Code from fb 2.5 does not work: update rdb$relation_fields set rdb$description = 'aaa' where rdb$field_name = 'new_name" and rdb$relation_name = 'table_name'
Update operation is not allowed for system table rdb$ralation_fields FB 3.0.2.32692 -- pozdr, Michał Kurczabiński
