Scheduling WebI reports for Dynamic Date Ranges

Question

Hello Everyone,
Our Env is BOBJ XI 3.1 SP2 FP2.5 integrated with SAP NW  BW 7.02 EPH1
We are trying to schedule few WebI reports which can be used on ad-hoc basis as well. Some reports need to get data from starting of the month to today (like MTD) and few are with dynamic date ranges.
In case of relational universes i used to do Magic Date as mentioned here :  http://www.dagira.com/2008/07/21/using-a-magic-date-value-in-prompts
But for OLAP Universes i have written a MDX filter prompt as :
<FILTER KEY= "@Select(Debit Memo Date\Debit Memo Date LOV)">
<CONDITION OPERATORCONDITION= "Between">
<CONSTANT CAPTION= "IIF (@Prompt('Enter\Select DM Start Date: ','D','First day of Current Month\First day of Current Month',mono,free,not_persistent,{'First Day of Month'},,User:0)='First Day of Month','First day of Current Month\First day of Current Month',@Prompt('Enter\Select DM Start Date: ','D','First day of Current Month\First day of Current Month',mono,free,not_persistent,{'First Day of Month'},,User:0))"/>
<CONSTANT CAPTION= "IIF (@Prompt('Enter\Select DM End Date: ','D','Date2\Today',mono,free,not_persistent,{'Today'},,User:0) > '1/1/2100 12:00:00 AM',''1/1/2010 12:00:00 AM'',(@Prompt('Enter\Select DM End Date: ','D','Date2\Today',mono,free,not_persistent,{'Today'},,User:0))"/>
</CONDITION>
</FILTER>
We are getting MDX erros because IIF can only return numeric values. So are there any other approaches for dynamically scheduling the reports or can the above MDX prompt be modified to make it work ?
- Vamsi Ch

Answer 1

Ingo,
When we schedule the WEBI report we use the BEX query with a variable based on a customer Exit .
There are good examples in
https://wiki.sdn.sap.com/wiki/display/profile/Surendra+Reddy
In order to avoid providing a hard coded date restriction in the BEX query we want to have a flexible date range solution (e.g. data from 1.1.2011 until yesterday).
Is the folloing scenario possible:
Scheduled webi report with a hard coded date e.g. 1.1.1900 (for the BEX variable)
The BEX query should return the data from 1.1.2011 until yesterday (dynamically)  if date = 1.1.1900
else it should return the data (for the e.g. adhoc reporting)
Is a customer exit like this possible ?
Pseudo code:
IF date = 1.1.900 then return sysdate-1 else return entered date
For a relational universe I always used a magic date condition