See Solr's faceting capabilities. http://lucene.apache.org/solr and
the wiki from there. Faceting is built right in.
On Dec 16, 2008, at 3:53 PM, RobertV wrote:
Does anyone know how to retrieve aggregated results from lucene? Is is
possible to do something similar to this SQL statement below, which
returns
the numbers of books for each author for books published in 2007-2008?
select count(*), author_name
from book
where published_date >= '2007-01-01'
and published_date <= '2008-12-31'
group by author_name
Note: I do NOT want to loop through every document to get these
totals.
Also note the "group by" and I am using two fields (author_name and
published_date) so a simple TermEnum does not cut it.
Thanks.
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--------------------------
Grant Ingersoll
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http://wiki.apache.org/lucene-java/BasicsOfPerformance
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