- From: Steve Harris <S.W.Harris@ecs.soton.ac.uk>
- Date: Tue, 4 Nov 2003 15:11:07 +0000
- To: www-rdf-rules@w3.org
On Tue, Nov 04, 2003 at 03:56:33 +0100, Jeen Broekstra wrote: > Now I'm confused :) What do you mean with merging in this context? > Filtering duplicate statements? If so, then I can't help you with > literature refs from the top of my head, but we have implemented > this by pushing a DISTINCT modifier down to the SQL engine to filter > out duplicate variable-binding combinations, and an additional > triple filter on top of that. We haven't spent too much time on > optimizing this, but sofar it has not given us any serious > performance problems. Of course this approach is only used when the We do the same thing - it is quite an overhead (mostly latency) when the result set is large (100k lines or so), but for small result sets it has little overhead. I don't understand Andy's question either :) - Steve
Received on Tuesday, 4 November 2003 10:11:21 UTC