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From: Tom Lane <[email protected]>
To: James Coleman <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Should we document how column DEFAULT expressions work?
Date: Tue, 25 Jun 2024 16:59:29 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAaqYe-wQPbchCUE7pocPNEQ3PMY8a98Txmxc7q0+FvXtk1vvg@mail.gmail.com>
References: <CAAaqYe-wQPbchCUE7pocPNEQ3PMY8a98Txmxc7q0+FvXtk1vvg@mail.gmail.com>

James Coleman <[email protected]> writes:
> It's possible I'm the only one who's been in this situation, but I've
> multiple times found myself explaining to a user how column DEFAULT
> expressions work: namely how the quoting on an expression following
> the keyword DEFAULT controls whether or not the expression is
> evaluated at the time of the DDL statement or at the time of an
> insertion.

Uh ... what?  I recall something about that with respect to certain
features such as nextval(), but you're making it sound like there
is something generic going on with DEFAULT.

			regards, tom lane

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