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CREATE TABLE t1 (
f1 VARCHAR(255) PRIMARY KEY
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES ('текст');
SELECT f1 = 'текст' FROM t1;
f1 = 'текст'
1
SET AUTOCOMMIT=OFF;
START TRANSACTION;
UPDATE t1 SET f1 = 'текст2';
SET AUTOCOMMIT=OFF;
START TRANSACTION;
UPDATE t1 SET f1 = 'текст3';
COMMIT;
COMMIT;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
SELECT f1 = 'текст2' FROM t1;
f1 = 'текст2'
1
SELECT f1 = 'текст2' FROM t1 WHERE f1 = 'текст2';
f1 = 'текст2'
1
START TRANSACTION;
INSERT INTO t1 VALUES ('текст4');
START TRANSACTION;
INSERT INTO t1 VALUES ('текст4');
COMMIT;
COMMIT;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
COMMIT;
DROP TABLE t1;
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