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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
351 lines
7.1 KiB
Plaintext
351 lines
7.1 KiB
Plaintext
--source include/have_innodb.inc
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connect (con1,localhost,root,,);
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--echo #
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--echo # Bug#20837 Apparent change of isolation level
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--echo # during transaction
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--echo #
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--echo # Bug#53343 completion_type=1, COMMIT/ROLLBACK
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--echo # AND CHAIN don't preserve the isolation
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--echo # level
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#
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# A set of test cases that verifies operation of
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# transaction isolation level and chaining is
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# provided
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# init
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--echo connection default;
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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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#
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# Verify that SET TRANS ISO LEVEL is not allowed
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# inside a transaction
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#
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START TRANSACTION;
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--error ER_CANT_CHANGE_TX_ISOLATION
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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COMMIT;
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#
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# Verify consistent output from
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# SELECT @@tx_isolation (Bug#20837)
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#
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# The transaction will be in READ UNCOMMITTED mode,
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# but SELECT @@tx_isolation should report the session
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# value, which is REPEATABLE READ
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#
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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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--echo Should be REPEATABLE READ
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SELECT * FROM t1;
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SELECT @@tx_isolation;
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--echo Should be REPEATABLE READ
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INSERT INTO t1 VALUES (-1);
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SELECT @@tx_isolation;
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--echo Should be REPEATABLE READ
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COMMIT;
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#
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# Verify that a change in the session variable
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# does not affect the currently started
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# transaction
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#
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START TRANSACTION;
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SELECT * FROM t1;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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--echo connection con1
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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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--echo connection default
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connection default;
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--echo We should not be able to read the '1000'
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SELECT * FROM t1;
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COMMIT;
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--echo Now, the '1000' should appear.
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START TRANSACTION;
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SELECT * FROM t1;
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COMMIT;
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# restore the session value
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SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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#
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# A set of test cases for verification that
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# isolation level during chaining works. MySQL
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# has three variants of chaining, i.e
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# COMMIT AND CHAIN, ROLLBACK AND CHAIN, and
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# the use of @completion_type
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#
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#
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# Verify isolation level with COMMIT AND CHAIN
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#
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# COMMIT AND CHAIN causes a new transaction to
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# begin as soon as the current ends, and the new
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# transaction will have the same tran. iso. level
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# as the first.
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#
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--echo connection default
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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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--echo connection con1
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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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--echo connection default
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connection default;
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SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
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--echo Should be 1
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COMMIT AND CHAIN;
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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--echo connection default
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connection default;
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SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
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--echo Should be 1
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COMMIT;
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SELECT * FROM t1;
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT;
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#
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# Verify isolation level with ROLLBACK AND CHAIN
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#
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--echo connection default
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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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--echo connection con1
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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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--echo connection default
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connection default;
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SELECT COUNT(*) FROM t1 WHERE s1 = 1001;
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--echo Should be 1
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ROLLBACK AND CHAIN;
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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--echo connection default
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connection default;
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SELECT COUNT(*) FROM t1 WHERE s1 = 1002;
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--echo Should be 1
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COMMIT;
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SELECT * FROM t1;
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DELETE FROM t1 WHERE s1 >= 1000;
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COMMIT;
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#
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# Verify isolation level with @completion_type=1.
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# (A @@completion_type value of 1 is equivalentl to
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# explicitly adding "AND CHAIN" to COMMIT or ROLLBACK)
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#
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#
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# Verify that COMMIT AND NO CHAIN overrides the value
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# of @@completion_type
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#
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SET @@completion_type=1;
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--echo connection default
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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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--echo connection con1
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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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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001
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COMMIT AND NO CHAIN;
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--echo default transaction is now in REPEATABLE READ
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001 and 1002
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1003);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001 and 1002, but NOT 1003
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COMMIT;
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SELECT * FROM t1;
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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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#
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# Verify that ROLLBACK AND NO CHAIN overrides the value
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# of @@completion_type
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#
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--echo connection default
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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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--echo connection con1
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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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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001
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ROLLBACK AND NO CHAIN;
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--echo default transaction is now in REPEATABLE READ
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1002);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001 and 1002
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1003);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1 WHERE s1 >= 1000;
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--echo Should see 1001 and 1002, but NOT 1003
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COMMIT;
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SELECT * FROM t1;
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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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#
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# Verify that in the sequence:
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# SET TRANSACTION ISOLATION LEVEL
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# SET SESSION ISOLATION LEVEL
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#
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# SET SESSION ISOLATION LEVEL has precedence over
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# SET TRANSACTION. (Note that this is _not_
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# in accordance with ISO 9075.)
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#
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--echo connection default
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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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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1000);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1;
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--echo 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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#
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# Verify that a transaction ended with an
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# implicit commit (i.e a DDL statement), the
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# @@completetion_type setting is ignored, and
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# the next transaction's isolation level is
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# the session level.
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#
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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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--echo Should read '1000'
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--echo connection con1
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connection con1;
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INSERT INTO t1 VALUES (1001);
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COMMIT;
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--echo connection default
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connection default;
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SELECT * FROM t1;
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--echo 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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#
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# Cleanup
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#
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SET @autocommit=1;
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COMMIT;
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disconnect con1;
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DROP TABLE t1;
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--echo #
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--echo # End of test cases for Bug#20837
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--echo #
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