On Nov 11, 2010, at 9:13 AM, Tom Lane wrote:
> If we establish a precedent that WITHs can be thought of as executing
> before the main command, we will eventually have to de-optimize existing
> WITH behavior. Or else make up reasons why the inconsistency is okay in
> some cases and not others, but that will definitely be a case of
> rationalizing after the fact.
I can see that, but if one can't see the result of the write, or can't determine whether or not it will be visible in
advance,what's the point of writeable CTEs?
Best,
David