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From "Lance Norskog (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2242) Get distinct count of names for a facet field
Date Fri, 29 Apr 2011 05:52:03 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026863#comment-13026863
] 

Lance Norskog commented on SOLR-2242:
-------------------------------------

bq. There is a lot of logic in getListedTermCounts() and getTermCountsLimit(). If we optimize,
and just add a counter, we need to make sure the new methods are not forgotten about (test
cases?). I have seen that happen numerous times.
Ayup. In fact this breaks SimpleFacetsTest. Everything in facets need tests.

> Get distinct count of names for a facet field
> ---------------------------------------------
>
>                 Key: SOLR-2242
>                 URL: https://issues.apache.org/jira/browse/SOLR-2242
>             Project: Solr
>          Issue Type: New Feature
>          Components: Response Writers
>    Affects Versions: 4.0
>            Reporter: Bill Bell
>            Priority: Minor
>             Fix For: 4.0
>
>         Attachments: SOLR-2242.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?q=*:*&facet=true&facet.field=manu&facet.mincount=1&facet.limit=-1&f.manu.facet.namedistinct=0&facet.field=price&f.price.facet.namedistinct=1
> Here is an example on field "hgid" (without namedistinct):
> {code}
> - <lst name="facet_fields">
> - <lst name="hgid">
>   <int name="HGPY0000045FD36D4000A">1</int> 
>   <int name="HGPY00000FBC6690453A9">1</int> 
>   <int name="HGPY00001E44ED6C4FB3B">1</int> 
>   <int name="HGPY00001FA631034A1B8">1</int> 
>   <int name="HGPY00003317ABAC43B48">1</int> 
>   <int name="HGPY00003A17B2294CB5A">5</int> 
>   <int name="HGPY00003ADD2B3D48C39">1</int> 
>   </lst>
>   </lst>
> {code}
> With namedistinct (HGPY0000045FD36D4000A, HGPY00000FBC6690453A9, HGPY00001E44ED6C4FB3B,
HGPY00001FA631034A1B8, HGPY00003317ABAC43B48, HGPY00003A17B2294CB5A, HGPY00003ADD2B3D48C39).
This returns number of rows (7), not the number of values (11).
> {code}
> - <lst name="facet_fields">
> - <lst name="hgid">
>   <int name="_count_">7</int> 
>   </lst>
>   </lst>
> {code}
> This works actually really good to get total number of fields for a group.field=hgid.
Enjoy!

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