SAP BW options available in the transfer rule

Assign info object, assign a constant, ABAP routine or a Formula (From version 3.x); example are :

• Assign info object - direct transfer; no transformation
• Constant - for example if you are loading data from a specified country in a flat file, you can make the country as constant and assign the value
• ABAP routine - for example if you want to do some complex string manipulation; assume that you are getting a flag file from legacy data and the cost center is in a field and you have to “massage” the data to get it; in this case use ABAP code
• For simple calculations use formula; for example you want to convert all lower case characters to upper case; use the TOUPPER formula