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From "Michael McCandless (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-3685) Add top-down version of BlockJoinQuery
Date Sat, 14 Jan 2012 16:17:39 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless resolved LUCENE-3685.
----------------------------------------

    Resolution: Fixed
    
> Add top-down version of BlockJoinQuery
> --------------------------------------
>
>                 Key: LUCENE-3685
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3685
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: modules/join
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3685.patch
>
>
> Today, BlockJoinQuery can join from child docIDs up to parent docIDs.
> EG this works well for product (parent) + many SKUs (child) search.
> But the reverse, which BJQ cannot do, is also useful in some cases.
> EG say you index songs (child) within albums (parent), but you want to
> search and present by song not album while involving some fields from
> the album in the query.  In this case you want to wrap a parent query
> (against album), joining down to the child document space.

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