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From Tomer Gabel <to...@tomergabel.com>
Subject Re: Order the index by timestamp field and Get n documents
Date Sun, 16 Nov 2008 10:28:15 GMT

Possibly the fastest way to do this is to use a sortable timestamp field
(e.g. padded long) and use a TermEnumerator, which always gives a
lexicographically-sorted enumeration. Since you'd probably prefer a "most
recent" policy you may need to come up with a reverse-timestamp scheme (e.g.
instead of zero-padded "milliseconds since epoch" you may prefer zero-padded
"milliseconds 'till year 3000" values).

Lucene doesn't handle this type of queries very efficiently, however, so you
may prefer an SQL database instead (or in addition).
--TG

 


Cool The Breezer wrote:
> 
> Hi,
>    In my index, there is a field called timestamp which is long value of
> date. I am  trying to get sort all documents by timestamp and get N
> documents. 
> I am trying to find a way to create a query like "timestamp > 0" and then
> order the result by timestamp and get N fields. However I am not able to
> do that. Suggest me the best way. Or there are any lowlevel method
> available for the same.
> 
> I am using Lucene 2.3.1 and looking into method search(Weight weight,
> Filter filter, int nDocs, Sort sort) in IndexSearcher. Trying to know how
> to create a Weight object.
> 
> Anyway, I would really appreciate your suggestion....
> 
> -RB
> 
> 
>       
> 
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> 


-----
--

http://www.tomergabel.com Tomer Gabel 


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