Tomás Fernández Löbbe created SOLR-6216:
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Summary: Better faceting for multiple intervals on DV fields
Key: SOLR-6216
URL: https://issues.apache.org/jira/browse/SOLR-6216
Project: Solr
Issue Type: Improvement
Reporter: Tomás Fernández Löbbe
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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