abap - Storing result of date arithmetic in string -


the following code supposed subtract 10 days given date, store result in string variable , write it.

data str type string. data date type d.  date = '20130418'. " 2013-04-18 str = date - 10.  write str.

i expect output 2013-04-08 or @ least unformated 20130408. actual output quite mysterious number doesn't make sense me @ all:

734967

can explain me number comes from?

i found workaround (just put result in variable of type d , assign variable string), still interested in explanation strange result.

sap_basis release 702.

take @ conversion rules: substraction, date converted number of days since 01.01.0001 internally (source type date, target type i), arithmetics take place. if result date field, conversion (source type i/packed, target type d) form yyyymmdd applied. however, conversion i/packed string defined differently - string contains number of days between result date , 01.01.0001.


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