Re: [v9.2] make_greater_string() does not return a string in some cases

On fre, 2011-09-23 at 20:35 +0300, Marcin Mańk wrote:
> One idea:
> col like 'foo%' could be translated to col >= 'foo' and col <= foo || 'zzz' , where 'z' is the largest possible
character.This should be good enough  for calculating stats.
 
> 
>  How to find such a character, i do not know.

That's what makes this so difficult.

If we knew the largest character, we could probably also find the
largest-1, largest-2, etc. characters and determine the total order of
everything.