XRANGE (Hexadecimal Range)
The XRANGE function returns a string of all valid 1-byte encodings (in ascending order) between and including the values start and end.
The default value for start is '00'x, and the default value
for end is 'FF'x. If start is greater than
end, the values wrap from 'FF'x to '00'x. If
specified, start and end must be single characters.
Examples
XRANGE('a','f') -> 'abcdef'
XRANGE('03'x,'07'x) -> '0304050607'x
XRANGE(,'04'x) -> '0001020304'x
XRANGE('i','j') -> '898A8B8C8D8E8F9091'x /* EBCDIC */
XRANGE('FE'x,'02'x) -> 'FEFF000102'x
