SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toString (children 1)
     ExpressionList (children 2)
      Function toStartOfFifteenMinutes (children 1)
       ExpressionList (children 2)
        Function toDateTime (children 1)
         ExpressionList (children 1)
          Literal UInt64_1549483055
        Literal \'Europe/Paris\'
      Literal \'Europe/Paris\'