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https://issues.apache.org/jira/browse/SOLR-5743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15021155#comment-15021155
 ] 

Mikhail Khludnev commented on SOLR-5743:
----------------------------------------

[~ichattopadhyaya] I'd like to commit it. I just want to confirm that there is 
no veto from anyone. 
I also appreciate if colleagues leave feedbacks for the recent patch, 
especially about its' performance. [~jacobcarter] would you comment on that?

To summarize, If we decide to go on, I'll add it into defaultComponents, after 
that user will be able to get aggregated facets for children fields along side 
with the usual one:
{code}
q={!parent ...}...&facet=true&child.facet.field=COLOR
{code} 

Here is the brief use case description 
https://www.mail-archive.com/solr-user@lucene.apache.org/msg115732.html


> Faceting with BlockJoin support
> -------------------------------
>
>                 Key: SOLR-5743
>                 URL: https://issues.apache.org/jira/browse/SOLR-5743
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: abipc
>              Labels: features
>         Attachments: SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch, 
> SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch, 
> SOLR-5743.patch
>
>
> For a sample inventory(note - nested documents) like this -   
>  <doc>
> <field name="id">10</field>
> <field name="type_s">parent</field>
> <field name="BRAND_s">Nike</field>
> <doc>
> <field name="id">11</field>
> <field name="COLOR_s">Red</field>
> <field name="SIZE_s">XL</field>
> </doc>
> <doc>
> <field name="id">12</field>
> <field name="COLOR_s">Blue</field>
> <field name="SIZE_s">XL</field>
> </doc>
> </doc>
> Faceting results must contain - 
> Red(1)
> XL(1) 
> Blue(1) 
> for a "q=*" query. 
> PS : The inventory example has been taken from this blog - 
> http://blog.griddynamics.com/2013/09/solr-block-join-support.html



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