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From Callum Lamb <cl...@mintel.com>
Subject Re: Multilevel grouping?
Date Thu, 14 Jul 2016 16:33:00 GMT
Look at the collapse module
https://cwiki.apache.org/confluence/display/solr/Collapse+and+Expand+Results.
It can the same thing as group.

If you want to get counts/facets from before the collapse, tag the collapse
statement use the exclude tags tags in your json facets (there's an
equivalent for non json facets). I think the default nullpolicy is
different from grouping too, but you can change it to be the same.

I've not been able to get 2 collapses to work on my version of Solr. But
collapse + group works and you can get 2 levels. Not being able to do
multiple collapses appears to be a bug (it sorta works). I recall there
being JIRA case somewhere stating it was fixed in some version. So you may
be able to do as many levels as you like if you upgrade/already run a very
recent version of Solr.





On Thu, Jul 14, 2016 at 3:52 PM, Aditya Sundaram <aditya.sundaram@myntra.com
> wrote:

> Thanks Yonik, was looking for exactly that, is there any workaround to
> achieve that currently?
>
> On Tue, Jul 12, 2016 at 5:07 PM, Yonik Seeley <yseeley@gmail.com> wrote:
>
> > I started this a while ago, but haven't found the time to finish:
> > https://issues.apache.org/jira/browse/SOLR-7830
> >
> > -Yonik
> >
> >
> > On Tue, Jul 12, 2016 at 7:29 AM, Aditya Sundaram
> > <aditya.sundaram@myntra.com> wrote:
> > > Does solr support multilevel grouping? I want to group upto 2/3 levels
> > > based on different fields i.e 1st group on field one, within which i
> > group
> > > by field 2 etc.
> > > I am aware of facet.pivot which does the same but retrieves only the
> > count.
> > > Is there anyway to get the documents as well along with the count in
> > > facet.pivot???
> > >
> > > --
> > > Aditya Sundaram
> >
>
>
>
> --
> Aditya Sundaram
> Software Engineer, Technology team
> AKR Tech park B Block, B1 047
> +91-9844006866
>

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