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error with unconstrained query #523

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balhoff opened this issue Dec 10, 2021 · 5 comments
Closed

error with unconstrained query #523

balhoff opened this issue Dec 10, 2021 · 5 comments

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@balhoff
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balhoff commented Dec 10, 2021

I'm very interested in trying out QLever and looking forward to full SPARQL 1.1 support, especially named graphs. I got it set up and ran into an issue with the first query I usually try to see if a triplestore is running:

Query: 
SELECT ?s ?p ?o WHERE { ?s ?p ?o . } LIMIT 10

Error Msg: 
CHECK FAILED (Asked to execute a scan for the full index. This should never happen.; in ../src/engine/IndexScan.cpp, line 261, function virtual void IndexScan::computeResult(ResultTable*))

Will you support this kind of query in the future?

@hannahbast
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@balhoff Thank you for your comment. We are currently adding SPARQL 1.1 features at a high speed. The query from your example is trivial to support. Named graphs are also not hard to support. Both features will be added shortly.

@balhoff
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balhoff commented Dec 10, 2021

Thank you, that sounds great.

@hannahbast
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@balhoff We would be interested to hear about typical use cases for which you have QLever in mind. Also, if you have an interesting dataset, please let us know.

@balhoff
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balhoff commented Dec 14, 2021

@hannahbast thank you, I will send you an email soon.

@hannahbast
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Moved to #615

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