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.

SEE ALSO

PREPARE TRANSACTION (PREPARE_TRANSACTION(7)), COMMIT PREPARED (COMMIT_PREPARED(7))