ROLLBACK
This statement reverts all changes in the current transaction inside of TIDB. It is the opposite of a COMMIT statement.
Synopsis
- RollbackStmt
- CompletionTypeWithinTransaction
RollbackStmt ::=
'ROLLBACK' CompletionTypeWithinTransaction?
CompletionTypeWithinTransaction ::=
'AND' ( 'CHAIN' ( 'NO' 'RELEASE' )? | 'NO' 'CHAIN' ( 'NO'? 'RELEASE' )? )
| 'NO'? 'RELEASE'
Examples
mysql> CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY);
Query OK, 0 rows affected (0.12 sec)
mysql> BEGIN;
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO t1 VALUES (1);
Query OK, 1 row affected (0.00 sec)
mysql> ROLLBACK;
Query OK, 0 rows affected (0.01 sec)
mysql> SELECT * FROM t1;
Empty set (0.01 sec)
MySQL compatibility
- TiDB does not support savepoints or the syntax
ROLLBACK TO SAVEPOINT. - 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 themysql_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.