Horton

Re: BUG #19351: in pg18.1,when not null exists in the table , and add constraint problem.

Álvaro Herrera <alvherre@kurilemu.de>

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From: Álvaro Herrera <alvherre@kurilemu.de>
To: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
Cc: msdnchina@163.com, pgsql-bugs@lists.postgresql.org
Date: 2025-12-11T07:29:45Z
Lists: pgsql-bugs 
On 2025-Dec-10, Srinath Reddy Sadipiralla wrote:

> ah... just after a quick code lookup, remembered that
> "not null" is treated as a column property, which is a
> flag in pg_attribute catalog table named as "attnotnull",

This is no longer true in 18.
https://www.enterprisedb.com/blog/changes-not-null-postgres-18

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"Fundamental layering violations tend to bite you on tender
parts of your anatomy."                          (Tom Lane)
https://postgr.es/m/2818249.1748706121@sss.pgh.pa.us