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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
Syntax
... { operand1 {=|EQ|<>|NE|>|GT|<|LT|>=|GE|<=|LE}
| {CO|CN|CA|NA|CS|NS|CP|NP}
| {BYTE-CO|BYTE-CN|BYTE-CA|BYTE-NA|BYTE-CS|BYTE-NS}
| {O|Z|M} operand2 }
| { operand [NOT] BETWEEN operand1 AND operand2 }
| { operand [NOT] IN seltab } ... .
Effect
Comparison expressions join two or more operands with a relational operator to make a relational expression and produce a logical value as the result of the comparison.
operand1, operand2, and operand are general expression positions, which means that the following can be specified:
When a predefined function, a functional method, or a constructor expression is specified, its return value or result is used as an operand. When a calculation expression is specified, its result is used. A single operand can be compared with all single operands listed in the comparison rules for single operands. A calculation expression can be compared with all single operands or comparisons listed in the comparison rules for calculation expressions.