"Ilja Golshtein" <ilejn@yandex.ru> writes:
> PG Doc 49.2 says: "Each TOAST-able data type specifies a default strategy for columns of that data type". How one can
findout these default strategies?
Look in pg_type, specifically the typstorage column.
Offhand I think NUMERIC is the only one that doesn't default to full
EXTENDED storage.
regards, tom lane