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From: Bruno Wolff III <[email protected]>
To: Erik Thiele <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: [SQL] special integrity constraints
Date: Mon, 22 Mar 2004 18:34:56 -0600
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On Mon, Mar 22, 2004 at 17:21:21 +0100,
  Erik Thiele <[email protected]> wrote:
> 
> there is no such thing as a deferred check constraint:
> 
> DEFERRABLE
> NOT DEFERRABLE
> 
> This controls whether the constraint can be deferred. A constraint that
> is not deferrable will be checked immediately after every command.
> Checking of constraints that are deferrable may be postponed until the
> end of the transaction (using the SET CONSTRAINTS command). NOT
> DEFERRABLE is the default. 
> 
> !!! Only foreign key constraints currently accept
> this clause. All other constraint types are not deferrable. !!!

Sorry, I checked the syntax for CREATE TABLE in the documentation and
it shows DEFERRABLE as allowed on any column constraint. However, that
is apparently not correct.

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