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https://issues.apache.org/jira/browse/LUCENE-8103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17052064#comment-17052064
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Michele Palmia commented on LUCENE-8103:
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Why would a Scorer offer a fast TwoPhaseIterator but not serve it (repackaged
as DocIdSetIterator) when asked for a simple old-school iterator()? In my
naivety, I would expect that in case a fast TPI is implemented, it would always
be served when clients call iterator() too.
In case that's not the case, and an explicit repackage is useful, here's my
patch.
[^LUCENE-8103.patch]
> QueryValueSource should use TwoPhaseIterator
> --------------------------------------------
>
> Key: LUCENE-8103
> URL: https://issues.apache.org/jira/browse/LUCENE-8103
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/other
> Reporter: David Smiley
> Priority: Minor
> Attachments: LUCENE-8103.patch
>
>
> QueryValueSource (in "queries" module) is a ValueSource representation of a
> Query; the score is the value. It ought to try to use a TwoPhaseIterator
> from the query if it can be offered. This will prevent possibly expensive
> advancing beyond documents that we aren't interested in.
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