AlterQuery  t_missed_subcolumns (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_COLUMN (children 1)
   ColumnDeclaration arr (children 2)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
    Literal Array_[UInt64_1, NULL, UInt64_3]
 Identifier t_missed_subcolumns
