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https://issues.apache.org/jira/browse/SOLR-2366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14074116#comment-14074116
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Tomás Fernández Löbbe commented on SOLR-2366:
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I didn't see this Jira before (just saw this now that I was updating the
faceting wiki). Part of what's described here can be achieved by Interval
Faceting (SOLR-6216). Implementation is different though, because it relies in
DocValues instead of filters.
> Facet Range Gaps
> ----------------
>
> Key: SOLR-2366
> URL: https://issues.apache.org/jira/browse/SOLR-2366
> Project: Solr
> Issue Type: Improvement
> Reporter: Grant Ingersoll
> Assignee: Shalin Shekhar Mangar
> Priority: Minor
> Fix For: 4.9, 5.0
>
> Attachments: SOLR-2366.patch, SOLR-2366.patch, SOLR-2366.patch
>
>
> There really is no reason why the range gap for date and numeric faceting
> needs to be evenly spaced. For instance, if and when SOLR-1581 is completed
> and one were doing spatial distance calculations, one could facet by function
> into 3 different sized buckets: walking distance (0-5KM), driving distance
> (5KM-150KM) and everything else (150KM+), for instance. We should be able to
> quantize the results into arbitrarily sized buckets.
> (Original syntax proposal removed, see discussion for concrete syntax)
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