Hey guys
I've been trying to update some statements in a graph, and I have been
using the following query -
WITH <nepomuk:/ctx/graph>
DELETE { <resA> nao:lastModified ?mod . }
INSERT { <resA> nao:lastModified "2012-01-29T16:29:11Z"^^xsd:dateTime . }
WHERE { <resA> nao:lastModified ?mod . }
This works fine in the case when the <resA> nao:lastModified ?m triple
already exists, but it does not insert the new statement if that
triple does not exist.
I was checking the SPARQL 1.1 Update Standard [1], and I found the
following text -
"Deleting triples that are not present, or from a graph that is not
present will have no effect and will result in success."
So in the case when the triple is not present the delete operation
should result in a success and the insert operation should be carried
out. But that does not seem to be the case.
Could someone please confirm if this is just a bug or is that the
intended behaviour?
[1] http://www.w3.org/TR/2012/PR-sparql11-update-20121108/#deleteInsert
--
Vishesh Handa
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