Provided by: postgresql-client-8.4_8.4.11-1_amd64
ROLLBACK - abort the current transaction
ROLLBACK [ WORK | TRANSACTION ]
ROLLBACK rolls back the current transaction and causes all the updates made by the transaction to be discarded.
WORK TRANSACTION Optional key words. They have no effect.
Use COMMIT [commit(7)] to successfully terminate a transaction. Issuing ROLLBACK when not inside a transaction does no harm, but it will provoke a warning message.
To abort all changes: ROLLBACK;
The SQL standard only specifies the two forms ROLLBACK and ROLLBACK WORK. Otherwise, this command is fully conforming.
BEGIN [begin(7)], COMMIT [commit(7)], ROLLBACK TO SAVEPOINT [rollback_to_savepoint(7)]