[redland-dev] bug in rasqal
dave at dajobe.org
Sat Oct 11 04:36:26 CEST 2008
Pierre-Antoine Champin wrote:
> It seems to me that rasqal 0.9.15 is bugged with regard to FILTER
> embeded in an OPTIONAL pattern
> see http://www.w3.org/TR/rdf-sparql-query/#OptionalAndConstraints
> the result with rasqal is
> result: [title=string("The Semantic Web"),
> roqet: Query returned 1 results
> Seems that the FILTER is filtering at the "top level", not only the
> subresults of the optional pattern.
> NB: I could not test rasqal 0.9.16 (sorry about that), but the release
> note does not mention any bugfix related to filter, so I assume it is
> still there...
OPTIONAL is buggy - there are several bugs reported on this:
This particular case is not working; optional & filter do
only work at the top level.
The fix is rewrite the query engine, which I'm doing, rather slowly
since it's in my spare time.
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