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https://issues.apache.org/jira/browse/SOLR-9868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813119#comment-15813119
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Rustam Hashimov commented on SOLR-9868:
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Feedbacks to improve the code and close the gaps for contribution would be much
appreciated!
> RangeFacet : Use DocValues for accs and docSet collection instead of
> RangeQuery
> -------------------------------------------------------------------------------
>
> Key: SOLR-9868
> URL: https://issues.apache.org/jira/browse/SOLR-9868
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Facet Module
> Affects Versions: master (7.0)
> Reporter: Rustam Hashimov
> Fix For: master (7.0)
>
>
> RangeFacet initiates a range query for each range bucket to get the docSet.
> DocSet later used for accs collection.
> For singleValued numeric fields, we can use docValues to find the matching
> slots for each doc to collect accumulators while iterating over base docSet.
> If there is a subFacet, docSet per range bucket can be collected from base
> docSet as well.
> Gains :
> - One iteration over base docSet vs querying over baseDocSet for each range
> bucket
> - Memory saving If there is no subFacet, since per bucket docSet is not needed
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