RE: BUG #15516: Identifier not quoted with uppercase letter (spanish Ñ) doesn't get transformed to lowercase (ñ)

Thank you very much for your clarification, Tom. (Also, I'm very sorry for not ending and signing my previous message properly. Shame on me, having being Thanksgivig Day!)

I think I'll submit a correction mentioning that ("PG's downcasing transform is only applied to single-byte characters") for last paragraph on "4.1.1. Identifiers and Key Words" in the documentation which states:
- "[...] unquoted names are always folded to lower case"
- "If you want to write portable applications you are advised to always quote a particular name or never quote it"

Regards,
Paco Calvo

-----Mensaje original-----
De: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
Enviado el: jueves, 22 de noviembre de 2018 18:02
Para: Calvo Arias, Francisco <fcaa(at)tragsa(dot)es>
CC: pgsql-bugs(at)lists(dot)postgresql(dot)org
Asunto: Re: BUG #15516: Identifier not quoted with uppercase letter (spanish Ñ) doesn't get transformed to lowercase (ñ)

=?utf-8?q?PG_Bug_reporting_form?= <noreply(at)postgresql(dot)org> writes:
> When using an identifier not quoted which includes an uppercase letter
> (Spanish Ñ, Unicode U+00D1), it doesn't get transformed to lowercase
> (ñ, Unicode U+00F1) as expected.

PG's downcasing transform is only applied to single-byte characters.
So Ñ could be transformed in LATIN1 encoding, but not UTF8. There are various practical reasons why this is unlikely to change soon.

regards, tom lane

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