Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> As previously mentioned, AS is already used by the SQL standard for a
> different purpose in this context.
Hm? [ reads spec ... ] Oh, you mean <generalized expression>.
Does that actually do anything useful? It looks like it's just
a random shortcut for a CAST expression in a parameter list.
regards, tom lane