ROLLBACK
ROLLBACK
ROLLBACK - abort 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 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.
Notes
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.
Examples
To abort all changes:
ROLLBACK;
Compatibility
The command
ROLLBACK
conforms to the SQL standard. The
form
ROLLBACK TRANSACTION
is a PostgreSQL extension.