Re: Range type adaptation implemented

On Mon, Sep 24, 2012 at 09:56:14AM +0100, Daniele Varrazzo wrote:

> The funniest surprise I've had during the development
> was an error creating the object TextRange('#', '$') in the database.
> It should be possible as
>
> >>> ord('#'), ord('$')
> (35, 36)
>
> but PG insisted that "range lower bound must be less than or equal to
> range upper bound". Well, turns out that:
>
> postgres=# select ascii('#') < ascii('$'), '#' < '$';
> ?column? | ?column?
> ----------+----------
> t | f
> (1 row)

This does not seem intuitive but is probably quite logical:

While

ascii('#') < ascii('$')

eventually compares numerical values (35 and 36) the comparison

'#' < '$'

operates on characters the sorting order (<) of which
depends on the lcoale in use.

Karsten
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