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From Uri Boness <>
Subject Re: how to do auto-suggest case-insensitive match and return original case field values
Date Tue, 08 Dec 2009 20:18:27 GMT
Just updated SOLR-1625 to support regexp hints.


Chris Hostetter wrote:
> : In my web application I want to set up auto-suggest as you type
> : functionality which will search case-insensitively yet return the original
> : case terms.  It doesn't seem like TermsComponent can do this as it can only
> : return the lowercase indexed terms your are searching against, not the
> 	...
> : which provides useful sorting by and returning of term frequency counts in
> : your index.  How does one get this same information with regular Solr Query? 
> : I set up the following prefix query, searching by the indexed lowercased
> : field and returning the other:
> The type of approach you are describing (doing a prefix based query for 
> autosuggest) probably won't work very well unless your index is 100% 
> designed just for the autosuggest ... if it's an index about products, and 
> you're just using one of hte fields for autosuggest, you aren't going to 
> get good autosuggest results because the same word is going to appear in 
> multiple products.  what you need is an index of *words* that you want to 
> autosuggest, with fields indicating how important those words are that you 
> can use in a function query (this replaces the term freq that 
> TermComponent would use)
> the fact that your "test" field is multivalued and stores widly different 
> things in each doc is an example of what i mean.
> Have you considered the possibility of just indexing the lowercase value 
> concatenated with the regular case value using a special delimiter, and 
> ten returning to your TermComponent based solution?  index "PowerPoint" 
> as "powerpoint|PowerPoint" and just split on the "\" character when you 
> get hte data back from your prefix based term lookup.
> -Hoss

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