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Posted to dev@lucene.apache.org by "Alan Woodward (JIRA)" <ji...@apache.org> on 2018/03/12 12:13:00 UTC
[jira] [Updated] (LUCENE-3475) ShingleFilter should handle
positionIncrement of zero, e.g. synonyms
[ https://issues.apache.org/jira/browse/LUCENE-3475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Woodward updated LUCENE-3475:
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Attachment: LUCENE-3475.patch
> ShingleFilter should handle positionIncrement of zero, e.g. synonyms
> --------------------------------------------------------------------
>
> Key: LUCENE-3475
> URL: https://issues.apache.org/jira/browse/LUCENE-3475
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/analysis
> Reporter: Cameron
> Assignee: Alan Woodward
> Priority: Minor
> Labels: newdev
> Attachments: LUCENE-3475.patch, LUCENE-3475.patch
>
>
> ShingleFilter is creating shingles for a single term that has been expanded by synonyms when it shouldn't. The position increment is 0.
> As an example, I have an Analyzer with a SynonymFilter followed by a ShingleFilter. Assuming car and auto are synonyms, the SynonymFilter produces two tokens and position 1: car, auto. The ShingleFilter is then producing 3 tokens, when there should only be two: car, car auto, auto. This behavior seems incorrect.
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