On Thu, Feb 21, 2013 at 6:13 PM, Michael McCandless < luc...@mikemccandless.com> wrote:
> On Thu, Feb 21, 2013 at 6:52 AM, Ramprakash Ramamoorthy > <youngestachie...@gmail.com> wrote: > > On Wed, Feb 20, 2013 at 11:11 PM, Michael McCandless < > > luc...@mikemccandless.com> wrote: > > > >> Just use the 2-pass grouping if you can't index your groups as a block > of > >> docs. > >> > >> See > >> > http://lucene.apache.org/core/4_1_0/grouping/org/apache/lucene/search/grouping/package-summary.html > >> for examples... > >> > > > > Thanks Mike. Just wondering if a multi level grouping is possible. My > > understanding as on date would be , run the first pass collector for > every > > field and then do a second pass for each result combo? Can you throw some > > light on this please? > > Can you give an example of what you mean by multi-level grouping? > Say for instance, I have indexed a library, with the following fields. published_year, language, genre, author and title. Now my objective would be group by published_year and then by language and then by genre. The result would be, 2013 English Thriller Thriller A Thriller B Thriller C Romance Romance A Romance B Spanish Thriller Thriller A Comedy Comedy A Comedy B 2012 ..... ..... .... .... and so on. Hope I am clear? Thanks. > > Mike McCandless > > http://blog.mikemccandless.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > -- With Thanks and Regards, Ramprakash Ramamoorthy, India. +91 9626975420
