SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function minus (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 3)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_3
      Literal Array_[UInt64_1, UInt64_2, UInt64_3]
