เราสามารถ mysql.proc เพื่อดูรายการพร้อมกับข้อมูลที่สมบูรณ์ของฟังก์ชันที่เก็บไว้ในฐานข้อมูล MySQL เฉพาะโดยแบบสอบถามต่อไปนี้ -
mysql> Select * from mysql.proc where db = 'query' AND type = 'FUNCTION' \G
*************************** 1. row ***************************
db: query
name: factorial
type: FUNCTION
specific_name: factorial
language: SQL
sql_data_access: CONTAINS_SQL
is_deterministic: YES
security_type: DEFINER
param_list: n DECIMAL(3,0)
returns: decimal(20,0)
body: BEGIN
DECLARE factorial DECIMAL(20,0) DEFAULT 1;
DECLARE counter DECIMAL(3,0);
SET counter = n;
factorial_loop: REPEAT
SET factorial = factorial * counter;
SET counter = counter - 1;
UNTIL counter = 1
END REPEAT;
RETURN factorial;
END
definer: root@localhost
created: 2021-11-16 14:04:48
modified: 2021-11-16 14:04:48
sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
comment:
character_set_client: cp850
collation_connection: cp850_general_ci
db_collation: latin1_swedish_ci
body_utf8: BEGIN
DECLARE factorial DECIMAL(20,0) DEFAULT 1;
DECLARE counter DECIMAL(3,0);
SET counter = n;
factorial_loop: REPEAT
SET factorial = factorial * counter;
SET counter = counter - 1;
UNTIL counter = 1
END REPEAT;
RETURN factorial;
END
*************************** 2. row ***************************
db: query
name: Hello
type: FUNCTION
specific_name: Hello
language: SQL
sql_data_access: CONTAINS_SQL
is_deterministic: YES
security_type: DEFINER
param_list: s CHAR(20)
returns: char(50) CHARSET latin1
body: RETURN CONCAT('Hello, ',s,'!')
definer: root@localhost
created: 2017-11-12 11:42:31
modified: 2017-11-12 11:42:31
sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
comment:
character_set_client: cp850
collation_connection: cp850_general_ci
db_collation: latin1_swedish_ci
body_utf8: RETURN CONCAT('Hello, ',s,'!')
2 rows in set (0.06 sec) 