[jira] [Created] (SOLR-5152) EdgeNGramFilterFactory deletes token

["Christoph Lingg (JIRA)" <ji...@apache.org>]

Christoph Lingg created SOLR-5152:
-------------------------------------

             Summary: EdgeNGramFilterFactory deletes token
                 Key: SOLR-5152
                 URL: https://issues.apache.org/jira/browse/SOLR-5152
             Project: Solr
          Issue Type: Improvement
    Affects Versions: 4.4
            Reporter: Christoph Lingg


I am using EdgeNGramFilterFactory in my schema.xml

{code:xml}<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
  <analyzer type="index">
    <!-- ... -->
    <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="10" side="front" />
  </analyzer>
</fieldType>{code}

Some tokens in my index only consist of one character, let's say {{R}}. minGramSize is set to 2 and is bigger than the length of the token. I expected the NGramFilter to left {{R}} unchanged but in fact it is deleting the token.

For my use case this interpretation is undesirable, and probably for most use cases too!?

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