On 5 August 2015 at 14:52, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> The first compatibility item in the 9.5 release notes: we changed
> the precedence of IS and some other things. You need to be reading
> the 9.5 version of the precedence table.
Doh. Sorry, I'm an idiot.