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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2013/04/29 22:18:16 UTC

[jira] [Resolved] (LUCENE-4964) Allow custom drill-down sub-queries

     [ https://issues.apache.org/jira/browse/LUCENE-4964?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-4964.
----------------------------------------

    Resolution: Fixed
    
> Allow custom drill-down sub-queries
> -----------------------------------
>
>                 Key: LUCENE-4964
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4964
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/facet
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 5.0, 4.4
>
>         Attachments: LUCENE-4964.patch
>
>
> Today the facet module indexes a term for each facet added to a
> document, and DrillDown/SidewaysQuery assume this by creating a
> TermQuery, or OR of TermQuery, for each dimension the app drills down
> on.
> I think we should relax this and allow an [expert] arbitrary query to
> drill down on a given dimension ... e.g., this can enable future
> dynamic faceting methods, or custom app drill-down methods.
> It's easy for DrillDownQuery to do this, but requires generalization
> in DrillSideways, basically just reviving the first approach on
> LUCENE-4748.  This approach is somewhat slower, but more general
> ... it will keep using the current method as an optimization when it
> applies.
> This should also fix the possible performance regression from
> LUCENE-4952 when scoreSubDocsAtOnce is true, by using the
> MinShouldMatchSumScorer in that case.

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