[jira] [Commented] (SOLR-2242) Get distinct count of names for a facet field

["Shawn Heisey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13690500#comment-13690500 ] 

Shawn Heisey commented on SOLR-2242:
------------------------------------

[~billnbell] [~yriveiro]:

I am having a hard time understanding what this feature actually DOES, in concrete terms.  That's my failing, the info is probably in the description and comments, it's just not sinking in.

I am willing to pursue this to the best of my ability, but I will admit in advance that my ability may not be quite enough.  I'm new to the committer role, which means that I don't work very fast and I'm still learning the ropes.  I think I can commit it and backport to 4.x if the following criteria are met:

*) We can get the feature to apply to trunk and consistently pass tests (not counting what's failing due to other problems).
*) There are new tests for all new functionality.
*) We put it up for review by other committers, particularly [~rcmuir] and [~yseeley@gmail.com], and there are no negative votes.

                
> 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-ALPHA
>            Reporter: Bill Bell
>            Priority: Minor
>             Fix For: 4.4
>
>         Attachments: SOLR-2242-3x_5_tests.patch, SOLR-2242-3x.patch, SOLR-2242.patch, SOLR-2242.patch, SOLR-2242.patch, SOLR-2242.shard.withtests.patch, SOLR-2242.solr3.1-fix.patch, SOLR-2242.solr3.1.patch, SOLR.2242.solr3.1.patch, SOLR-2242-solr40-3.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:
> Parameters:
> facet.numTerms or f.<field>.facet.numTerms = true (default is false) - turn on distinct counting of terms
> facet.field - the field to count the terms
> It creates a new section in the facet section...
> http://localhost:8983/solr/select?shards=localhost:8983/solr,localhost:7574/solr&indent=true&q=*:*&facet=true&facet.mincount=1&facet.numTerms=true&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.numTerms=false&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.numTerms=true&facet.limit=-1&facet.field=price
> This currently only works on facet.field.
> {code}
> <lst name="facet_counts">
> <lst name="facet_queries"/>
> <lst name="facet_fields">...</lst>
> <lst name="facet_numTerms">
> <lst name="localhost:8983/solr/">
> <int name="price">14</int>
> </lst>
> <lst name="localhost:8080/solr/">
> <int name="price">14</int>
> </lst>
> </lst>
> <lst name="facet_dates"/>
> <lst name="facet_ranges"/>
> </lst>
> OR with no sharding-
> <lst name="facet_numTerms">
> <int name="price">14</int>
> </lst>
> {code} 
> Several people use this to get the group.field count (the # of groups).

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