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From "Mikhail Khludnev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8998) JSON Facet API child roll-ups
Date Mon, 07 May 2018 07:09:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16465528#comment-16465528
] 

Mikhail Khludnev commented on SOLR-8998:
----------------------------------------

Further improvement might be:
* handling numeric fields in {{uniqueBlock(id)}}
* using filters for aggregating hits for better performance eg {{uniqueBlockQuery(parent:true)}}
I can create issues for those who want to take part. I'm not able to work on it soon.  

> JSON Facet API child roll-ups
> -----------------------------
>
>                 Key: SOLR-8998
>                 URL: https://issues.apache.org/jira/browse/SOLR-8998
>             Project: Solr
>          Issue Type: New Feature
>          Components: Facet Module
>            Reporter: Yonik Seeley
>            Assignee: Mikhail Khludnev
>            Priority: Major
>             Fix For: 7.4, master (8.0)
>
>         Attachments: SOLR-8998-api-doc.patch, SOLR-8998-doc.patch, SOLR-8998.patch, SOLR-8998.patch,
SOLR-8998.patch, SOLR_8998.patch, SOLR_8998.patch, SOLR_8998.patch
>
>
> The JSON Facet API currently has the ability to map between parents and children ( see
http://yonik.com/solr-nested-objects/ )
> 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.
> [~mkhludnev] says
> {quote}
> The bottom line is to introduce {{uniqueBlock(\_root_)}} aggregation, which is supposed
to be faster than {{unique(\_root_)}} and purposed for blocked index only. For now it it supports
singlevalue string fields, docValues usually make sense.   
> {quote}



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