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From "Michael McCandless (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-1252) Avoid using positions when not all required terms are present
Date Tue, 20 Mar 2012 16:03:38 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-1252:
---------------------------------------

    Labels: gsoc2012 lucene-gsoc-12  (was: )
    
> 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: core/search
>            Reporter: Paul Elschot
>            Priority: Minor
>              Labels: gsoc2012, lucene-gsoc-12
>
> 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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