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From "Mark Harwood (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-2454) Nested Document query support
Date Wed, 22 Jun 2011 09:18:47 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053142#comment-13053142
] 

Mark Harwood commented on LUCENE-2454:
--------------------------------------

bq. Could that work for your use case?

Sounds like it, that's great :)
Do you think there any efficiencies to be gained on the document retrieve side of things if
you know that the documents commonly being retrieved are physically nearby i.e. an app will
often retrieve a parent's fields and then those from child docs which are required to be physically
located adjacent to the parent's data. Would existing lower-level caching in Directory or
the OS mean there's already a good chance of finding child data in cached blocks or could
a change to file structures and/or doc retrieve APIs radically boost parent-plus-child retrieve
performance?



> 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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