SAP MDG · VALIDATION DERIVATION
How do I implement SAP MDG derivation so material descriptions are built from classification values in IF_EX_USMD_RULE_SERVICE2~DERIVE?
Use a derivation BAdI implementation on IF_EX_USMD_RULE_SERVICE2~DERIVE to read changed valuation data, merge it with existing classification values, build the description text, and write the updated material text data back to the MDG change buffer.
SOLUTION SUMMARY · SHORT ANSWER
Use a derivation BAdI implementation on IF_EX_USMD_RULE_SERVICE2~DERIVE to read changed valuation data, merge it with existing classification values, build the description text, and write the updated material text data back to the MDG change buffer.
Use a derivation BAdI implementation on IF_EX_USMD_RULE_SERVICE2~DERIVE. The source example class CL_MDG_BS_MAT_CLF2DESCRIPTION shows the full pattern: resolve internal characteristic IDs for IB_TYPE and IB_COLOR, read only changed valuation data from io_changed_data, merge changed and existing values, build the description text, and update the material entity through the MDG write buffer. Below are the exact implementation steps and the source-supported ABAP pattern.
Process flow
- Create the MDG rule-service BAdI implementation and bind an implementing class.
- Implement IF_EX_USMD_RULE_SERVICE2 in the class.
- Resolve internal characteristic IDs for IB_TYPE and IB_COLOR in CLASS_CONSTRUCTOR using GET_ATINN.
- In DERIVE, read changed valuation rows from io_changed_data for entity valuation.
- Collect the affected MATNR values from the changed rows.
- For each material, detect whether IB_TYPE and/or IB_COLOR changed.
- Read current classification with READ_CLASSIFICATION when at least one relevant characteristic changed.
- Merge changed and existing values to form the final description text. Use CONCATENATE lv_value1 ': ' lv_value2 INTO lv_description. Create the material text data reference, fill language rows, and write back through io_write_data->write_dat
CONFIGURATIONSource-backed paths
Referenced tables
| Object | Purpose |
|---|---|
CABN | Characteristic master data table used by CLSE_SELECT_CABN_VIA_NAME to resolve ATINN from characteristic name. |
ILLUSTRATIVE ABAP SAMPLE
Source ABAP example
Exact relevant implementation excerpt from the knowledge document.
1class CL_MDG_BS_MAT_CLF2DESCRIPTION definition
2 public
3 final
4 create public .
5
6public section.
7
8 interfaces IF_BADI_INTERFACE .
9 interfaces IF_EX_USMD_RULE_SERVICE2 .
10
11 class-methods CLASS_CONSTRUCTOR .
12protected section.
13private section.
14
15 types:
16 ty_valuation_tab TYPE STANDARD TABLE OF /mdgmm/_s_mm_pp_valuation WITH DEFAULT KEY .
17
18 constants GC_CLASSTYPE type KLASSENART value '001'. "#EC NOTEXT
19 constants GC_CHARNAME1 type ATNAM value 'IB_TYPE'. "#EC NOTEXT
20 constants GC_CHARNAME2 type ATNAM value 'IB_COLOR'. "#EC NOTEXT
21 class-data GV_CHARID1 type MDG_BS_CLF_CHARID .
22 class-data GV_CHARID2 type MDG_BS_CLF_CHARID .
23
24 class-methods READ_CLASSIFICATION
25 importing
26 !IV_MATNR type MATNR
27 !IV_CLASSTYPE type KLASSENART
28 !IO_MODEL type ref to IF_USMD_MODEL_EXT
29 returning
30 value(RT_VALUATION) type TY_VALUATION_TAB
31 raising
32 CX_MDG_BS_MAT_GEN .
33 class-methods GET_ATINN
34 importing
35 !IV_CHARNAME type ATNAM
36 returning
37 value(RV_CHARID) type ATINN .
38ENDCLASS.
39
40
41
42CLASS CL_MDG_BS_MAT_CLF2DESCRIPTION IMPLEMENTATION.
43
44
45method CLASS_CONSTRUCTOR.
46 " Get the internal characteristic IDs
47 gv_charid1 = get_atinn( gc_charname1 ).
48 gv_charid2 = get_atinn( gc_charname2 ).
49endmethod.
50
51
52METHOD get_atinn.
53 DATA: lt_cabn TYPE STANDARD TABLE OF cabn.
54 DATA: ls_cabn TYPE cabn.
55 CLEAR rv_charid.
56 ASSERT iv_charname <> space.
57 " Read internal characteristic ID from characteristic name
58 CALL FUNCTION 'CLSE_SELECT_CABN_VIA_NAME'
59 EXPORTING
60 characteristic = iv_charname
61 TABLES
62 t_cabn = lt_cabn
63 EXCEPTIONS
64 OTHERS = 0.
65 READ TABLE lt_cabn INTO ls_cabn INDEX 1.
66 rv_charid = ls_cabn-atinn.
67ENDMETHOD.
68
69
70METHOD if_ex_usmd_rule_service2~derive.
71* Merges the valuation of two characteristics (hard-coded on IDs) into description
72* Assumptions:
73* - No change number
74* - No multi-value characteristics
75 DATA: lt_valuation TYPE ty_valuation_tab.
76 DATA: ls_valuation TYPE /mdgmm/_s_mm_pp_valuation.
77 DATA: lr_exc TYPE REF TO cx_mdg_bs_mat_gen.
78 DATA: ls_message TYPE usmd_s_message.
79 DATA: lr_mod TYPE REF TO data.
80 DATA: lt_attribute TYPE usmd_ts_fieldname.
81 DATA: lrt_entity_data TYPE REF TO data.
82 DATA: ls_description TYPE /mdgmm/_st_mm_pp_material.
83 DATA: lv_description TYPE usmd_txtmi.
84 DATA: lv_found1 TYPE abap_bool.
85 DATA: lv_found2 TYPE abap_bool.
86 DATA: lv_value1 TYPE atwrt.
87 DATA: lv_value2 TYPE atwrt.
88 DATA: lt_matnr TYPE SORTED TABLE OF matnr WITH UNIQUE KEY table_line.
89 DATA: lr_descr_struc TYPE REF TO data.
90 DATA: lo_structdescr TYPE REF TO cl_abap_structdescr.
91 FIELD-SYMBOLS: <lf_component> TYPE abap_compdescr.
92 FIELD-SYMBOLS: <lt_description> TYPE STANDARD TABLE.
93 FIELD-SYMBOLS: <ls_description> TYPE any.
94 FIELD-SYMBOLS: <lt_mod> TYPE SORTED TABLE.
95 FIELD-SYMBOLS: <ls_mod> TYPE any.
96 FIELD-SYMBOLS: <lv_matnr> TYPE matnr.
97 CLEAR: et_message_info.
98 " Only consider changed valuations
99 CALL METHOD io_changed_data->read_data
100 EXPORTING
101 i_entity = if_mdg_bs_mat_gen_c=>gc_entity_valuation
102 IMPORTING
103 er_t_data_mod = lr_mod.
104 CHECK lr_mod IS BOUND.
105 ASSIGN lr_mod->* TO <lt_mod>.
106 CHECK sy-subrc = 0 AND <lt_mod> IS ASSIGNED AND <lt_mod> IS NOT INITIAL.
107 " Get the material numbers
108 LOOP AT <lt_mod> ASSIGNING <ls_mod>.
109 ASSIGN COMPONENT if_mdg_bs_mat_gen_c=>gc_attr_material OF STRUCTURE <ls_mod> TO <lv_matnr>.
110 INSERT <lv_matnr> INTO TABLE lt_matnr.
111 ENDLOOP.
112 " Derive description for all changed materials
113 LOOP AT lt_matnr ASSIGNING <lv_matnr>.
114 CLEAR: lv_value1, lv_value2, lv_found1, lv_found2.
115 " Get the changed classification values
116 " if the two characteristics have been changed for the current material
117 LOOP AT <lt_mod> ASSIGNING <ls_mod>.
118 MOVE-CORRESPONDING <ls_mod> TO ls_valuation.
119 CHECK ls_valuation-material = <lv_matnr>.
120 IF ls_valuation-charid = gv_charid1.The remaining configuration, implementation details, and testing guidance continue from this answer more…
Related questions and keywords
Alternative questions
- How do I derive a material description from classification characteristics in SAP MDG?
- How is IF_EX_USMD_RULE_SERVICE2~DERIVE implemented for material classification in MDG?
- How can I update the material description when IB_TYPE or IB_COLOR changes?
Possible questions
- Which BAdI and method are used for MDG derivation?
- How do I read changed classification data in a derivation BAdI?
- How do I get internal characteristic IDs from characteristic names?
- How do I write derived material description data back to the MDG change buffer?
- What class implements the material classification-to-description derivation example?