Hello Developers
           My name is sachin , a third year undergrad student in India.I am interested in gsoc 2016
I was debugging the maria db for following query 

create table c4(a1 int primary key,b1 int unique,c1 blob) engine=myisam;

In mysql_prepare_create_table  there is a function name prepare_create_field which sets the sql_field pack flag . for a1 field it sets the pack flag =27  . do not quiet get what it means.