Last day of each month in a year based on a Input date?

Question

Hi all,
I have a request from a customer who wants to have a yearly report created in BEx Query Designer which starts in January up to December and they want to have a Month To Date (MDT) and Year to Date (YTD) calculation of a key figure. This report will only show one year at the time based on the date the user give as input at the Variable Screen.
This key figure should be calculated by using the last date of each month for input when performing the MTD and YTD calculation and summarizations.
Example:
January: 31.01.2008  Key Figure = 1000. MTD = 1000 and YTD = 1000
February: 29.02.2008  Key Figure = 2500. MTD = (2500-1000) 1500 and YTD = 2500
March: 31.03.2008  Key Figure = 6000. MTD =(6000-2500)=3500 and YTD = 6000
Etcu2026.
This means that I have to have a lot of hidden Key figures which gets restricted on the different month end dates and formulas to calculate the different MTD and YTD results for the months as the year progresses.
The way I have solved it now is that I have a Customer Exit which gives me the Last day of last year (Exp: 31.12.2007) based on input date and use a Offset on the last day of last year date to get the different last dates of each month.
Since we have a leap year (one extra day in February) this year, the offset to calculate the end month dates will be different for 2007 and next year (2009). This solution is not very flexible, and it will not give the correct MTD and YTD if the customer wants to go back to 2007 and off course next year (2009).
One solution is to create 12 Customer Exits that gives me the different month end dates (January-December), and also takes in account leap year for February for the different years. These Exits will be based on the Input date the Customers put in at the variable screen.
I would rather want to avoid making 12 new customer exits and want your advice and expertise to find out if this is possible in any other way (maybe with only 1 customer exit) to get the last date of each month based on an input date.
Thanks for all your advices on beforehand.
Regards
Oddmar Lid

Answer 1

Hi,
Thanks for you replay and documentation, but it doesn't give me excatly the functionality I'm after. The only MTD calculation code the document provides is the calculation of the following functionality:
"Month to Date (MTD) u2013 From the 1st of month to u201CKey Dateu201D - for current year." This doesn't give the the functionality I want, which is to retrieve a given vaule for a Key Figure for the last dates of the months in a year to calculate MTD and YTD.
This way I have created the query is to have multiple hidden Key Figures that calculates the MTD and YTD.
In Columns in Query Designer it will look something like this:
Selection: MTD January--> Date = 31.01.2008, Key Figure (Always Show)
Selection: YTD January --> Date= 31.01.2008, Key Figure (Always Show)
Selection: MTD February --> Date= 29.02.2008, Key Figure (Always Hide)
Formula: MTD February --> MTD February - MTD January (Always Show)
Selection YTD February --> Date = 29.02.2008, Key Figure (Always Show)
And so on....
This is off course a simplified version, but it shows the core of the solution. What I want to achive here is that the dates used to get the Key Figures (last date of a month) is calculated as flexible as possible, so that the users can go back and forth in time without worrying about the leap year problem and so on. I have now used an offset from the last date of last year and this is good for all the normal years, but when it is a leap year the query will use wrong dates to get the key figure vaule for the last date of each month.
Any ideas on how to achieve this without creating 12 different Customer Exit variables (one for each end date of each month)?
Thanks
Regards
Oddmar Lid