Need help optimizing a lat/Lon geo search for mysql

Question

I have a mysql (5.0.22) myisam table with roughly 300k records in it and I want to do a lat/lon distance search within a five mile radius.

I have an index that cov

Answer 1

Depending on the number of your listings could you create a view that contains

Listing1Id, Listing2ID, Distance

Basically just have all of the distances "pre-calculated"

Then you could do something like:

Select listing2ID from v_Distance d where distance < 5 and listing1ID = XXX