How to redirect loading flow in process chain based on logic?

Question

Hi Experts,
I have a scenario where I want to keep data for last 3 years in 3 different cubes.e.g. lets say cube 1 holds data for current 2006 year, cube 2 holds 2005 and cube 3 holds 2004.Now in next year 2007, I want to keep data for 2007, 2006 and 2005.I want to keep data for 2007 in cube 3 which was holding 2004 data.(delete 2004 data and load 2007).
This process should be automated i.e. which cube to load should be done auto.In short, <b>data for new cube should go into cube which is holding data for oldest year.</b>
I want to know :
1) Which Options I can use to do this?
2) What about ABAP program : custom table can be maintained to know which cube is holding what data, but how to redirect loading flow?
3) What about "Decision process type" in process chain?
4) Also would custom process type solve this functionality?
Any ideas would be highly appreciated.
Thanks in advance,
Sorabh

Answer 1

Hi Sorabh,
Its just an Idea, Im assuming that this would work. This should also work for INIT DELTA I guess. But would need proper testing.
Have a Custom Table ZCUBEYEAR and maintain the CUBE as the Key.
ZCUBEYEAR
CUBE     YEAR
Y1       2004
Y2       2005
Y3       2006.
In the update rule->Start Routine for Cube Y1, extract this entry from the table ZCUBEYEAR for Y1, which in this case would be 2004.
DELETE DATA_PACKAGE WHERE YEAR NE YEARFORCUBEY1.
in our case YEARFORCUBEY1 = 2004.
For cube Y2 and Y3 the Delete statement would be as follows in their Start Routines.
DELETE DATA_PACKAGE WHERE YEAR NE YEARFORCUBEY2.
DELETE DATA_PACKAGE WHERE YEAR NE YEARFORCUBEY3.
This would ensure that only 2004 data would flow to Y1, 2005 for Y2 and 2006 for Y3.
Once we come to a NEW YEAR, We need to run a program or Manually change the CUSTOM TABLE "ZCUBEYEAR" updating the cube Y1 with 2007, the Deltas would flow correctly.
Please email me at [email protected], we could have a detailed discussion.
Hope the above helps your cause.
Regards,
Praveen.