How to get the byte size of resultset in an SQL query?

Question

Is it possible to get the size in bytes of the results of an sql query in MySQL?

For example:

select * from sometable;

ths returns

Answer 1

select sum(row_size) 
from (
  select 
    char_length(column1)+
    char_length(column2)+
    char_length(column3)+
    char_length(column4) ... <-- repeat for all columns
  as row_size 
  from your_table
) as tbl1;

char_length for enum, set might not accurate, please take note