[SOLR-12398] Make JSON Facet API support Heatmap Facet

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.5
• Component/s: Facet Module, faceting, JSON Request API, spatial
• Labels: heatmap
• Assignee: David Smiley
• Reporter: Jaime Yap
• Created: 24/May/18 21:34
• Updated: 08/Jun/19 15:13
• Resolved: 26/Jun/18 02:41

Description

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.