ABAP Keyword Documentation → ABAP − Reference → Program Flow Logic → Expressions and Functions for Conditions → log_exp - Logical Expressions → rel_exp - Comparison Expressions → rel_exp - Comparison Rules → rel_exp - Comparing Elementary Data Types
rel_exp - Comparison Type of Calculation Expressions
Any calculation expression can be specified as an operand of a comparison expression.
The table below lists all combinations that are possible for calculation expressions in comparison expressions:
| One Page | Relational Operator | Other Page | |
|---|---|---|---|
| Single operand with numeric data type orarithmetic expression | =, EQ,<>, NE, <, LT, >, GT, <=, LE, >=, GE |
Arithmetic expression | |
| Single operand with any elementary data type orstring expression | =, EQ,<>, NE, <, LT, >, GT, <=,LE, >=, GE,CO, CN,CA, NA, CS, NS, CP, NP |
String expression | |
| Single operand with byte-like data type orbit expression | =, EQ,<>, NE, <, LT, >, GT, <=,LE, >=, GE,BYTE-CO, BYTE-CN,BYTE-CA, BYTE-NA, BYTE-CS,BYTE-NS, O, Z, M |
Bit expression |
The comparison type is determined differently depending on the type of calculation expression.
In comparison expressions using the relational operators
BETWEEN and IN
and that are transformed internally to joins of comparisons with the binary operators above, the rules of the respective comparisons apply.
Other versions: 7.31 | 7.40 | 7.54
Notes
- Relational expression cannot yet be compared. Instead, they can be joined using
Boolean operators,
where the join with the operator
EQUIVcorresponds to the equality comparison of the resulting truth values.
- A calculation expression cannot be specified as the operand of a predicate expression.
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rel_exp - Comparison Type of Arithmetic Expressions