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From "Kensho Hirasawa (JIRA)" <>
Subject [jira] [Commented] (SOLR-10528) Use docvalue for range faceting in JSON facet API
Date Thu, 20 Apr 2017 04:03:04 GMT


Kensho Hirasawa commented on SOLR-10528:

I guess it is possible to avoid numeric boxing by stopping using generics but it leads to
duplicated codes. Since the calculation of slot index can be modified a lot to support "include"
parameter, I will remove numeric boxing after supporting it.

> Use docvalue for range faceting in JSON facet API
> -------------------------------------------------
>                 Key: SOLR-10528
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: Facet Module
>    Affects Versions: 6.5
>            Reporter: Kensho Hirasawa
>            Priority: Minor
>         Attachments: SOLR-10528.patch
> Range faceting in JSON facet API has only one implementation. In the implementation,
all buckets are allocated and then range queries are executed for all the buckets. Therefore,
memory usage and computational cost of range facet can be very high if range is wide and gap
is narrow. 
> I think range faceting in JSON facet should have the implementation which uses DocValues
instead of inverted indices. By scanning DocValues, we can execute range facets much more
efficiently especially when the number of buckets is large.

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