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Bug#46527 COMMIT AND CHAIN RELEASE does not make sense
Bug#53343 completion_type=1, COMMIT/ROLLBACK AND CHAIN don't
preserve the isolation level
Bug#53346 completion_type has strange effect in a stored
procedure/prepared statement
Added test cases to verify the expected behaviour of :
SET SESSION TRANSACTION ISOLATION LEVEL,
SET TRANSACTION ISOLATION LEVEL,
@@completion_type,
COMMIT AND CHAIN,
ROLLBACK AND CHAIN
..and some combinations of the above
272 lines
4.7 KiB
Text
272 lines
4.7 KiB
Text
#
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# Bug#20837 Apparent change of isolation level
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# during transaction
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#
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# Bug#53343 completion_type=1, COMMIT/ROLLBACK
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# AND CHAIN don't preserve the isolation
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# level
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connection default;
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SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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CREATE TABLE t1 (s1 INT) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1),(2);
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COMMIT;
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START TRANSACTION;
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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ERROR 25001: Transaction isolation level can't be changed while a transaction is in progress
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COMMIT;
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SET @@autocommit=0;
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COMMIT;
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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REPEATABLE-READ
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Should be REPEATABLE READ
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SELECT * FROM t1;
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s1
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1
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2
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SELECT @@tx_isolation;
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@@tx_isolation
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REPEATABLE-READ
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Should be REPEATABLE READ
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INSERT INTO t1 VALUES (-1);
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SELECT @@tx_isolation;
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@@tx_isolation
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REPEATABLE-READ
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Should be REPEATABLE READ
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COMMIT;
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START TRANSACTION;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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connection con1
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START TRANSACTION;
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INSERT INTO t1 VALUES (1000);
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COMMIT;
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connection default
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We should not be able to read the '1000'
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SELECT * FROM t1;
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s1
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1
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2
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-1
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COMMIT;
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Now, the '1000' should appear.
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START TRANSACTION;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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1000
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COMMIT;
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SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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connection default
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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START TRANSACTION;
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connection con1
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START TRANSACTION;
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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connection default
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SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
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COUNT(*)
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1
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Should be 1
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COMMIT AND CHAIN;
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connection con1
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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connection default
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SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
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COUNT(*)
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1
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Should be 1
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COMMIT;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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1000
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1001
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1002
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT;
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connection default
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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START TRANSACTION;
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connection con1
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START TRANSACTION;
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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connection default
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SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
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COUNT(*)
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1
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Should be 1
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ROLLBACK AND CHAIN;
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connection con1
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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connection default
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SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
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COUNT(*)
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1
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Should be 1
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COMMIT;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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1001
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1002
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT;
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SET @@completion_type=1;
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connection default
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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START TRANSACTION;
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connection con1
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START TRANSACTION;
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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Should see 1001
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COMMIT AND NO CHAIN;
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default transaction is now in REPEATABLE READ
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connection con1
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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1002
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Should see 1001 and 1002
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connection con1
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INSERT INTO t1 VALUES (1003);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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1002
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Should see 1001 and 1002, but NOT 1003
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COMMIT;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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1001
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1002
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1003
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT AND NO CHAIN;
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SET @@completion_type=0;
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COMMIT;
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connection default
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SET @@completion_type=1;
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COMMIT AND NO CHAIN;
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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START TRANSACTION;
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connection con1
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START TRANSACTION;
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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Should see 1001
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ROLLBACK AND NO CHAIN;
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default transaction is now in REPEATABLE READ
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connection con1
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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1002
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Should see 1001 and 1002
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connection con1
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INSERT INTO t1 VALUES (1003);
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COMMIT;
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connection default
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SELECT * FROM t1 WHERE s1 >= 1000;
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s1
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1001
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1002
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Should see 1001 and 1002, but NOT 1003
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COMMIT;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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1001
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1002
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1003
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT AND NO CHAIN;
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SET @@completion_type=0;
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COMMIT;
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connection default
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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START TRANSACTION;
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SELECT * FROM t1;
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s1
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1
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2
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-1
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connection con1
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INSERT INTO t1 VALUES (1000);
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COMMIT;
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connection default
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SELECT * FROM t1;
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s1
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1
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2
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-1
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Should get same result as above (i.e should not read '1000')
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COMMIT;
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT;
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SET @@completion_type=1;
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COMMIT AND NO CHAIN;
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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START TRANSACTION;
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TRUNCATE TABLE t1;
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INSERT INTO t1 VALUES (1000);
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SELECT * FROM t1;
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s1
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1000
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Should read '1000'
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connection con1
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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connection default
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SELECT * FROM t1;
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s1
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1000
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Should only read the '1000' as this transaction is now in REP READ
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COMMIT AND NO CHAIN;
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SET @@completion_type=0;
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COMMIT AND NO CHAIN;
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SET @autocommit=1;
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COMMIT;
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DROP TABLE t1;
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#
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# End of test cases for Bug#20837
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#
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