Hi guys,
I have a problem with specific case of sparql delete statements. I have the
feeling I am doing something wrong.
My case is having a tree like graph structure starting with a certain subject
and having multiple levels. The triples for different levels could be in
different named graphs. I want to create a query that deletes the whole my
tree. A simplified case contains only two levels.
First level in graph1
INSERT DATA {
GRAPH <http://graph1> {
<http://s1> <http://p1> <http:/s2>
}
};
Second level in graph2
INSERT DATA {
GRAPH <http:graph2> {
<http://s2> <http://p2> "literal1" .
<http://s2> <http://p3> <http://url1> .
}
};
I would like to delete the triples from the second graph and any graph actually
as I don't know the name of the second graph. In my real application the second
graph will contain many other triples but I want to delete only the triples
from the second level of my tree.
I use this delete statement:
DELETE {
GRAPH ?g {
<http://s1> ?p1 ?o1.
?o1 ?p2 ?o2.
}
} WHERE {
GRAPH ?g {
<http://s1> ?p1 ?o1.
?o1 ?p2 ?o2.
}
};
Unfortunately this would not work. It behaves as if deletions are not seeing
triples across different graphs.
If I put all the triples in the same graph the above delete query will work. I
am enclosing a junit test case that demonstrates my issue. Can anybody give a
hand please? Any explanations of why this could behave like that or workarounds
are very welcome.
Many thanks,
Luchesar
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