On 22/01/14 11:18, Rohana Rajapakse wrote:
Yes it works!
I take you mean ?s1 is set and ?s is not?
If ?s is set, then check the query you were using to access the data.
Can you please tell me what you mean by "running with default union
graph on". I thought we always have a default graph, and if no
named-graph is specified in sparql (update or select) queries, the
operations are performed against the default graph, i.e. triples being
inserted goes in the default graph and select queries return data in all
graphs (including the default graph).
That's right and that's the normal mode of operation. A separate
default graph.
How can use change default union graph to off?
It's off unless something sets it on.
The ways that can happen are:
1/ In the dataset assembler:
<#dataset> rdf:type tdb:DatasetTDB ;
tdb:location "DB" ;
tdb:unionDefaultGraph true ;
.
2/ The server section of the config file:
ja:context [ ja:cxtName "tdb:unionDefaultGraph" ; ja:cxtValue true ] ;
3/ the command line or start up script:
--set tdb:unionDefaultGraph=true
What exactly is the uri of the default graph?
The URI <urn:x-arq:DefaultGraph> is a pseudo named graph that accesses
the the storage default graph regardless of whether the query default
graph is the union of all named graphs.
Andy
Thanks
Rohana
-----Original Message-----
From: Andy Seaborne [mailto:a...@apache.org]
Sent: 22 January 2014 11:09
To: users@jena.apache.org
Subject: Re: Default graph issue (tdb-backed Fuseki)
On 22/01/14 09:29, Rohana Rajapakse wrote:
Hi,
Hi there,
I have a tdb-backed Fuseki installation. I am inserting data using
INSERT DATA sparql query (also tried reading triple data from a file)
without giving a named-graph uri (with GRAPH keyword),
Did you just use the UI or load the data some other way as well?
the query is executed
without errors and in the query forms of the Fuseki web console I see
the message “*Update succeeded*”, but a select query without giving a
named-graph (with GRAPH <…>) does not show the inserted triples.
Could you try this query please:
SELECT ?s ?s1 ?s2 {
{ ?s ?p ?o }
UNION
{ GRAPH <urn:x-arq:DefaultGraph> { ?s1 ?p1 ?o1 } }
UNION
{ GRAPH ?g2 { ?s2 ?p2 ?o2 } }
}
It looks like you are running with default union graph on - maybe it was
set globally when the server was started.
Andy
It all works when I inserted data into a named-graph using the
GRAPH<…>
Can someone please let me know what is going on.
I am using Fuseki-1.0.0 with Jena-2.11.0
Here is the TDB config file:
<#service_tdb_all> rdf:type fuseki:Service ;
rdfs:label "TDB Service (RW)" ;
fuseki:name "data" ;
fuseki:serviceQuery "query" ;
fuseki:serviceQuery "sparql" ;
fuseki:serviceUpdate "update" ;
fuseki:serviceUpload "upload" ;
fuseki:serviceReadWriteGraphStore "data" ;
# A separate read-only graph store endpoint:
fuseki:serviceReadGraphStore "get" ;
fuseki:dataset <#tdb_dataset_readwrite> ;
.
<#tdb_dataset_readwrite> rdf:type tdb:DatasetTDB ;
tdb:location "MYTDB" ;
.
Thanks for any help.
Rohana
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