Re: when are check() constraints evaluated

From: Mike Sherrill <>
Date: Tue, 23 Dec 2003 10:01:31 -0500
Message-ID: <>

On 22 Dec 2003 11:24:34 -0800, (Karel van der Walt) wrote:

>I am specifically interested in table invariants

The relational model and the SQL standard support deferred constraint checking, in which the constraints are evaluated at the end of a transaction. But not all vendors have implemented support for deferred constraints yet.

Mike Sherrill
Information Management Systems
Received on Tue Dec 23 2003 - 16:01:31 CET

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