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From: Alvaro Herrera <[email protected]>
To: jian he <[email protected]>
Cc: Rushabh Lathia <[email protected]>
Cc: Ashutosh Bapat <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Support NOT VALID / VALIDATE constraint options for named NOT NULL constraints
Date: Mon, 17 Mar 2025 12:23:25 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CACJufxEOMEuG5gY-x9tHoa+BZx7_+rJnuh5eSWx3r2tBMThu3w@mail.gmail.com>

On 2025-Mar-17, jian he wrote:

> hi.
> I played around with it.
> 
> current syntax, we don't need to deal with column constraint grammar.
> like the following can fail directly:
> create table t0(a int constraint nn not null a not valid);
> we only support table constraint cases like:
> alter table lp add constraint nc1 not null a not valid;
> 
> since CREATE TABLE with invalid constraint does not make sense, so
> we can just issue a warning. like:
> create table t0(a int, constraint nn not null a not valid);
> WARNING:  CREATE TABLE NOT NULL NOT VALID CONSTRAINT WILL SET TO VALID
> the wording needs to change...

Yeah, we discussed this elsewhere.  I have an alpha-quality patch for
that, but I wasn't too sure about it ...

[1] https://postgr.es/m/CACJufxEQcHNhN6M18JY1mQcgQq9Gn9ofMeop47SdFDE5B8wbug@mail.gmail.com

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/

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