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ABAP Keyword Documentation → ABAP − Reference → Program Flow Logic → Expressions and Functions for Conditions → log_exp - Logical Expressions → rel_exp - Relational Expressions → rel_exp - Comparison Rules → rel_exp - Comparing Elementary Data Types → rel_exp - Comparisons of Elementary Data Objects →rel_exp - Comparing Byte-Like Data Types
The following tables show the comparison types for comparisons between byte-like data types and other data types. If the type of an operand is not the same as the comparison type, it is converted to this type.
Comparisons with Numeric Data Types
- | xstring, x |
decfloat34 | decfloat34 |
decfloat16 | decfloat34 |
f | f |
p | p |
i, s, b | i |
Length Adjustments
The comparison type p has 31 decimal places and the number of places in the decimal portion in the operand of type p.
Note
When converting byte-like data types to numeric types, note that all bytes are ignored except for the final four.
Comparisons with Character-Like Data Types
- | xstring | x |
string | string | string |
c | string | c |
n | p | p |
d,t | i | i |
Length Adjustments
Comparisons with Byte-Like Data Types
- | xstring | x |
xstring | xstring | xstring |
x | xstring | x |
Length Adjustments
Example
The first comparison uses the appropriate conversion rules to convert the hexadecimal content "FF00" of hex to the string "FF00"; this string is then compared with "FFxx". Before the second comparison, the appropriate conversion rules are used to convert the content of text to the hexadecimal value "FF00" in the helper variable hex_helper and this value is compared with the content of hex.
DATA hex TYPE x LENGTH 2.
DATA text TYPE c LENGTH 4.
DATA hex_helper TYPE x LENGTH 2.
hex = 'FF00'.
text = 'FFxx'.
IF hex <> text.
cl_demo_output=>write_text( |{ hex } <> { text } | ).
ENDIF.
hex_helper = text.
IF hex = hex_helper.
cl_demo_output=>write_text( |{ hex } = { hex_helper } | ).
ENDIF.
cl_demo_output=>display( ).