blob: 42f8085ee1a6f2948b997fcb1520d22582715149 (
plain)
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
|
connection node_2;
connection node_1;
CREATE TABLE parent (
id INT PRIMARY KEY,
KEY (id)
) ENGINE=InnoDB;
CREATE TABLE child (
id INT PRIMARY KEY,
parent_id INT,
FOREIGN KEY (parent_id)
REFERENCES parent(id)
) ENGINE=InnoDB;
INSERT INTO parent VALUES (1);
INSERT INTO child VALUES (1,1);
SET SESSION foreign_key_checks = 0;
INSERT INTO child VALUES (2,2);
connection node_2;
SELECT COUNT(*) = 1 FROM child WHERE id = 2;
COUNT(*) = 1
1
INSERT INTO child VALUES (3,3);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
SET SESSION foreign_key_checks = 0;
DELETE FROM parent;
connection node_1;
SELECT COUNT(*) = 0 FROM parent;
COUNT(*) = 0
1
DROP TABLE child;
DROP TABLE parent;
|
