Hi all!
How can obtain all graph URIs in a given Virtuoso sparql end point?
I tried in http://demo.openlinksw.com/sparql with the query
SELECT DISTINCT ?g
WHERE { GRAPH ?g {?s ?p ?o}}
But it just gives me
40001 Error SR172: Transaction deadlocked
in
Hi Vanessa,
Please use the following special function for obtaining a list of available
graphs in Virtuoso:
DB.DBA.SPARQL_SELECT_KNOWN_GRAPHS()
Which can be run from an isql command line prompt or the Virtuoso conductor SQL
interface.
Best Regards
Hugh Williams
Professional Services
Hello Vanessa,
Finding all graphs on a busy database is indeed a problem.
The most popular way is to cheat a bit in hope that every graph
contains at least one triple for some rdf:type of some subject. The
query
SELECT DISTINCT ?g WHERE { GRAPH ?g {?s a ?t}}
has much more changes to complete,
