Re: Default graph issue (tdb-backed Fuseki)

[Andy Seaborne]

On 22/01/14 11:34, Rohana Rajapakse wrote:

Dear Andy,

you are absolutely correct. There is "tdb:unionDefaultGraph true ." in the
config file for a different (read only) endpoint. It seems to affect the
entire datastore (not endpoint specific!)

It shouldn't - could you post the whole config file please ?

        Andy

thanks

Rohana


On 22 January 2014 11:18, Rohana Rajapakse <
rohana.rajapa...@gossinteractive.com> wrote:

  Yes it works!

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).

How can use change default union graph to off?

What exactly is the uri of the default graph?

Thanks

Rohana


-----Original Message-----
From: Andy Seaborne [mailto:a...@apache.org <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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