SAP LOGEXP BITMASKS documentation, setup help and example usage

ARTICLE

rel_exp - Relational Operators for Bit Patterns
The table below shows the relational operators for comparisons of operands (single data objects or return values or bit expressions ) with bit patterns in byte-like operands in comparison expressions . The data type of the right operand operand2 must be byte-like ( x or xstring ). It contains the bit pattern with which the left operand operand1 is compared. If operand1
is shorter than operand2 , hexadecimal zeroes are appended to the right of operand1 (in accordance with the comparison rules ) to lengthen it appropriately. No conversion takes place.
In Unicode programs , the data type of
operand1 must also be byte-like ( x or xstring ). Outside of Unicode programs, operand1 can be of any elementary data type or have a flat structure .
operator Meaning
ABAP_KEY O Ones : True if the bits that are 1 in
operand2 , are also 1 in operand1 . If operand2 contains only zeroes, the relational expression is always true.
ABAP_KEY Z Zeros : True, if the bits that are 1 in
operand2 are 0 in operand1 . If operand2 contains only zeroes, the relational expression is always true.
ABAP_KEY M Mixed : True, if of the bits that are 1 in operand2 , at least one is 1 and one is 0 in operand1 . If operand2 contains only zeroes, the relational expression is always false.

Note
For the result of the comparisons, it is irrelevant whether the bits that are 0 in operand2 , are 1 or 0 in operand1 .

Example
The logical expression in the IF statement is false, because, before the comparison, 00 is added to the right of hex1 . If the content of hex2 were 111100 , the comparison would be true.
DATA: hex1 TYPE xstring,
hex2 TYPE xstring.

hex1 = 'FFFF'.
hex2 = '111111'.

IF hex1 O hex2.
...
ENDIF.