Sort Datetime Type in SAP ABAP

In SAP ABAP, sorting datetime type fields requires understanding how to compare and order date and time values. There are two primary comparison operators LT (Less than) and GT (Greater Than) which you can use to perform basic comparisons between two datetime variables.

You can frame the sorting logic as per your requirement whether you have a set of variables or an internal table. If it involves a set of variables then you need to do manual comparisons using conditional statements.

Sorting Datetime Variables

When working with datetime variables, you can use simple comparison logic to determine the chronological order ?

DATA: lv_date1 TYPE sy-datum VALUE '20231201',
      lv_time1 TYPE sy-uzeit VALUE '143000',
      lv_date2 TYPE sy-datum VALUE '20231202', 
      lv_time2 TYPE sy-uzeit VALUE '093000'.

IF lv_date1 LT lv_date2.
  WRITE: 'Date1 is earlier than Date2'.
ELSEIF lv_date1 GT lv_date2.
  WRITE: 'Date1 is later than Date2'.
ELSE.
  IF lv_time1 LT lv_time2.
    WRITE: 'Same date, but Time1 is earlier'.
  ENDIF.
ENDIF.

Sorting Internal Tables with Datetime

For internal tables containing datetime fields, use the SORT statement which automatically handles datetime comparisons ?

TYPES: BEGIN OF ty_datetime,
         date_field TYPE sy-datum,
         time_field TYPE sy-uzeit,
         description TYPE string,
       END OF ty_datetime.

DATA: lt_datetime_table TYPE TABLE OF ty_datetime.

" Sort by date ascending, then by time ascending
SORT lt_datetime_table BY date_field ASCENDING 
                          time_field ASCENDING.

" Sort by date descending
SORT lt_datetime_table BY date_field DESCENDING.

Conclusion

Sorting datetime types in SAP ABAP can be accomplished through comparison operators for simple variables or the SORT statement for internal tables. The system automatically handles the chronological ordering of date and time values.