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https://issues.apache.org/jira/browse/SOLR-8998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15643444#comment-15643444
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Nikita Pchelintsev commented on SOLR-8998:
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Mikhail, is the above solution the only one that works in the current version
of Solr (6.2.1) that implements exclusions for child filters? Are there any
performance drawbacks with this approach (for example compared with the
upcoming https://issues.apache.org/jira/browse/SOLR-9510)?
> 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
>
> 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.
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