Excerpts from Tom Lane's message of lun feb 27 20:54:41 -0300 2012:
> Andres Freund <andres@anarazel.de> writes:
> > On Tuesday, February 28, 2012 12:30:36 AM Tom Lane wrote:
> >> Ugh ... if that's currently allowed, we definitely need to fix it.
>
> > Btw, whats the danger youre seing?
>
> Well, I'm not sure that it would actively break anything, but we
> definitely meant to disallow the case. Also, I seem to recall some
> places that intuit a relation's shared marker in the opposite direction
> (if it's in pg_global it must be shared), and that could definitely
> cause issues if we treat a rel as shared when it isn't.
The list of shared rels is hardcoded -- see IsSharedRelation.
--
Álvaro Herrera <alvherre@commandprompt.com>
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