It sounds like you want to get a list of "brands" that start with a particular string, out of your index. But your index is based on products, not brands. Is that correct?
If so, that has nothing to do with NGrams (or even tokenizing for that matter) I think you should be doing a Facet query instead of a standard query. Take a look at Facets on the Solr Wiki. http://wiki.apache.org/solr/SolrFacetingOverview -Todd Feak -----Original Message----- From: Jeff Newburn [mailto:jnewb...@zappos.com] Sent: Wednesday, December 24, 2008 7:39 AM To: solr-user@lucene.apache.org Subject: Ngram Repeats I have set up an ngram filter and have run into a problem. Our index is basically composed of products as the unique id. Each product also has a brand name assigned to it. There are much fewer unique brand names than products in the index. I tried to set up an ngram based on the brand name but it is returning the same brand name over and over for each product. Essentially if you try for the brand name starting with ³as² you will get the brand ³asus² 15 times. Is there a way to make the ngram only return unique brand name? I have attached the configuration below. <fieldType name="prefix_token" class="solr.TextField" positionIncrementGap="1"> <analyzer type="index"> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <filter class="solr.LowerCaseFilterFactory" /> <filter class="solr.EdgeNGramFilterFactory" minGramSize="1" maxGramSize="20"/> </analyzer> <analyzer type="query"> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <filter class="solr.LowerCaseFilterFactory" /> </analyzer> </fieldType> -Jeff
