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https://issues.apache.org/jira/browse/LUCENE-6066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Harwood updated LUCENE-6066:
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Attachment: LUCENE-PQRemoveV5.patch
Added Junit test showing use with String based dedup keys using 2 lookup impls
- slow+accurate global ords and fast but potentially inaccurate hashing of
BinaryDocValues
> Collector that manages diversity in search results
> --------------------------------------------------
>
> Key: LUCENE-6066
> URL: https://issues.apache.org/jira/browse/LUCENE-6066
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/query/scoring
> Reporter: Mark Harwood
> Priority: Minor
> Fix For: 5.0
>
> Attachments: LUCENE-PQRemoveV5.patch
>
>
> This issue provides a new collector for situations where a client doesn't
> want more than N matches for any given key (e.g. no more than 5 products from
> any one retailer in a marketplace). In these circumstances a document that
> was previously thought of as competitive during collection has to be removed
> from the final PQ and replaced with another doc (eg a retailer who already
> has 5 matches in the PQ receives a 6th match which is better than his
> previous ones). This requires a new remove method on the existing
> PriorityQueue class.
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