SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function plus (children 1)
     ExpressionList (children 2)
      Literal Array_[Array_[UInt64_1, UInt64_1], Array_[UInt64_2]]
      Literal Array_[Array_[UInt64_12, UInt64_1], Array_[UInt64_1]]
