alter table mutable drop column f1;

alter table mutable add column f1 float8;

-- currently, this fails due to cached plan for "r.f1 + 1" expression

-- (but we can't actually show that, because a CLOBBER_CACHE_ALWAYS build

-- will succeed)

-- select sillyaddone(42);

select sillyaddone(42);

sillyaddone

-------------

altertable mutable add column f1 float8;

\c-

discard plans;

select sillyaddone(42);

altertable mutable drop column f1;