Re: referential integrity constraints not checked inside

From: Christian Rank <christian(dot)rank(at)rz(dot)uni-passau(dot)de>
To: Patrick Welche <prlw1(at)newn(dot)cam(dot)ac(dot)uk>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: referential integrity constraints not checked inside
Date: 2004-05-13 11:22:24
Message-ID: 40A35A70.3000803@rz.uni-passau.de
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Patrick Welche wrote:

> On Thu, May 13, 2004 at 11:41:24AM +0200, Christian Rank wrote:
>
>> create function f () returns void as '
>> begin
>> delete from a;
>> delete from b;
>> return;
>> end;
>> ' language plpgsql;
>>
>>I would expect that
>>
>> select f();
>>
>>yields an error message about constraint violation when executing
>>'delete from a;'.
>
>
> Off the top of my head, the constraints would be checked when the
> transaction ends, i.e., after both the "delete from a" and "delete from b"
> happened. Split into 2 transactions?

Thanks for this suggestion, but I think this does not solve the issue,
since according to the docs, the validity of a constraint should be
checked after each statement unless this behaviour is altered with a SET
CONSTRAINTS statement.

Anyway, the select f(); is in my case not executed in transactional
context (not embraced by START TRANSACTION; ... COMMIT;).

Regards,
Christian

--
Dr. Christian Rank
Rechenzentrum Universität Passau
Innstr. 33
D-94032 Passau
GERMANY
Tel.: 0851/509-1838
Fax: 0851/509-1802
PGP public key see http://www.rz.uni-passau.de/mitarbeiter/rank

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