Hello Alexander, What is the complete text of the query and what are the data in question? Additionally, what is exact server version? The case is quite strange because "by default" these two should result in identical fragments of SQL.
Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com On Fri, 2010-04-23 at 23:28 +0700, Alexander Sidorov wrote: > I forgot to notice that first query doesn't work. > > 2010/4/23 Alexander Sidorov <[email protected]> > Hello! > > Should these queries: > > WHERE > { > ?s <http://www.geonames.org/ontology#featureClass> > "http://www.geonames.org/ontology#P"; . > } > > WHERE > { > ?s > <http://www.geonames.org/ontology#featureClass> ?featureClass . > FILTER (?featureClass = "http://www.geonames.org/ontology#P";) > } > > be equivalent? > > Yes, I know featureClass predicate stores URIs but not > literals at GeoNames dataset. But my custom GeoNames dataset > first stored it as literals (it really doesn't change anything > from semantic point of view as there is now URI > <http://www.geonames.org/ontology#P>). Then for performance > reasons I have reimplemented RDF generator so that > featureClass stores URIs. But there is a chance this problem > can be reproduced on more real usecases so I decided to report > it. > > Regards, > Alexander
