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From "Nguyen Kien Trung (JIRA)" <>
Subject [jira] [Updated] (SOLR-2242) Get distinct count of names for a facet field
Date Thu, 01 Sep 2011 05:52:11 GMT


Nguyen Kien Trung updated SOLR-2242:

    Attachment: SOLR-2242.solr3.1-fix.patch

I'm using Solr 3.2. Instead of patching, I extend {{SimpleFacets}} and {{FacetComponent}},
apply the changes mentioned in [^SOLR-2242.solr3.1.patch] with a small fix ([^SOLR\-2242.solr3.1-fix.patch]).
int offset = params.getFieldInt(facetValue, FacetParams.FACET_OFFSET, 0);
resCount.add("numTerms", counts.size() + offset);

as {{counts}} contains list of terms started from the given {{offset}}

It accepts param {{facet.numTerms=true|false}} and produce the output
<lst name="facet_fields">
   <lst name="color">
      <int name="numTerms">124</int>
      <lst name="counts" />
          <int name="red">4</int>
          <int name="blue">3</int>
Not yet tested with sharding

> 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: Simon Willnauer
>            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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