SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function randomFixedString (children 1)
     ExpressionList (children 1)
      Function modulo (children 1)
       ExpressionList (children 2)
        Function rand (children 1)
         ExpressionList
        Literal UInt64_10