ROLLBACK PREPARED
Name
ROLLBACK PREPARED -- cancel a transaction that was earlier prepared for two-phase commit
Synopsis
ROLLBACK PREPARED transaction_id
Description
ROLLBACK PREPARED rolls back a transaction that is in
prepared state.
Parameters
- transaction_id
The transaction identifier of the transaction that is to be
rolled back.
Notes
To roll back a prepared transaction, you must be either the same user that
executed the transaction originally, or a superuser. But you do not
have to be in the same session that executed the transaction.
This command cannot be executed inside a transaction block. The prepared
transaction is rolled back immediately.
All currently available prepared transactions are listed in the
pg_prepared_xacts
system view.
Examples
Roll back the transaction identified by the transaction
identifier foobar:
ROLLBACK PREPARED 'foobar';
Compatibility
ROLLBACK PREPARED is a
PostgreSQL extension. It is intended for use by
external transaction management systems, some of which are covered by
standards (such as X/Open XA), but the SQL side of those systems is not
standardized.