ABAP Select data from SAP table MDG_BS_CLF_S_VALUE_MAP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDG_BS_CLF_S_VALUE_MAP 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_BS_CLF_S_VALUE_MAP. 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_BS_CLF_S_VALUE_MAP 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_BS_CLF_S_VALUE_MAP TYPE STANDARD TABLE OF MDG_BS_CLF_S_VALUE_MAP,
      WA_MDG_BS_CLF_S_VALUE_MAP TYPE MDG_BS_CLF_S_VALUE_MAP,
      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_BS_CLF_S_VALUE_MAP> TYPE MDG_BS_CLF_S_VALUE_MAP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_BS_CLF_S_VALUE_MAP
*  INTO TABLE @DATA(IT_MDG_BS_CLF_S_VALUE_MAP2).
*--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_BS_CLF_S_VALUE_MAP INDEX 1 INTO DATA(WA_MDG_BS_CLF_S_VALUE_MAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_BS_CLF_S_VALUE_MAP>-OBJTYPE = 1.
<MDG_BS_CLF_S_VALUE_MAP>-OBJNUM = 1.
<MDG_BS_CLF_S_VALUE_MAP>-CLASSTYPE = 1.
<MDG_BS_CLF_S_VALUE_MAP>-ATINN = 1.
<MDG_BS_CLF_S_VALUE_MAP>-VALCNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_BS_CLF_S_VALUE_MAP-ADZHL, sy-vline,
  WA_MDG_BS_CLF_S_VALUE_MAP-VALUE, sy-vline,
  WA_MDG_BS_CLF_S_VALUE_MAP-NAME, sy-vline,
  WA_MDG_BS_CLF_S_VALUE_MAP-ATWRT, sy-vline,
  WA_MDG_BS_CLF_S_VALUE_MAP-ATFLV, sy-vline,
  WA_MDG_BS_CLF_S_VALUE_MAP-ATAWE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_BS_CLF_S_VALUE_MAP 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_BS_CLF_S_VALUE_MAP 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_BS_CLF_S_VALUE_MAP INTO WA_MDG_BS_CLF_S_VALUE_MAP.


*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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_CLF_S_VALUE_MAP-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_CLF_S_VALUE_MAP-ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_CLF_S_VALUE_MAP-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_CLF_S_VALUE_MAP-ATAWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_CLF_S_VALUE_MAP-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_CLF_S_VALUE_MAP-ATAW1.
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_BS_CLF_S_VALUE_MAP_STR, 
OBJTYPE TYPE STRING,
OBJNUM TYPE STRING,
CLASSTYPE TYPE STRING,
ATINN TYPE STRING,
VALCNT TYPE STRING,
ADZHL TYPE STRING,
VALUE TYPE STRING,
NAME TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_BS_CLF_S_VALUE_MAP_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_BS_CLF_S_VALUE_MAP_STR-OBJTYPE sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-OBJNUM sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-CLASSTYPE sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATINN sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-VALCNT sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ADZHL sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-VALUE sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-NAME sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATWRT sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATFLV sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATAWE sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATFLB sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATAW1 sy-vline 
WA_MDG_BS_CLF_S_VALUE_MAP_STR-ATCOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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