First of all is it possible to simplify further to remove the STR
manipulations. These are bound to give any SPARQL query optimizer a 'hard
time'. Perhaps something like this:
SELECT ?c
FROM NAMED
{
GRAPH
{
?c d ?e .
FILTER (?c = ?h) .
{
SELECT ?h
Thank you very much Jerven for your advice.
I will try it and let you know if the query is faster.
Kind regards,
Pantelis Natsiavas
2016-04-21 10:14 GMT+03:00 Jerven Tjalling Bolleman <
jerven.bolleman@sib.swiss>:
>
> As another virtuoso user.
> Can't you make a simpler query without a subselec
As another virtuoso user.
Can't you make a simpler query without a subselect?
SELECT ?a
FROM NAMED
{
GRAPH
{
?c d ?e .
BIND(REPLACE(STR(?e), "f", "", "i") AS ?g)
BIND(REPLACE(STR(?c), "f", "", "i") AS ?a)
FILTER (?g = STR(?h)) .
}
