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https://issues.apache.org/jira/browse/SOLR-9395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15413994#comment-15413994
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Doug Turnbull commented on SOLR-9395:
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Hmm that won't work, nm as you'd do stats over a relevance score :-/ yeah you
probably need some way of passing up the exists value and/or declaring
something as non existent. I'll have to think on it some more
> Add ceil/floor bounding to stats calculations
> ---------------------------------------------
>
> Key: SOLR-9395
> URL: https://issues.apache.org/jira/browse/SOLR-9395
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: master (7.0)
> Reporter: Doug Turnbull
> Fix For: master (7.0)
>
>
> In the pull request to be attached we add optional ceil and floor parameters
> to a field being computed via the stats component. This bounds the stats
> calculations to ceil to floor inclusive.
> For example, let's say your searching over all the employees.
> stats=true&stats.field=employee_age
> But you want to focus on employees aged 18-60 for whatever reason. You can
> reissue this query as
> stats=true&stats.field={!floor=18 ceil=60}employee_age
> This limits the resulting stats calculations to 18-60 inclusive. This
> functionality also works on date fields (see test in PR).
> Now one question might be, why not do this with a filter query? In many cases
> you don't necessarily want to filter these documents from the main search
> results. You just want to eliminate outliers from a specific stats
> calculation. For example, you search your employee database for "clerks." You
> still want to see all the clerks, even little 16 year old Timmy. But for this
> particular calculation you just want to focus on folks of traditional working
> age for whatever reason.
> Some notes
> - floor/ceil are only supported as local params.
> - works for date and numeric values
> - date math works!
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