Yes, and you don't have to release your project's source (but you do have to release any modification you make to MySQL itself (only those not the whole program) if you also release your project in binary form containing the modified MySQL code)
In more simple terms, if you modify MySQL and those modifications end up being distributed in binary form you have to publicly release the aforementioned modifications.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
