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Posted to issues@lucene.apache.org by "Greg Miller (Jira)" <ji...@apache.org> on 2021/05/10 20:10:00 UTC
[jira] [Updated] (LUCENE-9952) FacetResult#value can be inaccurate
in SortedSetDocValueFacetCounts
[ https://issues.apache.org/jira/browse/LUCENE-9952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Greg Miller updated LUCENE-9952:
--------------------------------
Summary: FacetResult#value can be inaccurate in SortedSetDocValueFacetCounts (was: FacetResult#value should consistently report doc count, not field count)
> FacetResult#value can be inaccurate in SortedSetDocValueFacetCounts
> -------------------------------------------------------------------
>
> Key: LUCENE-9952
> URL: https://issues.apache.org/jira/browse/LUCENE-9952
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/facet
> Affects Versions: 8.9
> Reporter: Greg Miller
> Priority: Minor
>
> As described in a dev@ list [thread|http://mail-archives.apache.org/mod_mbox/lucene-dev/202105.mbox/%3CCANJ0CDo-9zt0U_pxWNOBkfiJpaAXZGGwOEJPnENAP6JzWz_t9Q%40mail.gmail.com%3E], the value of {{FacetResult#value}} is sometimes populated with the number of _docs_ that contain a value, and other times is populated with the total number of values. For single-valued cases, these two values are identical, but they are not in multi-value cases. For example, if a multi-value doc has two value for the same field being counted, it will count only once when doing a "doc count," but twice if doing a "field count."
> We should implement consistent behavior across all of our {{Facet}} implementations. I propose that this behavior should be the doc count. If the doc count isn't possible to calculate, we should populate {{FacetResult#value}} with {{-1}} (which is what the taxonomy-based implementations currently do).
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