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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2760) optimize spanfirstquery, spanpositionrangequery
Date Sun, 14 Nov 2010 21:29:14 GMT
optimize spanfirstquery, spanpositionrangequery
-----------------------------------------------

                 Key: LUCENE-2760
                 URL: https://issues.apache.org/jira/browse/LUCENE-2760
             Project: Lucene - Java
          Issue Type: Improvement
            Reporter: Robert Muir
             Fix For: 3.1, 4.0


SpanFirstQuery and SpanPositionRangeQuery (SpanFirst is just a special case of this), are
currently inefficient.

Take this worst case example: SpanFirstQuery("the").
Currently the code reads all the positions for the term "the".

But when enumerating spans, once we have passed the allowable range we should move on to the
next document (skipTo)
 

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