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42 lines
973 B
Text
42 lines
973 B
Text
CREATE TABLE t1 (f1 ENUM('', 'one', 'two'), KEY (f1)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES ('');
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INSERT INTO t1 VALUES ('one'), ('two');
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INSERT INTO t1 VALUES (0), (1), (2);
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Warnings:
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Warning 1265 Data truncated for column 'f1' at row 1
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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6
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SELECT COUNT(*) FROM t1 where f1 = '';
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COUNT(*)
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2
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SELECT COUNT(*) FROM t1 where f1 = 'one';
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COUNT(*)
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2
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DROP TABLE t1;
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CREATE TABLE t1 (f1 ENUM('', 'one', 'two', 'three', 'four') PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (''), ('one'), ('two');
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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3
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SELECT COUNT(*) FROM t1 WHERE f1 = '';
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COUNT(*)
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1
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SET AUTOCOMMIT=OFF;
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START TRANSACTION;
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UPDATE t1 SET f1 = 'three' where f1 = '';
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SET AUTOCOMMIt=OFF;
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START TRANSACTION;
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UPDATE t1 SET f1 = 'four' where f1 = '';
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COMMIT;
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COMMIT;
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ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
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SELECT COUNT(*) FROM t1 WHERE f1 = 'three';
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COUNT(*)
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1
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SELECT * FROM t1;
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f1
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one
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two
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three
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DROP TABLE t1;
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