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 ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])