Neil Conway <[EMAIL PROTECTED]> writes:
> Attached is a revised version of this patch. I'll apply it tonight or 
> tomorrow, barring any objections.

I still find the grammar changes to be an ugly kluge --- it should be
possible to do this without introducing bogus nonterminals.

The ns push/pop operations don't appear to be correctly matched
(consider multiple WHEN clauses, a case the regression test does not
cover), nor do they surround the places where the variables are created.
It is likely that you don't need a push/pop at all; if it appears to
work now it's because the end of the block results in a pop and so
the variables disappear then anyway.

The patch is sloppy about whether free_var() is static or not.

I find the proposed change in plpgsql_ns_additem a distinct
disimprovement --- it's dubious even as a micro-optimization
and it certainly hurts legibility.

                        regards, tom lane

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