This work-around may help:
SELECT ?s ?p ?o
WHERE {
{
BIND (IRI(CONCAT(str(?sparqlEndpoint), "?default-graph-uri=",
encode_for_uri(str(?dataset)))) AS ?url) .
}
SERVICE ?url {
?s ?p ?o
}
}
The trick here is to avoid passing the default query graph into the
query, and instead put it into the URL using the SPARQL 1.1 protocol.
Note that this approach may not help if you have other pre-bound
variables to pass into the SERVICE request.
Holger
On 27/04/2016 16:38, [email protected] wrote:
Hi,
I am trying to query sparql endpoint with sparql motion module of type
sml:ApplyConstruct, where sml:ApplyConstruct is set to:
CONSTRUCT {
?s ?p ?o .
}
WHERE {
SERVICE ?sparqlEndpoint {
GRAPH ?dataset {
?s ?p ?o .
} .
} .
}
?sparqlEndpoint and ?dataset are pointing to correct urls.
Unfortunately when i run script i get exception :
*
Operation failed. On: Apr 22, 2016 5:52:53 PM Reason:
java.lang.UnsupportedOperationException: Initial bindings not
supported for remote queries, consider using a
ParameterizedSparqlString to prepare a query for remote execution
at
com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.setInitialBinding(QueryEngineHTTP.java:236)at
org.topbraid.sparql.LockOptimizedQueryExecution.setInitialBinding(LockOptimizedQueryExecution.java:94)
at
org.topbraid.spin.sparqlmotion.modules.SMModuleUtil.applyVarBindings(SMModuleUtil.java:92)at
org.topbraid.spin.sparqlmotion.modules.SMModuleUtil.createQueryExecution(SMModuleUtil.java:192)
at
org.topbraid.spin.sparqlmotion.lib.internal.ApplyConstructModule.applyConstruct(ApplyConstructModule.java:51)at
org.topbraid.spin.sparqlmotion.lib.internal.ApplyConstructModule.createGraph(ApplyConstructModule.java:41)
at
org.topbraid.spin.sparqlmotion.modules.AbstractSMModule.getRDFOutput(AbstractSMModule.java:907)at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.executeModule(ExecutionEngineImpl.java:176)
at
org.topbraid.spin.sparqlmotion.engine.impl.ExecutionEngineImpl.execute(ExecutionEngineImpl.java:118)at
org.topbraidcomposer.sparqlmotion.views.console.SPARQLMotionConsole.execute(SPARQLMotionConsole.java:79)
at
org.topbraidcomposer.sparqlmotion.actions.AbstractExecuteSPARQLMotionAction$1.run(AbstractExecuteSPARQLMotionAction.java:142)at
org.topbraidcomposer.core.util.ThreadUtil$1$1.run(ThreadUtil.java:64)
at java.lang.Thread.run(Thread.java:745)
Am I doing something wrong ? Or is there any other module that i can
use to query concrete dataset of sparql endpoint ?
Thanks,
Peter G.
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