SPARQL Update has no effect

[hannahbast]

I did the following DELETE:

curl -s https://qlever.cs.uni-freiburg.de/api/wikidata?access-token=<access-token> -H "Content-type: application/sparql-update" --data "PREFIX wdt: <http://www.wikidata.org/prop/direct/> PREFIX wd: <http://www.wikidata.org/entity/> DELETE WHERE { wd:Q873 wdt:P166 ?award_received }"

which returned a JSON with the information that 35 triples were deleted.

But the following SELECT returns the 35 triples that are supposed to be deleted:

curl -s https://qlever.cs.uni-freiburg.de/api/wikidata -H "Accept: text/tab-separated-values" -H "Content-type: application/sparql-query" --data "PREFIX wdt: <http://www.wikidata.org/prop/direct/> PREFIX wd: <http://www.wikidata.org/entity/> SELECT * WHERE { wd:Q873 wdt:P166 ?award_received }"

NOTE: This bug was already there with acb6633 (08.01.2025)

[namedgraph]

@hannahbast what's the status of SPARQL Update? Do you have any results of the W3C test suite available?

[ktk]

@namedgraph

• [QUESTION] QLever maturity and road map #1738 (comment)
• https://github.com/ad-freiburg/qlever/wiki/QLever-support-for-SPARQL-1.1-Update
• https://github.com/ad-freiburg/qlever/wiki/First-tests-with-SPARQL-1.1-Update

[semanticfire]

Hi,

I cannot clear a graph with:
DROP GRAPH <iri> and CLEAR GRAPH <iri> are not supported

delete { graph <http://example.com> { ?s ?p ?o}} where { ?s ?p ?o }

results in:

{
    "exception": "Assertion `wasInserted == true` failed. Please report this to the developers. In file \"/qlever/src/index/LocatedTriples.cpp \" at line 220",
    "query": "delete { graph <http://example.com> { ?s ?p ?o}} where { ?s ?p ?o }",
    "resultsize": 0,
    "status": "ERROR",
    "time": {
        "computeResult": 11585,
        "total": 11585
    }