SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function dateDiff (children 1)
     ExpressionList (children 3)
      Literal \'h\'
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2018-01-01 22:00:00\'
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2018-01-02 23:00:00\'
