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From "Mikhail Khludnev (JIRA)" <>
Subject [jira] [Commented] (SOLR-8998) JSON Facet API child roll-ups
Date Mon, 12 Sep 2016 06:58:22 GMT


Mikhail Khludnev commented on SOLR-8998:

bq. query facet that does the block join child->parent
but it returns only parent count, there will be no fields, nor relevancy ranking
bq. topdocs() to get the top parents
however SOLR-7830  is still in progress
bq. field facet (a sub-facet) on the parents (including any rollups)
I might not understand correctly but it may return all ids, without any other fields beside,
and there is no ranking again. 

What's is the most probable direction?   

> JSON Facet API child roll-ups
> -----------------------------
>                 Key: SOLR-8998
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: Facet Module
>            Reporter: Yonik Seeley
> The JSON Facet API currently has the ability to map between parents and children ( see )
> This issue is about adding a true rollup ability where parents would take on derived
values from their children.  The most important part (and the most difficult part) will be
the external API.

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