Can you open a Lucene issue (against the new grouping module) for this? I think this is a compelling use case that we should try to support.
In theory, with the "general" two-pass grouping collector, this should be possible, but will require three passes, and we also must generalize the 2nd pass collector to accept arbitrary collectors for each group (today it's "hardwired" to sort-by-SortField collectors). I suspect coupling the single-pass grouping collector (currently still a patch on LUCENE-3129) with the two-pass collector could also work. Also, can you describe more details about the two fields you want to group/collapse by? Mike http://blog.mikemccandless.com On Fri, May 27, 2011 at 6:13 AM, Martijn Laarman <mpdre...@gmail.com> wrote: > Hi, > > I was wondering if this issue had already been raised. > > We currently have a use case where nested field collapsing would be really > helpful > > I.e Collapse on field X then Collapse on Field Y within the groups returned > by field X > > The current behavior of specifying multiple fields seem to be returning > mutiple result sets. > > Has this already been feature requested ? Does anybody know of a workaround > ? > > Many thanks, > > Martijn >
