Large Numeric RangeQueries

[Keegan Callin <kc...@kcallin.net>]

Hello and Good Day,

In my application of Lucene, I am must search through some fields that 
contain numbers with very large ranges on the order of 150000 or so.  
Suppose I wanted to retrieve all documents matching numbers 
10000-150000.  On first inspection I tried a RangeQuery but, of course, 
I quickly discovered that RangeQueries expand to boolean queries that 
enumerate every element in their range.  In my case, it does not seem 
realistic to enumerate all the possible values of the query range as 
RangeQuery tries to do.

It has widely been suggested on the web and in in Gospodnetic & 
Hatcher's venerable "Lucene In Action" that queries for date ranges be 
reduced to simpler terms by more-or-less rounding the dates to the 
minute, hour, or day.  Unfortunately, in my case the /whole/ number is 
significant and I cannot round the numbers.  Has anyone some suggestions 
as to how I might proceed?

Kindly,
Keegan Callin

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Re: Large Numeric RangeQueries

[markharw00d <ma...@yahoo.co.uk>]

On a related topic: yesterday I posted a round-up of all the possible 
filtering options in Lucene with timings and example code to the WIKI :

http://wiki.apache.org/jakarta-lucene/FilteringOptions

One of the options demonstrated is along the lines of Chris's suggestion.


Cheers,
Mark







	
	
		
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Re: Large Numeric RangeQueries

[Chris Hostetter <ho...@fucit.org>]

: 10000-150000.  On first inspection I tried a RangeQuery but, of course,
: I quickly discovered that RangeQueries expand to boolean queries that
: enumerate every element in their range.  In my case, it does not seem
: realistic to enumerate all the possible values of the query range as
: RangeQuery tries to do.

1) check out RangeFilter
2) check out ConstantScoreRangeQuery

http://svn.apache.org/viewcvs.cgi/lucene/java/trunk/src/java/org/apache/lucene/search/RangeFilter.java
http://svn.apache.org/viewcvs.cgi/lucene/java/trunk/src/java/org/apache/lucene/search/ConstantScoreRangeQuery.java


-Hoss


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