I think Greg is right and this query is supposed to be a specialization for a disjunction of multiple range queries. It helps because you need to visit the index of the BKD tree and build a bit set once for the entire disjunction instead of once per range.
I suspect that the fact that it doesn't work with multi-dimensional points is a bug that hasn't been found yet because it's been mostly discussed in the context of 1D fields? On Mon, Nov 22, 2021 at 5:13 PM Michael Sokolov <msoko...@gmail.com> wrote: > > I did a little git spelunking and found this PR > https://github.com/apache/lucene-solr/pull/794 where it was > introduced. It does sound to me as if the intent was to match on > multiple multi-dimensional ranges (ie hypercubes), not on any > dimension among multiple ranges? Why would anyone ever want to do > that? On the other hand a lot of people looked at it ... so maybe > we're missing something here? > > On Sun, Nov 21, 2021 at 11:14 AM Greg Miller <gsmil...@gmail.com> wrote: > > > > Hi folks- > > > > Is anyone familiar with MultiRangeQuery (found in > > o.a.l.sandbox.search)? I was playing around with it recently since it > > might be a good fit for a use-case I'm working on for Amazon's Product > > Search engine, but it looks like it has a pretty fundamental bug in > > how it works. That or I'm completely mis-understanding what the query > > is meant to do. > > > > My understanding is that this query should consider documents to be a > > match if they contain a point that is found in _any_ of the ranges > > represented by this query (i.e., it's a disjunction over a set of > > query ranges). But... it appears that the query incorrectly considers > > a document to be a match if its point matches on any single dimension > > of any range (where it should be requiring all dimensions in a > > particular range to match). > > > > I added a unit test to demonstrate this bug along with a proposed fix > > over here: https://github.com/apache/lucene/pull/437 > > > > If anyone is familiar with this query (or better yet, uses it), I'd be > > really interested in your input. > > > > Cheers, > > -Greg > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org > > For additional commands, e-mail: dev-h...@lucene.apache.org > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: dev-h...@lucene.apache.org > -- Adrien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
