如何从abap中的日期获取天数？

Question

I need to convert a date in 'MM/DD/YYYY' format to a number that say which day in the year it is. IE '01/01/YYYY'=1 and '12/31/YYYY'=365. Is there any built in function to do this in ABAP? I've tried googling but I couldn't find any functions which did this

Answer 1

It is absolutely unnecessary to rely on any function module that may or may not be present in your system. Just use basic built-in language elements:

DATA: l_my_date TYPE d, " note that the data type D is YYYYMMDD 
      l_jan_01  TYPE d, " This will be jan 1 of the needed year
      l_day     TYPE i.

l_my_date = ...whatever... 
l_jan_01 = l_my_date. 
l_jan_01+4 = '0101'. " or any other means to get the first day of the year. 
l_day = l_my_date - l_jan_01 + 1.    

Answer 2

给你一行代码：

DATA(g_day) = p_date - CONV d( p_date(4) && '0101' ) + 1.

Answer 3

You can use this function module: HR_AUPBS_MONTH_DAY .

You have to pass an initial date and an end date, and it will return the number of days in between (this is what you want):

CALL FUNCTION 'HR_AUPBS_MONTH_DAY'
  EXPORTING BEG_DA     = P_BEGDA    " Here you should put the first day of the year
            END_DA     = P_ENDDA    " Here you put the date
  IMPORTING NO_CAL_DAY = P_CAL_DAY. " This is what you want