BUG #3056: strange behave of CHECK constraint

The following bug has been logged online:

Bug reference: 3056
Logged by: Pavel Stehule
Email address: pavel(dot)stehule(at)hotmail(dot)com
PostgreSQL version: 8.3
Operating system: Linux
Description: strange behave of CHECK constraint
Details:

Hello,

check constraint doesn't work correct:

opeerator similar works well:

root=# select '233' not similar to '%[^0-9]%';
?column?
----------
t
(1 dka)

but:
root=# create table tt(a varchar check (a not similar to '%[0-9]%'));
CREATE TABLE
root=# insert into tt values('233');
ERROR: new row for relation "tt" violates check constraint "tt_a_check"

Regards
Pavel Stehule