Martijn van Oosterhout <kleptog@svana.org> writes:
> Well, I notice that the SQL standard defines something called WITH, so
> what you want is something like:
> WITH OLD AS ( SELECT blah )
> DO
> ( UPDATE <rule1>
> ; DELETE <rule2> )
I think it'd be a mistake to assume that WITH would fix Markus'
complaint. I haven't studied the spec in detail but I think that WITH
acts largely like a macro too. It certainly doesn't have the behavior
of "evaluate this just once", as one of the prime uses for it is in
recursive query definition.
regards, tom lane