Re: Value of moving OPTIONAL clauses to the end of a graph pattern?

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