Thanks Chime!

That would be typical of an optimization strategy anyway, whether manual or automated, right?

I see some doc about Jena's query optimization at http://jena.apache.org/documentation/query/explain.html . If anyone can point me to similar pages for other SPARQL query processors, I'd appreciate it.

Thanks,

Bob

On 12/20/2012 4:17 PM, Chime Ogbuji wrote:
If the implementation evaluates the patterns in the order you provide (rather than determine an optimal evaluation strategy independent of the structure of the given query), I think it does make sense.

--
Chime Ogbuji
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On Thursday, December 20, 2012 at 4:10 PM, Bob DuCharme wrote:

Since OPTIONAL clauses have no chance of reducing the search space for
their containing graph pattern, does it make sense as a general rule of
thumb to put them after all the ones that do, i.e. after the
non-OPTIONAL triple patterns?

thanks,

Bob


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