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https://issues.apache.org/jira/browse/SOLR-6032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kuntal Ganguly closed SOLR-6032.
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Resolution: Duplicate
> NgramFilter dont keep token less than mingram size or greater than maxgram
> size
> -------------------------------------------------------------------------------
>
> Key: SOLR-6032
> URL: https://issues.apache.org/jira/browse/SOLR-6032
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 4.2.1, 4.6.1
> Environment: Ubuntu12.04,4GB RAM, Quadcore Processor
> Reporter: Kuntal Ganguly
> Labels: build, patch
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> I have a requirement for partial and exact type.Now partial search work fine
> for NgramFilter within mingram & maxgram size range. Now when im trying to
> index a value less than mingram size,the tokens are not generated .Same
> things happens when the value is greater than maxgramsize.
> I haveto created a field type as shown below:
> <fieldType name="text_ngram" class="solr.TextField"
> positionIncrementGap="100">
> <analyzer type="query">
> <tokenizer class="solr.KeywordTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> </analyzer>
> <analyzer type="index">
> <tokenizer class="solr.KeywordTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="solr.NGramFilterFactory" minGramSize="3"
> maxGramSize="6" preserveOriginal="true"/>
> </analyzer>
> </fieldType>
> when i'm trying to index a value say AB (it is not indexed and not
> searchable). Similarly if the value is GangulyKuntal (which is greater than
> maxgram size),the search is not working.
> **Increasing maxgram size to more than the anticipated value is not good
> design aspect.
> NgramFilter should keep the original tokens if it is less than mingram or
> greater than maxgram. By doing this it will make it truly partial as well as
> exact search solution.It would really be very helpful,if this changes are
> made in the coming release. Any suggestion will be of great help?
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