```sql # 只能修改存储过程的特征 # 如果要修改参数列表或begin...end，只能删除重新定义 ALTER PROCEDURE process_name [COMMENT 'string'] [LANGUAGE SQL] [DETERMINISTIC | NOT DETERMINISTIC] [CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA] [SQL SECURITY {DEFINER | INVOKER}] ```