[jira] [Commented] (SOLR-9738) Stats node not null if empty results

["David Smiley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-9738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15653051#comment-15653051 ] 

David Smiley commented on SOLR-9738:
------------------------------------

If this is true, then looks like a bug to me, albeit a minor one.

> Stats node not null if empty results
> ------------------------------------
>
>                 Key: SOLR-9738
>                 URL: https://issues.apache.org/jira/browse/SOLR-9738
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 5.5.3
>            Reporter: Andrea Lovato
>            Priority: Minor
>              Labels: beginner, empty, stats, test
>
> Hi all, 
> first of all, you're doing a great job with solr, it's amazing :)
> actually i'm workin' on updating solr to v4.6.1 to v5.5.3 on our production env and i notice that on v5.5.3 the stats node is not null if solr returns 0 results.
> For example: request: <queryForEmptyRequest>&stats=true&stats.field=fa_p1
> v5.5.3
>   "response":{"numFound":0,"start":0,"docs":[]},
>   "stats":{
>     "stats_fields":{
>       "fa_p1":{
>         "min":null,
>         "max":null,
>         "count":0,
>         "missing":0,
>         "sum":0.0,
>         "sumOfSquares":0.0,
>         "mean":"NaN",
>         "stddev":0.0}}}
> v4.6.1
> "response": {"numFound": 0,"start": 0,"docs": [ ]},
> "stats": {
>     "stats_fields": {
>         "fa_p1": null
>     }
> }
> but i've also noticed that if i disable the mean field on v5.5.3, the stats node for the field fa_p1 is empty
> request:  <queryForEmptyRequest>&stats=true&stats.field={!mean=false}fa_p1
>   "response":{"numFound":0,"start":0,"docs":[]},
>   "stats":{
>     "stats_fields":{
>       "fa_p1":{}}}
> Is this the correct behaviour? Or am i missing something?
> thanks



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