Name
ROLLBACK
-- Aborts the current transaction
Synopsis
ROLLBACK [ WORK | TRANSACTION ]
|
Inputs
- WORK
Optional keyword. Has no effect.
- TRANSACTION
Optional keyword. Has no effect.
Outputs
- ABORT
Message returned if successful.
- NOTICE: ROLLBACK: no transaction in progress
If there is not any transaction currently in progress.
Description
ROLLBACK rolls back the current transaction and causes
all the updates made by the transaction to be discarded.
Notes
Use COMMIT
to successfully terminate a transaction.
ABORT is a synonym for ROLLBACK.
Usage
To abort all changes:
CREATE TABLE t1 (
i1 integer
);
INSERT INTO t1 (i1) VALUES (1);
INSERT INTO t1 VALUES (2);
BEGIN;
DELETE FROM t1;
ROLLBACK;
SELECT * FROM t1;
|
t1 should contains values 1 and 2
Compatibility
SQL92
SQL92 only specifies the two forms ROLLBACK
and ROLLBACK WORK. However, these are implemented
in a fully compatible way.