Erik Hatcher wrote:
2. How do I search for negative numbers in a range. For example
field:[-3 TO
2] ?
I don't mind hacking code such that my numbers are indexed as
+00000001 and
-00000001 and then I can override the query parser to change my
query to
[-0000003 TO +0000002]. However.. "+" is less then "-" in Ascii
terms so a
range search isn't going to work terrifically well.. Is there a
standard
approach??
You could leave the "+" off for positive numbers. That'd do the
trick, right? "-" < "0" lexicographically.
As Gwyn pointed out, that would make -3 > -2. Personally, I'd use
unsigned numbers and shift the range -- for 16 bit numbers I'd map
-32768..32767 to 0..65535 by adding 32768. I guess you could do that by
having overriding getRangeQuery() (LIA, p207 -- wonderful book).
jch
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