Re: Rules: A Modest Proposal

On Sun, October 4, 2009 1:48 pm, Pavel Stehule wrote:
> 2009/10/4 David Fetter <david(at)fetter(dot)org>:
>> Folks,
>>
>> At the moment, user-accessible RULEs have, as far as I know, just two
>> sane uses:
>>
>> * Writing to VIEWs
>> * Routing writes to partitions
>
> somebody use it as instead triggers. And I am sure, so there are
> people, who use it for writable views.

We have such a rule (instead of a trigger) in our SaaS app. I'm lobbying
to remove it, and make it a real trigger, but that hasn't happened yet.

so there are folks out there.

>
> regards
> Pavel Stehule
>
>>
>> And the second is pretty thin, given the performance issues for
>> numbers of partitions over 2.
>>
>> What say we see about addressing those problems separately, and
>> removing user-accessible RULEs entirely?
>>
>> There are already patches to deal with the first, at least for the
>> kinds of VIEWs where this can be deduced automatically, and people are
>> starting to take on the second.
>>
>> The one remaining (as in nobody's really addressed it with code) issue
>> would be triggers on VIEWs.  As other systems have done it, it's
>> clearly not essentially impossible.  What would be needed?
>>
>> Cheers,
>> David.
>> --
>> David Fetter <david(at)fetter(dot)org> http://fetter.org/
>> Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
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>>
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