Re: Proposal: Solving the "Return proper effected tuple count

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Joe Conway <mail(at)joeconway(dot)com>
Cc: Steve Howe <howe(at)carcass(dot)dhs(dot)org>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Proposal: Solving the "Return proper effected tuple count
Date: 2002-09-09 03:36:38
Message-ID: 200209090336.g893acN24720@candle.pha.pa.us
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Joe Conway wrote:
> Sure, but that's why I am in favor of changing the tag. If you did:
>
> DELETE FROM fooview WHERE name LIKE 'Joe%';
>
> and got:
>
> MUTATED 507324 3
>
> it would mean that 3 tuples in total were affected by all of the
> substitute operations, only of of them being an INSERT, and the Oid of
> the lone INSERT was 507324. If instead I got:
>
> DELETE 0
>
> I'd be back to having no useful information. Did any rows in fooview
> match the criteria "LIKE 'Joe%'"? Did any data in my database get
> altered? Can't tell from this.

OK. Do any people have INSTEAD rules where there are not commands
matching the original query tag? Can anyone think of such a case being
created?

The only one I can think of is UPDATE implemented as separate INSERT and
DELETE commands.

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