DROP TABLE IF EXISTS t1;
connect  con1,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
connect  con2,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
connection con1;
CREATE TABLE t1 (a INT, pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=xengine;
START TRANSACTION;
SELECT a FROM t1;
a
connection con2;
BEGIN;
INSERT INTO t1 (a) VALUES(1);
connection con1;
SELECT a FROM t1;
a
connection con2;
INSERT INTO t1 (a) VALUES (2);
connection con1;
SELECT a FROM t1;
a
INSERT INTO t1 (a) SELECT a+100 FROM t1;
SELECT a FROM t1;
a
connection con2;
SELECT a FROM t1;
a
1
2
COMMIT;
SELECT a FROM t1;
a
1
2
connection con1;
SELECT a FROM t1;
a
1
2
INSERT INTO t1 (a) SELECT a+200 FROM t1;
SELECT a FROM t1;
a
1
2
201
202
COMMIT;
SELECT a FROM t1;
a
1
2
201
202
connection con2;
SELECT a FROM t1;
a
1
2
201
202
connection default;
CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=xengine;
INSERT INTO t2 (a) VALUES (1);
COMMIT;
connection con1;
BEGIN;
SELECT a from t2;
a
1
INSERT INTO t2 (a) VALUES (1), (3);
ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
connection con2;
INSERT INTO t2 (a) VALUES (2);
COMMIT;
connection con1;
SELECT a from t2;
a
1
2
COMMIT;
connection default;
disconnect con1;
disconnect con2;
DROP TABLE t1;
DROP TABLE t2;
CREATE TABLE t3 (
pk int unsigned PRIMARY KEY,
count int unsigned DEFAULT '0'
) ENGINE=XENGINE;
connect  con1,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
connect  con2,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
connection con1;
BEGIN;
SELECT * FROM t3;
pk	count
connection con2;
BEGIN;
INSERT INTO t3 (pk) VALUES(1) ON DUPLICATE KEY UPDATE count=count+1;
COMMIT;
connection con1;
INSERT INTO t3 (pk) VALUES(1) ON DUPLICATE KEY UPDATE count=count+1;
COMMIT;
SELECT count FROM t3;
count
1
connection default;
disconnect con1;
disconnect con2;
DROP TABLE t3;