On 10/30/06, KEGan <[EMAIL PROTECTED]> wrote:
Newbie question. How do we index floating point number in Lucene, so that it
is sortable ? There is a built-in utility class 'NumberTools' which help
with indexing integer. Does Lucene has the same mechanism for floating point
number?

You can look at NumberUtils in Solr, it has conversions for
int/long/float/double that make strings that sort correctly (for range
queries as well as sorts).  If you use Solr, these transformations are
automatically applied during indexing and querying depending on the
declared type of the field.

http://svn.apache.org/viewvc/incubator/solr/trunk/src/java/org/apache/solr/util/NumberUtils.java?view=markup

-Yonik
http://incubator.apache.org/solr Solr, the open-source Lucene search server

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