SHOW FUNCTION STATUS

语法说明

SHOW FUNCTION STATUS 是用来显示数据库中的所有函数的信息，包括函数名、数据库名、创建时间等等。

SHOW FUNCTION STATUS 命令只显示用户定义的函数，不包括系统函数。

语法结构

1. > SHOW FUNCTION STATUS
2. [LIKE 'pattern' | WHERE expr]

语法说明

LIKE 'pattern' 是可选参数，用于筛选要显示的函数。pattern 是一个模式字符串，可以使用 % 和 _ 通配符。例如，要显示所有以 my_function 开头的函数，可以使用以下命令：

1. SHOW FUNCTION STATUS LIKE 'my_function%';

输出结果将包括函数名、数据库名、类型、创建时间和修改时间等信息。

示例

1. create function twosum (x float, y float) returns float language sql as 'select $1 + $2' ;
2. create function mysumtable(x int) returns int language sql as 'select mysum(test_val, id) from tbl1 where id = $1';
3. create function helloworld () returns int language sql as 'select id from tbl1 limit 1';

5. mysql> show function status;
6. +------+------------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
7. | Db   | Name       | Type     | Definer | Modified            | Created             | Security_type | Comment | character_set_client | collation_connection | Database Collation |
8. +------+------------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
9. | aab  | twosum     | FUNCTION | root    | 2023-03-27 06:25:41 | 2023-03-27 06:25:41 | DEFINER       |         | utf8mb4              | utf8mb4_0900_ai_ci   | utf8mb4_0900_ai_ci |
10. | aab  | mysumtable | FUNCTION | root    | 2023-03-27 06:25:51 | 2023-03-27 06:25:51 | DEFINER       |         | utf8mb4              | utf8mb4_0900_ai_ci   | utf8mb4_0900_ai_ci |
11. | aab  | helloworld | FUNCTION | root    | 2023-03-27 06:25:58 | 2023-03-27 06:25:58 | DEFINER       |         | utf8mb4              | utf8mb4_0900_ai_ci   | utf8mb4_0900_ai_ci |
12. +------+------------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
13. 3 rows in set (0.00 sec)

15. mysql> show function status like 'two%';
16. +------+--------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
17. | Db   | Name   | Type     | Definer | Modified            | Created             | Security_type | Comment | character_set_client | collation_connection | Database Collation |
18. +------+--------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
19. | aab  | twosum | FUNCTION | root    | 2023-03-27 06:25:41 | 2023-03-27 06:25:41 | DEFINER       |         | utf8mb4              | utf8mb4_0900_ai_ci   | utf8mb4_0900_ai_ci |
20. +------+--------+----------+---------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
21. 1 row in set (0.01 sec)