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From "Jonathan Rochkind (Commented) (JIRA)" <>
Subject [jira] [Commented] (SOLR-2242) Get distinct count of names for a facet field
Date Wed, 21 Dec 2011 16:17:31 GMT


Jonathan Rochkind commented on SOLR-2242:

I would find this feature valuable even if it simply did not work at all 
on a distributed index. (Refusing to return a value rather than 
returning a known incorrect value would seem like the right way to go).  
Because my index is not distributed, and I would find this feature 
valuable, heh.

I don't know if Solr currently has any policies against committing 
features that can't work on distributed, but personally my 'vote' would 
be doing that here, with clear documentation that it doesn't work on 
distributed (and the hope that future enhancements may make it more 
feasible to do so, as Erick suggests may possibly maybe happen).

> Get distinct count of names for a facet field
> ---------------------------------------------
>                 Key: SOLR-2242
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: Response Writers
>    Affects Versions: 4.0
>            Reporter: Bill Bell
>            Assignee: Erick Erickson
>            Priority: Minor
>             Fix For: 4.0
>         Attachments:, SOLR-2242-notworkingtest.patch, SOLR-2242.patch,
SOLR-2242.patch, SOLR-2242.shard.patch, SOLR-2242.shard.patch, SOLR-2242.shard.withtests.patch,
SOLR-2242.solr3.1-fix.patch, SOLR-2242.solr3.1.patch, SOLR.2242.solr3.1.patch, SOLR.2242.v2.patch
> When returning facet.field=<name of field> you will get a list of matches for distinct
values. This is normal behavior. This patch tells you how many distinct values you have (#
of rows). Use with limit=-1 and mincount=1.
> The feature is called "namedistinct". Here is an example:
> http://localhost:8983/solr/select?shards=localhost:8983/solr,localhost:7574/solr&indent=true&q=*:*&facet=true&facet.mincount=1&facet.numFacetTerms=2&facet.limit=-1&facet.field=price
> http://localhost:8983/solr/select?shards=localhost:8983/solr,localhost:7574/solr&indent=true&q=*:*&facet=true&facet.mincount=1&facet.numFacetTerms=0&facet.limit=-1&facet.field=price
> http://localhost:8983/solr/select?shards=localhost:8983/solr,localhost:7574/solr&indent=true&q=*:*&facet=true&facet.mincount=1&facet.numFacetTerms=1&facet.limit=-1&facet.field=price
> This currently only works on facet.field.
> {code}
> <lst name="facet_fields">
>   <lst name="price">
>     <int name="numFacetTerms">14</int>
>     <int name="0.0">3</int><int name="11.5">1</int><int name="19.95">1</int><int
name="74.99">1</int><int name="92.0">1</int><int name="179.99">1</int><int
name="185.0">1</int><int name="279.95">1</int><int name="329.95">1</int><int
name="350.0">1</int><int name="399.0">1</int><int name="479.95">1</int><int
name="649.99">1</int><int name="2199.0">1</int>
>   </lst>
> </lst>
> {code} 
> Several people use this to get the group.field count (the # of groups).

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