SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toString (children 1)
     ExpressionList (children 2)
      Function accurateCast (children 1)
       ExpressionList (children 2)
        Literal UInt64_19
        Literal \'DateTime\'
      Literal \'UTC\'