> > I'd be in favour of creating whole sets of backwards-compatibility GUC's
> > whenever we break backwards compatibility.
> >
> > eg.
> > use_72_compat = yes
> > use_73_compat = yes
>
> That sounds like a recipe for a maintenance nightmare to me.
We only have to keep them for one major version, say. eg. 7.3 release would
remove the 71_compat option...
Chris