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https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913698#action_12913698
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Michael McCandless commented on LUCENE-2649:
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bq. If we have a separate getBits( field ) call, should the Bits be added to
the XxxValues class? I suspect not.
Yeah I think it need not be.
But, EntryCreator still should be able to state that it'd like the bits
computed & cached as a side effect? And, if the bits wasn't already computed,
then they'd be computed on-demand? (This enables caching only valid bits and
not the values array).
If we do this then we can leave cutover to XXXValues (still a good idea) as a
separate issue?
> 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,
> 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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