Thanks Mike, I've opened https://issues.apache.org/jira/browse/SOLR-2553 for this.
It's exciting to hear a workable implementation might be possible! On Fri, May 27, 2011 at 6:23 PM, Michael McCandless < luc...@mikemccandless.com> wrote: > 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 > > >
