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Date: Fri, 17 Sep 2010 11:54:33 -0400 (EDT)
From: "Ryan McKinley (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2649) FieldCache should include a BitSet
 for matching docs
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    [ https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910640#action_12910640 ] 

Ryan McKinley commented on LUCENE-2649:
---------------------------------------

oh right -- thats true.  Is a global flag sufficient?  

In lucene it could default to false and in solr default to true.

I know we don't want to just keep adding more things to memory, but I'm not sure there is a huge win by selectively enabling and disabling some fields.

> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>
>                 Key: LUCENE-2649
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2649
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Ryan McKinley
>             Fix For: 4.0
>
>         Attachments: LUCENE-2649-FieldCacheWithBitSet.patch, LUCENE-2649-FieldCacheWithBitSet.patch
>
>
> The FieldCache returns an array representing the values for each doc.  However there is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a BitSet for all valid docs.

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