ICV range constraint not scaling


I have the following type of ICV rule in our database: range(arkiv:opprettetDato, xsd:dateTime)

We have at the moment some 300 000 triples with arkiv:opprettetDato and the query for validating the ICV rule above takes around 400-500 ms.

Query is along the way of:

select distinct * where { 
    ?a arkiv:opprettetDato ?b. 
    filter(datatype(?b) != xsd:dateTime)

I don’t think there is much hope for getting that query to run any faster, so I’ve had to simply remove this ICV constraint from our database.

Any chance though that a specialised index just for this kind of case could be created?


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