Re: BUG #17970: FEATURE REQUEST-allow re-adding GENERATED ALWAYS AS constraint to existing columns after removing it

The following bug has been logged on the website:

Bug reference:      17970
Logged by:          PGP
Email address:      pgp@gmx.it
PostgreSQL version: 15.3
Operating system:   Linux
Description:       

But the reverse (i.e. re-adding the "GENERATED ALWAYS AS .. STORED" part to
an existing column) is not possible.
I think this is a contradiction, because, by modifying the underlying
function, I am able to insert incoherent values in the generated column, so,
since this is allowed, it should be possible as well to add again this kind
of constraint, after temporarily dropping it (for example, for doing a bulk
insert via COPY command, in the cases when generating the transformed_id
values outside the db is more performant than generating them automatically
within the insert statement).