Hi, how did u do de-emphasis of sql statements?

[MID.night]

Hey man, I would like to ask a question about de-emphasis of sql statements? I
 
Mean mysql engines have to be aware of which two statements are exactly the same
 
Despite of variables?? values at runtime. Because in slow log, the execution 
counter is
 
Maintained for each sql statement. De-emphasis is obviously behind the back. 
 
Like select * from table where name>??A?? is just
 
The same as select * from table where name>??B??. 
 
 How did u do this emphasis?