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https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910660#action_12910660
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Mark Miller commented on LUCENE-2649:
-------------------------------------
bq. I was suggesting handling it the same way as FieldCache.Parser - it's set
on the SortField. But instead of just being able to control parsing of a term
(which is too limited), it needs to be able to control everything. (This would
solve Shai's needs too)
We started down this path with LUCENE-831 - you could pass some *UnInverter on
the sort field if i remember right, so that pretty much everything could be
overridden. It has come up a lot - we really need this level of customizability
eventually.
> 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, 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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