ABAP Select data from SAP table RNWP_MEDCONTROL_LIST_NBEW 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_NBEW 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_NBEW. 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_NBEW 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_NBEW TYPE STANDARD TABLE OF RNWP_MEDCONTROL_LIST_NBEW,
      WA_RNWP_MEDCONTROL_LIST_NBEW TYPE RNWP_MEDCONTROL_LIST_NBEW,
      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_NBEW> TYPE RNWP_MEDCONTROL_LIST_NBEW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWP_MEDCONTROL_LIST_NBEW
*  INTO TABLE @DATA(IT_RNWP_MEDCONTROL_LIST_NBEW2).
*--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_NBEW INDEX 1 INTO DATA(WA_RNWP_MEDCONTROL_LIST_NBEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWP_MEDCONTROL_LIST_NBEW>-FALNR = 1.
<RNWP_MEDCONTROL_LIST_NBEW>-LFDNR = 1.
<RNWP_MEDCONTROL_LIST_NBEW>-BEWTY = 1.
<RNWP_MEDCONTROL_LIST_NBEW>-BWIDT = 1.
<RNWP_MEDCONTROL_LIST_NBEW>-BWIZT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWP_MEDCONTROL_LIST_NBEW-BWEDT, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NBEW-BWEZT, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NBEW-ORGFA, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NBEW-ORGPF, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NBEW-PLANB, sy-vline,
  WA_RNWP_MEDCONTROL_LIST_NBEW-STORN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWP_MEDCONTROL_LIST_NBEW 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_NBEW 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_NBEW INTO WA_RNWP_MEDCONTROL_LIST_NBEW.


*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_NBEW-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_NBEW-FALNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWP_MEDCONTROL_LIST_NBEW-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWP_MEDCONTROL_LIST_NBEW-ORGPF.
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_NBEW_STR, 
FALNR TYPE STRING,
LFDNR TYPE STRING,
BEWTY TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
BWEDT TYPE STRING,
BWEZT TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
PLANB TYPE STRING,
STORN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWP_MEDCONTROL_LIST_NBEW_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_NBEW_STR-FALNR sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-LFDNR sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-BEWTY sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-BWIDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-BWIZT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-BWEDT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-BWEZT sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-ORGFA sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-ORGPF sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-PLANB sy-vline 
WA_RNWP_MEDCONTROL_LIST_NBEW_STR-STORN sy-vline      INTO ld_text SEPARATED BY SPACE.

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