| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Isaac Morland <isaac(dot)morland(at)gmail(dot)com>, Gurjeet Singh <gurjeet(at)singh(dot)im>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Postgres Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Named Operators |
| Date: | 2023-01-12 18:37:48 |
| Message-ID: | CAKFQuwZ=UbohWky6if=GWq8eS4c+yK8M++=3ECa5gnPSM7EKfA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jan 12, 2023 at 10:14 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Isaac Morland <isaac(dot)morland(at)gmail(dot)com> writes:
> > What about backticks (`)? They are allowed as operator characters but do
> > not otherwise appear in the lexical syntax as far as I can tell:
> > https://www.postgresql.org/docs/current/sql-syntax-lexical.html
>
> Since they're already allowed as operator characters, you can't
> use them for this purpose without breaking existing use-cases.
>
>
IIUC, specifically the fact that an operator is defined to start with one
of those symbols and end at the first non-symbol. We can't change the
allowed set of non-symbols at this point, without defining something else
to denote the start of an operator.
David J.
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