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ABAP Keyword Documentation → ABAP − Reference → Program Flow Logic → Expressions and Functions for Conditions → log_exp - Logical Expressions → rel_exp - Predicates → rel_exp - Predicate Expressions →rel_exp - IS ASSIGNED
Syntax
... <fs> IS [NOT] ASSIGNED ...
Effect
This predicate expression checks whether a memory area is assigned to a field symbol <fs>. The expression is true if the field symbol points to a memory area. <fs> expects a field symbol declared using FIELD-SYMBOLS or declared inline using FIELD-SYMBOL( ).
If the addition NOT is used, the expression is true if no memory area is assigned to the field symbol.
Example
Assigns a data object to a field symbol if no memory area has been assigned yet.
FIELD-SYMBOLS <fs> TYPE c.
...
IF <fs> IS NOT ASSIGNED.
ASSIGN 'Standard Text' TO <fs>.
ENDIF.
...