On Wed, 23 Jun 2021 at 02:00, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> (I'd suspected something of the kind, but being caffeine-deprived I'd
> first added "alias3.* IS NULL" to the query, which of course fails to
> expose the difference. Thanks SQL.)
>
> In short, I see no bug here. It is kind of obscure though.
Oh right. Thanks for looking.
David