Hi Francesco, Are you able to provide a sample dataset and steps to recreate this issue we can setup locally ?
Best Regards Hugh Williams Professional Services OpenLink Software, Inc. // http://www.openlinksw.com/ Weblog -- http://www.openlinksw.com/blogs/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Google+ -- http://plus.google.com/100570109519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers > On 3 Nov 2015, at 14:47, Francesco Balzu <i_ba...@hotmail.it> wrote: > > Hi all! > I have the following problem with the MAX aggregate function in SPARQL. If I > run the query > > > PREFIX foaf:<http://xmlns.com/foaf/0.1/ <http://xmlns.com/foaf/0.1/>> > PREFIX km4c:<http://www.disit.org/km4city/schema# > <http://www.disit.org/km4city/schema#>> > PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns# > <http://www.w3.org/1999/02/22-rdf-syntax-ns#>> > > SELECT ?ride (max(?avmr) AS ?avmrLast) > FROM <http://localhost:8890/avm_quadStore_50K > <http://localhost:8890/avm_quadStore_50K>> > FROM > <http://www.disit.org/km4city/resource/Autobus/5_Lotto_Metropolitano_Firenze_f > > <http://www.disit.org/km4city/resource/Autobus/5_Lotto_Metropolitano_Firenze_f>> > WHERE{ > ?bs rdf:type km4c:BusStop. > ?bs foaf:name "PISANA 08". > ?bsf km4c:isForecastOfBusStop ?bs. > ?bsf km4c:isForecastOfAVM ?avmr. > ?ride km4c:hasAVMRecord ?avmr. > } > GROUP BY ?ride ORDER BY DESC (?avmrLast) LIMIT 15 > > I get the result > > ride > avmrLast > http://www.disit.org/km4city/resource/4900006 > <http://www.disit.org/km4city/resource/4900006> iri_id_0_with_no_name_entry > <http://localhost:8890/conductor/iri_id_0_with_no_name_entry> > http://www.disit.org/km4city/resource/4900000 > <http://www.disit.org/km4city/resource/4900000> iri_id_0_with_no_name_entry > <http://localhost:8890/conductor/iri_id_0_with_no_name_entry> > This is not correct, since I expect ?avmrLast to be bound to an IRI. If I > don't use the MAX function, that is if I run the following query > > PREFIX foaf:<http://xmlns.com/foaf/0.1/ <http://xmlns.com/foaf/0.1/>> > PREFIX km4c:<http://www.disit.org/km4city/schema# > <http://www.disit.org/km4city/schema#>> > PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns# > <http://www.w3.org/1999/02/22-rdf-syntax-ns#>> > > SELECT ?ride (?avmr AS ?avmrLast) > FROM <http://localhost:8890/avm_quadStore_50K > <http://localhost:8890/avm_quadStore_50K>> > FROM > <http://www.disit.org/km4city/resource/Autobus/5_Lotto_Metropolitano_Firenze_f > > <http://www.disit.org/km4city/resource/Autobus/5_Lotto_Metropolitano_Firenze_f>> > WHERE{ > ?bs rdf:type km4c:BusStop. > ?bs foaf:name "PISANA 08". > ?bsf km4c:isForecastOfBusStop ?bs. > ?bsf km4c:isForecastOfAVM ?avmr. > ?ride km4c:hasAVMRecord ?avmr. > } > GROUP BY ?ride ORDER BY DESC (?avmrLast) LIMIT 15 > > I get instead > > ride avmrLast > http://www.disit.org/km4city/resource/4900000 > <http://www.disit.org/km4city/resource/4900000> > http://www.disit.org/km4city/resource/2015-12-11T15:16:54.3500000+02:00+4900000 > > <http://www.disit.org/km4city/resource/2015-12-11T15:16:54.3500000+02:00+4900000> > http://www.disit.org/km4city/resource/4900006 > <http://www.disit.org/km4city/resource/4900006> > http://www.disit.org/km4city/resource/2015-12-11T09:10:22.3500006+02:00+4900006 > > <http://www.disit.org/km4city/resource/2015-12-11T09:10:22.3500006+02:00+4900006> > > Which may be the reasons? I am using Virtuoso for Windows > Version: 07.20.3214 > Build: Jun 24 2015 > > > Thank you very much for your help. > Best regards, > Francesco Balzano > ------------------------------------------------------------------------------ > _______________________________________________ > Virtuoso-users mailing list > Virtuoso-users@lists.sourceforge.net > <mailto:Virtuoso-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/virtuoso-users > <https://lists.sourceforge.net/lists/listinfo/virtuoso-users>
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