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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 AUTO_INCREMENT,
f2 INTEGER,
KEY (id)
) ENGINE=InnoDB;
CREATE TABLE child (
id INT PRIMARY KEY AUTO_INCREMENT,
parent_id INT
) ENGINE=InnoDB;
INSERT INTO parent VALUES (1, 0);
INSERT INTO child (parent_id) SELECT 1 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4;;
INSERT INTO parent (f2) SELECT 1 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4;;
INSERT INTO parent (f2) SELECT 2 FROM ten AS a1, ten AS a2, ten AS a3, ten AS a4;;
ALTER TABLE child ADD FOREIGN KEY (parent_id) REFERENCES parent(id);;
SELECT COUNT(*) = 20001 FROM parent;
COUNT(*) = 20001
1
SELECT COUNT(*) = 10000 FROM child;
COUNT(*) = 10000
1
SELECT COUNT(*) = 20001 FROM parent;
COUNT(*) = 20001
1
SELECT COUNT(*) = 10000 FROM child;
COUNT(*) = 10000
1
DROP TABLE child;
DROP TABLE parent;
DROP TABLE ten;
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