SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function minus (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2001-09-28 23:00:00\'
      Function toIntervalHour (children 1)
       ExpressionList (children 1)
        Literal UInt64_23
