首先,来至官方的定义:MyDac是支持多线程的
Are the MyDAC connection components thread-safe?Yes, MyDAC is thread-safe but there is a restriction. The same TMyConnection object cannot be used in several threads simultaneously. So if you have a multithreaded application, you should have a TMyConnection object for each thread that uses MyDAC.
https://www.devart.com/mydac/faq.html
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