DateTime is not bind/extract correctly from MySQL database. Milisecond and microseconds are corrupted.

Binding

Miliseconds are bind by this code:

But MYSQL_TIME::second_part contains both milisecond and microsecond as one number. So the previous code makes microseconds from miliseconds. For example 0.333555 seconds (333 miliseconds and 555 microseconds) is bind as mt.second_part = 333 (it means 333 microseconds), but it should be bind as mt.second_part = 333555.

Extraction

Extraction is done by code:

Assigment mt.second_part to DateTime causes assertion violation, because miliseconds in DateTime must be smaller or equal 999. But mt.second_part may contains much bigger values.