SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function changeMonth (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2000-01-01 11:22:33\'
      Literal UInt64_13