This tip tells you how to check for the parameters in function module calls.
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IS REQUESTED: Consider the following function module call in a program. CALL FUNCTION 'ZSURESH_TEST1' EXPORTING CARRID = 'AA' IMPORTING CONNID = connid * FLDATE = * CARRNAME = . Here the FLDATE and CARRNAME parameters are not required. So there is no need in retrieving the same in the function module. In these cases, we can use IS REQUESTED as follows: If CARRNAME is requested. Select single CARRNAME from SCARR Where carrid eq I_carrid. Endif. Since in the above function call, CARRNAME is not requested, the above SELECT statement is not executed. So unnecessary database calls can be restricted. IS REQUESTED is allowed only in a function module and not even in a subroutine called by the function module. IS SUPPLIED: This checks whether the parameter = < p= > was passed during runtime (IMPORTING). For this the parameter = < p= > should be optional, else the system raises an error. This statement can be used in function modules and methods.