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https://issues.apache.org/jira/browse/SOLR-7214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371242#comment-14371242
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Steve Molloy commented on SOLR-7214:
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I think the underlying implementations should be shared. While I agree that
SimpleFacets got to the point of being anything but simple... I don't think
having completely separate implementations will help at all. Haven't looked at
the new code yet, but how hard would it be to roll in pivot stats (and
everything under SOLR-6350) into this implementation? I'm thinking that while
this new way of passing parameters to facetting is good, we'll still need to
support the old way to avoid any pains for users currently doing it the old
way. And this should be perfectly fine as after all, we're talking about how to
pass parameters, not what to do about them. So, whatever underlying
implementation is more solid, easier to maintain, evolve, etc. We should use
that and have all functionality work with it. If this new implementation
supports all Solr needs, then let's simply have a layer that can parse
parameters into a JSON format that will be provided to it. If it's the other
way around, let's parse the JSON into parameters for the facet processing.
Either way, we should decouple the way to provide parameters from the actual
processing, and we should have a single way of performing that processing for
facets...
> JSON Facet API
> --------------
>
> Key: SOLR-7214
> URL: https://issues.apache.org/jira/browse/SOLR-7214
> Project: Solr
> Issue Type: New Feature
> Reporter: Yonik Seeley
> Attachments: SOLR-7214.patch
>
>
> Overview is here: http://yonik.com/json-facet-api/
> The structured nature of nested sub-facets are more naturally expressed in a
> nested structure like JSON rather than the flat structure that normal query
> parameters provide.
> Goals:
> - First class JSON support
> - Easier programmatic construction of complex nested facet commands
> - Support a much more canonical response format that is easier for clients to
> parse
> - First class analytics support
> - Support a cleaner way to do distributed faceting
> - Support better integration with other search features
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