|ABORT(7)||PostgreSQL 12.2 Documentation||ABORT(7)|
ABORT [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
Optional key words. They have no effect.
If AND CHAIN is specified, a new transaction is immediately started with the same transaction characteristics (see SET TRANSACTION (SET_TRANSACTION(7))) as the just finished one. Otherwise, no new transaction is started.
Issuing ABORT outside of a transaction block emits a warning and otherwise has no effect.