[jira] [Resolved] (LUCENE-6900) Grouping sortWithinGroup should use Sort.RELEVANCE to indicate that, not null

["David Smiley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Smiley resolved LUCENE-6900.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 5.5

> Grouping sortWithinGroup should use Sort.RELEVANCE to indicate that, not null
> -----------------------------------------------------------------------------
>
>                 Key: LUCENE-6900
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6900
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/grouping
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Minor
>             Fix For: 5.5
>
>         Attachments: LUCENE_6900.patch, LUCENE_6900.patch
>
>
> In AbstractSecondPassGroupingCollector, {{withinGroupSort}} uses a value of null to indicate a relevance sort.  I think it's nicer to use Sort.RELEVANCE for this -- after all it's how the {{groupSort}} variable is handled.  This choice is also seen in GroupingSearch; likely some other collaborators too.
> [~martijn.v.groningen] is there some wisdom in the current choice that escapes me?  If not I'll post a patch.



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