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https://issues.apache.org/jira/browse/MARMOTTA-651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393398#comment-15393398
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Sergio Fernández commented on MARMOTTA-651:
-------------------------------------------
[[email protected]], could you give a try to the current {{HEAD}} at
{{develop}}.
I've just introduced a patch to deal with a JAX-RS issue, and now works for me,
both with {{curl}} int he command-line:
{code:none}
$ curl -X POST 'http://localhost:8080/sparql/select' -H 'Content-Type:
text/plain' --data 'CONSTRUCT { ?s ?p ?o } WHERE { ?s ?p ?o } limit 10'
[ {
"@graph" : [ {
"@id" : "http://localhost:8080/ldp";,
"@type" : [ "http://www.w3.org/ns/ldp#Container";,
"http://www.w3.org/ns/ldp#Resource";, "http://www.w3.org/ns/ldp#BasicContainer";,
"http://www.w3.org/ns/ldp#RDFSource"; ],
"http://purl.org/dc/terms/created"; : [ {
"@type" : "http://www.w3.org/2001/XMLSchema#dateTime";,
"@value" : "2016-07-26T09:54:52.000+02:00"
} ],
"http://purl.org/dc/terms/modified"; : [ {
"@type" : "http://www.w3.org/2001/XMLSchema#dateTime";,
"@value" : "2016-07-26T09:54:52.000+02:00"
} ],
"http://www.w3.org/2000/01/rdf-schema#label"; : [ {
"@value" : "Marmotta's LDP Root Container"
} ],
"http://www.w3.org/ns/ldp#interactionModel"; : [ {
"@id" : "http://www.w3.org/ns/ldp#Container";
} ]
} ],
"@id" : "http://localhost:8080/context/default";
} ]
{code}
and {{SPARQLWrapper}} from Python:
{code:javascript}
>>> from SPARQLWrapper import SPARQLWrapper, POST
>>> sparql = SPARQLWrapper("http://localhost:8080/sparql/select";)
>>> sparql.setMethod(POST)
>>> sparql.setQuery("CONSTRUCT { ?s ?p ?o } WHERE { ?s ?p ?o } limit 10")
>>> print(len(sparql.query().convert()))
8
{code}
Please, let us know if it also works for you now.
> CONSTRUCT Queries return no results
> -----------------------------------
>
> Key: MARMOTTA-651
> URL: https://issues.apache.org/jira/browse/MARMOTTA-651
> Project: Marmotta
> Issue Type: Bug
> Components: KiWi Triple Store
> Affects Versions: 3.3.0
> Environment: Kiwi with postgres backend - tested with SPARQL wrapper
> - Sesame returns results, kiwi returns empty set
> Reporter: Rob Atkinson
> Assignee: Sergio Fernández
> Fix For: 3.4.0
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> a SPARQL CONSTRUCT statement against the KIwi returns empty result sets.
> (even when equivalent SELECT statements return results. )
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