SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayElement (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 1)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal UInt64_18446744073709551615