From: Stefan Weiss <spaceman@foo.at>
To: Gaetano Mendola <mendola@bigfoot.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: A transaction in transaction? Possible?
Date: Thu, 11 Nov 2004 20:31:27 +0100
Message-ID: <200411112031.27766.spaceman@foo.at> (raw)
In-Reply-To: <4193217C.9080900@bigfoot.com>
References: <Pine.LNX.4.44.0411101256590.6883-100000@matrix.gatewaynet.com>
<200411102236.41971.spaceman@foo.at>
<4193217C.9080900@bigfoot.com>
On Thursday, 11 November 2004 09:23, Gaetano Mendola wrote:
> Stefan Weiss wrote:
> > These tables are connected by foreign keys, but without "on delete"
> > triggers.
>
> Why "without" ? Are you looking to solve a problem introduced by
> yourself ?
There are numerous checks involved before a customer (or a contact)
can be deleted, and not all of these checks can be done by querying
the database. Sometimes triggers aren't enough.
> You can handle this task using the new functionality introduced with
> savepoint: the exception. For more information look at:
> http://candle.pha.pa.us/main/writings/pgsql/sgml/plpgsql-control-structures
>.html#PLPGSQL-ERROR-TRAPPING
The "delete contact" and "delete customer" functions are not stored
procedures, so I'm not sure how this can help.
thanks,
stefan
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To: pgsql-sql@postgresql.org
Cc: spaceman@foo.at, mendola@bigfoot.com
Subject: Re: A transaction in transaction? Possible?
In-Reply-To: <200411112031.27766.spaceman@foo.at>
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