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From "Mark Miller (JIRA)" <>
Subject [jira] [Commented] (SOLR-6216) Better faceting for multiple intervals on DV fields
Date Mon, 07 Jul 2014 16:28:33 GMT


Mark Miller commented on SOLR-6216:


The numbers look good, the patch looks good, looks like good comments, looks like good tests,
very clean patch.

Unfortunately, probably not something I can look at soon personally, but just to note in case
another committer can tackle this more near term.

> Better faceting for multiple intervals on DV fields
> ---------------------------------------------------
>                 Key: SOLR-6216
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Tomás Fernández Löbbe
>         Attachments: SOLR-6216.patch, SOLR-6216.patch, SOLR-6216.patch, SOLR-6216.patch,
> There are two ways to have faceting on values ranges in Solr right now: “Range Faceting”
and “Query Faceting” (doing range queries). They both end up doing something similar:
> {code:java}
> searcher.numDocs(rangeQ , docs)
> {code}
> The good thing about this implementation is that it can benefit from caching. The bad
thing is that it may be slow with cold caches, and that there will be a query for each of
the ranges.
> A different implementation would be one that works similar to regular field faceting,
using doc values and validating ranges for each value of the matching documents. This implementation
would sometimes be faster than Range Faceting / Query Faceting, specially on cases where caches
are not very effective, like on a high update rate, or where ranges change frequently.
> Functionally, the result should be exactly the same as the one obtained by doing a facet
query for every interval

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