Hi Aleksandr,
Using MODIFY graph in SPARQL as per below is actually performing UPDATE
operation.
i.e. you need to specify WHERE clause.
See for example in our doc this usage case:
http://docs.openlinksw.com/virtuoso/sparqlextensions.html#rdfsparulexamples7
Hope this helps.
Best Regards,
Rumi
С уважением, Александр Зарипов
[email protected]
________________________________________
От: Aleksandr A. Zaripov
Отправлено: 22 декабря 2010 г. 23:22
Кому: [email protected]
Тема: Strange behavior of MODIFY query
Hello.
I am running VOS 6.01.3127 and have strange problem.
I have a graph <graph> with triple <s> <p> <o>.
When I'm executing the query
MODIFY <graph> DELETE {<s> <p> <o>} INSERT {<s> <p> <o>} (both, followed
and not with "WHERE {<s> <p> <o>}" ),
which as I expect should leave my triple without any changes, but Virtuoso
says
"Modify <graph>, delete 1 and insert 0 triples -- done" and actually
delete this triple.
I create some workaround to avoid such queries in my application.
But is it right behaviour or bug of Virtuoso SPARQL Endpoint?
Best regards, Alexander A. Zaripov
[email protected]
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