What is the difference of these two scenarios?
1. a dataset with all "s p o g" quads loaded into the dataset, with this
configuration
<#dataset> rdf:type tdb2:DatasetTDB2 ;
tdb2:location "TDB2" ;
tdb2:unionDefaultGraph true .
2. a dataset where each graph is in its own folder, with this configuration
<#dataset> rdf:type ja:RDFDataset ;
ja:namedGraph
[ ja:graphName <http://example.org/g1> ;
ja:graph <#g1> ] ;
ja:namedGraph
[ ja:graphName <http://example.org/g2> ;
ja:graph <#g2> ] ;
.
<#g1> rdf:type tdb:GraphTDB2 ;
tdb2:location "DB-1" .
<#g2> rdf:type tdb:GraphTDB2 ;
tdb2:location "DB-2" .
- Is there any performance hit with the second method?
- With the second method, is it still possible to have the default union graph
of all single graphs?
- I tried to query Fuseki with the second method:
- This query works: select ?g where { graph ?g {} }
- This query returns "Error 500: Not in a transaction":
select ?s from <http://example.org/g1> where { ?s ?p ?o } limit 1
