--- /dev/null
+/^$/d
+/^--/d
+/^CREATE EXTENSION IF NOT EXISTS plpgsql /d
+/^COMMENT ON EXTENSION plpgsql /d
+/^SET default_with_oids /d
+/^SET default_table_access_method /d
+/^SET idle_in_transaction_session_timeout /d
+/^ AS integer$/d
+
+s/ IMMUTABLE / /