Re: lower() silently fails for 9.5.3 on Windows, but works on Mac, Linux

Alexander Farber <alexander.farber@gmail.com> writes:
> More info:
> # \l+

>    Name    |  Owner  | Encoding | Collate | Ctype |
> -----------+---------+----------+---------+-------+
>  postgres  | user1   | UTF8     | C       | C     |
>  template0 | user1   | UTF8     | C       | C     |
>            |         |          |         |       |
>  template1 | user1   | UTF8     | C       | C     |
>            |         |          |         |       |
>  words     | user1   | UTF8     | C       | C     |

Well, there's your problem: in C locale, only the standard ASCII letters
will be transformed by upper/lower.

            regards, tom lane