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To: Stephan Szabo <sszabo@megazone.bigpanda.com>
Cc: Enio Schutt Junior <enio@pmpf.rs.gov.br>,
	pgsql-sql@postgresql.org
Subject: Re: Sometimes referential integrity seems not to work 
In-reply-to: <20040131124500.H98710@megazone.bigpanda.com> 
References: <20040126175147.B3BD046E09@mail.passofundo.rs.gov.br>
	<20040131124500.H98710@megazone.bigpanda.com>
Comments: In-reply-to Stephan Szabo <sszabo@megazone.bigpanda.com>
	message dated "Sat, 31 Jan 2004 12:45:43 -0800"
Date: Sat, 31 Jan 2004 18:40:48 -0500
Message-ID: <9148.1075592448@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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Stephan Szabo <sszabo@megazone.bigpanda.com> writes:
> On Mon, 26 Jan 2004, Enio Schutt Junior wrote:
>> In a database I am working, I sometimes have to delete all the records in
>> some tables. According to the referential integrity defined in the creation
>> of the tables, postmaster should not delete the records, but it does. I have
>> used the following commands: "delete from table_1" and "truncate table_1".
>> ...
>> can the postgres user delete records despite referential integrity?

> It shouldn't.  Can you give your version information and a complete
> standalone example?

I think the first PG release or two that had TRUNCATE TABLE would allow
you to apply it despite the existence of foreign-key constraints on the
table.  Recent releases won't though.

			regards, tom lane