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From "Eks Dev (JIRA)" <>
Subject [jira] Created: (LUCENE-1340) Make it posible not to include TF information in index
Date Fri, 18 Jul 2008 22:39:31 GMT
Make it posible not to include TF information in index

                 Key: LUCENE-1340
             Project: Lucene - Java
          Issue Type: New Feature
          Components: Index
            Reporter: Eks Dev
            Priority: Minor

Term Frequency is typically not needed  for all fields, some CPU (reading one VInt less and
one X>>>1...) and IO can be spared by making pure boolen fields possible in Lucene.
This topic has already been discussed and accepted as a part of Flexible Indexing... This
issue tries to push things a bit faster forward as I have some concrete customer demands.

benefits can be expected for fields that are typical candidates for Filters, enumerations,
user rights, IDs or very short "texts", phone  numbers, zip codes, names...

Status: just passed standard test (compatibility), commited for early review, I have not tried
new feature, missing some asserts and one two unit tests

Complexity: simpler than expected

can be used via omitTf() (who used omitNorms() will know where to find it :)  

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