Hello Charles, unfortunately on Windows 7 this fails:
psql (9.5.3)
Type "help" for help.
# select lower(('И'::text collate "en_US")) ;
ERROR: collation "en_US" for encoding "UTF8" does not exist
LINE 1: select lower(('?'::text collate "en_US")) ;
^
By the way I the following code works well for me on all 3 platforms:
CREATE TABLE words_verbs (
word varchar(255) PRIMARY KEY CHECK (
word ~ '^[А-Я]{2,}$' AND
word !~ '[ЖШ]Ы' AND
word !~ '[ЧЩ]Я' AND
word !~ 'Ц[ЮЯ]' AND
(word ~ '[ТЧ]ЬСЯ$' OR
word ~ '[ТЧ]Ь$' OR
word ~ 'ТИ$')),
hashed varchar(32) NOT NULL
);
but I understand that it is probably different methods on the lower layer
(pcre instead of some collating functions?)....
Regards
Alex
