On 29-10-2018 02:06, Helen Borrie helebor@...
[firebird-support] wrote:

> Character set NONE is a bare-bones ASCII set and does not provide
> intrinsic support for any characters beyond the 128 characters that
> provide the US-Ascii upper and lower case, numerals and the basic
> diacritic symbols. You can store anything in charset NONE but nothing
> in the least useful can be done with those incompatible characters.

NONE only means store the bytes accepted and return them as is, and if a
connection character set is specified, try to convert the stored bytes
to that character set. It does not mean or assume ASCII at all. It just
happens that most (all?) Firebird supported character sets (including
UTF-8) use ASCII as the base for the first 128 characters.

Mark

--
Mark Rotteveel