Robert Haas <robertmh...@gmail.com> writes: > On Wed, Apr 13, 2016 at 1:36 PM, Robert Haas <robertmh...@gmail.com> wrote: >> I tend to favor zeroes rather than NULLs, because that's what we >> typically use to represent an invalid value of those types, and I'm >> not aware of any current case where those values are NULL.
> In fact, see heap_attisnull. Right, a table's system columns cannot be null at the table-scan level. (But they could go to null above an outer join.) regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers