Actually, as of Lucene 2.9 (if you can upgrade), you should use NumericField to index numerics and NumericRangeQuery to do range search/filter -- it all just works -- no more padding.
Mike On Wed, Jan 13, 2010 at 1:17 PM, Steven A Rowe <sar...@syr.edu> wrote: > Hi AlexElba, > > The problem is that Lucene only knows how to handle character strings, not > numbers. Lexicographically, "3" > "10", so you get the expected results > (nothing). > > The standard thing to do is transform your numbers into strings that sort as > you want them to. E.g., you can left-pad the "rank" field values with > zeroes: "03", "04", ..., "10", and then create a RangeFilter over "03" .. > "10". You will of course need to left-zero-pad to at least the maximum > character length of the largest rank. > > Facilities to handle this problem are available in NumberTools: > > <http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/document/NumberTools.html> > > (Note that NumberTools converts longs to base-36 fixed-length padded strings.) > > More info here: > > <http://wiki.apache.org/lucene-java/SearchNumericalFields> > > Steve > > On 01/13/2010 at 12:51 PM, AlexElba wrote: >> >> Hello, >> >> I am currently using lucene 2.4 and have document with 3 fields >> >> id >> name >> rank >> >> and have query and filter when I am trying to use rang filter on rank I >> am not getting any result back >> >> RangeFilter rangeFilter = new RangeFilter("rank", "3", "10", true, true); >> >> I have documents which are in this interval >> >> >> Any suggestion what am I doing wrong? >> >> Regards > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
