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From BorisCallens <boris.call...@gmail.com>
Subject Re: get distinct values of one field from query
Date Fri, 27 Mar 2009 09:27:18 GMT

Thanks, I will have a look.


hossman wrote:
> 
> 
> : In my project I have a query that can possibly return several millions
> of
> : documents.
> : >From these documents I always want the unique values from a certain
> field.
> : For the sake of clarity we can take for example the "id" field.
> 
> what you are describing sounds similar to the general concept of "faceted 
> searching" also frequently discussed on teh mailing lists under the 
> question of "category counts" ... in your specific case however it seems 
> you don't care about the "counts" just the "categories" (ie: the distinct 
> set of values for a field across all matched documents)
> 
> given those search terms, i'm guessing you'll find more then enough 
> information on the basic approaches that can be taken to tackle a faceting 
> problem with any varient of Lucene.
> 
> 
> 
> -Hoss
> 
> 
> 

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