CREATE TABLE t1 (f1 INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
connection node_2;
SELECT COUNT(*) = 1 FROM t1;
COUNT(*) = 1
1
connection node_1;
UPDATE t1 SET f1 = 2 WHERE f1 = 1;
connection node_2;
SELECT COUNT(*) = 1 FROM t1 WHERE f1 = 2;
COUNT(*) = 1
1
DROP TABLE t1;