Comment by mbrubeck

I think tdavis is referring to this example from maciej's post, where inserting 'y' into a tinyint field silently converts it to 0 instead of throwing an error:

     mysql> create table demo(int tinyint(1), bin binary(1));
     mysql> insert into demo(int, bin) values ('y', 'y');
     mysql> select * from demo;

     +------+------+
     | int  | bin  | 
     +------+------+
     |    0 | y    |
     +------+------+