> -----Original Message-----
> From: Peter Eisentraut [mailto:peter_e@gmx.net]
>
> Hiroshi Inoue writes:
>
> > Isn't 'a' LIKE 'A' if 'a' = 'A' ?
>
> Yes. But 'a' <> 'A'.
Please look at my first question. This depends on the assumption that '=' is equivalent in any locale. Is it
guaranteed? For example, ( 'a' = 'A' ) isn't allowed in any locale ?.
And your answer was The whole point here is not to rely on '='.
Clearly your theory depends on the assumption that If a = b in some locale then a = b in ASCII locale.
And where does 'a' <> 'A' come from ?
The definition of '=' is a part of collating sequence.
>
> > LIKE seems to use the collating sequence.
>
> No. The collating sequence defines the order of all possible strings.
> LIKE doesn't order anything.
Again where does it come from ?
regards,
Hiroshi Inoue
