Re: [Virtuoso-users] Problem concenring deleting triples

[Ivan M. <imi...@op...>]

Hello Aliki,

The graph http://www.openlinksw.com/schemas/virtrdf# contains system
metadata about all RDF Views in use, including the default one that is
used to store triples in DB.DBA.RDF_QUADS table. RDF_GLOBAL_RESET() does
not make the table DB.DBA.RDF_QUADS (the default storage) entirely
empty, it erases everything and then load the default content of
http://www.openlinksw.com/schemas/virtrdf# .

Best Regards,

Ivan Mikhailov
OpenLink Software
http://virtuoso.openlinksw.com

On Wed, 2012-02-29 at 12:58 +0200, aliki aliki wrote:
> Hello!
> 
> I have great trouble while trying to delete data (rdf triples) from my
> virtuoso database. First I tried to delete everything by using the
> RDF_GLOBAL_RESET() function. When finished, I searched for the
> remaining graphs using the sparql command:
> 
> select distinct ?g
> from <http://localhost:1111/> {graph ?g {?s a ?t} };
>  
> which gave the result: http://www.openlinksw.com/schemas/virtrdf#
> 
> 
> However, the db.dba.load_list was still full with all the graphs I had
> previously loaded. So I deleted everything from the load_list thinking
> that the data had been erased from the database and not from the
> load_list. Then I performed the query:
> 
> select distinct ?r from {?u ?r ?s}
> 
> hoping not to find any of the triples deleted. Unfortunately some of
> the triples are still loaded and probably not belonging to any graph
> as there is no graph loaded on the system. 
> 
> I'm not quite sure that I understand how virtuoso works and I cannot
> find any logical explanation on my own. Could you please tell me how
> can I solve the problem? And if I manage to solve it, which is the
> right way to delete data from graphs or to delete entire graphs?
> 
> Thanks in advance!! 
> 
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