[Dbix-class] Automatic accessor creation

[dreel]

As I know the query joining two or more tables automatically creates accessors for main table columns  and other can be reached through $rs->get_column('col_name'). 
I'm using  get_column('col_name') for all columns even for main table columns asn it's working fine.
The question is why a part of columns get accessors automatially and other must be accessed manualy?

May be better to make automatic accessor creation for any column returned of defined in query?
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dr.eel