SPI_rollback, SPI_rollback_and_chain - abort the current transaction
void SPI_rollback(void)
void SPI_rollback_and_chain(void)
SPI_rollback rolls back the current transaction. It is approximately
equivalent to running the SQL command ROLLBACK. After a transaction is
rolled back, a new transaction has to be started using
SPI_start_transaction before further database actions can be executed.
SPI_rollback_and_chain is the same, but a new transaction
is immediately started with the same transaction characteristics as the just
finished one, like with the SQL command ROLLBACK AND CHAIN.
These functions can only be executed if the SPI connection has
been set as nonatomic in the call to SPI_connect_ext.