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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12657330#action_12657330
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Michael McCandless commented on LUCENE-1483:
--------------------------------------------
{quote}
> the binary search gives back -insertionpoint - 1, the insertion point for
> banana is 1, so -1 -1 = -2. So I reverse that and subtract 2 to get 0 right?
> It lands on apple.
{quote}
Hmm -- I didn't realize binarySearch is returning the insertion point on a
miss. So your logic (negate then subtract 2) makes perfect sense now.
Just be sure... maybe you should temporarily add asserts when a negative index
is returned that values[-index-2].compareTo(newValue) < 0 and values[-index-1]
> 0 (making sure those array accesses are in bounds)?
{quote}
> (I dont remember off hand why subord has to start at 1 not 0, but i remember
> it didnt work otherwise)
{quote}
This is very important -- that 1 is "equivalent" to the original 0.5 proposal,
ie, think of subord as the 2nd digit in a 2-digit number. That 2nd digit being
non zero is how we know that even though banana's ord landed on apple's, banana
is in fact *not* equal to apple (because the subord for banana is > 0) and is
instead *between* apple and orange.
> 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,
> 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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