ROLLBACK

This statement reverts all changes in the current transaction inside of TIDB. It is the opposite of a COMMIT statement.

Synopsis

RollbackStmt

ROLLBACK - 图1

CompletionTypeWithinTransaction

ROLLBACK - 图2

  1. RollbackStmt ::=
  2.     'ROLLBACK' CompletionTypeWithinTransaction?
  4. CompletionTypeWithinTransaction ::=
  5.     'AND' ( 'CHAIN' ( 'NO' 'RELEASE' )? | 'NO' 'CHAIN' ( 'NO'? 'RELEASE' )? )
  6. |   'NO'? 'RELEASE'

Examples

  1. mysql> CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY);
  2. Query OK, 0 rows affected (0.12 sec)
  4. mysql> BEGIN;
  5. Query OK, 0 rows affected (0.00 sec)
  7. mysql> INSERT INTO t1 VALUES (1);
  8. Query OK, 1 row affected (0.00 sec)
  10. mysql> ROLLBACK;
  11. Query OK, 0 rows affected (0.01 sec)
  13. mysql> SELECT * FROM t1;
  14. Empty set (0.01 sec)

MySQL compatibility

  • TiDB parses but ignores the syntax ROLLBACK AND [NO] RELEASE. This functionality is used in MySQL to disconnect the client session immediately after rolling back the transaction. In TiDB, it is recommended to instead use the mysql_close() functionality of your client driver.
  • TiDB parses but ignores the syntax ROLLBACK AND [NO] CHAIN. This functionality is used in MySQL to immediately start a new transaction with the same isolation level while the current transaction is being rolled back. In TiDB, it is recommended to instead start a new transaction.

See also