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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1682) Implement CollapseComponent
Date Tue, 17 Aug 2010 13:26:19 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12899401#action_12899401
] 

Yonik Seeley commented on SOLR-1682:
------------------------------------

bq. Groups are sorted by the first and most relevant document in a group.

Going back to a specific example... assuming we are sorting by price asc within a single group,
but sorting groups by popularity desc (however that's defined).
So we have 2 sane choices about what the popularity of a group is:
1) the popularity of a group is the lowest price doc (i.e. the first in the list for that
group).  - this is what you did
2) the popularity of a group is the max among all docs in that group

I wonder which will be more useful to people?  Do we need both?
#2 can be trivially implemented with the existing collectors (just use different sorts at
the different stages)

> Implement CollapseComponent
> ---------------------------
>
>                 Key: SOLR-1682
>                 URL: https://issues.apache.org/jira/browse/SOLR-1682
>             Project: Solr
>          Issue Type: Sub-task
>          Components: search
>            Reporter: Martijn van Groningen
>            Assignee: Shalin Shekhar Mangar
>             Fix For: Next
>
>         Attachments: field-collapsing.patch, SOLR-1682.patch, SOLR-1682.patch, SOLR-1682.patch,
SOLR-1682.patch, SOLR-1682_prototype.patch, SOLR-1682_prototype.patch, SOLR-1682_prototype.patch,
SOLR-236.patch
>
>
> Child issue of SOLR-236. This issue is dedicated to field collapsing in general and all
its code (CollapseComponent, DocumentCollapsers and CollapseCollectors). The main goal is
the finalize the request parameters and response format.

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