I posted this last week to wikidata(a)lists.wikimedia.org, but perhaps
this is a better forum for this problem. Re-posting it here.
Federated queries are disabled on the stand-alone code out-of-the-box.
I followed the advice on this post to un-disable federated queries for
my local installation:
https://lists.wikimedia.org/pipermail/wikidata/2016-March/008444.html
(Thanks Mr. Malyshev!)
I did have one problem with the build: I found myself having to remove
the checkstyle plugin from the pom.xml file to get the maven build to go
to completion.
Now on my local installation I can get this query to work just fine:
(Current namespace: wdq)
Select *
Where
{
Service <http://localhost:9999/bigdata/namespace/test/sparql>
{
Bind ("Algeria"@en as ?countryLabel)
}
}
Also this:
(current namespace: test)
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
Select *
Where
{
Service <http://localhost:9999/bigdata/namespace/wdq/sparql>
{
Bind ("Algeria"@en as ?countryLabel)
?country rdfs:label ?countryLabel.
}
}
But this query (and every variation I could think of) unfortunately
times out:
(current namespace: wdq)
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
Select *
Where
{
{
Select ?countryLabel
{
Service <http://localhost:9999/bigdata/namespace/test/sparql>
{
Bind ("Algeria"@en as ?countryLabel)
}
}
}
?country rdfs:label ?countryLabel.
}
This is also the case when addressing a Jena service I have set up on a
different port.
I would appreciate any guidance you could give me.
Thanks and regards,