Tatsuo Ishii <ishii@postgresql.org> writes:
> After thinking a little bit more, I think following patch would not
> break existing behavior and also adopts mutibyte + C locale case. What
> do you think?
This is still ignoring the point: arbitrarily changing the module's
longstanding standard behavior isn't acceptable. You need to provide
a way for the user to control the behavior. (Once you've done that,
I think it can be just either "alnum" or "!isspace", but maybe some
other behaviors would be interesting.)
regards, tom lane