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https://issues.apache.org/jira/browse/LUCENE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878782#action_12878782
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Mark Harwood commented on LUCENE-2454:
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bq. I wonder if potentially many places in Solr would have to be become aware
of this scheme
Supporting multiple doc types in this way can be a big modelling change. Not
everyone needs it so I suspect that may be a hard sell to the Solr crowd.
bq. Another nice thing about the parallel index is that the idf relevancy
factor stays clean
I have an "IDF compensating" wrapper query that takes care of that. It wraps a
child query to then wrap the Similarity class in use and adjusts IDF
calculations to be based on the number of documents of the required type. I'll
attach it here when I get a chance.
bq. Before I saw this issue, I was going to try something with SpanNearQuery
and the masking-field variant.
I went through a similar thought process around using position info to make
this stuff work. This child-doc approach used here seems the cleanest by far.
> Nested Document query support
> -----------------------------
>
> Key: LUCENE-2454
> URL: https://issues.apache.org/jira/browse/LUCENE-2454
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Search
> Affects Versions: 3.0.2
> Reporter: Mark Harwood
> Assignee: Mark Harwood
> Priority: Minor
> Attachments: LuceneNestedDocumentSupport-1.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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