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ABENDICTIONARY_STRUCTURE_ENH - DICTIONARY STRUCTURE ENH

Structure Enhancements in the ABAP Dictionary

As of Release 3.0, you can retroactively enhance the structures and data base tables of the ABAP Dictionary delivered by SAP, by using customer exits or append structures. Such changes are problematic in Unicode programs if the enhancement changes the Unicode fragment view.

For this reason, Release 6.20 introduces the option of classifying the structures and data base tables, which enables you to recognize problems associated with structure enhancements and to correct them. This classification is used during the program check to produce a warning at all places where structures are used and at which subsequent structure enhancements could cause syntax errors or modified program behavior. You can use the enhancement categories listed in the following table as classifications when defining a structure or data base table in the ABAP Dictionary.

The warnings in the program check are - depending on the results of the allowed structure enhancements - divided into three stages from the following table.

Example

If the structure ddic_struc in the ABAP Dictionary is defined with flat components only, but is classified as enhanceable arbitrarily, the following program stage leads to a warning in the syntax check. If the structure were enhanced as permitted by a deep component following delivery of the program, the program would be syntactically incorrect and no longer executable. Therefore, in this case you must either classify the structure ddic_struc in the ABAP Dictionary as enhanceable and character-type, or you must forego the offset/length specification in the program.

DATA: my_struc TYPE ddic_struc,
      str TYPE string,
      off TYPE i,
      len TYPE i.
...
str = my_struc+off(len).