Re: RULE vs. SEQUENCE

Karel Zak wrote:
> 
> On Mon, 4 Sep 2000, Jan Wieck wrote:
> 
> > >  I have a question... why RULE call nexval() and data in RULE statement are
> > > differend than data in original stmt.
> >
...
> 
>  But executor can knows that somethig was already executed, we can mark
> some already executed expressions in rewriter and not execute it again in
> final executor... like:
...
> 
>  IMHO this is a good point for 7.2 ...

But if instead of nextval() you had random(), would you still want to execute
it 
only once ? And how should postgres know ?

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Hannu