SUBTRACT is a keyword used in SAP ABAP programming.This tutorial covers its introduction & syntax details.
SUBTRACT
Basic form
SUBTRACT n1 FROM n2.
Effect
Subtracts the contents of n1 from the contents of n2 and stores the result in n2 .
This is equivalent to: n2 = n2 – n1.
Example
DATA NUMBER TYPE P VALUE 3,
RESULT TYPE I VALUE 7.
SUBTRACT NUMBER FROM RESULT.
The field RESULT now contains 4; the value of NUMBER remains unchanged at 3.
Note
Performance
The remarks about conversions and performance under COMPUTE apply equally to SUBTRACT .
The
runtime required to subtract two numbers of type I or F is approx. 2
msn (standardized microseconds). For numbers of type P, about 9 msn are
needed.
Note
Runtime errors
BCD_BADDATA : P field contains no correct BCD format
BCD_FIELD_OVERFLOW : Result field is too small (type P )
BCD_OVERFLOW : Overflow with arithmetic operation (type P )
COMPUTE_INT_MINUS_OVERFLOW : Whole number overflow during subtraction