Avoid using positions when not all required terms are present
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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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