> If you have that information from your other filtering, then why not just > fetch them directly? Like IDBObjectStore.get(primary_key)?
The use case, here, is key joining without serialization, so that it is very fast. We also want single scan. get method involve serialization and resanning. The use case, I talked about can be found in http://dev.yathit.com/ydn-db/nosql-query.html in Sorted-merge join section.
