ABORT — abort the current transaction
ABORT [ WORK | TRANSACTION ]
ABORT
rolls back the current transaction and causes
all the updates made by the transaction to be discarded.
This command is identical
in behavior to the standard SQL command
ROLLBACK,
and is present only for historical reasons.
Use COMMIT to successfully terminate a transaction.
Issuing ABORT
when not inside a transaction does
no harm, but it will provoke a warning message.