At the end of a transaction, the application calls IIapi_commit() or IIapi_rollback() before starting another transaction within the connection. IIapi_commit() ends the transaction by committing all SQL statements upon completion, thereby guaranteeing that changes to the database are permanent. IIapi_rollback() ends the transaction by aborting all query statements being executed within the transaction unless a savepoint handle is specified. For XA transactions, the association between the transaction and connection is dropped by calling IIapi_xaEnd().