Hello Ivan,
thanks a lot for answering.
On 01/10/2011 05:44 PM, Ivan Mikhailov wrote:
> It's hard to diagnose without dumps of EXPLAINs of these queries.
> Most probably, the last triple pattern has been moved toward the leading
> position because the selectivity of the fixed object variant was
>
Hello Sebastian,
It's hard to diagnose without dumps of EXPLAINs of these queries.
Most probably, the last triple pattern has been moved toward the leading
position because the selectivity of the fixed object variant was
overestimated. You can try to check variants that restrict graphs, if
that is
Hi list,
again I have a question about query performance: why is there a big
difference in query execution time between
select distinct ?r ?v where {
{ ?r ?v1 ?v2 .
FILTER(bif:contains(?v2, "'hello' AND 'world'")) .
}
UNION
{ ?r ?v1 ?v3 .
?v3 ?v4 ?v2 .
?v4 rdfs:subPropertyOf r