SPARQL query result size

[Iker Esnaola]

Hi everybody,

 

I am using the LOD 1.5.12 version, along with the RapidMiner Studio 7.1.0. version.

 

I have uploaded some triples to a private Virtuoso Server.  After making a specific SPARQL query in the SPARQL endpoint, I get over 47.000 triples. However, when I try to replicate this same query with the “SPARL Data Importer” module, I can only retrieve 10.000 triples.

 

I tried to reconfigure this number in the “Manage Connections” --> “SPARQL result page size” but it seems that 10.000 is the limit.

 

Is there any way to reconfigure this in some other place (e.g. in a configuration file)??

 

Thanks in advance.

Iker Esnaola-Gonzalez

 

 

De: Petar Ristoski [mailto:petar.ri...@gmail.com]
Enviado el: miércoles, 7 de septiembre de 2016 5:35
Para: RapidMiner Linked Open Data Extension
CC: Iker Esnaola
Asunto: Re: SPARQL query issue with xsd:dateTime

 

Hi Iker,

 

Could you please share the SPARQL endpoint you are using, so I could test the query? Or is it a private SPARQL endpoint?

 

Cheers,

Petar

[Petar Ristoski]

Hi Iker,

The page size doesn't set a limit on the final set of results, but only the number of results that could be returned per each request. The page size should be set based on the configuration of your SPARQL endpoint. It should be equal or lower than the value set on your SPARQL endpoint, otherwise you are going to miss some results. 

Cheers,

Petar

[semih yumusak]

Hi Iker,

The default result size limit is 10000 for the Virtuoso Sparql endpoint. Try to change it by tuning the  ResultSetMaxRows property as described in the following link.

https://logd.tw.rpi.edu/tutorial/installing_using_virtuoso_sparql_endpoint

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[Iker Esnaola]

Hello,

 

Thank you for the your early responses. I see I was wrong thinking that limitation was set by the SPARQL Module Importer.

 

I have followed Semih’s link and I was able to tune the ResultSetMaxRows of my Virtuoso SPARQL endpoint. Just in case someone else needs it, I used the Virtuoso Conductor interface for that purpose: System Admin -> Parameters -> SPARQL.

 

Best regards,

Iker Esnaola-Gonzalez

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