ABAP Select data from SAP table RNWP_MEDCONTROL_LIST_NFAL 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_NFAL 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_NFAL. 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_NFAL 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_NFAL TYPE STANDARD TABLE OF RNWP_MEDCONTROL_LIST_NFAL,
      WA_RNWP_MEDCONTROL_LIST_NFAL TYPE RNWP_MEDCONTROL_LIST_NFAL,
      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_NFAL> TYPE RNWP_MEDCONTROL_LIST_NFAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWP_MEDCONTROL_LIST_NFAL
*  INTO TABLE @DATA(IT_RNWP_MEDCONTROL_LIST_NFAL2).
*--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_NFAL INDEX 1 INTO DATA(WA_RNWP_MEDCONTROL_LIST_NFAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWP_MEDCONTROL_LIST_NFAL>-FALNR = 1.
<RNWP_MEDCONTROL_LIST_NFAL>-FALAR = 1.
<RNWP_MEDCONTROL_LIST_NFAL>-ABRKZ = 1.
<RNWP_MEDCONTROL_LIST_NFAL>-ENDDT = 1.
<RNWP_MEDCONTROL_LIST_NFAL>-OBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWP_MEDCONTROL_LIST_NFAL-PATGEW, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NFAL-GWEIN, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NFAL-RESPI, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NFAL-FPEDT, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NFAL-STORN, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NFAL-TOB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWP_MEDCONTROL_LIST_NFAL 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_NFAL 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_NFAL INTO WA_RNWP_MEDCONTROL_LIST_NFAL.


*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 FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_NFAL-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_NFAL-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GWEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_NFAL-GWEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_NFAL-GWEIN.
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_NFAL_STR, 
FALNR TYPE STRING,
FALAR TYPE STRING,
ABRKZ TYPE STRING,
ENDDT TYPE STRING,
OBJNR TYPE STRING,
PATGEW TYPE STRING,
GWEIN TYPE STRING,
RESPI TYPE STRING,
FPEDT TYPE STRING,
STORN TYPE STRING,
TOB TYPE STRING,
READM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWP_MEDCONTROL_LIST_NFAL_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_NFAL_STR-FALNR sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-FALAR sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-ABRKZ sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-ENDDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-OBJNR sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-PATGEW sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-GWEIN sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-RESPI sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-FPEDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-STORN sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-TOB sy-vline 
WA_RNWP_MEDCONTROL_LIST_NFAL_STR-READM sy-vline      INTO ld_text SEPARATED BY SPACE.

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