Re: add_missing_from breaks existing views

From: Andrew - Supernews <andrew+nonews(at)supernews(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: add_missing_from breaks existing views
Date: 2005-10-26 19:33:48
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On 2005-10-26, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Andrew - Supernews <andrew+nonews(at)supernews(dot)com> writes:
>> On 2005-10-26, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> Pretending it's the user's mistake isn't
>>> an answer that fits down my craw very well...
>> I'm not claiming it's the user's mistake. My point is that if the user
>> did in fact remove add_missing_from after creating views that depend on it,
>> then they have already run into a bug.
> No, you're looking at this in the wrong direction.

It's quite possible that in trimming my messages for posting I'm removing
too much of the context; is that the case? To recap:

- you pointed out that there was an incompatibility.

- I pointed out a way in which that incompatibility can be substantially
reduced in scope, from affecting "everyone who has views defined using
add_missing_from" to only affecting "everyone who has views defined using
add_missing_from but who has subsequently turned that off, in spite of the
bugs that they would encounter in doing so".

- you respond by saying there is an incompatibility.

Now, I don't know how I can possibly be clearer about this. I know that
changing the default add_missing_from causes an incompatibility. If you
prefer to keep it, rather than use a solution which will work for everyone
who (a) isn't already vulnerable to dump+restore problems and (b) will use
8.1's pg_dump to upgrade, then personally I couldn't care less. I'm just
surprised by the attitude.

Andrew, Supernews - individual and corporate NNTP services

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