"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Sat, Apr 9, 2022 at 7:43 AM Perry Smith <pedz@easesoftware.com> wrote:
>> All that to ask: is there a predictable ordering of constraints?
> I'm not aware of any documentation describing constraint evaluation order.
IIRC, triggers are specified to fire in name order. Uniqueness
constraints are not enforced by triggers though; I wouldn't care
to rely on the order in which those are checked.
regards, tom lane