connection node_2;

connection node_1;

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;