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 the case of comparison expressions using the relational operators
BETWEEN and
IN that are switched internally to joins of comparisons with the binary operators above, the rules of the individual comparisons apply.
Other versions: 7.31 | 7.40 | 7.54
Notes
- Relational expressions cannot yet be compared. Instead, they can be combined using
Boolean operators,
where the link with the operator
EQUIVcorresponds to the comparison of the resulting logical values concerning equality.
- A calculation expression cannot be specified as the operand of a predicate expression.
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rel_exp - Comparison Type of Arithmetic Expressions