SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier res
    Function if (alias res) (children 1)
     ExpressionList (children 3)
      Literal UInt64_1
      Literal Array_[UInt64_1, UInt64_2, UInt64_3]
      Function CAST (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal \'str_1\'
        Literal \'Nullable(String)\'
