this will return: "(1 row(s) affected)" But now I need to know, what data was actually inserted? SQL Server has answered this question in 2005 with the OUTPUT statement: This will return a dataset ...

asyncmy is not handling the new syntax for doing bulk inserts correctly. The same issue also exists in aiomysql with a good explanation of what is happening. That issue is: aio-libs/aiomysql#968 MySQL ...