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Posted to dev@lucene.apache.org by "Steve Rowe (JIRA)" <ji...@apache.org> on 2013/04/22 16:51:16 UTC
[jira] [Resolved] (LUCENE-4810) Positions are incremented for each
ngram in EdgeNGramTokenFilter
[ https://issues.apache.org/jira/browse/LUCENE-4810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Rowe resolved LUCENE-4810.
--------------------------------
Resolution: Fixed
Committed fix to insure first token position increment > 0, to trunk, branch_4x, and lucene_solr_4_3.
> Positions are incremented for each ngram in EdgeNGramTokenFilter
> ----------------------------------------------------------------
>
> Key: LUCENE-4810
> URL: https://issues.apache.org/jira/browse/LUCENE-4810
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Reporter: Walter Underwood
> Assignee: Michael McCandless
> Fix For: 5.0, 4.3
>
> Attachments: LUCENE-4810.diff, LUCENE-4810-first-token-position-increment.patch, LUCENE-4810.patch, LUCENE-4810.patch
>
>
> Edge ngrams should be like synonyms, with all the ngrams generated from a token having the same position as that original token. The current code increments position.
> For the text "molecular biology", the query "mol bio" should match as a phrase in neighboring positions. It does not.
> You can see this in the Analysis page in the admin UI.
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