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From "Karl Wettin (JIRA)" <>
Subject [jira] Commented: (LUCENE-1380) Patch for ShingleFilter.enablePositions
Date Fri, 12 Sep 2008 22:51:44 GMT


Karl Wettin commented on LUCENE-1380:

One could argue that what you should do rather than using this patch is to add a TokenFilter
that sets all positionIncrement to 0.

> Patch for ShingleFilter.enablePositions
> ---------------------------------------
>                 Key: LUCENE-1380
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>            Reporter: Michael Semb Wever
>            Assignee: Karl Wettin
>             Fix For: 2.4
>         Attachments: LUCENE-1380.patch, LUCENE-1380.patch
> Make it possible for *all* words and shingles to be placed at the same position.
> Default is to place each shingle at the same position as the unigram (or first shingle
if outputUnigrams=false). That is, each coterminal token has positionIncrement=1 and every
other token a positionIncrement=0. 
> This leads to a MultiPhraseQuery where at least one word/shingle must be matched from
each word/token. This is not always desired. 
> See for mailing list thread.

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