Searching for URIs vs. resources from Bob DuCharme on 2012-12-16 (public-sparql-dev@w3.org from October to December 2012)

From: Bob DuCharme <bob@snee.com>
Date: Sun, 16 Dec 2012 16:24:10 -0500
To: public-sparql-dev@w3.org
Message-ID: <50CE3BFA.2030605@snee.com>

Imagine that I have ten million triples, and these are two of them:

   <http://w> rdfs:label "my literal" .
   <http://x> <http://y> <http://z> .

I got the impression somewhere that this query

    SELECT ?s WHERE { ?s <http://y> <http://z> }

would run faster than this one:

    SELECT ?s WHERE { ?s rdfs:label "my literal" }

Is this true, and if so is it because URIs will always be indexed and 
literals won't necessarily be? Or is it all dependent on the 
implementation?

thanks,

Bob

Received on Sunday, 16 December 2012 21:24:31 UTC