Harald Fuchs <hf0923x@protecting.net> writes:
>> Tom Lane wrote:
>>> Unfortunately, that already has a meaning, and it's not that.
> How about '{a, \N, b}'?
That's valid syntax too, ie, adopting that syntax would break
applications that are not broken today.
Not to mention that it would be gratuitously different from the notation
for NULLs in composite-type literals.
regards, tom lane