> > Well, yes, actually. Where in the documentation is a type conversion
> > expression defined? Do we use NEW and OLD? Or the name of the column?
> > Or something else?
> I think the ALTER TABLE page is in dire need of a "See also" section, at
> least. And a reference to where <expression> is defined would be nice
> to have.
What I'm pointing out here is that the USING clause can't be just ANY
expression, it needs to be a specific type of expression. And the docs
don't explain what kind of expression is usable here. Even a single example
would go a long way ...
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