[jira] [Resolved] (SOLR-8230) Create Facet Telemetry for Nested Facet Query

["Yonik Seeley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-8230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yonik Seeley resolved SOLR-8230.
--------------------------------
       Resolution: Fixed
    Fix Version/s: 5.5

Committed.  Thanks Michael!
I also added a simple test to just test for the presence of "facet-info" and also randomly added it in the main TestJsonFacets test just to ensure that it didn't cause exceptions or other issues for all the various facet types.

>From a style perspective, I also moved the license to the top of the new file.

> Create Facet Telemetry for Nested Facet Query
> ---------------------------------------------
>
>                 Key: SOLR-8230
>                 URL: https://issues.apache.org/jira/browse/SOLR-8230
>             Project: Solr
>          Issue Type: Sub-task
>          Components: Facet Module
>            Reporter: Michael Sun
>             Fix For: 5.5, Trunk
>
>         Attachments: SOLR-8230.patch, SOLR-8230.patch, SOLR-8230.patch, SOLR-8230.patch, SOLR-8230.patch
>
>
> This is the first step for SOLR-8228 Facet Telemetry. It's going to implement the telemetry for a nested facet query and put the information obtained in debug field in response.
> Here is an example of telemetry returned from query. 
> Query
> {code}
> curl http://localhost:8228/solr/films/select -d 'q=*:*&wt=json&indent=true&debugQuery=true&json.facet={
> top_genre: {
>   type:terms,
>   field:genre,
>   numBucket:true,
>   limit:2,
>   facet: {
>     top_director: {
>         type:terms,
>         field:directed_by,
>         numBuckets:true,
>         limit:2
>     },
>     first_release: {
>         type:terms,
>         field:initial_release_date,
>         sort:{index:asc},
>         numBuckets:true,
>         limit:2
>     }
>   }
> }
> }'
> {code}
> Telemetry returned (inside debug part)
> {code}
>     "facet-trace":{
>       "processor":"FacetQueryProcessor",
>       "elapse":1,
>       "query":null,
>       "sub-facet":[{
>           "processor":"FacetFieldProcessorUIF",
>           "elapse":1,
>           "field":"genre",
>           "limit":2,
>           "sub-facet":[{
>               "filter":"genre:Drama",
>               "processor":"FacetFieldProcessorUIF",
>               "elapse":0,
>               "field":"directed_by",
>               "limit":2},
>             {
>               "filter":"genre:Drama",
>               "processor":"FacetFieldProcessorNumeric",
>               "elapse":0,
>               "field":"initial_release_date",
>               "limit":2},
>             {
>               "filter":"genre:Comedy",
>               "processor":"FacetFieldProcessorUIF",
>               "elapse":0,
>               "field":"directed_by",
>               "limit":2},
>             {
>               "filter":"genre:Comedy",
>               "processor":"FacetFieldProcessorNumeric",
>               "elapse":0,
>               "field":"initial_release_date",
>               "limit":2}]}]},
> {code}



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