Jaime Casanova <jcasanov@systemguards.com.ec> writes:
> Hi, any reason not to implement an ALTER CAST statement?
Mainly, because we don't really *want* every thinks-he-knows-something
DBA fooling around with the built-in casts. If he actually knows enough
to know whether it's safe, then he knows enough to do it by poking the
catalogs.
regards, tom lane