connection node_2; connection node_1; CREATE DATABASE d1; CREATE TABLE d1.t1(f1 INTEGER) ENGINE=InnoDB; CREATE DATABASE d2; CREATE TABLE d2.t1(f1 INTEGER PRIMARY KEY) ENGINE=InnoDB; connection node_1; SET AUTOCOMMIT=OFF; START TRANSACTION; INSERT INTO d1.t1 VALUES (1); connection node_2; SET AUTOCOMMIT=OFF; START TRANSACTION; INSERT INTO d2.t1 VALUES (1); connection node_1; COMMIT; connection node_2; COMMIT; SELECT COUNT(*) = 1 FROM d1.t1; COUNT(*) = 1 1 SELECT COUNT(*) = 1 FROM d2.t1; COUNT(*) = 1 1 connection node_1; SELECT COUNT(*) = 1 FROM d1.t1; COUNT(*) = 1 1 SELECT COUNT(*) = 1 FROM d2.t1; COUNT(*) = 1 1 DROP TABLE d1.t1; DROP TABLE d2.t1; DROP DATABASE d1; DROP DATABASE d2;