MySQL 8.0 Release Notes
MySQL 8.0 Source Code Documentation
This section describes data structures specific to asynchronous C API functions. For information about general-purpose C API data structures, see Section 28.7.5, “C API Data Structures”.
enum net_async_statusThe enumeration type used to express the return status of asynchronous C API functions. The following table shows the permitted status values.
Enumeration Status Value Description NET_ASYNC_COMPLETEAsynchronous operation is complete NET_ASYNC_NOT_READYAsynchronous operation is still in progress NET_ASYNC_ERRORAsynchronous operation terminated in error NET_ASYNC_COMPLETE_NO_MORE_RESULTSFor mysql_next_result_nonblocking(); indicates no more results availableFor more information, see Section 28.7.12, “C API Asynchronous Interface”.