SPI_rollback - Man Page

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 the transaction is rolled back, a new transaction is automatically started using default transaction characteristics, so that the caller can continue using SPI facilities​.

SPI_rollback_and_chain is the same, but the new transaction is 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​.