On Mon, 28 Oct 2019 at 07:39, Eugen Konkov <kes-kes(at)yandex(dot)ru> wrote:
If we should follow this form, then IS DISTINCT should be written as:
> x =! y
> This looks unusual, because JavaScript also follow != form. so I hope
> it will be easy to detect/implement != form, which I used to read as:
> negate the result of comparison
>
Postgres already allows != as a synonym for <>. I think having =! mean
something subtly but significantly different is a terrible idea. At a
minimum we would have to remove the synonym, which would be a backwards
compatibility break.