ROLLBACK¶

Rolls back an open transaction in the current session.

See also:: BEGIN , COMMIT , SHOW TRANSACTIONS , DESCRIBE TRANSACTION

Syntax¶

ROLLBACK [ WORK ]

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Parameters¶

WORK: Optional keyword that provides compatibility with other database systems.

Examples¶

Begin a transaction, insert some values into a table, and then complete the transaction by rolling back the changes made in the transaction:

SELECT COUNT(*) FROM A1;

+----------+
| COUNT(*) |
|----------+
|        0 |
+----------+

BEGIN NAME T4;

SELECT CURRENT_TRANSACTION();

+-----------------------+
| CURRENT_TRANSACTION() |
|-----------------------+
| 1432071523422         |
+-----------------------+

INSERT INTO A1 VALUES (1), (2);

+-------------------------+
| number of rows inserted |
|-------------------------+
| 2                       |
+-------------------------+

ROLLBACK;

SELECT COUNT(*) FROM A1;

+----------+
| COUNT(*) |
|----------+
|        0 |
+----------+

SELECT CURRENT_TRANSACTION();

+-----------------------+
| CURRENT_TRANSACTION() |
|-----------------------+
| [NULL]                |
+-----------------------+

SELECT LAST_TRANSACTION();

+--------------------+
| LAST_TRANSACTION() |
|--------------------+
| 1432071523422      |
+--------------------+

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