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https://issues.apache.org/jira/browse/LUCENE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052644#comment-13052644
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Michael McCandless commented on LUCENE-2454:
--------------------------------------------

bq. A variant of prevSetBit could take this largest known child as an argument 
to limit its search,

I think we should not require the app to "know" the max number of children per 
parent?  (Ie, we should just grow buffers, etc., on demand as we collect).

I mean, if this information is easily available we could optimize for that 
case, but for some apps it's a good amount of work to record this and update it 
so I don't think it should be a required arg when creating the 
query/collectors, even though it's tempting ;)

> Nested Document query support
> -----------------------------
>
>                 Key: LUCENE-2454
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2454
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: core/search
>    Affects Versions: 3.0.2
>            Reporter: Mark Harwood
>            Assignee: Mark Harwood
>            Priority: Minor
>         Attachments: LUCENE-2454.patch, LUCENE-2454.patch, 
> LuceneNestedDocumentSupport.zip
>
>
> A facility for querying nested documents in a Lucene index as outlined in 
> http://www.slideshare.net/MarkHarwood/proposal-for-nested-document-support-in-lucene

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