MEDIUM Effort: M — Medium (days) Architecture

How to remediate: Function group global data abuse

Storing session state in function group global variables. Creates thread safety issues in multi-session ABAP cloud.

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What changes in S/4HANA

ABAP Cloud has different session model. Global FM state causes intermittent bugs.

Before and after: ABAP code example

Before (ECC) 
* ECC: global data in function group (shared state)
FUNCTION-POOL zfg_order_cache.
DATA: gt_cached_orders TYPE STANDARD TABLE OF ty_order,
      gv_last_bukrs    TYPE bukrs.

FUNCTION z_get_cached_order.
  READ TABLE gt_cached_orders ...
ENDFUNCTION.
After (S/4HANA) 
* S/4HANA ABAP Cloud: use instance-based class (no shared state)
CLASS zcl_order_cache DEFINITION PUBLIC CREATE PUBLIC.
  PUBLIC SECTION.
    METHODS get_order
      IMPORTING iv_order TYPE vbeln
      RETURNING VALUE(rs_order) TYPE ty_order.
  PRIVATE SECTION.
    DATA mt_cache TYPE STANDARD TABLE OF ty_order.
ENDCLASS.

Effort estimate and common pitfalls

Effort estimate

M — Medium (days)

Estimate is per affected object. Total effort scales with the number of occurrences in your codebase. Use the A1 scan to get an object-level count before estimating the full project.

Common pitfalls

  • ! Missing related objects that contain the same pattern
  • ! Not testing edge cases after replacing the API
  • ! Skipping regression tests for dependent programs

Related rules to check

HIGH L

ABAP Cloud restricted object access

Access to SAP internal objects without C1 release status. These are blocked in ABAP Cloud.
HIGH XL

Dynamic ABAP (GENERATE SUBROUTINE POOL)

Runtime code generation via GENERATE SUBROUTINE POOL or EXECUTE PROGRAM is restricted in ABAP Cloud.
MEDIUM S

Hardcoded client/system fields

Hardcoded MANDT, client numbers, or system IDs. Breaks in multi-client and cloud scenarios.

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