Russell Smith <mr-russ@pws.com.au> writes:
> Really, I can't see how quoting an identifier should change the
> behaviour or resolved type.
REAL is not an identifier. It's a keyword. In fact, it's a reserved
word according to SQL99. So if we were going to do anything about this,
it would be to reject the OP's CREATE DOMAIN command as invalid syntax.
regards, tom lane