[jira] [Commented] (SOLR-11709) JSON "Stats" Facets should support directly specifying a domain change (for filters/blockjoin/etc...)

["Hoss Man (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16273144#comment-16273144 ] 

Hoss Man commented on SOLR-11709:
---------------------------------

Perhaps we should add a {{type:"stat"}} long form for statistics?

so that this...

{code}
foo:"max(popularity)"
{code}

...becomes syntactic sugar for...
{code}
foo: { 
  type:"stat",
  stat:"max(popularity)"
}
{code}

...where the later can be augmented to include an explicit domain...

{code}
foo: { 
  type:"stat",
  stat:"max(popularity)"
  domain: {
    excludeTags: "mytag"
  }
}
{code}

?

> JSON "Stats" Facets should support directly specifying a domain change (for filters/blockjoin/etc...)
> -----------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11709
>                 URL: https://issues.apache.org/jira/browse/SOLR-11709
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>
> AFAICT, the simple string syntax of JSON Facet Modules "statistic facets" (ex: {{foo:"min(fieldA)"}} ) means there is no way to request a statistic with a domain change applied -- stats are always computed relative to it's immediate parent (ie: the baseset matching the {{q}} for a top level stat, or the constrained set if a stat is a subfacet of something else)
> This means that things like the simple "fq exclusion" in StatsComponent have no straight forward equivalent in JSON faceting. 
> The work around appears to be to use a {{type:"query", q:"*:*, domain:...}} parent and specify the stats you are interested in as sub-facets...
> {code}
> $ curl 'http://localhost:8983/solr/techproducts/query' -d 'q=*:*&omitHeader=true&fq={!tag=boo}id:hoss&stats=true&stats.field={!max=true ex=boo}popularity&rows=0&json.facet={
> bar: { type:"query", q:"*:*", domain:{excludeTags:boo}, facet: { foo:"max(popularity)" } } }'
> {
>   "response":{"numFound":0,"start":0,"docs":[]
>   },
>   "facets":{
>     "count":0,
>     "bar":{
>       "count":32,
>       "foo":10}},
>   "stats":{
>     "stats_fields":{
>       "popularity":{
>         "max":10.0}}}}
> {code}



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