Bruce Momjian <bruce@momjian.us> writes:
> + This means that UPDATE, DELETE, and SELECT can trigger space
> + reclamation, while INSERT ... VALUES cannot because it does not retrieve
> + a row.
I don't believe that's correct. It might have happened to work that way
for you in a particular test. It's certainly not something I'd document
as being intended long-term behavior.
regards, tom lane