"Pavel Stehule" <pavel.stehule@gmail.com> writes:
> I understand now why Oracle use => symbol for named params. This isn't
> used so operator - so implementation is trivial.
You really didn't understand the objection at all, did you?
The point is not about whether there is any built-in operator named =>.
The point is that people might have created user-defined operators named
that.
regards, tom lane