How to subtract 1 from a date field???

[Former Member]

Howdy,

I want to get the previous day to the one that is entered by the user. Thereofre I coded the following:

Code:

<b>DATA: lv_date TYPE date,

new_datab TYPE knvh-datab.

lv_date = new_datab.

lv_date = lv_date - 1. </b>

lv_date should now have the previous day to that entered in new_date.

However I ran it for today 01.03.2005 and it does not give me 28.02.2005?

Instead it gives me 00.03.2005????

Does anyone know why this would be occurring?

[RichHeilman]

Make sure that your fields are "date" fields. Type sy-datum or type d.

parameters: p_datum type sy-datum.

p_datum = p_datum - 1.

Regards,

Rich Heilman

[RichHeilman]

In other words, change this line from

DATA: lv_date TYPE date,

to

DATA: lv_date TYPE sy-datum,

Regards,

Rich Heilman

[christian_wohlfahrt]

Hi Steve,

you should have value 20050301 in new_datab (internal format!).

Then

SUBTRACT 1 FROM lv_date.

will work (at least date adding / subtracting is handled internally correct).

Regards,

Christian

[Former Member]

You should be a doctor Rich! You've cured my headache

Do you know why type <b>date</b> does not work?

Thanks again!

[RichHeilman]

I would say because that data element "date" uses the domain CHAR08 which is a CHAR data type. On the other hand, data element "sydatum" uses the domain SYDATS which is a DATS data type.

Regards,

Rich Heilman