Hi Kingsley,
Thanks for the prompt response. I just tried it and it works well. I
haven't compared the performance yet but wish the string match is faster.
However, I am having trouble querying with the String Literal with SPARQL.
The following query does not work for Virtuoso.
```sparql
select ?s {
?s base:name "sensor1". # also tried "sensor1"^^xsd:string but the same
result.
}
```
This query returns empty result.
If I query with no pattern (?s ?p ?o), I can see the following triple:
:xxxx base:name "sensor1",
Can't sort out the problem. Do you have any ideas on this?
Thank you!
With regards,
Jason Koh
cseweb.ucsd.edu/~jbkoh
On Mon, Jan 22, 2018 at 2:52 PM, Kingsley Idehen <kide...@openlinksw.com>
wrote:
> On 1/22/18 5:11 PM, Jason Koh wrote:
>
> Hi there,
>
> I am trying to use Virtuoso for metadata of city-scale sensor database. (
> metroinsight.io).
>
> I wonder if there is a way to optimize certain SPARQL query pattern. I
> often query this:
> ```sparql
> select ?s where {
> ?s base:name ex:mySensor1 .
> }
> ```
>
> I could optimize it by caching those with Redis or else, but I wonder if I
> can force indexing "name" properties in Virtuoso.
>
> Thank you!
>
>
> With regards,
> Jason Koh
> cseweb.ucsd.edu/~jbkoh <http://cseweb.ucsd.edu/%7Ejbkoh>
>
>
> Have you looked at text indexing in Virtuoso with regards to SPARQL?
>
> [1] http://docs.openlinksw.com/virtuoso/rdfsparqlrulefulltext/ .
>
> --
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software (Home Page: http://www.openlinksw.com)
>
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