Date/time-operations - need help

[Former Member]

Hi there,

I have a simple question but i don't have really good ideas to solve the problem with ABAP.

This is the situation in which I need help:

I have many date/time-pairs (every in a single variable of type d and t). Now I want to compare one date/time-pair with a given date (also as pair). This will give a time difference between the two dates.

After that I want that all other date/time-pairs are shifted by this time difference (can be + and -).

So now my solution yet:

* FORM for calculation the time difference between 2 dates
FORM idoc_compare_dates  USING    iv_date_orig
                                  iv_time_orig
                                  iv_date_new
                                  iv_time_new
                         CHANGING cv_diff       TYPE p.

  DATA: lv_timestamp_orig    TYPE timestamp,
        lv_timestamp_new     TYPE timestamp.

* Creating timestamps for comparison
  CONVERT DATE iv_date_orig TIME iv_time_orig
    INTO TIME STAMP lv_timestamp_orig TIME ZONE sy-zonlo.
  CONVERT DATE iv_date_new TIME iv_time_new
    INTO TIME STAMP lv_timestamp_new TIME ZONE sy-zonlo.

* Calculation the time difference 
  cv_diff = lv_timestamp_new - lv_timestamp_orig.

ENDFORM.                    " IDOC_COMPARE_DATES

* *********************************************************************

* FORM for shifting a date by the time period calculated in the first FORM
FORM idoc_calc_single_date  USING    iv_diff      TYPE p
                                     iv_date_orig
                                     iv_time_orig
                            CHANGING cv_date_new
                                     cv_time_new.

  DATA: lv_timestamp_orig   TYPE timestamp,
        lv_timestamp_new    TYPE timestamp.

* Creating a timestamp for the original date
  CONVERT DATE iv_date_orig TIME iv_time_orig
    INTO TIME STAMP lv_timestamp_orig TIME ZONE sy-zonlo.

* Shifting the date
  lv_timestamp_new = lv_timestamp_orig + iv_diff.

* Creating the new date into the output-variables
  CONVERT TIME STAMP lv_timestamp_new TIME ZONE sy-zonlo
    INTO DATE cv_date_new TIME cv_time_new.

ENDFORM.                    " IDOC_CALC_SINGLE_DATE

I am not sure if this coding above is really correct. Can you please check it? Perhaps you have also other ideas to solve this problem?

Thank you!!

Kind regards

[Former Member]

u can check this class

CL_ABAP_TSTMP

it has methods to compare timestamps, add, subtract etc

кu03B1ятu03B9к

[Former Member]

Hi,

As far as I think its absolutely correct....

but also try with one small change if you get the required output...

* Shifting the date
  lv_timestamp_new = lv_timestamp_orig + iv_diff.   "  if iv_diff is negative it will be subtract automatically.

Regards,

Siddarth

[Former Member]

Thank you for your answers. Now I've created a small dummy-report, that tests the logic. And I think it seems to be okay.

You can also check it if you want to with this small report:

REPORT  zjz_test_timediff.

PARAMETERS: p_dat1  TYPE sydatum DEFAULT sy-datum,
            p_zei1  TYPE syuzeit DEFAULT sy-uzeit,
            p_dat2  TYPE sydatum DEFAULT sy-datum,
            p_zei2  TYPE syuzeit DEFAULT sy-uzeit.

SELECTION-SCREEN: SKIP 2.

PARAMETERS: p_diff type p.

SELECTION-SCREEN: SKIP 2.

PARAMETERS: p_dat3  TYPE sydatum,
            p_zei3  TYPE syuzeit.


DATA: lv_timestamp_orig   TYPE timestamp,
      lv_timestamp_new    TYPE timestamp,
      lv_diff             TYPE p.

AT SELECTION-SCREEN.

  PERFORM idoc_compare_dates USING p_dat1
                                   p_zei1
                                   p_dat2
                                   p_zei2
                          CHANGING p_diff.

  PERFORM idoc_calc_single_date USING p_diff
                                      p_dat1
                                      p_zei1
                             CHANGING p_dat3
                                      p_zei3.


*&---------------------------------------------------------------------*
*&      Form  IDOC_COMPARE_DATES
*&---------------------------------------------------------------------*
FORM idoc_compare_dates  USING    iv_date_orig
                                  iv_time_orig
                                  iv_date_new
                                  iv_time_new
                         CHANGING cv_diff       TYPE p.

  DATA: lv_timestamp_orig    TYPE timestamp,
        lv_timestamp_new     TYPE timestamp.


  CONVERT DATE iv_date_orig TIME iv_time_orig
    INTO TIME STAMP lv_timestamp_orig TIME ZONE sy-zonlo.
  CONVERT DATE iv_date_new TIME iv_time_new
    INTO TIME STAMP lv_timestamp_new TIME ZONE sy-zonlo.

  cv_diff = lv_timestamp_new - lv_timestamp_orig.

ENDFORM.                    " IDOC_COMPARE_DATES

*&---------------------------------------------------------------------*
*&      Form  IDOC_CALC_SINGLE_DATE
*&---------------------------------------------------------------------*
FORM idoc_calc_single_date  USING    iv_diff      TYPE p
                                     iv_date_orig
                                     iv_time_orig
                            CHANGING cv_date_new
                                     cv_time_new.

  DATA: lv_timestamp_orig   TYPE timestamp,
        lv_timestamp_new    TYPE timestamp.

  CONVERT DATE iv_date_orig TIME iv_time_orig
    INTO TIME STAMP lv_timestamp_orig TIME ZONE sy-zonlo.

  lv_timestamp_new = lv_timestamp_orig + iv_diff.

  CONVERT TIME STAMP lv_timestamp_new TIME ZONE sy-zonlo
    INTO DATE cv_date_new TIME cv_time_new.

ENDFORM.                    " IDOC_CALC_SINGLE_DATE