SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toMonth (children 1)
     ExpressionList (children 1)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2017-12-31 18:59:58\'