public inbox for [email protected]  

help / color / mirror / Atom feed

From: Adrian Klaver <[email protected]>
To: Stuart Campbell <[email protected]>
To: [email protected]
Subject: Re: Check whether a NOT NULL check constraint has been validated
Date: Sun, 30 Nov 2025 19:07:47 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAZ6SnyOmabkioC3n8GCk5dWQsx57pCSiZy_x1JEOrY7aejxaA@mail.gmail.com>
References: <CAAZ6SnyOmabkioC3n8GCk5dWQsx57pCSiZy_x1JEOrY7aejxaA@mail.gmail.com>

On 11/30/25 16:59, Stuart Campbell wrote:
> Hello,
> 
> I have several NOT NULL check constraints in my schema that were 
> originally added as NOT VALID. I would like to determine whether they 
> have all since been validated, or not.
> 
> I thought maybe pg_constraint.convalidated might help, but it seems like 
> the version of Postgres I'm using (16) doesn't store not null 
> constraints in that table. And even in later versions, maybe it doesn't 
> hold the information I need.
> 
> Is there another way to discover this?

1) Select count(*) from <table> where <col> IS NULL;

2) From here

https://www.postgresql.org/docs/current/sql-altertable.html#SQL-ALTERTABLE-NOTES

ALTER TABLE <table> VALIDATE CONSTRAINT <constraint_name>;

As described:

". Once the constraint is in place, no new violations can be inserted, 
and the existing problems can be corrected at leisure until VALIDATE 
CONSTRAINT finally succeeds."

> 
> This communication and any attachments may contain confidential 
> information and are intended to be viewed only by the intended 
> recipients. If you have received this message in error, please notify 
> the sender immediately by replying to the original message and then 
> delete all copies of the email from your systems.
> 
> 


-- 
Adrian Klaver
[email protected]

view thread (2+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected]
  Subject: Re: Check whether a NOT NULL check constraint has been validated
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox