Re: Bug in documentation: https://www.postgresql.org/docs/current/spi-examples.html

I’d vote for showing both (with RETURNING and without), since without it the second argument to SPI_exec has no effect in this example, which may not be obvious. That seems to be one of the subtle points illustrated by this example.

> On Jul 17, 2023, at 7:36 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> "David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
>>> On Mon, Jul 17, 2023 at 6:22 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> I think his point is that this example does not behave as the
>>> documentation claims. Which it does not, according to my
>>> tests here. I find this a bit disturbing --- did we intentionally
>>> change the behavior of SPI_exec somewhere along the line?
>
>> Appears to be a documentation fix oversight back in v9.0
>> https://github.com/postgres/postgres/commit/2ddc600f8f0252a0864e85d5cc1eeb3b9687d7e9
>
> Ah, thanks for the pointer. I'd just been trying to bisect where
> between 8.4 and 9.0 it changed, but failed because early-9.0 versions
> don't build at all with current bison :-(
>
> Anyway, given that the example needs updating, how should we do that
> exactly? Is it worth demonstrating both the behavior with RETURNING
> and that without? If not, which one to show?
>
> regards, tom lane