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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4880) Difference in offset handling between IndexReader created by MemoryIndex and one created by RAMDirectory
Date Tue, 26 Mar 2013 14:59:15 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614086#comment-13614086
] 

Robert Muir commented on LUCENE-4880:
-------------------------------------

I also think its stupid you get 0640 as a token by itself in any case. I dont agree with the
unicode property of "letter" for this character as that doesnt makes sense to me, in my opinion
it should be "format". I sure hope there is some good reason for this, but to me its crazy.
                
> Difference in offset handling between IndexReader created by MemoryIndex and one created
by RAMDirectory
> --------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-4880
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4880
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 4.2
>         Environment: Windows 7 (probably irrelevant)
>            Reporter: Timothy Allison
>         Attachments: MemoryIndexVsRamDirZeroLengthTermTest.java
>
>
> MemoryIndex skips tokens that have length == 0 when building the index; the result is
that it does not increment the token offset (nor does it store the position offsets if that
option is set) for tokens of length == 0.  A regular index (via, say, RAMDirectory) does not
appear to do this.
> When using the ICUFoldingFilter, it is possible to have a term of zero length (the \u0640
character separated by spaces).  If that occurs in a document, the offsets returned at search
time differ between the MemoryIndex and a regular index.  

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