The group head is the document from each group that was selected during the
collapse. Only the group heads remain in the result set following the
collapse. It looks like in the example above you have the basic idea
correct.
Joel Bernstein
http://joelsolr.blogspot.com/
On Sat, Jun 20, 2015 at
Hi Upayavira
Thank you for your explanation onthe difference between traditional
grouping and collapsingQParser. I understand more now.
On 6/19/2015 7:11 PM, Upayavira wrote:
On Fri, Jun 19, 2015, at 06:20 AM, Derek Poh wrote:
Hi
I read about collapsingQParser returns the facet count the
Hi Joel
By group heads, is it referring to the document thatis use to represent
each group in the main result section?
Eg. Using the below 3 documentsandwe collapse on field supplier_id
supplier_id:S1
product_id:P1
supplier_id:S2
product_id:P2
supplier_id:S2
product_id:P3
With collapse on
Hi
I read about collapsingQParser returns the facet count the same as
group.truncate=true and has this issue with the facet count and the
after filter facet count notthe same.
Using group.facetdoes not has this issue but it's performance is very
badcompared to collapsingQParser.
I trying to
On Fri, Jun 19, 2015, at 06:20 AM, Derek Poh wrote:
Hi
I read about collapsingQParser returns the facet count the same as
group.truncate=true and has this issue with the facet count and the
after filter facet count notthe same.
Using group.facetdoes not has this issue but it's performance
The CollapsingQParserPlugin currently doesn't calculate facets at all. It
simply collapses the document set. The facets are then calculated only on
the group heads.
Grouping has special faceting code built into it that supports the
group.facet functionality.
Joel Bernstein
Unfortunately this won't give you group.facet results:
q=whatever
fq={!collapse tag=collapse}blah
facet.field={!ex=collapse}my_facet_field
This will give you the expanded facet counts as it removes the collapse
filter.
A good explanation of group.facets is here:
The AnalyticsQuery can be used to implement custom faceting modules. This
would allow you to calculate facets counts in an algorithm similar to
group.facets before the result set is collapsed. If you are in distributed
mode you will also need to implement a merge strategy:
