Relational Operators

• Comparison between Data Types.

  EQ (or) =	Equal To
  NE (or) <> (or) ><	Not Equal To
  LT (or) <	Less Than
  LE (or) <=	Less Than or Equal to
  GT (or) >	Greater Than
  GE (or) >=	Greater Than or Equal To

  
  
• Comparison between Strings.

  CO	Contains Only
  CN	Contains Not Only
  CA	Contains Any
  NA	Contains Not Any
  CS	Contains String
  NS	Contains No String
  CP	Matches pattern
  NP	Does not Matches pattern

  
  
  The special statements for processing strings, there are special comparisons that you can apply to strings with types C, D, N, and T.  
  There are no conversions with these comparisons. Instead, the system compares the characters of the string.  
  
  

  <f1>	<operator>	<f2>	Result	SY-FDPOS
  'BD '	CO	'ABCD '	true	5
  'BD '	CO	'ABCDE'	false	2
  'ABC12'	CN	'ABCD '	true	3
  'ABABC'	CN	'ABCD '	false	5
  'ABcde'	CA	'Bd '	true	1
  'ABcde'	CA	'bD '	false	5
  'ABAB '	NA	'AB '	false	0
  'ababa'	NA	'AB '	true	5
  'ABcde'	CS	'bC '	true	1
  'ABcde'	CS	'ce '	false	5
  'ABcde'	NS	'bC '	false	1
  'ABcde'	NS	'ce '	true	5
  'ABcde'	CP	'*b*'	true	1
  'ABcde'	CP	'*#b*'	false	5
  'ABcde'	NP	'*b*'	false	1
  'ABcde'	NP	'*#b*'	true	5

  
  
  
  
• Comparing Bit Sequences

  O	bits are one
  Z	bits are Zero
  M	bits are Mixed

  The above three operators to compare the bit sequence of the first operand with that of the second.
  The second operand must have type X.
  The comparison takes place over the length of the second operand.
  The first operand is not converted to type X.
  
  
  Example : 
  REPORT demo_log_expr_bits .
  DATA: text(1) TYPE c VALUE 'C',
        hex(1) TYPE x,
        i TYPE i.
  
  hex = 0.
  
  DO 256 TIMES.
    i = hex.
    IF text O hex.
      WRITE: / hex, i.
    ENDIF.
    hex = hex + 1.
  ENDDO.
  
  The output is as follows: 
  
  00          0 
  01          1 
  02          2 
  03          3 
  40         64 
  41         65 
  42         66 
  43         67