ROLLBACK - abort the current transaction
ROLLBACK [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
rolls back the current transaction and causes
all the updates made by the transaction to be discarded.
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.
Use COMMIT to successfully terminate a transaction.
outside of a transaction
block emits a warning and otherwise has no effect.
outside of a transaction block is an error.
To abort all changes:
conforms to the SQL standard. The
is a PostgreSQL extension.