Hello Vishesh, The query says:
For every triple <resA> nao:lastModified ?mod found in database (if any), prepare future removal of <resA> nao:lastModified ?mod and prepare insertion of <resA> nao:lastModified "2012-01-29T16:29:11Z"^^xsd:dateTime . When all (if any) operations are prepared, perform the actual edition of the database. No <resA> nao:lastModified ?mod at the very beginning --- no manipulations prepared --- no effect. The solution is to make separate DELETE and then an unconditional INSERT. Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com On Tue, 2013-05-14 at 15:27 +0530, Vishesh Handa wrote: > 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 > > ------------------------------------------------------------------------------ > AlienVault Unified Security Management (USM) platform delivers complete > security visibility with the essential security capabilities. Easily and > efficiently configure, manage, and operate all of your security controls > from a single console and one unified framework. Download a free trial. > http://p.sf.net/sfu/alienvault_d2d > _______________________________________________ > Virtuoso-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
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