[Virtuoso-users] [graph existance] ASK query returns always true - again

[user701 <us...@or...>]

Hi, I repost a question for which I still have not found the answer by myself. Thanks for any help! 

 


> Hi,

>  

> When trying to know if a graph exists on a local Virtuoso RDF graph, the return is always "true", wether the graph already exists or not.

>  

> I tried:

>       ASK{GRAPH {}}

> and

>       ASK{GRAPH {?s ?p ?o}}

>  

> The empty graph is known for being source of problems. What should be the query to do against a Virtuoso database?

>  

> Best,

>  

> Jibé

>  

>  

> Some Virtuoso version info (showed at startup)

>  

> OpenLink Virtuoso Universal Server
Version 07.20.3212-pthreads for Linux as of Mar 21 2015
uses parts of OpenSSL, PCRE, Html Tidy
Database version 3126
SQL Optimizer enabled (max 1000 layouts)
Compiler unit is timed at 0.000262 msec
built-in procedure "repl_undot_name" overruled by the RDBMS