The DROP FUNCTION statement is used to drop stored functions and loadable functions:DROP FUNCTION语句用于删除存储函数和可加载函数：
For information about dropping stored functions, see Section 13.1.29, “DROP PROCEDURE and DROP FUNCTION Statements”.有关删除存储函数的信息，请参阅第13.1.29节，“DROP PROCEDURE语句和DROP FUNCTION语句”。
For information about dropping loadable functions, see Section 13.7.4.2, “DROP FUNCTION Statement for Loadable Functions”.有关删除可加载函数的信息，请参阅第13.7.4.2节，“针对可加载函数的DROP FUNCTION语句”。