time_type_from_columns:
  src: 'log_at.strftime("%Y")'
  tem: "(var1.log_at ? var1.log_at.strftime(\"%Y\") : nil)"

text_type_from_columns:
  src: 'birth.strftime(format)'
  tem: "Date.parse('2009-06-02 18:44').strftime(var1.format)"
  res: '02.06.2009'

number_type_from_columns:
  src: "age + 15"
  tem: "(var1.age+15)"
  res: "20"

number_type_from_columns_no_default:
  src: "friend_id + 15"
  tem: "(var1.friend_id ? (var1.friend_id+15) : nil)"
  res: ""