ROLLBACK — abort the current transaction
ROLLBACK [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
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.
AND CHAIN
#
If AND CHAIN
is specified, a new (not aborted)
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.
Issuing 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;
The command ROLLBACK
conforms to the SQL standard. The
form ROLLBACK TRANSACTION
is a PostgreSQL extension.