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CREATE TABLE t0 (
f1 INT PRIMARY KEY,
f2 INT UNIQUE
) ENGINE=INNODB;
CREATE TABLE t1 (
f1 INT PRIMARY KEY,
FOREIGN KEY (f1)
REFERENCES t0(f1)
ON UPDATE CASCADE
) ENGINE=INNODB;
CREATE TABLE t2 (
f2 INT PRIMARY KEY,
FOREIGN KEY (f2)
REFERENCES t0(f2)
ON UPDATE CASCADE
) ENGINE=INNODB;
INSERT INTO t0 VALUES (0, 0);
INSERT INTO t1 VALUES (0);
INSERT INTO t2 VALUES (0);
UPDATE t0 SET f1 = 1, f2 = 2;
SELECT f1 = 1 FROM t1 WHERE f1 = 1;
f1 = 1
1
SELECT f2 = 2 FROM t2 WHERE f2 = 2;
f2 = 2
1
SELECT f1 = 1 FROM t1;
f1 = 1
1
SELECT f2 = 2 FROM t2;
f2 = 2
1
DROP TABLE t2;
DROP TABLE t1;
DROP TABLE t0;
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