DROP TABLE removes tables from the database. Only the table owner, the schema owner, and superuser can drop a table. To empty a table of rows without destroying the table, use DELETE or TRUNCATE.
DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified. (CASCADE will remove a dependent view entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)
Do not throw an error if the table does not exist. A notice is issued in this case.
The name (optionally schema-qualified) of the table to drop.
Automatically drop objects that depend on the table (such as views), and in turn all objects that depend on those objects (see Section 5.13).
Refuse to drop the table if any objects depend on it. This is the default.
Read the upstream documentation. For corrections, first check the current version.