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https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910711#action_12910711
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Ryan McKinley commented on LUCENE-2649:
---------------------------------------
I like the idea of optionally caching the numdocs and unique values -- that
would make sorting by this field faster -- the ArrayValues class could be
easily augmented with this.
The problem with augmenting the Parser class as you suggest is that we would
have to rejiggy everything that touches parser. We would need different
default classes for things that want or don't want the missing records. How do
we handle this big:
{code:java}
if (parser == null) {
try {
return wrapper.getIntValues(reader, field, DEFAULT_INT_PARSER);
} catch (NumberFormatException ne) {
return wrapper.getIntValues(reader, field, NUMERIC_UTILS_INT_PARSER);
}
}
{code}
yuck
> 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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