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https://issues.apache.org/jira/browse/SOLR-12398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16523096#comment-16523096
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ASF subversion and git services commented on SOLR-12398:
--------------------------------------------------------

Commit d59c90e5135dc48d1e5bb58ab1a643f34739a70c in lucene-solr's branch 
refs/heads/branch_7x from [~dsmiley]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=d59c90e ]

SOLR-12398: Add Heatmap facet option to JSON Facet API.
* moved the preponderance of the implementation from SpatialHeatmapFacets (used 
by SimpleFacets) into the new API.

(cherry picked from commit 095f9eb)


> Make JSON Facet API support Heatmap Facet
> -----------------------------------------
>
>                 Key: SOLR-12398
>                 URL: https://issues.apache.org/jira/browse/SOLR-12398
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Facet Module, faceting, JSON Request API, spatial
>            Reporter: Jaime Yap
>            Assignee: David Smiley
>            Priority: Major
>              Labels: heatmap
>         Attachments: SOLR-12398.patch, SOLR-12398.patch
>
>
> The JSON query Facet API does not support Heatmap facets. For companies that 
> have standardized around generating queries for the JSON query API, it is a 
> major wart to need to also support falling back to the param encoding API in 
> order to make use of them.
> More importantly however, given it's more natural support for nested 
> subfacets, the JSON Query facet API is be able to compute more interesting 
> Heatmap layers for each facet bucket. Without resorting to the older (and 
> much more awkward) facet pivot syntax.



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