Query progress

So, as it turns out delaying the Queries release these past few months 
turned out to be a good thing. Initially I'd devised this caching 
scheme that required a query invocation to supply a name if caching was 
desired; something like:

(retrieve ((?x) :name frodo)
   (?x (hobbit (name frodo))))

This evening I cooked up a scheme that allows transparent caching of 
queries, and even allows for queries that differ by variable name 
alone. For example:

(retrieve (?x)
   (?x (hobbit (name frodo))))

(retrieve (?hobbit)
   (?hobbit (hobbit (name frodo))))

These two invocations would hash to the same query instance, assuming 
I've done my job correctly. I think this is much nicer, and caching 
will yield significant performance gains for queries. The caching 
scheme isn't foolproof yet, and needs more work. However, look for a 
preliminary release RSN.

Cheers,

-- 
------------------------------------------
David E. Young
[email protected]
http://lisa.sourceforge.net

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