Re: complex referential integrity constraints - Mailing list pgsql-general

From Martijn van Oosterhout
Subject Re: complex referential integrity constraints
Date
Msg-id 20070222221508.GE31115@svana.org
Whole thread Raw
In response to Re: complex referential integrity constraints  ("Joris Dobbelsteen" <Joris@familiedobbelsteen.nl>)
List pgsql-general
On Thu, Feb 22, 2007 at 06:51:49PM +0100, Joris Dobbelsteen wrote:
> >Err, foreign keys are implemented using triggers, so this
> >statement is self-contradictary.
>
> Are you really sure they are executed under the same visibility rules?

Reasonably. I have no idea what visibility rules would make any
difference at all. AIUI a foreign key just takes a shared lock on the
referenced row and all the magic of MVCC makes sure the row exists when
the transaction completes.

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.

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