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https://issues.apache.org/jira/browse/LUCENE-7590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-7590:
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Attachment: LUCENE-7590.patch
First patch adds numeric statistics. I'd appreciate comments about it before I
add support for sorted-numeric (including, whether we should!).
Note that I chose to take either a field or {{ValueSource}}. The latter gives
some flexibility by allowing users to pass an arbitrary VS over e.g. an
{{Expression}} over a numeric DV field.
This, as far as I could tell, does not apply to {{SortedNumericDV}}, or at
least I couldn't find an existing {{ValueSource}} implementation (like
{{LongFieldSource}}) for {{SortedNumericDV}}.
If this approach looks good, I'd like to refactor the class so that it's easy
to share/reuse code between Long and Double NDV fields.
> Add DocValues statistics helpers
> --------------------------------
>
> Key: LUCENE-7590
> URL: https://issues.apache.org/jira/browse/LUCENE-7590
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/misc
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-7590.patch
>
>
> I think it can be useful to have DocValues statistics helpers, that can allow
> users to query for the min/max/avg etc. stats of a DV field. In this issue
> I'd like to cover numeric DV, but there's no reason not to add it to other DV
> types too.
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