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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2317) allow separate control of whether docTermFreq and positions are indexed
Date Sat, 13 Mar 2010 15:02:27 GMT
allow separate control of whether docTermFreq and positions are indexed
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                 Key: LUCENE-2317
                 URL: https://issues.apache.org/jira/browse/LUCENE-2317
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Index
            Reporter: Michael McCandless
             Fix For: 3.1


[Spinoff of LUCENE-2308... we keep spinning things off... I feel like we live inside a particle
accelerator]

Right now Lucene indexes the docTermFreq and positions into the postings, by default.

You can use omitTFAP to turn them both off, which if you also omit norms gives you "match
only" scoring.

But, really, they ought to be separately controllable -- one may want to include docTermFreq
but not positions, to get full scoring for non-positional phrases.

Probably we should wait until LUCENE-2308 is done, and make the API change on *FieldType.

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