Logical Expressions - Comparison Operators for Byte-Type Fields

In the condition "c1 op c2", the comparison operator op between the fields c1 and c2 may be any of the operations listed below, but c1 and c2 must be byte-type fields (X or XSTRING).

1. BYTE-CO (Contains Only):
   x1 contains only bytes from the byte set x2.
   If x1 has the type XSTRING and is empty, the result of the comparison is always positive.
   If x2 has the XSTRING and is empty, the result of the comparison is always negative, unless x1 is also an empty field with the type XSTRING.
   If the result of the comparison is negative, the field SY-FDPOS is filled with the offset of the first byte in x1 that is not also included in x2.
   If the result of the comparison is positive, the field SY-FDPOS is filled with the length of x1.
   
   Examples:
   x1 = '01020304'.
   x2 = 'FEFF'.
   x3 = '0102'.
   x1 BYTE-CO x2 is false; SY-FDPOS = 0.
   x1 BYTE-CO x3 is false; SY-FDPOS = 2.
   x1 BYTE-CO x1 is true; SY-FDPOS = 4.
   
   
   
2. BYTE-CN (Contains Not only):
   "x1 BYTE-CN x2" is equivalent to " NOT ( x1 BYTE-CO x2 )".
   x1 contains not only bytes from x2.
   If the result of the comparison is positive, SY-FDPOS is filled with the offset of the first byte in x1 that is not also included in x2.
   If the result of the comparison is negative, SY-FDPOS is filled with the length of x1.
   
   
   
3. BYTE-CA (Contains Any):
   x1 contains at least one byte from the byte set x2.
   If x1 or x2 has the type XSTRING and is empty, the result of the comparison is always negative.
   If the result of the comparison is positive, SY-FDPOS is filled with the offset of the first byte in x1 that is also included in x2.
   If the result of the comparison is negative, SY-FDPOS is filled with the length of x1.
   
   Examples:
   x1 = '01020304'.
   x2 = '03FF'.
   x3 = 'FEFF'.
   x1 BYTE-CA x2 is true; SY-FDPOS = 2.
   x1 BYTE-CA x3 is false; SY-FDPOS = 4.
   
   
   
4. BYTE-NA (contains Not Any):
   "x1 BYTE-NA x2" is equivalent to " NOT ( x1 BYTE-CA x-c2 )".
   x1 contains no bytes from x2.
   SY-FDPOS is set accordingly.
   
   
   
5. BYTE-CS (Contains String):
   x1 contains the byte sequence x2.
   An empty field of the type XSTRING is contained in any byte sequence x1, including the empty X-string itself. However, there is no (non-empty) byte sequence x2 contained in an empty byte sequence x1.
   If the result of the comparison is positive, SY-FDPOS is filled with the offset of the first byte of x2 in x1.
   If the result of the comparison is negative, SY-FDPOS is filled with the length of x1.
   
   Examples:
   x1 = '01020304'.
   x2 = '0304'.
   x3 = 'FEFF'.
   x1 BYTE-CS x2 is true; SY-FDPOS = 2.
   x1 BYTE-CS x3 is false; SY-FDPOS = 4.
   
   x1 = '00000102'.
   x2 = '000102'.
   x1 BYTE-CS x2 is true; SY-FDPOS = 1.
   
   
   
6. BYTE-NS (contains No String):
   "x1 BYTE-NS x2" is equivalent to " NOT ( x1 BYTE-CS x2 )".
   x1 does notcontain x2.
   SY-FDPOS is set accordingly.