[jira] [Commented] (LUCENE-7960) NGram filters -- add option to keep short terms

["Ingomar Wesp (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-7960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16421621#comment-16421621 ] 

Ingomar Wesp commented on LUCENE-7960:
--------------------------------------

Thanks for your feedback! Yes, this is exactly the behavior I tried to implement. I'll rename the parameters according to your suggestion.

I will also have a look at the other ngram components as soon as I have time.

> NGram filters -- add option to keep short terms
> -----------------------------------------------
>
>                 Key: LUCENE-7960
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7960
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/analysis
>            Reporter: Shawn Heisey
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When ngram or edgengram filters are used, any terms that are shorter than the minGramSize are completely removed from the token stream.
> This is probably 100% what was intended, but I've seen it cause a lot of problems for users.  I am not suggesting that the default behavior be changed.  That would be far too disruptive to the existing user base.
> I do think there should be a new boolean option, with a name like keepShortTerms, that defaults to false, to allow the short terms to be preserved.



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