Hi!
here's a query to find multiple humans with
nationality:Greece that have
the same day of birth and day of death:
http://tinyurl.com/ow6lpen
It produces one pair, and executes in about 0.6 seconds.
Here's a query to try to add item numbers and labels to the previous
search:
http://tinyurl.com/ovjwzc9
It *just* completes, taking just over 60 seconds to execute.
It looks like some issue with nested queries in Blazegraph, I've sent a
report to them and will see what they say.
Obviously the second query as written at the moment
involves a
sub-query, which inevitably must make it a bit slower -- but given the
solution set of the sub-query only has two rows, and an exact date for a
given property ought to be a fairly quick key to look up, why is the
second query taking 100 times longer than the first ?
Yes, in theory it should be fast, so I suspect some kind of bug.
--
Stas Malyshev
smalyshev(a)wikimedia.org