SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function dateDiff (children 1)
     ExpressionList (children 4)
      Literal \'day\'
      Function materialize (children 1)
       ExpressionList (children 1)
        Function toDate32 (children 1)
         ExpressionList (children 2)
          Literal \'1927-01-01\'
          Literal \'UTC\'
      Function toDateTime64 (children 1)
       ExpressionList (children 3)
        Literal \'1927-01-02 00:00:00\'
        Literal UInt64_3
        Literal \'UTC\'
      Literal \'UTC\'