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From: Álvaro Herrera <[email protected]>
To: Srinath Reddy Sadipiralla <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: BUG #19351: in pg18.1,when not null exists in the table , and add constraint problem.
Date: Thu, 11 Dec 2025 08:29:45 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAFC+b6q7xFQN=wRP0rOCLat=rWNNNhuhEKOUV-2BJ9HxU5SrAQ@mail.gmail.com>

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/[email protected]

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