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ABAP Code Snippet ARTICLE
Cannot Use Short Forms in Line Operations You cannot use the short form in any of the operations performed on the lines of a table in ABAP Objects. Instead you must always work with an explicit work area or field symbol.
In ABAP Objects, the following statements cause an error message:
INSERT wa INTO TABLE itab. COLLECT wa INTO itab. READ TABLE itab ... INTO wa | ASSIGNING <(><<)>fs>. MODIFY TABLE itab FROM wa ... MODIFY itab FROM wa ... WHERE ... DELETE TABLE itab FROM wa. LOOP AT itab INTO wa ... | ASSIGNING <(><<)>fs> ...
Operations for index tables
APPEND wa TO itab. INSERT wa INTO itab ... MODIFY itab FROM wa ...
Cause:
The reasons for this lie in the unambiguous separation of tables from work areas. This makes programs easier to read. Since you can declare tables without a header line only in classes, this is only a constraint in local classes when accessing global tables in the main program.