ABAP Select data from SAP table RNWP_MEDCONTROL_LIST_KFC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNWP_MEDCONTROL_LIST_KFC 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 RNWP_MEDCONTROL_LIST_KFC. 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 RNWP_MEDCONTROL_LIST_KFC 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_RNWP_MEDCONTROL_LIST_KFC TYPE STANDARD TABLE OF RNWP_MEDCONTROL_LIST_KFC,
      WA_RNWP_MEDCONTROL_LIST_KFC TYPE RNWP_MEDCONTROL_LIST_KFC,
      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: <RNWP_MEDCONTROL_LIST_KFC> TYPE RNWP_MEDCONTROL_LIST_KFC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWP_MEDCONTROL_LIST_KFC
*  INTO TABLE @DATA(IT_RNWP_MEDCONTROL_LIST_KFC2).
*--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_RNWP_MEDCONTROL_LIST_KFC INDEX 1 INTO DATA(WA_RNWP_MEDCONTROL_LIST_KFC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWP_MEDCONTROL_LIST_KFC>-ABRKZ = 1.
<RNWP_MEDCONTROL_LIST_KFC>-AUFDT = 1.
<RNWP_MEDCONTROL_LIST_KFC>-AUFZT = 1.
<RNWP_MEDCONTROL_LIST_KFC>-ENTDT = 1.
<RNWP_MEDCONTROL_LIST_KFC>-ENTZT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWP_MEDCONTROL_LIST_KFC-AUFFA, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_KFC-AUFPF, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_KFC-ENTFA, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_KFC-ENTPF, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_KFC-AUFBWART, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_KFC-AUFBWATX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWP_MEDCONTROL_LIST_KFC 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_RNWP_MEDCONTROL_LIST_KFC 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_RNWP_MEDCONTROL_LIST_KFC INTO WA_RNWP_MEDCONTROL_LIST_KFC.


*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 ALPHA, internal->external for field AUFFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_KFC-AUFFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_KFC-AUFFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_KFC-AUFPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_KFC-AUFPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_KFC-ENTFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_KFC-ENTFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_KFC-ENTPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_KFC-ENTPF.
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_RNWP_MEDCONTROL_LIST_KFC_STR, 
ABRKZ TYPE STRING,
AUFDT TYPE STRING,
AUFZT TYPE STRING,
ENTDT TYPE STRING,
ENTZT TYPE STRING,
AUFFA TYPE STRING,
AUFPF TYPE STRING,
ENTFA TYPE STRING,
ENTPF TYPE STRING,
AUFBWART TYPE STRING,
AUFBWATX TYPE STRING,
ENTBWART TYPE STRING,
ENTBWATX TYPE STRING,
ALTPA TYPE STRING,
WFAAZ TYPE STRING,
EAUDF TYPE STRING,
EENDF TYPE STRING,
FANAM TYPE STRING,
DANAM TYPE STRING,
DAUER_ICON TYPE STRING,
LOS TYPE STRING,
LOS_BILL TYPE STRING,
LOSVGL_ICON TYPE STRING,
LOSDAUER_ICON TYPE STRING,
TOB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWP_MEDCONTROL_LIST_KFC_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_RNWP_MEDCONTROL_LIST_KFC_STR-ABRKZ sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFZT sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTZT sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFFA sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFPF sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTFA sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTPF sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFBWART sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-AUFBWATX sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTBWART sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ENTBWATX sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-ALTPA sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-WFAAZ sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-EAUDF sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-EENDF sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-FANAM sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-DANAM sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-DAUER_ICON sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-LOS sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-LOS_BILL sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-LOSVGL_ICON sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-LOSDAUER_ICON sy-vline 
WA_RNWP_MEDCONTROL_LIST_KFC_STR-TOB sy-vline      INTO ld_text SEPARATED BY SPACE.

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