syntax error at bif:strstr before (
FILTER ( BOUND(bif:strstr (?label, ?title) )
But it works without the BOUND keyword.
I'm new to Virtuoso and SQL / SPARQL environment and try to compare
small buch of
On 6/10/11 1:10 AM, Robbet wrote:
Hi Ivan,
thank you! Looks gut ...
First one seems to work as a Sparql query.
syntax error at bif:strstr before (
FILTER ( BOUND(bif:strstr (?label, ?title) )
But it works without the BOUND keyword.
I'm new to Virtuoso and SQL / SPARQL environment and
Hi Kingsley,
changed NumberofBuffers and MaxDirtyBuffer to 4GB recommendation. Did i
miss something?
Dunno if it's only rely in the given hardware or if my query causes the
slowdowns.
Best regards,
Robert
On 10.06.2011 02:20, Kingsley Idehen wrote:
On 6/10/11 1:10 AM, Robbet wrote:
Hi
On 6/10/11 1:28 AM, Robbet wrote:
Hi Kingsley,
changed NumberofBuffers and MaxDirtyBuffer to 4GB recommendation. Did i
miss something?
Dunno if it's only rely in the given hardware or if my query causes the
slowdowns.
If after doing that you don't have improvements. We are down to DBMS
size
Hi Robbet,
What are your actual NumberOfBuffers and MaXDirtyBuffer settings for your 4GB
memory system, I presume those recommended in the Virtuoso Performance Tuning
guide at:
http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtRDFPerformanceTuning
Which are:
Hi,
yes, i confirm both values.
Best regards,
Robert
On 10.06.2011 04:02, Hugh Williams wrote:
Hi Robbet,
What are your actual NumberOfBuffers and MaXDirtyBuffer settings for your 4GB
memory system, I presume those recommended in the Virtuoso Performance Tuning
guide at:
On Fri, 2011-06-10 at 02:10 +0200, Robbet wrote:
Hi Ivan,
thank you! Looks gut ...
First one seems to work as a Sparql query.
syntax error at bif:strstr before (
FILTER ( BOUND(bif:strstr (?label, ?title) )
But it works without the BOUND keyword.
I'm sorry, there should be
Hi Ivan,
i'll try this.
My whole query would be like:
/Select ?title ?label
v
Where
{?s dc:title ?title;
dc:created ?created./
//
/?dbpedia rdfs:label ?label
FILTER (bif:strcontains (?title, ?label))/
/?dbpedia foaf:name ?name
}
Hello,
actually i'm trying to find a solution to compare two string variables
(exact match of the string and if one variable contains the other).
Is it possible (in any way) to use the bif:contains function in this
case? Like /variable1 bif:contains variable2/ (or the other way round) ?
Robert,
bif:strstr (?haystack, ?needle) will return an zero-based position of
of ?needle in ?haystack, or NULL if not found [1]. Thus
FILTER (BOUND (bif:strstr (?haystack, ?needle)))
is what you need.
For similar future needs, note
FILTER (BOUND (bif:strcasestr (?haystack, ?needle)))
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