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https://issues.apache.org/jira/browse/LUCENE-5487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918711#comment-13918711
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Paul Elschot commented on LUCENE-5487:
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I like this, lots of simplifications.
About this nocommit:
+ // nocommit add test verifying that BQ inside BQ can get BS1
+ // not BS2 like today
Iirc a BS1 inside a BS1 will work correctly because both use the same doc
intervals in which the unordered docs can occur.
I do not recall anyone reporting a problem with this with nested BQ's, but I
never tested it either.
And the doc interval might be increased (2048 now) to try and have even better
BS1 performance.
> Can we separate "top scorer" from "sub scorer"?
> -----------------------------------------------
>
> Key: LUCENE-5487
> URL: https://issues.apache.org/jira/browse/LUCENE-5487
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Attachments: LUCENE-5487.patch, LUCENE-5487.patch
>
>
> This is just an exploratory patch ... still many nocommits, but I
> think it may be promising.
> I find the two booleans we pass to Weight.scorer confusing, because
> they really only apply to whoever will call score(Collector) (just
> IndexSearcher and BooleanScorer).
> The params are pointless for the vast majority of scorers, because
> very, very few query scorers really need to change how top-scoring is
> done, and those scorers can *only* score top-level (throw throw UOE
> from nextDoc/advance). It seems like these two types of scorers
> should be separately typed.
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