Re: [PATCH] Expand character set for ltree labels
| От | Garen Torikian |
|---|---|
| Тема | Re: [PATCH] Expand character set for ltree labels |
| Дата | |
| Msg-id | CAGXsc+-jhKJvSaqTWYa_PkrmA0ANWPfpte41ijwYpUjx7GNrHQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [PATCH] Expand character set for ltree labels (Nathan Bossart <nathandbossart@gmail.com>) |
| Список | pgsql-hackers |
No, not quite.
Valid Punycode characters are `[A-Za-z0-9-]`. This proposal includes `-`, as well as `#` and `;` for HTML entities.
I double-checked the RFC to see the valid Punycode characters and the set above is indeed correct: https://datatracker.ietf.org/doc/html/draft-ietf-idn-punycode-02#section-5
While it would be nice for ltree labels to support *any* printable character, it can't because symbols like `!` and `%` already have special meaning in the querying. This proposal leaves those as is and does not depend on any existing special character.
On Tue, Oct 4, 2022 at 6:32 PM Nathan Bossart <nathandbossart@gmail.com> wrote:
On Tue, Oct 04, 2022 at 12:54:46PM -0400, Garen Torikian wrote:
> The punycode range of characters is the exact same set as the existing
> ltree range, with the addition of a hyphen (-). Within this system, any
> human language can be encoded using just A-Za-z0-9-.
IIUC ASCII characters like '!' and '<' are valid Punycode characters, but
even with your proposal, those wouldn't be allowed.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
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