On Tue, 18 Jun 2024 23:02:14 -0700
"David G. Johnston" <david.g.johnston@gmail.com> wrote:
> On Tuesday, June 18, 2024, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> > Yugo NAGATA <nagata@sraoss.co.jp> writes:
> > > On Tue, 18 Jun 2024 20:56:58 -0700
> > > "David G. Johnston" <david.g.johnston@gmail.com> wrote:
> > >> But it is neither a keyword nor an identifier.
> >
> > The lexer would be quite surprised by your claim that NULL isn't
> > a keyword. Per src/include/parser/kwlist.h, NULL is a keyword,
> > and a fully reserved one at that.
> >
> >
> >
>
> Can’t it be both a value and a keyword? I figured the not null constraint
> and is null predicates are why it’s a keyword but the existence of those
> doesn’t cover its usage as a literal value that can be stuck anywhere you
> have an expression.
I still wonder it whould be unnecessary to mention the case-insensitivity here
if we can say NULL is *also* a keyword.
Regards,
Yugo Nagata
> David J.
--
Yugo NAGATA <nagata@sraoss.co.jp>