Stops the current transaction.

Synopsis

ROLLBACK [WORK | TRANSACTION] [AND [NO] CHAIN]

Description

ROLLBACK rolls back the current transaction and causes all the updates made by the transaction to be discarded.

Parameters

WORK | TRANSACTION

Optional key words. They have no effect.

AND CHAIN

If AND CHAIN is specified, a new transaction is immediately started with the same transaction characteristics (see SET TRANSACTION) as the just finished one. Otherwise, no new transaction is started.

Notes

Use COMMIT to successfully end the current transaction.

Issuing ROLLBACK when not inside a transaction block emits a warning and otherwise has no effect. ROLLBACK AND CHAIN outside of a transaction block is an error.

Examples

To discard all changes made in the current transaction:

ROLLBACK;

Compatibility

The command ROLLBACK conforms to the SQL standard. The form ROLLBACK TRANSACTION is a WarehousePG extension.

See Also

BEGIN, COMMIT, ROLLBACK TO SAVEPOINT, SAVEPOINT

Parent topic: SQL Commands