1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
#
# Simple test of the transaction log for when a START TRANSACTION ... COMMIT
# is issued, but no data modifications actually occurred. Also tested is
# a update that does not update anything.
#
# This situation occurs in, for instance, sysbench, which wraps even SELECTs
# in a transaction.
#
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 (
id INT NOT NULL PRIMARY KEY
, padding VARCHAR(200) NOT NULL
);
INSERT INTO t1 VALUES (1, "I love testing.");
INSERT INTO t1 VALUES (2, "I hate testing.");
UPDATE t1 SET id=1 WHERE padding='I love testing.';
START TRANSACTION;
SELECT * FROM t1 WHERE id = 1;
SELECT * FROM t1 WHERE id = 2;
COMMIT;
|