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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656486#action_12656486
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Michael McCandless commented on LUCENE-1483:
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{quote}
> But if you are using the old one it wont work with the new Searcher methods?
> I guess I'll have to think about it some more.
{quote}
I think the search methods, on seeing that there is a SortField.CUSTOM type and
then seeing that it's a SortComparatorSource in there, would fallback to the
current impl, but all other Sorts would use the new one?
{quote}
> if a bunch of ords already in the queue map to the same index, they need to
> be adjusted to be in order
{quote}
Hmmm! Perhaps on comparing two "odd" values that are the same we could
fallback to a true String.compareTo (I don't like that added if, though, it
should be rare). Or, better, we could add a "subord" to break the tie. That
subord'd have to be computed by gathering all String values that sorted to the
same "odd ord" and sorting them to assign subords.
> Change IndexSearcher to use MultiSearcher semantics for multiple subreaders
> ---------------------------------------------------------------------------
>
> Key: LUCENE-1483
> URL: https://issues.apache.org/jira/browse/LUCENE-1483
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch,
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch
>
>
> FieldCache and Filters are forced down to a single segment reader, allowing
> for individual segment reloading on reopen.
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