ROLLBACK — abort the current transaction
ROLLBACK [ AUTONOMOUS ] [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
ROLLBACK rolls back the current transaction and causes all the updates made by the transaction to be discarded.
Optional key word that can be used when aborting an autonomous transaction. For details on autonomous transactions, see Chapter 16.
Optional key words. They have no effect.
AND CHAINis 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.
COMMIT to successfully terminate a transaction.
ROLLBACK outside of a transaction block emits a warning and otherwise has no effect.
ROLLBACK AND CHAIN outside of a transaction block is an error.
To abort all changes:
ROLLBACK conforms to the SQL standard. The form
ROLLBACK TRANSACTION is a Postgres Pro extension.