You can use function RSEC_INSERT_FLAT_AUTH for restricting key figures:
Use this function with the below parameters:
- Your authorization name (I_AUTH)
- Your range of what you want to insert - I_RANGE (InfoObject - 0TCAKYFNM; Sign - E or I ; Option - EQ; Low - The Key figure you want to exclude/Include)
Sign
This field allows you to enter either "I" or "E".
"I" (Inclusive) means that the single value or range you specified is selected itself.
"E" (Exclusive) means that the single value or range you specified is excluded from the selection. The default is "I".
Hope this helps to solve your issue.