Tries to fetch the next query result from mg_session.
The owner of the returned result is mg_sessionsession, and the
result is destroyed on next call to mg_session_fetch.
Return: On success, 0 or 1 is returned. Exit code 1 means that a new result
row was obtained and stored in result and its contents may be
accessed using mg_result_row. Exit code 0 means that there are
no more result rows and that the query execution summary was stored
in result. Its contents may be accessed using mg_result_summary.
On failure, a non-zero exit code is returned.
Tries to fetch the next query result from mg_session.
The owner of the returned result is mg_session session, and the result is destroyed on next call to mg_session_fetch.
Return: On success, 0 or 1 is returned. Exit code 1 means that a new result row was obtained and stored in result and its contents may be accessed using mg_result_row. Exit code 0 means that there are no more result rows and that the query execution summary was stored in result. Its contents may be accessed using mg_result_summary. On failure, a non-zero exit code is returned.