Hello,
I do not understand why two SPARQL queries work in Virtuoso 06.01.3127
but not in Virtuoso 07.20.3214. May you help me?
These are the equivalent queries launched against a Dbpedia dataset.
###################################################
SELECT ?superclass {GRAPH <http://dbpedia.org> {
?class rdfs:subClassOf* ?superclass.
FILTER (?class = <http://dbpedia.org/ontology/Actor>)
}}
###################################################
SELECT ?superclass {GRAPH <http://dbpedia.org> {
?class rdfs:subClassOf ?superclass OPTION (TRANSITIVE,
T_DISTINCT,T_NO_CYCLES, T_MIN(0)).
FILTER (?class = <http://dbpedia.org/ontology/Actor>)
}}
###################################################
The error message I got for Virtuoso 07.20.3214 was
Virtuoso 37000 Error TR...: transitive start not given
SPARQL query:
define sql:big-data-const 0
#output-format:text/html
define sql:signal-void-variables 1 SELECT ?superclass {GRAPH
<http://dbpedia.org> {
?class rdfs:subClassOf ?superclass OPTION (TRANSITIVE,
T_DISTINCT,T_NO_CYCLES, T_MIN(0)).
FILTER (?class = <http://dbpedia.org/ontology/Actor>)
}}
Thanks in advance.
Regards,
Adam
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