Aldo,
On 25 May 2009, at 18:31, Aldo Bucchi wrote:
Hugh,
On Mon, May 25, 2009 at 10:17 AM, Hugh Williams
<hwilli...@openlinksw.com> wrote:
Hi Aldo,
Yes, I have seen this issue myself before and reported to
development as I
am not convinced the RDFView graphs should be listed or treated
the same as
the other graphs IRIs for triples stored in the database. The way
I have
deleted/dropped then is using the "drop quad map <storage-name>"
as detailed
in the following whitepaper on mapping relational data to RDF with
Virtuoso's RDFViews:
http://virtuoso.openlinksw.com/Whitepapers/html/rdf_views/
virtuoso_rdf_views_example.html
I issued this command and:
* Return: 2 RDF Metadata operations completed ( this is not verbatim,
but from memory )
* Effect:
** I can still see the graph in Conductor > RDF > Graphs ( no change )
** SPARQLing now returns this error
SQLState: 22023
Message: SR007: Function trim needs a string or NULL as argument 1,
not an arg of type ARRAY_OF_POINTER (193)
[Hugh] I would be interested in seeing the script for the RDFViews
created and the drop quad map command used to drop it. Note you can
also use the Virtuoso trace_on() function to obtain more details on
the sparql and sql commands being run by the server which may provide
more information on where the error is occuring.
Regards
Hugh
You will note that the RDF Schema Object UI silent runs this
command before
creating a new quad map for new RDFVIews. I do believe having an
unpublish
command as you suggest either in the graph UI or probably better
in the RDF
Schema Object UI would be a good thing.
Yep. Clarity is paramount here ;)
Thanks,
A
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
On 25 May 2009, at 08:58, Aldo Bucchi wrote:
Hi,
I am having trouble removing a graph that was created as a result of
executing an RDF View definition ( I remember the publish part of the
RDF View process failed, but can't remember exactly why. This is when
we were pushing the envelope a bit ).
I can see this test graph listed under Conductor > RDF > Graphs and I
can also see that it contains data ( via SPARQL ). However, clicking
"Delete" does not remove it.
This is not a blocker, but I would love to know what's going on.
Some questions that come to my head:
* How are these "virtual" graphs stored?
* What can I do to gather more info so we can diagnose this? what
info
would that be?
* In the context of "virtual graphs" ( = RDF Views over VDB ) what
exactly does Delete mean? Does it mean: delete the RDFView metadata?
** In this case, why not change the name to "unpublish" so it doesn't
get confused with: Delete (all the data in the graph)
Thanks!
A
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