[jira] [Commented] (SOLR-9519) Check sub-facets of empty facet buckets for operations that may expand the domain (like filter exclusions)

["Michael Sun (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-9519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15636962#comment-15636962 ] 

Michael Sun commented on SOLR-9519:
-----------------------------------

Thanks [~yonik@apache.org] for suggestions. A new patch is uploaded which checks domain change recursively.

> Check sub-facets of empty facet buckets for operations that may expand the domain (like filter exclusions)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-9519
>                 URL: https://issues.apache.org/jira/browse/SOLR-9519
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Facet Module
>            Reporter: Yonik Seeley
>         Attachments: SOLR-9519.patch, SOLR-9519.patch, SOLR-9519.patch
>
>
> http://markmail.org/message/bgplt2qdxc7gqga5
> {quote}
> Background: the JSON Facet API does not execute sub-facets for a facet
> bucket with a 0 count (and the root facet bucket is like any other
> facet bucket).
> This was to help prevent the combinatorial explosion of deeply nested
> sub-facets with useless information.
> This is obviously incorrect though, when a sub-facet does something
> that can expand the domain rather than just restrict it.  Facet
> exclusions are one of these cases.
> For zero facet buckets, we should check if any sub-facets have these
> properties and then recurse if so.
> {quote}
> Aside: not processing empty sets also helped with issues like what junk values to fill in for statistics... min, max, average, std, etc.  JSON doesn't even officially support NaN, so it's nice to be able to leave these junk values out in many circumstances.



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