SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function multiply (children 1)
     ExpressionList (children 2)
      Function rand (children 1)
       ExpressionList (children 1)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal UInt64_4
          Literal \'Nullable(UInt8)\'
      Literal UInt64_0