Date calculation check in a badi

Question

Hi all I want to do a check calculation in a badi - on an internal table of dates. In normal abap I was able to do it easily. but in oo abap, its not allowing me to do the arethmatic calculation on date fields.Below is the code:
method IF_EX_PT_ABS_REQ~GET_WORKFLOW_ATTRIBS.
begda type pa2001-begda,
end of date1.
data: zbegda type table of date1,
zbegdah type table of date1,
line1 like line of zbegdah.
*data zbegda like pa2001-begda occurs 0 with header line.
*data zbegdah like pa2001-begda occurs 0 with header line.
select begda from pa2001 into table zbegda
where pernr = pernr1.
zbegdah[] = zbegda[].
clear zbegda[].
loop at zbegdah into line1.
add 1 to zbegdah. "<------ THIS LINE IS GIVING ME ERROR
*line1-begda = zbegdah + 1.
append line1 to zbegda.
endloop.
loop at zbegda into line1.
if line1-begda eq bdate.
MESSAGE i074(hrtim_abs_req).
endif.
endloop.
endmethod.
Actually, in my EP leave request workflow I want to give an error message, if the user applies for a leave of say 5th april, and he already has an approved leave of 6th of april - which is stored in infotype 21.
There is a badi - SE18 ->  Enhancement Spots PT_ABS_REQ. In this, I am creating implimentation and I am writing the code in the method - IF_EX_PT_ABS_REQ~GET_WORKFLOW_ATTRIBS.
I also want to know that if i declare 2 fields - PERNR1 and bdate ( begin date of leave)  in attributes, which I did, would they be passed from EP at runtime? if not, what should I do to get them in my method?
Please suggest.
Thanks
Ribhu

Answer 1

HI Ribhu ,
what are u trying to do  with this <b>add 1 to zbegdah. "<------ THIS LINE IS GIVING ME ERROR</b> ?---> u are getting error bcos u are trying to add one to the table work area which is wrong.
work area  is in char and u are adding NUM to CHAR.
u cant to add 1 day date  or one record to ZBEGDAH.
if u want to add one day then u have to call
loop at zbegdah.
zbegdah-begda =  zbegdah-begda + 1.
modify zbegdah.
endloop.
Regards
Peram