The logic is similar to default_tablespace in some ways, so as no SET
queries on default_table_access_method are generated before dumping or
restoring an object (table or materialized view support table AMs) when
specifying this new option.
This option is useful to enforce the use of a default access method even
if some tables included in a dump use an AM different than the system's
default.
There are already two cases in the TAP tests of pg_dump with a table and
a materialized view that use a non-default table AM, and these are
extended that the new option does not generate SET clauses on
default_table_access_method.
Author: Justin Pryzby
Discussion: https://postgr.es/m/20211207153930.GR17618@telsasoft.com
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