I created a authorization object with 0COSTCENTER as *.
0COSTCENTER cp *
Now i created another authorization object with 0COSTCENTER as "Customer exit variable".
Now if I assign both these objects to a user. Then how will sap bw allow for 0COSTCENTER, because one object allows in full another object restrict based on "Customer exit variable".
If there is conflict between objects how will BW consider?
check out SAP Note 1000004 for merging of authorizations. It has all the details.
Use the decision tree for analyzing authorization issues: Guided Answers: Analyzing BW authorizations issues
This also explains the part of the protocol on the merging and combination of multiple authorizations.