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https://issues.apache.org/jira/browse/LUCENE-1252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702520#action_12702520
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Michael McCandless commented on LUCENE-1252:
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Right, I think this is more about determining whether a doc is a hit or not,
than about how to compute its score.
I think somehow the scorer needs to return 2 scorers that share the underlying
iterators. The first scorer simply checks "AND"-ness with all other required
terms, and only if the doc passes those are the
positional/payloads/anything-else-expensive consulted.
> Avoid using positions when not all required terms are present
> -------------------------------------------------------------
>
> Key: LUCENE-1252
> URL: https://issues.apache.org/jira/browse/LUCENE-1252
> Project: Lucene - Java
> Issue Type: Wish
> Components: Search
> Reporter: Paul Elschot
> Priority: Minor
>
> In the Scorers of queries with (lots of) Phrases and/or (nested) Spans,
> currently next() and skipTo() will use position information even when other
> parts of the query cannot match because some required terms are not present.
> This could be avoided by adding some methods to Scorer that relax the
> postcondition of next() and skipTo() to something like "all required terms
> are present, but no position info was checked yet", and implementing these
> methods for Scorers that do conjunctions: BooleanScorer, PhraseScorer, and
> SpanScorer/NearSpans.
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