ABAP Select data from SAP table MDG_S_MATERIAL_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDG_S_MATERIAL_DATA table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to MDG_S_MATERIAL_DATA. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the MDG_S_MATERIAL_DATA table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_MDG_S_MATERIAL_DATA TYPE STANDARD TABLE OF MDG_S_MATERIAL_DATA,
      WA_MDG_S_MATERIAL_DATA TYPE MDG_S_MATERIAL_DATA,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <MDG_S_MATERIAL_DATA> TYPE MDG_S_MATERIAL_DATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MDG_S_MATERIAL_DATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MDG_S_MATERIAL_DATA
  INTO TABLE IT_MDG_S_MATERIAL_DATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_S_MATERIAL_DATA
*  INTO TABLE @DATA(IT_MDG_S_MATERIAL_DATA2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_MDG_S_MATERIAL_DATA INDEX 1 INTO DATA(WA_MDG_S_MATERIAL_DATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MDG_S_MATERIAL_DATA ASSIGNING <MDG_S_MATERIAL_DATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_S_MATERIAL_DATA>-MATNR = 1.
<MDG_S_MATERIAL_DATA>-MATNR_EXT = 1.
<MDG_S_MATERIAL_DATA>-MATERIAL_DATA = 1.
<MDG_S_MATERIAL_DATA>-MARA_TAB = 1.
<MDG_S_MATERIAL_DATA>-MARA_X_TAB = 1.

ENDLOOP.

LOOP AT IT_MDG_S_MATERIAL_DATA INTO WA_MDG_S_MATERIAL_DATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_S_MATERIAL_DATA-MAKT_TAB, sy-vline,
  WA_MDG_S_MATERIAL_DATA-MAKT_X_TAB, sy-vline,
  WA_MDG_S_MATERIAL_DATA-MARC_TAB, sy-vline,
  WA_MDG_S_MATERIAL_DATA-MARC_X_TAB, sy-vline,
  WA_MDG_S_MATERIAL_DATA-MARD_TAB, sy-vline,
  WA_MDG_S_MATERIAL_DATA-MARD_X_TAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_S_MATERIAL_DATA you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_MDG_S_MATERIAL_DATA TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_MDG_S_MATERIAL_DATA INTO WA_MDG_S_MATERIAL_DATA.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MDG_S_MATERIAL_DATA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_S_MATERIAL_DATA-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNL, internal->external for field MATNR_EXT
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MDG_S_MATERIAL_DATA-MATNR_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_S_MATERIAL_DATA-MATNR_EXT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MDG_S_MATERIAL_DATA_STR, 
MATNR TYPE STRING,
MATNR_EXT TYPE STRING,
MATERIAL_DATA TYPE STRING,
MARA_TAB TYPE STRING,
MARA_X_TAB TYPE STRING,
MAKT_TAB TYPE STRING,
MAKT_X_TAB TYPE STRING,
MARC_TAB TYPE STRING,
MARC_X_TAB TYPE STRING,
MARD_TAB TYPE STRING,
MARD_X_TAB TYPE STRING,
MARM_TAB TYPE STRING,
MARM_X_TAB TYPE STRING,
MEAN_TAB TYPE STRING,
MEAN_X_TAB TYPE STRING,
MFHM_TAB TYPE STRING,
MFHM_X_TAB TYPE STRING,
MLAN_PURCHASE_TAB TYPE STRING,
MLAN_PURCHASE_X_TAB TYPE STRING,
MLAN_SALES_TAB TYPE STRING,
MLAN_SALES_X_TAB TYPE STRING,
MBEW_TAB TYPE STRING,
MBEW_X_TAB TYPE STRING,
MLGN_TAB TYPE STRING,
MLGN_X_TAB TYPE STRING,
MLGT_TAB TYPE STRING,
MLGT_X_TAB TYPE STRING,
MPGD_TAB TYPE STRING,
MPGD_X_TAB TYPE STRING,
MPOP_TAB TYPE STRING,
MPOP_X_TAB TYPE STRING,
MVKE_TAB TYPE STRING,
MVKE_X_TAB TYPE STRING,
NOTES_TAB TYPE STRING,
NOTES_LINES_TAB TYPE STRING,
NOTES_X_TAB TYPE STRING,
PLANT_NOTES_TAB TYPE STRING,
PLANT_NOTES_LINES_TAB TYPE STRING,
PLANT_NOTES_X_TAB TYPE STRING,
SALES_NOTES_TAB TYPE STRING,
SALES_NOTES_LINES_TAB TYPE STRING,
SALES_NOTES_X_TAB TYPE STRING,
QMAT_TAB TYPE STRING,
QMAT_X_TAB TYPE STRING,
CKMLHD_TAB TYPE STRING,
CKMLHD_X_TAB TYPE STRING,
CKMLCR_TAB TYPE STRING,
CKMLCR_X_TAB TYPE STRING,
CKMLPR_TAB TYPE STRING,
CKMLPR_X_TAB TYPE STRING,
MDMA_TAB TYPE STRING,
MDMA_X_TAB TYPE STRING,
E1CUCOM_TAB TYPE STRING,
E1CUCOM_X_TAB TYPE STRING,
E1CUCFG_TAB TYPE STRING,
E1CUCFG_X_TAB TYPE STRING,
E1CUVAL_TAB TYPE STRING,
E1CUVAL_X_TAB TYPE STRING,
E1CUINS_TAB TYPE STRING,
E1CUINS_X_TAB TYPE STRING,
DRAD_DATA TYPE STRING,
DRAD_TAB TYPE STRING,
DRAD_NOTES_TAB TYPE STRING,
MKAL_DATA TYPE STRING,
MKAL_TAB TYPE STRING,
MKAL_X_TAB TYPE STRING,
MARA_AEOI_DATA TYPE STRING,
CLF_DATA TYPE STRING,
CURRENT_STATE TYPE STRING,
CLASSASGN TYPE STRING,
VALUATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_S_MATERIAL_DATA_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_MDG_S_MATERIAL_DATA_STR-MATNR sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MATNR_EXT sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MATERIAL_DATA sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARA_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARA_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MAKT_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MAKT_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARC_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARC_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARD_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARD_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARM_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARM_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MEAN_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MEAN_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MFHM_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MFHM_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLAN_PURCHASE_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLAN_PURCHASE_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLAN_SALES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLAN_SALES_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MBEW_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MBEW_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLGN_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLGN_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLGT_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MLGT_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MPGD_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MPGD_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MPOP_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MPOP_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MVKE_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MVKE_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-NOTES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-NOTES_LINES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-NOTES_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-PLANT_NOTES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-PLANT_NOTES_LINES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-PLANT_NOTES_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-SALES_NOTES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-SALES_NOTES_LINES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-SALES_NOTES_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-QMAT_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-QMAT_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLHD_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLHD_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLCR_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLCR_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLPR_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CKMLPR_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MDMA_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MDMA_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUCOM_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUCOM_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUCFG_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUCFG_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUVAL_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUVAL_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUINS_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-E1CUINS_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-DRAD_DATA sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-DRAD_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-DRAD_NOTES_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MKAL_DATA sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MKAL_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MKAL_X_TAB sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-MARA_AEOI_DATA sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CLF_DATA sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CURRENT_STATE sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-CLASSASGN sy-vline 
WA_MDG_S_MATERIAL_DATA_STR-VALUATION sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.