Neil Conway <[EMAIL PROTECTED]> writes:
> Tom Lane wrote:
>> I still find the grammar changes to be an ugly kluge --- it should be
>> possible to do this without introducing bogus nonterminals.

> The scope-local variables need to be added to the namespace by the time 
> that we parse the WHEN clauses. I can see two ways to do that: adding a 
> bogus non-terminal, or using a mid-rule action. Mid-rule actions are 
> pretty ugly, though. Is there a better alternative?

Right, mid-rule actions were what I had in mind.  They're not uglier
than introducing empty nonterminals --- and in fact plpgsql's grammar
already relies on 'em.  The cursor variable declaration production
(about line 359 in CVS tip) seems to me to offer a very direct parallel
to what we want to do here.

                        regards, tom lane

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