In MySQL, sometime we may write
where `attrib`&1=0
It means the LSB of `attrib` is 0.
However, it is different in C, because = have a higher precedence there, and we must use (attrib&1)==0 in C.
We'd better say, for those who is used to that [= have a higher precedence than & in C], it is more natural in MySQL and that bracket can be removed.

Precedence in C:
Precedence in MySQL: