| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Bernd Helmle <mailings(at)oopsware(dot)de> |
| Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [COMMITTERS] pgsql: Automatic view update rules Bernd Helmle |
| Date: | 2009-01-25 01:47:20 |
| Message-ID: | 3219.1232848040@sss.pgh.pa.us |
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Bernd Helmle <mailings(at)oopsware(dot)de> writes:
> What i'm missing is some notion about CHECK OPTION. We
> surely want to support that in way.
Feel free to insist on that, if you want to make dead certain that
updatable views don't make it into 8.4 ;-)
My recollection of the discussion two years ago is that we concluded
that WITH CHECK OPTION is simply not implementable using a rule-based
infrastructure, because of the multiple-evaluation problem. Perhaps
it could be done with some kind of extension to the constraint-checking
logic, but I freely admit I don't see how to do it in any detail.
That seems like something to tackle later on.
regards, tom lane
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