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Re: PROPOSAL of xmlvalidate

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Tomáš Pospíšil <killteck(at)seznam(dot)cz>, pgsql-hackers(at)postgresql(dot)org, chmelab(at)gmail(dot)com
Subject: Re: PROPOSAL of xmlvalidate
Date: 2010-11-29 18:30:51
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 11/29/2010 12:36 PM, Robert Haas wrote:
>> But that could equally well be stored in a user table rather than a
>> system table.

> Yeah. The trouble is you won't be able to use that reliably in a check 
> constraint, which I imagine is one of the principal intended purposes. 

Moving the same data to a system table doesn't fix that, unless you
require that the system table be immutable ... which'd seem to make
the idea useless.

			regards, tom lane

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