an index of a product with a price field. This product may have a price of 1mi N, probably less than 20.
search criteria: more than 10w, more than 50w, etc. To search for products with a price that meets these conditions
the current practice is that when you generate a product price field index, a price category is generated for the product according to each price, which is written in AME Z. for example, the price range field of a product is productA.pricre: a code Bpenc < / price >. Then go to the partial match when searching the B interval. The field of the price range.
I don"t know if there are any other good ideas