Re: [17] collation provider "builtin"

On Thu, Jun 15, 2023 at 10:55 AM Jeff Davis <pgsql@j-davis.com> wrote:
> The locale "C" (and equivalently, "POSIX") is not really a libc locale;
> it's implemented internally with memcmp for collation and
> pg_ascii_tolower, etc., for ctype.
>
> The attached patch implements a new collation provider, "builtin",
> which only supports "C" and "POSIX". It does not change the initdb
> default provider, so it must be requested explicitly. The user will be
> guaranteed that collations with provider "builtin" will never change
> semantics; therefore they need no version and indexes are not at risk
> of corruption. See previous discussion[1].

I haven't studied the details yet but +1 for this idea.  It models
what we are actually doing.