SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function empty (children 1)
     ExpressionList (children 1)
      Function toFixedString (children 1)
       ExpressionList (children 2)
        Literal \'\'
        Function plus (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Function modulo (children 1)
           ExpressionList (children 2)
            Function randConstant (children 1)
             ExpressionList
            Literal UInt64_100