Re: SeRQL an RDF rule language: scoping Rules vs Query in W3C wor k

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