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CREATE TABLE ten (f1 INTEGER) ENGINE=InnoDB;
INSERT INTO ten VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
CREATE TABLE parent (
id INT PRIMARY KEY,
KEY (id)
) ENGINE=InnoDB;
CREATE TABLE child (
id INT PRIMARY KEY AUTO_INCREMENT,
parent_id INT
) ENGINE=InnoDB;
INSERT INTO parent VALUES (1);
INSERT INTO child (parent_id) SELECT 1 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4;
connection node_1;
ALTER TABLE child ADD FOREIGN KEY (parent_id) REFERENCES parent(id) ON UPDATE CASCADE;;
connection node_2;
UPDATE parent SET id = 2 WHERE id = 1;;
connection node_1;
connection node_2;
connection node_2;
SELECT COUNT(*) = 10000 FROM child WHERE parent_id = 2;
COUNT(*) = 10000
1
connection node_1;
SELECT COUNT(*) = 10000 FROM child WHERE parent_id = 2;
COUNT(*) = 10000
1
DROP TABLE child;
DROP TABLE parent;
DROP TABLE ten;
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