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https://issues.apache.org/jira/browse/COUCHDB-1526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Shorin updated COUCHDB-1526:
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Component/s: (was: Database Core)
View Server Support
> Include average in a built-in reduce (_stats)
> ---------------------------------------------
>
> Key: COUCHDB-1526
> URL: https://issues.apache.org/jira/browse/COUCHDB-1526
> Project: CouchDB
> Issue Type: Improvement
> Components: View Server Support
> Affects Versions: 1.2
> Reporter: Eli Stevens
> Priority: Minor
>
> _stats does not provide the average value, which would be very nice to have
> for investigative use (ie. trying things in futon to understand the nature of
> a large dataset). I think it would be useful to add it (doubly so if it
> could be the first key shown in futon, the way sum is now ;).
> Cumulative rounding errors can be avoided by recomputing sum/count at every
> level, rather than using the previous avg value.
> Adding a new built-in reduce that behaves like the current _stats but with
> the additional avg key would also solve this use case (ie. _stats_avg or
> similar). I would only see this being useful if it were important to
> preserve the exact behavior of _stats.
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