po 19. 10. 2020 v 3:18 odesílatel Celso Lorenzetti <celso@sysrs.com.br> napsal:
Hi Peter,
is language C standart..
On 2020-10-17 20:51:36 +0200, Matthias Apitz wrote: > El día sábado, octubre 17, 2020 a las 03:37:46p. m. -0300, Celso Lorenzetti escribió: > > > Somebody help me, please. > > > > How to make the texts are aligned with 10 characters? > > > > > > > > elog(INFO, "\n%-10s Fim\n%-10s Fim\n", "Variável", "Variavel");
Which programming language is this? PL/pgSQL?
This is an internal function available in internal C API.
As Tom Lane said in other mail - this internal API just doesn't support alignment for multibyte encodings.
Regards
Pavel
> Hola Celso, > > You can reproduce the same on the UNIX shell with: > > $ printf "\n%-10s Fim\n%-10s Fim\n" "Variável" "Variavel" > > Variável Fim > Variavel Fim
> The second test (changing the accented char 'á' by 'X'), shows that > the problem/bug is a) more generic, not only in PostgreSQL and b) has > todo with being the UTF-8 char 'á' a two byte char, while 'X' is only > one byte.
Yes, determining how much space a UTF-8 sequence occupies on screen is surprisingly hard. I'm not sure what the C standard says about that. But these days I would expect any programming language to get it right at least for the simple cases.
hp
-- _ | Peter J. Holzer | Story must make more sense than reality. |_|_) | | | | | hjp@hjp.at | -- Charles Stross, "Creative writing __/ | http://www.hjp.at/ | challenge!"