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From: Laurenz Albe <[email protected]>
To: Luca Dametto <[email protected]>
To: [email protected]
Subject: Re: Documentation enancement regarding NULL and operators
Date: Wed, 18 Dec 2024 15:32:34 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Sun, 2024-12-15 at 17:35 +0000, Luca Dametto wrote:
> Most programming languages return "true" when two null values are compared,
> and false when, being the two values nullable, one of them is null and the
> other one isn't. 
>
> [not SQL, however]
> 
> Whilst I'd love to discuss the reasons of this, I understand that it would
> be a waste of time for everyone, as we cannot change the status-quo even
> if it made sense, as it would break many thousands of projects. 
> 
> For that reason, I'd just like to improve the documentation to add at least
> a note about "hey, this won't work as you might expect, because it works
> in a different way than 99% of programming languages out there.".

There are already efforts to improve the documentation concerning NULL:
https://commitfest.postgresql.org/51/5086/
If that doesn't cover your case, perhaps you can join the discussion
and suggest improvements.

Yours,
Laurenz Albe






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