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https://issues.apache.org/jira/browse/SOLR-7406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomás Fernández Löbbe updated SOLR-7406:
----------------------------------------
    Attachment: SOLR-7406.patch

Here is the initial patch. Still TODO:
* javadocs 
* distributed test. 
* validate requests with grouping
* Replace hardcoded strings with constants
* Test hard end setting

It has a random tests to compare both methods and make sure both return the 
same thing, although it accepts the results to be in different order.

> Support DV implementation in range faceting
> -------------------------------------------
>
>                 Key: SOLR-7406
>                 URL: https://issues.apache.org/jira/browse/SOLR-7406
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Tomás Fernández Löbbe
>            Assignee: Tomás Fernández Löbbe
>             Fix For: Trunk
>
>         Attachments: SOLR-7406.patch
>
>
> interval faceting has a different implementation than range faceting based on 
> DocValues API. This is sometimes faster and doesn't rely on filters / filter 
> cache.
> I'm planning to add a "method" parameter that would allow users to chose 
> between the current implementation ("filter"?) and the DV-based 
> implementation ("dv"?). The result for both methods should be the same, but 
> performance may vary.
> Default should continue to be "filter".



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