Re: global / super barriers (for checksums)

Hi,

On 2019-12-11 13:35:26 -0500, Robert Haas wrote:
> While I have passionate philosophical feelings about this topic, for
> purposes of the present thread the really important question (IMV,
> anyway) is whether there's any way of getting a patch for global
> barriers committed in advance of the first user of such barriers.

Right. I think there is.

> If not, then I guess we'll need to decide which of checksum
> enable/disable and ALTER SYSTEM READ ONLY is going to go first and
> commit this only when that patch is ready to go as well. Or, I
> suppose, commit it with a dummy placeholder that then gets replaced by
> whichever patch goes first, but I'm not sure whether people would be
> OK with that.

I'd either add a test (if we have some) or placeholder kind
initially. But I'd also be ok with going for either of the other
versions directly - but it seems harder to tackle the patches together.

Greetings,

Andres Freund