Mnesia restore :default_op behavior for unlisted tables across OTP versions
Context When restoring a Mnesia backup with :mnesia.restore/2 , the :default_op option controls how tables not explicitly named in the restore specification are handled. Documented values include :clear_tables , :keep_tables , and :skip_tables , but the exact semantics—especially whether :skip_tables preserves existing data or leaves the table absent—vary in