Re: support for DIN SPEC 91379 encoding

On 2022-Mar-27, Ralf Schuchardt wrote:

> where did you read, that this DIN SPEC 91379 norm is incompatible with UTF-8?
> 
> In the document „String.Latin+ 1.2: eine kommentierte und erweiterte
> Fassung der DIN SPEC 91379. Inklusive einer umfangreichen Liste häufig
> gestellter Fragen. Herausgegeben von der Fachgruppe String.Latin“
> linked here https://www.xoev.de/downloads-2316#StringLatin it is said,
> that the spec is a strict subset of unicode (E.1.6), and it is also
> mentioned in E.1.4, that in UTF-8 all unicode characters can be
> encoded. Therefore UTF-8 can be used to encode all DIN SPEC 91379
> characters.

So the remaining question is whether DIN SPEC 91379 requires an
implementation to support character U+0000.  If it does, then PostgreSQL
is not conformant, because that character is the only one in Unicode
that we don't support.  If U+0000 is not required, then PostgreSQL is
okay.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/