1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
price DECIMAL, PRIMARY KEY(category, id)) ENGINE=INNODB;
CREATE TABLE customer (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,
product_category INT NOT NULL,
product_id INT NOT NULL,
customer_id INT NOT NULL,
PRIMARY KEY(no),
INDEX (product_category, product_id),
FOREIGN KEY (product_category, product_id)
REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT,
INDEX (customer_id),
FOREIGN KEY (customer_id)
REFERENCES customer(id)
) ENGINE=INNODB;
SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
WHERE table_name = 'product_order';
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME product_order_ibfk_1
UNIQUE_CONSTRAINT_CATALOG def
UNIQUE_CONSTRAINT_SCHEMA test
UNIQUE_CONSTRAINT_NAME PRIMARY
MATCH_OPTION NONE
UPDATE_RULE CASCADE
DELETE_RULE RESTRICT
TABLE_NAME product_order
REFERENCED_TABLE_NAME product
CONSTRAINT_CATALOG def
CONSTRAINT_SCHEMA test
CONSTRAINT_NAME product_order_ibfk_2
UNIQUE_CONSTRAINT_CATALOG def
UNIQUE_CONSTRAINT_SCHEMA test
UNIQUE_CONSTRAINT_NAME PRIMARY
MATCH_OPTION NONE
UPDATE_RULE RESTRICT
DELETE_RULE RESTRICT
TABLE_NAME product_order
REFERENCED_TABLE_NAME customer
DROP TABLE product_order;
DROP TABLE product;
DROP TABLE customer;
|
