: Yes, the current JIRA patch uses the FieldCache. I just ment in contrast with Mike's comment about iterating over all the stored fields to support the "post-faceting" situation (but frankly i'm not sure that i undersatnd what the "post-faceting" situation is, so feel free to ignore me)
: >... wouldn't iterating over each doc, and using the : > FieldCache+TermDocs make it very efficient to find all the docs that have : > the same indexed value as the current one? : : The most efficient way will heavily depend on the nature of the : collapse field (few terms or many). I can't currently think of a way : to do it efficiently for both. this sounds a lot like the faceting problem (to term enum or notto term enum) and the discussion about building a "facet field cache" at server startup if we know faceting is important on certain fields ... by default we can do our best, but with added configuration hints telling us what you expect, we can make more informed guesses. -Hoss
