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# Save the initial number of concurrent sessions
connect con1,localhost,root,,;
connect con2,localhost,root,,;
connect con3,localhost,root,,;
connection con1;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT) ENGINE=innodb;
BEGIN;
INSERT INTO t1 VALUES(1);
connection con2;
FLUSH TABLES WITH READ LOCK;
connection con1;
# Sending:
COMMIT;
connection con2;
# Wait until COMMIT gets blocked.
# Verify that 'con1' was blocked and data did not move.
SELECT * FROM t1;
a
UNLOCK TABLES;
connection con1;
# Reaping COMMIT
connection con1;
BEGIN;
SELECT * FROM t1 FOR UPDATE;
a
1
connection con2;
BEGIN;
SELECT * FROM t1 FOR UPDATE;
connection con3;
FLUSH TABLES WITH READ LOCK;
connection con1;
COMMIT;
connection con2;
a
1
COMMIT;
connection con3;
UNLOCK TABLES;
connection con2;
COMMIT;
connection con1;
BEGIN;
INSERT INTO t1 VALUES(10);
FLUSH TABLES WITH READ LOCK;
connection con2;
FLUSH TABLES WITH READ LOCK;
UNLOCK TABLES;
BEGIN;
SELECT * FROM t1;
a
1
10
SHOW CREATE DATABASE test;
Database Create Database
test CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_uca1400_ai_ci */
COMMIT;
# Cleanup
connection default;
disconnect con1;
disconnect con2;
disconnect con3;
# We commit open transactions when we disconnect: only then we can
# drop the table.
DROP TABLE t1;
# End of 4.1 tests
# Wait till all disconnects are completed
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