-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Greg
Sabino Mullane
Sent: woensdag 28 maart 2007 2:50
To: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] Guarenteeing complex referencial
integrity through custom triggers
[snip]
Much too elaborate
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Included is a more eloborate example, which has some webby thing at
http://www.familiedobbelsteen.nl/printer-test/ (should work).
Much too elaborate - I'm sorry, but I don't think anyone here is willing
to wade through nearly 900 lines of
Ühel kenal päeval, E, 2007-03-26 kell 16:05, kirjutas Joris Dobbelsteen:
Oracle has choosen to allow constraint enforcement by locking on the
parent tuple. In contrast postgres has chosen (historically, see RI
triggers) to fail on detecting conflicting newly inserted rows (the
cross-check).
At this time Postgresql is unable to guarentee that complex* referencial
integrity (RI) constraints can be enforced using standard (read non-C)
triggers or SQL. This is an unfortunate side-effect of the MVCC model,
as it allows multiple transactions to modify a snapshot of the data at a
certain
Joris Dobbelsteen [EMAIL PROTECTED] writes:
My intention is to expose the functionality to the outside world for
general use. This provides means to ensure custom complex constraints
can be enforced properly. I hope to push it into 8.3 if possible.
You are at least a month too late for 8.3,
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As a real-world example where the constraint cannot be enforced in
postgresql.
For every tuple t in cartridge_change, there must exists a tuple t' in
printers with t.id = t'.id, and a tuple t'' in cartridge_types with
t.color = t''.color
-Original Message-
From: Tom Lane [mailto:[EMAIL PROTECTED]
Sent: maandag 26 maart 2007 19:52
To: Joris Dobbelsteen
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] Guarenteeing complex referencial
integrity through custom triggers
Joris Dobbelsteen [EMAIL PROTECTED] writes:
My
[66.207.139.130]
said: 5505.0.0 Go away, spammer (in reply to MAIL FROM command)
[//]
-Original Message-
From: Tom Lane [mailto:[EMAIL PROTECTED]
Sent: maandag 26 maart 2007 19:52
To: Joris Dobbelsteen
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] Guarenteeing complex referencial
