"Brendan Jurd" <[EMAIL PROTECTED]> writes:
> As discussed on -hackers, this patch allows the construction of an
> empty array if an explicit cast to an array type is given (as in,
> ARRAY[]::int[]).

Applied with minor fixes; mostly, ensuring that the cast action would
propagate down to sub-arrays, as in

regression=# select array[[1],[2.2]]::int[];
(1 row)

I was interested to realize that this fix validates the decision to
pass down the type information on-the-fly during transformExpr recursion.
It would have been a lot more painful to do it if we'd taken the A_Const

I didn't do anything about removing A_Const's typename field, but I'm
thinking that would be a good cleanup patch.

                        regards, tom lane

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