[jira] [Updated] (SOLR-6351) Let Stats Hang off of Pivots (via 'tag')

["Vitaliy Zhovtyuk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-6351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vitaliy Zhovtyuk updated SOLR-6351:
-----------------------------------
    Attachment: SOLR-6351.patch

Intermediate results:

1. Added pivot facet test to SolrExampleTests, extended org.apache.solr.client.solrj.SolrQuery to provide multipls stats.field parameter
2. Added FacetPivotSmallTest and moved all asserts from DistributedFacetPivotSmallTest to XPath assertions, separated it to few test methods
3. "tag" local parameter parsing added 
4. added org.apache.solr.handler.component.StatsInfo#tagToStatsFields and org.apache.solr.handler.component.StatsInfo#getStatsFieldsByTag 
to lookup list of stats fields by tag
5. Modified PivotFacetProcessor to collect and put StatValues for ever pivot field, added test to assert stats value of pivots
6. Updated PivotField and org.apache.solr.client.solrj.response.QueryResponse to read stats values on pivots

> Let Stats Hang off of Pivots (via 'tag')
> ----------------------------------------
>
>                 Key: SOLR-6351
>                 URL: https://issues.apache.org/jira/browse/SOLR-6351
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Hoss Man
>         Attachments: SOLR-6351.patch
>
>
> he goal here is basically flip the notion of "stats.facet" on it's head, so that instead of asking the stats component to also do some faceting (something that's never worked well with the variety of field types and has never worked in distributed mode) we instead ask the PivotFacet code to compute some stats X for each leaf in a pivot.  We'll do this with the existing {{stats.field}} params, but we'll leverage the {{tag}} local param of the {{stats.field}} instances to be able to associate which stats we want hanging off of which {{facet.pivot}}
> Example...
> {noformat}
> facet.pivot={!stats=s1}category,manufacturer
> stats.field={!key=avg_price tag=s1 mean=true}price
> stats.field={!tag=s1 min=true max=true}user_rating
> {noformat}
> ...with the request above, in addition to computing the min/max user_rating and mean price (labeled "avg_price") over the entire result set, the PivotFacet component will also include those stats for every node of the tree it builds up when generating a pivot of the fields "category,manufacturer"



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