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From zhangchi <>
Subject Re: how to use DuplicateFilter to get unique documents based on a fieldName
Date Fri, 05 Mar 2010 01:06:11 GMT

i think you should check the index first.using the lukeall to see if there  
is the duplicate books.

On Thu, 04 Mar 2010 20:43:26 +0800, anisha@ekkitab <>  

> Hi there, Could someone help me with the usage of DuplicateFilters. Here  
> is
> my problem
> I have created a search index on book Id , title ,and author from a  
> database
> of books which fall under various categories. Some books fall under more
> than one category. Now, when i issue a search, I get back 'X' books  
> matching
> the search criteria, some of which are repeated, because that books are  
> in
> different documents and its the expected behaviour.
> I use the  TopFieldDocCollector . getTotalHits() to get the total count.  
> But
> this includes the repeats as mentioned above. This count is not the  
> actual
> count, Hence when I issue a search on title or author i want to get a  
> unique
> count / list of books. How do I use DuplicateFilter to acheive this.
> Please help
> Regards
> Anish

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